Direct spark ignition system

Details Direct spark ignition system Direct spark ignition system

1985-08-02

1986-12-02

Scott, Samuel

Combustion

Timer, programmer, retarder or condition responsive control

Shutdown by sensed absence of flame in proving period

340579, F23N 500

Patent

active

046261931

ABSTRACT:
A direct spark ignition system is provided with an improved spark generator powered directly from a low voltage dc source through an inverter controlled by a gated oscillator. The inverter is comprised of a step-up transformer having its primary winding connected between the power source and a common-emitter transistor having its base electrode connected to an output of the oscillator. A rectifier couples the secondary winding to a storage capacitor, and a spark discharge timing means controls periodic discharge of the storage capacitor into a spark electrode. A diode between the collector of the switching transistor and the storage capacitor is poled to couple back EMF of the transformer primary winding into the capacitor, thereby not only protecting the collector of the transistor but adding the back EMF energy to the charge in the capacitor for higher efficiency. High spark rates (nominal 750 sparks per minute) are achieved.

REFERENCES:
patent: 4145180 (1979-03-01), Bendorf

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