Control apparatus for internal combustion engine

Details Control apparatus for internal combustion engine Control apparatus for internal combustion engine

1993-01-27

1994-08-16

Nelli, Raymond A.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

36443108, F02P 514

Patent

active

053377168

ABSTRACT:
An engine control apparatus can significantly improve reliability in misfire detection by preventing erroneous detection of the level of an ion current due to noise superposition. An angular position detector generates a reference position signal representative of a predetermined crank angle of each engine cylinder in synchronism with the rotation of an internal combustion engine. Sensors detect an operating state of the engine. An ion current detector detects an ion current in at least one of the engine cylinders. An engine control parameter setter sets a control parameter for the engine in accordance with the reference position signal and the engine operating state. A misfire detector generates a misfire detection signal indicative of occurrence of misfiring in the at least one engine cylinder on the basis of a value of the ion current. The control parameter setter corrects the control parameter on the basis of the misfire detection signal. Alternately, the engine control apparatus may include a window setter for causing the misfire detector to determine misfire only when ignition coil is in a non-energized state.

REFERENCES:
patent: 4762106 (1988-08-01), Blauhut
patent: 4987771 (1991-01-01), Iwata
patent: 5083278 (1992-01-01), Matsuura
patent: 5087882 (1992-02-01), Iwata
patent: 5088044 (1992-02-01), Matsuura
patent: 5131368 (1992-07-01), Komurasaki
patent: 5131369 (1992-07-01), Kanehiro et al.
patent: 5146893 (1992-09-01), Oshawa
patent: 5153834 (1992-10-01), Abo et al.
patent: 5168854 (1992-12-01), Hashimoto et al.
patent: 5189373 (1993-02-01), Murata et al.

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