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:
Jun. 17, 2025
Filed:
Apr. 12, 2024
Rolls-royce Plc, London, GB;
Craig W Bemment, Derby, GB;
Alastair G Hobday, Derby, GB;
Benjamin J Keeler, Chesterfield, GB;
Christopher P Madden, Derby, GB;
Andrea Minelli, Derby, GB;
Andrew T Smith, Derby, GB;
Peter Swann, Derby, GB;
Martin K Yates, Derby, GB;
ROLLS-ROYCE plc, London, GB;
Abstract
A method of operating a gas turbine engine including an engine core including a turbine, compressor, combustor to combust a fuel, and core shaft connecting the turbine and compressor; a fan upstream of the engine core; a fan shaft; a gearbox that receives an input from the core shaft and outputs drive to the fan via the fan shaft; a primary oil loop system to supply oil to the gearbox; and a heat exchange system. The method includes controlling the heat exchange system to adjust fuel viscosity to be lower than or equal to 0.58 mm/s on entry to the combustor at cruise conditions.