Air-fuel ratio control apparatus of internal combustion engine

Details Air-fuel ratio control apparatus of internal combustion engine Air-fuel ratio control apparatus of internal combustion engine

2007-03-30

2008-12-16

Huynh, Hai H (Department: 3747)

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

C123S520000

Reexamination Certificate

active

07464698

ABSTRACT:
There is provided an air-fuel ratio control apparatus of an internal combustion engine capable of learning an air-fuel ratio and performing purge at the same time. When purge is being performed, in an air-fuel ratio learning routine, an air-fuel ratio deviation between an air-fuel ratio detected by an air-fuel ratio sensor and a target air-fuel ratio is computed by the use of a fuel vapor concentration detected in a concentration detection routine and then a learning correction value flaf to correct the computed air-fuel ratio deviation is computed.

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