Patents Assigned to JTEKT Corporation
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Publication number: 20240072617Abstract: A motor control device controls a motor including winding groups of two systems. The motor control device includes a board and sensors provided on the board and configured to generate electric signals based on rotation of the motor. The board includes a first area and a second area defined across a boundary line. The first area and the second area include power circuit areas, control circuit areas, signal paths through which the electric signals are transmitted to the control circuit areas, and power paths through which electric power supplied from a power supply is transmitted to the power circuit areas, respectively. The signal paths are provided not to cross the power paths and the power circuit areas when viewed in an axial direction of the motor, respectively.Type: ApplicationFiled: February 19, 2021Publication date: February 29, 2024Applicant: JTEKT CORPORATIONInventor: Yuto SATO
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Publication number: 20240060539Abstract: An inner joint member has, on an opening portion side of an outer joint member, a holding portion that has a bottomed concave shape into which a sleeve for supporting a boot covering the opening portion is press-fitted, and a relief portion that is provided on part of a convex outer spherical surface at the opening portion side, and that has a smaller diameter than an outer diameter of the convex outer spherical surface corresponding to a press-fitting range of the holding portion into which the sleeve is press-fitted.Type: ApplicationFiled: February 18, 2021Publication date: February 22, 2024Applicant: JTEKT CORPORATIONInventors: Kaname ONODA, Koki WATANABE
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Patent number: 11904931Abstract: 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: GrantFiled: January 12, 2021Date of Patent: February 20, 2024Assignee: JTEKT CORPORATIONInventors: Takeshi Watanabe, Yasuyuki Nozawa, Kei Kitahara
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Patent number: 11897550Abstract: A steering control device configured to control a steering device includes a control unit. The control unit is configured to calculate a torque command value which is a target value of the motor torque based on execution of angle control for adjusting a convertible angle which is able to be converted to a rotation angle of the motor to a target angle; calculate the motor control signal based on the torque command value; and change a control gain which is used for the angle control based on a change of a factor influencing a behavior of a vehicle in response to steering.Type: GrantFiled: March 24, 2021Date of Patent: February 13, 2024Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi Kodera, Toru Takashima, Shunsuke Yoshida
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Patent number: 11897555Abstract: A steering control device includes an electronic control unit. The electronic control unit is configured to detect an absolute steering angle, to calculate a current command value, to control driving of a motor such that an actual current value which is supplied to the motor reaches the current command value, to store an end-position-corresponding angle which is correlated with the absolute steering angle, to perform end contact relaxation control for correcting the current command value such that a decrease of an end separation angle is regulated when the end separation angle is equal to or less than a predetermined angle, and to calculate the current command value such that an increase of the end separation angle is not regulated by the end contact relaxation control when the end separation angle is equal to or less than the predetermined angle.Type: GrantFiled: September 11, 2020Date of Patent: February 13, 2024Assignee: JTEKT CORPORATIONInventors: Takahiro Toko, Nobuaki Kataoka, Takafumi Yamaguchi, Yukinobu Ezaki
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Patent number: 11897554Abstract: A turning control system includes an electronic control unit. The electronic control unit is configured to perform: a steering operation amount calculating process of calculating a steering operation amount; an angle command value calculating process of calculating an angle command value; an angle operation amount calculating process of calculating an angle operation amount; an operation process of operating a drive circuit of an electric motor; an adjustment process of adjusting a magnitude of a value obtained by subtracting the angle operation amount which is reflected in the operation process from the angle operation amount; and a correction process of correcting a magnitude of an input when the angle command value is calculated in the angle command value calculating process to be less when the magnitude of the subtracted value is great than when the magnitude of the subtracted value is small.Type: GrantFiled: April 16, 2020Date of Patent: February 13, 2024Assignee: JTEKT CORPORATIONInventor: Terutaka Tamaizumi
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Patent number: 11897552Abstract: The steering control system of a steer-by-wire vehicle includes a turning angle calculation unit for calculating a target turning angle based on a steering angle of a steering wheel, and a reaction torque calculation unit for calculating a target reaction torque based on a state of the vehicle. When an alert request is issued, the reaction torque calculation unit calculates a basic reaction torque based on the steering angle, calculates an alert reaction torque for notifying a vehicle state, and calculates the target reaction torque obtained by summing the basic reaction torque and the alert reaction torque. In a process of calculating the target turning angle from the steering angle, the turning angle calculation unit calculates the target turning angle by excluding a steering angle or a turning angle corresponding to the alert reaction torque.Type: GrantFiled: April 1, 2021Date of Patent: February 13, 2024Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATIONInventors: Tetsuya Morino, Yoshio Kudo, Isao Namikawa, Takashi Kodera
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Patent number: 11891137Abstract: A steer-by-wire steering system for a vehicle, including: an operating device including a steering operating member, a counterforce applying mechanism configured to apply, to the steering operating member, an operation counterforce by a counterforce motor, and an operating controller configured to control the operation counterforce; a steering device including a steering actuator configured to steer a wheel by a steering motor and a steering controller configured to control an amount of steering of the wheel by the steering actuator; and a communication line communicably connecting the operating controller and the steering controller, wherein the steering controller is configured to: determine a status code based on a status of the steering device; and transmit the status code to the operating controller via the communication line; and wherein the operating controller is configured to change a magnitude of the operation counterforce in accordance with the status code received by the operating controller.Type: GrantFiled: November 4, 2021Date of Patent: February 6, 2024Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATIONInventors: Tomoyuki Iida, Masaharu Yamashita, Kenji Shibata, Yuji Fujita, Takashi Kodera, Isao Namikawa, Satoshi Matsuda
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Publication number: 20240034406Abstract: A steering computing device for calculating state quantity of a steering apparatus includes a processor. The processor is configured to execute a steering angle variable acquisition process, an output shaft angle variable acquisition process, and a joint angle variable calculation process. The steering angle variable acquisition process is a process of acquiring a value of a steering angle variable. The output shaft angle variable acquisition process is a process of acquiring a value of an output shaft angle variable as a variable indicative of a rotation angle of an output shaft of the steering apparatus. The joint angle variable calculation process is a process of calculating a value of the joint angle variable. The joint angle variable is a variable defining an angle formed between an axial direction of an input shaft of the steering apparatus and an axial direction of the output shaft.Type: ApplicationFiled: July 25, 2023Publication date: February 1, 2024Applicant: JTEKT CORPORATIONInventors: Shunsuke TSUJII, Yufeng LIN, Hidenori ITAMOTO, Terutaka TAMAIZUMI
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Publication number: 20240034394Abstract: A turning control device for controlling, as a controlled object, a turning apparatus including a steering wheel, an input shaft, an intermediate shaft, an output shaft, a first Cardan joint, a second Cardan joint, steered wheels, and an assist motor includes a control device. The control device configured to execute: a torque acquisition process of acquiring a detection value of a torque applied to a position closer to the steered wheels than the second Cardan joint; a steering angle variable acquisition process of acquiring a value of a steering angle variable indicative of a steering angle as an angle of the steering wheel; and an assist control process including a fluctuation torque control process of fluctuating the torque of the assist motor in accordance with the steering angle with the value of the steering angle variable being taken as an input.Type: ApplicationFiled: July 25, 2023Publication date: February 1, 2024Applicant: JTEKT CORPORATIONInventors: Shunsuke TSUJII, Yufeng LIN, Hidenori ITAMOTO, Terutaka TAMAIZUMI
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Publication number: 20240034399Abstract: A steering computing device that calculates a value of a state variable about a steering apparatus includes a storage device and an execution device. The execution device is configured to execute a bending angle acquisition process and a tilt angle calculation process, and the bending angle acquisition process is a process of acquiring a first bending angle and a second bending angle. The tilt angle calculation process is a process of calculating a tilt angle. The first bending angle is an angle formed between an input shaft of the steering apparatus and an intermediate shaft of the steering apparatus. The second bending angle is an angle formed between an output shaft of the steering apparatus and the intermediate shaft, and the tilt angle is a variable indicative of an angle formed between an axial direction of the input shaft and a reference direction.Type: ApplicationFiled: July 25, 2023Publication date: February 1, 2024Applicant: JTEKT CORPORATIONInventors: Shunsuke TSUJII, Yufeng LIN, Hidenori ITAMOTO, Terutaka TAMAIZUMI
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Patent number: 11884340Abstract: A steering control device includes: a first calculator configured to calculate, according to a turning state, a first control amount for causing a motor to generate an assistance force; a second calculator configured to calculate a second control amount for adapting an actual angle to a target angle that is convertible into a turning angle of a steering wheel and generated when a host control device intervenes in steering control; and a third calculator configured to calculate, according to the turning state, a third control amount for offsetting the second control amount when the host control device intervenes in steering control.Type: GrantFiled: August 30, 2021Date of Patent: January 30, 2024Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Shingo Nitta, Takahiro Toko, Yoji Kunihiro, Takahiro Kojo, Hisaya Akatsuka
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Publication number: 20240025473Abstract: A steering control system that controls a steering device of a vehicle includes a storage unit, and a control unit configured to make a state transition to a normal control state via a start-up state after a power source system of the vehicle is started. In the start-up state, the control unit executes a correction information storing process of acquiring correction element information using a state variable obtained from the steering device and writing correction information obtained based on the correction element information into the storage unit. In the start-up state, the control unit is configured to execute an abnormal condition determination process of determining whether an abnormal condition indicating that the correction information is abnormal is met. The correction information storing process is re-executed when the abnormal condition is met. The abnormal condition determination process is executed at least either before or after the correction information storing process.Type: ApplicationFiled: July 14, 2023Publication date: January 25, 2024Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Takashi KOUDAI, Yuji FUJITA, Yugo NAGASHIMA, Kazuma HASEGAWA, Yuuta KAJISAWA, Masaharu YAMASHITA, Atsushi SATOU, Yosuke YAMASHITA, Kazuaki IIDA, Shintaro TAKAYAMA, Takeshi IWANA, Toyohiro HAYASHI, Hayaki TANABE, Nobuyori NAKAJIMA, Hiroki TOMIZAWA
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Publication number: 20240025471Abstract: A vehicle control unit includes a controller configured to make a state transition to a normal control state via a start-up state after a power source system of a vehicle is started. The start-up state is a state where it is possible to execute a preparation process, required for making a state transition to the normal control state, by controlling an operation member so as to move automatically. The controller is configured to execute, in the start-up state: a forced-ending condition determination process of determining whether a forced-ending condition showing that the preparation process being executed is to be forcedly ended from start of execution of the preparation process is met; a forced-ending process of forcedly ending the preparation process being executed when the forced-ending condition is met; and a notification process of notifying the driver of forced ending of the preparation process.Type: ApplicationFiled: July 19, 2023Publication date: January 25, 2024Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Takashi KOUDAI, Yuji FUJITA, Kenichi ABE, Yugo NAGASHIMA, Kazuma HASEGAWA, Yuuta KAJISAWA, Masaharu YAMASHITA, Shintaro TAKAYAMA, Takeshi IWANA, Hiroki TOMIZAWA, Toyohiro HAYASHI, Hayaki TANABE, Nobuyori NAKAJIMA
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Publication number: 20240017242Abstract: The present invention relates to a thermal insulator containing a polymer sorbent that regenerates by desorbing adsorbed moisture, and a thermal insulation material. The thermal insulator of the present invention has the thermal insulation performance and prevents deterioration of the object by repeatedly absorbing liquid water between the object to be thermally insulated and the thermal insulator to reduce and prevent retention of water droplets between an object to be thermally insulated and a thermal insulator.Type: ApplicationFiled: November 2, 2021Publication date: January 18, 2024Applicants: JTEKT CORPORATION, NATIONAL UNIVERSITY CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEMInventors: Toshiyuki SAITO, Kenichi RYUGO, Motoo NAKAI, Kazuki NAKANISHI
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Publication number: 20240019038Abstract: A pressure reduction valve includes a body including a gas passage, a valve seat provided in the gas passage, and a valve member provided on a downstream side of the valve seat in the gas passage. The gas passage includes a primary-side passage section located on an upstream side of the valve member, and a secondary-side passage section located on a downstream side of the valve member. The primary-side passage section includes a pressure chamber, which is a space formed between the valve member and the valve seat. The valve member includes a valve member passage that connects the pressure chamber to the secondary-side passage section, and an auxiliary passage configured to assist gas that flows into the pressure chamber through a clearance between the valve member and the valve seat to flow out to the secondary-side passage section.Type: ApplicationFiled: June 22, 2021Publication date: January 18, 2024Applicant: JTEKT CORPORATIONInventors: Kazushi NUMAZAKI, Tetsuya KANEKO, Akira NAKANO, Kazuhiro TAKABAYASHI, Kazuo HANEDA, Yuya KIHARA
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Patent number: 11875685Abstract: A convoy travel system includes a plurality of vehicles and is configured such that the plurality of vehicles form a convoy and travel. The plurality of vehicles include a preceding vehicle and following vehicles configured so as to follow the preceding vehicle by means of automatic driving. The preceding vehicle is equipped with a steering information acquisition unit configured so as to acquire steering information pertaining to steering of the preceding vehicle, and a transmission unit configured so as to transmit the steering information to the following vehicles. The following vehicles are equipped with a reception unit configured so as to receive the steering information, and an automatic driving control unit configured so as to begin a steering angle control for avoiding a collision with an obstruction when the steering information indicates the execution of emergency steering for avoiding a collision with the obstruction.Type: GrantFiled: July 12, 2019Date of Patent: January 16, 2024Assignees: HINO MOTORS, LTD., JTEKT CORPORATIONInventors: Hirokazu Okuyama, Nobuhiko Kojima, Naoshi Ichinose, Hirofumi Yasui, Tomonari Yamakawa, Sadahiro Kawahara, Masayoshi Takeda, Syuuichi Yonemura
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Publication number: 20240010269Abstract: A steering control system includes a plurality of control circuits configured to control a reaction force motor and a turning motor in coordination with one another, the reaction force motor generating a steering reaction force applied to a steering wheel from which power transmission to turning wheels of a vehicle is cut off, the turning motor generating a turning force for turning the turning wheels. When at least one control circuit among the control circuits that are operating normally is reset, the reset control circuit is configured to execute a process for stopping travel of the vehicle upon restarting after completion of the reset.Type: ApplicationFiled: July 7, 2023Publication date: January 11, 2024Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Yugo NAGASHIMA, Yuji FUJITA, Yuuta KAJISAWA, Kazuma HASEGAWA, Takashi KOUDAI, Masaharu YAMASHITA, Atsushi SATOU, Yosuke YAMASHITA, Kazuaki IIDA, Shintaro TAKAYAMA, Toyohiro HAYASHI, Hiroki TOMIZAWA, Nobuyori NAKAJIMA, Hayaki TANABE, Takeshi IWANA
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Publication number: 20240010267Abstract: A steering control device includes a first reaction force control circuit and a second reaction force control circuit. Each of the first reaction force control circuit and the second reaction force control circuit are configured to control a reaction force motor, to execute, at a starting time, a preparation process including a process that requires the steering wheel to automatically rotate through the reaction force motor, and to store, at a time of execution completion of the preparation process, information indicating whether the preparation process has been normally completed. In a case where the first reaction force control circuit has been reset, when the information indicates that the preparation process has been normally completed, the first reaction force control circuit that has been rest is configured to not execute the preparation process at a time of restarting after completion of the reset.Type: ApplicationFiled: July 3, 2023Publication date: January 11, 2024Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Kaishi MONOBE, Yuji FUJITA, Kazuma HASEGAWA, Yuuta KAJISAWA, Yugo NAGASHIMA, Takashi KOUDAI, Kenichi ABE, Masaharu YAMASHITA, Atsushi SATOU, Yosuke YAMASHITA, Kazuaki IIDA, Shintaro TAKAYAMA, Toyohiro HAYASHI, Hiroki TOMIZAWA, Nobuyori NAKAJIMA, Hayaki TANABE, Takeshi IWANA
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Publication number: 20240000053Abstract: There is provided a rearing apparatus including a hatching area that holds eggs of organisms to be reared and accommodates the organisms hatched from the eggs, and a rearing area that is defined in an area larger than the hatching area at a position different from the hatching area and in which the organisms are reared. The present disclosure provides a rearing apparatus that can implement high-density and large-scale rearing by effectively utilizing areas.Type: ApplicationFiled: November 2, 2021Publication date: January 4, 2024Applicants: JTEKT CORPORATION, Tokushima UniversityInventors: Yasuhiro MURATA, Akihiro TAKAZATO, Shigekazu KAWAI, Nozomu MIURA, Takahito WATANABE, Taro MITO