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:
Dec. 04, 2007
Filed:
Mar. 28, 2006
Sandeep Munshi, Vancouver, CA;
Gordon P. Mctaggart-cowan, Vancouver, CA;
W. Kendal Bushe, Vancouver, CA;
Steven N. Rogak, Vancouver, CA;
Sandeep Munshi, Vancouver, CA;
Gordon P. McTaggart-Cowan, Vancouver, CA;
W. Kendal Bushe, Vancouver, CA;
Steven N. Rogak, Vancouver, CA;
Westport Power Inc., Vancouver, B.C., CA;
University of British Columbia, Vancouver, B.C., CA;
Abstract
A method and apparatus adjust pilot fuel injection timing in relation to a main fuel injection timing into a piston cylinder of an operating gaseous-fuelled direct injection internal combustion engine using high levels of EGR. A set of engine parameters are monitored which determine engine load and engine speed and an indicator of EGR concentration within the intake charge. Pilot fuel timing relative to main fuel injection timing is then adjusted according to the engine parameters. High levels of EGR are shown to be tolerated with relatively limited penalties in relation to other emissions typically found with high EGR by reducing the relative injection timing the pilot fuel as compared to main fuel injection timing.