Discharge ignition apparatus for internal combustion engine having automatic spark advance
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United States of America Patent
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-
Jul 8, 2003
Grant Date -
Dec 12, 2002
app pub date -
Jun 6, 2001
filing date -
Jun 6, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A capacitive discharge ignition apparatus provides spark advance with engine speed. The ignition apparatus includes triggering circuitry connected to the primary coil of the high voltage transformer. The triggering circuitry produces a triggering signal based on voltage induced in the primary coil by revolution of a permanent magnet. The triggering circuitry is adapted to provide the triggering signal at low RPMs on the trailing edge of a predetermined half cycle. At higher RPMs, the triggering signal shifts to the leading edge of the half-cycle so as to advance the spark.
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