Patent ID: 8286432

Claim:
A turbine engine fuel supply system, comprising: a priority flow line configured to supply fuel to one or more gas turbine engine fuel manifolds to define a primary fuel load; a plurality of secondary fuel loads; a fluid-powered metering pump having a fuel inlet and a fuel outlet, the fluid-powered metering pump coupled to receive fuel at its fuel inlet and, upon receipt of the fuel at its fuel inlet, to (i) rotate at a rotational speed, (ii) discharge the fuel from its fuel outlet for supply to the priority flow line at a flow rate dependent on the rotational speed, and (iii) supply a first drive torque; a mechanically-driven fuel pump having a fuel inlet and a fuel outlet, the mechanically-driven fuel pump fuel outlet in fluid communication with the fluid-powered metering pump fuel inlet, the mechanically-driven fuel pump adapted to receive a second drive torque and operable, upon receipt of the second drive torque, to draw fuel into its fuel inlet and discharge the fuel from its outlet to the plurality of secondary fuel loads and to the fluid-powered metering pump fuel inlet to drive the fluid-powered metering fuel pump; and an electric machine connected to receive the first drive torque from the fluid-powered metering pump and operable, upon receipt thereof, to generate electrical power.