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. 04, 2019
Filed:
Jun. 17, 2014
Applicant:
United Technologies Corporation, Hartford, CT (US);
Inventors:
John T. Pech, Canton, CT (US);
W. Dean Kavalkovich, Cobalt, CT (US);
Assignee:
Hamilton Sundstrand Corporation, Windsor Locks, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02C 7/277 (2006.01); F02C 7/268 (2006.01);
U.S. Cl.
CPC ...
F02C 7/277 (2013.01); F02C 7/268 (2013.01); F05D 2260/80 (2013.01); F05D 2260/81 (2013.01); F05D 2260/85 (2013.01); F05D 2270/00 (2013.01); F05D 2270/301 (2013.01); F05D 2270/304 (2013.01);
Abstract
A method of monitoring a gas turbine engine start system includes monitoring a pressure in a starter air duct in communication with a starter air valve which is in communication with an air turbine starter (ATS); identifying an expected transient pressure response in the starter air duct; and identifying the starter air valve as degraded if the expected transient pressure response does not occur after an open command to the starter air valve.