Control apparatus for an internal combustion engine

Details Control apparatus for an internal combustion engine Control apparatus for an internal combustion engine

2007-02-06

2007-02-06

Solis, Erick (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C123S520000, C123S472000

Reexamination Certificate

active

11411807

ABSTRACT:
A control apparatus for an internal combustion engine prevents variation of an air fuel ratio even upon introduction of purge air. A delay time occurring until the intake air detected, after having arrived at the combustion chamber through a surge tank, influences an air fuel ratio sensor, a delay time occurring until purge air containing evaporated fuel generated upon purging a canister, after having arrived at the combustion chamber through the surge tank, influences the air fuel ratio sensor, and a delay time occurring until fuel supplied by an injector, after having arrived at the combustion chamber, influences the air fuel ratio sensor, are represented by simplified physical models. A purge rate in the combustion chamber or in the neighborhood of the air fuel ratio sensor is calculated by using the physical models, and a purge air concentration and a fuel correction amount are calculated based on the purge rate thus obtained.

REFERENCES:
patent: 5626122 (1997-05-01), Azuma
patent: 6321735 (2001-11-01), Grieve et al.
patent: 6523531 (2003-02-01), Feldkamp et al.
patent: 6666200 (2003-12-01), Davis et al.
patent: 6722347 (2004-04-01), Sanchez et al.
patent: 3376172 (2002-11-01), None
patent: 3409891 (2003-03-01), None
patent: 3511722 (2004-01-01), None

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