Patent ID: 6766787
Filing Date: 2004-07-27
Classification: F02P

Abstract:
A circuit to achieve ignition advance, limitation of speed of revolutions and to prevent backfiring and reverse direction running in a magnetic ignition system comprising a flywheel, which magnetic ignition system comprises an ignition transformer, a triggering coil to generate a triggering pulse to a main switch and a charging coil to generate a charging pulse to a charging circuit, whereby the triggering pulse is arranged to lie before the charging pulse when the flywheel rotates in the forward direction, characterised in that the circuit comprises a control switch controlling a time-constant circuit that opens/blocks the triggering pulse that is connected between the charging circuit and the main switch, which ensures that triggering occurs on the triggering pulse of the next revolution, whereby limitation of the speed of revolutions occurs by means of adjustment of the time-constant circuit and that backfiring is prevented in that the charging pulse is arranged to block the subsequent triggering pulse via the time-constant circuit and the control switch.