Patents by Inventor Qiang R. Liu

Qiang R. Liu 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).

  • Publication number: 20180373256
    Abstract: An automatic turning control system for a work vehicle having a ground engaging traction device directed by a manual steering device. The automatic turning control system includes an electronic control unit (ECU), a traction device angle sensor configured to generate an angle signal representative of an angle of the traction device with respect to an axis of the work vehicle, and a vehicle guidance system. The ECU is configured to generate a manual path signal representing an actual path of the work vehicle based on the angle signal. The ECU is operatively connected to a vehicle guidance system and determines a learned path signal based on the manual path signal. The vehicle guidance system automatically directs the work vehicle along the learned path signal when the vehicle moves from a working area, to a non-working area, and back to the working area of a field.
    Type: Application
    Filed: June 27, 2017
    Publication date: December 27, 2018
    Inventors: Jeffrey E. Runde, Qiang R. Liu, Shufeng Han
  • Publication number: 20180373257
    Abstract: A method and apparatus for automatically controlling ground speed of a work vehicle. The apparatus includes a speed sensor generating a vehicle speed signal, the speed sensor operatively connected to a controller. A traction device angle sensor generates an angle signal which represents an angle of the traction device with respect to an axis of the work vehicle, wherein the traction device angle sensor operatively connected to the controller. A vehicle guidance system is configured to generate a vehicle position signal, wherein the controller determines the ground speed of the vehicle based on at least one of: i) a tracking error of the vehicle relative to the vehicle position signal; ii) a planned curved vehicle path; iii) a planned location of the vehicle within a defined portion of a field; and iv) a planned path segment and an associated change in direction of travel of the work vehicle.
    Type: Application
    Filed: June 27, 2017
    Publication date: December 27, 2018
    Inventors: Jeffrey E. Runde, Qiang R. Liu