Electronic magneto ignition for internal combustion engines

Details Electronic magneto ignition for internal combustion engines Electronic magneto ignition for internal combustion engines

1977-05-26

1979-11-13

Myhre, Charles J.

Internal-combustion engines

Igniters

Sparkers

123148E, 315209T, 315209SC, 315218, F02P 102, H05B 4136

Patent

active

041739639

ABSTRACT:
An electronic magneto ignition for internal combustion engines has a permanent magnet mounted on the engine fly wheel and rotating therewith. A magnetic field coil has a primary winding and a secondary winding in which ignition current and ignition voltage, respectively, are produced during the passage of the permanent magnet. A switching transistor is connected in parallel with the primary winding and in parallel with a diode poled opposite to the emitter-collector path of the transistor. An electronic control circuit blocks the switching transistor at the desired ignition time so that the primary circuit is interrupted and the high voltage for the combustion of the fuel is produced in the secondary winding. In the electronic control circuit, a parallel circuit consisting of a first control coil, which has a resistor in series therewith, and a thyristor is connected from the base to the emitter of the switching transistor. Another resistor is connected from the collector of the switching transistor, as a feedback resistor, to the control electrode of the thyristor. A second control coil has a potentiometer connected in parallel, the potentiometer having a movable tap so that a portion of the voltage applied to the resistor is fed to the control electrode of the thyristor. The first control coil is arranged at an angle from the ignition coil and the second control coil is arranged at an angle from the first control coil, as viewed in the direction of rotation of the fly wheel.

REFERENCES:
patent: 3169212 (1965-02-01), Walters
patent: 3484677 (1969-12-01), Piteo
patent: 3490426 (1970-01-01), Farr
patent: 3612023 (1971-10-01), Sohner et al.
patent: 3630185 (1971-12-01), Struber et al.
patent: 3938491 (1976-02-01), Mazz
patent: 3958546 (1976-05-01), Ohki et al.
patent: 3963015 (1976-06-01), Haubner et al.

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