The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 1979
Filed:
Mar. 06, 1978
Kokusan Denki Co., Ltd., Numazu, JP;
Abstract
An ignition system for a multiple cylinder internal combustion engine comprises a power supply, a plurality of ignition coils, a plurality of control circuits, each provided in association with a respective one of the ignition coils for controlling the primary current of the associated ignition coil, and a plurality of signal sources producing signals in turn and in time with the rotation of the engine, each of the signal sources provided in association with a respective one of the control circuits, and adapted to produce a signal in advance of the ignition timing of the associated ignition coil. Each of the control circuit includes a gate turn-off thyristor connected in series with the primary winding of the associated ignition coil. The gate turn-off thyristor is adapted to be turned on when the signal source associated with the control circuit including the gate turn-off thyristor produces a signal in advance of the associated ignition coil, and is turned off when one of other signal sources produces a signal at the ignition timing of the associated ignition coil. The above mentioned one of other signal sources also serves to turn on the gate turn-off thyristor of the associated control circuit. Accordingly, the number of required signal sources is reduced and is equal to the number of ignition coils.