Spark plug load testing for an internal combustion engine

Details Spark plug load testing for an internal combustion engine Spark plug load testing for an internal combustion engine

1979-12-20

1981-09-22

Gruber, Felix D.

Boots, shoes, and leggings

731172, 364483, 324384, G01R 2100, G06F 1520, G01M 1500

Patent

active

042913837

ABSTRACT:
The spark voltage waveform at the secondary of the ignition coil of an internal combustion (IC) engine is sensed over a plurality of successive engine cycles. The instantaneous sub-cyclic position of the engine crankshaft is measured at successive crankshaft angle increments within each engine cycle and each sensed spark voltage signal is identified by the instantaneous value of crankshaft position at which it appears, thereby providing identification of each spark voltage signal with an associated cylinder of the engine. The number of samples for each cylinder together with the peak KV voltage magnitude and time duration of each are measured and the maximum, minimum and mean values of peak KV and spark duration for the spark signals associated with each cylinder together with the number of samples obtained are compared with the values obtained for each other cylinder to provide an indication of the relative sub-cyclic ignition efficiency of the ignition secondary circuit and the individual cylinders.

REFERENCES:
patent: 4006403 (1977-02-01), Olsen et al.
patent: 4125894 (1978-11-01), Cashel et al.
patent: 4145746 (1979-03-01), Trussell et al.
patent: 4170131 (1979-10-01), Gniewek et al.
patent: 4179922 (1979-12-01), Bouverie et al.

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