Apparatus for disposing of fuel vapor

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

1995-03-16

1996-08-20

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123698, F02D 4114, F02M 2508

Patent

active

055469175

ABSTRACT:
Fuel-vapor evaporating from a fuel tank is led through a vapor pipe and absorbed in a charcoal canister. Fuel-vapor stored in the charcoal canister is supplied to an inlet pipe when a purge valve is opened when the engine is driven, because the pressure in the inlet pipe is low. Fuel-vapor is then burned as fuel in the engine. If the opening of the purge valve is suddenly increased at the start of the purge, the air fuel ratio control is disturbed. Therefore, the purge rate is gradually increased and the vapor concentration of the fuel-vapor purged from the charcoal canister is learned, and the change rate of the purge rate is made small because the air-fuel ratio control may be disturbed when the vapor concentration is not learned enough.

REFERENCES:
patent: 5048493 (1991-09-01), Orzel et al.
patent: 5090388 (1992-02-01), Hamburg et al.
patent: 5245978 (1993-09-01), Orzel
patent: 5257613 (1993-11-01), Monda et al.

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