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

2005-01-11

2005-01-11

Mohanty, Bibhu (Department: 3747)

Internal-combustion engines

Engine speed regulator

Charge proportion varying

C123S673000

Reexamination Certificate

active

06840214

ABSTRACT:
An air-fuel ratio control apparatus for controlling an air-fuel ratio of an air-fuel mixture to be supplied to an internal combustion engine having a plurality of cylinders so that the air-fuel ratio coincides with a target air-fuel ratio. An air-fuel ratio is detected by an air-fuel ratio sensor provided at a position downstream of a joining portion of an exhaust manifold connected to the plurality of cylinders. Model parameters of a controlled object model defined by a relation between an air-fuel ratio detected by the air-fuel ratio sensor and a fuel supply amount parameter that specifies a fuel supply amount to each cylinder of the engine. A degree of differences between air-fuel ratios of air-fuel mixtures to be supplied to the plurality of cylinders is determined according to the identified model parameters.

REFERENCES:
patent: 6327850 (2001-12-01), Yasui et al.
patent: 6370473 (2002-04-01), Yasui et al.
patent: 10-54279 (1998-02-01), None
patent: 11-73206 (1999-03-01), None

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