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:
Mar. 18, 2008
Filed:
Mar. 24, 2006
Randall Mark, Vancouver, CA;
Randall Mark, Vancouver, CA;
Westport Power Inc., Vancouver, BC, CA;
Abstract
A pilot fuel injection valve is mountable in a cylinder head of an engine and injects a liquid pilot fuel directly into a combustion chamber. The pilot fuel injection valve comprises a cooling system to keep the pilot fuel at a temperature that is lower than the lowest initial boiling point for the pilot fuel that occurs inside the fuel injection valve. The pilot fuel injection valve further comprises a thermally insulated nozzle having an outer surface that is not cooled by the cooler cylinder head and the cooler pilot fuel held inside the fuel injection valve. During operation, the nozzle's outer surface can be heated to a temperature that is not significantly lower than the final boiling point of the pilot fuel so that a significant amount of pilot fuel does not condense on the nozzle surface during engine operation.