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:
May. 11, 2021
Filed:
Feb. 13, 2019
Pratt & Whitney Canada Corp., Longueuil, CA;
Michael Youssef, Mississauga, CA;
Alexandre Charest, Montreal, CA;
Giancarlo Zingaro, Pointe-Claire, CA;
Jasraj Chahal, Lasalle, CA;
Carmine Lisio, Laval, CA;
Darragh McGrath, Montreal, CA;
PRATT & WHITNEY CANADA CORP., Longueuil, CA;
Abstract
Methods and systems for starting an aircraft propulsion engine are described herein. Operation of the engine is controlled by an engine controller having a first channel and a second channel. An engine start request is received on the second channel while the first channel is inactive. It is determined which one of the first channel and the second channel was used to conduct a last successful engine start. Responsive to determining that the last successful engine start was conducted on the second channel, a predetermined time period is waited to elapse and for the first channel to reinitialize before commanding, via the first channel, an engine start based on the engine start request.