Patents by Inventor Kyohei SUZUMURA

Kyohei SUZUMURA 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: 10968962
    Abstract: A control apparatus for a vehicle drive-force transmitting apparatus including a dog clutch that is operated by an actuator to selectively connect and disconnect a drive-force transmitting path. In process of switching of the dog clutch from released state to engaged state, the control apparatus determines whether a rotational speed difference of the dog clutch is equal to or larger than a given difference value when a sleeve of the dog clutch is positioned on an engaging side of a synchronizing position for placing the dog clutch into the engaged state, and stops the switching of the dog clutch to the engaged state and causes the actuator to place the dog clutch back into the released state, when determining that the rotational speed difference is equal to or larger than the given difference value with the sleeve being positioned on the engaging side of the synchronizing position.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: April 6, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi Kamijo, Makoto Sawada, Kenji Matsuo, Kyohei Suzumura, Yoshisuke Kametani, Michio Yoshida, Hiroki Takeda, Takashi Seo
  • Patent number: 10914375
    Abstract: In a control device of a vehicle including a first power transmission path transmitting a power through a belt-type continuously variable transmission and a second power transmission path transmitting a power through a reduction gear mechanism in parallel between an input shaft and an output shaft and including a dog clutch in series with the reduction gear mechanism in the second power transmission path, when the dog clutch is in an engagement transition state and a rotational speed change of the output shaft is equal to or greater than a predetermined value, the engagement transition state of the dog clutch is canceled to release the dog clutch.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: February 9, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroki Takeda, Kyohei Suzumura, Yoshisuke Kametani, Kenji Matsuo, Satoshi Kamijo, Michio Yoshida, Toshio Suzuki, Makoto Sawada, Takashi Seo
  • Patent number: 10767761
    Abstract: A control apparatus for a vehicle driving apparatus includes: a first-operating-state determining portion configured to determine whether the driving apparatus is in a first operating state, by determining (i) whether a first drive-force transmitting path is established to cause a drive force to be transmitted through a gear mechanism and (ii) whether there is a probability of generation of noises between an input shaft and an continuously-variable transmission; and a belt-clamping-force controlling portion configured to control a belt clamping force of the continuously-variable transmission, when it is determined that the driving apparatus is in the first operating state, to start execution of a belt-clamping-force increasing control for increasing the belt clamping force such that the belt clamping force is made larger when the driving apparatus is in the first operating state than when the driving apparatus is in an operating state that is different from the first operating state.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: September 8, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke Tomomatsu, Tomohiro Kondo, Kyohei Suzumura, Jun Hakamagi
  • Patent number: 10738883
    Abstract: A controller of a power transmission system for a vehicle includes an electronic control unit. When a difference between a secondary pressure set by use of a command pressure of the electromagnetic control valve for the secondary pulley, and an actual pressure obtained by a hydraulic pressure sensor, is larger than a predetermined pressure difference, the electronic control sets a primary pressure and the secondary pressure such that a speed ratio of a continuously variable transmission becomes substantially equal to a maximum value. The electronic control unit determines that there is an abnormality that an output pressure of the electromagnetic control valve for a secondary pulley is low, when the speed ratio is smaller than a predetermined first determination value, and determines that there is an abnormality in the hydraulic pressure sensor, when the speed ratio is larger than a predetermined second determination value.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: August 11, 2020
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO TEN LIMITED
    Inventors: Kyohei Suzumura, Shinya Toyoda, Masayuki Tsujita, Tetsuya Okumura
  • Patent number: 10626985
    Abstract: A hydraulic control device that includes a second solenoid valve that is capable of supplying a resisting pressure that maintains the switching valve in the non-reverse state against the reverse range pressure, wherein the switching valve is maintained in the non-reverse state by supplying the resisting pressure from the second solenoid valve while a travel range is switched to at least a reverse range during forward travel.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: April 21, 2020
    Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuharu Asai, Makoto Sawada, Kyohei Suzumura, Mitsuhiro Fukao, Kenichi Tsuchida, Yoshimitsu Hyodo, Toshiaki Hayashi, Fumiaki Aikawa, Yuta Seriguchi, Syuji Moriyama, Yoshinobu Soga, Hiromitsu Nitani
  • Publication number: 20200040991
    Abstract: A control apparatus for a vehicle driving apparatus includes: a first-operating-state determining portion configured to determine whether the driving apparatus is in a first operating state, by determining (i) whether a first drive-force transmitting path is established to cause a drive force to be transmitted through a gear mechanism and (ii) whether there is a probability of generation of noises between an input shaft and an continuously-variable transmission; and a belt-clamping-force controlling portion configured to control a belt clamping force of the continuously-variable transmission, when it is determined that the driving apparatus is in the first operating state, to start execution of a belt-clamping-force increasing control for increasing the belt clamping force such that the belt clamping force is made larger when the driving apparatus is in the first operating state than when the driving apparatus is in an operating state that is different from the first operating state.
    Type: Application
    Filed: July 23, 2019
    Publication date: February 6, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke TOMOMATSU, Tomohiro KONDO, Kyohei SUZUMURA, Jun HAKAMAGI
  • Patent number: 10451126
    Abstract: A control device of a vehicle power transmission device including a first power transmission path transmitting power by engaging a first clutch, a sub-clutch and a second power transmission path transmitting power by engaging a second clutch each disposed between an engine and drive wheels and parallel to each other, the device including a fail-safe valve for preventing simultaneous engagement of the first and second clutches, the fail-safe valve configured to be switched to a fail-safe spool position preventing simultaneous engagement of the first and second clutches by a hydraulic pressure of a hydraulic fluid supplied to the first clutch or an output pressure of a first electromagnetic valve controlling the hydraulic pressure and the hydraulic pressure of the hydraulic fluid supplied to the second clutch or an output pressure of a second electromagnetic valve controlling the hydraulic pressure, the second electromagnetic valve configured to increase the output pressure.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: October 22, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yusuke Ohgata, Hiroki Kondo, Makoto Sawada, Shinya Toyoda, Shuji Moriyama, Kyohei Suzumura, Hiroki Takeda
  • Publication number: 20190309805
    Abstract: A control apparatus for a vehicle drive-force transmitting apparatus including a dog clutch that is operated by an actuator to selectively connect and disconnect a drive-force transmitting path. In process of switching of the dog clutch from released state to engaged state, the control apparatus determines whether a rotational speed difference of the dog clutch is equal to or larger than a given difference value when a sleeve of the dog clutch is positioned on an engaging side of a synchronizing position for placing the dog clutch into the engaged state, and stops the switching of the dog clutch to the engaged state and causes the actuator to place the dog clutch back into the released state, when determining that the rotational speed difference is equal to or larger than the given difference value with the sleeve being positioned on the engaging side of the synchronizing position.
    Type: Application
    Filed: April 4, 2019
    Publication date: October 10, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi KAMIJO, Makoto SAWADA, Kenji MATSUO, Kyohei SUZUMURA, Yoshisuke KAMETANI, Michio YOSHIDA, Hiroki TAKEDA, Takashi SEO
  • Publication number: 20190293173
    Abstract: A controller of a power transmission system for a vehicle includes an electronic control unit. When a difference between a secondary pressure set by use of a command pressure of the electromagnetic control valve for the secondary pulley, and an actual pressure obtained by a hydraulic pressure sensor, is larger than a predetermined pressure difference, the electronic control sets a primary pressure and the secondary pressure such that a speed ratio of a continuously variable transmission becomes substantially equal to a maximum value. The electronic control unit determines that there is an abnormality that an output pressure of the electromagnetic control valve for a secondary pulley is low, when the speed ratio is smaller than a predetermined first determination value, and determines that there is an abnormality in the hydraulic pressure sensor, when the speed ratio is larger than a predetermined second determination value.
    Type: Application
    Filed: March 13, 2019
    Publication date: September 26, 2019
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO TEN Limited
    Inventors: Kyohei SUZUMURA, Shinya TOYODA, Masayuki TSUJITA, Tetsuya OKUMURA
  • Publication number: 20190271391
    Abstract: In a control device of a vehicle including a first power transmission path transmitting a power through a belt-type continuously variable transmission and a second power transmission path transmitting a power through a reduction gear mechanism in parallel between an input shaft and an output shaft and including a dog clutch in series with the reduction gear mechanism in the second power transmission path, when the dog clutch is in an engagement transition state and a rotational speed change of the output shaft is equal to or greater than a predetermined value, the engagement transition state of the dog clutch is canceled to release the dog clutch.
    Type: Application
    Filed: March 4, 2019
    Publication date: September 5, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroki TAKEDA, Kyohei SUZUMURA, Yoshisuke KAMETANI, Kenji MATSUO, Satoshi KAMIJO, Michio YOSHIDA, Toshio SUZUKI, Makoto SAWADA, Takashi SEO
  • Publication number: 20180335134
    Abstract: A vehicle power transmission device comprises: a continuously variable transmission configured to include a primary pulley, a secondary pulley, and a transmission belt wound between the primary pulley and the secondary pulley; a belt running clutch of hydraulic type for transmitting power to the continuously variable transmission; and a hydraulic control circuit controlling the continuously variable transmission and the belt running clutch, the hydraulic control circuit comprising a fail-safe valve switching a communication destination of an oil supply passage for supplying a hydraulic fluid to the belt running clutch to one of a first oil passage supplied with a control hydraulic pressure and a second oil passage supplied with a hydraulic pressure higher than the control hydraulic pressure, the fail-safe valve connecting the oil supply passage with the second oil passage when the fail-safe valve is switched to a failure position. The second oil passage is provided with an orifice.
    Type: Application
    Filed: May 18, 2018
    Publication date: November 22, 2018
    Applicants: Toyota Jidosha Kabushiki Kaisha, Aisin AW Co., Ltd.
    Inventors: Yusuke Ohgata, Shuji Moriyama, Daisuke Tomomatsu, Makoto Sawada, Kyohei Suzumura, Kenichi Tsuchida, Koji Makino, Toshiaki Hayashi, Yuta Seriguchi
  • Publication number: 20180328422
    Abstract: A control device of a vehicle power transmission device including a first power transmission path transmitting power by engaging a first clutch, a sub-clutch and a second power transmission path transmitting power by engaging a second clutch each disposed between an engine and drive wheels and parallel to each other, the device including a fail-safe valve for preventing simultaneous engagement of the first and second clutches, the fail-safe valve configured to be switched to a fail-safe spool position preventing simultaneous engagement of the first and second clutches by a hydraulic pressure of a hydraulic fluid supplied to the first clutch or an output pressure of a first electromagnetic valve controlling the hydraulic pressure and the hydraulic pressure of the hydraulic fluid supplied to the second clutch or an output pressure of a second electromagnetic valve controlling the hydraulic pressure, the second electromagnetic valve configured to increase the output pressure.
    Type: Application
    Filed: May 9, 2018
    Publication date: November 15, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yusuke OHGATA, Hiroki KONDO, Makoto SAWADA, Shinya TOYODA, Shuji MORIYAMA, Kyohei SUZUMURA, Hiroki TAKEDA
  • Publication number: 20180313444
    Abstract: A hydraulic control device that includes a second solenoid valve that is capable of supplying a resisting pressure that maintains the switching valve in the non-reverse state against the reverse range pressure, wherein the switching valve is maintained in the non-reverse state by supplying the resisting pressure from the second solenoid valve while a travel range is switched to at least a reverse range during forward travel.
    Type: Application
    Filed: November 21, 2016
    Publication date: November 1, 2018
    Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuharu ASAI, Makoto SAWADA, Kyohei SUZUMURA, Mitsuhiro FUKAO, Kenichi TSUCHIDA, Yoshimitsu HYODO, Toshiaki HAYASHI, Fumiaki AIKAWA, Yuta SERIGUCHI, Syuji MORIYAMA, Yoshinobu SOGA, Hiromitsu NITANI
  • Patent number: 9765886
    Abstract: A control system and a control method for a vehicle, the vehicle includes an engine, an input shaft, an output shaft, a continuously variable transmission section, a stepped transmission section and a clutch mechanism, and a control device. The continuously variable transmission section and the stepped transmission section are provided between the input shaft and the output shaft. The clutch mechanism is provided in a torque transmission path between the stepped transmission section and drive wheels. The control device is configured to disengage the clutch mechanism in a case where a vehicle speed is at least equal to a specified value and the engine is stopped.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: September 19, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi Taninaka, Hirofumi Nakada, Michio Yoshida, Hiroki Kondo, Kenji Matsuo, Kazuya Ishiizumi, Daisuke Inoue, Kyohei Suzumura
  • Patent number: 9656669
    Abstract: A control apparatus for a vehicle with a continuously variable transmission, having an acceleration requirement determining portion determining operator required acceleration, a first restricted accelerator operation amount setting portion setting an accelerating member restricted operation amount that increases with a running speed increase, when the determining portion has determined required vehicle acceleration, and a shift control portion controlling the transmission speed ratio on the restricted amount basis, the control apparatus having: a second restricted accelerator operation amount setting portion decreasing the restricted amount from a value immediately prior to an accelerating member rapid releasing action determination moment, at a rate lower than an accelerating member operation actual amount decrease rate after the rapid releasing action determination moment, and an upper limit stop processing portion to limit the restricted amount after a determination moment that the operator requires vehicl
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: May 23, 2017
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOYOTA MOTOR EUROPE NV/SA
    Inventors: Kyohei Suzumura, Kosuke Kuwada, Naoyuki Sakamoto, Shinya Toyoda, Hiroyuki Sawada, Sei Kojima, Lieven Van Houdt
  • Patent number: 9618114
    Abstract: A hydraulic control system for a vehicle having a continuously variable transmission in which a torque transmitting capacity thereof is changed hydraulically, and an engagement device which is connected to the continuously variable transmission in series and in which a torque transmitting capacity thereof is changed hydraulically. The hydraulic control system comprises a selecting means that selects a command pattern for setting an engagement pressure of the engagement device out of a plurality of patterns when an initial pressure is lower than a steady pressure for a normal running of the vehicle. The selecting means is configured to select the command pattern in such a manner that the torque transmitting capacity of the engagement device does not exceeds the torque transmitting capacity of the continuously variable transmission, based on at least any of conditions of the initial pressure that is lowered to be lower than the steady pressure, and a rotational speed of the continuously variable transmission.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: April 11, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kyohei Suzumura, Shinya Toyoda, Kazuya Ishiizumi, Akira Hino, Sei Kojima
  • Publication number: 20160312890
    Abstract: A control apparatus for a vehicle with a continuously variable transmission, having an acceleration requirement determining portion determining operator required acceleration, a first restricted accelerator operation amount setting portion setting an accelerating member restricted operation amount that increases with a running speed increase, when the determining portion has determined required vehicle acceleration, and a shift control portion controlling the transmission speed ratio on the restricted amount basis, the control apparatus having: a second restricted accelerator operation amount setting portion decreasing the restricted amount from a value immediately prior to an accelerating member rapid releasing action determination moment, at a rate lower than an accelerating member operation actual amount decrease rate after the rapid releasing action determination moment, and an upper limit stop processing portion to limit the restricted amount after a determination moment that the operator requires vehicl
    Type: Application
    Filed: April 21, 2016
    Publication date: October 27, 2016
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOYOTA MOTOR EUROPE NV/SA
    Inventors: Kyohei SUZUMURA, Kosuke KUWADA, Naoyuki SAKAMOTO, Shinya TOYODA, Hiroyuki SAWADA, Sei KOJIMA, Lieven VAN HOUDT
  • Publication number: 20160131255
    Abstract: A control system and a control method for a vehicle, the vehicle includes an engine, an input shaft, an output shaft, a continuously variable transmission section, a stepped transmission section and a clutch mechanism, and a control device. The continuously variable transmission section and the stepped transmission section are provided between the input shaft and the output shaft. The clutch mechanism is provided in a torque transmission path between the stepped transmission section and drive wheels. The control device is configured to disengage the clutch mechanism in a case where a vehicle speed is at least equal to a specified value and the engine is stopped.
    Type: Application
    Filed: June 12, 2013
    Publication date: May 12, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi TANINAKA, Hirofumi NAKADA, Michio YOSHIDA, Hiroki KONDO, Kenji MATSUO, Kazuya ISHIIZUMI, Daisuke INOUE, Kyohei SUZUMURA
  • Publication number: 20160017994
    Abstract: A hydraulic control system for a vehicle having a continuously variable transmission in which a torque transmitting capacity thereof is changed hydraulically, and an engagement device which is connected to the continuously variable transmission in series and in which a torque transmitting capacity thereof is changed hydraulically. The hydraulic control system comprises a selecting means that selects a command pattern for setting an engagement pressure of the engagement device out of a plurality of patterns when an initial pressure is lower than a steady pressure for a normal running of the vehicle. The selecting means is configured to select the command pattern in such a manner that the torque transmitting capacity of the engagement device does not exceeds the torque transmitting capacity of the continuously variable transmission, based on at least any of conditions of the initial pressure that is lowered to be lower than the steady pressure, and a rotational speed of the continuously variable transmission.
    Type: Application
    Filed: June 5, 2013
    Publication date: January 21, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kyohei SUZUMURA, Shinya TOYODA, Kazuya ISHIIZUMI, Akira HINO, Sei KOJIMA