Variable timing ignition circuit including conditional ignition

Internal-combustion engines – Engine speed regulator – Engine speed reduction by partial or complete omission of...

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123418, F02P 1102

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active

055179622

ABSTRACT:
A variable integration based ignition circuit for an internal combustion engine recognizes predetermined engine conditions and modifies or limits ignition advance when the predetermined conditions are violated to protect the engine. The ignition circuit includes an ignition triggering circuit which causes the engine ignition to ignite in response to ignition pulse signals. A pulse generator generates and outputs signal pulses when the sensor detects positions of the crankshaft. A speed detector calculates the rotational speed of the flywheel based on the signal pulses. Ignition pulse signals are retarded when the rotational speed exceeds a predetermined level to limit rotational speed and protect the engine. The ignition circuit may also limit ignition pulse signals in response to low oil pressure.

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