Ignition timing control system for internal combustion engine

Details Ignition timing control system for internal combustion engine Ignition timing control system for internal combustion engine

1982-11-22

1984-07-24

Dolinar, Andrew M.

Internal-combustion engines

High tension ignition system

Power supply, ignition coil primary, and interrupter element...

123618, 315209T, F02P 304

Patent

active

044612656

ABSTRACT:
An ignition timing control system for an internal combustion engine comprising a circuit for generating a reference ignition signal in synchronism with the engine, a circuit for generating a retard ignition signal at a point shifted by a selected shaft angle of the engine from the reference ignition signal, and an ignition circuit for controlling the ignition timing of the engine according to the retard ignition signal; said retard ignition signal generator includes a capacitor circuit for charging and discharging, a first constant-current circuit for always supplying a first current to the capacitor circuit, a second constant-current circuit for supplying a second current larger than the first current to said capacitor circuit, a switching circuit which starts flowing the second current in synchronism with the reference ignition signal and cuts off the second current when the terminal voltage across said capacitor circuit reaches a reference level, and an output circuit for generating a retard ignition signal in synchronism with the cutting-off operation of said switching circuit.

REFERENCES:
patent: 3700929 (1972-10-01), Frederiksen
patent: 3838672 (1974-10-01), Richards et al.
patent: 4133325 (1979-01-01), West

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