Patents by Inventor Frank Widmann

Frank Widmann 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).

  • Device and method for identifying defects in a fuel injection system
    Patent number: 7137294
    Abstract: The invention makes the identification of defects possible in a fuel injection system comprising a fuel accumulator, a continuously operating high-pressure pump and a fuel pressure control valve. By evaluating the high-frequency portion of the fuel pressure course in the fuel accumulator, it can be indicated with a high probability which of the components are defective whereby this is assisted, in particular, by additional evaluations performed during a diagnostic method.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: November 21, 2006
    Assignee: Siemens Aktiengesellschaft
    Inventors: Gerhard Eser, Frank Widmann
  • Device and method for identifying defects in a fuel injection system
    Publication number: 20060144130
    Abstract: The invention makes the identification of defects possible in a fuel injection system comprising a fuel accumulator, a continuously operating high-pressure pump and a fuel pressure control valve. By evaluating the high-frequency portion of the fuel pressure course in the fuel accumulator, it can be indicated with a high probability which of the components are defective whereby this is assisted, in particular, by additional evaluations performed during a diagnostic method.
    Type: Application
    Filed: October 9, 2003
    Publication date: July 6, 2006
    Inventors: Gerhard Eser, Frank Widmann
  • Combustion engine having a variable compression ratio
    Patent number: 5595146
    Abstract: A combustion engine. The engine includes an engine housing; at least one cylinder disposed in the engine housing; and a crank drive including: a crankshaft having a crank; and a piston being axially displaceable within the cylinder. The crank drive further includes a connecting rod which has an upper connecting rod part hinged to the piston; and a lower connecting rod part hinged to the crank. The lower connecting rod part is hinged to the upper connecting rod part. A central joint hinges the upper connecting rod part and the lower connecting rod part to one another, a longitudinal axis of the upper connecting rod part further being defined by a line connecting the central joint with a hinge joint of the upper connecting rod part to the piston.
    Type: Grant
    Filed: January 24, 1995
    Date of Patent: January 21, 1997
    Assignee: FEV Motorentechnik GmbH & Co. Kommanditgesellschaft
    Inventors: Christoph Bollig, Hans-Joerg Hermanns, Torsten Schellhase, Frank Widmann