Control system for internal combustion engine

Details Control system for internal combustion engine Control system for internal combustion engine

2005-09-13

2005-09-13

Argenbright, Tony M. (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C123S690000, C701S109000

Reexamination Certificate

active

06941936

ABSTRACT:
A control system for an internal combustion engine having at least one control device that affects an air-fuel ratio of an air-fuel mixture to be supplied to the engine, is disclosed. An air-fuel ratio correction coefficient is calculated for correcting an amount of fuel to be supplied to the engine so that the detected air-fuel ratio coincides with a target air-fuel ratio. An air-fuel ratio affecting parameter indicative of a degree of influence that an operation of the control device exercises upon the air-fuel ratio, is calculated. A correlation parameter which defines a correlation between the air-fuel ratio correction coefficient and the air-fuel ratio affecting parameter is calculated using a sequential statistical processing algorithm. A learning correction coefficient relating to a change in characteristics of the control device is calculated using the correlation parameter. The air-fuel ratio is controlled using the air-fuel ratio correction coefficient and the learning correction coefficient.

REFERENCES:
patent: 5710578 (1998-01-01), Beauregard et al.
patent: 6449943 (2002-09-01), Ueno et al.
patent: 2003/0089357 (2003-05-01), Takizawa et al.
patent: 198 55 495 (1998-01-01), None
patent: 63173838 (1988-07-01), None
patent: 7-180615 (1995-07-01), None
patent: 2576481 (1996-11-01), None

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