Patents by Inventor Yuu NAGASATO

Yuu NAGASATO 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).

  • Hydraulic control system for a belt-driven continuously variable transmission
    Patent number: 10139000
    Abstract: A hydraulic control system stably controls pressure in a hydraulic chamber of a pulley accommodating a belt by controlling a feeding valve and a discharging valve. The control system reduces a control amount of the feeding valve to be smaller than that calculated based on a pressure difference in a case other than one in which pressure in the hydraulic chamber is increased by delivering oil to another chamber, in case the pressure in the hydraulic chamber is increased by delivering the oil to the other chamber. The control system reduces a control amount of the discharging valve to be smaller than that calculated based on the pressure difference in a case other than one in which pressure in the hydraulic chamber is lowered by discharging the oil from the other chamber, in case the pressure in the hydraulic chamber is lowered by discharging the oil to the other chamber.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: November 27, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuji Hattori, Kenta Kimura, Takafumi Inagaki, Yuu Nagasato
  • HYDRAULIC CONTROL SYSTEM FOR A BELT-DRIVEN CONTINUOUSLY VARIABLE TRANSMISSION
    Publication number: 20160061320
    Abstract: A hydraulic control system stably controls pressure in a hydraulic chamber of a pulley accommodating a belt by controlling a feeding valve and a discharging valve. The control system reduces a control amount of the feeding valve to be smaller than that calculated based on a pressure difference in a case other than one in which pressure in the hydraulic chamber is increased by delivering oil to another chamber, in case the pressure in the hydraulic chamber is increased by delivering the oil to the other chamber. The control system reduces a control amount of the discharging valve to be smaller than that calculated based on the pressure difference in a case other than one in which pressure in the hydraulic chamber is lowered by discharging the oil from the other chamber, in case the pressure in the hydraulic chamber is lowered by discharging the oil to the other chamber.
    Type: Application
    Filed: April 9, 2013
    Publication date: March 3, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuji HATTORI, Kenta KIMURA, Takafumi INAGAKI, Yuu NAGASATO