초록

An r.p.m. limiter for an internal combustion engine operates by gradually reducing the output voltage of the ignition coil until it reaches a point where ignition fails until the r.p.m. is reduced to a predetermined value.

대표청구항 ▼

An internal combustion engine ignition system, of the type including an ignition coil, comprising; pulse generator means for generating pulses of a predetermined width in response to an ignition signal, ignition pulse circuit means for generating ignition pulses in response to said ignition signal,

An internal combustion engine ignition system, of the type including an ignition coil, comprising; pulse generator means for generating pulses of a predetermined width in response to an ignition signal, ignition pulse circuit means for generating ignition pulses in response to said ignition signal, converter means for converting said pulses of said pulse generator means into waveforms of a variable level, comparator means for comparing said variable level with a reference value, and means responsive to an output of said comparator for reducing an output voltage of said ignition coil in a graduated manner, said comparator responsive means including means for increasingly inhibiting the supply of power to said ignition coil in response to increasing engine r.p.m. above a predetermined engine r.p.m. level, by increasingly shortening an effective period of said ignition pulses.