Carburetor for internal combustion engines

Details Carburetor for internal combustion engines Carburetor for internal combustion engines

1979-04-30

1981-08-11

Miles, Tim R.

Gas and liquid contact apparatus

Fluid distribution

Liquid supply tank

261DIG67, 123519, F02M 508

Patent

active

042833566

ABSTRACT:
A carburetor for internal combustion engines includes an inner vent passage through which the space on the free surface of liquid fuel in a float chamber is communicated with the intake passage of the carburetor and an outer vent passage through which the space in the float chamber is communicated with a charcoal canister adapted to store the fuel vapor coming from the space in the float chamber. A valve is movable between a first position in which the inner vent passage is closed and the outer vent passage is opened and a second position in which the inner vent passage is opened and the outer vent passage is closed. A pressure responsive valve actuator is operative in response to the vacuum in the intake passage to normally bias the valve to the first position and to move the valve to the second position when a vacuum is established in the intake passage. A further valve is diposed to control the connection and disconnection between the pressure responsive valve actuator and the intake passage. The further valve interrupts, when the throttle valve reaches a predetermined opening degree, the communication of the valve actuator and the intake passage so as to maintain the valve actuator in the state in which it is subjected to the vacuum which has been derived from the intake passage, thereby to retain the first-mentioned valve in the second position.

REFERENCES:
patent: 2568987 (1951-09-01), Brunner
patent: 3273871 (1966-09-01), Winkler
patent: 3548797 (1970-12-01), Higihara et al.
patent: 3618581 (1971-11-01), Simonet
patent: 3852381 (1974-12-01), Mick
patent: 4058978 (1977-11-01), Bockelmann
patent: 4062910 (1977-12-01), Rogerson et al.
patent: 4124662 (1978-11-01), Morita
patent: 4157366 (1979-06-01), Ruth et al.

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