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:
Sep. 21, 2004
Filed:
Aug. 13, 2001
Helmut Rembold, Stuttgart, DE;
Karl Gmelin, Flein, DE;
Volkmar Goldschmitt, Asperg, DE;
Jens Wolber, Gerlingen, DE;
Mathias Schumacher, Asperg, DE;
Edmund Schaut, Friolzheim, DE;
Uwe Mueller, Hemmingen, DE;
Markus Amler, Leonberg-Gebersheim, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The fuel supply apparatus for supplying fuel to an internal combustion engine has a fuel tank ( ), a first fuel pump ( ) that supplies fuel from the fuel tank to a fuel line ( ), a second fuel pump ( ) that supplies fuel from the fuel line ( ) via a pressurized line to at least one fuel valve ( ) and a fuel return line ( ) that connects the fuel line ( ) to the fuel tank for return of excess fuel. A shut off valve ( ), which is closed at high temperatures, and a pressure regulator valve ( ) are arranged hydraulically in series in the fuel return line ( ). A fuel scavenger line ( ) is provided, by which fuel at high temperatures is returned to the fuel tank ( ). The fuel scavenger line ( ) conducts the fuel back to the fuel tank ( ), at least partially through the second fuel pump ( ) and through a hydraulic resistance. Gas bubble formation is prevented by a high fuel supply pressure and by transfer of heat from the second fuel pump ( ).