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. 22, 2007
Filed:
Jul. 28, 2004
Thomas Ludwig, Huenxe, DE;
Michael Mennicken, Wimsheim, DE;
Andreas Kellner, Tamm, DE;
Joachim Boltz, Stuttgart, DE;
Falko Bredow, Remseck, DE;
Thomas Ludwig, Huenxe, DE;
Michael Mennicken, Wimsheim, DE;
Andreas Kellner, Tamm, DE;
Joachim Boltz, Stuttgart, DE;
Falko Bredow, Remseck, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The fuel injection system has a high-pressure pump that delivers fuel to an accumulator and fuel supply pump delivers fuel to the suction side of the high-pressure pump, with a fuel metering unit between the fuel supply and high-pressure pumps to variably adjust the fuel quantity taken in by the high-pressure pump. The accumulator is connected to at least one fuel injector and a return leads from the fuel injector(s). The fuel return from the injector(s) feeds into the connection between the fuel supply pump and the fuel metering unit. A connection controlled by a pressure valve leads from the fuel return to a discharge region. The high-pressure pump only draws fuel from the fuel return in operating states in which the fuel quantity delivered by the fuel supply pump is less than the required intake quantity of the high-pressure pump.