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公开(公告)号：US20230323821A1
公开(公告)日：2023-10-12
申请号：US18125431
申请日：2023-03-23
Applicant: ROLLS-ROYCE PLC
Inventor： Craig W BEMMENT , Benjamin J KEELER , Paul W FERRA , Alastair G HOBDAY , Kevin R MCNALLY , Andrea MINELLI , Martin K. YATES
IPC: F02C9/28
CPC classification number: F02C9/28 , F05D2220/323 , F05D2270/30
Abstract: A method of refuelling an aircraft comprising a gas turbine engine and a fuel tank arranged to provide fuel to the gas turbine engine comprises obtaining an amount of energy required for an intended flight profile; obtaining a calorific value of fuel available to the aircraft for refuelling; calculating the amount of the available fuel needed to provide the required energy; and refuelling the aircraft with the calculated amount of the available fuel. The calculating the amount of the available fuel needed to provide the required energy may comprise obtaining an energy content of fuel already in the fuel tank and subtracting that from the determined amount of energy required for the intended flight profile.
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公开(公告)号：US20230193832A1
公开(公告)日：2023-06-22
申请号：US18099490
申请日：2023-01-20
Applicant: ROLLS-ROYCE PLC
Inventor： Peter SWANN , David M. BEAVEN , Craig W. BEMMENT , Alastair G. HOBDAY , Benjamin J. KEELER , Christopher P. MADDEN , Martin K. YATES
CPC classification number: F02C9/00 , B64D47/00 , G01N21/3577 , B64D27/10 , G01N21/33 , G01N33/287 , G01N21/64 , B64D37/00
Abstract: A method of generating a maintenance schedule for an aircraft including one or more gas turbine engines powered by an aviation fuel. The method includes: determining one or more fuel characteristics of the fuel; and generating a maintenance schedule according to the one or more fuel characteristics. Also disclosed is a method of maintaining an aircraft, a maintenance schedule generation system and an aircraft.
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公开(公告)号：US20230193777A1
公开(公告)日：2023-06-22
申请号：US17853405
申请日：2022-06-29
Applicant: ROLLS-ROYCE plc
Inventor： Peter SWANN , David M. BEAVEN , Craig W. BEMMENT , Alastair G. HOBDAY , Benjamin J. KEELER , Christopher P. MADDEN , Martin K. YATES
CPC classification number: F01D21/003 , F02C9/28 , F05D2220/323 , F05D2260/80 , F05D2270/0831 , F05D2270/708 , F05D2270/804
Abstract: The present application discloses a method of determining one or more fuel characteristics of an aviation fuel suitable for powering a gas turbine engine of an aircraft. The method comprises: determining, during use of the gas turbine engine, one or more exhaust content parameters by performing a sensor measurement on an exhaust of the gas turbine engine; and determining one or more fuel characteristics of the fuel based on the one or more exhaust parameters. Also disclosed is a fuel characteristic determination system, a method of operating an aircraft, and an aircraft.
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公开(公告)号：US20180372321A1
公开(公告)日：2018-12-27
申请号：US16011865
申请日：2018-06-19
Applicant: ROLLS-ROYCE PLC
Inventor： Martin K. YATES , Daniel J. BICKLEY
IPC: F23R3/34 , F23R3/28 , F23K5/14 , F23K5/06 , F02C9/34 , F02C7/22 , F02C7/228 , F02C7/232 , F02C9/26 , F02C7/14
Abstract: A combustion staging system has: a splitter; pilot and mains fuel manifolds; mains flow control valves; and fuel servo line. Each mains flow control valve has a chamber containing a piston, the chamber to a piston mains side fed by the mains fuel manifold, and the chamber to a piston servo side fed by the servo line. The piston has an open pilot-and-mains position allowing flow from the chamber mains side to the respective injector mains discharge orifice. The piston prevents flow from the chamber mains side. The piston is movable under a pressure change in the servo line relative to the mains fuel manifold. The system has a servo pump and a hydraulic motor driving it. The servo pump changes fuel pressure. Motive power for the hydraulic motor is fuel diverted from a fuel pump high pressure output, the motor returning the diverted fuel to a low pressure input.
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