Patents by Inventor Juergen Schieman

Juergen Schieman 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).

  • Method for operating an electrohydraulic valve control system of an internal combustion engine, computer program, and control, and regulating unit for operating an internal combustion engine
    Publication number: 20040069255
    Abstract: An electrohydraulic valve control (10) of an internal combustion engine includes at least one actuator (24) that acts on a gas exchange valve (38). This actuator (24) in turn has at least one working chamber (30), which in order to switch the actuator (24) from a first position into a second position, is connected to a high-pressure hydraulic accumulator (16) and shut off from a low-pressure return (56). In order to switch the actuator (24) from the second position back into the first position, the working chamber (30) is connected to the low-pressure return (56) and shut off from the high-pressure hydraulic accumulator (16). The pressure in the high-pressure hydraulic accumulator (16) is kept constant or reduced in a simple manner by virtue of the working chamber (30) being connected to the high-pressure hydraulic accumulator (16) and the low-pressure return (56) at the same time.
    Type: Application
    Filed: October 10, 2003
    Publication date: April 15, 2004
    Inventors: Hans Schlembach, Hermann Gaessler, Udo Diehl, Karsten Mischker, Rainer Walter, Ulf Pischke, Andreas Baumann, Hubert Schweiggart, Gerhard Filp, Bernd Rosenau, Juergen Ulm, Thomas Mocken, Sevan Tatiyosyan, Juergen Schieman, Christian Grosse, Volker Beuche, Stefan Reimer, Simon Kieser