Internal-combustion engines – Igniters – Incandescent
Patent
1978-11-15
1980-06-10
Lall, P. S.
Internal-combustion engines
Igniters
Incandescent
123148CB, 315209T, F02P 100, H05B 3702
Patent
active
042067367
ABSTRACT:
An ignition system includes an alternating current power source which feeds a transformer having a primary winding, the primary winding being coupled to an electronic switch. The electronic switch intermittently interrupts current flowing in the primary winding and in the output circuit of the power source. Such electronic switch is made operable by virtue of the peak excursions of the alternating current thus supplying the necessary collector potential to such switch during each firing cycle of the system. A capacitor in series with the output circuit of the power source and with the primary winding enables current to be transferred out of the power source to such primary winding. Such electronic switch also provides discrete separation between successive output waveforms of successive ignition firing cycles. The system has appropriate logic circuits which initiate current conduction through the electronic switch and in the oscillator stages of the power source for each firing cycle, turning off the switch and oscillator stages between firing periods. Various types of trigger timing circuits are usable to trigger the several logic circuits for initiating igniter firing by means of the resultant high voltage and high current in the secondary winding of the transformer.
REFERENCES:
patent: 3049642 (1962-08-01), Quinn
patent: 3438362 (1969-04-01), Clyborne et al.
patent: 3952715 (1976-04-01), Van Siclen, Jr.
patent: 3983461 (1976-09-01), Jordan
patent: 4064415 (1977-12-01), Blackington
patent: 4123689 (1978-10-01), Gerry
patent: 4133329 (1979-01-01), Caron
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