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:
Feb. 04, 2003
Filed:
Mar. 11, 1999
Bernd Streicher, Filderstadt, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A radial piston pump for high-pressure fuel delivery in fuel injection systems of internal combustion engines, which includes a common rail injection system. The system includes a drive shaft that is supported in a pump housing and is embodied eccentrically for driving a number of pistons that are disposed radially in respective cylinder chambers into a reciprocating motion in the radial direction in the cylinder chambers upon rotation of the drive shaft. For each piston, a metallic housing part which constitutes the respective cylinder chamber is provided with a fuel intake opening and a fuel outlet opening which are controlled by intake and outlet valves. In order to uncouple the high-pressure sealing points from one another and to respectively define them in a statically exact fashion, the pump is embodied so that the housing part rests with a flat contact surface against a flat contact surface of the metallic housing base body. A projecting section of the housing part is oriented toward the drive shaft and extends through a radial opening of the housing base body in the direction toward the drive shaft. A fuel outlet opening discharges into the flat contact surface and is flush with a second outlet opening in the housing base body. A metallic high-pressure sealing element is provided in a widened mouth region of the fuel outlet opening in the housing part. The metallic high-pressure sealing element is tightened against the housing base body by way of screws in such a way that the high-pressure side is sealed through the clamping of the high-pressure sealing element.