Patents by Inventor Kazuharu ASAI

Kazuharu ASAI 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).

  • Control device
    Patent number: 10807597
    Abstract: A control device that includes an electronic control unit that is configured to perform lock-up engagement pressure control for acceleration upon acceleration of a vehicle where vehicle speed is increased by increasing a rotational speed of the internal combustion engine, the lock-up engagement pressure control for acceleration controlling engagement pressure of the lock-up clutch, wherein in the lock-up engagement pressure control for acceleration, when an actual rotational speed of the input has reached greater than or equal to a reference rotational speed, the electronic control unit is configured to start engagement pressure increase control, the reference rotational speed being lower than a target rotational speed of the internal combustion engine, and the engagement pressure increase control increasing the engagement pressure of the lock-up clutch.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: October 20, 2020
    Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Eiji Moriyama, Kiyoshi Kurita, Kazuharu Asai, Munenori Terada, Makoto Sawada, Shinya Toyoda
  • Hydraulic control device for automatic transmission
    Patent number: 10626985
    Abstract: A hydraulic control device that includes a second solenoid valve that is capable of supplying a resisting pressure that maintains the switching valve in the non-reverse state against the reverse range pressure, wherein the switching valve is maintained in the non-reverse state by supplying the resisting pressure from the second solenoid valve while a travel range is switched to at least a reverse range during forward travel.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: April 21, 2020
    Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuharu Asai, Makoto Sawada, Kyohei Suzumura, Mitsuhiro Fukao, Kenichi Tsuchida, Yoshimitsu Hyodo, Toshiaki Hayashi, Fumiaki Aikawa, Yuta Seriguchi, Syuji Moriyama, Yoshinobu Soga, Hiromitsu Nitani
  • CONTROL DEVICE
    Publication number: 20200055519
    Abstract: A control device that includes an electronic control unit that is configured to perform lock-up engagement pressure control for acceleration upon acceleration of a vehicle where vehicle speed is increased by increasing a rotational speed of the internal combustion engine, the lock-up engagement pressure control for acceleration controlling engagement pressure of the lock-up clutch, wherein in the lock-up engagement pressure control for acceleration, when an actual rotational speed of the input has reached greater than or equal to a reference rotational speed, the electronic control unit is configured to start engagement pressure increase control, the reference rotational speed being lower than a target rotational speed of the internal combustion engine, and the engagement pressure increase control increasing the engagement pressure of the lock-up clutch.
    Type: Application
    Filed: November 14, 2017
    Publication date: February 20, 2020
    Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Eiji MORIYAMA, Kiyoshi KURITA, Kazuharu ASAI, Munenori TERADA, Makoto SAWADA, Shinya TOYODA
  • HYDRAULIC CONTROL DEVICE FOR AUTOMATIC TRANSMISSION
    Publication number: 20180313444
    Abstract: A hydraulic control device that includes a second solenoid valve that is capable of supplying a resisting pressure that maintains the switching valve in the non-reverse state against the reverse range pressure, wherein the switching valve is maintained in the non-reverse state by supplying the resisting pressure from the second solenoid valve while a travel range is switched to at least a reverse range during forward travel.
    Type: Application
    Filed: November 21, 2016
    Publication date: November 1, 2018
    Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuharu ASAI, Makoto SAWADA, Kyohei SUZUMURA, Mitsuhiro FUKAO, Kenichi TSUCHIDA, Yoshimitsu HYODO, Toshiaki HAYASHI, Fumiaki AIKAWA, Yuta SERIGUCHI, Syuji MORIYAMA, Yoshinobu SOGA, Hiromitsu NITANI