Patents Assigned to JATCO
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Patent number: 10941855Abstract: 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: GrantFiled: August 6, 2018Date of Patent: March 9, 2021Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventor: Seiya Kitagawa
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Publication number: 20210062914Abstract: A continuously variable transmission (2) has a torque convertor (3) having a lock-up clutch (30) and a continuously variable transmission mechanism (5). A control unit (10) has a shift control unit (10C) configured to be able to perform a pseudo stepwise up-shift control that varies a transmission ratio of the continuously variable transmission mechanism (5) stepwise, a lock-up control unit (10A) configured to control an engagement state of the lock-up clutch (30), and a torque control command unit (10D) configured to perform a torque-down control of a driving source (1). When the engagement control of the lock-up clutch (30) and the pseudo stepwise up-shift control are performed at the same time, the torque control command unit (10D) configured to perform the torque-down control with a greater torque reduction mount.Type: ApplicationFiled: December 13, 2018Publication date: March 4, 2021Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Yasuhiro ENDO, Akihiro TANABE, Takahiro YAMADA, Shohei IMAJI, Masayuki MANNEN
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Patent number: 10930447Abstract: An inhibitor switch is attached to a manual shaft with a jig. The jig includes a fitting part and an engagement pin. The fitting part is spline-fitted to an outer periphery of the manual shaft. The engagement pin engages in a positioning hole of the inhibitor switch. The outer periphery of the manual shaft includes a tooth-omitted part formed by omitting at least one of spline teeth. The fitting part includes an insertion hole. The insertion hole includes an inner periphery including internal teeth and an engaging part, wherein the internal teeth meshes with the spline teeth, and wherein the engaging part engages with the tooth-omitted part. The jig is attached to the manual shaft with the engaging part engaged with the tooth-omitted part. The inhibitor switch is rotated about the rotation axis to a position allowing engagement of the positioning hole with the engagement pin.Type: GrantFiled: April 11, 2017Date of Patent: February 23, 2021Assignee: JATCO LTDInventor: Syunsuke Hinuma
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Publication number: 20210041015Abstract: A continuously variable transmission includes a case member including an outer surface on the side where a torque converter is disposed and an inner surface on the side where a driving force transmission mechanism is disposed. The case member includes a supporting hole by which a bearing that supports a third shaft is supported, a supporting hole by which a bearing that supports a fourth shaft is supported, and an oil path through which an lubricant, to be supplied to the bearing and the bearing, is supplied. The oil path protrudes from the outer surface from the case member and has a straight line shape connecting between the supporting hole and the supporting hole. Thus, components can be appropriately lubricated even when it is difficult to provide lubrication pipes.Type: ApplicationFiled: December 20, 2018Publication date: February 11, 2021Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Tou OU, Toshiyuki FUJII
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Publication number: 20210039625Abstract: A control device for a vehicle includes a drive shaft, an engine coupled to the drive shaft, an electric motor coupled to the drive shaft, and a control unit. The control unit increases a torque of the electric motor when an accelerator pedal opening increases to equal to or more than a predetermined degree of opening during switching of driving sources, and decreases the torque of the electric motor while increasing the torque of the engine after a change of the torque of the engine turns to increase.Type: ApplicationFiled: August 30, 2018Publication date: February 11, 2021Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Yoshimasa NISHIHIRO, Masaharu MOCHIZULKI, Takashi ENOMOTO
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Patent number: 10907724Abstract: A driving force transmission device includes: a gear; a case receiving the gear; a baffle plate positioned between a side surface of the gear and the case, the baffle plate including a downstream side end portion positioned at a most downstream position in a rotation direction of the gear, the case including a rib protruding toward the downstream side end portion, a clearance positioned between a surface of the rib and a surface of the baffle plate, the rib including a linear portion crossing a rotation direction of the gear.Type: GrantFiled: November 1, 2018Date of Patent: February 2, 2021Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Mitsuhiro Akiyama, Shogo Fujii, Tahei Toyoshima, Masakazu Tamura
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Publication number: 20210025492Abstract: A continuously variable transmission has a variator (4) structured to be able to continuously vary a transmission ratio and a control unit (100). The control unit (100) continuously varies a transmission ratio of the variator (4) in a continuously variable shift mode. In a manual mode in which a manual mode switch (36c) is ON, the transmission ratio is maintained. When a shift switch (36a, 36b) is operated by a driver during the manual mode, the control unit (100) performs shift of the variator (4) so as to change an input rotation speed of the variator (4) by a predetermined rotation speed (?N1) regardless of a vehicle speed.Type: ApplicationFiled: February 28, 2019Publication date: January 28, 2021Applicant: JATCO LtdInventors: Ken OKAHARA, Atsushi SHIMADA
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Publication number: 20210003200Abstract: 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: ApplicationFiled: January 28, 2019Publication date: January 7, 2021Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventor: Yasuhiro ISHIKAWA
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Patent number: 10871224Abstract: 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: GrantFiled: February 23, 2017Date of Patent: December 22, 2020Assignee: JATCO LTDInventor: Ken Okahara
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Publication number: 20200393037Abstract: 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: ApplicationFiled: January 10, 2019Publication date: December 17, 2020Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Tsutomu ITOU, Dai SUGIYAMA, Satoru NARUOKA
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Patent number: 10851887Abstract: 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: GrantFiled: October 2, 2017Date of Patent: December 1, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventor: Takanori Hagihara
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Publication number: 20200361445Abstract: 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: ApplicationFiled: July 27, 2018Publication date: November 19, 2020Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Masaharu MOCHIZUKI, Yoshimasa NISHIHIRO, Takashi ENOMOTO
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Publication number: 20200362959Abstract: 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: ApplicationFiled: August 6, 2018Publication date: November 19, 2020Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventor: Seiya KITAGAWA
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Patent number: 10837541Abstract: 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: GrantFiled: February 10, 2017Date of Patent: November 17, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Tsutomu Itou, Tou Ou, Shinji Higashide, Yoshiteru Ueno
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Patent number: 10837547Abstract: 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: GrantFiled: March 9, 2016Date of Patent: November 17, 2020Assignee: JATCO LTDInventors: Yutaka Shimizu, Shusaku Katakura, Yusuke Ota, Tomoyuki Koike, Yukiyoshi Inuta, Youko Yoshioka
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Patent number: 10837551Abstract: A control method of a continuously variable transmission mounted on a vehicle includes performing advance compensation in a speed ratio control system of the continuously variable transmission, and making an advance amount according to a vibration frequency of torsional vibration of an input shaft of the continuously variable transmission which is the advance amount of the advance compensation variable in accordance with an operation state of the vehicle. A feedback gain of speed ratio control of the continuously variable transmission performed in the speed ratio control system is variable in accordance with an operation state of the vehicle. When the advance amount is made variable, the advance amount is made variable in accordance with the feedback gain.Type: GrantFiled: August 1, 2017Date of Patent: November 17, 2020Assignees: Nissan Motor Co., Ltd., JATCO LtdInventors: Soojung Hong, Kenichi Mori, Yutaka Kaneko, Kazutaka Adachi, Ken Okahara, Masayuki Miyazono
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Publication number: 20200355264Abstract: 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: ApplicationFiled: January 17, 2019Publication date: November 12, 2020Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Koji SAITO, Akira NAKAINKYO, Naoyasu IKEDA, Xuming WANG
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Publication number: 20200347924Abstract: 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: ApplicationFiled: December 6, 2018Publication date: November 5, 2020Applicant: JATCO LtdInventors: Kazuyoshi KOBAYASHI, Masao ARIMATSU, Masayuki FURUYA, Kenichi YAMAMOTO, Shogo FUJII, Masakazu TAMURA, Kazuya NUMATA, Hirohisa YUKAWA
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Patent number: 10821984Abstract: 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: GrantFiled: November 20, 2017Date of Patent: November 3, 2020Assignee: Jatco Ltd.Inventors: Mitsuki Ishizuka, Tomoaki Kabe, Nobuhiko Morifuji, Hitoshi Goka, Takayuki Ogata
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Publication number: 20200332883Abstract: 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: ApplicationFiled: November 15, 2018Publication date: October 22, 2020Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Toshiyuki FUJII, Tsutomu ITOU