Engine shut-down device

Details Engine shut-down device Engine shut-down device

1990-05-24

1991-12-31

Dolinar, Andrew M.

Internal-combustion engines

High tension ignition system

Safety device

123149R, 123198DC, F02P 108, F02P 1102

Patent

active

050762508

ABSTRACT:
An engine shut-down device is shown for an engine, having a magneto for generating an a.c. voltage in response to a speed of the engine, an ignition coil provided to ignite the engine, a driver responsive to the a.c. voltage for driving the ignition coil, and generator for generating an engine-stop signal. The device includes a trigger responsive to the engine-stop signal for flowing a forward current from magneto to a ground when the magneto produces a positive value of the a.c. voltage and a backward current for a predetermined period of time from the ground to the magneto when the magneto produces a negative value of the a.c. voltage, an engine-stop section responsive to the backward current for flowing a short-circuit current from ground to the magneto to disoperate the ignition coil, so as to stop the engine.

REFERENCES:
patent: 3116729 (1964-01-01), Crowe
patent: 3726265 (1973-04-01), Howard
patent: 4034732 (1977-07-01), Van Burkleo
patent: 4193385 (1980-03-01), Katsumata et al.
patent: 4369745 (1983-01-01), Howard

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