Ion current sensing device for an internal combustion engine wit

Details Ion current sensing device for an internal combustion engine wit Ion current sensing device for an internal combustion engine wit

1991-10-10

1993-01-19

Strecker, Gerard R.

Electricity: measuring and testing

Internal-combustion engine ignition system or device

In situ testing of spark plug

324391, 324378, 123425, F02P 1700

Patent

active

051809842

ABSTRACT:
An ion current sensing device for an internal combustion engine is able to accurately sense an ion current generated between electrodes of a spark plug during combustion of a mixture even when the electrodes have been smeared by carbon or other combustion products deposited or accumulated thereon. A power source 14 supplies a bias voltage to the electrodes of the spark plug. An ion current sensing resistor 15 is connected between the elecrodes of the spark plug and the power source for sensing an ion current as generated between the electrodes of the spark plug each time a mixture in the combustion chamber is combusted. A comparator 11 compares the voltage across the ion current sensing resistor with a reference voltage and generates an output signal when the voltage is higher than the reference voltage. A filter comprising a capacitor 22 and a resistor 23 is connected between the ion current sensing resistor and the comparator for passing only AC components of the voltage across the ion current sensing resistor to the comparator while blocking a DC component thereof.

REFERENCES:
patent: 3942102 (1976-03-01), Kuhn et al.
patent: 4762106 (1988-08-01), Blauhut

Affiliated with

Also associated with

Rating

Ion current sensing device for an internal combustion engine wit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ion current sensing device for an internal combustion engine wit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ion current sensing device for an internal combustion engine wit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-104084