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. 06, 2001
Filed:
Jun. 30, 1998
Murray F. Busato, Chatham, CA;
John Edward Cook, Chatham, CA;
Siemens Canada Limited, Mississauga, CA;
Abstract
An evaporative emission control system for a fuel system of an internal combustion engine of an automotive vehicle has a purge flow path through which an evaporative emission containment space of the fuel system for containing volatile fuel vapors is purged to an intake system of the engine. A purge valve controls purge flow through the purge flow path. When the intensity of intake system vacuum falls below a threshold, an electric-motor-driven blower operates to creates a pressure rise in the purge flow path upstream of the purge valve and downstream of the containment space. A differential pressure sensor senses pressure differential across the purge valve, and the purge valve includes an integral valve position sensor, both sensors providing feedback signals to a controller than controls operation of both the purge valve and the blower.