Patents by Inventor Hideki Tomida

Hideki Tomida 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 apparatus for automatic transmission, and control method for automatic transmission
    Patent number: 8226532
    Abstract: A control apparatus for an automatic transmission having a rotation transmission mechanism for transmitting rotation of a prime mover mounted on a vehicle to a speed change mechanism, and an input clutch for controlling connection/disconnection of the transmitted rotation. The control apparatus includes a control portion that performs a neutral control including a release control that reduces rotation transmission efficiency, and an in-neutral control so as to maintain rotation efficiency. During the in-neutral control, a check control is performed that makes the fluid pressure relative to the input clutch fluctuate, and when determining as a result of the check control that the rotation transmission efficiency is in a predetermined low efficiency state, then reducing the fluid pressure relative to the input clutch by a set pressure, and thereafter maintaining the fluid pressure constant.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: July 24, 2012
    Assignee: Aisin AW Co., Ltd.
    Inventors: Gen Okumoto, Yasuo Tsukamoto, Hideki Tomida, Masahiko Nishikawa
  • CONTROL APPARATUS FOR AUTOMATIC TRANSMISSION, AND CONTROL METHOD FOR AUTOMATIC TRANSMISSION
    Publication number: 20100056333
    Abstract: A control apparatus for an automatic transmission having a rotation transmission mechanism for transmitting rotation of a prime mover mounted on a vehicle to a speed change mechanism, and an input clutch for controlling connection/disconnection of the transmitted rotation. The control apparatus includes a control portion that performs a neutral control including a release control that reduces rotation transmission efficiency, and an in-neutral control so as to maintain rotation efficiency. During the in-neutral control, a check control is performed that makes the fluid pressure relative to the input clutch fluctuate, and when determining as a result of the check control that the rotation transmission efficiency is in a predetermined low efficiency state, then reducing the fluid pressure relative to the input clutch by a set pressure, and thereafter maintaining the fluid pressure constant.
    Type: Application
    Filed: August 28, 2009
    Publication date: March 4, 2010
    Applicant: AISIN AW CO., LTD.
    Inventors: Gen Okumoto, Yasuo Tsukamoto, Hideki Tomida, Masahiko Nishikawa