Internal-combustion engines – High tension ignition system – Having dwell control
Patent
1979-07-26
1981-06-09
Myhre, Charles J.
Internal-combustion engines
High tension ignition system
Having dwell control
123618, 123644, F02P 304
Patent
active
042718120
ABSTRACT:
In order to increase the closure angle of an interrupter switch connected in series with the primary winding of an ignition coil with increasing engine speeds, a capacitor is connected to the input of a trigger circuit whose output controls this closure angle. The capacitor is charged through a diode while the trigger circuit is switched out. The voltage across the capacitor shifts the threshold of the trigger circuit in a direction increasing the time that the interrupter switch is conductive. The charge on the capacitor is controlled by a signal generator which furnishes an output signal having an amplitude increasing with increasing engine speeds. The closure angle of the interrupter switch therefore also varies as a function of engine speed.
REFERENCES:
patent: Re29862 (1978-12-01), Roozenbeek et al.
patent: 3605713 (1971-09-01), LeMasters et al.
patent: 3838672 (1974-10-01), Richards et al.
patent: 4167927 (1979-09-01), Mikami et al.
patent: 4202304 (1980-05-01), Jundt et al.
Bodig Bernd
Fritz Adolf
Hohne Gerd
Schmied Helmut
Dolinar Andrew M.
Myhre Charles J.
Robert & Bosch GmbH
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