Internal-combustion engines – High tension ignition system – Power supply – ignition coil primary – and interrupter element...
Patent
1982-11-22
1985-04-09
Lall, Parshotam S.
Internal-combustion engines
High tension ignition system
Power supply, ignition coil primary, and interrupter element...
123652, F02P 500
Patent
active
045094969
ABSTRACT:
An ignition circuit for an internal combustion engine includes an ignition coil having a primary winding which is controlled by a power transistor. The lower transistor is controlled by either a first or a second control transistor. When the primary current flowing through the primary winding of the ignition coil is lower than a predetermined value, cut-off of the power transistor is controlled by the first control transistor. When the primary current is higher than the pre-determined value, cut-off of the power transistor is controlled by the second control transistor which becomes conductive prior to conduction of the first control transistor. Thus, two independent control means are alternately operated responsive to the primary current, which is a function of engine speed.
REFERENCES:
patent: 3841288 (1974-10-01), Korteling
patent: 3958546 (1976-05-01), Ohki et al.
patent: 4174697 (1979-11-01), Podrapsky et al.
patent: 4233951 (1980-11-01), Take
patent: 4342304 (1982-08-01), Watanabe
patent: 4356808 (1982-11-01), Bodig et al.
Lall Parshotam S.
Tanaka Kogyo Company, Ltd.
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