Plasma ignition system using photothyristors for internal combus

Details Plasma ignition system using photothyristors for internal combus Plasma ignition system using photothyristors for internal combus

1982-04-07

1983-12-06

Nelli, Raymond A.

Internal-combustion engines

Igniters

123596, 123605, 123606, 123633, 123640, 123643, 123653, F02P 100

Patent

active

044186606

ABSTRACT:
A plasma ignition system for an internal combustion engine, which comprises: (a) a low DC voltage power supply; (b) a DC-DC converter which converts a low DC voltage from the low DC voltage supply to the corresponding AC voltage and inverts the AC voltage to a high DC voltage; (c) a plurality of plasma ignition plugs each located within one of the cylinders; (d) a plurality of first capacitors each for changing the high DC voltage received from the DC-DC converter; (e) a plurality of photosensitive switching elements each connected between each corresponding first capacitor and ground and which turns on to apply the plasma ignition energy charged within the corresponding first capacitor to the corresponding plasma ignition plug at a predetermined timing; (f) a plurality of voltage-boosting transformers each having a common terminal of primary and secondary windings connected to one terminal of each corresponding plasma ignition energy capacitor and another terminal of the primary winding connected to the corresponding plasma ignition plug for boosting the voltage across the corresponding first capacitor to a still higher voltage at the secondary winding thereof depending on the winding ratio therebetween; (g) a plurality of second capacitors connected between another terminal of the secondary winding of each voltage-boosting transformer and ground so as to form an oscillation circuit together with the primary winding of the corresponding transformer;

REFERENCES:
patent: Re30426 (1980-11-01), Haslett
patent: 3780343 (1973-12-01), Stonham
patent: 3788293 (1974-06-01), Anderson
patent: 3835830 (1974-09-01), Shepard
patent: 4366801 (1983-01-01), Endo et al.
patent: 4369758 (1983-01-01), Endo et al.

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