Electronic ignition system for an internal combustion engine

Internal-combustion engines – High tension ignition system – Having engine component position sensor

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Details

123618, 123644, F02P 100

Patent

active

046179054

ABSTRACT:
A mechanically timed ignition system for an internal combustion engine has a variable reluctance transducer mechanically operated by the engine to produce an output waveform having zero crossings coinciding with the desired instants of sparks. A comparator means at the input of an integrated ignition control circuit is connected to a winding of the transducer. The i.c. output point, which controls a semiconductor switch connecting an ignition coil across a supply, is connected by a C-R feedback path to the input of the comparator means, to provide transient positive feedback, which is effective at cranking speed to provide improved rejection of low level audio frequency interference signals. W

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