Misfire detector for multi-cylinder engine

Details Misfire detector for multi-cylinder engine Misfire detector for multi-cylinder engine

2007-06-26

2007-06-26

Argenbright, T. M. (Department: 3747)

Internal-combustion engines

Spark ignition timing control

Electronic control

C123S406470, C123S481000, C123S674000, C123S687000

Reexamination Certificate

active

11289111

ABSTRACT:
A misfire detector prevents catalysts from being heated to damaging high temperatures. The misfire detector for a multi-cylinder engine includes a fuel cut control to stop supplying fuel to misfiring cylinders, a control to prevent a fuel feed back control and a fuel learning control and to initialize the correction values of both the fuel feed back control and the fuel learning control, and a retard control to retard the ignition timing based on the extent that misfire occurs or the air-fuel ratio. The retard control can be replaced by a throttle opening control for misfire to limit the throttle opening angle. The retard control can also be replaced by an engine or vehicle speed control to limit the engine or vehicle speed below a predetermined engine or vehicle speed, respectively, irrespective of the throttle position.

REFERENCES:
patent: 4979481 (1990-12-01), Shimomura et al.
patent: 05-010180 (1993-01-01), None
patent: 09-217642 (1997-08-01), None
patent: 2000-265893 (2000-09-01), None
patent: 2002-138894 (2002-05-01), None

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