Patents by Inventor Roger Graaf

Roger Graaf 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: 9776527
    Abstract: A method for controlling a vehicle driveline includes connecting an electric motor to each of respective vehicle wheels, determining from driver input a magnitude of demanded wheel torque, determining speed of each wheel, using demanded wheel torque and the respective wheel speed to determine from a power loss map a current power loss for each motor, and transmitting power from the motor having the lowest current power loss to the respective vehicle wheel.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: October 3, 2017
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Arnulf Sponheimer, Monika Derflinger, Roger Graaf, Marc Simon
  • Publication number: 20140343770
    Abstract: A method for controlling a vehicle driveline includes connecting an electric motor to each of respective vehicle wheels, determining from driver input a magnitude of demanded wheel torque, determining speed of each wheel, using demanded wheel torque and the respective wheel speed to determine from a power loss map a current power loss for each motor, and transmitting power from the motor having the lowest current power loss to the respective vehicle wheel.
    Type: Application
    Filed: May 14, 2013
    Publication date: November 20, 2014
    Inventors: Arnulf Sponheimer, Monika Derflinger, Roger Graaf, Marc Simon
  • Patent number: 8892288
    Abstract: A method for controlling an electric vehicle drivetrain having least two drive units with wheels located on opposite axles are driven by respective drive units, includes in a first operating mode, the ratio of the torques provided by the drive units in each case for a given torque requirement is set taking into account the efficiency applicable to each drive unit under the given operating conditions, and in a second operating mode, the ratio of the torques provided by the drive units in each case for a given torque requirement is set independently of the efficiency applicable to each drive unit under the given operating conditions.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: November 18, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Monika Derflinger, Arnulf Sponheimer, Roger Graaf, Marc Simon
  • Publication number: 20140195079
    Abstract: A method for controlling an electric vehicle drivetrain having least two drive units with wheels located on opposite axles are driven by respective drive units, includes in a first operating mode, the ratio of the torques provided by the drive units in each case for a given torque requirement is set taking into account the efficiency applicable to each drive unit under the given operating conditions, and in a second operating mode, the ratio of the torques provided by the drive units in each case for a given torque requirement is set independently of the efficiency applicable to each drive unit under the given operating conditions.
    Type: Application
    Filed: January 8, 2013
    Publication date: July 10, 2014
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Monika Derflinger, Arnulf Sponheimer, Roger Graaf, Marc Simon
  • Patent number: 6390486
    Abstract: In order to limit rolling movements of the vehicle, spring arms are formed on those ends of the leaf spring, arranged transversely to the vehicle, on which the wheel carriers are articulated, said spring arms being connected in a force-transmitting manner to the transverse leaf spring. The spring arms point toward the longitudinal mid-plane of the vehicle and run at an acute angle to the transverse leaf spring. Since the spring designed in this way is a universally available structural part (the spring arms running at an angle may also be produced separately and then be connected non-positively to the transverse leaf spring), the two wheels are connected to one another directly and the triangular shape formed by the spring arms running at an angle gives rise to a function similar to that of a transverse link.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: May 21, 2002
    Assignee: Ford Global Technologies, Inc.
    Inventors: Joachim Boes, Michael Schmidt, Wolfram Seibert, Pim van der Jagt, Roger Graaf