초록 ▼

In the fuel management system having an electronic computer (36) for operating a metering valve (50) through which fuel is supplied to operate a turbine engine (10). A mechanical governor (116) responsive to the rotation of a turbine by the combustion of fuel supplied to chamber (16) allows a portio

In the fuel management system having an electronic computer (36) for operating a metering valve (50) through which fuel is supplied to operate a turbine engine (10). A mechanical governor (116) responsive to the rotation of a turbine by the combustion of fuel supplied to chamber (16) allows a portion of the fuel supplied to the metering valve (50) to return to a pump supply (30) when the rotational speed of the shaft (20) connected to turbine (18) exceeds a preset valve. An error detection member (440) responds to a mismatch between the force output of flyweight (130) and a speed feedback roller (408) to prevent the return of the entire quantity of fuel to the pump supply (28) and thereby assure a minimum quantity is always available to operate the turbine engine (10).

대표청구항 ▼

In a fuel management system having a source of supply fuel with a substantially constant fluid pressure, Ps, a metering valve responsive to an input from an electronic computer for supplying fuel under pressure P2 to a combustion chamber in an engine, a bypass valve responsive to the fluid pressure

In a fuel management system having a source of supply fuel with a substantially constant fluid pressure, Ps, a metering valve responsive to an input from an electronic computer for supplying fuel under pressure P2 to a combustion chamber in an engine, a bypass valve responsive to the fluid pressure P2 for allowing a portion of the supply fuel to return to the source while a fluid differential pressure P1-P2 develops across the metering valve, a turbine responding to the combustion of fuel in said combustion chamber by rotating to drive a compressor in said engine and a mechanical governor having a speed sensor responsive to a rotational speed of the turbine above a preselected rotation for lowering the pressure differential P1-P2 across the metering valve by opening a governor valve to allow operational fluid to flow to a return having a fluid pressure PB and modify the fluid pressure P2 presented to the bypass valve to P2P to allow additional fuel to return to the source resulting in a corresponding reduction in the fuel supplied to said combustion chamber independent of the operation of the metering valve by the electronic computer to prevent an overspeed condition in the turbine, the improvement comprising: speed detection means connected to said governor valve for preventing the fluid pressure P2P of the operational fluid from reaching PB to assure that a minimum quantity of operational fluid is available to the combustion chamber.