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:
Jul. 23, 1996
Filed:
Sep. 23, 1993
Helmut Laufer, Gerlingen, DE;
Anton Karle, Villingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A fuel injection pump has a pump plunger (13), which is driven by a drive shaft (15) via a cam gear (14) at least in an axial stroke movement and in so doing generates a fuel injection pressure in a pump work space (16), and a magnet valve (30) blocking or releasing the pump work space (16) relative to a relief duct (26). The start of delivery of the pump plunger is determined by the closing of the relief duct (26) and the end of delivery of the pump plunger (13) is determined by the release of the relief duct (26). To prevent the so-called jumping off of the plunger in the cam gear (14), the magnet valve (30) is controlled after the end of delivery in such a way that a residual pressure lying below the injection pressure is built up in the pump work space (16) until the top dead center point is reached (FIG. 1).