Internal combustion engine ignition systems
First Claim
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1. 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.
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Abstract
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.
16 Citations
7 Claims
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1. 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.
- View Dependent Claims (2)
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3. An internal combustion engine ignition system, comprising;
- an ignition pulse generator for generating ignition pulses in synchronism with the revolution of an internal combustion engine, driving means for controlling the supply of power to an ignition coil in accordance with the ignition pulses generated by said ignition pulse generator; and
means for gradually reducing a dwell angle of said ignition coil in a power supply period of said ignition coil in accordance with an increase in the r.p.m. of said internal combustion engine, by gradually reducing the time during which power is supplied to said ignition coil, said dwell angle reducing means comprising means for progressively shortening an effective period of application of said ignition pulses to said driving means, said dewll angle being reduced from a predetermined value to a minimum value within a predetermined engine r.p.m. range. - View Dependent Claims (4, 5, 6, 7)
- an ignition pulse generator for generating ignition pulses in synchronism with the revolution of an internal combustion engine, driving means for controlling the supply of power to an ignition coil in accordance with the ignition pulses generated by said ignition pulse generator; and
Specification