Ignition system trigger circuit for internal combustion engines

Details Ignition system trigger circuit for internal combustion engines Ignition system trigger circuit for internal combustion engines

1981-10-08

1983-09-06

Nelli, Raymond A.

Internal-combustion engines

High tension ignition system

Using capacitive storage and discharge for spark energy

123596, 123605, F02P 306, F02P 100

Patent

active

044022980

ABSTRACT:
An improved trigger circuit for a magneto-type ignition system is described. The trigger circuit includes a first generating coil for supplying current flow to a primary winding of the ignition coil, a transistor for controlling the current flow through the primary winding, a capacitor, a thyristor for cooperating with the capacitor to render the transistor non-conductive, and a second generating coil for supplying the power required to charge the capacitor and to control the conduction of both the transistor and thyristor, such that the capacitor is charged and the transistor is rendered conductive by one half wave output from the second generating coil and the thyristor is rendered conductive by the other half wave output from the second generating coil. The conduction of the thyristor is operative to discharge the capacitor and render the transistor non-conductive, whereby the current flow from the first generating coil is directed through the primary winding of the ignition coil to induce a sparking potential in the secondary winding of the ignition coil.

REFERENCES:
patent: 3911886 (1975-10-01), Nagasawa
patent: 3985109 (1976-10-01), Kondo et al.
patent: 4015564 (1977-04-01), Ritzner
patent: 4150652 (1979-04-01), Nagusawa
patent: 4232646 (1980-11-01), Asai
patent: 4346690 (1982-08-01), Anderson
patent: 4366801 (1983-01-01), Endo et al.

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