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:
Jun. 24, 2003
Filed:
Jun. 19, 2002
David L. Knight, Cass City, MI (US);
Ronald H. Roche, Cass City, MI (US);
Roger N. Smith, Caro, MI (US);
Walbro Engine Management, L.L.C., Cass City, MI (US);
Abstract
A fuel pump assembly for use with a fuel injected combustion engine has a liquid cooled vapor separator from which conditioned fuel is drawn by a high pressure fuel pump. The vapor separator has an internal heat conductive sleeve which defines a fuel chamber or reservoir. A coolant chamber surrounds the heat conducting sleeve and is carried laterally between an exterior housing of the fuel pump assembly and the internal sleeve. A coiled baffle disposed within the coolant chamber forms a coolant channel which spirals about the sleeve. The channel has a first end which communicates with a coolant passage inlet and an opposing second end which communicates with a coolant passage outlet carried by the housing. The introduction of the baffle, therefore the channeling of coolant flow through the spiraling channel, improves the fuel cooling efficiency of the vapor separator by eliminating hot spots created by stagnate or non-flowing coolant areas within the coolant chamber.