Internal-combustion engines – High tension ignition system – Using capacitive storage and discharge for spark energy
Patent
1981-09-25
1984-03-13
Lall, Parshotam S.
Internal-combustion engines
High tension ignition system
Using capacitive storage and discharge for spark energy
123630, 123198DC, 123334, 123618, F02P 500
Patent
active
044360762
ABSTRACT:
Electronic shut-off circuit is provided in a capacitor discharge ignition system for internal combustion engines to protect against excessive high-speed operation. The circuit includes an electronic switching component connected across the main capacitor of the ignition system. A trigger coil is connected in circuit with a control electrode of the electronic switching component. The trigger coil is selected to generate a sufficient voltage to bias the switching means to its conductive state, thereby providing a low impedance shunt path to short the capacitor and to prevent it from discharging its energy into the primary of the ignition coil. A resistance-capacitance network, in circuit with the switching component, serves to hold it "on" until the engine is shut off.
REFERENCES:
patent: 3490426 (1970-01-01), Farr
patent: 3875915 (1975-04-01), Anderson et al.
patent: 3967604 (1976-07-01), Kondo
patent: 4038951 (1977-08-01), Schweikart
patent: 4186711 (1980-02-01), Joerg
patent: 4297977 (1981-11-01), Boyama
Lall Parshotam S.
R. E. Phelon Company, Inc.
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