Patent ID: 6981359

Claim:
A fuel system for a gas turbine engine, the fuel system comprising: a high pressure centrifugal pump adapted to pump fuel from a fuel supply; a fuel metering valve adapted to set a metered flow of fuel; a throttle valve adapted to control pressure drop across the fuel metering valve, the throttle valve having at least two variable orifices and a compensation chamber between the variable orifices, the throttle valve being movable to simultaneously change degrees of opening of the variable orifices, the fuel system when in operation adapted to form a fuel pressure in the compensation chamber that acts upon the throttle valve to control position the throttle valve; and a nozzle outlet passage adapted to convey fuel to the gas turbine engine for discharge and combustion, wherein the high pressure centrifugal pump, the fuel metering valve, the throttle valve and the nozzle outlet passage are arranged in fluidic series.