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:
May. 03, 2016
Filed:
Feb. 03, 2011
Friedrich Boecking, Stuttgart, DE;
Friedrich Boecking, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a fuel injection system of an internal combustion engine, comprising a presupply pump () and a downstream high-pressure pump (), which is connected to a high-pressure accumulator () and wherein the high pressure accumulator () is operatively connected to at least one fuel injector (). According to the invention, a fuel injection system is provided and a method for operating such a fuel system is described which avoids the disadvantage of a slow pressure build-up in the high-pressure accumulator () and rather allows a rapid start of the internal combustion engine. This is achieved in that the presupply pump () is designed to generate a delivery pressure by which a fuel injection by means of the fuel injector () is effected, at least in a defined operating state of the internal combustion engine. At the delivery pressure generated by the presupply pump (), the fuel injector is prompted to open by a control device. A corresponding method for operating the fuel injection system provides for the presupply pump () to be operated in a starting operating mode until the internal combustion engine has been started, and after the internal combustion engine has been started to be operated in a presupply operating mode.