Internal combustion engine with air-fuel mixture heating

Details Internal combustion engine with air-fuel mixture heating Internal combustion engine with air-fuel mixture heating

F - Mech Eng,Light,Heat,Weapons

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F02M 31/08 (2006.01) F02M 31/04 (2006.01) F02M 31/087 (2006.01)

Patent

CA 1212283

Internal Combustion Engine With Air-Fuel Mixture Heating Abstract An internal combustion engine (1) includes a supple- mental fuel passage (26, 27) which connects the carburetor (9) to the exhaust chest cover (28). A supplemental air inlet having a metering orifice (36) and passage (35) connects to the supplemental fuel passage. The resultant air-fuel mixture is heated before entry into the combustion chamber by passing the mixture through a heating passage (32) directly in front of the exhaust ports (13). When the engine is at idle with a completely closed throttle valve (19), the entire air-fuel supply for the engine is provided through the supplemental fuel and air passages and is heated in the heating passage prior to combustion. At increasingly open throttle, air-fuel is increasingly provided from the conventional primary carburetor output, with the heated air-fuel mixture being supplied in gradually decreasing amounts.

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