Apparatus for controlling a flow of evaporated fuel from a canis

Details Apparatus for controlling a flow of evaporated fuel from a canis Apparatus for controlling a flow of evaporated fuel from a canis

1993-06-25

1994-11-29

Miller, Carl S.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123198D, F02M 3704

Patent

active

053680022

ABSTRACT:
An evaporated fuel purge control apparatus includes a purge control valve arranged in a purge passage between a canister and an intake passage of an engine, the purge control valve being switched on and off in accordance with a control factor, the control factor indicating a duty ratio of an on-time of the purge control valve within a duty cycle to a total duty-cycle time, a detecting part for detecting an operating condition under which the engine is operating, and a flow rate control part for setting a control factor for the purge control valve in accordance with the operating condition detected by the detecting part, the control factor set by the flow rate control part allowing a flow rate of evaporated fuel fed from the canister into the intake passage through the purge control valve to be maintained at a constant level when the operating condition of the engine changes.

REFERENCES:
patent: 3913545 (1975-10-01), Haase
patent: 4664087 (1987-05-01), Hamborg
patent: 4748959 (1988-06-01), Cook
patent: 4951637 (1990-08-01), Cook
patent: 4977881 (1990-12-01), Abe
patent: 4995369 (1991-02-01), Cook
patent: 5027780 (1991-07-01), Uranishi
patent: 5226398 (1993-07-01), Cook
patent: 5263460 (1993-11-01), Baxter

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