Measuring ignition timing using starter current

Details Measuring ignition timing using starter current Measuring ignition timing using starter current

1975-06-30

1976-07-06

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

F02P 1700

Patent

active

039684253

ABSTRACT:
Apparatus for and method of measuring the ignition timing of an internal combustion engine while cranking the engine with the starter motor, and with the ignition inhibited. Starter motor current fluctuations are examined to determine the times of current peaks due to compression in individual cylinders. Means coupled to the ignition circuit determines the times of points openings. A time difference signal representing the lead or lag of the ignition relative to the starter current peaks is generated. The lead or lag is then related to the time of top dead center in terms of degrees.

REFERENCES:
patent: 3713331 (1973-01-01), Peterson et al.
patent: 3765233 (1973-10-01), Germann
patent: 3823606 (1974-07-01), Maringer

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