Patents Assigned to JTEKT
  • Publication number: 20210276616
    Abstract: A steering control apparatus controls a motor used to turn a steered wheel of a vehicle, which synchronizes with a steering wheel, based on a command value. The steering control apparatus includes an electronic control unit. The electronic control unit is configured to compute a feedback control torque to be reflected in the command value. The electronic control unit is configured to compute a disturbance torque based on the feedback control torque and a predetermined angle. The electronic control unit is configured to correct the feedback control torque by using the disturbance torque. The electronic control unit is configured to correct the command value reflecting the corrected feedback control torque, based on an applied torque.
    Type: Application
    Filed: March 3, 2021
    Publication date: September 9, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Yuki INDEN, Terutaka TAMAIZUMI
  • Publication number: 20210276610
    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: Application
    Filed: March 1, 2021
    Publication date: September 9, 2021
    Applicant: JTEKT CORPORATION
    Inventor: Takashi KODERA
  • Publication number: 20210275369
    Abstract: There is provided a walking support system for a combined training including: a walking assist device configured to move in accordance with an operation of a user to assist a walking of the user; a voice output unit configured to output a voice; and a task load unit configured to perform a voice-output for a task to the user via the voice output unit when the walking assist device is used by the user during the walking, the task being answerable by the voice.
    Type: Application
    Filed: March 1, 2021
    Publication date: September 9, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Yoshiyuki SHIBATA, Shinji TAKEUCHI, Yuki MATSUOKA, Manabu KANAYA
  • Publication number: 20210269086
    Abstract: A steering control apparatus is configured to control a steering system having a structure in which a power transmission path between a steering mechanism and a steering operation mechanism including a motor configured to generate a motor torque is separated. The steering control apparatus includes a controller configured to control driving of the motor. The controller detects an abnormality of the steering operation mechanism when a value indicating a variation in the motor torque is a value indicating a state in which a steering operation shaft is presumed to be immovable though the motor torque is applied.
    Type: Application
    Filed: February 22, 2021
    Publication date: September 2, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Koji ANRAKU, Isao NAMIKAWA, Takuji YOSHIDA, Masahide NITANO
  • Publication number: 20210262529
    Abstract: A shaft coupling includes a first coupling member, a second coupling member, and a cushioning member. The first coupling member includes first protrusions. The second coupling member includes second protrusions. The cushioning member includes a plurality of radiating portions. When the first coupling member and the second coupling member are arranged coaxially and the first coupling member and the second coupling member are in an unloaded state, predetermined paired facing surfaces have a minimum clearance angle present on a radially outer side with respect to a center of the radiating portion in a radiating direction. The predetermined paired facing surfaces are at least one of first paired facing surfaces and second paired facing surfaces.
    Type: Application
    Filed: February 5, 2021
    Publication date: August 26, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Naofumi KAWAMURA, Hideyuki HONKADO
  • Publication number: 20210261189
    Abstract: A method for controlling a steering system of a motor vehicle, including first and second channels in parallel, each including an electric power unit delivering an assist force to the steering system of the vehicle, in order to obtain the sum of two delivered assist forces, corresponding to the total assist force required, the method including: evaluating the channel having the lowest power unit power supply voltage value; defining a master channel function delivering an initial portion of the total assist force requirement and a slave channel function delivering a variable complementary portion of the assist force, corresponding to the difference between the initial portion of force actually delivered and the total force requirement; and pairing the master channel function with the channel having the lowest power unit power supply voltage value, and the slave channel function with the channel having the highest power unit power supply voltage value.
    Type: Application
    Filed: July 9, 2019
    Publication date: August 26, 2021
    Applicant: JTEKT EUROPE
    Inventors: Stéphane CASSAR, Bruno COLLERAIS, Giovanni DALLARA
  • Patent number: 11098812
    Abstract: A pressure reducing valve includes: a housing having an input port, an input channel connected to the input port, a pressure reducing chamber connected to the input channel, a delivery channel connected to the pressure reducing chamber, an output channel and an auxiliary channel branched off from the delivery channel, an output port connected to the output channel, and an auxiliary port connected to the auxiliary channel; and a valve mechanism which is provided inside the pressure reducing chamber connected to the delivery channel and of which the amount of opening is changed to regulate the pressure inside the pressure reducing chamber. Centerlines of the delivery channel, the output channel, and the auxiliary channel are arranged in the same plane.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: August 24, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Toshikatsu Kubo, Akira Nakano, Yuya Kihara, Yutaka Hotta, Akira Yamashita
  • Patent number: 11097769
    Abstract: A steering control device includes a control unit, and the control unit includes a target steering angle calculating unit configured to calculate a target steering angle based on a steering torque and is configured to calculate a target reaction torque based on execution of feedback control for causing the steering angle to match the target steering angle. The control unit includes a plurality of axial force calculating units configured to calculate a plurality of kinds of axial forces acting on a turning shaft based on different state quantities and a grip state quantity calculating unit configured to calculate a grip state quantity based on the plurality of kinds of axial forces. The target steering angle calculating unit is configured to calculate the target steering angle in consideration of the grip state quantity.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: August 24, 2021
    Assignee: JTEKT CORPORATION
    Inventor: Takashi Kodera
  • Publication number: 20210253155
    Abstract: A steering column device includes an inner tube, a housing, and a lock mechanism configured. The lock mechanism includes a first engagement member, a second engagement member, a first urging member, a second urging member, a cam member configured to rotate about a rotation axis extending in a direction in which the first urging member and the second urging member are arranged such that the second urging member serving as a follower is moved in the direction in which the first urging member and the second urging member are arranged to change a magnitude relationship between an urging force of the first urging member and an urging force of the second urging member, and an operation lever configured to operate the cam member.
    Type: Application
    Filed: February 9, 2021
    Publication date: August 19, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Susumu IMAGAKI, Masayoshi SAKUDA, Takahiro BAITO, Takuya ADACHI, Kota HIGUCHI, So TANAKA, Kazuki FUJIWARA, Kenji UTSUNOMIYA
  • Publication number: 20210253161
    Abstract: A motor controlling ECU includes an automatic steering controller that sets an automatic steering control amount, an assist controller that sets an assist control amount, an integrated control amount calculating portion that calculates an integrated control amount by adding the automatic steering control amount and the assist control amount, and an actual automatic steering angle calculating portion that calculates, based on at least one of either of a steering torque and the assist control amount, an actual automatic steering angle that is a steering angle due to automatic steering control and included in an actual steering angle. The automatic steering controller uses a target automatic steering angle and the actual automatic steering angle to set the automatic steering control amount.
    Type: Application
    Filed: April 25, 2019
    Publication date: August 19, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Mitsuko YOSHIDA, Naoki SHOJI, Robert FUCHS
  • Publication number: 20210253156
    Abstract: A steering system includes an upper jacket, a lower jacket, a support, a lock mechanism, and a shock absorber. The support supports the lower jacket. The lock mechanism switches a restriction of a telescopic adjustment and a termination of the restriction. The upper jacket includes a protruding stopper configured to regulate a position of the upper jacket at one end of a telescopic stroke range. The lock mechanism includes an opening and closing portion configured to enter a path of the stopper while the restriction of the telescopic adjustment is terminated, and configured to open the path of the stopper while the telescopic adjustment is restricted.
    Type: Application
    Filed: February 10, 2021
    Publication date: August 19, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Susumu IMAGAKI, Masayoshi SAKUDA, Kota HIGUCHI, Kazuki FUJIWARA, Kenji UTSUNOMIYA, Takuya ADACHI
  • Patent number: 11091195
    Abstract: A motor control device for controlling drive of an electric motor that controls a steering angle of a steering device, the motor device includes: a torque sensor and an electronic control unit. The torque sensor is configured to detect steering torque acting on a steering member. The electronic control unit is configured to: generate a steering angle command value based on the steering torque by using an equation of motion that is a reference model of the steering device; control driving of the electric motor so that an actual steering angle follows the steering angle command value; and limit a virtual reaction force that is a reaction force component of the equation of motion.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: August 17, 2021
    Assignee: JTEKT CORPORATION
    Inventor: Naoki Shoji
  • Patent number: 11092197
    Abstract: A rolling bearing device includes: a bearing portion; an oil supply unit that has a pump; a first detection portion that detects operation of the pump; a second detection portion that detects the rotational state of the bearing portion; and a processing portion that generates determination information related to the lubrication state of the bearing portion on the basis of a detection signal from the first detection portion and a detection signal from the second detection portion. The processing portion outputs, to the pump, an instruction signal for oil supply when it is determined that operation of the pump is appropriate and that the rotational state of the bearing portion is not appropriate, and re-determines, after the lapse of a predetermined time, whether or not the rotational state of the bearing portion is appropriate.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: August 17, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Yoshimichi Higashiyama, Yusuke Ueda, Tsukasa Sakazaki
  • Publication number: 20210245759
    Abstract: A travel assistance device configured to execute travel assistance when a plurality of vehicles form a vehicle group and travel in a line. The travel assistance device includes: a first control unit configured to, if there is lane-change instruction for the vehicle group, cause an end-of-line vehicle to change lanes, such vehicle being the vehicle from among the plurality of vehicles forming the vehicle group that is positioned at the end of the line; and a second control unit configured to, following the lane change of the end-of-line vehicle, allow a lane change for at least one vehicle that is other than the end-of-line vehicle and that is one of the vehicles forming the vehicle group.
    Type: Application
    Filed: April 25, 2019
    Publication date: August 12, 2021
    Applicants: JTEKT CORPORATION, HINO MOTORS, LTD.
    Inventors: Syuuichi YONEMURA, Masayoshi TAKEDA, Hirokazu OKUYAMA, Hirofumi YASUI, Naoshi ICHINOSE, Nobuhiko KOJIMA, Tomonari YAMAKAWA, Sadahiro KAWAHARA
  • Patent number: 11084524
    Abstract: A first microcomputer is configured to identify the cause (a content of the abnormality) of a communication abnormality based on a combination of whether communication through a first communication line is established, whether communication through a second communication line is established, and whether a second clock is normal. Specifically, the first microcomputer separately determines whether the communication abnormality between the first microcomputer and a second microcomputer is simply due to an abnormality in the first communication line and the second communication line, or due to stop of a function of the second microcomputer. The second microcomputer is configured to identify the cause of the communication abnormality based on a combination of whether the communication through the first communication line is established, whether the communication through the second communication line is established, and whether a first clock is normal.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: August 10, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Masashi Fuji, Satoru Mikamo, Tomohiro Niwa
  • Patent number: 11084527
    Abstract: Method for monitoring the operation of a power steering system including a steering wheel, a servo motor and a monitoring module, characterized in that said method involves a step of determining at least one temporary limit value of a parameter, a step of estimating an additional value which an assistance functionality contributes to a setpoint value of the parameter, and a step of correcting the at least one temporary limit value by the additional value.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: August 10, 2021
    Assignee: JTEKT EUROPE
    Inventors: Romain Moretti, Tahar Slama
  • Patent number: 11084375
    Abstract: A drive force transmission apparatus is mountable on a four-wheel drive vehicle switchable between a four-wheel drive mode that transmits a drive force of an engine to front wheels and rear wheels, and a two-wheel drive mode that transmits the drive force to only the front wheels. The drive force transmission apparatus allows adjustment of the drive force to the rear wheels, and includes a multi-plate clutch, a piston for axially pressing the multi-plate clutch, an actuator for axially moving the piston, and a control unit for controlling the actuator. Upon satisfaction of a predetermined condition that indicates a high probability of the vehicle needing to be switched from the two-wheel drive mode to the four-wheel drive mode, the control unit causes the actuator to displace the piston by a predetermined amount with respect to an initial position of the piston toward the multi-plate clutch.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: August 10, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Tomohiro Nozu, Tsutomu Matsumoto, Tomoaki Kato, Akiyoshi Kakita, Kenta Taniguchi
  • Patent number: 11085496
    Abstract: A clutch device includes a clutch housing including a cylindrical portion and a bottom, a multiple disc clutch, a receiving member and a pressing member that moves in an axial direction with respect to the clutch housing to press the multiple disc clutch from the bottom side toward the receiving member. The pressing member includes an annular portion disposed radially inward or outward of the bottom and a plurality of protruding portions protruding in a radial direction from the annular portion, the annular portion being provided integrally with the protruding portions. The bottom of the clutch housing has a plurality of cutouts that accommodate the protruding portions. The protruding portions move in the axial direction within the cutouts to press the multiple disc clutch.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: August 10, 2021
    Assignee: JTEKT Corporation
    Inventor: Noriyuki Fujii
  • Publication number: 20210240201
    Abstract: A platooning system includes a vehicle control system installed in each of vehicles that include a manually-driven head vehicle. The vehicle control system controls a host vehicle such that the host vehicle follows a lead vehicle through wireless communication between the host vehicle and the lead vehicle. The vehicle control system is installed in the host vehicle and the lead vehicle. The vehicle control system includes a sensor that detects a state of the host vehicle, an actuator that adjusts a behavior of the host vehicle, and a controller that controls the host vehicle. The controller of the head vehicle physically notifies a driver of the host vehicle of a state of a subsequent vehicle by operating the actuator of the host vehicle when a state signal including information that indicates the state of the subsequent vehicle is received through the wireless communication.
    Type: Application
    Filed: April 22, 2019
    Publication date: August 5, 2021
    Applicants: JTEKT CORPORATION, HINO MOTORS, LTD.
    Inventors: Hirokazu OKUYAMA, Nobuhiko KOJIMA, Naoshi ICHINOSE, Hirofumi YASUI, Masayoshi TAKEDA, Syuuichi YONEMURA, Sadahiro KAWAHARA, Tomonari YAMAKAWA
  • Patent number: 11077508
    Abstract: A gear machining apparatus performs cutting work for a workpiece and generates a gear by performing a feed operation of a gear cutter relative to the workpiece along a direction of an axis of the workpiece while synchronously rotating the gear cutter and the workpiece in a state in which an axis of the gear cutter is inclined with respect to a line parallel to the axis of the workpiece. The gear machining apparatus continuously performs cutting work for a first tooth flank and cutting work for a second tooth flank during a single feed operation, and changes a correction angle between the cutting work for the first tooth flank and the cutting work for the second tooth flank.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: August 3, 2021
    Assignee: JTEKT Corporation
    Inventors: Hiroyuki Nakano, Hisashi Otani, Shuntaro Takasu