Patents Assigned to JTEKT
  • Vehicle control system and vehicle control method
    Patent number: 12097916
    Abstract: A vehicle control system controls a vehicle of a steer-by-wire type. The vehicle control system is configured to execute: driving assist control that assists driving of the vehicle; and conjunction reaction force control that applies a steering reaction force component to a steering wheel in conjunction with turning of the vehicle caused by the driving assist control. A driving assist direction is a direction of the turning of the vehicle caused by the driving assist control. The conjunction reaction force control includes feedforward reaction force control that moves the steering wheel in a same direction as the driving assist direction without depending on a steering angle of the steering wheel.
    Type: Grant
    Filed: April 29, 2022
    Date of Patent: September 24, 2024
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATION
    Inventors: Kosuke Akatsuka, Yoshio Kudo, Koji Anraku
  • MOTOR CONTROL DEVICE FOR STEER-BY-WIRE STEERING DEVICE
    Publication number: 20240308574
    Abstract: In a motor control device for a steer-by-wire steering device, the motor control device having a redundant system consisting of two systems, a first turning current command value is calculated in a first system, and a second turning current command value is calculated in a second system. A third processor outputs the first turning current command value when the two current command values are not divergent and outputs the second turning current command value when the two current command values are divergent. When a determination of a rapid steering operation is made, the third processor outputs the first turning current command value regardless of whether or not the two current command values are divergent.
    Type: Application
    Filed: March 12, 2024
    Publication date: September 19, 2024
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATION, DENSO CORPORATION
    Inventors: Kenji Shibata, Koichi Nishimura, Takahito Ishino, Ryo Yamazaki, Hiroyasu Inoue, Isao Namikawa, Nobuyori Nakajima, Hiroki Tomizawa, Takuya Maegawa
  • Motor control device with layout to decrease difference in current paths
    Patent number: 12095337
    Abstract: A motor control device includes a board that is provided at an end of a motor including winding groups of two systems and controls supply of electric power to the winding group independently for each system. The board includes two areas that are partitioned by a boundary line passing through the center of the motor when viewed in an axial direction of the motor. A power supply terminal connector, an inverter circuit, and a motor terminal connector are sequentially arranged along the boundary line when viewed in the axial direction of the motor. The motor terminal connector is provided such that a straight line perpendicular to a direction in which motor terminals are arranged and the boundary line form an acute angle.
    Type: Grant
    Filed: February 7, 2022
    Date of Patent: September 17, 2024
    Assignee: JTEKT CORPORATION
    Inventors: Yuto Sato, Yusuke Natsume
  • Assist device
    Patent number: 12090653
    Abstract: An assist device includes a first harness, a second harness, a belt body, an actuator and a controller. The controller is configured to perform operation control of the actuator. The controller is configured to, upon operation of the actuator being started in a state in which the first harness and the second harness is fitted to the user, perform winding of the belt body with a first winding force, and is configured to, upon the winding of the belt body being completed, change the winding force of the actuator to a second winding force that is smaller than the first winding force.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: September 17, 2024
    Assignee: JTEKT CORPORATION
    Inventors: Yoshitaka Yoshimi, Kazuyoshi Ohtsubo, Tomoki Arai, Hiromichi Ohta
  • STEERING DEVICE
    Publication number: 20240286670
    Abstract: A steering device includes a cylindrical support tube that rotatably supports a steering shaft, a speed reducer configured to apply a torque to the steering shaft, and a housing that includes a cylindrical portion housing the speed reducer. A flange of the support tube and the cylindrical portion are disposed coaxially and coupled to each other with a bolt. A bearing support member is fitted to an inner peripheral surface of the cylindrical portion. The steering shaft extends through the bearing support member. A bearing is disposed between an outer peripheral surface of the steering shaft and an inner peripheral surface of the bearing support member. The bearing support member includes a deformation allowing portion configured to allow elastic deformation of the bearing support member in a radial direction.
    Type: Application
    Filed: February 9, 2022
    Publication date: August 29, 2024
    Applicants: JTEKT CORPORATION, JTEKT COLUMN SYSTEMS CORPORATION
    Inventors: Hiroaki SUZUKI, Naofumi KAWAMURA, Tetsuya EBISU, Yuki FUJIOKA, Tomonori SUGIURA, Kosuke ITO, Takahiro BAITO, Takao NAKAAKI, Yoshiaki MURAKAMI, Kazuhisa ASAKAWA
  • STEERING COLUMN DEVICE
    Publication number: 20240286667
    Abstract: A steering column device includes a lower tube that is attached to a vehicle body so as to be pivotable in an up-down direction, a column shaft to which a steering wheel is attached, an upper tube that rotatably supports the column shaft and that also is attached to the lower tube so as to be movable in a front-rear direction, a motor for generating motor torque, a link mechanism that couples the lower tube and the upper tube so as to be capable of moving in conjunction, and a power transmission mechanism that acts to transmit the motor torque to the link mechanism. The link mechanism causes the pivoting of the lower tube in the up-down direction and the movement of the upper tube in the front-rear direction to be performed in conjunction, when the motor torque is transmitted to the link mechanism by the power transmission mechanism.
    Type: Application
    Filed: June 25, 2021
    Publication date: August 29, 2024
    Applicants: JTEKT CORPORATION, JTEKT COLUMN SYSTEMS CORPORATION
    Inventors: Naofumi KAWAMURA, Hiroaki SUZUKI, Tetsuya EBISU, Yuki FUJIOKA, Tomonori SUGIURA, Kosuke ITO, Takahiro BAITO, Takao NAKAAKI, Yoshiaki MURAKAMI, Kazuhisa ASAKAWA
  • STEER-BY-WIRE STEERING APPARATUS
    Publication number: 20240286673
    Abstract: A reaction force actuator applies, during normal operation, a steering reaction force, which rapidly increases upon approaching an upper limit of a virtual steering range, to a steering wheel. During rapid steering in which a turning angle velocity is greater than or equal to a predetermined value and a turning follow delay is greater than or equal to a predetermined value, the reaction force actuator applies a steering reaction force to the steering wheel based on an upper limit corresponding to a narrower virtual steering range.
    Type: Application
    Filed: February 23, 2024
    Publication date: August 29, 2024
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATION
    Inventors: Hajime KAMIMAE, Yoshio KUDO, Tomoyuki IIDA, Yuko GOTO, Takahito ISHINO, Atsushi ISHIHARA, Junya MIYAKE
  • STEERING DEVICE
    Publication number: 20240286665
    Abstract: A steering system includes a support tube including a flange and a housing including a cylindrical portion housing a speed reducer. The support tube includes a column bracket attached to a vehicle body. The housing is supported by a support shaft in such a manner that the housing can rotate with respect to the vehicle body. The flange and the cylindrical portion are connected to each other by bolts. The flange has insertion holes into which the bolts are inserted. Clearance that allows relative rotation between the flange and the cylindrical portion is present between the outer peripheral surface of the bolt and the inner peripheral surface of the insertion hole of the flange. An elastic body that reduces the relative rotation between the flange and the cylindrical portion is interposed in a compressed state between the bolt and the flange.
    Type: Application
    Filed: June 25, 2021
    Publication date: August 29, 2024
    Applicants: JTEKT CORPORATION, JTEKT COLUMN SYSTEMS CORPORATION
    Inventors: Naofumi KAWAMURA, Hiroaki SUZUKI, Tetsuya EBISU, Yuki FUJIOKA, Tomonori SUGIURA, Kosuke ITO, Takahiro BAITO, Takao NAKAAKI, Yoshiaki MURAKAMI, Kazuhisa ASAKAWA
  • STEERING DEVICE
    Publication number: 20240286666
    Abstract: A steering device includes a cylindrical support tube, a speed reducer, and a housing. The support tube includes a flange, and supports a steering shaft such that the steering shaft is rotatable. The speed reducer applies torque to the steering shaft. The housing includes a cylindrical portion that houses the speed reducer. The flange and the cylindrical portion are disposed coaxially, and coupled to each other by a bolt. The flange and the cylindrical portion include an engagement portion, at which the flange and the cylindrical portion are engaged with each other in a radial direction of the flange, at a different location from a location at which the bolt is provided.
    Type: Application
    Filed: June 25, 2021
    Publication date: August 29, 2024
    Applicants: JTEKT CORPORATION, JTEKT COLUMN SYSTEMS CORPORATION
    Inventors: Naofumi KAWAMURA, Hiroaki SUZUKI, Tetsuya EBISU, Yuki FUJIOKA, Tomonori SUGIURA, Kosuke ITO, Takahiro BAITO, Takao NAKAAKI, Yoshiaki MURAKAMI, Kazuhisa ASAKAWA
  • MOTOR CONTROL DEVICE
    Publication number: 20240278650
    Abstract: A motor control unit includes: an assist torque command value generation unit that generates an assist torque command value using steering torque; a manual steering command value generation unit that generates a manual steering command value using the steering torque and the assist torque command value; an integrated angle command value calculation unit that calculates an integrated angle command value by adding the manual steering command value to an automatic steering command value; and a switching unit that switches between a first control for controlling an electric motor based on the assist torque command value and a second control for controlling the electric motor based on the integrated angle command value, based on a switching signal.
    Type: Application
    Filed: June 28, 2022
    Publication date: August 22, 2024
    Applicant: JTEKT CORPORATION
    Inventors: Naoki SHOJI, Mitsuko YOSHIDA, Robert FUCHS
  • GEAR AND STEERING DEVICE
    Publication number: 20240271689
    Abstract: A gear includes an annular sleeve and a tooth portion provided by injection molding to cover a part of the sleeve. The sleeve is a stacked body including a plurality of annular steel plates stacked in an axial direction of the sleeve.
    Type: Application
    Filed: March 10, 2022
    Publication date: August 15, 2024
    Applicants: JTEKT CORPORATION, JTEKT COLUMN SYSTEMS CORPORATION
    Inventors: Naofumi KAWAMURA, Hiroaki SUZUKI, Tetsuya EBISU, Yuki FUJIOKA, Tomonori SUGIURA, Kosuke ITO, Yasuhiro TANIOKA, Masayoshi SAKUDA, Takahiro BAITO, Takao NAKAAKI, Yoshiaki MURAKAMI, Takashi YAMAGUCHI, Kazuhisa ASAKAWA
  • MOTOR UNIT AND VEHICLE STEERING DEVICE
    Publication number: 20240275233
    Abstract: A motor attaching structure, a motor unit, and a vehicle steering device, capable of suppressing vibrations generated by a motor from being conveyed to an attachment-receiving object, while maintaining support rigidity regarding the motor by attaching a motor case to an attachment-receiving object by a fastening member. A motor case of a motor, in which a stator and a rotor are housed in the motor case, is attached by bolts to a housing serving as an attachment-receiving object. The motor case has a cylindrical portion that houses the stator, and a bottom portion that is provided so as to protrude toward an inner side in a radial direction from one end portion of the cylindrical portion. A fastening portion for receiving the bolt is provided on the bottom portion on an inner side of an outer peripheral face of the cylindrical portion.
    Type: Application
    Filed: November 10, 2021
    Publication date: August 15, 2024
    Applicant: JTEKT CORPORATION
    Inventors: Yusuke NATSUME, Nobuyasu SAJI, Kosuke TSUKAHARA, Kenichi FUKUNAGA, Takaya TANIKAWA
  • Road surface friction coefficient estimating device
    Patent number: 12061144
    Abstract: A road surface friction coefficient estimating device includes an electronic control unit. The electronic control unit is configured to: compute a system noise variance value as an index indicating a degree of variation in a road surface friction coefficient estimation value; compute an observation noise variance value as an index indicating a degree of variation in observation noise; compute, with regard to an observation deviation, an index indicating a degree of shift of the observation deviation that is newly obtained as to an index indicating a degree of past variation in the observation deviation; compute the index as a friction coefficient change amount; compute a Kalman gain; and add in the friction coefficient change amount when computing the system noise variance value.
    Type: Grant
    Filed: March 17, 2021
    Date of Patent: August 13, 2024
    Assignee: JTEKT CORPORATION
    Inventor: Hiroyasu Toba
  • Method for estimating a value of a friction force exerted on a part of a power steering system by means of a mathematical model
    Patent number: 12060119
    Abstract: A method for estimating a value of a friction force exerted on a part of a power steering system of a vehicle, the part of the power steering system including at least one motor exerting a motor torque, the value of the friction force making it possible to modify the motor torque, by means of a mathematical model.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: August 13, 2024
    Assignee: JTEKT EUROPE
    Inventors: Serge Gaudin, Nicolas Baudouin, Pascal Moulaire
  • ELECTRIC WHEELCHAIR
    Publication number: 20240261161
    Abstract: An electric wheelchair includes: a vehicle body; a first drive wheel; a second drive wheel; a first motor; a second motor; a first grip; a second grip; a first operation detection unit configured to detect a position of the first grip in a front-rear direction; a second operation detection unit configured to detect a position of the second grip in the front-rear direction; a first rotation speed detection unit; a second rotation speed detection unit; and a controller. The controller is configured to control the first motor and the second motor so as to turn the vehicle body, based on a difference between a displacement amount of the first grip and a displacement amount of the second grip and a difference between a rotation speed of the first drive wheel and a rotation speed of the second drive wheel.
    Type: Application
    Filed: January 30, 2024
    Publication date: August 8, 2024
    Applicant: JTEKT CORPORATION
    Inventors: Nobuyuki TOGASHI, Hiroshi KITAMOTO, Nobuaki IKEHARA, Riku NAGAYAMA, Chishin YOHENA
  • Method for the control of a power steering system, comprising a first drive and a second drive and implementing an evaluation and regulation step
    Patent number: 12054205
    Abstract: A method for the control of a power steering system includes a first drive and a second drive which are arranged in parallel and implement an evaluation and regulation step calculating the first compensation request and the second compensation request as a function of the first deviation and of the second deviation.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: August 6, 2024
    Assignee: JTEKT EUROPE
    Inventors: Guillaume Carpentier, Bertrand Perret
  • Abnormality detection device
    Patent number: 12054192
    Abstract: An abnormality detection device includes a processing circuit configured to perform an abnormality detecting process. The abnormality detecting process includes a first state quantity acquiring process, a second state quantity acquiring process, a difference calculating process of calculating a difference between a first state quantity and a second state quantity, and a determination process of comparing an absolute value of the difference with a difference threshold value. The abnormality detecting process is a process of detecting an abnormality of a turning unit when the absolute value of the difference is greater than the difference threshold value, and the processing circuit is configured not to perform the determination process when an absolute value of an actual current value is greater than a current threshold value.
    Type: Grant
    Filed: November 15, 2021
    Date of Patent: August 6, 2024
    Assignee: JTEKT CORPORATION
    Inventors: Koji Anraku, Isao Namikawa, Takuji Yoshida
  • SAFETY VALVE AND DISCHARGE DIRECTION REGULATION MEMBER
    Publication number: 20240255064
    Abstract: To provide a safety valve capable of suppressing creep of a fusible alloy to the minimum even if a member that blocks a flow path directly presses the fusible alloy. A fusible alloy is disposed between a blocking member that blocks the flow of fluid flowing from a discharge path of a fluid apparatus and a pressing cap, a reservoir part 8 that reserves the fused fusible alloy is formed at least in one of the blocking member 3 and the pressing cap, and two porous plates punched positions of which do not overlap with each other are arranged between the reservoir part and the fusible alloy.
    Type: Application
    Filed: July 29, 2021
    Publication date: August 1, 2024
    Applicants: FUJIKIN INCORPORATED, JTEKT CORPORATION
    Inventors: Masashi Matsuoka, Kunihiko Daido, Tadayuki Yakushijin, Koji Hiramatsu, Yusei Horikawa, Takao Kitanaka, Kazushi Numazaki, Natsuki Iwamoto, Tetsuya Tokuno
  • Steer-by-wire steering system
    Patent number: 12049262
    Abstract: A steer-by-wire steering system, including a steering device including a dual-system steering motor including a main system and a sub system, wherein a power supply to the main system is conducted selectively by a main power source and a backup power source, and a power supply to the sub system is conducted by only the main power source, wherein, in a normal power-supply situation in which the power supply to the main system and to the sub system is conducted by the main power source, a controller controls the sub system to operate in accordance with the main system, and wherein, in a backup power-supply situation in which the power supply to the main system is conducted by the backup power source, the controller controls the main system not to operate or to operate while limiting the power supply to the main system and controls the sub system independently.
    Type: Grant
    Filed: June 29, 2022
    Date of Patent: July 30, 2024
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATION
    Inventors: Atsushi Satou, Yosuke Yamashita, Masaharu Yamashita, Toshihiro Takahashi, Tokuaki Hibino, Yuji Fujita, Yugo Nagashima, Kazuma Hasegawa, Yuuta Kajisawa, Kenichi Abe
  • Wheelchair
    Patent number: D1042244
    Type: Grant
    Filed: April 27, 2022
    Date of Patent: September 17, 2024
    Assignee: JTEKT CORPORATION
    Inventors: Hiroshi Kitamoto, Akihiro Takeuchi, Riku Nagayama, Chishin Yohena, Toshiki Kumeno, Nobuaki Ikehara, Nobuyuki Togashi, Goro Tsuji