Patents by Inventor Lorenz Fehrenbach

Lorenz Fehrenbach 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 control unit for operating a drive train of a hybrid vehicle
    Patent number: 9316149
    Abstract: A method of operating a drive-train of a hybrid vehicle which comprises at least a hybrid drive with an internal combustion engine and an electric machine, an automatic or automated change-speed transmission connected between the hybrid drive and a drive output, and a clutch connected between the internal combustion engine and the electric machine. When starting the internal combustion engine from a purely electric driving mode, the clutch is initially disengaged. To start the internal combustion engine, the clutch is at least partially engaged and the internal combustion engine is drag-started by the electric machine, and, in parallel with starting the internal combustion engine, a downshift in the transmission is initiated once a rotational speed of the internal combustion engine reaches or exceeds an applicable threshold value.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: April 19, 2016
    Assignee: ZF Friedrichshafen AG
    Inventors: Tobias Zollner, Bernd Allgaier, Clemens Kuhn, Patrick Peter, Lorenz Fehrenbach, Holger Bacher
  • METHOD AND CONTROL UNIT FOR OPERATING A DRIVE TRAIN OF A HYBRID VEHICLE
    Publication number: 20130284125
    Abstract: A method of operating a drive-train of a hybrid vehicle which comprises at least a hybrid drive with an internal combustion engine and an electric machine, an automatic or automated change-speed transmission connected between the hybrid drive and a drive output, and a clutch connected between the internal combustion engine and the electric machine. When starting the internal combustion engine from a purely electric driving mode, the clutch is initially disengaged. To start the internal combustion engine, the clutch is at least partially engaged and the internal combustion engine is drag-started by the electric machine, and, in parallel with starting the internal combustion engine, a downshift in the transmission is initiated once a rotational speed of the internal combustion engine reaches or exceeds an applicable threshold value.
    Type: Application
    Filed: December 6, 2011
    Publication date: October 31, 2013
    Applicant: ZF Friedrichshafen AG
    Inventors: Tobias Zollner, Bernd Allgaier, Clemens Kuhn, Patrick Peter, Lorenz Fehrenbach, Holger Bacher