Patents Assigned to JATCO Ltd
  • Patent number: 10520082
    Abstract: A hydraulic pressure control device for a continuously variable transmission of a vehicle which a continuously variable transmission mechanism; a stepwise variable transmission mechanism; a shift control means, the hydraulic pressure control device includes: the shift control means including a line pressure control section configured to increase the line pressure to be greater than the line pressure before a generation of an oil vibration when the oil vibration is generated in at least one of actual hydraulic pressures of the primary pressure and the secondary pressure, and the line pressure control section being configured to continue the increase of the line pressure until the shift of the stepwise variable transmission mechanism is finished when the stepwise variable transmission is shifted in a state where the line pressure is increased.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: December 31, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Yoshinobu Kawamoto, Hiroyasu Tanaka
  • Patent number: 10514095
    Abstract: A control device for a continuously variable transmission mechanism of a vehicle includes: a stepwise variable transmission mechanism which is disposed in series with the continuously variable transmission mechanism, and which has at least two or more forward gear stages; and a controller configured to increase the belt capacities to be greater than the belt capacity set when an accelerator opening degree is zero, at least in a time period from a timing when the accelerator opening degree becomes zero, to a timing when a braking force is generated by a depression of a brake pedal, the controller being configured to set an increase amount with respect to the belt capacity set when the accelerator opening degree is zero, to a smaller value as a transmission gear ratio of the stepwise variable transmission mechanism is higher.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: December 24, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Yoshinobu Kawamoto, Norio Asai, Hiroyasu Tanaka
  • Patent number: 10507833
    Abstract: A vehicle control device for controlling a vehicle including an oil pump driven by a transmission of a rotation of the motor-generator; and a hydraulic pressure supply unit for supplying a hydraulic pressure to the continuously variable transmission. The hydraulic pressure is generated by regulating a pressure of an oil discharged from the oil pump. When a regenerative braking is performed by the motor-generator based on a deceleration request from a driver, the hydraulic pressure supply unit supplies a hydraulic pressure based on a first hydraulic pressure and a second hydraulic pressure to the continuously variable transmission. The first hydraulic pressure is a hydraulic pressure to transmit an input torque input to the continuously variable transmission during the regenerative braking. The second hydraulic pressure is a hydraulic pressure to shift the continuously variable transmission during the regenerative braking.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: December 17, 2019
    Assignee: JATCO LTD
    Inventors: Hiroki Iwasa, Hironori Miyaishi, Tetsuya Izumi
  • Patent number: 10507832
    Abstract: In a drive control device, a controller automatically stops an engine if an execution condition of an idling stop is satisfied, and an electric oil pump is driven during an automatic stop of the engine. A first friction engaging element establishes a starting gear position and a second friction engaging element is released when a vehicle starts. A second solenoid drains oil to be supplied to the second friction engaging element according to an indicator current. A drain degree becomes smaller by reducing the indicator current. The controller reduces the indicator current below a minimum value during the automatic stop of the engine.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: December 17, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Yoshinobu Kawamoto, Ruofeng Liu, Hideshi Wakayama
  • Patent number: 10502314
    Abstract: An oil pump driving control device of a vehicle having a main oil pump (14) that is driven by a motor/generator (4) and produces a pump discharge oil to a first clutch (3), a second clutch (5) and a belt-type continuously variable transmission (6) provided on a driving force transmission line. A hybrid control module (81) is provided in this FF hybrid vehicle. The hybrid control module (81) is configured to perform a control so that during vehicle stop, the lower an ATF oil temperature is, the more the pump driving energy to drive the main oil pump (14) is decreased. With this control, consumption energy during the vehicle stop can be reduced.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: December 10, 2019
    Assignee: JATCO LTD
    Inventors: Takanobu Mouri, Taiichi Onoyama, Seishi Shimamura, Kakuzou Kaneko, Akihiro Toyofuku, Ryuichi Arai, Ryuzo Noguchi, Satoshi Harui, Hironori Miyaishi, Tomoyuki Mizuochi, Kenichi Watanabe, Masumi Fujikawa, Kouichi Kotsuji, Shingo Suzuki, Akito Suzuki, Tetsuya Izumi, Keisuke Iwado, Kazuhiro Miyachi
  • Patent number: 10501083
    Abstract: A vehicle control device includes control means for executing coasting control, in which a friction engaging element is disengaged and a rotation speed of a rotary shaft of a drive source is set at zero, when a shift range corresponds to a travel range and a coasting condition is established, and the control means executes the coasting control when the shift range is modified to a neutral range.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: December 10, 2019
    Assignee: JATCO LTD
    Inventors: Yusuke Nakano, Yusuke Ota, Yoshimasa Nishihiro, Masayoshi Nakasaki, Yukifumi Ootsuka, Takuro Kawasumi, Shintaro Oshio
  • Patent number: 10495221
    Abstract: A control device for a vehicle controlling the vehicle including a driving source and an automatic transmission coupled to the driving source and includes a power transmission mechanism including a forward engaging element. The control device for the vehicle includes a first control unit configured to execute a driving-source-stop-while-traveling control that stops the driving source and brings the automatic transmission into a neutral state when a driving-source-stop-while-traveling condition for stopping the driving source while traveling is satisfied and a second control unit configured to engage the forward engaging element on the basis of input and output rotation speeds of the power transmission mechanism after a driving-source-stop-while-traveling cancellation condition is satisfied.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: December 3, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Yoshimasa Nishihiro, Masayoshi Nakasaki, Naoki Kobayashi, Yusuke Oota, Shintaro Ohshio
  • Patent number: 10495222
    Abstract: A control device for an automatic transmission includes: a transmission gear ratio control section configured to control the transmission gear ratio so that a rotation speed of the output element rapidly becomes closer to a rotation speed of the internal combustion engine, a first engagement control section configured to perform a first engagement control to be brought to the full engagement state after the rotation of the internal combustion engine is increased in the slip engagement state while a torque transmission capacity of the lockup clutch is increased when the lockup clutch is switched through the slip engagement state to the full engagement state by an ON operation of an accelerator of the vehicle, the transmission gear ratio control being prohibited during the first engagement control by the first engagement control section.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: December 3, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Kohei Kamiya, Tomoaki Honma, Yasuhiro Endo
  • Patent number: 10480648
    Abstract: In a vehicle equipped with a torque converter (4) having a lock-up clutch (3), learning control for obtaining a learning value (L_n) on the basis of meet-point information, with which the lock-up clutch (3) initiates torque transmission, is carried out. After acquiring the current learning detection value (M_n), a meet-point learning control unit (12c) calculates the current detection error (E_n) on the basis of the difference between the current learning detection value (M_n) and the previous learning value (L_(n?1)) that is stored. When the current and previous detection errors (E_n) and (E_n?1) have the same plus/minus sign, the current learning value correction amount is set to a larger value if the absolute value |(E_n?1)| of the previous detection error (E_n?1) is large than if the absolute value |(E_n?1)| is small. The sum of the previous learning value (L_(n?1)) and the current learning value correction amount is set as the present learning value (L_n).
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: November 19, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Toshimitsu Araki, Seiji Kasahara, Hideshi Wakayama, Hiroyasu Tanaka
  • Patent number: 10473212
    Abstract: An automatic transmission includes a mechanical oil pump, an electric oil pump, and a controller. The controller calculates a flow rate of oil necessary for the automatic transmission during the vehicle travels, and drives the electric oil pump when the calculated flow rate of the oil necessary for the automatic transmission is higher than a margin flow rate of the mechanical oil pump generated in a state where a hydraulic pressure necessary for the automatic transmission is ensured.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: November 12, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventor: Hideharu Yamamoto
  • Publication number: 20190333722
    Abstract: 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: Application
    Filed: April 11, 2017
    Publication date: October 31, 2019
    Applicant: JATCO Ltd
    Inventor: Syunsuke HINUMA
  • Patent number: 10457290
    Abstract: An FF hybrid vehicle control device having an HEV mode and an EV mode as drive modes is provided with a CVT control unit (84) for determining primary pulley pressure (Ppri) and secondary pulley pressure (Psec) with which a belt (6c) of a belt-type continuously variable transmission (6) will be clamped on the basis of a torque component inputted to the belt-type continuously variable transmission (6) during brake deceleration, and the corrected amount of brake torque which is an inertia torque correction component. The CVT control unit (84) reduces the corrected amount of brake torque during brake deceleration when EV mode is selected to be less than the corrected amount of brake torque during brake deceleration when HEV mode is selected.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: October 29, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Hironori Miyaishi, Tomoyuki Mizuochi, Akito Suzuki, Tetsuya Izumi
  • Patent number: 10449964
    Abstract: Variator (20) and forward clutch (Fwd/C) disposed in series are provided between engine (1) having starter motor (15) and driving wheel (7). Sailing stop control that, on the basis of satisfaction of sailing entering condition, interrupts power transmission by frictional engagement element (Fwd/C), stops engine (1) and performs coast-travel is performed. When sailing entering condition is satisfied, coast-travel is started with rotation stop timing of variator (20) being delayed with respect to rotation stop timing of engine (1). When accelerator pedal depression operation intervenes after start of coast-travel, engine (1) is restarted by starter motor (15). When judged that input and output rotation speeds of frictional engagement element (Fwd/C) become synchronization rotation speed after restart of engine (1), frictional engagement element (Fwd/C) is reengaged.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: October 22, 2019
    Assignee: JATCO LTD
    Inventors: Tadashi Iwamoto, Akira Takano, Masayoshi Nakasaki, Yoshimasa Nishihiro, Yukifumi Ootsuka
  • Patent number: 10421449
    Abstract: A controller is a control device for a vehicle including an engine, an automatic transmission, and an oil pump and executes a sailing stop control that stops the engine and brings the automatic transmission into a neutral state when a sailing stop condition is satisfied. The controller cancels the sailing stop control to start the engine when a road inclination becomes larger than a predetermined value during the sailing stop control.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: September 24, 2019
    Assignee: JATCO LTD
    Inventors: Yusuke Oota, Yoshimasa Nishihiro, Masayoshi Nakasaki, Naoki Kobayashi
  • Publication number: 20190283755
    Abstract: A transmission controller increases a load applied on an engine when a start condition of a sailing-stop control is met.
    Type: Application
    Filed: June 21, 2017
    Publication date: September 19, 2019
    Applicant: JATCO Ltd
    Inventors: Yoshimasa NISHIHIRO, Yusuke OOTA, Shintaro OHSHIO
  • Patent number: 10415698
    Abstract: A hydraulic control circuit includes a first pressure regulating valve for regulating a pump discharge pressure, a second pressure regulating valve for adjusting a pilot pressure to a torque converter pressure, and a first oil passage that connects an output port of the first pressure regulating valve and a torque-converter input-side oil passage, the second pressure regulating valve having an input port connected to the first oil passage through a second oil passage, a drive port connected to the first oil passage through a third oil passage, a spool axially displaced according to a drive pressure inputted into the drive port for regulating the torque converter pressure, and an output port. A throttle is provided between the connection section of the first and third oil passages and the connection section of the first and second oil passages, for adjusting the torque converter pressure to an appropriate pressure.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: September 17, 2019
    Assignee: JATCO LTD
    Inventor: Katsuo Katou
  • Publication number: 20190277394
    Abstract: An air breather chamber structure includes: a first breather chamber provided to a housing receiving a transmission; and a second breather chamber provided to an upper portion of the housing in a gravity direction, the first introduction hole being positioned on the first side of the imaginary surface, the second introduction hole being positioned on the second side of the imaginary surface, the atmosphere communication hole being positioned on the first side of the imaginary surface, the discharge hole being positioned on the second side of the imaginary surface, the first introduction hole and the discharge hole being positioned below the second introduction hole in the gravity direction, and the atmosphere communication hole being positioned above the second introduction hole in the gravity direction.
    Type: Application
    Filed: July 27, 2017
    Publication date: September 12, 2019
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Yutaka OKUMURA, Naoto SATO, Eiji SASAKI, Toshikazu SUZUKI, Hirona MATSUBARA
  • Publication number: 20190271392
    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: Application
    Filed: May 19, 2017
    Publication date: September 5, 2019
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventor: Kohei KAMIYA
  • Patent number: 10400893
    Abstract: In a transmission, a controller sets a target line pressure to an offset target value, which is a value obtained by adding a positive offset amount to one of a target PRI pressure and a target SEC pressure, in a speed ratio range in which the offset target value is higher than the other at least during an inertia phase in a sub-transmission mechanism when a coordinated shift is carried out. At that time, the one of the target PRI pressure and the target SEC pressure is the target SEC pressure when a variator is downshifted by the coordinated shift while being the target PRI pressure when the variator is upshifted by the coordinated shift.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: September 3, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Mamiko Inoue, Tomonari Uchiyama, Hideshi Wakayama
  • Publication number: 20190264802
    Abstract: A control device for an automatic transmission of a vehicle includes a shift control section including; a deceleration state judging section configured to judge whether a deceleration of the vehicle is a gentle deceleration state or a sudden deceleration state, and a downshift control section configured to command a plural stage downshift to downshift from a current shift stage of the automatic shift mechanism to a target shift stage that is lower than the current shift stage by two stages or more when the deceleration state judging section judges the sudden deceleration state.
    Type: Application
    Filed: July 19, 2017
    Publication date: August 29, 2019
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Kunihiko OKUMURA, Takeshi FUJII