Alliedsignal Inc.

Honeywell International Inc.

Timothy F Wiegand

Paul W Futa, Jr

Harold I Miller

Martin J Dutka

Rick L Poelstra

Brent J Gassman

Leonard A Benkosky

A fuel control system () for supplying metered fuel flow to a gas turbine engine is disclosed that includes a variable delivery fuel pump () for outputting a fuel flow that includes a burn fuel flow for the gas turbine engine and a surplus fuel flow recirculated back to an inlet () of the variable delivery fuel pump () and a pump control () for controlling the output of the variable delivery fuel pump to maintain the surplus fuel flow at a substantially constant rate. A method of controlling a fuel system () is also disclosed.

Method and system for fuel control in a gas turbine engine

A mechanical governor for use in a fuel management system having a fuel metering loop responsive to an electronic computer for supplying fuel to a combustion chamber of a turbine. The mechanical governor includes a cylindrical spinning spool valve assembly located in a bore which is responsive to an operational force derived from the rotation of the turbine. In a first mode of operation, communication of control pressure P.sub.c to an integrator valve assembly is inhibited by a first spring associated with the spool valve assembly while in a second mode of operation communication of an operational fluid pressure P.sub.x derived from the control pressure P.sub.c is communicated to the integrator valve assembly after an operational force corresponding to the rotation overcomes the first spring. In the first and second modes of operation, fuel is supplied to the combustion chamber as a function of a pressure differential across the fuel metering loop. Movement of the spool valve assembly is opposed and fuel is supplied to the combustion chamber under the first and second modes of operation until an operational force overcomes a second spring and the pressure differential across the fuel metering loop is lowered to reduce the fuel supplied to the combustion chamber and correspondingly the rotation of the turbine to prevent an over speed condition.

Overspeed governor control system

An accumulator means connected to a passageway in a control system of a gas turbine engine for increasing the volume of a first operational fluid at control pressure Pg supplied to a reset mechanism associated with a power lever when the fluid pressure Po in a second operational fluid is at a predetermined level to modify the time constants in operating the control system and allow fuel supplied to a combustion chamber to maintain a smooth operation for the gas turbine engine.

Operational signal stability means for turbine

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South Bend, IN, United States of America

Timothy F Wiegand