Fuel supply misfire-detecting system for internal combustion eng

Details Fuel supply misfire-detecting system for internal combustion eng Fuel supply misfire-detecting system for internal combustion eng

1992-12-11

1994-09-20

Strecker, Gerard R.

Electricity: measuring and testing

Internal-combustion engine ignition system or device

In situ testing of spark plug

731173, 123479, 324380, 324391, 324393, F02P 1700, F02M 6500, G01M 1500

Patent

active

053492994

ABSTRACT:
A misfire-detecting system detects a misfire occurring in an internal combustion engine. A value of sparking voltage for discharging a spark plug of the engine is detected. A differentiating circuit differentiates the detected value of the sparking voltage. A misfire-determining circuit compares the differential value of the sparking voltage with a predetermined value, and determines, based upon a result of the comparison, whether a misfire has occurred in the engine.

REFERENCES:
patent: 4349782 (1982-09-01), Doss
patent: 4401948 (1983-08-01), Miura et al.
patent: 4547734 (1985-10-01), Spaude
patent: 4987771 (1991-01-01), Iwata
patent: 5215067 (1993-06-01), Shimasaki et al.
patent: 5237279 (1993-08-01), Shimasaki et al.

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