Patents by Inventor Stefan-Ulrich Prange

Stefan-Ulrich Prange 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 and device for controlling an auxiliary pump for a transmission
    Patent number: 9556864
    Abstract: A method of controlling an auxiliary pump for supplying the hydraulic fluid of a hybrid transmission of a vehicle. The auxiliary pump, after the expiration of a predetermined time interval of deactivation, is activated to prevent accumulation of air in the intake area of the auxiliary pump. In addition, a device for the execution of the method, in which a control device is provided which has its signals connected with the electric auxiliary pump for the purpose of controlling the auxiliary pump in order to prevent accumulation of air in the intake area of the auxiliary pump.
    Type: Grant
    Filed: April 2, 2013
    Date of Patent: January 31, 2017
    Assignee: ZF Friedrichshafen AG
    Inventors: Tobias Zollner, Christoph Ommer, Stefan-Ulrich Prange
  • METHOD AND DEVICE FOR CONTROLLING AN AUXILIARY PUMP FOR A TRANSMISSION
    Publication number: 20130272900
    Abstract: A method of controlling an auxiliary pump for supplying the hydraulic fluid of a hybrid transmission of a vehicle. The auxiliary pump, after the expiration of a predetermined time interval of deactivation, is activated to prevent accumulation of air in the intake area of the auxiliary pump. In addition, a device for the execution of the method, in which a control device is provided which has its signals connected with the electric auxiliary pump for the purpose of controlling the auxiliary pump in order to prevent accumulation of air in the intake area of the auxiliary pump.
    Type: Application
    Filed: April 2, 2013
    Publication date: October 17, 2013
    Applicant: ZF Friedrichshafen AG
    Inventors: Tobias ZOLLNER, Christoph OMMER, Stefan-Ulrich PRANGE
  • Variator
    Patent number: 6652403
    Abstract: Within the scope of the method for compensating angular misalignments for the variator of a continuously variable belt-drive transmission having cone pulleys disposed in pairs and one pushing linked band as torque transmitting belt-drive element, the fixed cone pulley of a variator side is designed with a curved outline, a pushing link displacement path being calculated with reference to a crowned pushing link flank outline and then the pushing link displacement path to the other side of the variator is calculated so that the displacement path is free of angular misalignment.
    Type: Grant
    Filed: December 13, 2001
    Date of Patent: November 25, 2003
    Assignee: ZF Batavia, L.L.C.
    Inventors: Silvius Drees, Jochen Fischer, Stefan-Ulrich Prange
  • Variator
    Publication number: 20020077211
    Abstract: Within the scope of the method for compensating angular misalignments for the variator of a continuously variable belt-drive transmission having cone pulleys disposed in pairs and one pushing linked band as torque transmitting belt-drive element, the fixed cone pulley of a variator side is designed with a curved outline, a pushing link displacement path being calculated with reference to a crowned pushing link flank outline and then the pushing link displacement path to the other side of the variator is calculated so that the displacement path is free of angular misalignment.
    Type: Application
    Filed: December 13, 2001
    Publication date: June 20, 2002
    Inventors: Silvius Drees, Jochen Fischer, Stefan-Ulrich Prange