Extended duration high-energy ignition circuit

Details Extended duration high-energy ignition circuit Extended duration high-energy ignition circuit

2007-07-10

2007-07-10

Vo, Hieu T. (Department: 3747)

Internal-combustion engines

High tension ignition system

Additional spark energy supply

C123S654000

Reexamination Certificate

active

11420389

ABSTRACT:
A follow-on circuit for extending the duration of the spark provided by a spark plug. The circuit is connected between the coil secondary and the spark gap, and has a capacitor that discharges to the point of connection through a resistor and inductor. The resistor may be made variable to control the amount and duration of the follow-on current, and hence the energy and duration of the spark event. The circuit may also be used with other ignitors and non-coil ignition circuits.

REFERENCES:
patent: 3677253 (1972-07-01), Oishi et al.
patent: 4648367 (1987-03-01), Gillbrand et al.
Rohwein et al., Automotive Ignition Transfer Efficiency, Society of Automotive Engineers, Inc., 6 pages, 2002.

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