Patents Assigned to JATCO Ltd
  • Publication number: 20210003200
    Abstract: A transmission includes: a torque converter; a transmission input shaft; a seal member sandwiched between the hollow shaft and the transmission input shaft; and a bush, the transmission input shaft including a large diameter portion abutted on the seal member, and a small diameter portion which is positioned on the tip end side of the large diameter portion, and which has a diameter smaller than a diameter of the large diameter portion, the seal member having a diameter larger than a diameter of the bush, and the small diameter portion having an axial length set to be longer than a length from an insertion inlet of the transmission input shaft of the bush to the seal member.
    Type: Application
    Filed: January 28, 2019
    Publication date: January 7, 2021
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventor: Yasuhiro ISHIKAWA
  • Patent number: 10871224
    Abstract: A controller executes a feedback control of a transmission so that an actual speed ratio reaches a target speed ratio. The controller includes first and second phase lead compensators configured to perform phase lead compensation of a feedback primary command pressure, a lead compensation on/off determination unit configured to determine to set on or off the phase lead compensation, and an advance amount filter unit configured to smooth a change of a gain according to on/off determination of the phase lead compensation when the phase lead compensation is on/off-switched.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: December 22, 2020
    Assignee: JATCO LTD
    Inventor: Ken Okahara
  • Publication number: 20200393037
    Abstract: The continuously variable transmission includes a transmission case having a side cover, a housing, and a case sandwiched between the side cover and the housing, an oil pump disposed in the transmission case, and a pair of gears disposed in the transmission case. An axial rib having a linear shape extending from the side cover toward the housing is formed on an outer wall surface of the case at a position adjacent to the pair of gears. The axial rib is positioned on a straight line extending from the oil pump in the vertical direction and is locally positioned at a position where the meshing reaction force of the pair of gears is suppressed.
    Type: Application
    Filed: January 10, 2019
    Publication date: December 17, 2020
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Tsutomu ITOU, Dai SUGIYAMA, Satoru NARUOKA
  • Patent number: 10851887
    Abstract: A pulley propulsion device for an automatic transmission, which includes a fixed pulley, and a movable pulley constituted capable of relative displacement along a rotation axis of a pulley with respect to the fixed pulley, is provided. The pulley propulsion device includes a movable member constituted capable of relative rotation around a rotation axis of the pulley with respect to the movable pulley, a fixed member whose rotation with respect to a pulley case is regulated and adapted to give linear displacement to the movable member along the rotation axis of the pulley on the basis of rotation thereof, a driving mechanism having an electric motor and adapted to cause an output torque of the electric motor to be transmitted to the movable member and to cause the movable pulley to generate a predetermined pulley thrust, and a load sensor adapted to detect a load applied on the fixed member.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: December 1, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventor: Takanori Hagihara
  • Publication number: 20200362959
    Abstract: A controller performs control in a vehicle having a planetary gear mechanism, a forward clutch, an engine rotation sensor. a PRI rotation sensor, and a rotation sensor. The controller determines a rotation direction of a primary pulley corresponding to a rotation direction of a carrier on the basis of a rotation speed corresponding to a rotation speed of a sun gear, a rotation speed corresponding to a rotation speed of the carrier C, and a rotation speed of a ring gear, respectively.
    Type: Application
    Filed: August 6, 2018
    Publication date: November 19, 2020
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventor: Seiya KITAGAWA
  • Publication number: 20200361445
    Abstract: A control device for a vehicle having: an engine; a torque converter having a lock-up clutch; an engagement element disposed downstream of the torque converter; a drive shaft disposed downstream of the engagement element; and an electric motor disposed downstream of the engagement element, and connected to the drive shaft includes a control portion adapted to: in a case where an electric travel mode in which the lock-up clutch and the engagement element are disengaged is switched to an engine travel mode in which the lock-up clutch is disengaged and the engagement element is engaged, decrease driving torque of the electric motor after engagement of the engagement element; and gradually decrease the driving torque of the electric motor while gradually increasing driving torque of the engine after the driving torque of the electric motor is decreased.
    Type: Application
    Filed: July 27, 2018
    Publication date: November 19, 2020
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Masaharu MOCHIZUKI, Yoshimasa NISHIHIRO, Takashi ENOMOTO
  • Patent number: 10837547
    Abstract: An oil pressure control device has a mechanical oil pump (O/P) driven by a motor/generator (MG), an electric oil pump (M/O/P) driven by a sub motor (S/M) and a line pressure regulating valve (104). In a case where a state is changed from a state in which the motor/generator (MG) is stopped and the electric oil pump (M/O/P) is driven to a state in which the motor/generator (MG) is started and the electric oil pump (M/O/P) is stopped, when a total flow amount of a working fluid discharge flow amount of the mechanical oil pump (O/P) and a working fluid discharge flow amount of the electric oil pump (M/O/P) is equal to or greater than a pressure regulation limit flow amount of the pressure regulating valve (104), the working fluid discharge flow amount of the electric oil pump (M/O/P) is decreased.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: November 17, 2020
    Assignee: JATCO LTD
    Inventors: Yutaka Shimizu, Shusaku Katakura, Yusuke Ota, Tomoyuki Koike, Yukiyoshi Inuta, Youko Yoshioka
  • Patent number: 10837541
    Abstract: Provided is a lubricant guiding structure in an automatic transmission in which a baffle plate configured to regulate the movement of a lubricant agitated by a driven sprocket is provided at one side, where an oil pump is located, in the direction of a rotational axis of the driven sprocket. As viewed from the rotational axis direction, a division wall disposed to extend across a chain is provided closer to the chain than a base of the baffle plate. As viewed from the rotational axis direction, the baffle plate is provided with a guide wall extending along a torque transmission-side chain of the chain wound on the driven sprocket. As viewed from the rotational axis-direction, the guide wall includes an inclined portion inclined in the direction coming closer to the chain as the distance to the distal end side decreases.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: November 17, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Tsutomu Itou, Tou Ou, Shinji Higashide, Yoshiteru Ueno
  • Publication number: 20200355264
    Abstract: A lockup disengagement control device for an automatic transmission including a torque converter including a lockup clutch, and a lockup control section, the lockup disengagement control device includes: when a brake is operated from a brake OFF to a brake ON during a coast traveling in an engagement state of the lockup clutch, the lockup control section being configured to sense an initial deceleration by the brake ON operation, and to set a lockup release vehicle speed to be higher as an absolute value of the initial deceleration is greater, and when a vehicle speed is sensed to be equal to or smaller than the set lockup release vehicle speed in a middle of a brake deceleration scene by the brake ON operation, the lockup control section being configured to disengage the lockup clutch.
    Type: Application
    Filed: January 17, 2019
    Publication date: November 12, 2020
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Koji SAITO, Akira NAKAINKYO, Naoyasu IKEDA, Xuming WANG
  • Publication number: 20200347924
    Abstract: A continuously variable transmission includes a variator having a belt wound around a pair of pulleys, and a case forming a container chamber for the variator. The pulleys include fixed pulleys and movable pulleys. The belt includes elements stacked to be arranged in an annular form, and rings binding the element stacked. A circumference wall portion of the case is provided with a monitoring hole enabling flank faces of the elements to be monitored.
    Type: Application
    Filed: December 6, 2018
    Publication date: November 5, 2020
    Applicant: JATCO Ltd
    Inventors: Kazuyoshi KOBAYASHI, Masao ARIMATSU, Masayuki FURUYA, Kenichi YAMAMOTO, Shogo FUJII, Masakazu TAMURA, Kazuya NUMATA, Hirohisa YUKAWA
  • Patent number: 10821984
    Abstract: A gear shift control device for a continuously variable transmission of a vehicle is configured to steplessly and continuously change and output a rotation speed of an engine. The gear shift control device includes a gear shift control unit and a torque control command unit. The gear shift control unit is configured to implement a pseudo-stepped upshift control to change a gear shift ratio in steps when upshifting the continuously variable transmission. The torque control command unit is configured to output a torque reduction command so as to reduce an engine torque in conjunction with the pseudo-stepped upshift control so that reduction of the engine torque starts before a point in time when an actual gear shift ratio starts changing in response to an upshift command.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: November 3, 2020
    Assignee: Jatco Ltd.
    Inventors: Mitsuki Ishizuka, Tomoaki Kabe, Nobuhiko Morifuji, Hitoshi Goka, Takayuki Ogata
  • Publication number: 20200332883
    Abstract: A side cover of a continuously variable transmission includes a recess portion supporting a bearing and a recess portion supporting a bearing. The recess portions are connected to each other through a lubricant path. An oil path into which a small diameter portion of a pipe-shaped member is inserted and a connection oil path connecting between the oil path and the lubricant path are connected to each other via a boss portion. The side cover includes a circumference wall portion provided with a plurality of bolt holes. The boss portion is disposed at a position between two of the bolt holes adjacent to each other in a circumference direction.
    Type: Application
    Filed: November 15, 2018
    Publication date: October 22, 2020
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Toshiyuki FUJII, Tsutomu ITOU
  • Patent number: 10808840
    Abstract: A transmission control device controls a CVT installed in a vehicle. The device has, as modes for the CVT, a CVT mode M1 for changing a transmission gear ratio steplessly based on the operating state of the vehicle, and a stepped transmission mode M2 for changing the transmission gear ratio stepwise based on the operating state of the vehicle. The device includes a transmission mode switching control unit (controller) 12 for controlling switching between the CVT mode M1 and the stepped transmission mode M2 based on an actual accelerator opening. The transmission mode switching control unit (controller) 12 performs switching from the CVT mode M1 to the stepped transmission mode M2, if the actual accelerator opening reaches or exceeds a first threshold value T1 set in a plurality of stages so as to increase stepwise in accordance with an increase in a vehicle speed.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: October 20, 2020
    Assignees: MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA, JATCO LTD
    Inventors: Noritaka Aoyama, Azusa Shimoda, Masataka Ohtsuka, Ken Hirashita, Nobuhiko Morifuji, Mitsuki Ishizuka, Hiromasa Masuda, Yukinobu Sakakibara
  • Patent number: 10801613
    Abstract: Provided is a lock-up clutch control device of a vehicle in which a torque converter with a lock-up clutch is disposed between an engine and a transmission. This control device has a coasting capacity learning control section configured to decrease a LU differential pressure command value for the lock-up clutch during accelerator release operation and, when a slip of the lock-up clutch is detected during decrease of the LU differential pressure command value, update the LU differential pressure command value at the time of detection of the slip as a LU differential pressure learning value balanced with a coasting torque. The coasting capacity learning control section is further configured to, when operation of the PTC heater intervenes during coasting capacity learning control, correct the LU differential pressure command value by adding thereto a LU differential pressure correction value that corresponds to an increase of input torque to the lock-up clutch.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: October 13, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventor: Kohei Kamiya
  • Publication number: 20200318736
    Abstract: A controller changes a shift line of the continuously variable transmission to a high rotation side when execution of automatic brake is detected during sailing stop which stops the engine while driving the vehicle.
    Type: Application
    Filed: April 12, 2017
    Publication date: October 8, 2020
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventor: Yusuke OOTA
  • Patent number: 10793156
    Abstract: A vehicle control device is for a vehicle having a drive source, and an automatic transmission connected to the drive source, the automatic transmission having an engagement element for disconnecting/connecting transmission of a driving force and a variator placed further upstream than the engagement element. The vehicle control device includes first and second control units. The first control unit is configured to execute sailing stop control to stop the drive source and to put the automatic transmission into a neutral state when a sailing stop condition is established. The second control unit is configured to start the drive source and to implement downshifting of the variator when a size of a deceleration level is a prescribed value or greater when the sailing stop control is cancelled due to a prescribed sailing stop cancellation condition among sailing stop cancellation conditions being established, and to engage the engagement element after the downshifting.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: October 6, 2020
    Assignee: Jatco Ltd.
    Inventors: Yukifumi Ootsuka, Masayoshi Nakasaki, Yoshimasa Nishihiro
  • Patent number: 10794481
    Abstract: A continuously variable transmission is mounted in a vehicle, and includes a primary pulley, a secondary pulley, and a belt, wherein the belt is wound around the primary pulley and the secondary pulley. A control device performs a low speed position return control by a feedback control employing a control input integral component. The low speed position return control is to control a transmission ratio to a final target transmission ratio for lower speed position while the vehicle is decelerating. The control device performs a limiting control in response to a condition that the transmission ratio has reached the final target transmission ratio during the low speed position return control. The limiting control is to limit the control input integral component based on thrust balance between the primary pulley and the secondary pulley so as to maintain the transmission ratio at the final target transmission ratio.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: October 6, 2020
    Assignee: JATCO LTD
    Inventor: Iori Oota
  • Publication number: 20200300357
    Abstract: A transmission control device controls a CVT installed in a vehicle. The device has, as modes for the CVT, a CVT mode M1 for changing a transmission gear ratio steplessly based on the operating state of the vehicle, and a stepped transmission mode M2 for changing the transmission gear ratio stepwise based on the operating state of the vehicle. The device includes a transmission mode switching control unit (controller) 12 for controlling switching between the CVT mode M1 and the stepped transmission mode M2 based on an actual accelerator opening. The transmission mode switching control unit (controller) 12 performs switching from the CVT mode M1 to the stepped transmission mode M2, if the actual accelerator opening reaches or exceeds a first threshold value T1 set in a plurality of stages so as to increase stepwise in accordance with an increase in a vehicle speed.
    Type: Application
    Filed: October 10, 2018
    Publication date: September 24, 2020
    Applicants: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, JATCO Ltd
    Inventors: Noritaka AOYAMA, Azusa SHIMODA, Masataka OHTSUKA, Ken HIRASHITA, Nobuhiko MORIFUJI, Mitsuki ISHIZUKA, Hiromasa MASUDA, Yukinobu SAKAKIBARA
  • Patent number: 10753467
    Abstract: In a transmission control device, a controller determines failure of one of a variator input side rotation sensor and a variator output side rotation sensor. A hydraulic control circuit and the controller variably control line pressure, and in a case where the failure is determined, fix the line pressure to a predetermined value or more. The hydraulic control circuit and the controller variably control a speed ratio of a variator by a double pressure regulation method, and in a case where the failure is determined, variably control the speed ratio of the variator by a single pressure regulation method.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: August 25, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Haruka Ozono, Masahiro Hamano
  • 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