F - Mech Eng,Light,Heat,Weapons – 02 – P
Patent
F - Mech Eng,Light,Heat,Weapons
02
P
317/5.3
F02P 1/08 (2006.01) F02P 3/045 (2006.01) F02P 9/00 (2006.01)
Patent
CA 1161898
ABSTRACT OF THE DISCLOSURE A supply-voltage-compensated contactless ignition system for internal combustion engines, which includes an input transistor operable in response to an engine ignition signal so as to control the operation of a power transistor to control the energization of an ignition coil. The operating level of the input transistors is varied in accordance with variation in the supply voltage. The system includes a current mirror circuit having first and second current shunt paths including first and second transistors which are connected in parallel with a voltage clamping device. Thus, each current path carries substantially the same amount of current when the supply voltage is normal, and one of the current paths shunts a current increased over that of the other path in response to a rise of the supply voltage beyond a predetermined value. The system further includes a shunt device for shunting the increased current to the input transistors.
375440
Makino Tomoatsu
Tanaka Toshio
Fetherstonhaugh & Co.
Nippondenso Co. Ltd.
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