Patents Assigned to JTEKT Corporation
  • Patent number: 11747230
    Abstract: A sensor device includes a main driving gear, driven gears, an biasing member configured to bias the driven gears toward the main driving gear, a support member configured to support the biasing member, and a sensor configured to generate an electrical signal based on rotation of the driven gears. In a force applied when the biasing member biases the driven gears, assuming that a direction orthogonal to a tangent line at a point of action of the force is set as a first direction, the first direction is different from a second direction.
    Type: Grant
    Filed: December 21, 2021
    Date of Patent: September 5, 2023
    Assignee: JTEKT CORPORATION
    Inventors: Yuichi Toyama, Toshiaki Murakami
  • Patent number: 11745792
    Abstract: A steering device includes a steering member, a steering operation mechanism, a reactive force motor, a steering motor that drives the steering operation mechanism, a steering torque sensor, and an electronic control unit. The electronic control unit sets a manual steering angle command value. The electronic control unit computes a reactive-force-related composite angle command value. The electronic control unit computes a steering-related composite angle command value based on a steering-related automatic steering angle command value and the manual steering angle command value. The electronic control unit causes a rotational angle of the reactive force motor to follow the reactive-force-related composite angle command value. The electronic control unit causes a rotational angle of the steering motor to follow the steering-related composite angle command value. The electronic control unit estimates a first disturbance torque.
    Type: Grant
    Filed: July 9, 2021
    Date of Patent: September 5, 2023
    Assignee: JTEKT CORPORATION
    Inventors: Naoki Shoji, Tomohiro Nakade, Robert Fuchs
  • Publication number: 20230272299
    Abstract: The present invention relates to a grease composition including: a base oil; a thickener; a rust inhibitor; and an extreme pressure agent, in which the rust inhibitor includes, with respect to a total mass of the grease composition: 0.10 mass % to 10.00 mass % of a calcium sulfonate; 0.20 mass % to 10.00 mass % of a zinc sulfonate; and 0.10 mass % to 10.00 mass % of a zinc carboxylate, and the extreme pressure agent includes, with respect to the total mass of the grease composition, 2.00 mass % to 14.00 mass % of a zinc dialkyldithiophosphate.
    Type: Application
    Filed: July 5, 2021
    Publication date: August 31, 2023
    Applicants: JTEKT CORPORATION, KYODO YUSHI CO., LTD.
    Inventors: Kanako NIIYA, Kazunori MIYAKE, Masayuki MURAKAMI, Shota AKIMOTO, Takahiro MAEDA, Kaname NISHI, Michitaka YOSHIHARA, Kazuki ISA, Koki ANDO
  • Publication number: 20230275243
    Abstract: A fuel cell includes a discharge structure that discharges water generated in a cathode electrode in association with an electrode reaction in the MEA to the outside. The discharge structure includes a discharge path through which air that is an oxidant flows, a passage that communicably connects an oxidant supply flow path and the discharge path and that moves water generated in the cathode electrode to the discharge path, and a discharge portion that discharges the generated water moved to the discharge path to the outside.
    Type: Application
    Filed: August 25, 2021
    Publication date: August 31, 2023
    Applicants: JTEKT CORPORATION, NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITY
    Inventors: Takuya TSUJIGUCHI, Yasuhide TAKEDA, Motoo NAKAI, Toshiyuki SAITO, Atsushi KUBO, Mototake FURUHASHI, Ayumi NAKASONE, Atsushi NAKANE, Fumitaka ACHIWA
  • Patent number: 11738798
    Abstract: A turning control system includes a controller. The controller is configured to perform a decrease process of decreasing a magnitude of an angle operation amount which is reflected in an operation process with respect to the magnitude of the angle operation amount calculated in an angle operation amount calculating process when a vehicle speed is equal to or lower than a prescribed speed and a magnitude of an input torque of a steering wheel is equal to or less than a prescribed value. The controller is configured to perform a correction process of correcting an input when the decrease process is performed such that a magnitude of the input decreases when an angle command value calculating process calculates an angle command value.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: August 29, 2023
    Assignee: JTEKT CORPORATION
    Inventor: Terutaka Tamaizumi
  • Publication number: 20230259328
    Abstract: An information provision system includes a processor and a memory storing instructions that, when executed by the processor, cause the information provision system to perform operations. The operations include: acquiring position information of a user and line-of-sight direction information of the user; estimating a target visually recognized by the user based on the position information, the line-of-sight direction information, and target position information for targets visually recognizable by the user; outputting, by sound, description information about the target in accordance with a setting; detecting a motion of a head of the user; estimating an intention of the user based on the motion during output of the description information; selecting the setting in accordance with the intention; and outputting, in response to change of the setting, the description information in accordance with the setting after the change.
    Type: Application
    Filed: February 15, 2023
    Publication date: August 17, 2023
    Applicants: JTEKT CORPORATION, connectome.design Inc.
    Inventors: Hiroki UMEZAWA, Yoshiyuki SHIBATA, Takashi MATSUMOTO, Akira SATO
  • Publication number: 20230258256
    Abstract: A pulley body has a first flange and a fitting protrusion. The flange body has a second flange and a fitting recess fitted to the fitting protrusion. The fitting recess has an inner surface including, in a radially inward direction, a first inclined surface inclined so as to approach the first flange, as extending in the radially inward direction. The fitting protrusion has a distal end surface including, in the radially inward direction, a second inclined surface facing the first inclined surface. The flange body has an outer peripheral surface that faces an inner peripheral surface of the pulley body, and has a protrusion which continues in a circumferential direction with no end. A region including an annular-shaped area between the first and second inclined surfaces includes a joint portion of a molten resin.
    Type: Application
    Filed: February 2, 2023
    Publication date: August 17, 2023
    Applicants: JTEKT CORPORATION, NAKANISHI METAL WORKS CO., LTD.
    Inventors: Ayumi YAMAMORI, Shuhei YAMASHITA, Masayoshi NAKAMURA, Ryotaro TANIGUCHI
  • Patent number: 11724732
    Abstract: A steering control device includes an electronic control unit configured to i) detect an absolute steering angle, ii) determine whether movement of a turning shaft to one of right and left sides has been limited, iii) acquire a limit position determination angle corresponding to the absolute steering angle detected when the electronic control unit determines that the movement of the turning shaft has been limited, and iv) set an end-position-corresponding angle based on the limit position determination angle, the end-position-corresponding angle being an angle indicating that the turning shaft is located at a right or left end position, and the end-position-corresponding angle being associated with the absolute steering angle.
    Type: Grant
    Filed: September 22, 2020
    Date of Patent: August 15, 2023
    Assignee: JTEKT CORPORATION
    Inventors: Takahiro Toko, Nobuaki Kataoka, Takafumi Yamaguchi, Yukinobu Ezaki
  • Publication number: 20230242146
    Abstract: A vehicle includes a sideslip preventing function of preventing a sideslip of the vehicle by separately adjusting a longitudinal force applied to each of the wheels. A controller controls the vehicle based on requests input from a driver assistance device, thereby causing the vehicle to travel autonomously. The controller calculates wheel lateral force request values based on the requests input from the driver assistance device. The wheel lateral force request values are request values of lateral forces acting on the respective wheels. The controller, when a behavior of the vehicle is in an oversteer state in a case in which the sideslip preventing function is failing, limits the wheel lateral force request values for the front wheels to values less than or equal to a first lateral force limit value, which is a limit value of the lateral force that can act on the rear wheels.
    Type: Application
    Filed: January 26, 2023
    Publication date: August 3, 2023
    Applicants: ADVICS CO., LTD., J-QUAD DYNAMICS INC., DENSO CORPORATION, AISIN CORPORATION, JTEKT Corporation
    Inventor: Yosuke OHMORI
  • Publication number: 20230233852
    Abstract: A walking assist device includes a plurality of electrodes disposed on a surface of a leg of a user, a stimulation applier configured to apply, to the electrodes, a voltage for applying electrical stimulation to the muscles, and a control unit configured to control the stimulation applier to apply the voltage to one or more target electrodes selected from among the electrodes. The control unit controls the stimulation applier such that a combination of electrodes selected as the one or more target electrodes is different for each of a plurality of motion phases included in a motion cycle of the leg during the walking motion.
    Type: Application
    Filed: December 29, 2022
    Publication date: July 27, 2023
    Applicants: OSAKA UNIVERSITY, JTEKT CORPORATION
    Inventors: Matija MILOSEVIC, Koshi SHIBAGAKI, Taishin NOMURA, Yoshitaka KAWAKAMI, Yoshitaka YOSHIMI
  • Publication number: 20230234639
    Abstract: A steering control device includes a control unit. The control unit is configured to execute a control angle calculation process, an angle feedback process, and a standard value adjustment process. The control angle calculation process is a process of calculating a control angle as an absolute angle relative to a standard value, and the angle feedback process is a process of performing feedback control on the control angle, and the standard value adjustment process is a process of adjusting the stored standard value. The standard value adjustment process includes a process of, when, in a straight-ahead state, the control angle deviates from a value showing the straight-ahead state, adjusting the standard value such that the deviation of the control angle from the value showing the straight-ahead state decreases.
    Type: Application
    Filed: January 19, 2023
    Publication date: July 27, 2023
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi Koudai, Yuji Fujita, Yugo Nagashima, Kazuma Hasegawa, Yuuta Kajisawa, Shintaro Takayama, Hiroyuki Katayama, Yosuke Yamashita, Masaharu Yamashita
  • Patent number: 11702132
    Abstract: A steering control device includes a torque command value calculating unit configured to calculate a torque command value which is a target value of a motor torque when operation of a motor is controlled such that the motor torque is generated. The torque command value calculating unit includes a first component calculating unit configured to calculate a first component, a second component calculating unit configured to calculate a second component, and a torque component calculating unit configured to calculate a torque component. The first component calculating unit is configured to add a calculational hysteresis component to the first component such that hysteresis characteristics with respect to change of a specific state variable are provided. The torque component calculating unit is configured to perform calculation in a first calculation situation and calculation in a second calculation situation.
    Type: Grant
    Filed: March 29, 2022
    Date of Patent: July 18, 2023
    Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuki Inden, Isao Namikawa, Yuki Suehiro, Yoshio Kudo
  • Patent number: 11702128
    Abstract: A steering device includes: a mechanism configured to turn turning wheels of a vehicle; a motor configured to generate drive force that is applied to the mechanism; and a controller configured to control the motor in accordance with a steering state. The controller includes a determination circuit configured to determine whether or not one of the turning wheels is in contact with an obstacle based on at least a value of electric current that is supplied to the motor and a vehicle speed. The controller is configured to, when one of the turning wheels is in contact with the obstacle, notify a driver that one of the turning wheels is in contact with the obstacle.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: July 18, 2023
    Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Isao Namikawa, Koji Anraku, Yusuke Kakimoto, Yoshio Kudo
  • Publication number: 20230219618
    Abstract: A steer-by-wire steering system including a steering device including a steering motor and a controller configured to supply a steering current to the steering motor based on a steering request. The controller includes a plurality of microcomputers, a plurality of drive circuits, and a plurality of temperature sensors. When a detection temperature difference that is a difference between detection temperatures of any two of the plurality of temperature sensors is greater than a predetermined threshold, each of the plurality of microcomputers executes an independent calculation control to independently calculate and set a current limit value, which is an upper limit value of the steering current, based on a detection temperature of one of the plurality of temperature sensors corresponding to itself, irrespective of detection temperatures of one or more of the plurality of temperature sensors other than the one of the plurality of temperature sensors corresponding to itself.
    Type: Application
    Filed: December 16, 2022
    Publication date: July 13, 2023
    Applicants: Toyota Jidosha Kabushiki Kaisha, JTEKT CORPORATION, DENSO CORPORATION
    Inventors: Takahito ISHINO, Masaharu YAMASHITA, Kenji SHIBATA, Yosuke YAMASHITA, Shintaro TAKAYAMA, Kazuaki IIDA, Ryo YAMAZAKI, Yuuta KAJISAWA, Kenichi ABE, Toyohiro HAYASHI, Nobuyori NAKAJIMA, Hiroyasu OTAKE, Kurumi TAZUKE, Hiroki TOMIZAWA
  • Patent number: 11698141
    Abstract: A pressure reducing valve includes: a body, a valve seat, and a valve element opening and closing the valve seat according to a difference between a pressure on the inlet side and a pressure on the outlet side. A pressure chamber, which is a space part between the valve element and the valve seat, is provided on the inlet side of the valve element. The valve element includes a plurality of horizontal holes each opening to the pressure chamber, and a vertical hole bringing the horizontal holes and the outlet side of the valve element into communication with each other. The horizontal holes and the vertical hole are provided in such a manner that a value of a ratio of a flow channel area of the vertical hole to a total area that is a total of flow channel areas of the horizontal holes exceeds 1.16.
    Type: Grant
    Filed: November 29, 2021
    Date of Patent: July 11, 2023
    Assignee: JTEKT CORPORATION
    Inventors: Kazushi Numazaki, Tetsuya Kaneko, Akira Nakano, Kazuhiro Takabayashi, Kazuo Haneda, Yuya Kihara
  • Publication number: 20230212474
    Abstract: There is provided a grease composition for improving the chemical stability of the grease composition and increasing the fatigue life of a member in which the grease composition is used. The problems can be solved by a grease composition including a poly-?-olefin; a urea-based thickener; molybdenum dithiophosphate; and barium sulfonate, wherein a difference between an SP value of the urea-based thickener and an SP value of the poly-?-olefin is 3.5 or less.
    Type: Application
    Filed: April 7, 2021
    Publication date: July 6, 2023
    Applicants: JTEKT CORPORATION, ENEOS Corporation
    Inventors: Koji YOSHIZAKI, Kazunori MIYAKE, Kazumi SAKAI, Yusuke AYAME, Kiyomi SAKAMOTO
  • Patent number: 11691667
    Abstract: A steering device includes two motors each configured to generate a drive force that steers a steerable wheel of a vehicle and two controllers respectively corresponding to the two motors, each of the two controllers being configured to individually control a corresponding one of the motors. One of the two controllers is a first controller, and the other one of the two controllers is a second controller. The first controller is configured to calculate a command value corresponding to a total torque that should be generated in the two motors. The command value is divided into individual command values using a changeable distribution ratio set for each of the motors, the individual command values respectively corresponding to the motors. The two controllers are configured to respectively supply the motors with current corresponding to the individual command values.
    Type: Grant
    Filed: August 19, 2020
    Date of Patent: July 4, 2023
    Assignee: JTEKT CORPORATION
    Inventors: Yoshio Kondo, Toshiaki Ogata, Fumio Kishida, Keishi Nakamura, Hirohide Suzuki
  • Patent number: 11691664
    Abstract: A vehicle steering device includes an electric motor applying a steering force to a vehicle turning mechanism, a first setting portion setting a target assist torque in accordance with a steering torque, a second setting portion setting an angle controlling target torque for bringing an angular deviation between a target steering angle and an actual steering angle close to zero, a restriction processing portion restricting the angle controlling target torque set by the second setting portion, a first calculating portion calculating a target automatic steering torque using the angle controlling target torque after the restriction process by the restriction processing portion, and second calculating portions performing weighted addition of the target automatic steering torque and the target assist torque in accordance with a value that changes in accordance with a driver input to calculate a target motor torque that is a electric motor target motor torque value.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: July 4, 2023
    Assignee: JTEKT CORPORATION
    Inventors: Maxime Moreillon, Tsutomu Tamura, Robert Fuchs, Tomohiro Nakade
  • Patent number: 11691663
    Abstract: A steering control device controls a steering device that includes an electric motor. The steering control device includes a control unit configured to control an operation of the steering device by controlling the electric motor. The control unit is configured to calculate a control value for controlling the electric motor, to calculate a predetermined component indicating characteristics of the steering device using a value of a variable associated with the control value as an input, and to determine whether a mechanical abnormality has occurred in the steering device based on the calculated predetermined component.
    Type: Grant
    Filed: March 1, 2021
    Date of Patent: July 4, 2023
    Assignee: JTEKT CORPORATION
    Inventor: Takashi Kodera
  • Patent number: 11685428
    Abstract: A steering control device includes a control circuit and a drive circuit. The control circuit is configured to perform a current feedback computation by which the actual current value of electric current to be supplied to a motor follows a current command value. The control circuit is configured to execute an end-abutting relaxation control to correct the current command value such that decrease in an end interval angle is restricted, when the end interval angle is equal to or smaller than a predetermined angle, the end interval angle indicating the distance of the absolute steer angle from the end position correspondence angle. The control circuit is configured to adjust a control gain to be used in the current feedback computation, such that the control gain increases, when overshoot of the actual current value occurs during the execution of the end-abutting relaxation control.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: June 27, 2023
    Assignee: JTEKT CORPORATION
    Inventors: Nobuaki Kataoka, Takahiro Toko, Takafumi Yamaguchi, Yukinobu Ezaki