Electronic ignition module

Details Electronic ignition module Electronic ignition module

1990-10-23

1991-10-22

Dolinar, Andrew M.

Internal-combustion engines

Igniters

Sparkers

123418, 123618, F02P 108

Patent

active

050585436

ABSTRACT:
An electronic ignition module for an internal-combustion engine that is supplied with sparking energy from a rotating magnet includes a switchable semiconductor device through which current in the primary of an ignition coil is to be conducted. A portion of a circuit in the module senses a time when voltage across the semiconductor device approaches a maximum value, and produces a signal at that time that switches the semiconductor device out of conduction. A positive-feedback circuit is connected to increase the switching speed of the semiconductor device. The semiconductor device is protected against AC voltages of a polarity opposite to that of the conducting direction of the semiconductor device, and is caused to advance switching time in response to increased voltages associated with high engine speed. A temperature-sensitive resistor performs temperature compensation on the module in response to the temperature of a hot engine to permit restart of the engine if it is stopped briefly.

REFERENCES:
patent: 4175509 (1979-11-01), Orova et al.
patent: 4188929 (1980-02-01), Podrapsky et al.
patent: 4207852 (1980-06-01), Ohki et al.
patent: 4817577 (1989-04-01), Dykstra

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