Evaporated fuel treatment device of an engine

Details Evaporated fuel treatment device of an engine Evaporated fuel treatment device of an engine

1997-08-07

1999-08-31

Solis, Erick R.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123520, F02M 3302

Patent

active

059440031

ABSTRACT:
An evaporated fuel treatment device comprising a purge control valve for controlling an amount of fuel vapor fed into the intake passage from a charcoal canister. The drive pulse of the purge control valve is controlled by a duty ratio. When the engine is idling, if the air-fuel ratio becomes rich, the speed of increase of the duty ratio of the drive pulse of the purge control valve is restricted to less than a predetermined speed.

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patent: 5143040 (1992-09-01), Okawa et al.
patent: 5150686 (1992-09-01), Okawa et al.
patent: 5216998 (1993-06-01), Hosoda et al.
patent: 5497757 (1996-03-01), Osanai
patent: 5546917 (1996-08-01), Osanai et al.
patent: 5727537 (1998-03-01), Nakagawa et al.

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