Patents Assigned to JTEKT
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Publication number: 20220221004Abstract: A lubricant supply device includes a porous body including a first porous portion and a second porous portion in contact with the first porous portion, the porous body being impregnated with a lubricant. A penetration depth of the lubricant in the second porous portion is larger than a penetration depth of the lubricant in the first porous portion.Type: ApplicationFiled: December 30, 2021Publication date: July 14, 2022Applicant: JTEKT CORPORATIONInventor: Toru KAMIYA
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Patent number: 11383763Abstract: A method for a power steering system of a motor vehicle delivering, to the steering, a torque controlled by a computer for compensating for trajectory deviation of the vehicle when this vehicle is braking, which, from a request to activate the method while braking, in a first step, calculates a rough correction torque taking into account the speed of the vehicle, the yaw of this vehicle, and a signal representing the force applied by the steering to the steered wheels.Type: GrantFiled: January 7, 2019Date of Patent: July 12, 2022Assignee: JTEKT EUROPEInventor: Luc Leydier
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Patent number: 11387760Abstract: A motor control device includes: a second setting unit configured to set an armature current command value and a current phase angle command value based on a rotation speed and a motor torque command value; and a current vector setting unit configured to set a d-axis current command value and a q-axis current command value based on the armature current command value and the current phase angle command value. The second setting unit is configured to set the armature current command value and the current phase angle command value such that an armature current vector which is set based on the d-axis current command value and the q-axis current command value is included in an area surrounded by an armature current vector locus in maximum torque/current control and a vertical axis in a d-q coordinate system.Type: GrantFiled: June 4, 2021Date of Patent: July 12, 2022Assignee: JTEKT CORPORATIONInventor: Yuta Iwai
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Patent number: 11383759Abstract: A manual steering command value generation unit generates a manual steering command value, using a steering torque. A summed angle command value calculation unit calculates a summed angle command value, by adding the manual steering command value to an automatic steering command value. A control unit performs angle control of an electric motor, based on the summed angle command value. The control unit includes a basic torque command value calculation unit that calculates a basic torque command value, a disturbance torque estimation unit that estimates a disturbance torque other than a motor torque of the electric motor applied to an object driven by the electric motor, and a disturbance torque compensation unit that corrects the basic torque command value, based on the disturbance torque. The manual steering command value generation unit uses an estimated torque calculated based on the disturbance torque, when generating the manual steering command value.Type: GrantFiled: July 25, 2019Date of Patent: July 12, 2022Assignee: JTEKT CORPORATIONInventor: Naoki Shoji
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Patent number: 11383761Abstract: A power steering system including a steering wheel, a return function to automatically return the steering wheel to a given reference position, and includes a function for calculating a return-speed setpoint which calculates a steering wheel speed setpoint from the steering wheel position error differentiating between the effective instantaneous position of the steering wheel and the reference position, then a function for calculating the return assistance, defining from the steering wheel speed error which is the difference between the effective speed of the steering wheel and the steering wheel speed setpoint, a return assistance setpoint, the system including a dynamic saturation function defining at least one saturation threshold, that the dynamic saturation function sets according to the value of the steering wheel speed setpoint, and the dynamic saturation function applies to clip the peaks of the return assistance setpoint calculation to confine the return assistance setpoint to an authorized domain.Type: GrantFiled: January 4, 2019Date of Patent: July 12, 2022Assignee: JTEKT EUROPEInventors: Dimitri Barthes, Pascal Moulaire, Julien Ponte
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Patent number: 11383760Abstract: A steering system includes: a steering member; a steering operation mechanism; a reaction force motor; a steering motor; a steering torque sensor; a command value setting circuit; a reaction force command value calculation circuit configured to calculate a reaction force command value; a steering operation command value calculation circuit configured to calculate a steering operation command value based on a steering operation steering angle command value and a manual steering angle command value; a reaction force control circuit configured to cause a rotation angle of the reaction force motor to follow the reaction force command value; and a steered angle control circuit configured to cause a rotation angle of the steering motor to follow the steering operation command value.Type: GrantFiled: February 10, 2020Date of Patent: July 12, 2022Assignee: JTEKT CORPORATIONInventors: Tomohiro Nakade, Yuta Sakai, Robert Fuchs, Naoki Shoji
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Patent number: 11383754Abstract: 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: GrantFiled: February 10, 2021Date of Patent: July 12, 2022Assignee: JTEKT CORPORATIONInventors: Susumu Imagaki, Masayoshi Sakuda, Kota Higuchi, Kazuki Fujiwara, Kenji Utsunomiya, Takuya Adachi
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Patent number: 11383313Abstract: A machine tool includes a workpiece holder, a tool holder holding working tools that includes a hob cutter used in a rough machining and a skiving cutter used in a finish machining, a tool magazine, a tool replacing device replacing one of the working tools mounted on the tool holder with the other of working tools housed in the tool magazine, a rough machining controlling section performing the rough machining on the workpiece, a tool measuring device measuring a position of a blade in a rotation direction of the skiving cutter, an angle correcting section correcting a rotation angle of the skiving cutter based on a result measured by the tool measuring device, and placing a tooth space formed in the workpiece and an edge tip of the blade in a position corresponding to each other, and a finish machining controlling section by which workpiece is finish machined.Type: GrantFiled: October 30, 2019Date of Patent: July 12, 2022Assignee: JTEKT CorporationInventors: Kazuki Natsuda, Kento Takeuchi, Hisashi Otani, Hiroyuki Nakano
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Patent number: 11377134Abstract: A steering device includes: a first moving unit that moves in an axial direction along with a shaft member to which an operating member is connected; a second moving unit; a holding unit; a first screw mechanism; a second screw mechanism; a driving unit; and a transmission mechanism that transmits driving force of the driving unit to the first screw mechanism and the second screw mechanism. One of the first screw mechanism and the second screw mechanism is provided so as to operate in a forward direction when the operating member moves between a retraction region and an operation region, and reverse efficiency of that one screw mechanism is set such that when the operating member is subjected to an external force directed toward the retraction region, that one screw mechanism does not operate in a reverse direction.Type: GrantFiled: April 13, 2021Date of Patent: July 5, 2022Assignee: JTEKT CORPORATIONInventors: Takeshi Watanabe, Kunihiro Oka, Yasuyuki Nozawa, Kei Kitahara
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Publication number: 20220205857Abstract: A sensor device includes a main driving gear, driven gears, an biasing member configured to bias the driven gears toward the main driving gear, a support member configured to support the biasing member, and a sensor configured to generate an electrical signal based on rotation of the driven gears. In a force applied when the biasing member biases the driven gears, assuming that a direction orthogonal to a tangent line at a point of action of the force is set as a first direction, the first direction is different from a second direction.Type: ApplicationFiled: December 21, 2021Publication date: June 30, 2022Applicant: JTEKT CORPORATIONInventors: Yuichi TOYAMA, Toshiaki MURAKAMI
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Publication number: 20220204074Abstract: A method for modulating an assistance function application of an assisted steering system in a vehicle, the vehicle including at least two wheels, a steering wheel and an assistance motor applying an assistance torque on a rack, the method implementing a step of evaluating an application gain of the assistance function, a step of estimating the assistance torque associated with the assistance function and a step of multiplying the assistance torque associated with the assistance function and the application gain, characterised in that the step of evaluating the application gain includes a first phase of determining a first gain depending on a yaw speed and an angle of the steering wheel.Type: ApplicationFiled: July 9, 2019Publication date: June 30, 2022Applicant: JTEKT EUROPEInventors: André MICHELIS, Luc LEYDIER
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Patent number: 11370474Abstract: Steering column for a motor vehicle including two telescopic drive shafts linked in rotation, allowing an axial sliding of a front shaft supporting a steering wheel, successively over, starting from the most forward position, a first range of depth adjustment of the position of this steering wheel, then a second damping range used in the case of an accident for damping an impact of the driver on the steering wheel, this column including an electric motorization for controlling the sliding, and an anti-theft blocking device blocking the rotation of one of the shafts, which is automatically engaged for an axial position for blocking the front shaft given by the motorization located in the second damping range.Type: GrantFiled: March 13, 2019Date of Patent: June 28, 2022Assignee: JTEKT EUROPEInventor: Laurent Rey
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Patent number: 11371568Abstract: A driving force transmission device includes an input rotation member and output rotation member, a multiple-disc clutch, a pressing mechanism, and a control device that includes a current supply circuit. The control device is configured to compute a torque command value based on a state of a vehicle, the torque command value being a driving force that needs to be transmitted by the multiple-disc clutch, to compute a current command value, to correct the current command value, and to control the current supply circuit such that an electric current depending on the current command value is supplied to the pressing mechanism. The control device is configured to perform the correction so as to increase or decrease the current command value by a correction amount depending on a change rate of the torque command value.Type: GrantFiled: November 23, 2020Date of Patent: June 28, 2022Assignee: JTEKT CORPORATIONInventors: Ichiro Oda, Go Nagayama, Tomonori Ono, Takashi Kouzai
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Publication number: 20220194463Abstract: Method for controlling a control motor, including an engine and an engine arranged in parallel, implementing: a distribution step determining a distributed torque, and a distributed torque from a target torque; a step adding a compensation request to the first distributed torque so as to determine a target motor torque; a step adding a compensation request to the distributed torque so as to determine a target motor torque; a production step in which the engine exerts a motor torque depending on the target motor torque; a step in which the engine exerts a motor torque depending on the target motor torque; the controlling method also including a permission step, configured to limit, or respectively authorize, the compensation request of a disturbance, or respectively of a failure, of the engine, and/or the compensation request, for a disturbance, or respectively a failure, of the engine.Type: ApplicationFiled: December 23, 2021Publication date: June 23, 2022Applicant: JTEKT EUROPEInventors: Xavier PALANDRE, Tahar SLAMA
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Publication number: 20220197245Abstract: A cyber-physical system type machining system includes: a machine tool disposed in a real world and including a machine body and a control device; and a computer device connected to communicate with the control device and including a processor and a memory storing a program for generating, in a virtual world, a virtual machining phenomenon corresponding to an actual machining phenomenon with regard to a workpiece and the machine body. The program, when executed by the processor, causes the computer device to perform: acquiring a command value in synchronization with the control device, the command value for controlling the machine body by the control device; generating a future virtual machining phenomenon, which is the virtual machining phenomenon in a future, based on the command value; and outputting, to the control device, an optimal command value for correcting the command value based on the future virtual machining phenomenon.Type: ApplicationFiled: April 20, 2020Publication date: June 23, 2022Applicant: JTEKT CORPORATIONInventors: Yoshio WAKAZONO, Shinji MURAKAMI
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Publication number: 20220183473Abstract: An attachment for oscillating a bed and a bed oscillating device including a support portion supporting the bed and a driving unit that linearly reciprocates the support portion such that the bed is oscillated. A conversion mechanism of the driving unit is a screw device including a screw shaft, a nut, a plurality of balls, and a circulation member that endlessly circulates the plurality of balls between a first spiral groove of the screw shaft and a second spiral groove of the nut. One of the screw shaft and the nut includes a rotating member configured to rotate in accordance with the rotational motion of the motor, and the other of the screw shaft and the nut includes a reciprocating member configured to be linearly reciprocated via the balls in accordance a rotation of the rotating member.Type: ApplicationFiled: March 9, 2020Publication date: June 16, 2022Applicant: JTEKT CORPORATIONInventors: Hiroshi SUMASU, Takahito HIEDA
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Publication number: 20220186848Abstract: A pressure reducing valve includes: a body, a valve seat, and a valve element opening and closing the valve seat according to a difference between a pressure on the inlet side and a pressure on the outlet side. A pressure chamber, which is a space part between the valve element and the valve seat, is provided on the inlet side of the valve element. The valve element includes a plurality of horizontal holes each opening to the pressure chamber, and a vertical hole bringing the horizontal holes and the outlet side of the valve element into communication with each other. The horizontal holes and the vertical hole are provided in such a manner that a value of a ratio of a flow channel area of the vertical hole to a total area that is a total of flow channel areas of the horizontal holes exceeds 1.16.Type: ApplicationFiled: November 29, 2021Publication date: June 16, 2022Applicant: JTEKT CORPORATIONInventors: Kazushi NUMAZAKI, Tetsuya KANEKO, Akira NAKANO, Kazuhiro TAKABAYASHI, Kazuo HANEDA, Yuya KIHARA
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Publication number: 20220185367Abstract: A steering control device includes a first calculator configured to calculate a first axial force, a second calculator, and a third calculator configured to calculate a third axial force. The third calculator is configured to, when a specific situation occurs in which a current of a turning motor has to be limited, decrease a reflection degree of the first axial force in the third axial force and increase a reflection degree of the second axial force in the third axial force.Type: ApplicationFiled: December 9, 2021Publication date: June 16, 2022Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Isao NAMIKAWA, Satoshi MATSUDA, Tomoyuki IIDA, Masaharu YAMASHITA, Kenji SHIBATA
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Patent number: 11359740Abstract: An electromagnetic valve includes a sleeve having a valve hole at a central portion thereof, a spool, and an electromagnetic solenoid. The sleeve has plural ports penetrating the sleeve between inner and outer peripheral surfaces thereof and disposed side by side in a central axis direction of the valve hole. In the spool, plural lands having an outer peripheral surface facing an inner peripheral surface of the valve hole are provided side by side in the central axis direction. The electromagnetic solenoid is configured to move the spool in the central axis direction in the valve hole. The ports have one or plural recessed portions in which working oil is stored. When the spool is decentered with respect to the sleeve, a pressure of the working oil stored is increased.Type: GrantFiled: July 27, 2020Date of Patent: June 14, 2022Assignee: JTEKT CORPORATIONInventors: Kaori Fujita, Toshihiko Shima, Teppei Morita, Toshio Murakami, Shungo Kamigaichi, Tomohiro Shiromaru
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Patent number: 11363716Abstract: Provided is a control device and a motor device that can effectively suppress influence of vibration of a specific electronic component. A coil that is the specific electronic component is mounted on a circuit board. A connector portion has a base portion extending in a thickness direction of the circuit board and an extended portion extending from the base portion in a direction in which the circuit board extends. The extended portion of the connector portion has an annular portion, a support portion, and a pedestal portion. The pedestal portion serves as a portion to which the coil is bonded and fixed. With an adhesive applied to the pedestal portion, the pedestal portion bonds and fixes the coil thereto.Type: GrantFiled: November 1, 2019Date of Patent: June 14, 2022Assignee: JTEKT CORPORATIONInventors: Tomohiro Higashide, Takaya Tanikawa, Naotake Kanda