Control device for internal combustion engine

Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...

Reexamination Certificate

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Details

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.

REFERENCES:
patent: 2002/0038177 (2002-03-01), Ishikawa et al.
patent: 2005/0204726 (2005-09-01), Lewis
patent: 2005/0284133 (2005-12-01), Kerns et al.
patent: 697 28 325 (2004-08-01), None
patent: 61-104137 (1986-05-01), None
patent: 63-195351 (1988-08-01), None
patent: 2000-097081 (2000-04-01), None
patent: 2001-304018 (2001-10-01), None
patent: 2002-070625 (2002-03-01), None
patent: 2002-227690 (2002-08-01), None
patent: 2004-044444 (2004-02-01), None
patent: 2005-248914 (2005-09-01), None

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