Patents by Inventor Dirk Hoefner

Dirk Hoefner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • FUEL SYSTEM FOR AN INTERNAL COMBUSTION ENGINE
    Publication number: 20120279474
    Abstract: In a fuel system of an internal combustion engine, a low-pressure delivery unit for the fuel, at least indirectly delivers fuel to at least one low-pressure injection device. The fuel system further provides a high-pressure delivery unit, which has a drive region and a delivery region and at least indirectly delivers fuel to at least one high-pressure injection device. According to the invention, the fuel is first delivered by the low-pressure delivery unit to the drive region of the high-pressure delivery unit and from there onward to the low-pressure injection device and/or to the delivery region of the high-pressure delivery unit.
    Type: Application
    Filed: June 9, 2011
    Publication date: November 8, 2012
    Inventors: Dirk Hoefner, Sven Troester, Bernd Schroeder, Berthold Pfuhl, Maximilian Stichlmeir, Martin Laich
  • High pressure injection arrangement for an internal combustion engine with direct injection
    Patent number: 8151760
    Abstract: The invention relates to a high pressure injection arrangement for an internal combustion engine with direct injection, with an injection valve and a support element, which supports the injection valve in the installed state on a seat of an internal combustion engine. It is provided that a spring element is arranged between the injection valve and the support element.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: April 10, 2012
    Assignee: Audi AG
    Inventor: Dirk Hoefner
  • High Pressure Injection Arrangement for an Internal Combustion Engine with Direct Injection
    Publication number: 20100006060
    Abstract: The invention relates to a high pressure injection arrangement for an internal combustion engine with direct injection, with an injection valve and a support element, which supports the injection valve in the installed state on a seat of an internal combustion engine. It is provided that a spring element is arranged between the injection valve and the support element.
    Type: Application
    Filed: July 9, 2009
    Publication date: January 14, 2010
    Inventor: Dirk Hoefner