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    METHOD OF CONTRAIL MITIGATION AND AIRCRAFT HAVING CONTRAIL MITIGATION FUNCTIONALITY
    41.
    发明申请
    METHOD OF CONTRAIL MITIGATION AND AIRCRAFT HAVING CONTRAIL MITIGATION FUNCTIONALITY 有权

    公开(公告)号：US20220403790A1

    公开(公告)日：2022-12-22

    申请号：US17829896

    申请日：2022-06-01

    Applicant: ROLLS-ROYCE plc

    Inventor： Paul FLETCHER ,  Peter SWANN

    IPC: F02C9/28 ,  F02C9/42 ,  F02C9/44

    Abstract: A method of mitigating contrails produced by an aircraft having a set of gas turbine engines, comprises the steps of (i) for each engine in a first subset of the engines, reducing the operating efficiency of the engine to produce a reduction in thrust provided by that engine and (ii) for each engine in a second subset, increasing the fuel flow to the engine to increase the thrust provided by that engine, the set of at least two gas turbine engines consisting of the first and second subsets. The method provides for contrail mitigation action by means of engine operating efficiency reduction to be directed to a first subset of engines for which contrail mitigation per unit engine operating efficiency reduction is greatest, the resulting reduction in thrust provided by such engines being at least partially compensated by increasing fuel flow to engines of the second subset.

    System for confirming shutdown of an aircraft engine
    42.
    发明授权
    System for confirming shutdown of an aircraft engine 有权

    公开(公告)号：US11486318B2

    公开(公告)日：2022-11-01

    申请号：US17317321

    申请日：2021-05-11

    Applicant: Airbus Operations (S.A.S.)

    Inventor： Patrick Zaccaria ,  David Boyer

    IPC: F02C9/44 ,  F02C7/232 ,  F01D21/00 ,  B64D31/04 ,  B64D31/06

    Abstract: To control an engine shutdown in an aircraft, a control system includes a fuel supply shut-off member, a control member with a set of switches, a first switch on an electrical power supply link of the fuel supply shut-off member and second switches connected to avionics of the aircraft, the set of switches switching position on an engine shutdown command. An engine shutdown confirmation unit includes a third switch on the electrical power supply link, the third switch in open position by default. The engine shutdown confirmation unit includes electronic circuitry configured to switch the third switch over to closed position when a predefined quantity Q of switches of the control member switches position within a sliding window of predefined duration and, otherwise, keeps the third switch in open position. Thus, it is ensured that the engine shutdown is intentional.

    Method of controlling gas generator power and torque output
    43.
    发明授权
    Method of controlling gas generator power and torque output 有权

    公开(公告)号：US11162433B2

    公开(公告)日：2021-11-02

    申请号：US16019944

    申请日：2018-06-27

    Applicant: GE Avio S.r.l.

    Inventor： Lorenzo Cipolla ,  Giampaolo Gabbi ,  Simone Castellani ,  Federico Dellavalle ,  Felice Felippone

    IPC: F02C9/26 ,  F02C9/56 ,  B64D31/06 ,  B64C11/30 ,  B64D37/00 ,  F02C9/28 ,  F02C9/00 ,  F02C9/44

    Abstract: The present disclosure is directed to a system for controlling an output of a gas generator via an operator manipulated input device. The system includes one or more sensors measuring one or more environmental conditions, a gas generator shaft speed, and a power turbine torque. The system further includes an operator manipulated input device and one or more controllers including one or more processors and one or more memory devices. The one or more memory devices stores instructions that when executed by the one or more processors cause the one or more processors to perform operations. The operations include receiving, via an operator manipulated input device, a throttle lever position defining at least an idle position, a takeoff position, and one or more intermediate positions therebetween; receiving, via one or more sensors, one or more environmental conditions, wherein the environmental condition includes one or more of an ambient air temperature, an ambient air pressure, and an ambient airflow rate; determining, via the controller, a first commanded fuel flow of the gas generator based on a gas generator speed output curve based at least on the throttle lever position, the one or more environmental conditions, and a coefficient reference table; determining, via the controller, a second commanded fuel flow of the gas generator based on a power turbine torque output curve based at least on the one or more environmental conditions; and generating, via the gas generator, a gas generator output based on the first commanded fuel flow or the second commanded fuel flow.

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