Patents Assigned to JTEKT
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Patent number: 11661107Abstract: A steering control device includes control circuitry configured to perform synchronization control.Type: GrantFiled: March 31, 2021Date of Patent: May 30, 2023Assignee: JTEKT CORPORATIONInventors: Yoshiyuki Uchino, Yusuke Kakimoto, Koji Anraku, Isao Namikawa, Kenji Shibata, Takafumi Sato
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Publication number: 20230159806Abstract: A seal rubber composition contains a carboxyl group-containing acrylic rubber, silica, and two or more inorganic fibers, an amount of the silica per 100 parts by weight of the carboxyl group-containing acrylic rubber is 25 to 100 parts by weight, and a total amount of the inorganic fibers per 100 parts by weight of the carboxyl group-containing acrylic rubber is 35 to 100 parts by weight. A sealing member includes a sliding portion composed of a vulcanized product of the seal rubber composition.Type: ApplicationFiled: September 20, 2022Publication date: May 25, 2023Applicants: KOYO SEALING TECHNO CO., LTD., JTEKT CORPORATIONInventors: Katsuhiko KUSUNOKI, Fumiaki KASAHARA
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Publication number: 20230159092Abstract: An ECU controls a motor including a first coil group and a second coil group. The ECU calculates a first torque command value and a second torque command value. The ECU uses a first differential torque, which is the difference between a first theoretical output torque and a first predictive output torque, to correct the second torque command value for the second coil group. The ECU uses a second differential torque, which is the difference between a second theoretical output torque and a second predictive output torque, to correct the first torque command value for the first coil group. The ECU uses a corrected first torque command value to control power feeding to the first coil group and uses a corrected second torque command value to control power feeding to the second coil group.Type: ApplicationFiled: April 27, 2020Publication date: May 25, 2023Applicants: JTEKT CORPORATION, JTEKT EUROPE S.A.S.Inventors: Yuji FUJITA, Hiroshi KAWAMURA, Tahar SLAMA, Baptiste HANSER, Laurent JANEL
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Patent number: 11654959Abstract: A method for estimating a value for friction exerted on a power steering system of a vehicle, during turning resulting in the crossing of a straight line angle, the turning being achieved at a substantially uniform speed included within a predefined range, and an angle of a steering wheel included within a predefined range, including: a step (1) of acquiring a plurality of vehicle-related data items, including at least one value of a force of a power steering motor on a rack and pinion, and a value of a force of the steering wheel on the rack and pinion; a step (4) of estimating the value for friction by averaging the sum of the forces of the steering wheel and the forces of the power steering motor on the rack and pinion.Type: GrantFiled: September 7, 2018Date of Patent: May 23, 2023Assignee: JTEKT EUROPEInventors: Alain Guilemond, Nicolas Baudouin
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Patent number: 11655857Abstract: A tripod constant-velocity joint including: an inner ring; three trunnions protruding from the inner ring; three roller units supported by the trunnions; and an outer ring storing the roller units. Each roller unit includes: an inner roller that is in contact with a convex outer-circumferential surface of the corresponding trunnion at a tangent point; an outer roller supported by the inner roller through rolling elements that are interposed between the inner and outer rollers; and a limiting portion protruding from the outer roller, so as to limit movements of the rolling elements and the inner roller. A clearance between the inner roller and the limiting portion is smaller than an axial length of a crowned end portion of each rolling element, and is larger than a stroke distance of reciprocating movement of the tangent point when a joint angle of the tripod constant-velocity joint is a predetermined value.Type: GrantFiled: May 15, 2020Date of Patent: May 23, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATIONInventors: Keishi Kobata, Yosei Ando
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Patent number: 11656137Abstract: A method in which a continuous estimation of the intermediate friction rate is carried out, allowing the integration of the method into a general friction compensation method so as to continuously improve the feel on the steering wheel, particularly for speeds below a determined threshold. Also, a method for friction compensation in an electrical power steering system, characterised in that the compensation method takes into account a continuous estimation of the intermediate friction rate obtained by the estimation method.Type: GrantFiled: October 23, 2018Date of Patent: May 23, 2023Assignee: JTEKT EUROPEInventors: Alain Guilemond, Sébastien Bourdrez, Tahar Slama, Pascal Moulaire, Nicolas Baudouin
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Publication number: 20230150451Abstract: A steering shaft is rotatably provided inside an outer column and an inner column. A key lock collar is mounted on an outer peripheral surface of the steering shaft, the outer peripheral surface facing the outer column. The key lock collar includes a key lock collar body and a cylindrical portion. Multiple concave parts and convex parts extending in the axial direction are provided on an outer peripheral part of the key lock collar body along the circumferential direction. A lock key is engaged with the concave parts from adjacent to the outer column, and thus the rotation of the steering shaft with respect to the outer column is restricted. An outer diameter of the cylindrical portion is smaller than an outer diameter of the convex parts and larger than an outer diameter of the concave parts.Type: ApplicationFiled: March 23, 2021Publication date: May 18, 2023Applicants: FUJI KIKO CO., LTD., JTEKT CORPORATIONInventors: Kazuki FUJIWARA, Takuya ADACHI, Masayoshi SAKUDA
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Patent number: 11649918Abstract: There is provided a flow pipe including: a pipe body including a side wall having an opening portion; and a heat insulator arranged at an inner peripheral side of the pipe body and having a flow path through which a fluid flows. The heat insulator has an outer peripheral surface facing with the side wall, and the outer peripheral surface has a flow path structure configured to form a flow path that guides a water droplet generated between the heat insulator and the pipe body to the opening portion.Type: GrantFiled: July 14, 2021Date of Patent: May 16, 2023Assignee: JTEKT CORPORATIONInventors: Kenichi Ryugo, Toshiyuki Saito, Motoo Nakai, Yoshiaki Ando
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Patent number: 11648979Abstract: A steering system installed on a vehicle, including: a steering mechanism including a steering member and configured to enable a wheel to be steered in accordance with a movement of the steering member; an operation assist device configured to apply a torque to a steering shaft for assisting an operation of a steering operation member; a steering assist device configured to assist the movement of the steering member utilizing a working fluid; and a controller configured to control a torque applied to the steering shaft by the operation assist device and control a supply flow rate of the working fluid, wherein the steering assist device assists the movement of the steering member with an assist force that depends on the supply flow rate, and the controller increases the supply flow rate when an operation speed of the steering operation member becomes equal to or higher than a set threshold speed.Type: GrantFiled: February 24, 2020Date of Patent: May 16, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CorporationInventors: Toshimasa Aoki, Shuji Fujita, Koki Sato, Hiroki Fukui, Tsuyoshi Ikeda
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Patent number: 11643134Abstract: A steering control system includes a central processing unit. The central processing unit calculates a plurality of types of axial forces acting on the turning shaft based on a state quantity. The central processing unit calculates a distributed axial force which is used to calculate the command value by summing the plurality of types of axial forces at predetermined distribution proportions. The central processing unit calculates the axial forces to have hysteresis with change of the state quantity. The hysteresis of each axial force is adjusted to approach hysteresis of one specific axial force out of the plurality of types of axial forces.Type: GrantFiled: August 20, 2020Date of Patent: May 9, 2023Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi Kodera, Yoshio Kudo
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Patent number: 11639191Abstract: 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: GrantFiled: January 22, 2021Date of Patent: May 2, 2023Assignee: JTEKT CORPORATIONInventors: Toshiaki Ogata, Fumio Kishida, Yoshio Kondo, Keishi Nakamura
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Publication number: 20230126878Abstract: A steering control device includes a controller configured to control driving of a motor that generates a torque. The torque is a torque applied to a steering mechanism of a vehicle using electric power from at least any one of an in-vehicle main power source and an auxiliary power source that backs up the main power source. The controller is configured to wait for the auxiliary power source to be charged to an extent that the main power source is able to be backed up and to permit the vehicle to travel when the controller is activated with an activation operation for the vehicle as a trigger and transitions to a state where control of the motor is executable.Type: ApplicationFiled: October 20, 2022Publication date: April 27, 2023Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi KOUDAI, Yuji FUJITA, Yugo NAGASHIMA, Yuuta KAJISAWA, Kazuma HASEGAWA, Yosuke YAMASHITA, Shintaro TAKAYAMA
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Publication number: 20230130446Abstract: A steer-by-wire steering system includes a controller configured to execute a steering control process and a determining process of determining a converted operation amount by converting an actual wheel steering amount to an operation amount of an operation member based on an inverse of a steering gear ratio. In the determining process, when the steering gear ratio abruptly changes, the controller converts a gap of the converted operation amount generated at a time point of occurrence of the abrupt change to a gap of the wheel steering amount to grasp a converted steering amount offset value. While gradually decreasing the converted steering amount offset value, the controller thereafter re-converts the converted steering amount offset value to the gap of the converted operation amount based on the inverse of the steering gear ratio to determine a converted operation amount correction value and corrects the converted operation amount based on the value.Type: ApplicationFiled: October 19, 2022Publication date: April 27, 2023Applicants: Toyota Jidosha Kabushiki Kaisha, JTEKT CORPORATIONInventors: Tomoyuki IIDA, Yuko Otsuka, Atsushi Ishihara, Junya Miyake
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Publication number: 20230125769Abstract: A control device includes control circuits of a plurality of systems. When a transition condition is established, the control circuits of the systems make transition of a driving mode from a first driving mode to a second driving mode, and when a return condition is established in a state in which the driving mode has transitioned to the second driving mode, the control circuits of the systems make transition of the driving mode from the second driving mode to the first driving mode while gradually changing the current command values of the control circuits’ own systems toward the current command values before the adjustment.Type: ApplicationFiled: October 24, 2022Publication date: April 27, 2023Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Kazuma HASEGAWA, Yuji FUJITA, Takashi KODERA, Isao NAMIKAWA, Atsushi ISHIHARA, Masaharu YAMASHITA, Kenji SHIBATA, Yuko GOTO, Hiroki TOMIZAWA, Nobuyori NAKAJIMA
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Publication number: 20230131995Abstract: A steering control device includes a controller including a drive circuit that performs action for supplying, to a motor, electric power supplied by being connected to at least one of a first and a second power supply. When a connection state of the drive circuit is a state in which electric power is supplied from the first power supply, the connection state is switched by a power supply device to transition to a second state in which electric power is supplied from the second power supply when an abnormality of the first power supply is detected. Moreover, the controller starts an output limiting process of limiting torque outputtable by the motor as compared with before the abnormality of the first power supply is detected, after the abnormality is detected and before switching of the connection state is completed.Type: ApplicationFiled: October 21, 2022Publication date: April 27, 2023Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Takashi KOUDAI, Yuji FUJITA, Yugo NAGASHIMA, Yuuta KAJISAWA, Kazuma HASEGAWA, Masaharu YAMASHITA, Yosuke YAMASHITA, Shintaro TAKAYAMA, Hiroki TOMIZAWA, Nobuyori NAKAJIMA
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Publication number: 20230130839Abstract: A steering control device includes a control circuit configured to control driving of a reaction force motor that generates steering reaction force applied to a steering wheel in which power transmission with turning wheels of a vehicle is separated. When a vehicle power source is turned on, the control circuit requests a vehicle control device to stop traveling of the vehicle when information is exchanged with the vehicle control device in a manner that does not follow a predetermined pattern.Type: ApplicationFiled: October 26, 2022Publication date: April 27, 2023Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Yugo NAGASHIMA, Yuji FUJITA, Yuuta KAJISAWA, Kazuma HASEGAWA, Takashi KOUDAI, Masaharu YAMASHITA, Yosuke YAMASHITA, Shintaro TAKAYAMA, Hiroki TOMIZAWA
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Patent number: 11633318Abstract: An assist device includes a first body-worn unit that is worn on at least shoulders or a chest of a user; a second body-worn unit that is worn on each of right and left legs or a waist of the user; a belt body provided to extend along a back side of the user, from the first body-worn unit to the second body-worn unit; an actuator provided in the first body-worn unit or the second body-worn unit and allows a part of the belt body to be reeled and unreeled; a battery configured to supply electricity to the actuator; and a controller configured to control the actuator. When a remaining charge level of the battery has decreased to a predetermined set value, the controller executes a vibrating motion process of causing the actuator to perform a vibrating motion of intermittently repeating reeling of a minute amount of the belt body.Type: GrantFiled: May 21, 2021Date of Patent: April 25, 2023Assignee: JTEKT CORPORATIONInventors: Hiromichi Ohta, Kazuyoshi Ohtsubo, Yoshitaka Yoshimi, Tomoki Arai
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Patent number: 11635135Abstract: A plug for closing an opening of a casing, the plug including a solid hub, with central axis, as well as a retaining member which ensures the axial attachment of the plug in the opening, the plug including a play-compensating carriage, which is distinct from the hub and which is movably mounted on a guiding support borne by the hub, the guiding support being arranged in such a way as to axially retain the carriage and to guide the relative movement of the carriage with respect to the hub in a direction termed the “play-compensating direction” transverse to the central axis, a spring-type resilient member, arranged between the guiding support and the carriage, and an orientating member arranged so as to orientate the plug, and consequently the play-compensating direction defined by the guiding support, in azimuth around the central axis, according to a predetermined orientation with respect to the casing.Type: GrantFiled: May 25, 2018Date of Patent: April 25, 2023Assignee: JTEKT EUROPEInventor: Mickael Guerin
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Publication number: 20230119506Abstract: 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: ApplicationFiled: October 14, 2022Publication date: April 20, 2023Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Kazuma HASEGAWA, Yuji FUJITA, Yugo NAGASHIMA, Masaharu YAMASHITA, Shintaro TAKAYAMA, Yosuke YAMASHITA, Hiroki TOMIZAWA, Nobuyori NAKAJIMA
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Publication number: 20230117373Abstract: A control device for a vehicle includes a plurality of control circuits configured to control a control object by starting in response to powering-on of a vehicle and to perform power latch control for continuing to be supplied with electric power in a predetermined period in response to powering-off of the vehicle. Each of the control circuits is configured to perform starting after all of the control circuits have recognized the powering-on of the vehicle in a case where the vehicle is powered on while the power latch control is being performed after the vehicle has been powered off.Type: ApplicationFiled: October 14, 2022Publication date: April 20, 2023Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Yugo NAGASHIMA, Yuji FUJITA, Kazuma HASEGAWA, Yuuta KAJISAWA, Takashi KOUDAI, Masaharu YAMASHITA, Yosuke YAMASHITA, Shintaro TAKAYAMA, Kazuaki IIDA, Hiroyuki KATAYAMA, Hiroki TOMIZAWA, Nobuyori NAKAJIMA