Power plants – Combustion products used as motive fluid – Combined with regulation of power output feature
Patent
1990-01-08
1992-05-26
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
Combined with regulation of power output feature
60734, F02C 928
Patent
active
051156385
ABSTRACT:
A fuel control system for a small gas turbine propulsion engine which enables a long term storage with fuel combined with a rapid start and operation as well as rapid stable control of the fuel flow. The control system includes an electrically controlled servo valve disposed upstream of a fuel pump, with the valve and pressure sensing cavities of a differential pressure control device being maintained full of fuel for a long term storage. Leakproof-type flexure pivots are provided for transmitting motion of an electrical torque motor to the servo valve and transmitting motion of a diaphragm to a throttle located downstream of the fuel pump. A frangible diaphragm is provided at the pump inlet which is adapted to be fractured or otherwise opened to activate the system upon a start-up of the turbine engine and, for this purpose, pressurized gas may be used to temporarily pressurize a fuel tank to burst the frangible diaphragm. The fuel flow is proportional to an applied electric current and independent of the tank or engine pressures, with the electric current being controlled by an electronic controller.
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patent: 3660977 (1972-05-01), Reynolds
patent: 3695037 (1972-10-01), Alverani
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patent: 3946551 (1976-03-01), Linebrink et al.
patent: 4033115 (1977-07-01), Baits
patent: 4922708 (1990-05-01), Nelson
McArthur Malcolm J.
Reed Wendell E.
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