Patents by Inventor Tomoyuki Yamauchi

Tomoyuki Yamauchi 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).

  • Electric power steering device and method for controlling the same
    Patent number: 7009358
    Abstract: The present invention provides an electric power steering device enabled to compensate for the influence of the inertia of a steering-assisting-force generating motor on steering with accurate timing even when a steering direction is reversed at high speed. Based on steering torque and a rotation angular speed of a steering-assisting-force generating motor, a steering angular acceleration correspondence value is obtained. The device has means for regulating a gain, which is multiplied to a change acceleration of the steering torque. The motor is controlled so that the steering assisting force is corrected according to a motor output correction value obtained on the basis of the relation between the motor output correction value and the steering angular acceleration correspondence value, which is preliminarily determined and stored in such a way as to compensate for the influence of the inertia on steering, and the obtained steering angular acceleration correspondence value.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: March 7, 2006
    Assignee: Koyo Seiko Co., Ltd.
    Inventors: Terutaka Tamaizumi, Yoshinobu Shimizu, Shinya Aono, Akihiro Nishiyama, Takanobu Takamatsu, Masayuki Kita, Tomoyuki Yamauchi
  • Electric power steering device and method for controlling the same
    Publication number: 20040140788
    Abstract: The present invention provides an electric power steering device enabled to compensate for the influence of the inertia of a steering-assisting-force generating motor on steering with accurate timing even when a steering direction is reversed at high speed. Based on steering torque and a rotation angular speed of a steering-assisting-force generating motor, a steering angular acceleration correspondence value is obtained. The device has means for regulating a gain, which is multiplied to a change acceleration of the steering torque. The motor is controlled so that the steering assisting force is corrected according to a motor output correction value obtained on the basis of the relation between the motor output correction value and the steering angular acceleration correspondence value, which is preliminarily determined and stored in such a way as to compensate for the influence of the inertia on steering, and the obtained steering angular acceleration correspondence value.
    Type: Application
    Filed: October 30, 2003
    Publication date: July 22, 2004
    Applicant: Koyo Seiko Co., Ltd.
    Inventors: Terutaka Tamaizumi, Yoshinobu Shimizu, Shinya Aono, Akihiro Nishiyama, Takanobu Takamatsu, Masayuki Kita, Tomoyuki Yamauchi