Air-fuel ratio control device for internal combustion engine

Details Air-fuel ratio control device for internal combustion engine Air-fuel ratio control device for internal combustion engine

2006-09-12

2006-09-12

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S276000, C123S19800E, C123S481000

Reexamination Certificate

active

07104047

ABSTRACT:
An integral operation in an upstream target-value varying part is stopped in response to transition to a fuel cutoff state to maintain an integral value concerning a downstream side. Thereafter, at a time of removal of the fuel cutoff state, a cumulative-air-intake-amount detecting part detects a cumulative air amount of air taken into an engine. Then, when the cumulative air amount reaches a predetermined air amount, an integral-operation-stop/restart controlling part restarts the integral operation in the upstream target-value varying part to update integral values concerning the downstream side in a time sequence.

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