Device for diagnosing ignition system for use in internal combus

Details Device for diagnosing ignition system for use in internal combus Device for diagnosing ignition system for use in internal combus

1980-07-02

1983-03-22

Krawczewicz, Stanley T.

Electricity: measuring and testing

Internal-combustion engine ignition system or device

324 60C, 324388, 324390, F02P 1700

Patent

active

043777856

ABSTRACT:
An ignition system for internal combustion engine, which controls the ignition coil primary current according to the magnitude of the floating capacitance in the secondary side wiring section of the ignition coil, by determining the floating capacitance from the negative slope of rising of the secondary voltage produced in the ignition coil in response to the cutoff of the primary current and the primary cutoff current value, the slope being determined by measuring the period T until the secondary voltage reaches a predetermined voltage value. When the floating capacitance is increased, the primary cutoff current value is increased to increase the coil energy so as to increase the secondary voltage generated in the ignition coil for preventing the generation of a miss-spark.

REFERENCES:
patent: 3959725 (1976-05-01), Capek
patent: 3986108 (1976-10-01), Thomas
patent: 4068165 (1978-01-01), Labinsky et al.
patent: 4123674 (1978-10-01), Cominskey et al.

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