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...

2006-06-20

2006-06-20

Argenbright, T. M. (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C701S109000

Reexamination Certificate

active

07063080

ABSTRACT:
An air-fuel ratio sensor detects an air-fuel ratio of an exhaust gas at a confluent portion of an exhaust gas. An air-fuel ratios in each cylinder are estimated to be controlled based on an output of the air-fuel ratio sensor. A computer determines whether an air-fuel detecting timing deviates according to a dispersion of the estimated air-fuel ratio among cylinders. When the deviation is detected, the air-fuel ratio detecting timing is varied to estimate an air-fuel ratio before and after correcting amount of fuel. The air-fuel ratio detecting timing is adapted as a proper timing when the variation amount of the estimated air-fuel ratio before and after the correction of fuel amount corresponds to the correct amount of fuel.

REFERENCES:
patent: 5636621 (1997-06-01), Maki et al.
patent: 5657736 (1997-08-01), Maki et al.
patent: 5806506 (1998-09-01), Kitamura et al.
patent: 6188953 (2001-02-01), Yasui et al.
patent: 6499474 (2002-12-01), Wachi et al.
patent: 6-200809 (1994-07-01), None

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