Method of controlling tank venting in an internal combustion eng

Details Method of controlling tank venting in an internal combustion eng Method of controlling tank venting in an internal combustion eng

1986-05-22

1987-11-10

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123520, F02M 3900

Patent

active

047050071

ABSTRACT:
In a method and apparatus for controlling tank venting in internal combustion engines, a regenerative flow of fuel is released from the activated charcoal container to the negative-pressure side of the intake tube of the engine and an adaptation in the computer area for the fuel metering quantity simultaneously is prohibited, or vice versa, an adaptation is authorized and a regenerative fuel flow is prohibited, by cyclical triggering, as a function of whether the throttle flap angle drops below, or exceeds, a predetermined threshold value. Parallel to this, a continuous activated charcoal filter regeneration is provided that comes into play at relatively large air throughputs, by means of a branch line leading into the air filter area upstream of the throttle flap; furthermore, if the throttle flap angle threshold value is exceeded, both the regenerative fuel flow via the tank venting valve and the adaptation in the computer area are authorized.

REFERENCES:
patent: 3675634 (1972-07-01), Tatsutomi
patent: 3680318 (1972-08-01), Nakajima
patent: 4000727 (1977-01-01), Walker
patent: 4318383 (1982-03-01), Iritani
patent: 4326489 (1982-04-01), Heitert
patent: 4467769 (1984-08-01), Matsumura
patent: 4527532 (1985-07-01), Fasai

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