Patents by Inventor Shingo Oobayashi

Shingo Oobayashi 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).

  • Torque distribution control system for a four-wheel drive motor vehicle
    Patent number: 5099944
    Abstract: A planetary gear device as a central differential distributes an output torque of a transmission to the front wheels and the rear wheels of a four-wheel drive motor vehicle. A fluid operated clutch is provided between a sun gear and a ring gear of the planetary gear device. A desired speed ratio between front-wheel speed and rear-wheel speed at cornering is calculated based on vehicle speed and steering angle of the vehicle. A torque distribution ratio is determined in accordance with a difference between the desired speed ratio and an actual speed ratio between the front-wheel speed and the rear-wheel speed. The clutch pressure is controlled in response to the torque distribution ratio for engaging the clutch so that the average speed ratio coverages to the desired speed ratio.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: March 31, 1992
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Hayashi Kageyama, Shingo Oobayashi, Makoto Shibuya, Kazunari Tezuka