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:
Jan. 04, 2011
Filed:
May. 03, 2007
Andrej Terlecki, Mississauga, CA;
Graham Bridges, Mississauga, CA;
Christopher Day, Burlington, CA;
Mark Laderman, Toronto, CA;
Andrej Terlecki, Mississauga, CA;
Graham Bridges, Mississauga, CA;
Christopher Day, Burlington, CA;
Mark Laderman, Toronto, CA;
Pratt & Whitney Canada Corp., Longueuil, Quebec, CA;
Abstract
A method of starting a turbine engine at a first engine speed value which is lower than a second engine speed value designed for a normal engine starting operation, comprises varying a fuel flow into a combustor of the engine to start the engine in repeatedly alternating speed acceleration and deceleration cycles in order to create an engine speed augmentation in each of the speed acceleration and deceleration cycles, thereby achieving the second engine speed value while preventing the engine from being overheated, and then beginning the normal engine starting operation.