Capacitor discharge engine ignition system with automatic speed

Details Capacitor discharge engine ignition system with automatic speed Capacitor discharge engine ignition system with automatic speed

1992-08-26

1993-09-21

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Engine speed reduction by partial or complete omission of...

F02P 1102, F02P 308

Patent

active

052459659

ABSTRACT:
A capacitor discharge engine ignition system that includes a charge coil responsive to a flywheel magnet for charging an ignition capacitor, and a trigger coil responsive to the flywheel magnet for triggering an SCR rapidly to discharge the capacitor through the primary of the ignition coil. Circuitry for automatically electronically limiting overspeed operation of the engine includes a capacitor connected to the trigger coil, and a voltage divider connected between the capacitor and the gate of the SCR. This capacitor is charged upon occurrence of each trigger signal, and during normal operation has sufficient time to discharge through the voltage divider before generation of the charge signal. However, when the engine is operating at excessive speed, there is sufficient charge on the trigger capacitor to gate operation of the SCR, short circuiting the ignition charge capacitor and preventing operation of the ignition.

REFERENCES:
patent: 3703889 (1972-11-01), Bodig et al.
patent: 3998198 (1976-12-01), Jereb
patent: 4252095 (1981-02-01), Jaulmes
patent: 4324215 (1982-04-01), Sieja
patent: 4344395 (1982-08-01), Kondo et al.
patent: 4436076 (1984-03-01), Piteo
patent: 4641618 (1987-02-01), Dogadko et al.
patent: 5138995 (1992-08-01), Erhard

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