Patents by Inventor Alexander Stefani

Alexander Stefani 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 for controlling a piezoelement injection valve
    Patent number: 6486587
    Abstract: In a device for controlling an injection valve which can be operated by a piezo-actuator and which comprises a charging and discharging circuit for the controlled charging of the piezo-actuator to a certain piezo-voltage, the charging and discharging circuit includes a power supply with a multitude of voltage levels which correspond to various valve opening positions and a switching device for the controlled switch-over between the plurality of voltage levels.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: November 26, 2002
    Assignee: DaimlerChrysler AG
    Inventors: Rolf Klenk, Klaus Rössler, Alexander Stefani, Guido Vent
  • Device for controlling a piezoelement injection valve
    Publication number: 20020011762
    Abstract: In a device for controlling an injection valve which can be operated by a piezo-actuator and which comprises a charging and discharging circuit for the controlled charging of the piezo-actuator to a certain piezo-voltage, the charging and discharging circuit includes a power supply with a multitude of voltage levels which correspond to various valve opening positions and a switching device for the controlled switch-over between the plurality of voltage levels.
    Type: Application
    Filed: July 27, 2001
    Publication date: January 31, 2002
    Inventors: Rolf Klenk, Klaus Rossler, Alexander Stefani, Guido Vent