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:
Aug. 04, 2020
Filed:
May. 31, 2017
Applicant:
Pratt & Whitney Canada Corp., Longueuil, CA;
Inventors:
Assignee:
Pratt & Whitney Canada Corp., Longueuil, Quebec, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02C 9/26 (2006.01); F02C 9/44 (2006.01); F02C 9/32 (2006.01); B64D 31/06 (2006.01); F02C 9/28 (2006.01);
U.S. Cl.
CPC ...
F02C 9/44 (2013.01); B64D 31/06 (2013.01); F02C 9/26 (2013.01); F02C 9/263 (2013.01); F02C 9/285 (2013.01); F02C 9/32 (2013.01); F05D 2220/323 (2013.01); F05D 2260/96 (2013.01); F05D 2270/08 (2013.01); F05D 2270/14 (2013.01);
Abstract
Herein provided are methods and systems for reducing an acoustic signature of a gas turbine engine. An acceleration command for the engine is received. In response to receiving the acceleration command: a fuel flow to the engine is increased for a first predetermined time period; subsequent to the first predetermined time period, the fuel flow to the engine is reduced for a second predetermined time period; and subsequent to the second predetermined time period, the fuel flow to the engine is increased for a third time period.