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:
Oct. 07, 1997
Filed:
Jul. 05, 1995
Alvin Arthur Powell, Burton, MI (US);
James Witherspoon Mitchell, Jr, Wayne, MI (US);
Robert Eugene Wattleworth, Canton, MI (US);
Kyle Lance Petrich, Minneapolis, MN (US);
Brian Michael Blanton, Dearborn, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
In one embodiment of the present invention, a 'returnless' fuel system for a motor vehicle is disclosed. A 'series-pass' fuel pressure regulator in the system provides fuel of a regulated pressure to a fuel rail comprising at least one fuel injector. A 'bypass' fuel pressure regulator provides fuel with a regulated pressure to the series pass regulator. An in-line fuel filter is located downstream from the bypass regulator, such that only the fuel which reaches the series-pass regulator is filtered. A check valve is located downstream from the bypass regulator as well, to prevent fuel pressure bleed-down through the fuel pump and the bypass regulator. A pressure relief valve is coupled to allow fuel with a pressure above a predetermined value to flow around the check valve.