Air-fuel ratio control apparatus for internal combustion engine

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

2006-08-29

2006-08-29

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...

C060S277000

Reexamination Certificate

active

07096663

ABSTRACT:
In an exhaust system of an internal combustion engine, an air-fuel ratio sensor is located upstream of a three-way catalyst. An oxygen sensor is located downstream of the catalyst. An ECU performs feedback control of the amount of fuel based on output of the air-fuel ratio sensor such that the engine air-fuel ratio seeks a stoichiometric air-fuel ratio. The ECU also performs sub-feedback control for correcting the amount of fuel in the feed back control based on output of the oxygen sensor. The ECU learns a learning value for compensating for a stationary difference between the engine air-fuel ratio and the stoichiometric air-fuel ratio based on a sub-feedback correction value. When learning of the learning value is performed after the learning value is cleared, a slip control by a lockup clutch is inhibited until the learning is stabilized.

REFERENCES:
patent: 5875628 (1999-03-01), Mitsutani
patent: 6227033 (2001-05-01), Kainz
patent: 2002/0038544 (2002-04-01), Ikemoto et al.
patent: 61-028739 (1986-02-01), None
patent: 06-286503 (1994-10-01), None
patent: 06-307274 (1994-11-01), None
patent: 08-284715 (1996-10-01), None
patent: 08284715 (1996-10-01), None
patent: 09-068077 (1997-03-01), None
patent: 09-292019 (1997-11-01), None
patent: 2001-059412 (2001-03-01), None
patent: 2001-090583 (2001-04-01), None

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