Patents by Inventor Satoh Kouichi

Satoh Kouichi 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 apparatus
    Patent number: 9278708
    Abstract: An electric power steering apparatus for generating a PWM signal based on a calculated steering assist command value, PWM-controlling a motor via a motor drive circuit including switching elements, and assist-controlling a steering system that a motor relay is inserted between the motor drive circuit and the motor, includes a steering status detecting section that detects a steering status of a steering wheel, outputs a longtime steering holding signal when detecting that the steering status is a longtime steering holding status, and outputs a normal steering signal when detecting that the steering status is a normal steering status, and a motor current control section that determines a motor current control value for controlling a motor current flowing in the motor relay in accordance with the longtime steering holding signal or the normal steering signal.
    Type: Grant
    Filed: September 3, 2012
    Date of Patent: March 8, 2016
    Assignee: NSK LTD.
    Inventors: Satoh Kouichi, Keiji Kashimoto, Haruhiko Kamiguchi
  • ELECTRIC POWER STEERING APPARATUS
    Publication number: 20160001813
    Abstract: An electric power steering apparatus for generating a PWM signal based on a calculated steering assist command value, PWM-controlling a motor via a motor drive circuit including switching elements, and assist-controlling a steering system that a motor relay is inserted between the motor drive circuit and the motor, comprises a steering status detecting section that detects a steering status of a steering wheel, outputs a longtime steering holding signal when detecting that the steering status is a longtime steering holding status, and outputs a normal steering signal when detecting that the steering status is a normal steering status, and a motor current control section that determines a motor current control value for controlling a motor current flowing in the motor relay in accordance with the longtime steering holding signal or the normal steering signal.
    Type: Application
    Filed: September 18, 2015
    Publication date: January 7, 2016
    Applicant: NSK LTD.
    Inventors: Satoh KOUICHI, Keiji KASHIMOTO, Haruhiko KAMIGUCHI
  • POWER STEERING APPARATUS
    Publication number: 20140195119
    Abstract: An electric power steering apparatus for generating a PWM signal based on a calculated steering assist command value, PWM-controlling a motor via a motor drive circuit including switching elements, and assist-controlling a steering system that a motor relay is inserted between the motor drive circuit and the motor, includes a steering status detecting section that detects a steering status of a steering wheel, outputs a longtime steering holding signal when detecting that the steering status is a longtime steering holding status, and outputs a normal steering signal when detecting that the steering status is a normal steering status, and a motor current control section that determines a motor current control value for controlling a motor current flowing in the motor relay in accordance with the longtime steering holding signal or the normal steering signal.
    Type: Application
    Filed: September 3, 2012
    Publication date: July 10, 2014
    Applicant: NSK LTD.
    Inventors: Satoh Kouichi, Keiji Kashimoto, Haruhiko Kamiguchi