Apparatus for detection and decision of occurrence of misfire in

Details Apparatus for detection and decision of occurrence of misfire in Apparatus for detection and decision of occurrence of misfire in

1993-01-27

1994-11-01

Raevis, Robert

Measuring and testing

Vehicle chassis

Steering

G01M 1500

Patent

active

053598822

ABSTRACT:
An apparatus for deciding occurrence of misfire in an internal combustion engine comprises an angle sensor for generating a reference position signal corresponding to a predetermined crank angle of an engine cylinder, a sensor for detecting a running state of the engine, an ion current detector for detecting combustion state in the engine cylinder, a control parameter setting means for setting a control parameter of the engine on the basis of the reference position signal and the running state, a misfire detector for generating a misfire detection signal indicative of occurrence of misfire in the engine on the basis of detection output of the ion current detector, a misfire interval counter for measuring as a misfire interval an interval at which the misfire detection signal is generated, a misfire decision means for generating a misfire decision signal when the misfire interval becomes shorter than a predetermined interval. The control parameter setting means corrects the control parameters on the basis of the misfire decision signal to thereby suppress the occurrence of misfire. A high degree of reliability can be assured in the decision of misfire occurrence without the need for complicated and expensive decision logic.

REFERENCES:
patent: 3908366 (1975-09-01), Masaki
patent: 4762106 (1988-08-01), Blauhut
patent: 5088318 (1992-02-01), Osawa
patent: 5095742 (1992-03-01), James et al.
patent: 5231869 (1993-08-01), Klenk et al.

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