Carburetor with automatic choking and acceleration device

Details Carburetor with automatic choking and acceleration device Carburetor with automatic choking and acceleration device

1979-10-12

1981-06-30

Miles, Tim R.

Gas and liquid contact apparatus

Fluid distribution

Valved

261 44C, 261121B, 123179G, F02M 110

Patent

active

042762383

ABSTRACT:
A carburetor is disclosed of the variable venturi type, which has a bypass passage bypassing the throttle valve, which is controlled during starting and warming up of the engine by a piston which adjusts its flow resistance, and which is urged against the biasing action of a spring by the vacuum suction downstream of the throttle valve. The maximum open position of this piston is controlled by a heat-sensitive element which advances this position in the direction of closing the bypass passage as the engine warms up, until it is completely closed when the engine is warm. Air is fed into a supplier which supplies fuel to the carburetor inlet passage to mix with the fuel supplied thereby in an amount which varies from a minimum when the vacuum downstream of the throttle valve is minimum to a maximum when the vacuum downstream of the throttle valve is maximum. Further, the amount of fuel supplied by the fuel supplier is adjusted to be greater when the engine temperature is lower than when it is higher. Thereby choking action is provided for a cold engine, and also a function of providing an enriched mixture upon acceleration during warming up is provided.

REFERENCES:
patent: 3278173 (1966-10-01), Cook et al.
patent: 3493217 (1970-02-01), Farley
patent: 3670709 (1972-06-01), Eckert et al.
patent: 3764120 (1973-10-01), Imai
patent: 3885545 (1975-05-01), Charron et al.
patent: 3897765 (1975-08-01), Harrison et al.
patent: 3917760 (1975-11-01), Swatman
patent: 3967610 (1976-07-01), Ross
patent: 4102315 (1978-07-01), Fahim et al.
patent: 4180533 (1979-12-01), Bonse

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