Engine fuel vapor processor

Details Engine fuel vapor processor Engine fuel vapor processor

1995-07-11

1997-06-10

Miller, Carl S.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123516, F02M 3302

Patent

active

056366175

ABSTRACT:
Fuel vapor in a fuel tank of a vehicle is adsorbed in a canister, released from the canister under negative intake pressure while a vehicle is being driven, and supplied to an engine intake passage. A valve is provided in a purge passage extending from the canister to the intake passage. Liquefied fuel is prevented from accumulating in the valve and purge passage by situating this valve at a higher position than a first connecting part connecting the canister with the purge passage, and a second connecting part connecting the purge passage with the intake passage. In this way, faulty operation of the valve due to the accumulated fuel turning to gum is prevented, richness of the air-fuel ratio due to accumulated fuel when purge starts is prevented, and impairment of engine drivability and exhaust gas composition are prevented.

REFERENCES:
patent: 3491736 (1970-01-01), Walker
patent: 4809667 (1989-03-01), Vranishi
patent: 5113824 (1992-05-01), Aramaki
patent: 5191870 (1993-03-01), Cook
patent: 5469832 (1995-11-01), Nemoto
patent: 5474049 (1995-12-01), Nagaishi

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