Patents Assigned to JTEKT
  • CONTROL DEVICE
    Publication number: 20220077802
    Abstract: A control device controls a motor which includes a first stator coil and a second stator coil insulated from each other. The control device includes: a first drive circuit that is connected to the first stator coil; a second drive circuit that is connected to the second stator coil; a first processing circuit; and a second processing circuit. The first processing circuit increases an output of an integral element according to the number of control systems when the second processing circuit performs a process of switching a first use and operation process to a second use and operation process.
    Type: Application
    Filed: August 31, 2021
    Publication date: March 10, 2022
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Shingo NITTA, Takahiro TOKO, Takahiro KOJO, Hisaya AKATSUKA
  • Driver torque estimation apparatus and steering system including the same
    Patent number: 11267506
    Abstract: An electric power steering system includes a second shaft coupled to a first shaft via a torsion bar, a basic driver torque estimation unit (extended state observer) configured to estimate a basic driver torque by using a disturbance observer based on a torsion bar torque and a rotation angle of the second shaft, a gravity torque calculation unit configured to calculate, by using a rotation angle of a steering wheel, a gravity torque applied to the first shaft by gravity acting on the center of gravity of the steering wheel, and a driver torque estimation unit configured to estimate a driver torque by using the basic driver torque estimated by the basic driver torque estimation unit and the gravity torque calculated by the gravity torque calculation unit.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: March 8, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Maxime Moreillon, Tsutomu Tamura, Robert Fuchs, Naoki Shoji
  • Rolling slide member, rolling bearing using same, and method for manufacturing rolling slide member
    Patent number: 11268572
    Abstract: A rolling-sliding member that is high in hardness and continues to have a passivation film reliably even after being subjected to a process that does not require any processing for removal of scale, etc., as well as a rolling bearing using the same and a method for manufacturing the rolling-sliding member.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: March 8, 2022
    Assignees: JTEKT CORPORATION, DAIDO STEEL CO., LTD.
    Inventors: Nao Inazaki, Fumihiro Furukawa, Kanji Kawasaki, Hisato Nishisaka, Tomoya Hattori, Kazuhisa Kitamura, Yusuke Kusafuka, Keita Hinoshita, Hiroyuki Takabayashi, Kazuhisa Ishida
  • STEERING CONTROL DEVICE
    Publication number: 20220063711
    Abstract: A steering control device is configured to control a steering system including a turning mechanism that includes a motor configured to generate a motor torque that serves as power for moving a turning shaft to turn turning wheels of a vehicle. The steering control device includes a control unit configured to control a target control value serving as a target of a control value for controlling the motor torque of the motor. The control unit is configured to perform compensation for the target control value; acquire an offset value; and change the target control value such that the acquired offset value decreases gradually.
    Type: Application
    Filed: August 23, 2021
    Publication date: March 3, 2022
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yusuke OTSUKA, Takashi KODERA, Toru TAKASHIMA
  • STEERING SYSTEM
    Publication number: 20220063713
    Abstract: A steering system includes a control unit. The control unit includes a manual steering angle command value setting unit, a first weighting unit, a reaction combined angle command value calculating unit, a turning combined angle command value calculating unit, a reaction force control unit configured to cause a rotation angle of a reaction motor to conform to a reaction combined angle command value, and a turning angle control unit configured to cause a rotation angle of a turning motor to conform to a turning combined angle command value.
    Type: Application
    Filed: August 26, 2021
    Publication date: March 3, 2022
    Applicant: JTEKT CORPORATION
    Inventors: Naoki SHOJI, Tomohiro NAKADE, Robert FUCHS
  • ELECTRIC POWER SOURCE DEVICE
    Publication number: 20220063712
    Abstract: An electric power source device includes an auxiliary electric power source for a main electric power source that supplies electric power to electric power supply targets, including an electric circuit of a control system for controlling a specific control target and an electric circuit of a power system that requires larger electric power than the electric circuit of the control system; and a selection circuit configured to supply the electric power from one electric power source having a higher voltage, out of the main electric power source and the auxiliary electric power source, to at least the electric circuit of the control system among the electric power supply targets.
    Type: Application
    Filed: August 25, 2021
    Publication date: March 3, 2022
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuuta KAJISAWA, Fumihiko SATO, Masaharu YAMASHITA, Atsushi SATOU, Masataka OKUDA, Toshiyuki MIKIDA, Hiroaki HANZAWA
  • Constant velocity joint
    Patent number: 11261918
    Abstract: In a constant velocity joint, a center locus of a first ball rolling on a first outer central portion is inclined such that a distance from a central axis of an outer joint member decreases toward a bottom side of the outer joint member. A center locus of a second ball rolling on a second outer central portion is formed in a linear shape and inclined such that a distance from the central axis of the outer joint member increases toward the bottom side of the outer joint member. A center locus of the second ball rolling on the second outer bottom side portion is formed in an arc shape and disposed in the outer joint member at a position radially inwardly from a tangent at a connecting position between the second outer central portion and the second outer bottom side portion.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: March 1, 2022
    Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Isashi Kashiwagi, Masahito Ikeo, Yoshitaka Shinoda, Hideki Sugiura
  • Rolling bearing and cage
    Patent number: 11255381
    Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of rolling elements, and a cage. The cage includes an annular body, a plurality of cage prongs, and guide portions placed inward of the cage prongs in the radial direction of the cage such that the guide portions extend from a radially inner part of the annular body toward a second side in the axial direction of the cage, the guide portions being configured to position the cage by making contact with an inner ring raceway. The cage has a groove so as to connect pockets adjacent to each other in the circumferential direction, the groove being configured such that lubricant is present in the groove and a groove width of the groove is increased in the radial direction in the center of the groove in the circumferential direction.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: February 22, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Shota Akimoto, Yuya Yamamoto, Masayuki Murakami
  • METHOD FOR ACQUIRING CONTACT ANGLE OF ANGULAR CONTACT BALL BEARING AND METHOD FOR MANUFACTURING WHEEL BEARING DEVICE
    Publication number: 20220049955
    Abstract: A method for acquiring a contact angle of an angular contact ball bearing includes: a first detection step of detecting a number of rotation of a first bearing ring of an angular contact ball bearing; a second detection step of externally detecting deformation of a second bearing ring associated with orbital rotation of a ball of the angular contact ball bearing; and a calculation step of obtaining a contact angle ? of the ball using a detection result of the first detection step, a detection result of the second detection step, and specification data pertaining to the ball.
    Type: Application
    Filed: March 17, 2020
    Publication date: February 17, 2022
    Applicant: JTEKT CORPORATION
    Inventors: Liming LOU, Yuuki TAKEDA, Naoki SAWADA, Kei SUMIMOTO
  • MONITORING DEVICE, SOUND COLLECTING DEVICE, AND MONITORING METHOD OF MONITORING DEVICE
    Publication number: 20220053265
    Abstract: A monitoring device that monitors a target area includes: a sound collecting device in which a plurality of microphones that converts sound waves emitted from the target area to a sound pressure signal is arranged; and an information processing device configured to detect an abnormality in the target area based on the sound pressure signal. The sound pressure signal is a signal of sound waves with a frequency of 20 kHz or higher.
    Type: Application
    Filed: July 29, 2021
    Publication date: February 17, 2022
    Applicant: JTEKT CORPORATION
    Inventors: Boyko STOIMENOV, Mikio NOZAKI
  • Constant velocity joint
    Patent number: 11248660
    Abstract: A joint-center-fixed constant velocity joint configured to be provided in a vehicle includes an outer joint member, an inner joint member, a first ball, a second ball, and a cage. While a center of the first ball is moving to a position of the maximum use angle on an opening side from a joint center, a first open angle faces the opening side. While a center of the second ball is moving to a position of the maximum use angle on a bottom side from the joint center, a second open angle is not reversed from a state where the second open angle faces the bottom side to a state where the second open angle faces the opening side.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: February 15, 2022
    Assignees: JTEKT Corporation, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Isashi Kashiwagi, Masahito Ikeo, Yoshitaka Shinoda, Hideki Sugiura
  • Steering apparatus
    Patent number: 11247713
    Abstract: A steering apparatus for use in steering a vehicle includes: a movable body to which an input device is attached, the movable body configured to move back and forth in an extend-retract direction between a first position closer to the front of the vehicle and a second position closer to the driver; an intermediate guide that guides the movable body in the extend-retract direction, and moves back and forth in the extend-retract direction; a base guide that is attached to the vehicle and guides the intermediate guide in the extend-retract direction; a first extend-retract mechanism including an extend-retract drive source that causes the intermediate guide to move back and forth relative to the base guide; and a second extend-retract mechanism that causes the movable body to move back and forth relative to the intermediate guide by using driving force of the extend-retract drive source.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: February 15, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Yasuyuki Nozawa, Takeshi Watanabe, Norihiro Ochi, Ryoichi Tokioka, Kei Kitahara, Yousuke Nishimura
  • Driving force control apparatus, driving apparatus, and driving force transmission apparatus
    Patent number: 11247690
    Abstract: A driving force control apparatus for controlling a driving force to be transmitted to a wheel includes a processor. The processor is configured to set, when the wheel is idled, a control amount of the driving force to be transmitted to the wheel based on a vehicle acceleration.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: February 15, 2022
    Assignee: JTEKT Corporation
    Inventors: Tetsuya Yamazaki, Tomoaki Kato, Wataru Hirata, Toshihiko Yamamoto
  • Motor control device and motor control method
    Patent number: 11251732
    Abstract: A motor control device includes processing circuitry configured to calculate a current command value corresponding to torque that should be generated by a motor, divide the calculated current command value into individual current command values for coil groups, control power feeding to the coil groups independently for each of the coil groups based on a corresponding one of the individual current command values, set, for each one of the coil groups, an upper limit value of a corresponding one of the individual current command values and, when the individual current command value for any one of the coil groups is limited to a value that is smaller than a corresponding one of the upper limit values, supplement an amount limited in the individual current command value by increasing the individual current command value for at least a remaining one of the coil groups.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: February 15, 2022
    Assignees: JTEKT CORPORATION, JTEKT EUROPE S.A.S.
    Inventors: Hiroshi Kawamura, Yuji Fujita, Xavier Palandre, Tahar Slama
  • Cage and roller assembly
    Patent number: 11248656
    Abstract: A cage and roller assembly includes a plurality of rollers to be brought into rolling contact with a raceway surface provided on the outer periphery of a shaft, and an annular cage that retains the rollers. Lubricating oil is supplied through an oil supply hole that is provided inside the shaft and is open at the raceway surface. The cage includes a pair of annular portions, and a plurality of cage bars that couple the annular portions together and are arranged with intervals in a circumferential direction. The rollers are housed in pockets each formed between the pair of annular portions and between the cage bars that are adjacent to each other in the circumferential direction. The cage has an inner recessed groove that is provided on a radially inner surface of the cage bar and extends through the annular portions in an axial direction.
    Type: Grant
    Filed: July 28, 2020
    Date of Patent: February 15, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Junji Murata, Shigeo Kamamoto, Yuki Shishihara
  • DRIVING DEVICE
    Publication number: 20220045574
    Abstract: A driving device includes an electric motor, a drive gear, a deceleration mechanism, a driven gear, and a housing. At least either one of the drive gear and the driven gear is provided as a helical gear. The deceleration mechanism includes a plurality of reduction gear shafts, a plurality of bearings, and a biasing member provided for at least any one of the bearings. The biasing member axially biases an outer ring of the at least any one of the bearings that supports at least either one of end parts of the shaft portion of a corresponding one of the reduction gear shafts, the end parts including an end part on the large-diameter gear wheel side and an end part on the small-diameter gear wheel side.
    Type: Application
    Filed: July 26, 2021
    Publication date: February 10, 2022
    Applicant: JTEKT CORPORATION
    Inventors: Akitomo IWATA, Yoshinori SUZUKI, Keita NOMURA, Akira NAKASHIMA, Kuniko HAYASHI, Akira SATO, Yusei KONDA, Minh Phuong DAO, Yoshihide KAMIYA, Van Tinh NGUYEN
  • METHOD FOR DETERMINING A SETPOINT TORQUE ON THE BASIS OF A REVERSIBILITY FUNCTION CALCULATING A TARGET SPEED OF A STEERING WHEEL DEPENDING ON A STEERING WHEEL ANGLE AND A YAW RATE
    Publication number: 20220041208
    Abstract: A method for determining a setpoint torque for a steering wheel of a power-assisted steering system of a vehicle, the setpoint torque making it possible to determine a motor torque applied directly or indirectly by a control motor to the steering wheel, and the setpoint torque being at least determined by a reversibility function designed to bring a steering wheel angle of the steering wheel toward the steering wheel angle at which the vehicle will follow a trajectory in a straight line, the reversibility function comprising a first step in which a target speed of the steering wheel is determined depending on the steering wheel angle, wherein the target speed is also a function of a yaw rate of the vehicle.
    Type: Application
    Filed: October 1, 2019
    Publication date: February 10, 2022
    Applicant: JTEKT EUROPE
    Inventors: Pierre LARMINY, André MICHELIS, Pascal MOULAIRE, Christophe RAVIER
  • ASSIST DEVICE
    Publication number: 20220040025
    Abstract: An assist device includes a first body-worn unit, second body-worn units, an actuator, a detection part, a controller configured to obtain an assist parameter for causing the actuator to generate a desired assist force, and perform control for causing the actuator to operate at an output corresponding to the assist parameter. When the user performs a forward leaning action, the controller obtains the assist parameter for providing the user with the assist force in a direction of bringing the user to an upright standing posture based on the tilt angle and a time-based change in the tilt angle. The controller is configured to further perform an assistance moderation process to reduce the assist force when the time-based change in the tilt angle increases.
    Type: Application
    Filed: July 26, 2021
    Publication date: February 10, 2022
    Applicant: JTEKT CORPORATION
    Inventors: Yoshitaka YOSHIMI, Toshiki KUMENO
  • METHOD FOR DETERMINING A SETPOINT TORQUE FOR A STEERING WHEEL AS A FUNCTION OF A GAIN DEPENDENT ON A STEERING WHEEL TORQUE
    Publication number: 20220041211
    Abstract: A method for determining a setpoint torque for a steering wheel of an electric power steering system of a vehicle, the setpoint torque helping determine an engine torque applied directly or indirectly to the steering wheel, the setpoint torque being a function of at least one equivalent lateral acceleration having a dimension of an acceleration, wherein the equivalent lateral acceleration is weighted by a gain dependent on at least a steering wheel torque.
    Type: Application
    Filed: August 21, 2019
    Publication date: February 10, 2022
    Applicant: JTEKT EUROPE
    Inventors: André MICHELIS, Pascal MOULAIRE, Christophe RAVIER, Pierre LARMINY
  • Sensor capable of ensuring that a sensor housing has sufficient rigidity
    Patent number: 11243128
    Abstract: A sensor includes a permanent magnet mounted on a shaft, a magnetic yoke, a magnetism collecting ring, a circuit board, and a sensor housing through which the shaft is inserted. The sensor housing has a box-shaped accommodating chamber accommodating at least the circuit board via an opening that opens in a direction crossing an axial direction of the shaft. A reinforcing member connecting two wall surfaces of the accommodating chamber that face each other in the axial direction of the shaft is provided in the accommodating chamber.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: February 8, 2022
    Assignee: JTEKT CORPORATION
    Inventor: Yuichi Toyama