F - Mech Eng,Light,Heat,Weapons – 02 – P
Patent
F - Mech Eng,Light,Heat,Weapons
02
P
317/5.35
F02P 3/06 (2006.01) F02P 5/155 (2006.01)
Patent
CA 1062326
CONTACTLESS IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINE ABSTRACT OF THE DISCLOSURE A contactless ignition system for an internal combustion engine wherein a capacitor is charged by the output from the generating coils of a magneto-alternator driven by the engine, the output of the generating coils is applied to the gate of a thyristor through a transformer to turn on the thyristor, the stored charge on the capacitor is rapidly discharged through the primary winding of an ignition coil in response to the conduction of the thyristor to generate a high voltage in the secondary winding of the ignition coil and cause an ignition spark at the desired spark plug, and the output of the generating coils is applied to the gate of the thyristor through a second transformer and a Zener diode so that when the number of revolutions of the engine exceeds a predetermined value the output of the second transformer becomes higher than the Zener voltage of the Zener diode and the gate voltage of the thyristor is varied in accordance with the output of the second transformer to retard or advance the firing timing of the thyristor and thereby to obtain the desired ignition timing characteristic.
241180
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