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. 21, 2012
Filed:
May. 19, 2009
Bing Tong, San Diego, CA (US);
Timothy J. Sullivan, La Mesa, CA (US);
Paul E. Hilgeman, Santee, CA (US);
Tarrence L. Mack, Santee, CA (US);
Bing Tong, San Diego, CA (US);
Timothy J. Sullivan, La Mesa, CA (US);
Paul E. Hilgeman, Santee, CA (US);
Tarrence L. Mack, Santee, CA (US);
Hamilton Sundstrand Corporation, Rockford, IL (US);
Abstract
The system and method of the present invention provides stepping speed control of a gas turbine engine to reliably light-off a gas turbine engine. During starting, the speed of the gas turbine engine is incremented by stepped amounts through the light-off window from a minimum speed value to a maximum speed value, with the speed of the gas turbine dwelling at each stepped value for a period of time before incrementing the speed of the engine to the next stepped level. If the gas turbine engine is stepped through the entire light-off window without success, the controller decreases the speed of the gas turbine engine to the minimum value and begins the process again. The process continues until successful light-off is initiated or until the light-off window is traversed a certain number of times, after which the start process is aborted.