Adaptive dwell ignition system

Details Adaptive dwell ignition system Adaptive dwell ignition system

1982-10-04

1984-05-08

Lall, Parshotam S.

Internal-combustion engines

High tension ignition system

Having dwell control

123618, 123644, F02P 500

Patent

active

044468431

ABSTRACT:
An electronic ignition system which is responsive to timing signals generated in timed relationship for providing a substantially constant percent excess dwell time. The timing signals are developed across a sensor coil that is floated between first and second inputs of the system. A capacitor is coupled through a buffer circuit to one of the inputs of the system wherein the timing signal is superimposed onto the voltage developed across the capacitor. A charge and discharge circuit comprising a pair of resistive current sources is utilized to charge and discharge the capacitor during operation. The ratio of the resistive components produces a constant percent excess dwell time that is substantially independent to temperature and process variations.

REFERENCES:
patent: 3378698 (1968-04-01), Kadah
patent: 4064415 (1977-12-01), Blackington
patent: 4117819 (1979-10-01), Jarrett et al.
patent: 4170209 (1979-10-01), Petrie et al.
patent: 4275702 (1981-06-01), Jundt et al.

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