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:
Apr. 14, 2015
Filed:
Jan. 03, 2011
Christian Langenbach, Erbstetten, DE;
Marcus Kristen, Eberdingen, DE;
Christian Langenbach, Erbstetten, DE;
Marcus Kristen, Eberdingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a method for supplying a high-pressure pump () in a fuel injection system of an internal combustion engine with fuel, wherein for delivery and for controlling the delivered quantity a delivery pump () is used, wherein said delivery pump is arranged in a low-pressure circuit () and operated by an electric motor and by means of which, depending on the respective selected engine speed, a certain quantity of fuel is fed to the high-pressure pump (), in which the fuel is first compressed and then fed to a fuel high-pressure accumulator (). According to the invention, the fuel pressure on the intake side of the high-pressure pump () is controlled by means of a pressure control valve (), wherein a supply of the high-pressure pump () with fuel for lubrication and/or cooling via the low-pressure circuit () and the delivery pump () is assured when the pressure control valve () is in the closed position. The invention further relates to a fuel injection system.