Patents by Inventor Kouichi YAMASHINA

Kouichi YAMASHINA 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: 10112643
    Abstract: An electric power steering device includes a phase advance correction unit configured to advance a phase of a steering torque signal detected by a torque sensor detecting a steering torque input from a steering wheel, a specific frequency extraction unit configured to extract a component in a specific frequency band out of the steering torque signal detected by the torque sensor, a gain multiplication unit configured to correct a steering torque signal computed on the basis of an output signal of the phase advance correction unit and an output signal of the specific frequency extraction unit such that the steering torque signal reaches a limit value set by a limiter by multiplying the steering torque signal by a gain, and an addition unit configured to add an assist correction command value calculated on the basis of an output signal output from the gain multiplication unit to the assist command value.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: October 30, 2018
    Assignee: KYB Corporation
    Inventors: Hiroyuki Gotou, Noboru Yoshida, Kenji Nishikubo, Yuichiro Okamoto, Kouichi Yamashina
  • Publication number: 20170166247
    Abstract: An electric power steering device includes a phase advance correction unit configured to advance a phase of a steering torque signal detected by a torque sensor detecting a steering torque input from a steering wheel, a specific frequency extraction unit configured to extract a component in a specific frequency band out of the steering torque signal detected by the torque sensor, a gain multiplication unit configured to correct a steering torque signal computed on the basis of an output signal of the phase advance correction unit and an output signal of the specific frequency extraction unit such that the steering torque signal reaches a limit value set by a limiter by multiplying the steering torque signal by a gain, and an addition unit configured to add an assist correction command value calculated on the basis of an output signal output from the gain multiplication unit to the assist command value.
    Type: Application
    Filed: February 4, 2015
    Publication date: June 15, 2017
    Inventors: Hiroyuki GOTOU, Noboru YOSHIDA, Kenji NISHIKUBO, Yuichiro OKAMOTO, Kouichi YAMASHINA