Patents by Inventor Masatake Ichikawa

Masatake Ichikawa 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).

  • Shift control apparatus for automatic transmission
    Patent number: 6616560
    Abstract: A shift control apparatus that advances activation of an engagement element to be engaged during a shift requiring engagement and release of four engagement elements, thereby reducing the shift time. The automatic transmission achieves a sixth-to-fourth-to-third shift by controlling servo pressures for the four engagement elements. The control apparatus starts, during the time of the sixth-to-third shift, supply of the hydraulic pressure for activating the engagement element to be engaged at the time of the fourth-to-third shift, thereby advancing the establishment of the engagement stand-by state at the time of the fourth-to-third shift. Accordingly, the reduction in the servo pressure of the engagement element to be released at the time of the fourth-to-third shift can be advanced, thereby reducing the time for the sixth-to-third shift.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: September 9, 2003
    Assignee: Aisin AW Co., Ltd.
    Inventors: Masahiro Hayabuchi, Masaaki Nishida, Hiroshi Tsutsui, Kouichi Kojima, Yutaka Teraoka, Nobuhiro Iwai, Masatake Ichikawa
  • Shift control apparatus for automatic transmission
    Publication number: 20020086760
    Abstract: A shift control apparatus that advances activation of an engagement element to be engaged during a shift requiring engagement and release of four engagement elements, thereby reducing the shift time. The automatic transmission achieves a sixth-to-fourth-to-third shift by controlling servo pressures for the four engagement elements. The control apparatus starts, during the time of the sixth-to-third shift, supply of the hydraulic pressure for activating the engagement element to be engaged at the time of the fourth-to-third shift, thereby advancing the establishment of the engagement stand-by state at the time of the fourth-to-third shift. Accordingly, the reduction in the servo pressure of the engagement element to be released at the time of the fourth-to-third shift can be advanced, thereby reducing the time for the sixth-to-third shift.
    Type: Application
    Filed: December 17, 2001
    Publication date: July 4, 2002
    Applicant: AISIN AW CO., LTD.
    Inventors: Masahiro Hayabuchi, Masaaki Nishida, Hiroshi Tsutsui, Kouichi Kojima, Yutaka Teraoka, Nobuhiro Iwai, Masatake Ichikawa