Fuel valve for air-vapor mixer

Details Fuel valve for air-vapor mixer Fuel valve for air-vapor mixer

1983-01-14

1987-10-13

Richman, Barry S.

Gas: heating and illuminating

Mixers

48184, 123180T, 123578, 261 393, 261 502, F02M 110, F02M 722

Patent

active

046996303

ABSTRACT:
An improved fuel valve for an air-vapor mixer device for the fuel supply system of an internal combustion engine with which it is in thermal contact is disclosed. The valve operates in a fuel metering orifice and is composed of an acetal copolymer resin having a high coefficient of expansion. When the valve is cool, the metering orifice provides a richer mixture of fuel to air for cold starting and idling. As the engine warms up, the fuel valve expands through thermal contact with the engine and as a result of its high coefficient of expansion decreases the effective size of the orifice to lean the mixture and thereby provide better fuel economy and reduced pollutants. For mid-range control the fuel valve has a section of generally frustoconical configuration provided with circumferential steps that lean out mid-range mixtures for average operating conditions and produce an optimal admixture of fuel and air.

REFERENCES:
patent: 821081 (1906-05-01), Brennan
patent: 1929973 (1933-10-01), Daley
patent: 3719322 (1973-03-01), Gifford
patent: 4360481 (1982-11-01), Kaufman
LPF Carburetion, Inc., LPF Carburetor model L/No. L-734900000, parts list.

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