Device for economizing fuel supply in a fuel supply circuit
AssigneeSnecma Moteurs
InventorsMarie-Trinité Rose Blot-Carretero, Philippe Galozio, Jean-Marie Brocard, Claude Marcel Maillard
Life of this patent
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Abstract
An aircraft engine fuel supply circuit includes a high pressure pump for supplying the engine fuel injectors and supplying a plurality of servovalves for operating various auxiliary mechanisms. In an in-flight re-ignition configuration, with the rotational speed of the engine drops below a threshold value, a fuel economizer valve receives a command to close, thereby shutting off the supply of high pressure fuel to the servovalves. Consequently, the dimensions of the high pressure pump and other associated components in the circuit, especially heat exchangers, may be reduced.
Claims10
In a fuel supply circuit of an aircraft engine including fuel injectors and a plurality of servovalves, a low pressure pump for raising the pressure of fuel from a tank from a pressure Pf to a pressure Pl, and a high pressure pump for further raising the pressure of the fuel to a relatively high pressure, the high pressure fuel supplying said plurality of servovalves, and supplying said fuel injectors through a pressure regulator, a device connected downstream of said high pressure pump and upstream of said plurality of servovalves for controlling the supply of fuel from said high pressure pump to said plurality of servovalves, said device having an open position in which said high pressure pump is in communication with said plurality of servovalves and a closed position in which said plurality of servovalves is not supplied by said high pressure pump, said device receiving a command to move to said closed position in response to the pressure of said fuel dropping below a predetermined value or in response to the rotational speed of said engine dropping below a predetermined value.
In a fuel supply circuit of an aircraft engine including fuel injectors and a plurality of servovalves, a low pressure pump for raising the pressure of fuel from a tank from a pressure Pf to a pressure Pl, and a high pressure pump for further raising the pressure of the fuel to a relatively high pressure, the high pressure fuel supplying said plurality of servovalves, and supplying said fuel injectors through a pressure regulator, a controllable fuel delivery economizing valve having an inlet and an outlet;
- said inlet being connected to receive the high pressure fuel from the high pressure pump;
- said outlet being connected to some of said plurality of servovalves for the delivery of said high pressure fuel to said servovalves, said economizing valve being movable, on receipt of a command, to shut off said input, thereby cutting off the delivery of said high pressure to said fuel servovales.
Dependencies are inferred from the claim text.