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:
Nov. 26, 2024
Filed:
Jul. 31, 2023
Pratt & Whitney Canada Corp., Longueuil, CA;
Xuening Lu, Oakville, CA;
Etienne Plamondon, Candiac, CA;
PRATT & WHITNEY CANADA CORP., Longueuil, CA;
Abstract
An engine assembly for an aircraft propulsion system includes an engine, a rotational assembly, a gearbox assembly, and a controller. The engine includes an engine shaft. The rotational assembly includes a shaft, a bladed compressor rotor, and a bladed turbine rotor. The shaft interconnects the bladed compressor rotor and the bladed turbine rotor. The gearbox assembly includes a transmission assembly. The transmission assembly includes a first pump, a second pump, and a conduit circuit connecting the first pump and the second pump in fluid communication. The first pump is coupled with the engine shaft. The first pump is a variable displacement pump. The second pump is coupled with the rotational assembly. The controller is configured to identify a target rotation speed for the rotational assembly with an outer closed loop, identify a control signal with an inner closed loop using the target rotation speed, and controlling a displacement of the first pump using the control signal.