Ignition system for a multiple cylinder internal combustion engi

Details Ignition system for a multiple cylinder internal combustion engi Ignition system for a multiple cylinder internal combustion engi

1978-03-06

1979-10-09

Myhre, Charles J.

Internal-combustion engines

Igniters

Incandescent

123148E, 307252C, F02P 100

Patent

active

041702085

ABSTRACT:
An ignition system for a multiple cylinder internal combustion engine comprises a power supply, a plurality of ignition coils, a plurality of control circuits, each provided in association with a respective one of the ignition coils for controlling the primary current of the associated ignition coil, and a plurality of signal sources producing signals in turn and in time with the rotation of the engine, each of the signal sources provided in association with a respective one of the control circuits, and adapted to produce a signal in advance of the ignition timing of the associated ignition coil. Each of the control circuit includes a gate turn-off thyristor connected in series with the primary winding of the associated ignition coil. The gate turn-off thyristor is adapted to be turned on when the signal source associated with the control circuit including the gate turn-off thyristor produces a signal in advance of the associated ignition coil, and is turned off when one of other signal sources produces a signal at the ignition timing of the associated ignition coil. The above mentioned one of other signal sources also serves to turn on the gate turn-off thyristor of the associated control circuit. Accordingly, the number of required signal sources is reduced and is equal to the number of ignition coils.

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