Internal-combustion engines – Igniters – Incandescent
Patent
1974-11-27
1976-06-08
Myhre, Charles J.
Internal-combustion engines
Igniters
Incandescent
315209CD, F02P 100
Patent
active
039616177
ABSTRACT:
An ignition device for an internal combustion engine which comprises a DC-DC converter for stepping up battery voltage; a capacitor charged with output from said DC-DC converter; an SCR for discharging the electric energy stored in the capacitor through the primary side of an ignition coil; a circuit for igniting the SCR according to the operating condition of a contact breaker; a bias voltage source for rectifying output voltage from bias voltage generating winding fitted to the oscillation voltage stepup transformer of the DC-DC converter and impressing the resultant negative output on the SCR gate and the resultant positive output of the SCR cathode; a transformer type coupling circuit connected between a circuit included in the DC-DC converter to generate high rectified output voltage and the capacitor, thereby coupling the DC-DC converter with the capacitor, wherein the transformer type coupling circuit prevents excess load from being applied on the DC-DC converter when the SCR is rendered conducting and the voltage generated on the secondary side of said transformer is added to output voltage from the DC-DC converter to provide an increased level of voltage.
REFERENCES:
patent: 3271593 (1966-09-01), De Vilbiss
patent: 3297911 (1967-01-01), Quinn
patent: 3306275 (1967-02-01), Hufton
patent: 3714507 (1973-01-01), Schweitzer et al.
patent: 3718125 (1973-02-01), Posey
Cox Ronald B.
Myhre Charles J.
Suwa Electric Wire Co., Ltd.
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