Device for detecting misfire of an internal combustion engine by

Details Device for detecting misfire of an internal combustion engine by Device for detecting misfire of an internal combustion engine by

1992-04-09

1994-03-15

Strecker, Gerard R.

Electricity: measuring and testing

Internal-combustion engine ignition system or device

In situ testing of spark plug

324399, F02P 1700

Patent

active

052948889

ABSTRACT:
In equipment for recognizing misfire in an internal combustion engine, a first voltage waveform is obtained at an intermediate point (A) between a high impedance element (41) and a low impedance element (42). The first voltage waveform has a capacitive discharge component and an inductive discharge component during the spark and a voltage component after completion of the spark. The first voltage waveform is inversely amplified by a comparator (51) and divided by a shunt circuit (52) to obtain a second voltage waveform. In an integration circuit (53), a condenser (C1) is electrically charged by an output voltage from the comparator (51) to obtain a third voltage waveform. The second voltage waveform and the third voltage are compared by a comparator (54) to generate an output pulse. On the basis of the behavior of relatively short and relatively wide output pulse (d2, D2) and additional short output pulses (d3, d4) from the comparator (54), it is determined whether or not a misfire has occurred in the internal combustion engine.

REFERENCES:
patent: 4004213 (1977-01-01), Kato et al.
patent: 4006403 (1977-02-01), Olsen et al.
patent: 4547732 (1985-10-01), Spaude
patent: 5046470 (1991-09-01), Entenmann et al.
patent: 5143042 (1992-09-01), Scheid

Affiliated with

Also associated with

Rating

Device for detecting misfire of an internal combustion engine by does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for detecting misfire of an internal combustion engine by, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for detecting misfire of an internal combustion engine by will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1538294