Evaporated fuel treatment device of an engine

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

1997-07-21

1998-09-15

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

P02D 4100

Patent

active

058065075

ABSTRACT:
An evaporated fuel treatment device comprising a purge control valve arranged between a canister and an intake passage of an engine. A drive pulse of the purge control valve is controlled by a duty ratio. When the purge action starts, the duty ratio is gradually increased. When the amount of the intake air is large other than at engine idling, the purge action is started. After the purge action is started, the purge action is performed even during engine idling.

REFERENCES:
patent: 5611320 (1997-03-01), Hara et al.
patent: 5657737 (1997-08-01), Ishida et al.
patent: 5682869 (1997-11-01), Nankee, II et al.
patent: 5694911 (1997-12-01), Kawamoto et al.

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