Patents by Inventor Tomoyuki Suwabe

Tomoyuki Suwabe 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: 10677349
    Abstract: Pressure regulation valve control device has line pressure regulation valve (4) having line pressure solenoid (41) and line pressure spool valve (42) and CVT control unit (8) controlling secondary pressure (Psec) by actuating the line pressure spool valve (42) by solenoid pressure (Psol) produced by controlling current command value (I) to the line pressure solenoid (41). CVT control unit (8) has abnormality control unit (81). The abnormality control unit (81) is configured to, when decrease in secondary pressure (Psec) is detected during travel, execute, during travel, abnormality control that increases solenoid pressure (Psol), supplied to line pressure spool valve (42) from line pressure solenoid (41), more than solenoid pressure (Psol) of a time when the decrease in secondary pressure (Psec) is detected. With this, even when the decrease in the pressure is detected during travel, the decrease in the pressure is suppressed during travel while reducing influence on vehicle travel.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: June 9, 2020
    Assignee: JATCO LTD
    Inventors: Soyoung Lee, Hajime Tasaka, Kokan Boku, Kosuke Abe, Tomoyuki Suwabe
  • Publication number: 20200025289
    Abstract: Pressure regulation valve control device has line pressure regulation valve (4) having line pressure solenoid (41) and line pressure spool valve (42) and CVT control unit (8) controlling secondary pressure (Psec) by actuating the line pressure spool valve (42) by solenoid pressure (Psol) produced by controlling current command value (I) to the line pressure solenoid (41). CVT control unit (8) has abnormality control unit (81). The abnormality control unit (81) is configured to, when decrease in secondary pressure (Psec) is detected during travel, execute, during travel, abnormality control that increases solenoid pressure (Psol), supplied to line pressure spool valve (42) from line pressure solenoid (41), more than solenoid pressure (Psol) of a time when the decrease in secondary pressure (Psec) is detected. With this, even when the decrease in the pressure is detected during travel, the decrease in the pressure is suppressed during travel while reducing influence on vehicle travel.
    Type: Application
    Filed: July 19, 2017
    Publication date: January 23, 2020
    Applicant: JATCO Ltd
    Inventors: Soyoung LEE, Hajime TASAKA, Kokan BOKU, Kosuke ABE, Tomoyuki SUWABE
  • Patent number: 10323744
    Abstract: Control device for continuously variable transmission (4) with auxiliary transmission having variator (20); hydraulic pressure control circuit (11) having primary pressure solenoid (11b); and transmission ratio controller (12) controlling the transmission ratio of variator (20) by feedback control. The transmission ratio controller (12) has a high limiter control unit (FIG. 5) that, when receiving a high transmission ratio limiting request, performs a high limiter control that limits the transmission ratio to a High limit line. The transmission ratio controller (12) also has a primary pressure lower limit regulation control unit (FIG. 4) that, when operation of the high limiter control is started during a time period when the transmission ratio is present at a High transmission ratio side with respect to the high limit transmission ratio, regulates a decrease of a primary command pressure to the primary pressure solenoid up to a High limiter-operated final target primary lower limit pressure.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: June 18, 2019
    Assignee: JATCO LTD
    Inventors: Tomoyuki Suwabe, Shin Tsukamoto, Youhei Ishikawa
  • Patent number: 10259321
    Abstract: A vehicle control device separately controls driving powers distributed to right and left wheels. The vehicle control device is configured to execute a vehicle posture control for reducing the driving powers transmitted from a driving source to the wheels by a request from a vehicle side. The vehicle control device includes a slip detection unit and a torque control unit. The slip detection unit is configured to detect a slip in the wheels. The torque control unit is configured to determine whether to perform a torque control after an operation of the vehicle posture control according to a detection result of the slip and a state of a transmission. The torque control is a control to control a torque input to the transmission by a request from the transmission side. The torque control unit is configured to execute the torque control on the basis of a determination result.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: April 16, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventor: Tomoyuki Suwabe
  • Patent number: 10006542
    Abstract: A control device for a continuously variable transmission includes a wheel speed difference sensing section configured to sense a wheel speed difference between the driving wheel and the driven wheel from a detection value of the first rotation speed sensor and a detection value of the second rotation speed sensor; and a clamping force increasing section configured to increase a clamping force for sandwiching a belt of the continuously variable transmission by a pulley when the wheel speed difference becomes equal to or greater than a first predetermined value, relative to a case where the wheel speed difference is smaller than the first predetermined value.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: June 26, 2018
    Assignees: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Kosuke Abe, Tomoyuki Suwabe, Shin Tsukamoto
  • Publication number: 20180073634
    Abstract: Control device for continuously variable transmission (4) with auxiliary transmission having variator (20); hydraulic pressure control circuit (11) having primary pressure solenoid (11b); and transmission ratio controller (12) controlling the transmission ratio of variator (20) by feedback control. The transmission ratio controller (12) has a high limiter control unit (FIG. 5) that, when receiving a high transmission ratio limiting request, performs a high limiter control that limits the transmission ratio to a High limit line. The transmission ratio controller (12) also has a primary pressure lower limit regulation control unit (FIG. 4) that, when operation of the high limiter control is started during a time period when the transmission ratio is present at a High transmission ratio side with respect to the high limit transmission ratio, regulates a decrease of a primary command pressure to the primary pressure solenoid up to a High limiter-operated final target primary lower limit pressure.
    Type: Application
    Filed: December 16, 2015
    Publication date: March 15, 2018
    Applicant: JATCO Ltd
    Inventors: Tomoyuki SUWABE, Shin TSUKAMOTO, Youhei ISHIKAWA
  • Publication number: 20170253119
    Abstract: A vehicle control device separately controls driving powers distributed to right and left wheels. The vehicle control device is configured to execute a vehicle posture control for reducing the driving powers transmitted from a driving source to the wheels by a request from a vehicle side. The vehicle control device includes a slip detection unit and a torque control unit. The slip detection unit is configured to detect a slip in the wheels. The torque control unit is configured to determine whether to perform a torque control after an operation of the vehicle posture control according to a detection result of the slip and a state of a transmission. The torque control is a control to control a torque input to the transmission by a request from the transmission side. The torque control unit is configured to execute the torque control on the basis of a determination result.
    Type: Application
    Filed: June 8, 2015
    Publication date: September 7, 2017
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventor: Tomoyuki SUWABE
  • Publication number: 20170219096
    Abstract: A control device for a continuously variable transmission includes a wheel speed difference sensing section configured to sense a wheel speed difference between the driving wheel and the driven wheel from a detection value of the first rotation speed sensor and a detection value of the second rotation speed sensor; and a clamping force increasing section configured to increase a clamping force for sandwiching a belt of the continuously variable transmission by a pulley when the wheel speed difference becomes equal to or greater than a first predetermined value, relative to a case where the wheel speed difference is smaller than the first predetermined value.
    Type: Application
    Filed: June 24, 2015
    Publication date: August 3, 2017
    Applicants: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Kosuke ABE, Tomoyuki SUWABE, Shin TSUKAMOTO
  • Patent number: 8301348
    Abstract: In vehicular control method and apparatus for a shift-by-wire device, a selected shift position is modified to at least one of a vehicular parking position, a neutral position, and a traveling position, the selected shift position is modified to the vehicular parking position when a power switch is switched to an OFF position, and the modification of the shift position to the vehicular parking position is inhibited when an operation pattern of an operation input section while the power switch is in the ON position is made coincident with the operation pattern prescribed as a cipher code which inhibits the shift position modification to the vehicular parking position, the operation patterns being constituted by a combination of operation patterns which would not be carried out in the operation section during an ordinary traveling.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: October 30, 2012
    Assignee: JATCO Ltd
    Inventors: Fumitaka Nagashima, Yoshiaki Ueda, Ryusuke Oshiro, Tomoyuki Suwabe
  • Publication number: 20100206118
    Abstract: In vehicular control method and apparatus for a shift-by-wire device, a selected shift position is modified to at least one of a vehicular parking position, a neutral position, and a traveling position, the selected shift position is modified to the vehicular parking position when a power switch is switched to an OFF position, and the modification of the shift position to the vehicular parking position is inhibited when an operation pattern of an operation input section while the power switch is in the ON position is made coincident with the operation pattern prescribed as a cipher code which inhibits the shift position modification to the vehicular parking position, the operation patterns being constituted by a combination of operation patterns which would not be carried out in the operation section during an ordinary traveling.
    Type: Application
    Filed: February 4, 2010
    Publication date: August 19, 2010
    Inventors: Fumitaka Nagashima, Yoshiaki Ueda, Ryusuke Oshiro, Tomoyuki Suwabe