| IPC 7 English version |
| F02M-F02M01506 |
F02M 17/00 - F02M 29/14  |
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| SECTION F – MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING |
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| F 02 | COMBUSTION ENGINES (cyclically operating valves therefor, lubricating, exhausting, or silencing engines F01); HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS |
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| F 02 M | SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF (charging such engines F02B) |
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| Notes |
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| (1) | In this subclass, the following terms or expressions are used with the meanings indicated: |
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| – | "carburettors" means essentially apparatus for mixing fuel with air, the fuel being brought into mixing contact with the air by lowering the air pressure, e.g. in a venturi; |
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| – | "fuel-injection apparatus" means apparatus for introducing fuel into a space, e.g. engine cylinder, by pressurising the fuel, e.g. by a pump acting behind the fuel, and thus includes the so-called "solid-fuel injection" in which liquid fuel is introduced without any admixture of gas; |
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| – | "low-pressure fuel injection" means fuel injection in which the fuel-air mixture containing fuel thus injected will be substantially compressed in the compression stroke of the engine; |
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| – | "pumping element" means a single piston-cylinder unit in a reciprocating-piston fuel-injection pump or the equivalent unit in any other type of fuel-injection pump. |
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| (2) | Attention is drawn to the Notes preceding class F01. |
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| Subclass Index |
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| SUPPLYING WITH LIQUID FUEL |
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| Carburettors |
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| starting, idling; float-controlled fuel level; mixture control; throttling, mixing chambers |
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| heating, cooling, insulating |
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| multi-stage, register type; combinations of carburettors or fuels; combination with low-pressure injection |
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| other characteristics; other details, or accessories |
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| Injection apparatus |
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| general characteristics, injection without gas |
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| with two or more sequentially-fed injectors; with two or more liquids |
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| with cyclic delivery characteristics; with fluid-actuated valves |
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| with pump or injector actuated by cylinder pressure or by the piston |
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| electrically-operated |
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| with heating, cooling, or insulating means; characterised by fuel pipes or venting means |
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| injectors combined with other devices |
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| arrangements of apparatus relative to engine, related pump drives |
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| other adaptations of pumps; other injectors |
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| other apparatus, details, or accessories |
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| testing |
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| using high-pressure gas |
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| low-pressure apparatus |
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| SUPPLYING WITH NON-LIQUID FUEL |
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| FEEDING OR PRETREATING AIR, FUEL, OR FUEL-AIR MIXTURE |
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| Pre-treating fuel, air, or mixture |
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| adding secondary air; adding non-fuel substances or secondary fuel |
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| by catalytic, electrical, or magnetic means, or by sound or radiation; thermally |
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| by re-atomising or homogenising; air cleaning; other treatment |
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| Air intakes or silencers, induction systems |
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| Fuel transfer to carburettors or injection apparatus |
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| Carburettors (for gaseous fuels F02M 21/00; combined with low-pressure fuel-injection apparatus F02M 71/00) |
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1/ | 00 | Carburettors with means for facilitating engine's starting or its idling below operational temperatures |
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1/ | 02 | . | the means to facilitate starting or idling being chokes for enriching fuel-air mixture (automatic chokes F02M 1/08) |
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1/ | 04 | . | the means to facilitate starting or idling being auxiliary carburetting apparatus able to be put into, and out of, operation, e.g. having automatically-operated disc valves |
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1/ | 06 | . | . | having axially-movable valves, e.g. piston-shaped |
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1/ | 08 | . | the means to facilitate starting or idling becoming operative or inoperative automatically (in connection with auxiliary carburetting apparatus F02M 1/04) |
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1/ | 10 | . | . | dependent on engine temperature, e.g. having thermostat |
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1/ | 12 | . | . | . | with means for electrically heating thermostat |
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1/ | 14 | . | . | dependent on pressure in combustion-air- or fuel-air-mixture intake (F02M 1/10 takes precedence) |
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1/ | 16 | . | Other means for enriching fuel-air mixture during starting; Priming cups; using different fuels for starting and normal operation |
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1/ | 18 | . | . | Enriching fuel-air mixture by depressing float to flood carburettor |
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3/ | 00 | Idling devices (with means for facilitating idling below operational temperatures F02M 1/00) |
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3/ | 02 | . | Preventing flow of idling fuel |
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3/ | 04 | . | . | under conditions where engine is driven instead of driving, e.g. driven by vehicle running down hill |
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3/ | 045 | . | . | . | Control of valves situated in the idling nozzle system, or the passage system, by electrical means or by a combination of electrical means with fluidic or mechanical means [4] |
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3/ | 05 | . | . | . | Pneumatic or mechanical control, e.g. with speed regulation [4] |
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3/ | 055 | . | . | . | Fuel flow cut-off by introducing air, e.g. brake air, into the idling fuel system [4] |
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3/ | 06 | . | Increasing idling speed |
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3/ | 07 | . | . | by positioning the throttle flap stop, or by changing the fuel flow cross-sectional area, by electrical, electromechanical or electropneumatical means, according to engine speed [4] |
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3/ | 08 | . | Other details of idling devices (fighting ice-formation by heating idling ports F02M 15/02) |
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3/ | 09 | . | . | Valves responsive to engine conditions, e.g. manifold vacuum (F02M 1/00, F02M 5/00 to F02M 33/00 take precedence) [5] |
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3/ | 10 | . | . | Fuel metering pins; Nozzles [4] |
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3/ | 12 | . | . | Passage way systems [4] |
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3/ | 14 | . | . | Location of idling system outlet relative to throttle valve [4] |
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5/ | 00 | Float-controlled apparatus for maintaining a constant fuel level |
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5/ | 02 | . | with provisions to meet variations in carburettor position, e.g. upside-down position in aircraft |
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5/ | 04 | . | . | with pivotally or rotatably mounted float chambers [4] |
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5/ | 06 | . | having adjustable float mechanism, e.g. to meet dissimilarities in specific gravity of different fuels |
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5/ | 08 | . | having means for venting float chambers |
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5/ | 10 | . | having means for preventing vapour lock, e.g. insulated float chambers or forced fuel circulation through float chamber with engine stopped |
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5/ | 12 | . | Other details, e.g. floats, valves, setting devices or tools (floats in general F16K 33/00) |
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5/ | 16 | . | . | Floats [4] |
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7/ | 00 | Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions (choke valves for starting F02M 1/00) |
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7/ | 02 | . | Carburettors having aerated fuel spray nozzles (with valve control for amount of air for aerating fuel F02M 7/24) |
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7/ | 04 | . | Means for enriching charge at high combustion-air flow |
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7/ | 06 | . | Means for enriching charge on sudden throttle opening, i.e. at acceleration, e.g. storage means in passage way system |
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7/ | 08 | . | . | using pumps |
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7/ | 087 | . | . | . | changing output according to temperature in engine [4] |
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7/ | 093 | . | . | . | changing output according to intake vacuum [4] |
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7/ | 10 | . | Other installations, without moving parts, for influencing fuel/air ratio, e.g. electrical means (F02M 7/23 takes precedence) [4] |
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7/ | 11 | . | . | Altering float-chamber pressure (enriching the fuel-air mixture during starting by depressing float to flood carburettor F02M 1/18) [5] |
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7/ | 12 | . | Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves (F02M 7/24 takes precedence) [4] |
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7/ | 127 | . | . | Altering the float-chamber pressure (enriching the fuel-air mixture during starting by depressing float to flood carburettor F02M 1/18) [5] |
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7/ | 133 | . | . | Auxiliary jets, i.e. operating only under certain conditions, e.g. full power (F02M 7/04, F02M 7/06 take precedence) [5] |
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7/ | 14 | . | . | with means for controlling cross-sectional area of fuel spray nozzle (dependent on air-throttle valve position F02M 7/22) |
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7/ | 16 | . | . | . | operated automatically, e.g. dependent on exhaust-gas analysis |
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7/ | 17 | . | . | . | . | by a pneumatically adjustable piston-like element, e.g. constant depression carburettors [5] |
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7/ | 18 | . | . | with means for controlling cross-sectional area of fuel-metering orifice (dependent on air-throttle position F02M 7/22) |
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7/ | 20 | . | . | . | operated automatically, e.g. dependent on altitude |
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7/ | 22 | . | . | fuel flow cross-sectional area being controlled dependent on air-throttle-valve position (the throttle valve being slidably arranged transversely to air passage F02M 9/06) |
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7/ | 23 | . | Fuel aerating devices [4] |
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7/ | 24 | . | . | Controlling flow of aerating air [4] |
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7/ | 26 | . | . | . | dependent on position of optionally operable throttle means [4] |
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7/ | 28 | . | . | . | dependent on temperature or pressure [4] |
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9/ | 00 | Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type (register-type carburettors F02M 11/00); Carburettors having fuel-air mixing chambers of variable shape or position |
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9/ | 02 | . | having throttling valves, e.g. of piston shape, slidably arranged transversely to the passage |
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9/ | 04 | . | . | with throttling valves sliding in a plane inclined to the passage |
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9/ | 06 | . | . | with means for varying cross-sectional area of fuel spray nozzle dependent on throttle position (F02M 7/17 takes precedence) [5] |
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9/ | 08 | . | having throttling valves rotatably mounted in the passage |
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9/ | 10 | . | having valves, or like controls, of elastic-wall type for controlling the passage, or for varying cross-sectional area, of fuel-air mixing chambers |
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9/ | 12 | . | having other specific means for controlling the passage, or for varying cross-sectional area, of fuel-air mixing chambers |
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9/ | 127 | . | . | Axially movable throttle valves concentric with the axis of the mixture passage [5] |
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9/ | 133 | . | . | . | the throttle valves having mushroom-shaped bodies [5] |
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9/ | 14 | . | having venturi and nozzle relatively displaceable essentially along the venturi axis |
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11/ | 00 | Multi-stage carburettors; Register-type carburettors, i.e. with slidable or rotatable throttling valves in which a plurality of fuel nozzles, other than only an idling nozzle and a main one, are sequentially exposed to air stream by throttling valve |
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11/ | 02 | . | with throttling valve, e.g. of flap or butterfly type, in a later stage opening automatically |
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11/ | 04 | . | . | the later-stage valves having damping means |
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11/ | 06 | . | Other carburettors with throttling valve of flap or butterfly type |
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11/ | 08 | . | Register carburettors with throttling valve movable transversally to air passage |
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11/ | 10 | . | Register carburettors with rotatable throttling valves |
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13/ | 00 | Arrangements of two or more separate carburettors (apparatus for testing, tuning, or synchronising carburettors F02M 19/01; re-atomising condensed fuel or homogenising fuel-air mixture F02M 29/00); Carburettors using more than one fuel (apparatus for adding small quantities of secondary fuel F02M 25/00) |
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13/ | 02 | . | Separate carburettors |
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13/ | 04 | . | . | structurally united |
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13/ | 06 | . | the carburettors using different fuels |
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13/ | 08 | . | Carburettors adapted to use liquid and gaseous fuels, e.g. alternatively |
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15/ | 00 | Carburettors with heating, cooling, or thermal insulating means for combustion-air, fuel, or fuel-air mixture (heating, cooling, or thermally insulating float apparatus F02M 5/00; apparatus for thermally treating combustion-air, fuel, or fuel-air mixture, not being part of a carburettor F02M 31/00) |
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15/ | 02 | . | with heating means, e.g. to combat ice-formation |
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15/ | 04 | . | . | the means being electrical |
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15/ | 06 | . | Heat shieldings, e.g. from engine radiations |
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 | F02M 17/00 - F02M 29/14 |
