Patents Assigned to JTEKT
  • Patent number: 11078824
    Abstract: A cooling system includes an electric pump, a cooling target temperature sensor, a coolant temperature sensor, and an electronic control unit. The electric pump pumps a coolant to a circulation channel connected to an inlet and an outlet of a cooling channel in which heat is exchanged with a cooling target. The cooling target temperature sensor detects a cooling target temperature. The coolant temperature sensor is arranged upstream of the inlet in the circulation channel, and detects a coolant temperature. The electronic control unit controls driving of the electric pump so that a discharge flow rate of the electric pump matches a target flow rate, and sets the target flow rate using an equation based on a reference value obtained by dividing a difference between the cooling target temperature and a target cooling temperature of the cooling target by a difference between the cooling target temperature and the coolant temperature.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: August 3, 2021
    Assignee: JTEKT Corporation
    Inventor: Hiroki Kagawa
  • Patent number: 11079006
    Abstract: A differential unit includes: a pinion gear shaft including a shaft portion and a gear portion; a ring gear meshing with the gear portion; a differential case that rotates with the ring gear; a differential gear mechanism accommodated in the differential case; a differential carrier having an accommodating space accommodating the differential case and the ring gear; and a pair of bearings supporting the pinion gear shaft such that the pinion gear shaft is rotatable with respect to the differential carrier. The differential carrier has an inner cylindrical portion, an outer cylindrical portion, and a connecting portion that are provided as a single member. The inner cylindrical portion has the pair of bearings fitted in the inner cylindrical portion. The outer cylindrical portion is provided radially outward of the inner cylindrical portion. The connecting portion connects the inner cylindrical portion and the outer cylindrical portion.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: August 3, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Takao Kimura, Yutaka Sato
  • Publication number: 20210229739
    Abstract: A control apparatus for a steering system includes control circuitry configured to perform an angle control process for controlling, to an angle command value, a convertible angle that is convertible into a rotational angle of the electric motor, a predetermined component calculation process for calculating a predetermined component containing at least one of two components that are a viscosity component and a friction component of the steering system, while using a value of a variable regarding a control quantity of the electric motor as an input, and a relationship change process for changing a relationship of an output from a control unit for the steering system to an input to the control unit, based on the predetermined component calculated through the predetermined component calculation process.
    Type: Application
    Filed: January 25, 2021
    Publication date: July 29, 2021
    Applicant: JTEKT CORPORATION
    Inventor: Takashi KODERA
  • Publication number: 20210234190
    Abstract: A lithium ion secondary battery that can operate in a high-temperature environment of 85° C. The lithium ion secondary battery includes a positive electrode active material that can store and release lithium ions Li|, a positive electrode binder that binds the positive electrode active material, a negative electrode active material that can store and release lithium ions Li+, a negative electrode binder that binds the negative electrode active material, and an electrolytic solution containing an organic solvent and an imide-based lithium salt. The negative electrode active material is previously doped with lithium ions. The positive electrode binder has a Hansen solubility parameter-based relative energy difference (RED) value of more than 1 with respect to the electrolytic solution.
    Type: Application
    Filed: April 26, 2019
    Publication date: July 29, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Yukihiro KOMATSUBARA, Takumi MIO, Kentaro IIZUKA, Takafumi FUJII, Koji NISHI, Naoki OHMI, Yusuke KIMOTO
  • Publication number: 20210229736
    Abstract: A turning apparatus includes tie rods, a wheel turning shaft, two motors, two ball screws, a transmission mechanism, and two controllers. The wheel turning shaft turns steered wheels of a vehicle. A first controller that is any one of the two controllers computes a current command value and allocates the current command value to the motors at a ratio that varies with a position of the wheel turning shaft in an axial direction. The two controllers each supply any one of the motors, which is an object to be controlled by a corresponding one of the controllers, with a current according to a corresponding of individual current command values.
    Type: Application
    Filed: January 22, 2021
    Publication date: July 29, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Toshiaki OGATA, Fumio KISHIDA, Yoshio KONDO, Keishi NAKAMURA
  • Publication number: 20210229737
    Abstract: A steering control device includes: an absolute steering angle detecting unit configured to detect an absolute steering angle; and a current command value calculating unit configured to calculate a current command value corresponding to a target value of the motor torque output from the motor. The current command value calculating unit is configured to perform partial release control for decreasing a correction value of the current command value due to execution of the end contact relaxation control when a vehicle is tried to be turned at the time of execution of the end contact relaxation control. The current command value calculating unit is configured to stop the partial release control when the current command value which is calculated at the time of execution of the partial release control is a value which is not affected by decreasing the correction value based on execution of the partial release control.
    Type: Application
    Filed: January 25, 2021
    Publication date: July 29, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Takafumi YAMAGUCHI, Takahiro TOKO, Nobuaki KATAOKA, Yukinobu EZAKI
  • Patent number: 11072362
    Abstract: The vehicle steering system includes a rack shaft and a conversion mechanism that converts rotation of a rotating shaft of the motor into reciprocating motion of the rack shaft. The conversion mechanism includes a drive pulley that rotates with the rotating shaft, a driven pulley rotatable about an axis of the rack shaft and a toothed belt extending around the drive pulley and the driven pulley, and converts rotation of the rotating shaft into reciprocating motion of the rack shaft when rotation of the drive pulley is transmitted to the driven pulley via the toothed belt. The vehicle steering system further includes a determination circuit that determines tooth skipping that is a change in meshing position between the drive pulley and the toothed belt, and a calculation circuit that calculates an integrated value obtained by integrating a prescribed value indicating that tooth skipping is determined by the determination circuit.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: July 27, 2021
    Assignee: JTEKT CORPORATION
    Inventor: Yousuke Shirauchi
  • Patent number: 11072363
    Abstract: A control system for a motor includes: a first processing circuit configured to operate a first drive circuit; a second processing circuit configured to operate a second drive circuit; and a command circuit configured to output a signal relating to a command value for a steered angle of a steered wheel to the first processing circuit and the second processing circuit. The command circuit is configured to execute a detection process, a first notification process, and a second notification process. The first processing circuit is configured to execute a first correction process based on a first result signal to control the steered angle to the command value. The second processing circuit is configured to execute a second correction process based on a second result signal to control the steered angle to the command value.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: July 27, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Takahiro Toko, Ryo Irie
  • Publication number: 20210220208
    Abstract: There are provided systems for providing a walking environment and supporting walking, and a method for providing a walking environment including: a location information collection step that collects a location information of a walking support equipment; an environmental information collection step that collects an environmental information used upon providing the walking environment while going out; and a process execution step that executes a process of providing the walking environment to an user of the walking support equipment, based on the environmental information collected in the environmental information collection step and the location information collected in the location information collection step.
    Type: Application
    Filed: January 20, 2021
    Publication date: July 22, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Yoshiyuki SHIBATA, Manabu KANAYA, Yuki MATSUOKA, Osamu HONDA, Yusaku YASUI, Yoshinori WADA, Chishin YOHENA
  • Publication number: 20210222741
    Abstract: A driving force transmission control device includes a driving force transmission device configured to press a friction clutch by an actuator and a controller configured to control the driving force transmission device. The controller calculates a torque command value indicating a driving force to be transmitted from a rotating member on an input side to a rotating member on an output side based on information of a vehicle. The controller sets an electric current command value according to a magnitude and an amount of time change of the torque command value. The electric current command value is a target value of an electric current. The controller performs electric current feedback control such that an electric current corresponding to the calculated electric current command value is supplied to the actuator.
    Type: Application
    Filed: January 15, 2021
    Publication date: July 22, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Ichiro ODA, Go NAGAYAMA, Tomonori ONO, Takashi KOUZAI
  • Publication number: 20210221424
    Abstract: A steering system includes a steering operation shaft, a lower shaft, an upper shaft, and an intermediate. The intermediate shaft includes a tubular member including a hollow portion; and a shaft member. An oil groove that retains lubricating oil is provided in a predetermined range in an axial direction of the intermediate shaft on at least one of an outer peripheral surface of the shaft member at a part housed in the hollow portion and an inner peripheral surface of the hollow portion of the tubular member. A sectional area of the oil groove in an upper shaft-side part of the predetermined range is larger than a sectional area of the oil groove in a lower shaft-side part of the predetermined range, the upper shaft-side part being located on a side of the upper shaft, and the lower shaft-side part being located on a side of the lower shaft.
    Type: Application
    Filed: January 12, 2021
    Publication date: July 22, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Yasunori KAMITANI, Gaku TAKIMOTO
  • Publication number: 20210223126
    Abstract: A rotation angle detection device includes a correction-object driven gear that is a driven gear meshing with a main driving gear, a first sensor that is configured to generate an electrical signal based on rotation of the correction-object driven gear, and an electronic control unit that computes a driven-side rotation angle based on the electrical signal. The electronic control unit is configured to store a correction angle used to correct the driven-side rotation angle when computing the driven-side rotation angle. The correction angle is a predetermined deviation in a predetermined angle domain obtained as an average value in which deviations of the number equal to the integer and corresponding to a same relative rotation angle is averaged, so as to be deviation in an angle domain of 0 to 360 degrees.
    Type: Application
    Filed: January 14, 2021
    Publication date: July 22, 2021
    Applicant: JTEKT CORPORATION
    Inventor: Yuichi TOYAMA
  • Publication number: 20210221423
    Abstract: A steering column device includes a metal outer-side cylindrical member, a metal inner-side cylindrical member, and a resin intermediate cylindrical member that is disposed between the outer-side cylindrical member and the inner-side cylindrical member. The intermediate cylindrical member has an oil feed orifice through which the semisolid lubricating oil is guided from an outer circumferential face side to an inner circumferential face side when inserting the intermediate cylindrical member into the outer-side cylindrical member.
    Type: Application
    Filed: January 11, 2021
    Publication date: July 22, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Hidenori KAKINUMA, Yasunori KAMITANI, Soma IWAI, Keiji KISHIMOTO
  • Publication number: 20210222728
    Abstract: A steering assembly of a vehicle, including a connecting rod, one end of which includes a steering ball joint, a hub element of a wheel of the vehicle, and a sealing bellows which is positioned between the steering ball joint and the hub element, wherein the steering assembly further includes at least one sealing element which has an insulation face in contact with the hub element and a sliding face in contact with the sealing bellows.
    Type: Application
    Filed: May 23, 2019
    Publication date: July 22, 2021
    Applicant: JTEKT EUROPE
    Inventor: Philippe DURAND
  • Patent number: 11068812
    Abstract: A work instruction system for a facility including processing machines is configured to provide work instructions on the processing machines to workers. The work instruction system includes a process plan storage section configured to store a process plan that defines a performing sequence regarding processing performed by the processing machines and work on the processing machines performed by the workers; a next work candidate extraction section configured to extract next work candidates for the workers based on current states of the processing machines and the process plan; a capacity database configured to store work capacity of each worker with regard to each work type; and a next work determination section configured to determine next work for a specified worker from among the next work candidates, based on the work capacity stored in the capacity database.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: July 20, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Toshiyuki Tsuzuki, Toshio Aono
  • Patent number: 11067186
    Abstract: A pressure reducing valve includes a piston disposed in a cylinder chamber; a valve element that is coupled to the piston and opens and closes a valve seat; a valve spring that biases the valve element in a direction in which the valve element is moved away from the valve seat; and a biasing member that biases the valve seat toward a side opposite to the piston. The pressure reducing valve is configured to reduce a primary pressure of a fluid to a secondary pressure. The valve seat is disposed such that the valve seat reciprocates in the same direction as a direction in which the valve element reciprocates in the primary pressure chamber. As a difference between the primary pressure and the secondary pressure increases, the valve seat moves toward the secondary pressure chamber.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: July 20, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Kazushi Numazaki, Kazuhiro Takabayashi, Taizan Morita
  • Patent number: 11066095
    Abstract: A controller includes a control circuit configured to calculate a target corresponding steered angle that is a target value of a corresponding steered angle based on the transmission ratio associated with the vehicle speed. The corresponding steered angle is a rotation angle of a rotation shaft, which is convertible to the steered angle whose magnitude is changed relative to a value indicating the steering angle. The control circuit is configured to control the actuation of the motor so that an actual corresponding steered angle is a final target corresponding steered angle that is based on the target corresponding steered angle. The control circuit is configured to calculate the target corresponding steered angle by adjusting the transmission ratio based on a value indicating acceleration or deceleration of a vehicle.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: July 20, 2021
    Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi Kodera, Masayuki Kita, Toru Takashima, Tetsuya Morino
  • Patent number: 11066101
    Abstract: A steering angle calculating circuit includes a first neutral point calculating circuit, a second neutral point calculating circuit, and an absolute angle calculating circuit. The first neutral point calculating circuit calculates a motor neutral point (?m01), based on a steering angle detected by a steering sensor and a rotation angle of a motor detected by the relative angle sensor, when a drive source for driving a vehicle is started. The second neutral point calculating circuit calculates a motor neutral point when the steering angle detected by the steering sensor falls within a predetermined angle range in which a specific stroke with respect to the steering angle is constant. After the motor neutral point is calculated by the second neutral point calculating circuit, the absolute angle calculating circuit calculates the steering angle as an absolute angle, using the motor neutral point calculated by the second neutral point calculating circuit.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: July 20, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Hiroshi Hosono, Akira Nambu, Tatsuya Suzuki
  • Patent number: 11067158
    Abstract: A driving force distribution apparatus includes a driving force connecting/disconnecting mechanism between a pinion gear shaft and an intermediate rotational member, a first driving force adjustment mechanism between the intermediate rotational member and a second output rotational member, a second driving force adjustment mechanism between the intermediate rotational member and a first output rotational member, and a hydraulic unit configured to generate pressures of hydraulic oil for operating the driving force connecting/disconnecting mechanism and the first and second driving force adjustment mechanisms. The hydraulic unit includes a single hydraulic pump and a hydraulic circuit configured to distribute a pressure of the hydraulic oil, which is discharged from the hydraulic pump, to cylinder chambers of pistons.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: July 20, 2021
    Assignee: JTEKT CORPORATION
    Inventor: Noriyuki Fujii
  • Publication number: 20210213997
    Abstract: A steering system configured to steer a vehicle includes a rotary shaft to which an operation member is coupled; a moving unit configured to move the operation member between a normal position that is a position where the operation member is operated by a driver, and a storage area located ahead of the normal position; an external force detection unit configured to detect an external force externally applied to the operation member while the operation member is moving; a determination unit configured to determine whether a direction of the external force detected by the external force detection unit is the same as a moving direction of the operation member; and a control unit configured to control operation of the steering system based on a determination result from the determination unit.
    Type: Application
    Filed: January 12, 2021
    Publication date: July 15, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Takeshi WATANABE, Yasuyuki NOZAWA, Kei KITAHARA