Patents by Inventor Youji ITOU

Youji ITOU 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: 10753466
    Abstract: In a transmission control device for controlling a transmission, a controller determines failure of a specific section. The controller variably controls line command pressure and secondary command pressure, and in a case where the failure is determined, fixes the line command pressure to a line pressure set value and the secondary command pressure to a secondary pressure set value. In a case where the failure is determined, the controller further starts a change in the secondary command pressure after start of a change in the line command pressure, and controls the secondary command pressure in such a manner that the secondary command pressure takes a first predetermined time to have the secondary pressure set value.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: August 25, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Haruka Ozono, Youji Itou, Kosuke Abe
  • Patent number: 10704680
    Abstract: In a transmission control device for controlling a transmission, a controller determines failure of a SOL corresponding to a hydraulic secondary-pressure actuator. The controller variably controls line command pressure, and in a case where the failure is determined, fixes the line command pressure to a line pressure set value. The controller variably controls primary command pressure, and in a case where the failure is determined, continuously changes a speed ratio of a variator by variably controlling the primary command pressure. The controller variably controls secondary command pressure, and in a case where the failure is determined, fixes the secondary command pressure to a secondary pressure set value.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: July 7, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Masahiro Hamano, Youji Itou, Kosuke Abe, Haruka Ozono
  • Patent number: 10697536
    Abstract: In a transmission control device for controlling a transmission, a controller determines failure of a SOL corresponding to a hydraulic primary-pressure actuator. The controller variably controls line command pressure, and in a case where the failure is determined, continuously changes a speed ratio of a variator by variably controlling the line command pressure. The controller variably controls primary command pressure, and in a case where the failure is determined, fixes the primary command pressure to a primary pressure set value. The controller variably controls secondary command pressure, and in a case where the failure is determined, fixes the secondary command pressure to a secondary pressure set value.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: June 30, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Masahiro Hamano, Youji Itou, Kosuke Abe, Haruka Ozono
  • Patent number: 10598277
    Abstract: In a vehicle in which a continuously variable transmission, which is connected to an electric motor via a clutch, is operated using oil pressure of an oil pump driven by the motor, erroneous engagement of the clutch is quickly determined. The vehicle has the motor serving as a vehicle driving source, the oil pump connected to the motor, the continuously variable transmission, the clutch interposed between the motor and the continuously variable transmission, a clutch control means for controlling the clutch such that the clutch enters into a completely-engaged, slip-engaged, or release state, and a vehicle control means for controlling the motor such that the motor rotates at a target rotation speed. Also provided is an erroneous engagement handling control means that executes torque adjustment control to decrease an output torque of the vehicle driving source when the clutch is determined to be in an erroneously completely engaged state.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: March 24, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Norihira Amano, Youji Itou, Masahiro Hamano
  • Patent number: 10591053
    Abstract: A failure judgment device of an automatic transmission includes: a first abnormality judging section configured to judge a power supply fault abnormality or a breaking abnormality of the solenoid, from a selected shift stage and a state of the transmission mechanism, after the detection of the electric abnormality; and a second abnormality judging section configured to judge the power supply abnormality or the breaking abnormality of the solenoid, from the monitor current value when the solenoid valve is switched to an OFF state, after the detection of the electric abnormality, when one of the first abnormality judging section and the second abnormality judging section judges the power supply fault abnormality or the breaking abnormality, the judgement result being outputted.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: March 17, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Hajime Tasaka, Youji Itou, Masahiro Hamano, Naonori Iizuka, Norihira Amano, Heo Chang Moo
  • Patent number: 10549761
    Abstract: An automatic transmission includes an oil temperature detecting unit configured to detect an oil temperature of the hydraulic oil, and a controller configured to perform the control of the speed ratio on a basis of the oil temperature obtained from the oil temperature detecting unit. The controller is configured such that if the controller has failed to obtain the oil temperature from the oil temperature detecting unit, the controller outputs a command to restrict an output from the driving force source, and such that if the controller has obtained the oil temperature from the oil temperature detecting unit again, the controller gradually cancels the command to restrict the output from the driving force source.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: February 4, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Norihira Amano, Youji Itou, Kosuke Abe
  • Patent number: 10527163
    Abstract: The present invention is a control device for an automatic transmission, the control device being adapted to control the automatic transmission including a torque converter and a stepped transmission mechanism provided on a power transmission route from the torque converter to drive wheels, wherein while a non-driving range of the automatic transmission is selected, determination on interlock in the stepped transmission mechanism is executed on the basis of deceleration of an output shaft of the stepped transmission mechanism and a change in the torque converter.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: January 7, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Masahiro Hamano, Youji Itou, Haruka Kondo, Norihira Amano
  • Patent number: 10344853
    Abstract: A hydraulic switch malfunction assessment device includes a solenoid valve disposed in a hydraulic circuit of an automatic transmission and having a characteristic such that a hydraulic pressure supplied to a frictional engagement element changes due to a change in an electric current supplied to the solenoid valve, and a hydraulic switch interposed between the solenoid valve and the frictional engagement element and configured to output an ON signal when the hydraulic pressure is higher than or equal to a threshold value and output an OFF signal when the hydraulic pressure is less than the threshold value. Also provided is a controller configured to control the supplied current to a prescribed current value or less when a predetermined running condition has been met, and then assess a malfunction of the hydraulic switch, based on a state of operation of the solenoid valve and the signal from the hydraulic switch.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: July 9, 2019
    Assignee: JATCO LTD
    Inventors: Takamitsu Shimazu, Youji Itou
  • Patent number: 10247304
    Abstract: A control device for a continuously variable transmission of a vehicle includes a shift control section being configured to perform a rough road corresponding control to increase the hydraulic pressure to a value larger than the hydraulic pressure at a smooth road judgment at which the smooth road is judged, at a rough road judgment at which the rough road is judged, and when a line-pressure-up control condition is satisfied at the rough road judgment, the line pressure control section being configured to increase the line pressure to be greater than the line pressure when the line-pressure-up control condition is not satisfied.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: April 2, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Kiyofumi Sasaki, Youji Itou, Kosuke Abe
  • Publication number: 20190040949
    Abstract: In a vehicle in which a continuously variable transmission, which is connected to an electric motor via a clutch, is operated using oil pressure of an oil pump driven by the motor, erroneous engagement of the clutch is quickly determined. The vehicle has the motor serving as a vehicle driving source, the oil pump connected to the motor, the continuously variable transmission, the clutch interposed between the motor and the continuously variable transmission, a clutch control means for controlling the clutch such that the clutch enters into a completely-engaged, slip-engaged, or release state, and a vehicle control means for controlling the motor such that the motor rotates at a target rotation speed. Also provided is an erroneous engagement handling control means that executes torque adjustment control to decrease an output torque of the vehicle driving source when the clutch is determined to be in an erroneously completely engaged state.
    Type: Application
    Filed: January 27, 2017
    Publication date: February 7, 2019
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Norihira AMANO, Youji ITOU, Masahiro HAMANO
  • Patent number: 10119611
    Abstract: A control device for a continuously variable transmission of a vehicle includes: a shift control section being configured to perform a rough road corresponding control to increase the hydraulic pressure supplied to the secondary pulley to a value larger than the hydraulic pressure at a smooth road judgment at which the smooth road is judged, at a rough road judgment at which the rough road is judged, and thereby to increase the clamping force of the secondary pulley with respect to the circular belt member; and a rotation speed control section being configured to control the transmission gear ratio at the rough road judgment so that a rotation speed of the primary pulley becomes equal to or greater than a lower limit rotation speed which is previously set.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: November 6, 2018
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Kiyofumi Sasaki, Youji Itou, Kosuke Abe
  • Publication number: 20180283541
    Abstract: A transmission controller is configured to determine whether an output rotation speed sensor has a failure or not on the basis of a detected value by the output rotation speed sensor, and if the output rotation speed sensor is determined to have a failure, executes a fail-safe control which controls the pressure regulating valve such that the primary pressure becomes a predetermined high pressure regardless of the instruction pressure and inhibits a failure determination of the pressure regulating valve on the basis of a difference between the instruction pressure and a detected value by the primary pressure sensor.
    Type: Application
    Filed: September 1, 2016
    Publication date: October 4, 2018
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Tatsuya SUDO, Youji ITOU, Kosuke ABE
  • Publication number: 20180283540
    Abstract: The present invention is a control device for an automatic transmission, the control device being adapted to control the automatic transmission including a torque converter and a stepped transmission mechanism provided on a power transmission route from the torque converter to drive wheels, wherein while a non-driving range of the automatic transmission is selected, determination on interlock in the stepped transmission mechanism is executed on the basis of deceleration of an output shaft of the stepped transmission mechanism and a change in the torque converter.
    Type: Application
    Filed: September 14, 2016
    Publication date: October 4, 2018
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Masahiro HAMANO, Youji ITOU, Haruka KONDO, Norihira AMANO
  • Publication number: 20180274672
    Abstract: A controller is a control device for a transmission, the transmission provided in a vehicle and having a variator and a rotation sensor. The controller decides electrical abnormality of the rotation sensor when an electrical abnormality detection state of the rotation sensor is continued for a set time. The controller also decides functional abnormality of the rotation sensor when rotation speed is included in an abnormality detection region of the functional abnormality, and inhibits a decision on the functional abnormality during counting of the set time.
    Type: Application
    Filed: September 13, 2016
    Publication date: September 27, 2018
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Haruka KONDO, Youji ITOU, Masahiro HAMANO, Norihira AMANO
  • Publication number: 20180259066
    Abstract: A transmission controller is configured such that if an input rotation speed sensor is determined to have a failure, the transmission controller executes a fail-safe control and inhibits a failure determination of a secondary pressure solenoid valve on the basis of a difference between a secondary instruction pressure and a detected value by a secondary pressure sensor. The fail-safe control is configured to set the secondary instruction pressure to be a predetermined high pressure.
    Type: Application
    Filed: September 1, 2016
    Publication date: September 13, 2018
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Tatsuya SUDO, Youji ITOU, Kosuke ABE
  • Publication number: 20180244284
    Abstract: An automatic transmission includes an oil temperature detecting unit configured to detect an oil temperature of the hydraulic oil, and a controller configured to perform the control of the speed ratio on a basis of the oil temperature obtained from the oil temperature detecting unit. The controller is configured such that if the controller has failed to obtain the oil temperature from the oil temperature detecting unit, the controller outputs a command to restrict an output from the driving force source, and such that if the controller has obtained the oil temperature from the oil temperature detecting unit again, the controller gradually cancels the command to restrict the output from the driving force source.
    Type: Application
    Filed: August 26, 2016
    Publication date: August 30, 2018
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Norihira AMANO, Youji ITOU, Kosuke ABE
  • Publication number: 20180245686
    Abstract: In a transmission control device for controlling a transmission, a controller determines failure of a SOL corresponding to a hydraulic secondary-pressure actuator. The controller variably controls line command pressure, and in a case where the failure is determined, fixes the line command pressure to a line pressure set value. The controller variably controls primary command pressure, and in a case where the failure is determined, continuously changes a speed ratio of a variator by variably controlling the primary command pressure. The controller variably controls secondary command pressure, and in a case where the failure is determined, fixes the secondary command pressure to a secondary pressure set value.
    Type: Application
    Filed: February 17, 2016
    Publication date: August 30, 2018
    Applicants: JATCO Ltd, Nissan Motor Co., Ltd.
    Inventors: Masahiro HAMANO, Youji ITOU, Kosuke ABE, Haruka OZONO
  • Publication number: 20180106368
    Abstract: A failure judgment device of an automatic transmission includes: a first abnormality judging section configured to judge a power supply fault abnormality or a breaking abnormality of the solenoid, from a selected shift stage and a state of the transmission mechanism, after the detection of the electric abnormality; and a second abnormality judging section configured to judge the power supply abnormality or the breaking abnormality of the solenoid, from the monitor current value when the solenoid valve is switched to an OFF state, after the detection of the electric abnormality, when one of the first abnormality judging section and the second abnormality judging section judges the power supply fault abnormality or the breaking abnormality, the judgement result being outputted.
    Type: Application
    Filed: February 17, 2016
    Publication date: April 19, 2018
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Hajime TASAKA, Youji ITOU, Masahiro HAMANO, Naonori IIZUKA, Norihira AMANO, Heo Chang MOO
  • Publication number: 20180080548
    Abstract: In a transmission control device for controlling a transmission, a controller determines failure of a specific section. The controller variably controls line command pressure and secondary command pressure, and in a case where the failure is determined, fixes the line command pressure to a line pressure set value and the secondary command pressure to a secondary pressure set value. In a case where the failure is determined, the controller further starts a change in the secondary command pressure after start of a change in the line command pressure, and controls the secondary command pressure in such a manner that the secondary command pressure takes a first predetermined time to have the secondary pressure set value.
    Type: Application
    Filed: February 17, 2016
    Publication date: March 22, 2018
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Haruka OZONO, Youji ITOU, Kosuke ABE
  • Publication number: 20180080547
    Abstract: In a transmission control device for controlling a transmission, a controller determines failure of a SOL corresponding to a hydraulic primary-pressure actuator. The controller variably controls line command pressure, and in a case where the failure is determined, continuously changes a speed ratio of a variator by variably controlling the line command pressure. The controller variably controls primary command pressure, and in a case where the failure is determined, fixes the primary command pressure to a primary pressure set value. The controller variably controls secondary command pressure, and in a case where the failure is determined, fixes the secondary command pressure to a secondary pressure set value.
    Type: Application
    Filed: February 17, 2016
    Publication date: March 22, 2018
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Masahiro HAMANO, Youji ITOU, Kosuke ABE, Haruka OZONO