Patents by Inventor Derek W. Johnson

Derek W. Johnson 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).

  • Declutch clunk mitigation through torque intervention
    Patent number: 10589746
    Abstract: A method for mitigating clunk in a driveline of a vehicle system during a declutch event includes determining a current torque request of a prime mover based on an accelerator pedal position of an accelerator pedal of the vehicle system. The method includes determining a clutch pedal position and determining, via a controller, a clutch pedal speed based on a change of the clutch pedal position over time. The method further includes modifying, via the controller, the current torque request to obtain a modified torque request based on the clutch pedal position and the clutch pedal speed such that a stored potential energy in the driveline is minimized by a time that the clutch pedal of the vehicle system is disengaged during the declutch event.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: March 17, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Derek W. Johnson, David T. Hanner, Shaun D. Hoffman
  • DECLUTCH CLUNK MITIGATION THROUGH TORQUE INTERVENTION
    Publication number: 20200062263
    Abstract: A method for mitigating clunk in a driveline of a vehicle system during a declutch event includes determining a current torque request of a prime mover based on an accelerator pedal position of an accelerator pedal of the vehicle system. The method includes determining a clutch pedal position and determining, via a controller, a clutch pedal speed based on a change of the clutch pedal position over time. The method further includes modifying, via the controller, the current torque request to obtain a modified torque request based on the clutch pedal position and the clutch pedal speed such that a stored potential energy in the driveline is minimized by a time that the clutch pedal of the vehicle system is disengaged during the declutch event.
    Type: Application
    Filed: August 27, 2018
    Publication date: February 27, 2020
    Applicant: GM Global Technology Operations LLC
    Inventors: Derek W. Johnson, David T. Hanner, Shaun D. Hoffman