Control device for internal combustion engine

Details Control device for internal combustion engine Control device for internal combustion engine

2006-12-28

2010-12-07

Denion, Thomas E (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S277000, C060S299000

Reexamination Certificate

active

07845160

ABSTRACT:
Provided is a control device for an internal combustion engine, which can enable stable and fine control of an average air/fuel ratio of an exhaust gas on the upstream side of a catalyst. The control device for an internal combustion engine includes: a catalytic converter; an upstream O2sensor to the upstream of the catalyst; a downstream O2sensor to the downstream of the catalyst; a first air/fuel ratio feedback control unit for controlling the air/fuel ratio of the exhaust gas based on an output value of the upstream O2sensor and a controlling constant group; a second air/fuel ratio feedback control unit for calculating a target average air/fuel ratio AFAVEobj based on the output value of the upstream O2sensor and an output target value VR2; and a conversion unit for calculating at least two controlling constants by using the target average air/fuel ratio AFAVEobj as a common index.

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