Engine and fuel shutdown control

Details Engine and fuel shutdown control Engine and fuel shutdown control

1977-08-11

1979-04-24

Lazarus, Ira S.

Internal-combustion engines

Starting device

For airplane

123139ST, 123139AZ, 123198DB, 123198D, F02B 7700

Patent

active

041506545

ABSTRACT:
A solenoid-operated fuel valve opens automatically when the engine is started to allow fuel to flow from a fuel tank to the engine and closes automatically when the engine throttle is moved to fuel-off position to shut down flow of fuel through the governor for the engine. In the event of an emergency, operation of a manual shutdown control will de-energize the fuel valve solenoid to shut off flow of fuel to the engine compartment and will also shut down the engine by energizing a solenoid to move the fuel rack for the governor to fuel-off position. Actuation of a fire-extinguisher system for the engine will automatically de-energize the fuel-valve solenoid and energize the fuel-rack solenoid. The fuel-rack solenoid remains energized for a timed period sufficient to ensure engine shutdown in emergency situations. Control circuits are provided to ensure that current to each of the solenoids is reduced to a low holding level after initial energization and pull-in of the solenoids and are also provided to protect against damage from excessive current in the event either solenoid is shorted.

REFERENCES:
patent: 3371634 (1968-03-01), Lalande
patent: 3602207 (1971-08-01), Kilmer
patent: 3605711 (1971-09-01), Fuso
patent: 3791366 (1974-02-01), MacMillan
patent: 3841291 (1974-10-01), Ludewig
patent: 3914735 (1975-10-01), Guillaume
patent: 3982519 (1976-09-01), Moon
patent: 3991726 (1976-11-01), Kawai et al.
patent: 4020814 (1977-05-01), Hewitt et al.
patent: 4088110 (1978-05-01), Sperline

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