Internal-combustion engines – High tension ignition system – Having engine component position sensor
Patent
1984-03-22
1986-10-21
Argenbright, Tony M.
Internal-combustion engines
High tension ignition system
Having engine component position sensor
123644, F02P 304
Patent
active
046179062
ABSTRACT:
An internal combustion engine ignition control includes a variable reluctance pick-up with a winding providing signals to an integrator the output of which controls an ignition switching circuit. The ignition switching circuit includes a current limiter circuit which operates to limit the coil current at a maximum level until the instant of ignition. A capacitor is charged and discharged under the control of the current limiter circuit so that the voltage on it depends on the ratio of the time for which the current limiter circuit is in operation to the ignition cycle duration. An active clamping circuit operates to override the integrator under the control of this capacitor so as to apply a variable preconditioning bias to the output of the integrator which has the effect of varying the instant at which the coil current is switched on. Closed loop dwell control is thus provided in a simple and convenient manner.
REFERENCES:
patent: 3465739 (1969-09-01), Burson
patent: 3937193 (1976-02-01), Kim
patent: 4176645 (1979-12-01), Jundt et al.
patent: 4253442 (1981-03-01), Jundt et al.
patent: 4275703 (1981-06-01), Bodig et al.
patent: 4403591 (1983-09-01), Weber
Argenbright Tony M.
Lucas Industries Public Limited Company
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