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:
Jan. 08, 2002
Filed:
Apr. 20, 2000
Jaroslaw Hlousek, Golling, AT;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An injection pump for generating high fuel pressure in fuel injection systems of internal combustion engines, having a pump piston, which reciprocates in a cylinder having a control bore in order to aspirate fuel from a suction chamber into a high-pressure chamber and act upon the fuel with high pressure. The supply onset of the injection pump is defined by when an upper control edge, which is embodied on the pump piston and is oriented toward the high-pressure chamber passes the control bore, and the end of supply by the injection pump is defined by when a lower control edge, which is embodied on the pump piston and is remote from the high-pressure chamber, passes the control bore. The invention sets forth an injection pump in which the supply onset can be set freely for two different operating modes of the engine. The supply onset is attained in the cylinder by use of a second control bore, which cooperates with a plunge cut in the cylinder and with a piston stop groove that extends longitudinally along the pump piston from the upper control edge.