摘要:
A fuel supply system includes a fuel metering pump and a servo-flow pump that are used to supply fuel to one or more fuel manifolds and one or more fluid-operated actuators, respectively. The fuel metering pump and the servo-flow pump are driven by the same electric motor(s).
摘要:
A shut-down arrangement comprises a shut-off actuation device (20) operable under the control of a control unit (28), a switch (34) whereby a first shut-down signal can be supplied to the control unit (28) and whereby a second shut-down signal can be supplied to the shut-off actuation device (20), and delay means (40) whereby the transmission of the second shut-down signal to the shut-off actuation device (20) is delayed relative to the transmission of the first shut-down signal to the control unit (28).
摘要:
The invention concerns a centrifugal pump (100) driven by being mechanically coupled with the engine (14) has a low pressure input receiving fuel from a fuel circuit (11) of the aircraft and a high pressure output connected to a circuit (120) regulating the flow of fuel supplied to the engine, and an electrically-controlled auxiliary pumping unit (10) having an input connected to the aircraft fuel circuit and an output connected to the flow regulating circuit, to deliver on its fuel output at a predetermined minimum pressure, the pressure of the fuel supplied to the regulating circuit being the highest of those delivered by the centrifugal pump (100) and the auxiliary pumping unit (110).
摘要:
Fuel injection apparatus 54, for a gas turbine engine, includes pilot fuel injection circuits 42 which supply pilot injectors 44 with fuel from a manifold 60, through a pilot control valve 46. The state of the control valve 46 is set by pneumatic pressure in the manifold 56. Main injectors 50 are supplied with fuel from the manifold 60 by main injection circuits 48, through main valves 52. The state of the main valves 52 is set by hydraulic pressure in a manifold 58. Accordingly, control signals to the valves 46, 52 are conveyed independently by means of the pneumatic manifold 56 and the hydraulic manifold 58.