Patents by Inventor Hiroki Kumashiro

Hiroki Kumashiro 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 of continuously variable transmission and control method of continuously variable transmission
    Patent number: 10731757
    Abstract: The controller performs shift control of the transmission such that an actual pressure of a primary pressure becomes an indicating pressure. The controller includes a phase advance compensator which performs advance compensation of the indicating pressure, and a setting unit which sets an indicating pressure on which the advance compensation is performed by the phase advance compensator as the indicating pressure, in accordance with at least one of a rotation speed of a primary pulley, an input torque to a secondary pulley, a speed ratio, or a changing rate.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: August 4, 2020
    Assignee: JATCO LTD
    Inventors: Takurou Kawasumi, Ken Okahara, Midori Yamaguchi, Masahiro Yamamoto, Hiroki Iwasa, Hiroki Kumashiro, Masayuki Shimizu, Ryuuichi Furukawa, Kenichi Mori, Kazutaka Adachi, Yutaka Kaneko, Hiroyuki Ashizawa
  • CONTROL DEVICE OF CONTINUOUSLY VARIABLE TRANSMISSION AND CONTROL METHOD OF CONTINUOUSLY VARIABLE TRANSMISSION
    Publication number: 20190078685
    Abstract: The controller performs shift control of the transmission such that an actual pressure of a primary pressure becomes an indicating pressure. The controller includes a phase advance compensator which performs advance compensation of the indicating pressure, and a setting unit which sets an indicating pressure on which the advance compensation is performed by the phase advance compensator as the indicating pressure, in accordance with at least one of a rotation speed of a primary pulley, an input torque to a secondary pulley, a speed ratio, or a changing rate.
    Type: Application
    Filed: February 27, 2017
    Publication date: March 14, 2019
    Applicant: JATCO Ltd
    Inventors: Takurou KAWASUMI, Ken OKAHARA, Midori YAMAGUCHI, Masahiro YAMAMOTO, Hiroki IWASA, Hiroki KUMASHIRO, Masayuki SHIMIZU, Ryuuichi FURUKAWA, Kenichi MORI, Kazutaka ADACHI, Yutaka KANEKO, Hiroyuki ASHIZAWA
  • Automatic transmission control system
    Patent number: 7713167
    Abstract: An automatic transmissions control system varies times to start a shift to securing a good response in engagement pressure for an engagement-side frictional element as well as suppressing occurrence of hydraulic pressure vibrations at low temperatures.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: May 11, 2010
    Assignee: Jatco Ltd
    Inventors: Hideharu Yamamoto, Kenichi Kaizu, Hiroshi Sekiguchi, Yukiyoshi Inuta, Hiroki Kumashiro
  • AUTOMATIC TRANSMISSION CONTROL SYSTEM
    Publication number: 20070232445
    Abstract: An automatic transmissions control system varies times to start a shift to securing a good response in engagement pressure for an engagement-side frictional element as well as suppressing occurrence of hydraulic pressure vibrations at low temperatures.
    Type: Application
    Filed: March 15, 2007
    Publication date: October 4, 2007
    Applicant: JATCO Ltd.
    Inventors: Hideharu YAMAMOTO, Kenichi KAIZU, Hiroshi SEKIGUCHI, Yukiyoshi INUTA, Hiroki KUMASHIRO