(0)F02M:0/7:
IPC6
SECTION F - MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS;BLASTING
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE...
F02M
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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)
 

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/ 00 Carburettors with means for facilitating engine's starting or its idling below operational temperatures

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

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/ 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  

1
/ 06 • • having axially-movable valves, e.g. piston-shaped  

1
/ 08 • the means to facilitate starting or idling becoming operative or inoperative automatically (in connection with auxiliary carburetting apparatus F 02 M 1/04)  

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/ 10 • • dependent on engine temperature, e.g. having thermostat  

1
/ 12 • • • with means for electrically heating thermostat  

1
/ 14 • • dependent on pressure in combustion-air- or fuel-air-mixture intake (F 02 M 1/10 takes precedence)  

1
/ 16 • Other means for enriching fuel-air mixture during starting; Priming cups; using different fuels for starting and normal operation  

1
/ 18 • • Enriching fuel-air mixture by depressing float to flood carburettor  
 

 3
/ 00 Idling devices (with means for facilitating idling below operational temperatures F 02 M 1/00)

3
/ 02 • Preventing flow of idling fuel  

3
/ 04 • • under conditions where engine is driven instead of driving, e.g. driven by vehicle running down hill  

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]  

3
/ 05 • • • Pneumatic or mechanical control, e.g. with speed regulation [4]  

3
/ 055 • • • Fuel flow cut-off by introducing air, e.g. brake air, into the idling fuel system [4]  

3
/ 06 • Increasing idling speed  

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]  

3
/ 08 • Other details of idling devices (fighting ice-formation by heating idling ports F 02 M 15/02)  

3
/ 09 • • 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]  

3
/ 10 • • Fuel metering pins; Nozzles [4]  

3
/ 12 • • Passage way systems [4]  

3
/ 14 • • Location of idling system outlet relative to throttle valve [4]  
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