Fuel circuit of an aircraft engine with a fuel recirculating valve controlled by a pressure differential of a low-pressure pump of the fuel system
AssigneeSafran Aircraft Engines
InventorsNicolas Gomes, Lauranne Mottet, Antoine Veyrat-Masson
Life of this patent
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Abstract
A fuel circuit of an aircraft engine including a fuel tank; an engine fuel system including a low-pressure pump and a high-pressure pump, and a fuel recirculating pipeline connected to the engine fuel system; and a fuel recirculating valve arranged so as to switch between an open position and a closed position according to the pressure differential of the low-pressure pump, the valve being able to obstruct the fuel recirculating pipeline in the closed position, and to bring the fuel recirculating pipeline into communication with the fuel tank in the open position.
Claims10
A fuel circuit of an engine of an aircraft comprising:
- a fuel tank;
- an engine fuel system comprising:
- a low-pressure pump connected to the fuel tank, the low-pressure pump being capable of raising a pressure of a low-pressure stream of fuel from the fuel tank by a pressure difference which is variable;
- and
- a high-pressure pump connected to the low-pressure pump, the high-pressure pump being capable of converting, the low-pressure stream of fuel into a high-pressure stream of fuel;
- a fuel return line connected to the engine fuel system, the fuel return line being capable of bringing the high-pressure stream into the fuel tank;
- and
- a motive flow valve arranged to switch between an open position and a closed position, as a function of the pressure difference of the low-pressure pump, the motive flow valve being capable of blocking the fuel return line in the closed position, and of putting the fuel return line in communication with the fuel tank, in the open position.
Dependencies are inferred from the claim text.