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:
Feb. 25, 2014
Filed:
Oct. 14, 2011
Jean Thomassin, Ste-Julie, CA;
André Julien, Ste-Julie, CA;
Edwin Schulz, Greenfield Park, CA;
Michael Lanktree, La Prairie, CA;
Jean Thomassin, Ste-Julie, CA;
André Julien, Ste-Julie, CA;
Edwin Schulz, Greenfield Park, CA;
Michael Lanktree, La Prairie, CA;
Pratt & Whitney Canada Corp., Longueuil, Quebec, CA;
Abstract
A method and apparatus for controlling an air input in a rotary engine, including selectively controlling inlet ports communicating with an internal combustion cavity of the engine, the ports located serially downstream of the exhaust port. The inlet ports are controlled to alter air intake at various engine operational stages, such as start up, idle, etc., to allow for varying operational requirements to be met. For example: when a power demand on the engine is lower than a predetermined threshold, control may be effected by opening a primary inlet port and closing a secondary inlet port; and, when the power demand exceeds the predetermined threshold, control may be effected by opening the primary inlet port and opening the secondary inlet port, the secondary inlet port being in communication with the exhaust port throughout portions of the engine revolution to purge exhaust gases.