Apparatus for disposing of fuel vapor

Details Apparatus for disposing of fuel vapor Apparatus for disposing of fuel vapor

1995-03-30

1996-08-13

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02D 4114, F02M 2508

Patent

active

055446388

ABSTRACT:
Fuel-vapor evaporating from a fuel tank 13 is led through a vapor pipe 133 and absorbed in a charcoal canister 14. When a large amount of fuel is trapped in the charcoal canister, the learning of the basic air-fuel ratio correction factor executed in the control system 15 is interrupted in order to avoid faulty learning and the purging of fuel from the charcoal canister to the engine is continued in order to ensure sufficient fuel-purging. Only when a small amount of fuel is trapped in the charcoal canister, and the engine is driving in the region where the basic air-fuel ratio correction factor has not been learned, its learning is executed.

REFERENCES:
patent: 5048492 (1991-09-01), Davenport et al.
patent: 5090388 (1992-02-01), Hamburg et al.
patent: 5245978 (1993-09-01), Orzel
patent: 5363830 (1994-11-01), Morikawa
patent: 5400761 (1995-03-01), Fukasawa et al.
patent: 5406927 (1995-04-01), Kato et al.
patent: 5425349 (1995-06-01), Nagaishi et al.

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