Patents by Inventor Tatsutoshi Miyabe

Tatsutoshi Miyabe 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 system of an automatic transmission
    Patent number: 5267491
    Abstract: The control system for an automatic transmission shifts the main transmission simultaneously with the auxiliary transmission at the time of a particular shift. At this time, a target gear ratio progress value of the auxiliary transmission is set for a gear ratio progress value indicative of a shift progress state of the main transmission. The main transmission is arranged so as to finish the shift control within a given target period of time, and the auxiliary transmission is arranged to implement the shift control by the feedback control so as to follow the target gear ratio progress value. The shift control of the auxiliary transmission is corrected by the learning control on the basis of a deviation between the target gear ratio progress value and the actual gear ratio progress value.
    Type: Grant
    Filed: December 28, 1992
    Date of Patent: December 7, 1993
    Assignee: Mazda Motor Corporation
    Inventors: Takayuki Sumimoto, Minoru Kuriyama, Kazunori Enokido, Hidehiko Mishima, Tatsutoshi Miyabe, Toshihisa Marusue