Air/fuel ratio control apparatus

Details Air/fuel ratio control apparatus Air/fuel ratio control apparatus

1995-05-04

1997-04-29

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123520, 123698, 123674, F02D 4114, F02M 2508

Patent

active

056239149

ABSTRACT:
Fuel vapor is produced in a fuel tank and absorbed in a canister. The absorbed fuel vapor is purged through a purge passage into an engine induction passage under predetermined engine operating conditions. The air/fuel ratio is learned for air/fuel ratio feedback control. The learning control is inhibited when the fuel temperature exceeds a reference value during the air/fuel ratio feedback control. In another aspect of the invention, a purge valve is provided in the purge passage. The air/fuel ratio correction factor is set at an initial value in response to a movement of a purge valve from its open position toward its closed position.

REFERENCES:
patent: 5469833 (1995-11-01), Hara et al.

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