Patents Assigned to JTEKT
  • Patent number: 12128964
    Abstract: A control device for a vehicle includes a plurality of control circuits configured to control a control object in cooperation or in combination by starting with powering-on of a vehicle as a trigger. Each of the plurality of control circuits is configured to perform a synchronization process and power latch control. Each of the plurality of control circuits is configured to maintain the operation mode immediately before the vehicle has been powered off in a period in which the power latch control is being performed. Each of the plurality of control circuits is configured not to perform the synchronization process in a predetermined period when the vehicle has been powered on.
    Type: Grant
    Filed: October 14, 2022
    Date of Patent: October 29, 2024
    Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Kazuma Hasegawa, Yuji Fujita, Yugo Nagashima, Masaharu Yamashita, Shintaro Takayama, Yosuke Yamashita, Hiroki Tomizawa, Nobuyori Nakajima
  • Patent number: 12128969
    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: Grant
    Filed: August 25, 2021
    Date of Patent: October 29, 2024
    Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuuta Kajisawa, Fumihiko Sato, Masaharu Yamashita, Atsushi Satou, Masataka Okuda, Toshiyuki Mikida, Hiroaki Hanzawa
  • Patent number: 12128968
    Abstract: A method for controlling a steering system of a motor vehicle, including two channels arranged in parallel and each including an electric drive delivering an assistive force for assisting in the steering of the vehicle, so as to obtain a sum of the two delivered assistive forces that corresponds to a total requested assistive force requirement, this method being noteworthy in that a first channel delivers a first portion of the total assistive force requirement, and in that the second channel delivers a variable complementary assistive force portion, corresponding to the difference between the estimated or measured first force portion that is actually delivered and the total force requirement.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: October 29, 2024
    Assignee: JTEKT EUROPE
    Inventors: Stéphane Cassar, Bruno Collerais, Giovanni Dallara
  • Patent number: 12122462
    Abstract: A vehicle steering system includes a rack shaft, a pinion shaft, a housing including a rack shaft receiving portion and a pinion shaft receiving portion, and a cover member disposed above the pinion shaft receiving portion. A part of the pinion shaft projects upward from an upper end opening of the pinion shaft receiving portion. The cover member includes a hood portion and an annular side wall portion. The pinion shaft is inserted through the hood portion. The side wall portion includes a valve portion capable of coming into abutment with an outer circumferential surface of the pinion shaft receiving portion.
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: October 22, 2024
    Assignee: JTEKT CORPORATION
    Inventor: Yoshio Nakada
  • Publication number: 20240341270
    Abstract: A management system for an experimental animal is provided. This management system includes an information identifying unit configured to identify experimental information on the experimental animal to be transported to an experiment site, and a stress value calculating unit configured to calculate a stress value indicating stress to be suffered by the experimental animal during transportation based on the experimental information. The experimental information includes at least a part of a transportation distance for the transportation of the experimental animal, a transportation period for the transportation of the experimental animal, the number of the experimental animals to be transported at a time, an age of the experimental animal, and information on pretreatment given to the experimental animal prior to the transportation.
    Type: Application
    Filed: August 20, 2021
    Publication date: October 17, 2024
    Applicants: JTEKT CORPORATION, TOKUSHIMA UNIVERSITY
    Inventors: Masayuki TAKESHIMA, Yoshiyuki SHIBATA, Toshimasa SOKU, Kazuya NUMAZAKI, Fumiki MORIMATSU, Kentaroh TAKAGAKI, Maki HIRATA
  • Patent number: 12116052
    Abstract: Control calculation units of a back system in each actuator operate by a collaborative drive mode in which a torque is output to a motor drive unit by using an information transmitted and received mutually by a communication between the systems in common. Cooperative control calculation units in a reaction force actuator and a turning actuator can operate in cooperation with each other based on the information transmitted and received mutually by a communication between actuators. A communication between adjacent systems and a communication between adjacent actuators are restored, when a focus control calculation unit is restored, after the focus control calculation unit is stopped during operation and at least one of the communication between adjacent systems or the communication between adjacent actuators is interrupted.
    Type: Grant
    Filed: May 5, 2022
    Date of Patent: October 15, 2024
    Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATION
    Inventors: Akira Takesaki, Hisashi Kameya, Hiroki Tomizawa, Masaharu Yamashita, Kenji Shibata, Yosuke Yamashita, Shintaro Takayama, Toshihiro Takahashi, Yuji Fujita, Kenichi Abe, Yugo Nagashima
  • Patent number: 12116063
    Abstract: A steer-by-wire steering system for a vehicle, including: an operating member operable by a driver; a steering device including an electric motor and configured to steer a wheel by a force generated by the electric motor; a controller configured to control the steering device, wherein the controller enables the wheel to be steered in accordance with an operation of the operating member while imposing limitation on a supply current to the electric motor, and wherein the limitation imposed on the supply current is made smaller when a running speed of the vehicle is lower than a set speed and a steering motion of the wheel is a motion in a direction to decrease a steering amount than i) when the running speed of the vehicle is not lower than the set speed and ii) when the steering motion of the wheel is a motion in a direction to increase the steering amount.
    Type: Grant
    Filed: April 5, 2022
    Date of Patent: October 15, 2024
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATION, DENSO CORPORATION
    Inventors: Masaharu Yamashita, Masataka Okuda, Yosuke Yamashita, Yuji Fujita, Yuuta Kajisawa, Kenichi Abe, Hiroki Tomizawa, Nobuyori Nakajima
  • Publication number: 20240335877
    Abstract: A composite processing machine includes: a holding portion capable of holding a workpiece; a removal processing portion that performs removal processing on the workpiece held by the holding portion, the removal processing portion being capable of performing removal processing of a hard material; an additive manufacturing portion that applies the hard material to a surface of the workpiece held by the holding portion by melting the hard material while supplying the hard material to the surface; and a control unit that controls the composite processing machine. The control unit is configured to: control the additive manufacturing portion to form an additive portion made of the hard material on the surface of the workpiece held by the holding portion; and control the removal processing portion to perform the removal processing on the additive portion formed on the workpiece held by the holding portion.
    Type: Application
    Filed: September 6, 2021
    Publication date: October 10, 2024
    Applicant: JTEKT CORPORATION
    Inventors: Makoto TANO, Takaya NAGAHAMA, Keisuke USUDA, Koichi SHIIBA, Kohei KATO, Masato ITO
  • Publication number: 20240327742
    Abstract: A grease composition includes a base oil and a thickener. The thickener contains a urea compound and a styrene-based polymer. A content of the styrene-based polymer is 2% by mass or more and 30% by mass or less as to a total amount of the urea compound and the styrene-based polymer. In the thickener, an average value of diameter of particles with a diameter of 0.2 ?m or more is 0.2 ?m or more and 1.0 ?m or less.
    Type: Application
    Filed: June 29, 2022
    Publication date: October 3, 2024
    Applicant: JTEKT CORPORATION
    Inventors: Kanako TAKAHARA NIIYA, Junya MATSUYAMA
  • Patent number: 12103617
    Abstract: A vehicle control system controls a steer-by-wire type vehicle. The vehicle control system executes: reaction force control that applies a steering reaction force to a steering wheel; and driving assist control that assists driving of the vehicle. The reaction force control includes road information transmission control that applies a steering reaction force component corresponding to an oscillation caused by road surface unevenness to the steering wheel. The vehicle control system deactivates the road information transmission control when a deactivation condition is satisfied. The deactivation condition is that the driving assist control is in operation and a steering parameter reflecting a driver's steering intention is less than a threshold. As another example, the deactivation condition is that the driving assist control that vibrates the steering wheel for notifying the driver of a possibility of a lane departure is in operation.
    Type: Grant
    Filed: March 31, 2022
    Date of Patent: October 1, 2024
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATION
    Inventors: Kosuke Akatsuka, Yoshio Kudo, Isao Namikawa, Takashi Kodera, Koji Anraku, Junya Miyake
  • Publication number: 20240322208
    Abstract: A fuel cell system includes a fuel cell, an electric power recovery device, and a control device that controls the fuel cell and the electric power recovery device. In a state where supplying of the liquid fuel to the fuel cell is stopped, the control device charges post-stop electric power generated by the fuel cell using the liquid fuel that has been already supplied, thereby recovering the post-stop electric power into the electric power recovery device, and thereafter stopping an electrode reaction in an electrode structure of the fuel cell.
    Type: Application
    Filed: January 7, 2022
    Publication date: September 26, 2024
    Applicants: JTEKT CORPORATION, NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITY
    Inventors: Takuya TSUJIGUCHI, Motoo NAKAI, Toshiyuki SAITO, Atsushi KUBO, Yasuhide TAKEDA, Mototake FURUHASHI, Tatsuma KOUCHI, Ayumi NAKASONE, Atsushi NAKANE
  • Patent number: 12097917
    Abstract: A steering control device is configured to control a steering device as a controlled object, the steering device having a structure in which transmission of power between a steering portion and a turning portion is cut off. The steering control device includes a central processing unit. The central processing unit is configured to execute a reduction process in a case where at least either one of a travel state amount and a steering state amount is a state amount indicating that a target turning-corresponding angle does not change. The reduction process is a process of reducing a driving current to be supplied to a turning motor.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: September 24, 2024
    Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Junya Miyake, Takashi Kodera, Toru Takashima, Hidetsugu Toyama
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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