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:
Mar. 12, 2001
Gerhard Geyer, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
Disclosed is a high-pressure assembly for a fuel injection system, including a low-pressure pump, which aspirates fuel from a fuel tank, and a high-pressure pump with a plurality of pump elements. A feed line leads from the low-pressure pump to a suction valve of the applicable pump elements. A flow control valve of the slide type and on the outlet side of it a differential pressure valve are disposed in the feed line. Between the two valves, a return line leading to the fuel tank branches off. The differential pressure valve has an opening pressure which is greater than that of the suction valves. As a result, upon zero pumping of the high-pressure pump, an aspiration of fuel by the pump elements is averted, while in partial filling operation of the high-pressure pump, a largely uniform filling of the pump elements with fuel is achieved.