Patents by Inventor Shun Minaki

Shun Minaki 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).

  • Patent number: 11041535
    Abstract: A control apparatus for a synchronous meshing mechanism that is equipped with a gear, a sleeve, a synchronizer ring, and a hydraulic actuator is provided. When it is determined that the sleeve and the gear have been rotationally synchronized with each other in an engagement transition period of the synchronous meshing mechanism, an electronic control unit with which the control apparatus is equipped sets a command pressure for the hydraulic actuator to an intermediate pressure that is lower than a meshing completion pressure. Besides, when meshing has not been completed even after the lapse of a predetermined time from a timing when the command pressure for the hydraulic actuator is set to the intermediate pressure, the electronic control unit sets the command pressure for the hydraulic actuator to the meshing completion pressure.
    Type: Grant
    Filed: May 22, 2020
    Date of Patent: June 22, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ken Jozaki, Takashi Seo, Toshio Suzuki, Hiroki Takeda, Yoshisuke Kametani, Shun Minaki
  • Publication number: 20200408264
    Abstract: A control apparatus for a synchronous meshing mechanism that is equipped with a gear, a sleeve, a synchronizer ring, and a hydraulic actuator is provided. When it is determined that the sleeve and the gear have been rotationally synchronized with each other in an engagement transition period of the synchronous meshing mechanism, an electronic control unit with which the control apparatus is equipped sets a command pressure for the hydraulic actuator to an intermediate pressure that is lower than a meshing completion pressure. Besides, when meshing has not been completed even after the lapse of a predetermined time from a timing when the command pressure for the hydraulic actuator is set to the intermediate pressure, the electronic control unit sets the command pressure for the hydraulic actuator to the meshing completion pressure.
    Type: Application
    Filed: May 22, 2020
    Publication date: December 31, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ken JOZAKI, Takashi SEO, Toshio SUZUKI, Hiroki TAKEDA, Yoshisuke KAMETANI, Shun MINAKI
  • Patent number: 9341263
    Abstract: Vehicle control device of vehicle including lockup clutch configured to directly couple between input/output rotating members of fluid power transmission device transmitting power of engine to automatic transmission, vehicle control device engaging lockup clutch when running state of vehicle in predetermined running state, vehicle control device providing lockup clutch pressure learning control of learning oil pressure of lockup clutch used in start-time lockup slip control in which lockup clutch placed in slip-engaged state toward engaged state at start of vehicle based on rotation speed of engine at time of engagement of lockup clutch, vehicle control device inhibiting engagement of lockup clutch when running state of vehicle in predetermined running state and also in second predetermined running state, vehicle control device engaging lockup clutch after running state of vehicle goes out of second predetermined running state, and providing lockup clutch pressure learning control in engaging process of locku
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: May 17, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Wataru Matsubara, Hiroya Fujiwara, Akira Hino, Shun Minaki, Naoto Tanaka
  • Publication number: 20150369361
    Abstract: Vehicle control device of vehicle including lockup clutch configured to directly couple between input/output rotating members of fluid power transmission device transmitting power of engine to automatic transmission, vehicle control device engaging lockup clutch when running state of vehicle in predetermined running state, vehicle control device providing lockup clutch pressure learning control of learning oil pressure of lockup clutch used in start-time lockup slip control in which lockup clutch placed in slip-engaged state toward engaged state at start of vehicle based on rotation speed of engine at time of engagement of lockup clutch, vehicle control device inhibiting engagement of lockup clutch when running state of vehicle in predetermined running state and also in second predetermined running state, vehicle control device engaging lockup clutch after running state of vehicle goes out of second predetermined running state, and providing lockup clutch pressure learning control in engaging process of locku
    Type: Application
    Filed: June 19, 2015
    Publication date: December 24, 2015
    Inventors: Wataru MATSUBARA, Hiroya FUJIWARA, Akira HINO, Shun MINAKI, Naoto TANAKA
  • Patent number: 8046143
    Abstract: An ECU executes a program including: a step of detecting a turbine revolution speed, a step of detecting an engine torque TE, a step of detecting a speed change ratio, a step of setting a range an enlarged slip region when a slip region enlargement condition is satisfied, and a step of enlarging the slip region toward a lock-up region side (high-load side).
    Type: Grant
    Filed: April 17, 2006
    Date of Patent: October 25, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuaki Nakamura, Hiromichi Kimura, Shun Minaki, Koji Oshima, Tomohiro Asami, Takahiro Kondo
  • Patent number: 7769516
    Abstract: An ECU executes a program including determining whether a mode is a neutral control execution mode, determining whether the mode is a neutral control return mode, detecting a proceeding state of the neutral control return mode when an accelerator is activated during the neutral control return mode, and inhibiting slip start when the mode is in an initial stage of the neutral control return mode.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: August 3, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takahiro Kondo, Makoto Nakayashiki, Tomohiro Asami, Shun Minaki
  • Patent number: 7670262
    Abstract: “Threshold A is substituted in a power-on state, “threshold B”, which is lower than “threshold A”, is substituted in a power-off state, and “threshold C”, which is lower than “threshold B” is substituted during a brake operation, as a rapid deceleration determination threshold. The rotational speed of an output shaft of an automatic transmission and the rapid deceleration determination threshold are compared to determine whether a vehicle is rapidly decelerating. The engagement state of a lock-up clutch is controlled based on whether the vehicle is rapidly decelerating.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: March 2, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shun Minaki, Koji Oshima
  • Publication number: 20090055063
    Abstract: An ECU executes a program including: a step (S100) of detecting a turbine revolution speed, a step (S200) of detecting an engine torque TE, a step (S300) of detecting a speed change ratio, a step (S500) of setting a range an enlarged slip region when a slip region enlargement condition is satisfied (YES in S400), and a step (S600) of enlarging the slip region toward a lock-up region side (high-load side).
    Type: Application
    Filed: April 17, 2006
    Publication date: February 26, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuaki Nakamura, Hiromichi Kimura, Shun Minaki, Koji Oshima, Tomohiro Asami, Takahiro Kondo
  • Publication number: 20080269013
    Abstract: “Threshold A is substituted in a power-on state, “threshold B”, which is lower than “threshold A”, is substituted in a power-off state, and “threshold C”, which is lower than “threshold B” is substituted during a brake operation, as a rapid deceleration determination threshold. The rotational speed of an output shaft of an automatic transmission and the rapid deceleration determination threshold are compared to determine whether a vehicle is rapidly decelerating. The engagement state of a lock-up clutch is controlled based on whether the vehicle is rapidly decelerating.
    Type: Application
    Filed: April 25, 2008
    Publication date: October 30, 2008
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shun MINAKI, Koji Oshima
  • Publication number: 20080172161
    Abstract: An ECU executes a program including determining whether a mode is a neutral control execution mode, determining whether the mode is a neutral control return mode, detecting a proceeding state of the neutral control return mode when an accelerator is activated during the neutral control return mode, and inhibiting slip start when the mode is in an initial stage of the neutral control return mode.
    Type: Application
    Filed: March 9, 2006
    Publication date: July 17, 2008
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahiro Kondo, Makoto Nakayashiki, Tomohiro Asami, Shun Minaki
  • Publication number: 20060237275
    Abstract: The vehicle start determining unit determines a vehicle starting state based on a vehicle speed and an accelerator pedal press-down degree. When the vehicle starting state is determined, the target slip value determining unit determines a target slip rotational speed based on the actual accelerator pedal press-down degree. In receipt of a signal indicating initiation of the control upon the previous slip control, the running history storing unit stores a change of the vehicle speed over time after the relevant timing, and sets a running history flag to an on state when detecting that the vehicle speed has exceeded a prescribed threshold value. In receipt of the target slip rotational speed and the running history flag, if the running history flag is in the on state, the lock-up clutch control unit carries out the slip control according to the target slip rotational speed.
    Type: Application
    Filed: April 17, 2006
    Publication date: October 26, 2006
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hirofumi Fujita, Hiromichi Kimura, Koji Oshima, Tomohiro Asami, Takahiro Kondo, Shun Minaki