Ionic current sensing apparatus for engine spark plug with negat

Details Ionic current sensing apparatus for engine spark plug with negat Ionic current sensing apparatus for engine spark plug with negat

1991-10-29

1994-03-08

Strecker, Gerard R.

Electricity: measuring and testing

Internal-combustion engine ignition system or device

In situ testing of spark plug

324385, 324388, 324402, 123425, F02P 1700, F02P 900

Patent

active

052931293

ABSTRACT:
A direct current power supply applies a positive voltage between the center electrode and the ground electrode of a spark plug in an internal combustion engine after discharge of the spark plug. Ionic current flowing between the electrodes due to the positive voltage is measured by a current sensor. The ionic current caused by the positive voltage is due to electrons, so it has a large magnitude and can be easily measured.

REFERENCES:
patent: 3035224 (1962-05-01), Whaley et al.
patent: 4491110 (1985-01-01), Bone et al.
patent: 4648367 (1987-03-01), Gillbrand et al.
patent: 5087882 (1992-02-01), Iwata
Motortechnische Zeitschrisft 51 (1990) 3, pp. 118-122.

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