Internal combustion engine control apparatus with ignition coil

Details Internal combustion engine control apparatus with ignition coil Internal combustion engine control apparatus with ignition coil

1993-02-11

1994-05-10

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123630, 324388, F02P 1500

Patent

active

053098846

ABSTRACT:
An engine control apparatus capable of detecting occurrence of abnormality in the ignition coil with high reliability. The apparatus includes an initial detection level hold device for holding an initial level (In) of a detected ion current value I, and an ignition coil diagnosis device for generating an abnormality decision signal of the ignition coil in dependence on the initial level of the ion current. By positively utilizing noise produced in an initial phase of the ignition cycle instead of eliminating it, the abnormality decision signal is generated, on the basis of which an appropriate engine protection measure is taken.

REFERENCES:
patent: 4117807 (1978-10-01), Barnard
patent: 4762106 (1988-08-01), Blauhut
patent: 4886029 (1989-12-01), Lill et al.
patent: 4969443 (1990-11-01), De Biasi
patent: 4987771 (1991-01-01), Iwata
patent: 5046470 (1991-09-01), Entenmann et al.
patent: 5239973 (1993-08-01), Murata et al.

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