Abstract: An ignition apparatus for use with an internal combustion engine to produce an electrical spark at a spark ignition device. The ignition apparatus includes triggering circuitry having a processor with stored timing data. The processor receives a signal indicative of the rotational position of the magnet and generates a triggering signal. The triggering circuitry switches between a first mode wherein the triggering signal occurs at a fixed time relative to top dead center and a second mode wherein the triggering signal occurs at a variable time relative to top dead center based on the stored timing data.

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.