Fuel systems for aircraft engines

    公开(公告)号:US12110827B1

    公开(公告)日:2024-10-08

    申请号:US18311660

    申请日:2023-05-03

    CPC classification number: F02C7/236 F02C7/32 F05D2220/323 F05D2270/07

    Abstract: A turbo engine for an aircraft includes a gas turbine engine having a combustion section and a fuel system to provide pressurized fuel to the combustion section. The fuel system includes a fuel tank and a boost pump and a main pump driven by an accessory gearbox that is powered by a shaft of the turbo engine. The boost pump and the main pump are arranged in series. The fuel system also includes an auxiliary pump and a controller to operate the fuel system in (1) a first mode in which the boost pump and the main pump produce pressurized fuel for the turbo engine and the auxiliary pump is deactivated, and (2) a second mode in which the auxiliary pump is activated and produces the pressurized fuel for the turbo engine while bypassing the boost pump and the main pump.

    AIRCRAFT FUEL SYSTEM
    6.
    发明公开

    公开(公告)号:US20240174375A1

    公开(公告)日:2024-05-30

    申请号:US18316450

    申请日:2023-05-12

    CPC classification number: B64D37/32 B64D37/34

    Abstract: An aircraft fuel system includes a first fuel storage tank arranged to store a first fuel, a second fuel storage tank arranged to store a reduced oxygen fuel, and a fuel tank inerting system arranged to provide a reduced oxygen gas through a fuel contained within the second fuel storage tank to generate the reduced oxygen fuel within the second fuel storage tank. The fuel tank inerting system may include a fuel tank sparging system to inject the reduced oxygen gas directly into the fuel contained within the second fuel storage tank to generate the reduced oxygen fuel.

    FLOW-METERING FUEL SYSTEMS AND RELATED METHODS

    公开(公告)号:US20240084741A1

    公开(公告)日:2024-03-14

    申请号:US18308435

    申请日:2023-04-27

    CPC classification number: F02C9/263 F02C7/222 F02C9/28 F02C7/232

    Abstract: Flow-metering fuel systems and related methods are disclosed. An example apparatus includes a pipe defining a flow path for fuel, the pipe fluidly coupled to a combustor, a first portion of the pipe having a first cross-sectional area, a second portion of the pipe having a second cross-sectional area smaller than the first cross-sectional area, the second portion downstream of the first portion, and an actuator to adjust a flow rate of the fuel in the pipe based on a first pressure of the fuel in the first portion of the pipe, a second pressure of the fuel in the second portion of the pipe, and a temperature of the fuel.

    FUEL SYSTEMS FOR AIRCRAFT ENGINES

    公开(公告)号:US20250067217A1

    公开(公告)日:2025-02-27

    申请号:US18455316

    申请日:2023-08-24

    Abstract: A turbo engine for an aircraft includes a gas turbine engine having a fuel system to provide fuel to a combustion section. The fuel system includes a variable displacement pump driven by an accessory gearbox that is powered by a shaft of the gas turbine engine. The variable displacement pump has an inlet side and an outlet side. The variable displacement pump includes an actuator configured to adjust a discharge flow rate of the variable displacement pump. The fuel system also includes a fuel metering valve configured to receive pressurized fuel from the variable displacement pump and control a flow rate of the pressurized fuel to the combustion section. The fuel system further includes a bypass valve fluidly coupling the outlet side and the inlet side of the variable displacement pump to direct an excess portion of the pressurized fuel at the outlet side back to the inlet side.

    Flow-metering fuel systems and related methods

    公开(公告)号:US12234778B2

    公开(公告)日:2025-02-25

    申请号:US18308435

    申请日:2023-04-27

    Abstract: Flow-metering fuel systems and related methods are disclosed. An example apparatus includes a pipe defining a flow path for fuel, the pipe fluidly coupled to a combustor, a first portion of the pipe having a first cross-sectional area, a second portion of the pipe having a second cross-sectional area smaller than the first cross-sectional area, the second portion downstream of the first portion, and an actuator to adjust a flow rate of the fuel in the pipe based on a first pressure of the fuel in the first portion of the pipe, a second pressure of the fuel in the second portion of the pipe, and a temperature of the fuel.

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