Patents by Inventor Kurt Jean-Marie DUBOIS

Kurt Jean-Marie DUBOIS 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: 11898568
    Abstract: A variable geometry turbine (VGT) comprising an intake channel, a rotor, an adjustable nozzle, a nozzle actuator, and a controller. The controller comprises a calibration routine, arranged for calibrating the VGT during normal operation thereof. In the calibration routine, the controller is arranged for performing the steps of: adjusting the adjustable nozzle from an initial position towards a closed position, while monitoring a pre-turbine pressure; detecting a deflection point position of the adjustable nozzle at which a sharp difference in the pre-turbine pressure occurs; and adjusting a minimum cross sectional area in the closed position, to adjust a working range of the VGT in dependence of varying operating conditions, wherein the working range excludes the detected deflection point position.
    Type: Grant
    Filed: March 13, 2023
    Date of Patent: February 13, 2024
    Assignee: DAF Trucks N.V.
    Inventors: Joep Wolken, Bartholomeus Van Grimbergen, Kurt Jean-Marie Dubois
  • Publication number: 20230313808
    Abstract: A variable geometry turbine (VGT) comprising an intake channel, a rotor, an adjustable nozzle, a nozzle actuator, and a controller. The controller comprises a calibration routine, arranged for calibrating the VGT during normal operation thereof. In the calibration routine, the controller is arranged for performing the steps of: adjusting the adjustable nozzle from an initial position towards a closed position, while monitoring a pre-turbine pressure; detecting a deflection point position of the adjustable nozzle at which a sharp difference in the pre-turbine pressure occurs; and adjusting a minimum cross sectional area in the closed position, to adjust a working range of the VGT in dependence of varying operating conditions, wherein the working range excludes the detected deflection point position.
    Type: Application
    Filed: March 13, 2023
    Publication date: October 5, 2023
    Inventors: Joep WOLKEN, Bartholomeus VAN GRIMBERGEN, Kurt Jean-Marie DUBOIS