Fuel control system for gas turbine engine

Details Fuel control system for gas turbine engine Fuel control system for gas turbine engine

1975-06-10

1976-11-02

Freeh, William L.

Power plants

Combustion products used as motive fluid

Multiple fluid-operated motors

60 3928R, F02C 908, F02C 910

Patent

active

039888878

ABSTRACT:
A fuel control system for a gas turbine engine which has a gas generator and a separate work turbine, comprises a metering device and an arrangement of throttle valves downstream of the metering device for controlling the fuel pressure drop through the metering device. A first throttle valve is responsive to a difference between desired and actual gas generator speeds to maintain the metering pressure drop constant for a selected speed. This throttle valve is also operable to restrict fuel flow if the work turbine exceeds a predetermined speed. A second throttle valve, in parallel with the first valve controls fuel flow at low engine speeds, and first valve controls fuel flow during acceleration.

REFERENCES:
patent: 3475910 (1969-11-01), Warne
patent: 3514948 (1970-06-01), Warne
patent: 3540217 (1970-11-01), Peczkowski et al.
patent: 3557552 (1971-01-01), Yates
patent: 3777483 (1973-12-01), Lewis
patent: 3808801 (1974-05-01), Taylor
patent: 3824786 (1974-07-01), Skinner

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