IPC 6 English version F02M !A-F02M 15/06

F02M-F02M01506

SECTION F– MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F 02

COMBUSTION ENGINES (cyclically operating valves therefor, lubricating, exhausting, or silencing engines F 01); HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

F 02 M

SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF (charging such engines F 02 B)

Notes

(1)

In this subclass, the following terms or expressions are used with the meanings indicated:

–

"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;

–

"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;

–

"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;

–

"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.

(2)

Attention is drawn to the Notes preceding class F 01.

Carburettors (for gaseous fuels F 02 M 21/00; combined with low-pressure fuel-injection apparatus F 02 M 71/00)

Carburettors with means for facilitating engine's starting or its idling below operational temperatures

the means to facilitate starting or idling being chokes for enriching fuel-air mixture (automatic chokes F 02 M 1/08)

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

having axially-movable valves, e.g. piston-shaped

the means to facilitate starting or idling becoming operative or inoperative automatically (in connection with auxiliary carburetting apparatus F 02 M 1/04)

dependent on engine temperature, e.g. having thermostat

with means for electrically heating thermostat

dependent on pressure in combustion-air- or fuel-air-mixture intake (F 02 M 1/10 takes precedence)

Other means for enriching fuel-air mixture during starting; Priming cups; using different fuels for starting and normal operation

Enriching fuel-air mixture by depressing float to flood carburettor

Idling devices (with means for facilitating idling below operational temperatures F 02 M 1/00)

Preventing flow of idling fuel

under conditions where engine is driven instead of driving, e.g. driven by vehicle running down hill

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]

Pneumatic or mechanical control, e.g. with speed regulation [4]

055

Fuel flow cut-off by introducing air, e.g. brake air, into the idling fuel system [4]

Increasing idling speed

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]

Other details of idling devices (fighting ice-formation by heating idling ports F 02 M 15/02)

Valves responsive to engine conditions, e.g. manifold vacuum (F 02 M 1/00, F 02 M 5/00 to F 02 M 33/00 take precedence) [5]

Fuel metering pins; Nozzles [4]

Passage way systems [4]

Location of idling system outlet relative to throttle valve [4]

Float-controlled apparatus for maintaining a constant fuel level

with provisions to meet variations in carburettor position, e.g. upside-down position in aircraft

with pivotally or rotatably mounted float chambers [4]

having adjustable float mechanism, e.g. to meet dissimilarities in specific gravity of different fuels

having means for venting float chambers

having means for preventing vapour lock, e.g. insulated float chambers or forced fuel circulation through float chamber with engine stopped

Other details, e.g. floats, valves, setting devices or tools (floats in general F 16 K 33/00)

Floats [4]

Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions (choke valves for starting F 02 M 1/00)

Carburettors having aerated fuel spray nozzles (with valve control for amount of air for aerating fuel F 02 M 7/24)

Means for enriching charge at high combustion-air flow

Means for enriching charge on sudden throttle opening, i.e. at acceleration, e.g. storage means in passage way system

using pumps

087

changing output according to temperature in engine [4]

093

changing output according to intake vacuum [4]

Other installations, without moving parts, for influencing fuel/air ratio, e.g. electrical means (F 02 M 7/23 takes precedence) [4]

Altering float-chamber pressure (enriching the fuel-air mixture during starting by depressing float to flood carburettor F 02 M 1/18) [5]

Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves (F 02 M 7/24 takes precedence) [4]

127

Altering the float-chamber pressure (enriching the fuel-air mixture during starting by depressing float to flood carburettor F 02 M 1/18) [5]

133

Auxiliary jets, i.e. operating only under certain conditions, e.g. full power (F 02 M 7/04, F 02 M 7/06 take precedence) [5]

with means for controlling cross-sectional area of fuel spray nozzle (dependent on air-throttle valve position F 02 M 7/22)

operated automatically, e.g. dependent on exhaust-gas analysis

by a pneumatically adjustable piston-like element, e.g. constant depression carburettors [5]

with means for controlling cross-sectional area of fuel-metering orifice (dependent on air-throttle position F 02 M 7/22)

operated automatically, e.g. dependent on altitude

fuel flow cross-sectional area being controlled dependent on air-throttle-valve position (the throttle valve being slidably arranged transversely to air passage F 02 M 9/06)

Fuel aerating devices [4]

Controlling flow of aerating air [4]

dependent on position of optionally operable throttle means [4]

dependent on temperature or pressure [4]

Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type (register-type carburettors F 02 M 11/00); Carburettors having fuel-air mixing chambers of variable shape or position

having throttling valves, e.g. of piston shape, slidably arranged transversely to the passage

with throttling valves sliding in a plane inclined to the passage

with means for varying cross-sectional area of fuel spray nozzle dependent on throttle position (F 02 M 7/17 takes precedence) [5]

having throttling valves rotatably mounted in the passage

having valves, or like controls, of elastic-wall type for controlling the passage, or for varying cross-sectional area, of fuel-air mixing chambers

having other specific means for controlling the passage, or for varying cross-sectional area, of fuel-air mixing chambers

127

Axially movable throttle valves concentric with the axis of the mixture passage [5]

133

the throttle valves having mushroom-shaped bodies [5]

having venturi and nozzle relatively displaceable essentially along the venturi axis

11/

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

11/

with throttling valve, e.g. of flap or butterfly type, in a later stage opening automatically

11/

the later-stage valves having damping means

11/

Other carburettors with throttling valve of flap or butterfly type

11/

13/

Arrangements of two or more separate carburettors (apparatus for testing, tuning, or synchronising carburettors F 02 M 19/01; re-atomising condensed fuel or homogenising fuel-air mixture F 02 M 29/00); Carburettors using more than one fuel (apparatus for adding small quantities of secondary fuel F 02 M 25/00)

13/

Separate carburettors

13/

structurally united

13/

the carburettors using different fuels

13/

Carburettors adapted to use liquid and gaseous fuels, e.g. alternatively

15/

Carburettors with heating, cooling, or thermal insulating means for combustion-air, fuel, or fuel-air mixture (heating, cooling, or thermally insulating float apparatus F 02 M 5/00; apparatus for thermally treating combustion-air, fuel, or fuel-air mixture, not being part of a carburettor F 02 M 31/00)

15/

with heating means, e.g. to combat ice-formation

15/

the means being electrical

15/

Heat shieldings, e.g. from engine radiations

F02M 17/00 - F02M 29/14