Cylinder-by-cylinder air-fuel ratio controller for internal...

Details Cylinder-by-cylinder air-fuel ratio controller for internal... Cylinder-by-cylinder air-fuel ratio controller for internal...

2007-03-27

2007-03-27

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C060S276000, C701S109000

Reexamination Certificate

active

11410298

ABSTRACT:
During a learning mode period, the fuel correction coefficient is forcibly changed three times from a situation in which no correction is necessary, whereby the fuel injection quantity of each cylinder is forcibly changed three times. A cross-correlation between the estimated air-fuel ratio and the fuel correction coefficient, which are calculated based on the detected value of the air-fuel ratio sensor every 60° CA, is evaluated to learn a deviation of the air-fuel ratio detecting timing from the appropriate value.

REFERENCES:
patent: 5806506 (1998-09-01), Kitamura et al.
patent: 7024302 (2006-04-01), Mizuno et al.
patent: 7051725 (2006-05-01), Ikemoto et al.
patent: 2005/0022797 (2005-02-01), Ikemoto et al.
patent: 2005/0075781 (2005-04-01), Mizuno et al.
patent: 2001-140685 (2001-05-01), None

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