Closed loop fuel control system

Details Closed loop fuel control system Closed loop fuel control system

1991-10-11

1994-01-04

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

Different fluids

60 39281, F02C 928

Patent

active

052749967

ABSTRACT:
A fuel control system for accurately controlling the fuel flow rate to a gas turbine engine during the initial stages of startup is provided. The fuel control system has a novel, closed control loop that measures the actual fuel flow rate to the primary nozzles of the engine, and uses this measurement to trim the commanded fuel flow rate signal generated by preprogrammed schedules in the engine's electronic control unit. By the novel arrangement of proportional and integral controllers, the fuel control system maintains a forward path gain of unity while permitting the independent adjustment of the gain of the controllers to achieve the system stability and response necessary for quick correction of fuel flow rate errors.

REFERENCES:
patent: 3381470 (1968-05-01), Hammerstein
patent: 3738104 (1973-06-01), Rosa
patent: 4337615 (1982-07-01), LaCroix
patent: 4508127 (1985-04-01), Thurston
patent: 4627234 (1986-12-01), Schuh
Fink, Donald G. Electronic Engineer's Handbook McGraw-Hill; New York, 1975 pp. 24-14 & 24-15.

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