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:
Aug. 03, 2004
Filed:
Feb. 28, 2003
Sam Raghuma Reddy, West Bloomfield, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An engine fuel system includes liquid fuel delivery for normal engine operation and fuel vapor generation for use in cold starting on fuel vapor alone. A fuel vapor generator, preferably in a vehicle fuel tank, includes a fuel vapor collector connected in a return line between a pressure regulator and an in-tank fuel pump. A charging portion includes a pump for conducting fuel vapor from the collector to the cold start canister and a return line to provide circulation of the vapor into the canister. A vapor delivery portion includes a delivery line between the cold start canister and an air inlet of an associated engine. An air inlet line delivers air to the canister during cold starting. A subsystem is formed by the fuel vapor generator connected in a circuit with the in-tank fuel pump and the pressure regulator return fuel line.