Patents by Inventor Werner Happenhofer

Werner Happenhofer 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).

  • Patent number: 6820588
    Abstract: The invention relates to a method for controlling an internal combustion engine with a fuel injection system which can comprise, in addition to a main injection quantity, an additional amount of pre-injected and/or post-injected fuel for each injection pulse for each combustion chamber for each combustion cycle at a given injection time. A theoretical torque is determined from an accelerator pedal value, rotational speed and air or fuel mass flow while taking into account a factor from a family of characteristics. According to the invention, the calculated theoretical torque is corrected in the case of a pre-injected or post-injected fuel mass flow by taking into account, in a correction factor, a value for a time or phase difference of the amount of pre-injected or post-injected fuel and the main injection quantity for each cycle.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: November 23, 2004
    Assignee: Siemens Aktiengesellschaft
    Inventors: Werner Happenhofer, Hong Zhang
  • Publication number: 20040050360
    Abstract: The invention relates to a method for controlling an internal combustion engine with a fuel injection system which can comprise, in addition to a main injection quantity, an additional amount of pre-injected and/or post-injected fuel for each injection pulse for each combustion chamber for each combustion cycle at a given injection time. A theoretical torque is determined from an accelerator pedal value, rotational speed and air or fuel mass flow while taking into account a factor from a family of characteristics. According to the invention, the calculated theoretical torque is corrected in the case of a pre-injected or post-injected fuel mass flow by taking into account, in a correction factor, a value for a time or phase difference of the amount of pre-injected or post-injected fuel and the main injection quantity for each cycle.
    Type: Application
    Filed: June 26, 2003
    Publication date: March 18, 2004
    Inventors: Werner Happenhofer, Hong Zhang
  • Patent number: 6412170
    Abstract: A first sleeve and a second sleeve are put onto the shaft at a predetermined axial distance apart and are pressed radially. The shaft is encapsulated between the first and the second sleeve with a thermoplastic in such a way that a vane body, which has at least one aperture, is formed. The vane body is encapsulated with a sealing compound in such a way that a sealing lip is formed on the vane body at the margins.
    Type: Grant
    Filed: September 7, 1999
    Date of Patent: July 2, 2002
    Assignee: Siemens Aktiengesellschaft
    Inventors: Werner Happenhofer, Mathias Scheytt, Helmut Schwaiger, Stefan Schmid
  • Patent number: 6279528
    Abstract: Inlet pipes extend from a collector to the cylinder inlets of the internal combustion engine. The inlet pipes are formed with mutually facing openings in their adjacent walls. Control flaps each have a shaft, which is respectively provided with a damping element and is mounted by way of the damping elements in a bearing bush. The openings in the inlet pipes are selectively closed and opened with the control flaps.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: August 28, 2001
    Assignee: Siemens Aktiengesellschaft
    Inventors: Werner Happenhofer, Mathias Scheytt, Stefan Schmidt, Helmut Schwaiger