The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 2026
Filed:
Mar. 20, 2025
Rolls-royce Plc, London, GB;
Andrea Minelli, Derby, GB;
Benjamin J Keeler, Chesterfield, GB;
Craig W Bemment, Derby, GB;
David M Beaven, Nottingham, GB;
Kevin R Mcnally, Derby, GB;
ROLLS-ROYCE PLC, London, GB;
Abstract
A method of operating a gas turbine engine comprising: an engine core comprising a turbine, a compressor, a combustor arranged to combust a fuel, and a core shaft connecting the turbine to the compressor; a fan; an oil loop system arranged to supply oil to cool at least one engine component; a fuel-oil heat exchanger through which the oil and the fuel flow; and a refrigeration cycle apparatus through which the oil in the oil loop system and the fuel flow, the refrigeration cycle apparatus being arranged to transfer further heat from the oil to the fuel, the method comprising controlling the refrigeration cycle apparatus such that fuel temperature on entry to the combustor is higher than a maximum oil temperature within the oil loop system.