Misfire detecting device of an internal combustion engine

Details Misfire detecting device of an internal combustion engine Misfire detecting device of an internal combustion engine

1991-05-07

1992-07-07

Myracle, Jerry W.

Measuring and testing

Vehicle chassis

Steering

73115, G01M 1500

Patent

active

051272628

ABSTRACT:
A misfire detecting device of an internal combustion engine comprises a pressure detector(s) for detecting an inner cylinder pressure of the engine, a crank angle detector for detecting a crank angle, and a misfire detector for detecting a misfire based on signals from the pressure detector and the crank angle detector. The misfire detector judges that the engine is under a misfire, when a comparison is made between a first integrated value of an indicated inner cylinder pressure before a predetermined crank angle of a combustion cycle of the engine and a second integrated value of the indicated inner cylinder pressure after the predetermined crank angle, and when there is a difference between the first value and the second value by less than a predetermined value.

REFERENCES:
patent: 4403505 (1983-09-01), Hattori et al.
patent: 4567755 (1986-02-01), Ootsuka et al.
patent: 5056487 (1991-10-01), Yamakado et al.

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