Driving circuit for a capacitor discharge ignition system
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United States of America Patent
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-
Oct 30, 1990
Grant Date -
N/A
app pub date -
Jul 14, 1989
filing date -
Jul 14, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A capacitor-discharge ignition system discharges a load capacitor to drive an ignition coil for producing an ignition spark. The ignition system includes an oscillator generating complimentary pulse trains that activate a pair of power FETs to drive a transformer. The transformer generates an output voltage that is doubled in magnitude and stored in the load capacitor until the load capacitor is triggered by a trigger circuit to provide an ignition spark. A signal generated by a feedback circuit in response to the occurrence of an ignition spark is employed to inhibit further discharge of the load capacitor as well as to deactivate the transformer. An auxiliary D.C.-to-D.C. converter driven by the oscillator provides a supply voltage for the components of the ignition system.
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