Internal-combustion engines – High tension ignition system – Using capacitive storage and discharge for spark energy
Patent
1990-06-05
1991-03-12
Wolfe, Willis R.
Internal-combustion engines
High tension ignition system
Using capacitive storage and discharge for spark energy
123620, 123621, F02P 308
Patent
active
049985264
ABSTRACT:
An ignition system for a spark ignited internal combustion engine. The system can apply alternating current to the electrodes of a spark plug to maintain an arc at the electrodes for the desired length of time. The amplitude of the arc current can be varied. The alternating current is developed by a DC to AC inverter that is comprised of a transformer that has a center tapped primary and a secondary that is connected to the spark plug. An arc is initiated at the spark plug by discharging a capacitor through one of the winding portions of the center-tapped primary. Alternatively, the energy stored in an inductor can be supplied to a primary winding portion to initiate an arc. The ignition system is powered by a controlled current source that receives input power from a source of direct voltage such as a battery on a motor vehicle.
REFERENCES:
patent: 3921606 (1975-11-01), Habert
patent: 4327701 (1982-05-01), Gerry
patent: 4493306 (1985-01-01), Asik
patent: 4562823 (1986-01-01), Moritugu et al.
patent: 4677960 (1987-07-01), Ward
patent: 4947821 (1990-08-01), Somiya
General Motors Corporation
Meland Creighton R.
Wolfe Willis R.
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