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595 lines
318 KiB
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595 lines
318 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
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<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="F02B" definition-exists="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>INTERNAL-COMBUSTION PISTON ENGINES</text></title-part><title-part><text>COMBUSTION ENGINES IN GENERAL </text><reference><text>gas-turbine plants <class-ref scheme="cpc">F02C</class-ref>; hot-gas or combustion-product positive-displacement engine plants <class-ref scheme="cpc">F02G</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> In this subclass, the following terms or expressions are used with the meanings indicated: <subnote type="bullet"><note-paragraph>"positive ignition" means ignition by a source external to the working fluid, e.g. by spark or incandescent source;</note-paragraph><note-paragraph>"charging" means forcing air or fuel-air mixture into engine cylinders, and thus includes supercharging;</note-paragraph><note-paragraph>"scavenging" means forcing the combustion residues from the cylinders other than by movement of the working pistons, and thus includes tuned exhaust systems.</note-paragraph></subnote></note-paragraph><note-paragraph>Attention is drawn to the Notes preceding class <class-ref scheme="cpc">F01</class-ref>, especially as regards Note (1).</note-paragraph><note-paragraph> Engines with specified cycles or number of cylinders are classified in group <class-ref scheme="cpc">F02B75/02</class-ref> or <class-ref scheme="cpc">F02B75/16</class-ref>, unless other classifying features predominate. </note-paragraph></note><note type="warning"><note-paragraph><CPC-specific-note>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</CPC-specific-note></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F02B1/00" date-revised="2021-01-01" status="published"><classification-symbol>F02B1/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by the working fluid to be compressed or characterised by the type of ignition</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B1/00" definition-exists="true" ipc-concordant="F02B1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B1/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by fuel-air mixture compression </text><reference><text>characterised by both fuel-air mixture compression and air compression, or characterised by both positive ignition and compression ignition <class-ref scheme="cpc">F02B11/00</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> in this group the following indexing codes are used: <subnote><note-paragraph><class-ref scheme="cpc">F02B2700/02</class-ref> - <class-ref scheme="cpc">F02B2720/30</class-ref></note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B1/02" definition-exists="true" ipc-concordant="F02B1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B1/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with positive ignition </text><reference><text>with non-timed positive ignition <class-ref scheme="cpc">F02B9/06</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B1/04" definition-exists="true" ipc-concordant="F02B1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with fuel-air mixture admission into cylinder</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B1/06" definition-exists="true" ipc-concordant="F02B1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of operating</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B1/08" definition-exists="true" ipc-concordant="F02B1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with separate admission of air and fuel into cylinder</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B1/10" definition-exists="true" ipc-concordant="F02B1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B1/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of operating</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B1/12" definition-exists="true" ipc-concordant="F02B1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B1/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with compression ignition </text><reference><text>with fuel-air charge ignited by compression ignition of an additional fuel <class-ref scheme="cpc">F02B7/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B1/14" definition-exists="false" ipc-concordant="F02B1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B1/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of operating</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B3/00" definition-exists="true" ipc-concordant="F02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B3/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by air compression and subsequent fuel addition </text><reference><text>characterised by both fuel-air mixture compression and air compression, or characterised by both positive ignition and compression ignition <class-ref scheme="cpc">F02B11/00</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> in this group the following indexing codes are used: <subnote><note-paragraph><class-ref scheme="cpc">F02B2700/02</class-ref> - <class-ref scheme="cpc">F02B2720/30</class-ref></note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B3/02" definition-exists="true" ipc-concordant="F02B3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with positive ignition </text><reference><text>with non-timed positive ignition <class-ref scheme="cpc">F02B9/06</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B3/04" definition-exists="true" ipc-concordant="F02B3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of operating</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B3/06" definition-exists="true" ipc-concordant="F02B3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B3/06</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>with compression ignition </text><reference><text>compression ignition engines using air or gas for blowing fuel into compressed air in cylinder <class-ref scheme="cpc">F02B13/02</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B3/08" definition-exists="true" ipc-concordant="F02B3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of operating </text><reference><text><class-ref scheme="cpc">F02B3/12</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B3/10" definition-exists="true" ipc-concordant="F02B3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with intermittent fuel introduction</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B3/12" definition-exists="false" ipc-concordant="F02B3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B3/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of operating</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B5/00" definition-exists="true" ipc-concordant="F02B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B5/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by positive ignition </text><reference><text>engines characterised by fuel-air mixture compression with positive ignition <class-ref scheme="cpc">F02B1/02</class-ref>; engines characterised by air compression and subsequent fuel addition with positive ignition <class-ref scheme="cpc">F02B3/02</class-ref>; with non-timed positive ignition <class-ref scheme="cpc">F02B9/06</class-ref>; characterised by both fuel-air mixture compression and air compression, or characterised by both positive ignition and compression ignition <class-ref scheme="cpc">F02B11/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B5/02" definition-exists="true" ipc-concordant="F02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B5/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of operating</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B7/00" definition-exists="true" ipc-concordant="F02B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B7/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by the fuel-air charge being ignited by compression ignition of an additional fuel </text><reference><text>characterised by both fuel-air mixture compression and air compression, or characterised by both positive ignition and compression ignition <class-ref scheme="cpc">F02B11/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B7/02" definition-exists="false" ipc-concordant="F02B7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B7/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fuel in the charge being liquid</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B7/04" definition-exists="false" ipc-concordant="F02B7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B7/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of operating</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B7/06" definition-exists="false" ipc-concordant="F02B7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B7/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fuel in the charge being gaseous</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B7/08" definition-exists="false" ipc-concordant="F02B7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of operating</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B9/00" definition-exists="true" ipc-concordant="F02B9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B9/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by other types of ignition </text><reference><text>characterised by both fuel-air mixture compression and air compression, or characterised by both positive ignition and compression ignition <class-ref scheme="cpc">F02B11/00</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> - in this group the following indexing codes are used: <subnote><note-paragraph><class-ref scheme="cpc">F02B2700/02</class-ref> - <class-ref scheme="cpc">F02B2720/30</class-ref></note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B9/02" definition-exists="false" ipc-concordant="F02B9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B9/02</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>with compression ignition </text><reference><text>engines characterised by fuel-air mixture compression with compression ignition <class-ref scheme="cpc">F02B1/12</class-ref>; engines characterised by air compression and subsequent fuel addition with compression ignition <class-ref scheme="cpc">F02B3/06</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B9/04" definition-exists="false" ipc-concordant="F02B9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B9/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of operating</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B9/06" definition-exists="false" ipc-concordant="F02B9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B9/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with non-timed positive ignition, e.g. with hot-spots</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B9/08" definition-exists="true" ipc-concordant="F02B9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B9/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with incandescent chambers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B9/10" definition-exists="false" ipc-concordant="F02B9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B9/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Chamber shapes or constructions</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B11/00" definition-exists="true" ipc-concordant="F02B11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B11/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by both fuel-air mixture compression and air compression, or characterised by both positive ignition and compression ignition, e.g. in different cylinders</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B11/02" definition-exists="false" ipc-concordant="F02B11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F02B11/02</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>convertible from fuel-air mixture compression to air compression or <u>vice versa</u></text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F02B13/00" date-revised="2021-01-01" status="published"><classification-symbol>F02B13/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by the method of introducing liquid fuel into cylinders</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B13/00" definition-exists="true" ipc-concordant="F02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B13/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines characterised by the introduction of liquid fuel into cylinders by use of auxiliary fluid</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B13/02" definition-exists="false" ipc-concordant="F02B13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B13/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Compression ignition engines using air or gas for blowing fuel into compressed air in cylinder</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B13/04" definition-exists="false" ipc-concordant="F02B13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B13/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements or adaptations of pumps</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B13/06" definition-exists="false" ipc-concordant="F02B13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B13/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines having secondary air mixed with fuel in pump, compressed therein without ignition, and fuel-air mixture being injected into air in cylinder</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B13/08" definition-exists="false" ipc-concordant="F02B13/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B13/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements or adaptations of pumps</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B13/10" definition-exists="false" ipc-concordant="F02B13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B13/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Use of specific auxiliary fluids, e.g. steam, combustion gas</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B15/00" definition-exists="true" ipc-concordant="F02B15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B15/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines characterised by the method of introducing liquid fuel into cylinders and not otherwise provided for</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B15/02" definition-exists="false" ipc-concordant="F02B15/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B15/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having means for sucking fuel directly into cylinder</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B17/00" definition-exists="true" ipc-concordant="F02B17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B17/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines characterised by means for effecting stratification of charge in cylinders</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B17/005" definition-exists="false" ipc-concordant="F02B17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B17/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having direct injection in the combustion chamber</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F02B19/00" date-revised="2021-01-01" status="published"><classification-symbol>F02B19/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by precombustion chambers or air-storage chambers, or characterised by special shape or construction of combustion chambers to improve operation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B19/00" definition-exists="true" ipc-concordant="F02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B19/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by precombustion chambers</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B19/002" definition-exists="false" ipc-concordant="F02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2019/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with electric heater fitted to at least part of prechamber-wall or transfer passage</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B19/004" definition-exists="false" ipc-concordant="F02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2019/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with heater control</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B19/006" definition-exists="false" ipc-concordant="F02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2019/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with thermal insulation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B19/008" definition-exists="false" ipc-concordant="F02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2019/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>variable</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B19/02" definition-exists="false" ipc-concordant="F02B19/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the chamber being periodically isolated from its cylinder</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B19/04" definition-exists="false" ipc-concordant="F02B19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the isolation being effected by a protuberance on piston or cylinder head</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B19/06" definition-exists="false" ipc-concordant="F02B19/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with auxiliary piston in chamber for transferring ignited charge to cylinder space</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B19/08" definition-exists="false" ipc-concordant="F02B19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the chamber being of air-swirl type</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B19/10" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B19/10</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>with fuel introduced partly into pre-combustion chamber, and partly into cylinder</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B19/1004" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>details of combustion chamber, e.g. mounting arrangements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B19/1009" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>heating, cooling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B19/1014" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>design parameters, e.g. volume, torch passage cross sectional area, length, orientation, or the like</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B19/1019" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1019</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with only one pre-combustion chamber </text><reference><text><class-ref scheme="cpc">F02B19/1004</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B19/1023" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>pre-combustion chamber and cylinder being fed with fuel-air mixture(s)</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B19/1028" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>pre-combustion chamber and cylinder having both intake ports or valves, e.g. HONDS CVCC</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F02B19/1033" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted valves, e.g. rotary valves, pre-combustion chamber being part of a valve</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F02B19/1038" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1038</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>timing of valves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F02B19/1042" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>auxiliary intake, valve drive</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F02B19/1047" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>means for varying the size of the torch passage</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F02B19/1052" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>controlling, e.g. varying fuel-air ratio, quantity of charge</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F02B19/1057" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with fuel injectors disposed upstream of intake valves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F02B19/1061" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>F02B19/1061</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>with residual gas chamber, e.g. containing spark plug</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B19/1066" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>pre-combustion chamber having an inlet and an outlet port and with two distinct intake conduits or with one intake conduit in which the heavier fuel particles are separated from the main stream, e.g. by gravitational forces</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B19/1071" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>pre-combustion chamber having only one orifice,(i.e. an orifice by means of which it communicates with the cylinder); the intake system comprising two distinct intake conduits</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B19/1076" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>pre-combustion chamber being formed within the piston, e.g. two-cycle engines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B19/108" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with fuel injection at least into pre-combustion chamber, i.e. injector mounted directly in the pre-combustion chamber</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B19/1085" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>controlling fuel injection</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B19/109" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/109</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with injection of a fuel-air mixture into the pre-combustion chamber by means of a pump, e.g. two-cycle engines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B19/1095" definition-exists="false" ipc-concordant="F02B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/1095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with more than one pre-combustion chamber (a stepped form of the main combustion chamber above the piston is to be considered as a pre-combustion chamber if this stepped portion is not a squish area)</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B19/12" definition-exists="false" ipc-concordant="F02B19/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B19/12</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>with positive ignition </text><reference><text>engines with non-timed positive ignition, and with incandescent chambers <class-ref scheme="cpc">F02B9/08</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B19/14" definition-exists="false" ipc-concordant="F02B19/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B19/14</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>with compression ignition</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B19/16" definition-exists="false" ipc-concordant="F02B19/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F02B19/16</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Chamber shapes or constructions not specific to sub-groups <class-ref scheme="cpc">F02B19/02</class-ref> - <class-ref scheme="cpc">F02B19/10</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B19/165" definition-exists="false" ipc-concordant="F02B19/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>The shape or construction of the pre-combustion chambers is specially adapted to be formed, at least in part, of ceramic material </text><reference><text>surface coverings of combustion-gas-swept parts <class-ref scheme="cpc">F02B77/02</class-ref>; shaped ceramic products characterised by their composition or ceramic compositions <class-ref scheme="cpc">C04B35/00</class-ref>; ceramic material for engine casings <class-ref scheme="cpc">F02F7/0087</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B19/18" definition-exists="false" ipc-concordant="F02B19/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B19/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transfer passages between chamber and cylinder</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B21/00" definition-exists="true" ipc-concordant="F02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B21/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines characterised by air-storage chambers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B21/02" definition-exists="false" ipc-concordant="F02B21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B21/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Chamber shapes or constructions</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B23/00" definition-exists="true" ipc-concordant="F02B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F02B23/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Other engines characterised by special shape or construction of combustion chambers to improve operation </text><reference><text>engines with incandescent chambers <class-ref scheme="cpc">F02B9/08</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> - in this group the following indexing codes are used: <subnote><note-paragraph><class-ref scheme="cpc">F02B2700/02</class-ref> - <class-ref scheme="cpc">F02B2720/30</class-ref></note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B23/02" definition-exists="false" ipc-concordant="F02B23/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with compression ignition</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B23/04" definition-exists="false" ipc-concordant="F02B23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the combustion space being subdivided into two or more chambers </text><reference><text>with pre-combustion chambers <class-ref scheme="cpc">F02B19/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B23/06" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the combustion space being arranged in working piston </text><reference><text><class-ref scheme="cpc">F02B23/04</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B23/0603" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0603</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at least part of the interior volume or the wall of the combustion space being made of material different from the surrounding piston part, e.g. combustion space formed within a ceramic part fixed to a metal piston head</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B23/0606" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2023/0606</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the material being a catalyst</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B23/0609" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2023/0609</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the material being a porous medium, e.g. sintered metal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B23/0612" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2023/0612</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the material having a high temperature and pressure resistance, e.g. ceramic</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B23/0615" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2023/0615</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the combustion space having a volume defined by revolution around an axis inclined relative to the cylinder axis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B23/0618" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0618</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having in-cylinder means to influence the charge motion</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/0621" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0621</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Squish flow</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/0624" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0624</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Swirl flow</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/0627" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0627</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having additional bores or grooves machined into the piston for guiding air or charge flow to the piston bowl</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/063" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the combustion space in the piston interacting fluid dynamically with the cylinder head, the injector body or the cylinder wall </text><reference><text><class-ref scheme="cpc">F02B23/04</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B23/0633" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0633</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the combustion space being almost completely enclosed in the piston, i.e. having a small inlet in comparison to its volume</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B23/0636" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0636</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the combustion space having a substantially flat and horizontal bottom</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/0639" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0639</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the combustion space having substantially the shape of a cylinder</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B23/0642" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0642</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the depth of the combustion space being much smaller than the diameter of the piston, e.g. the depth being in the order of one tenth of the diameter</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B23/0645" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0645</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details related to the fuel injector or the fuel spray</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/0648" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0648</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means or methods to improve the spray dispersion, evaporation or ignition</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F02B23/0651" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0651</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the fuel spray impinging on reflecting surfaces or being specially guided throughout the combustion space</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/0654" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0654</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Thermal treatments, e.g. with heating elements or local cooling</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F02B23/0657" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0657</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the spray interacting with one or more glow plugs</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/066" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the injector being located substantially off-set from the cylinder centre axis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/0663" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0663</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having multiple injectors per combustion chamber</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/0666" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0666</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a single fuel spray jet per injector nozzle</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/0669" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0669</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having multiple fuel spray jets per injector nozzle</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B23/0672" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0672</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis </text><reference><text>the surrounding wall being exactly vertical <class-ref scheme="cpc">F02B23/0696</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B23/0675" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>F02B23/0675</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>the combustion space being substantially spherical, hemispherical, ellipsoid or parabolic</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B23/0678" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0678</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/0681" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0681</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Square, rectangular or the like profiles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/0684" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0684</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ring like bowl, e.g. toroidal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/0687" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0687</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple bowls in the piston, e.g. one bowl per fuel spray jet</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/069" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/069</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by its eccentricity from the cylinder axis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/0693" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0693</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the combustion space consisting of step-wise widened multiple zones of different depth</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B23/0696" definition-exists="false" ipc-concordant="F02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/0696</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>W-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder wall</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B23/08" definition-exists="false" ipc-concordant="F02B23/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with positive ignition</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B23/085" definition-exists="false" ipc-concordant="F02B23/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2023/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using several spark plugs per cylinder</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B23/10" definition-exists="false" ipc-concordant="F02B23/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with separate admission of air and fuel into cylinder</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B23/101" definition-exists="false" ipc-concordant="F02B23/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/101</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the injector being placed on or close to the cylinder centre axis, e.g. with mixture formation using spray guided concepts</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B23/102" definition-exists="false" ipc-concordant="F02B23/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2023/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the spark plug being placed offset the cylinder centre axis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B23/103" definition-exists="false" ipc-concordant="F02B23/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2023/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the injector having a multi-hole nozzle for generating multiple sprays</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B23/104" definition-exists="false" ipc-concordant="F02B23/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/104</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the injector being placed on a side position of the cylinder</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B23/105" definition-exists="false" ipc-concordant="F02B23/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B23/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the fuel is sprayed directly onto or close to the spark plug</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B23/106" definition-exists="false" ipc-concordant="F02B23/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2023/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tumble flow, i.e. the axis of rotation of the main charge flow motion is horizontal</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B23/107" definition-exists="false" ipc-concordant="F02B23/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2023/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reverse tumble flow, e.g. having substantially vertical intake ports</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B23/108" definition-exists="false" ipc-concordant="F02B23/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2023/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Swirl flow, i.e. the axis of rotation of the main charge flow motion is vertical</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F02B25/00" date-revised="2021-01-01" status="published"><classification-symbol>F02B25/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by provision for charging or scavenging</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B25/00" definition-exists="true" ipc-concordant="F02B25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B25/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by using fresh charge for scavenging cylinders</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> - in this group the following indexing codes are used: <subnote><note-paragraph><class-ref scheme="cpc">F02B2700/02</class-ref> - <class-ref scheme="cpc">F02B2700/038</class-ref></note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B25/02" definition-exists="false" ipc-concordant="F02B25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B25/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using unidirectional scavenging</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B25/04" definition-exists="false" ipc-concordant="F02B25/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B25/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines having ports both in cylinder head and in cylinder wall near bottom of piston stroke</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B25/06" definition-exists="false" ipc-concordant="F02B25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B25/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the cylinder-head ports being controlled by working pistons, e.g. by sleeve-shaped extensions thereof</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B25/08" definition-exists="false" ipc-concordant="F02B25/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B25/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines with oppositely-moving reciprocating working pistons</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B25/10" definition-exists="false" ipc-concordant="F02B25/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B25/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with one piston having a smaller diameter or shorter stroke than the other</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B25/12" definition-exists="false" ipc-concordant="F02B25/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B25/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines with U-shaped cylinders, having ports in each arm</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B25/14" definition-exists="false" ipc-concordant="F02B25/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B25/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B25/145" definition-exists="false" ipc-concordant="F02B25/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B25/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with intake and exhaust valves exclusively in the cylinder head</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B25/16" definition-exists="false" ipc-concordant="F02B25/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B25/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the charge flowing upward essentially along cylinder wall opposite the inlet ports </text><CPC-specific-text><reference><text><class-ref scheme="cpc">F02B25/145</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B25/18" definition-exists="false" ipc-concordant="F02B25/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B25/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the charge flowing upward essentially along cylinder wall adjacent the inlet ports, e.g. by means of deflection rib on piston </text><CPC-specific-text><reference><text><class-ref scheme="cpc">F02B25/145</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B25/20" definition-exists="false" ipc-concordant="F02B25/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F02B25/20</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups <class-ref scheme="cpc">F02B25/02</class-ref> - <class-ref scheme="cpc">F02B25/18</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B25/22" definition-exists="false" ipc-concordant="F02B25/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B25/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by forming air cushion between charge and combustion residues</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B25/24" definition-exists="false" ipc-concordant="F02B25/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B25/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Inlet or outlet openings being timed asymmetrically relative to bottom dead-centre</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B25/26" definition-exists="false" ipc-concordant="F02B25/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B25/26</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Multi-cylinder engines other than those provided for in, or of interest apart from, groups <class-ref scheme="cpc">F02B25/02</class-ref> - <class-ref scheme="cpc">F02B25/24</class-ref> </text><reference><text>internal-combustion aspects of rotary engines <class-ref scheme="cpc">F02B57/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B25/28" definition-exists="false" ipc-concordant="F02B25/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B25/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with V-, fan-, or star-arrangement of cylinders</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B27/00" definition-exists="true" ipc-concordant="F02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B27/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B27/001" definition-exists="false" ipc-concordant="F02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the system having electrically controlled acoustic pulse generating devices, e.g. loudspeakers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B27/003" definition-exists="false" ipc-concordant="F02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using check valves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B27/005" definition-exists="false" ipc-concordant="F02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Oscillating pipes with charging achieved by arrangement, dimensions or shapes of intakes pipes or chambers; Ram air pipes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B27/006" definition-exists="false" ipc-concordant="F02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of intake runners</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B27/008" definition-exists="false" ipc-concordant="F02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Resonance charging</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B27/02" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means </text><reference><text>in exhaust systems only <class-ref scheme="cpc">F02B27/06</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B27/0205" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the charging effect</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B27/021" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Resonance charging </text><reference><text>combined with oscillating pipe charging <class-ref scheme="cpc">F02B27/0221</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B27/0215" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0215</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Oscillating pipe charging, i.e. variable intake pipe length charging</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B27/0221" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0221</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Resonance charging combined with oscillating pipe charging</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B27/0226" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0226</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the means generating the charging effect</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B27/0231" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0231</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Movable ducts, walls or the like </text><reference><text><class-ref scheme="cpc">F02B27/0257</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B27/0236" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0236</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with continuously variable adjustment of a length or width</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B27/0242" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fluid communication passages between intake ducts, runners or chambers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B27/0247" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plenum chambers; Resonance chambers or resonance pipes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B27/0252" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0252</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple plenum chambers or plenum chambers having inner separation walls, e.g. comprising valves for the same group of cylinders</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B27/0257" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0257</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rotatable plenum chambers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B27/0263" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the plenum chamber and at least one of the intake ducts having a common wall, and the intake ducts wrap partially around the plenum chamber, i.e. snail-type </text><reference><text><class-ref scheme="cpc">F02B27/0257</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B27/0268" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Valves</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B27/0273" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Flap valves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B27/0278" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-way valves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B27/0284" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rotary slide valves</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B27/0289" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0289</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Intake runners having multiple intake valves per cylinder</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B27/0294" definition-exists="false" ipc-concordant="F02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/0294</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Actuators or controllers therefor; Diagnosis; Calibration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B27/04" definition-exists="false" ipc-concordant="F02B27/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in exhaust systems only, e.g. for sucking-off combustion gases</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B27/06" definition-exists="false" ipc-concordant="F02B27/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B27/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B29/00" definition-exists="true" ipc-concordant="F02B29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F02B29/00</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Engines characterised by provision for charging or scavenging not provided for in groups <class-ref scheme="cpc">F02B25/00</class-ref>, <class-ref scheme="cpc">F02B27/00</class-ref> or <class-ref scheme="cpc">F02B33/00</class-ref> - <class-ref scheme="cpc">F02B39/00</class-ref></text></title-part><title-part><text>Details thereof</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B29/02" definition-exists="true" ipc-concordant="F02B29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B29/02</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Other fluid-dynamic features of induction systems for improving quantity of charge </text><reference><text>for also imparting a rotation to the charge in the cylinder <class-ref scheme="cpc">F02B31/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B29/04" definition-exists="true" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling of air intake supply</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B29/0406" definition-exists="false" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/0406</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Layout of the intake air cooling or coolant circuit</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B29/0412" definition-exists="false" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/0412</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple heat exchangers arranged in parallel or in series</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B29/0418" definition-exists="false" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/0418</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the intake air cooler having a bypass or multiple flow paths within the heat exchanger to vary the effective heat transfer surface</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B29/0425" definition-exists="false" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/0425</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Air cooled heat exchangers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B29/0431" definition-exists="false" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/0431</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details or means to guide the ambient air to the heat exchanger, e.g. having a fan, flaps, a bypass or a special location in the engine compartment</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B29/0437" definition-exists="false" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/0437</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Liquid cooled heat exchangers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B29/0443" definition-exists="false" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/0443</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Layout of the coolant or refrigerant circuit</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B29/045" definition-exists="false" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B29/0456" definition-exists="false" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/0456</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Air cooled heat exchangers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B29/0462" definition-exists="false" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/0462</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Liquid cooled heat exchangers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B29/0468" definition-exists="false" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/0468</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Water separation or drainage means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B29/0475" definition-exists="false" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/0475</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the intake air cooler being combined with another device, e.g. heater, valve, compressor, filter or EGR cooler, or being assembled on a special engine location</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B29/0481" definition-exists="false" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/0481</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Intake air cooling by means others than heat exchangers, e.g. by rotating drum regenerators, cooling by expansion or by electrical means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B29/0493" definition-exists="false" ipc-concordant="F02B29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/0493</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlling the air charge temperature</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B29/06" definition-exists="false" ipc-concordant="F02B29/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>After-charging, i.e. supplementary charging after scavenging</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B29/08" definition-exists="true" ipc-concordant="F02B29/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B29/08</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Modifying distribution valve timing for charging purposes </text><reference><text><class-ref scheme="cpc">F02B29/06</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B29/083" definition-exists="false" ipc-concordant="F02B29/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cyclically operated valves disposed upstream of the cylinder intake valve, controlled by external means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B29/086" definition-exists="false" ipc-concordant="F02B29/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B29/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the engine having two or more inlet valves</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B31/00" definition-exists="true" ipc-concordant="F02B31/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B31/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Modifying induction systems for imparting a rotation to the charge in the cylinder </text><reference><text>air intakes or induction systems for internal-combustion engines <class-ref scheme="cpc">F02M35/10</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B31/003" definition-exists="false" ipc-concordant="F02B31/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2031/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with an auxiliary intake conduit starting upstream of personally controlled throttle valve and ending upstream of and close to the intake valve, or with an auxiliary intake conduit being an independent passage, e.g. having its own carburettor</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B31/006" definition-exists="false" ipc-concordant="F02B31/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2031/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having multiple air intake valves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B31/02" definition-exists="false" ipc-concordant="F02B31/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B31/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in engines having inlet valves arranged eccentrically to cylinder axis</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B31/04" definition-exists="false" ipc-concordant="F02B31/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B31/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means within the induction channel, e.g. deflectors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B31/06" definition-exists="false" ipc-concordant="F02B31/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B31/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Movable means, e.g. butterfly valves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B31/08" definition-exists="false" ipc-concordant="F02B31/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F02B31/08</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>having multiple air inlets </text><CPC-specific-text><text>, i.e. having main and auxiliary intake passages</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B31/082" definition-exists="false" ipc-concordant="F02B31/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B31/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the main passage having a helical shape around the intake valve axis; Engines characterised by provision of driven charging or scavenging pumps </text><reference><text>introducing fuel into cylinders by air-pressure <class-ref scheme="cpc">F02B13/00</class-ref>; after-charging <class-ref scheme="cpc">F02B29/06</class-ref>; arrangements of such pumps or other auxiliary apparatus on engines <class-ref scheme="cpc">F02B67/00</class-ref>; combined engine pump control, control dependent on variables other than those generic to pump <class-ref scheme="cpc">F02D</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B31/085" definition-exists="false" ipc-concordant="F02B31/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B31/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having two inlet valves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B31/087" definition-exists="false" ipc-concordant="F02B31/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B31/087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having three or more inlet valves</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F02B33/00" date-revised="2021-01-01" status="published"><classification-symbol>F02B33/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by provision of driven charging or scavenging pumps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B33/00" definition-exists="true" ipc-concordant="F02B33/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B33/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by provision of pumps for charging or scavenging</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B33/02" definition-exists="false" ipc-concordant="F02B33/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines with reciprocating-piston pumps</text></title-part><title-part><text>Engines with crankcase pumps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B33/04" definition-exists="true" ipc-concordant="F02B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F02B33/04</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>with simple crankcase pumps, i.e. with the rear face of a non-stepped working piston acting as sole pumping member in co-operation with the crankcase</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B33/06" definition-exists="true" ipc-concordant="F02B33/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with reciprocating-piston pumps other than simple crankcase pumps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B33/08" definition-exists="true" ipc-concordant="F02B33/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with the working-cylinder head arranged between working and pumping cylinders</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B33/10" definition-exists="false" ipc-concordant="F02B33/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with the pumping cylinder situated between working cylinder and crankcase, or with the pumping cylinder surrounding working cylinder</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B33/12" definition-exists="true" ipc-concordant="F02B33/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the rear face of working piston acting as pumping member and co-operating with a pumping chamber isolated from crankcase, the connecting-rod passing through the chamber and co-operating with movable isolating member</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B33/14" definition-exists="true" ipc-concordant="F02B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>working and pumping pistons forming stepped piston</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B33/16" definition-exists="false" ipc-concordant="F02B33/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>working and pumping pistons having differing movements</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B33/18" definition-exists="true" ipc-concordant="F02B33/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with crankshaft being arranged between working and pumping cylinders</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B33/20" definition-exists="true" ipc-concordant="F02B33/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with pumping-cylinder axis arranged at an angle to working-cylinder axis, e.g. at an angle of 90 degrees</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B33/22" definition-exists="true" ipc-concordant="F02B33/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with pumping cylinder situated at side of working cylinder, e.g. the cylinders being parallel</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B33/24" definition-exists="false" ipc-concordant="F02B33/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with crankcase pumps other than with reciprocating pistons only</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B33/26" definition-exists="true" ipc-concordant="F02B33/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Four-stroke engines characterised by having crankcase pumps</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B33/28" definition-exists="false" ipc-concordant="F02B33/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F02B33/28</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Component parts, details or accessories of crankcase pumps, not provided for in, or of interest apart from, subgroups <class-ref scheme="cpc">F02B33/02</class-ref> - <class-ref scheme="cpc">F02B33/26</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B33/30" definition-exists="true" ipc-concordant="F02B33/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B33/30</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Control of inlet or outlet ports</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B33/32" definition-exists="true" ipc-concordant="F02B33/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines with pumps other than of reciprocating-piston type </text><reference><text>with crankcase pumps <class-ref scheme="cpc">F02B33/02</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B33/34" definition-exists="true" ipc-concordant="F02B33/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with rotary pumps </text><reference><text>with cell-type pressure exchangers or the like <class-ref scheme="cpc">F02B33/42</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B33/36" definition-exists="false" ipc-concordant="F02B33/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of positive-displacement type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B33/38" definition-exists="true" ipc-concordant="F02B33/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of Roots type</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B33/40" definition-exists="true" ipc-concordant="F02B33/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of non-positive-displacement type</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B33/42" definition-exists="true" ipc-concordant="F02B33/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B33/42</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>with driven apparatus for immediate conversion of combustion gas pressure into pressure of fresh charge, e.g. with cell-type pressure exchangers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B33/44" definition-exists="true" ipc-concordant="F02B33/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B33/44</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B33/443" definition-exists="false" ipc-concordant="F02B33/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/443</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Heating of charging air, e.g. for facilitating the starting</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B33/446" definition-exists="false" ipc-concordant="F02B33/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B33/446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having valves for admission of atmospheric air to engine, e.g. at starting</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B35/00" definition-exists="true" ipc-concordant="F02B35/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B35/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines characterised by provision of pumps for sucking combustion residues from cylinders</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B35/02" definition-exists="true" ipc-concordant="F02B35/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B35/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using rotary pumps</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B37/00" definition-exists="true" ipc-concordant="F02B37/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B37/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines characterised by provision of pumps driven at least for part of the time by exhaust</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B37/001" definition-exists="false" ipc-concordant="F02B37/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using exhaust drives arranged in parallel</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B37/002" definition-exists="false" ipc-concordant="F02B37/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the exhaust supply to one of the exhaust drives can be interrupted</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B37/004" definition-exists="false" ipc-concordant="F02B37/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with exhaust drives arranged in series</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B37/005" definition-exists="false" ipc-concordant="F02B37/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Exhaust driven pumps being combined with an exhaust driven auxiliary apparatus, e.g. a ventilator</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B37/007" definition-exists="true" ipc-concordant="F02B37/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F02B37/007</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>with exhaust-driven pumps arranged in parallel </text><CPC-specific-text><text>, e.g. at least one pump supplying alternatively</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B37/013" definition-exists="true" ipc-concordant="F02B37/013" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/013</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with exhaust-driven pumps arranged in series</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B37/02" definition-exists="false" ipc-concordant="F02B37/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gas passages between engine outlet and pump drive, e.g. reservoirs</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B37/025" definition-exists="false" ipc-concordant="F02B37/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple scrolls or multiple gas passages guiding the gas to the pump drive</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B37/04" definition-exists="true" ipc-concordant="F02B37/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B37/10" definition-exists="false" ipc-concordant="F02B37/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>at least one pump being alternatively </text><CPC-specific-text><text>or simultaneously</text></CPC-specific-text><text> driven by exhaust and other drive, </text><CPC-specific-text><text>e.g. by pressurised fluid from a reservoir or an engine-driven pump</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B37/105" definition-exists="false" ipc-concordant="F02B37/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>exhaust drive and pump being both connected through gearing to engine-driven shaft</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B37/11" definition-exists="false" ipc-concordant="F02B37/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>driven by other drive at starting only</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B37/12" definition-exists="true" ipc-concordant="F02B37/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of the pumps</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B37/122" definition-exists="false" ipc-concordant="F02B37/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2037/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control of rotational speed of the pump</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B37/125" definition-exists="false" ipc-concordant="F02B37/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2037/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control for avoiding pump stall or surge</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B37/14" definition-exists="true" ipc-concordant="F02B37/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control</text></CPC-specific-text><text> of the alternation between </text><CPC-specific-text><text>or the operation of</text></CPC-specific-text><text> exhaust drive and other drive of a pump, e.g. dependent on speed</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B37/16" definition-exists="true" ipc-concordant="F02B37/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>F02B37/16</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>by bypassing charging air</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B37/162" definition-exists="true" ipc-concordant="F02B37/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>F02B37/162</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>by bypassing, e.g. partially, intake air from pump inlet to pump outlet</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B37/164" definition-exists="false" ipc-concordant="F02B37/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/164</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the bypassed air being used in an auxiliary apparatus, e.g. in an air turbine</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B37/166" definition-exists="false" ipc-concordant="F02B37/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/166</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the auxiliary apparatus being a combustion chamber, e.g. upstream of turbine</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B37/168" definition-exists="true" ipc-concordant="F02B37/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>F02B37/168</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>into the exhaust conduit </text><reference><text><class-ref scheme="cpc">F02B37/166</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B37/18" definition-exists="true" ipc-concordant="F02B37/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by bypassing exhaust </text><CPC-specific-text><text>from the inlet to the outlet of turbine or to the atmosphere</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B37/183" definition-exists="true" ipc-concordant="F02B37/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/183</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements of bypass valves or actuators therefor</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B37/186" definition-exists="true" ipc-concordant="F02B37/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements of actuators or linkage for bypass valves</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B37/20" definition-exists="true" ipc-concordant="F02B37/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by increasing exhaust energy, e.g. using combustion chamber </text><CPC-specific-text><text>by after-burning </text><reference><text>using an auxiliary combustion chamber supplied by charging air <class-ref scheme="cpc">F02B37/166</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B37/22" definition-exists="true" ipc-concordant="F02B37/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B37/22</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>by varying cross-section of exhaust passages or air passages </text><CPC-specific-text><text>, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits</text></CPC-specific-text><text> </text><reference><text><class-ref scheme="cpc">F02B37/24</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B37/225" definition-exists="true" ipc-concordant="F02B37/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>air passages</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B37/24" definition-exists="true" ipc-concordant="F02B37/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B37/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using pumps or turbines with adjustable guide vanes</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B39/00" definition-exists="true" ipc-concordant="F02B39/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F02B39/00</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups <class-ref scheme="cpc">F02B33/00</class-ref> - <class-ref scheme="cpc">F02B37/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B39/005" definition-exists="true" ipc-concordant="F02B39/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B39/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cooling of pump drives</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B39/02" definition-exists="true" ipc-concordant="F02B39/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B39/02</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Drives of pumps </text><reference><text>exhaust drives or combined exhaust and other drives <class-ref scheme="cpc">F02B37/00</class-ref></text></reference></title-part><title-part><text>Varying pump drive gear ratio</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B39/04" definition-exists="true" ipc-concordant="F02B39/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B39/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mechanical drives</text></title-part><title-part><text>Variable-gear-ratio drives </text><reference><text>non-mechanical pump drives having variable gear ratio <class-ref scheme="cpc">F02B39/08</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B39/06" definition-exists="false" ipc-concordant="F02B39/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B39/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the engine torque being divided by a differential gear for driving a pump and the engine output shaft</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B39/08" definition-exists="false" ipc-concordant="F02B39/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B39/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-mechanical drives, e.g. fluid drives having variable gear ratio</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B39/085" definition-exists="false" ipc-concordant="F02B39/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B39/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the fluid drive using expansion of fluids other than exhaust gases, e.g. a Rankine cycle</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B39/10" definition-exists="false" ipc-concordant="F02B39/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B39/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electric</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B39/12" definition-exists="true" ipc-concordant="F02B39/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B39/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Drives characterised by use of couplings or clutches therein </text><reference><text>using fluid slip couplings for varying gear ratio <class-ref scheme="cpc">F02B39/08</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B39/14" definition-exists="true" ipc-concordant="F02B39/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B39/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lubrication of pumps</text></title-part><title-part><text>Safety measures therefor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B39/16" definition-exists="true" ipc-concordant="F02B39/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B39/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Other safety measures for, or other control of, pumps</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B39/162" definition-exists="false" ipc-concordant="F02B39/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2039/162</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control of pump parameters to improve safety thereof</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B39/164" definition-exists="false" ipc-concordant="F02B39/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2039/164</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the temperature of the pump, of the pump drive or the pumped fluid being limited</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B39/166" definition-exists="false" ipc-concordant="F02B39/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2039/166</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the fluid pressure in the pump or exhaust drive being limited</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B39/168" definition-exists="false" ipc-concordant="F02B39/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2039/168</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the rotational speed of pump or exhaust drive being limited</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B41/00" definition-exists="true" ipc-concordant="F02B41/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B41/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines characterised by special means for improving conversion of heat or pressure energy into mechanical power</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B41/02" definition-exists="true" ipc-concordant="F02B41/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B41/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines with prolonged expansion</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B41/04" definition-exists="true" ipc-concordant="F02B41/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B41/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in main cylinders</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B41/06" definition-exists="true" ipc-concordant="F02B41/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B41/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in compound cylinders</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B41/08" definition-exists="true" ipc-concordant="F02B41/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B41/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Two-stroke compound engines</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B41/10" definition-exists="true" ipc-concordant="F02B41/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B41/10</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>in exhaust turbines </text><reference><text>use of exhaust turbines for charging <class-ref scheme="cpc">F02B37/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B41/12" definition-exists="false" ipc-concordant="F02B41/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2041/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in jet propulsion apparatus</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F02B43/00" date-revised="2021-01-01" status="published"><classification-symbol>F02B43/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines operating on non-liquid fuels</text></title-part><title-part><text>Plants including such engines, i.e. combinations of the engine with fuel-generating apparatus</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B43/00" definition-exists="true" ipc-concordant="F02B43/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F02B43/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines characterised by operating on gaseous fuels</text></title-part><title-part><text>Plants including such engines </text><reference><text>engines characterised by the gas-air charge being ignited by compression ignition of an additional fuel <class-ref scheme="cpc">F02B7/06</class-ref>; engines convertible from gas to other fuel consumption <class-ref scheme="cpc">F02B69/04</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> - in this group the following indexing codes are used: <subnote><note-paragraph><class-ref scheme="cpc">F02B2700/02</class-ref> - <class-ref scheme="cpc">F02B2720/30</class-ref></note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B43/02" definition-exists="false" ipc-concordant="F02B43/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B43/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines characterised by means for increasing operating efficiency</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B43/04" definition-exists="false" ipc-concordant="F02B43/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B43/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for improving efficiency of combustion</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B43/06" definition-exists="false" ipc-concordant="F02B43/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B43/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for enlarging charge</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B43/08" definition-exists="false" ipc-concordant="F02B43/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B43/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Plants characterised by the engines using gaseous fuel generated in the plant from solid fuel, e.g. wood</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B43/10" definition-exists="true" ipc-concordant="F02B43/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B43/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B43/103" definition-exists="false" ipc-concordant="F02B43/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2043/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Natural gas, e.g. methane or LNG used as a fuel</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B43/106" definition-exists="false" ipc-concordant="F02B43/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2043/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hydrogen obtained by electrolysis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B43/12" definition-exists="true" ipc-concordant="F02B43/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B43/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of operating</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B45/00" definition-exists="true" ipc-concordant="F02B45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B45/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines characterised by operating on non-liquid fuels other than gas</text></title-part><title-part><text>Plants including such engines </text><reference><text>plants involving generation of gaseous fuel from solid fuel <class-ref scheme="cpc">F02B43/08</class-ref>; engines convertible from gas to other fuel consumption <class-ref scheme="cpc">F02B69/04</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B45/02" definition-exists="true" ipc-concordant="F02B45/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F02B45/02</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>operating on powdered fuel, e.g. powdered coal </text><reference><text>operating on fuel containing oxidant <class-ref scheme="cpc">F02B45/06</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B45/04" definition-exists="false" ipc-concordant="F02B45/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B45/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Plants, e.g. having coal-grinding apparatus</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B45/06" definition-exists="false" ipc-concordant="F02B45/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B45/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating on fuel containing oxidant</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B45/08" definition-exists="false" ipc-concordant="F02B45/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B45/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating on other solid fuels</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B45/10" definition-exists="false" ipc-concordant="F02B45/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B45/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating on mixtures of liquid and non-liquid fuels, e.g. in pasty or foamed state</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F02B47/00" date-revised="2021-01-01" status="published"><classification-symbol>F02B47/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Methods of operating engines involving specific pre-treating of, or adding specific substances to, combustion air, fuel or fuel-air mixture of the engines, and not otherwise provided for</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B47/00" definition-exists="true" ipc-concordant="F02B47/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B47/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B47/02" definition-exists="true" ipc-concordant="F02B47/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B47/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the substances being water or steam</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B47/04" definition-exists="false" ipc-concordant="F02B47/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B47/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the substances being other than water or steam only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B47/06" definition-exists="true" ipc-concordant="F02B47/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F02B47/06</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>the substances including non-airborne oxygen </text><reference><text><class-ref scheme="cpc">F02B47/10</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B47/08" definition-exists="true" ipc-concordant="F02B47/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B47/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the substances including exhaust gas</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B47/10" definition-exists="true" ipc-concordant="F02B47/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B47/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circulation of exhaust gas in closed or semi-closed circuits, e.g. with simultaneous addition of oxygen</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B49/00" definition-exists="true" ipc-concordant="F02B49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B49/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of operating air-compressing compression-ignition engines involving introduction of small quantities of fuel in the form of a fine mist into the air in the engine's intake</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B51/00" definition-exists="true" ipc-concordant="F02B51/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B51/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Other methods of operating engines involving pretreating of, or adding substances to, combustion air, fuel, or fuel-air mixture of the engines</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B51/02" definition-exists="true" ipc-concordant="F02B51/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B51/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving catalysts</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B51/04" definition-exists="true" ipc-concordant="F02B51/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B51/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving electricity or magnetism</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B51/06" definition-exists="true" ipc-concordant="F02B51/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B51/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving rays or sound waves</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F02B53/00" date-revised="2013-01-01" status="published"><classification-symbol>F02B53/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Internal-combustion aspects of rotary-piston or oscillating-piston engines</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B53/00" definition-exists="true" ipc-concordant="F02B53/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F02B53/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Internal-combustion aspects of rotary-piston or oscillating-piston engines </text><reference><text>internal-combustion aspects of rotary pistons or outer members for co-operation therewith <class-ref scheme="cpc">F02B55/00</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> - in this group the following indexing codes are used: <subnote><note-paragraph><class-ref scheme="cpc">F02B2730/01</class-ref> - <class-ref scheme="cpc">F02B2730/09</class-ref></note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B53/005" definition-exists="false" ipc-concordant="F02B53/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2053/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wankel engines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B53/02" definition-exists="false" ipc-concordant="F02B53/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B53/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of operating</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B53/04" definition-exists="false" ipc-concordant="F02B53/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B53/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Charge admission or combustion-gas discharge</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B53/06" definition-exists="false" ipc-concordant="F02B53/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B53/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Valve control therefor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B53/08" definition-exists="false" ipc-concordant="F02B53/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B53/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Charging, e.g. by means of rotary-piston pump</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B53/10" definition-exists="false" ipc-concordant="F02B53/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B53/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fuel supply</text></title-part><title-part><text>Introducing fuel to combustion space</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B53/12" definition-exists="false" ipc-concordant="F02B53/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B53/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ignition</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B53/14" definition-exists="false" ipc-concordant="F02B53/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B53/14</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Adaptations of engines for driving, or engine combinations with, other devices</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B55/00" definition-exists="true" ipc-concordant="F02B55/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B55/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Internal-combustion aspects of rotary pistons</text></title-part><title-part><text>Outer members for co-operation with rotary pistons</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B55/02" definition-exists="false" ipc-concordant="F02B55/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B55/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pistons</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B55/04" definition-exists="false" ipc-concordant="F02B55/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B55/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling thereof</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B55/06" definition-exists="false" ipc-concordant="F02B55/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B55/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by air or other gas</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B55/08" definition-exists="false" ipc-concordant="F02B55/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B55/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Outer members for co-operation with rotary pistons</text></title-part><title-part><text>Casings</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B55/10" definition-exists="true" ipc-concordant="F02B55/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B55/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling thereof</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B55/12" definition-exists="false" ipc-concordant="F02B55/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B55/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by air or other gas</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B55/14" definition-exists="false" ipc-concordant="F02B55/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B55/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shapes or constructions of combustion chambers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B55/16" definition-exists="false" ipc-concordant="F02B55/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B55/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Admission or exhaust passages in pistons or outer members</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F02B57/00" date-revised="2013-01-01" status="published"><classification-symbol>F02B57/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Internal-combustion aspects of reciprocating-piston engines with movable cylinders</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B57/00" definition-exists="true" ipc-concordant="F02B57/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B57/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Internal-combustion aspects of rotary engines in which the combusted gases displace one or more reciprocating pistons</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B57/02" definition-exists="true" ipc-concordant="F02B57/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B57/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fuel or combustion-air supply </text><reference><text>cylinder-charge admission or exhaust control <class-ref scheme="cpc">F02B57/04</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B57/04" definition-exists="true" ipc-concordant="F02B57/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B57/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of cylinder-charge admission or exhaust </text><reference><text>peculiar to two-stroke engines or to other engines with working-piston-controlled charge admission or exhaust <class-ref scheme="cpc">F02B57/06</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B57/06" definition-exists="true" ipc-concordant="F02B57/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B57/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Two-stroke engines or other engines with working-piston-controlled cylinder-charge admission or exhaust </text><reference><text>with combustion space in centre of star <class-ref scheme="cpc">F02B57/10</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B57/08" definition-exists="true" ipc-concordant="F02B57/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B57/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines with star-shaped cylinder arrangements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B57/085" definition-exists="false" ipc-concordant="F02B57/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B57/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having two parallel main shafts</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B57/10" definition-exists="true" ipc-concordant="F02B57/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B57/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with combustion space in centre of star</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B59/00" definition-exists="true" ipc-concordant="F02B59/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B59/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Internal-combustion aspects of other reciprocating-piston engines with movable, e.g. oscillating, cylinders </text><reference><text>with yieldable walls <class-ref scheme="cpc">F02B75/38</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F02B61/00" date-revised="2021-01-01" status="published"><classification-symbol>F02B61/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Adaptations of engines for special use</text></title-part><title-part><text>Combinations of engines with devices other than engine parts or auxiliaries</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B61/00" definition-exists="true" ipc-concordant="F02B61/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B61/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Adaptations of engines for driving vehicles or for driving propellers</text></title-part><title-part><text>Combinations of engines with gearing </text><reference><text>the engine torque being divided by a differential gear for driving a scavenging or charging pump and the engine output shaft <class-ref scheme="cpc">F02B39/06</class-ref>; adaptations or combinations of rotary-piston or oscillating-piston engines <class-ref scheme="cpc">F02B53/14</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B61/02" definition-exists="true" ipc-concordant="F02B61/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B61/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for driving cycles</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B61/04" definition-exists="true" ipc-concordant="F02B61/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B61/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for driving propellers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B61/045" definition-exists="true" ipc-concordant="F02B61/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B61/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for outboard marine engines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B61/06" definition-exists="true" ipc-concordant="F02B61/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B61/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Combinations of engines with mechanical gearing </text><reference><text><class-ref scheme="cpc">F02B61/02</class-ref>, <class-ref scheme="cpc">F02B61/04</class-ref> take precedence</text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B63/00" definition-exists="true" ipc-concordant="F02B63/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B63/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Adaptations of engines for driving pumps, hand-held tools or electric generators</text></title-part><title-part><text>Portable combinations of engines with engine-driven devices </text><reference><text>of rotary-piston or oscillating-piston engines <class-ref scheme="cpc">F02B53/14</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B63/02" definition-exists="false" ipc-concordant="F02B63/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B63/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for hand-held tools</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B63/04" definition-exists="true" ipc-concordant="F02B63/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B63/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for electric generators</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B63/041" definition-exists="false" ipc-concordant="F02B63/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B63/041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Linear electric generators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B63/042" definition-exists="false" ipc-concordant="F02B63/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B63/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rotating electric generators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B63/043" definition-exists="false" ipc-concordant="F02B63/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B63/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electric generators using oscillating movement</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B63/044" definition-exists="false" ipc-concordant="F02B63/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B63/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the engine-generator unit being placed on a frame or in an housing</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B63/045" definition-exists="false" ipc-concordant="F02B63/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2063/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Frames for generator-engine sets</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B63/046" definition-exists="false" ipc-concordant="F02B63/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2063/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Handles adapted therefor, e.g. handles or grips for movable units</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B63/047" definition-exists="false" ipc-concordant="F02B63/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B63/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Movable engine-generator combinations on wheels</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B63/048" definition-exists="false" ipc-concordant="F02B63/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B63/048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Portable engine-generator combinations</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B63/06" definition-exists="false" ipc-concordant="F02B63/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B63/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for pumps</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B65/00" definition-exists="true" ipc-concordant="F02B65/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B65/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Adaptations of engines for special uses not provided for in groups <class-ref scheme="cpc">F02B61/00</class-ref> or <class-ref scheme="cpc">F02B63/00</class-ref></text></title-part><title-part><text>Combinations of engines with other devices, e.g. with non-driven apparatus </text><reference><text>of rotary-piston or oscillating-piston engines <class-ref scheme="cpc">F02B53/14</class-ref>; combinations of prime-movers consisting of electric motors and internal combustion engines for mutual or common propulsion <class-ref scheme="cpc">B60K6/20</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F02B67/00" date-revised="2013-01-01" status="published"><classification-symbol>F02B67/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines with pertinent characteristics other than those provided for in or of interest apart from, preceding main groups</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B67/00" definition-exists="true" ipc-concordant="F02B67/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B67/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions</text></title-part><title-part><text>Driving auxiliary apparatus from engines, not otherwise provided for</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B67/04" definition-exists="false" ipc-concordant="F02B67/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B67/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of mechanically-driven auxiliary apparatus</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B67/06" definition-exists="true" ipc-concordant="F02B67/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B67/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>driven by means of chains, belts, or like endless members</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B67/08" definition-exists="true" ipc-concordant="F02B67/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B67/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of non-mechanically driven auxiliary apparatus</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B67/10" definition-exists="true" ipc-concordant="F02B67/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B67/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of charging or scavenging apparatus</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B69/00" definition-exists="true" ipc-concordant="F02B69/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B69/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Internal-combustion engines convertible into other combustion-engine type, not provided for in <class-ref scheme="cpc">F02B11/00</class-ref></text></title-part><title-part><text>Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B69/02" definition-exists="false" ipc-concordant="F02B69/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B69/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for different fuel types, other than engines indifferent to fuel consumed, e.g. convertible from light to heavy fuel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B69/04" definition-exists="false" ipc-concordant="F02B69/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B69/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for gaseous and non-gaseous fuels</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B69/06" definition-exists="false" ipc-concordant="F02B69/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B69/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for different cycles, e.g. convertible from two-stroke to four stroke</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B71/00" definition-exists="true" ipc-concordant="F02B71/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B71/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Free-piston engines</text></title-part><title-part><text>Engines without rotary main shaft</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B71/02" definition-exists="false" ipc-concordant="F02B71/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B71/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Starting</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B71/04" definition-exists="false" ipc-concordant="F02B71/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B71/04</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Adaptations of such engines for special use</text></title-part><title-part><text>Combinations of such engines with apparatus driven thereby</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B71/045" definition-exists="false" ipc-concordant="F02B71/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B71/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with hydrostatic transmission</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B71/06" definition-exists="false" ipc-concordant="F02B71/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B71/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Free-piston combustion gas generators <u>per se</u></text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B73/00" definition-exists="true" ipc-concordant="F02B73/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B73/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Combinations of two or more engines, not otherwise provided for</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B75/00" definition-exists="true" ipc-concordant="F02B75/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Other engines</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/002" definition-exists="true" ipc-concordant="F02B75/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Double acting engines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/005" definition-exists="true" ipc-concordant="F02B75/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having horizontal cylinders </text><reference><text><class-ref scheme="cpc">F02B75/007</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/007" definition-exists="true" ipc-concordant="F02B75/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having vertical crankshafts</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/02" definition-exists="true" ipc-concordant="F02B75/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines characterised by their cycles, e.g. six-stroke</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B75/021" definition-exists="false" ipc-concordant="F02B75/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having six or more strokes per cycle</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B75/022" definition-exists="false" ipc-concordant="F02B75/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having less than six strokes per cycle</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B75/023" definition-exists="false" ipc-concordant="F02B75/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>one</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B75/025" definition-exists="false" ipc-concordant="F02B75/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>two</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B75/026" definition-exists="false" ipc-concordant="F02B75/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>three</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B75/027" definition-exists="false" ipc-concordant="F02B75/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>four</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B75/028" definition-exists="false" ipc-concordant="F02B75/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>five</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/04" definition-exists="true" ipc-concordant="F02B75/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines with variable distances between pistons at top dead-centre positions and cylinder heads</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B75/041" definition-exists="true" ipc-concordant="F02B75/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of cylinder or cylinderhead positioning</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B75/042" definition-exists="false" ipc-concordant="F02B75/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the cylinderhead comprising a counter-piston</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B75/044" definition-exists="true" ipc-concordant="F02B75/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of an adjustable piston length</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B75/045" definition-exists="true" ipc-concordant="F02B75/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of a variable connecting rod length</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B75/047" definition-exists="true" ipc-concordant="F02B75/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of variable crankshaft position</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B75/048" definition-exists="true" ipc-concordant="F02B75/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of a variable crank stroke length</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/06" definition-exists="true" ipc-concordant="F02B75/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B75/06</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines with means for equalising torque</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B75/065" definition-exists="true" ipc-concordant="F02B75/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with double connecting rods or crankshafts</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/08" definition-exists="true" ipc-concordant="F02B75/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines with means for preventing corrosion in gas-swept spaces</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/10" definition-exists="true" ipc-concordant="F02B75/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B75/10</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Engines with means for rendering exhaust gases innocuous </text><reference><text>apparatus <u>per se</u> <class-ref scheme="cpc">F01N3/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/12" definition-exists="false" ipc-concordant="F02B75/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Other methods of operation</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B75/125" definition-exists="false" ipc-concordant="F02B75/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/16" definition-exists="false" ipc-concordant="F02B75/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines characterised by number of cylinders, e.g. single-cylinder engines </text><reference><text><class-ref scheme="cpc">F02B75/26</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B75/18" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multi-cylinder engines </text><reference><text>scavenging aspects <class-ref scheme="cpc">F02B25/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B75/1804" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1804</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Number of cylinders</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1808" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1808</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>two</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1812" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1812</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>three</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1816" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>four</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/182" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>five</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1824" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1824</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>six</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1828" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1828</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>seven</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1832" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1832</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>eight</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1836" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1836</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>nine</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/184" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/184</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ten</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1844" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1844</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>eleven</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1848" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1848</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>twelve</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1852" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1852</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>thirteen</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1856" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1856</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>fourteen</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/186" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>fifteen</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1864" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1864</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>sixteen</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1868" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1868</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>twenty</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1872" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1872</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>twenty-two</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1876" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1876</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>twenty-four</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/188" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/188</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>thirty</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1884" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1884</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>thirty-two</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1888" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1888</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>thirty-four</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F02B75/1892" definition-exists="false" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2075/1892</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>thirty-six</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B75/1896" definition-exists="true" ipc-concordant="F02B75/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/1896</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with two or more pistons connected to one crank and having a common combustion space</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B75/20" definition-exists="true" ipc-concordant="F02B75/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with cylinders all in one line</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B75/22" definition-exists="true" ipc-concordant="F02B75/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with cylinders in V, fan, or star arrangement</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B75/221" definition-exists="true" ipc-concordant="F02B75/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/221</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with cylinder banks in narrow V-arrangement, having a single cylinder head</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B75/222" definition-exists="true" ipc-concordant="F02B75/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with cylinders in star arrangement</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B75/224" definition-exists="true" ipc-concordant="F02B75/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/224</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with cylinders in fan arrangement</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B75/225" definition-exists="true" ipc-concordant="F02B75/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having two or more crankshafts</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B75/227" definition-exists="true" ipc-concordant="F02B75/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with cylinder banks in X-arrangement, e.g. double-V engines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B75/228" definition-exists="true" ipc-concordant="F02B75/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>F02B75/228</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>with cylinders arranged in parallel banks</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B75/24" definition-exists="false" ipc-concordant="F02B75/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with cylinders arranged oppositely relative to main shaft and of "flat" type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B75/243" definition-exists="true" ipc-concordant="F02B75/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/243</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with only one crankshaft of the "boxer" type, e.g. all connecting rods attached to separate crankshaft bearings</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F02B75/246" definition-exists="true" ipc-concordant="F02B75/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/246</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with only one crankshaft of the "pancake" type, e.g. pairs of connecting rods attached to common crankshaft bearing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/26" definition-exists="true" ipc-concordant="F02B75/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines with cylinder axes coaxial with, or parallel or inclined to, main-shaft axis</text></title-part><title-part><text>Engines with cylinder axes arranged substantially tangentially to a circle centred on main-shaft axis</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B75/265" definition-exists="true" ipc-concordant="F02B75/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Engines with cylinder axes substantially tangentially to a circle centred on main-shaft axis</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/28" definition-exists="true" ipc-concordant="F02B75/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders </text><reference><text>arranged oppositely relative to main shaft <class-ref scheme="cpc">F02B75/24</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B75/282" definition-exists="true" ipc-concordant="F02B75/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the pistons having equal strokes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B75/285" definition-exists="true" ipc-concordant="F02B75/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a free auxiliary piston</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B75/287" definition-exists="true" ipc-concordant="F02B75/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/287</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with several pistons positioned in one cylinder one behind the other</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B75/30" definition-exists="true" ipc-concordant="F02B75/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with one working piston sliding inside another</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/32" definition-exists="true" ipc-concordant="F02B75/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines characterised by connections between pistons and main shafts and not specific to preceding main groups</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/34" definition-exists="true" ipc-concordant="F02B75/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ultra-small engines, e.g. for driving models</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/36" definition-exists="true" ipc-concordant="F02B75/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>F02B75/36</classification-symbol><class-title date-revised="2017-05-01"><title-part><text>Engines with parts of combustion- or working-chamber walls resiliently yielding under pressure</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B75/38" definition-exists="true" ipc-concordant="F02B75/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reciprocating - piston engines </text><reference><text><class-ref scheme="cpc">F02B75/04</class-ref> takes precedence; with resiliently-urged auxiliary piston in pre-combustion chamber <class-ref scheme="cpc">F02B19/06</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B75/40" definition-exists="true" ipc-concordant="F02B75/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B75/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Other reciprocating-piston engines</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B77/00" definition-exists="true" ipc-concordant="F02B77/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Component parts, details or accessories, not otherwise provided for</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B77/005" definition-exists="false" ipc-concordant="F02B77/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plugs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B77/02" definition-exists="true" ipc-concordant="F02B77/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B77/02</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Surface coverings of combustion-gas-swept parts </text><reference><text>of pistons <class-ref scheme="cpc">F02F3/10</class-ref>; of cylinders and cylinder heads <class-ref scheme="cpc">F02F1/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B77/04" definition-exists="true" ipc-concordant="F02B77/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines </text><CPC-specific-text><reference><text>cleaning of fuel injection apparatus <class-ref scheme="cpc">F02M65/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B77/045" definition-exists="false" ipc-concordant="F02B77/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2077/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by flushing or rinsing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B77/06" definition-exists="false" ipc-concordant="F02B77/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2077/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements of purifying apparatus for liquid fuel or lubricant filters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B77/08" definition-exists="true" ipc-concordant="F02B77/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Safety, indicating or supervising devices </text><reference><text>thermal insulation <class-ref scheme="cpc">F02B77/11</class-ref>; </text><CPC-specific-text><text>rendering engines inoperative or idling <class-ref scheme="cpc">F02D17/04</class-ref>; dependent on lubricating conditions <class-ref scheme="cpc">F01M1/22</class-ref>; dependent on cooling <class-ref scheme="cpc">F01P11/14</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B77/081" definition-exists="true" ipc-concordant="F02B77/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>relating to endless members </text><reference><text>endless members, e.g. belts, for driving auxiliary apparatus <class-ref scheme="cpc">F02B67/04</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B77/082" definition-exists="true" ipc-concordant="F02B77/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>relating to valves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B77/083" definition-exists="true" ipc-concordant="F02B77/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>relating to maintenance, e.g. diagnostic device </text><reference><text>relating to lubrication <class-ref scheme="cpc">F01M11/10</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B77/084" definition-exists="true" ipc-concordant="F02B77/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>indicating economy</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B77/085" definition-exists="true" ipc-concordant="F02B77/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F02B77/086" definition-exists="true" ipc-concordant="F02B77/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sensor arrangements in the exhaust, e.g. for temperature, misfire, air/fuel ratio, oxygen sensors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B77/087" definition-exists="true" ipc-concordant="F02B77/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>determining top dead centre or ignition-timing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B77/088" definition-exists="true" ipc-concordant="F02B77/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>relating to tightness</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B77/089" definition-exists="true" ipc-concordant="F02B77/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/089</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>relating to engine temperature </text><reference><text>concerning coolant temperature <class-ref scheme="cpc">F01P11/16</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B77/10" definition-exists="true" ipc-concordant="F02B77/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Safety means relating to crankcase explosions</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B77/11" definition-exists="true" ipc-concordant="F02B77/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Thermal or acoustic insulation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F02B77/13" definition-exists="true" ipc-concordant="F02B77/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Acoustic insulation</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F02B77/14" definition-exists="true" ipc-concordant="F02B77/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B77/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engine-driven auxiliary devices combined into units</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F02B79/00" definition-exists="true" ipc-concordant="F02B79/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F02B79/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Running-in of internal-combustion engines </text><reference><text>lubrication thereof <class-ref scheme="cpc">F01M7/00</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="F02B201/00" date-revised="2013-01-01" status="published"><classification-symbol>F02B2201/00</classification-symbol>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F02B201/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2201/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fuels</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B201/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2201/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquid</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B201/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2201/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gas</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B201/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2201/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dual fuel applications</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B201/062" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2201/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquid and liquid</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B201/0622" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2201/0622</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquid and liquefied gas</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B201/064" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2201/064</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquid and gas</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B201/066" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2201/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gas and gas</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F02B275/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>F02B2275/00</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Other engines, components or details, not provided for in other groups of this subclass</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Attachment or mounting of cylinder heads on cylinders</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Endless member is a belt</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Endless member is a chain</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diamond configuration of valves in cylinder heads</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Direct injection into combustion chamber</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indirect injection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>DOHC [Double overhead camshaft]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>SOHC [Single overhead camshaft]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Side valves</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Flame plate</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/28" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Timing distribution gear</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Inverted positioning of engines</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Miller cycle</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lateral camshaft position</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/36" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modified dwell of piston in TDC</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/38" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Square four-cylinder configuration</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Squish effect</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B275/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2275/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Texaco combustion process</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/157" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/157</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with means for improving the mixture in the cylinder</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/158" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/158</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with an auxiliary cylinder in which an explosion is generated</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B720/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mixture compressing engines with ignition by compression or other heat</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B720/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Air compressing engines with ignition by the heat of compression</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B720/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Four stroke engines</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/221" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/221</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with measures for removing exhaust gases from the cylinder</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/223" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/223</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with measures for charging, increasing the power</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/225" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with measures for compressing the cylinder charge</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/226" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/226</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with measures for improving combustion</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/228" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/228</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with measures for increasing the part of the heat transferred to power, compound engines</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B720/23" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/23</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Two stroke engines</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/231" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/231</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with measures for removing exhaust gases from the cylinder</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B720/232" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/232</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of the exhaust gases</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/233" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/233</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with measures for charging, increasing the power</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/235" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/235</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with reservoir for scavenging or charging air</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/236" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/236</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>scavenging or charging channels or openings</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/237" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/237</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with measures for improving combustion</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/238" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/238</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with measures for increasing the part of the heat transferred to power, compound engines</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B720/25" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/25</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supply of fuel in the cylinder</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/251" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/251</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fuel supply by high pressure gas</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B720/252" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/252</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with air pump fixed to engine cylinder</text></title-part><title-part><text>high pressure air being taken from the atmosphere or from an engine cylinder</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B720/253" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/253</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with high pressure air reservoir close to the point of injection</text></title-part><title-part><text>high pressure air taken from the engine cylinder</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B720/255" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/255</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with mixture compressing pump</text></title-part><title-part><text>fuel-air mixture being compressed in the pump cylinder without self ignition</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B720/256" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/256</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using steam or other gas as high pressure gas</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/257" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/257</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supply of fuel under pressure in the cylinder without blowing fluid</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B720/258" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/258</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with compression and ignition exclusively in the cylinder</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B720/27" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/27</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Air compressing engines with hot-bulb ignition</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/272" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/272</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supply of all the fuel into the prechamber</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B720/274" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/274</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with injection of all the fuel into the prechamber</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B720/276" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/276</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supply of only a part of the fuel into the prechamber</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B720/278" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/278</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with injection of only a part of the fuel into the prechamber</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B720/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2720/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Engines with air compression and ignition device</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F02B730/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2730/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Internal combustion engines with pistons rotating or oscillating with relation to the housing</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B730/01" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2730/01</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with one or more pistons in the form of a disk or rotor rotating with relation to the housing</text></title-part><title-part><text>with annular working chamber</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B730/011" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2730/011</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with vanes sliding in the housing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B730/012" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2730/012</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with vanes sliding in the piston</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F02B730/013" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2730/013</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vanes fixed in the centre of the housing</text></title-part><title-part><text>Excentric rotors</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B730/015" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2730/015</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with vanes hinged to the housing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B730/016" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2730/016</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with vanes hinged to the piston</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B730/017" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2730/017</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with rotating elements fixed to the housing or on the piston</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B730/018" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2730/018</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with piston rotating around an axis passing through the gravity centre, this piston or the housing rotating at the same time around an axis parallel to the first axis</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B730/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2730/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with piston rotating around its axis and having a reciprocating movement in a cylinder</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B730/03" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2730/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with piston oscillating in a housing or in a space in the form of an annular sector</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B730/05" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2730/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with pistons intermeshing as gear wheels</text></title-part><title-part><text>with helicoidal rotors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F02B730/09" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>F02B2730/09</classification-symbol><class-title date-revised="2017-05-01"><title-part><text>Arrangements or specially formed elements for engines according to the preceding groups</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F02B730/095" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F02B2730/095</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hydraulic pistons</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></class-scheme> |