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公开(公告)号：US12030559B2
公开(公告)日：2024-07-09
申请号：US17346796
申请日：2021-06-14
CPC分类号： B62D5/0463 , B62D15/021
摘要： A steering system includes a steering shaft that rotates along with an operation of a steering wheel; a motor configured to generate a torque that is applied to the steering shaft; and a control unit configured to control the motor. The control unit is configured to control the motor such that a rotation speed of the steering wheel decreases gradually to zero when automatic rotation of the steering wheel is stopped, in a case where the steering wheel is automatically rotated as an adjustment process of adjusting a rotational position of the steering wheel.
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公开(公告)号：US11485404B2
公开(公告)日：2022-11-01
申请号：US16821665
申请日：2020-03-17
发明人： Koji Anraku , Isao Namikawa , Yusuke Kakimoto , Yoshio Kudo , Tetsuya Morino
摘要： In a controller for a steering device, the steering device includes a structure where motive power transmission between a steering unit and a turning unit is separated. The controller includes a control circuit configured to control operation of a steering-side motor that is provided in the steering unit to give steering reaction force that is force against the steering input into the steering unit. In a case where turning of the turning wheels to one direction is restricted, the control circuit is configured to calculate restriction reaction force for restricting steering that is to turn the turning wheels to the one direction. The control circuit is configured to calculate the restriction reaction force based on information on the steering unit.
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公开(公告)号：US12049263B2
公开(公告)日：2024-07-30
申请号：US17861619
申请日：2022-07-11
CPC分类号： B62D5/0463 , B62D6/002 , B62D6/008
摘要： A steering control device includes a control unit configured to perform a calculation based on angle information and to control the operation of a turning section based on a turning control amount. The angle information is obtained by relating the turning control amount for operating the turning section to a steering angle that is an angle by which a steering wheel is steered. The control unit includes a speed increase ratio calculation unit configured to calculate a speed increase ratio based on state variables, and an angle information calculation unit configured to calculate the angle information by converting the steering angle using the speed increase ratio obtained by the speed increase ratio calculation unit.
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公开(公告)号：US11834115B2
公开(公告)日：2023-12-05
申请号：US17347142
申请日：2021-06-14
CPC分类号： B62D6/008 , B62D5/006 , B62D5/0481
摘要： A steering system includes a steering shaft; a reaction motor; and a control unit configured to control the reaction motor. The control unit has a function of performing a correction process of rotating the steering wheel using the reaction motor such that a displacement in a rotational position of the steering wheel with respect to a correct rotational position corresponding to a turning position of the turning wheels decreases when a power supply of the vehicle is turned on and the rotational position of the steering wheel is different from the correct rotational position. The control unit is configured to perform the correction process when the displacement is equal to or greater than a predetermined permissible value and not to perform the correction process when the displacement is less than the permissible value.
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公开(公告)号：US12030560B2
公开(公告)日：2024-07-09
申请号：US17483972
申请日：2021-09-24
发明人： Yusuke Kakimoto , Takashi Kodera , Yoshio Kudo
CPC分类号： B62D5/0463 , B62D6/00
摘要： A steering control device includes a target torque generator configured to generate a target torque which is a target value of the motor torque and a control signal generator configured to generate a control signal for controlling the motor such that the motor torque corresponding to the target torque is generated. The target torque generator includes a pre-adjustment axial force calculator, a first axial force calculator, a second axial force calculator, a post-adjustment axial force calculator, and a target torque calculator. The post-adjustment axial force calculator is configured to set a proportion of a first axial force contributing to a post-adjustment axial force to be smaller when a state of a vehicle speed is abnormal than when the state of the vehicle speed is normal.
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公开(公告)号：US11661107B2
公开(公告)日：2023-05-30
申请号：US17218957
申请日：2021-03-31
申请人： JTEKT CORPORATION
发明人： Yoshiyuki Uchino , Yusuke Kakimoto , Koji Anraku , Isao Namikawa , Kenji Shibata , Takafumi Sato
摘要： A steering control device includes control circuitry configured to perform synchronization control. The synchronization control includes a target synchronization angle calculating process of calculating a target synchronization angle that is a steering-side rotation angle satisfying a predetermined correspondence relationship with respect to a turning-side rotation angle; a target relay angle calculating process of calculating a target relay angle that is located closer to a first side in a circumferential direction than a first-side angle is, the first-side angle being one of the steering-side rotation angle and the target synchronization angle and being located closer to the first side than another of the steering-side rotation angle and the target synchronization angle is; and a motor driving process of operating a steering-side motor such that the steering-side rotation angle reaches the target synchronization angle after operating the steering-side motor such that the steering-side rotation angle reaches the target relay angle.
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公开(公告)号：US11325642B2
公开(公告)日：2022-05-10
申请号：US16825328
申请日：2020-03-20
申请人： JTEKT CORPORATION
发明人： Isao Namikawa , Koji Anraku , Yusuke Kakimoto
摘要： A steering apparatus includes: a mechanism that turns a turning wheel; a first motor that generates a driving force that is given to the mechanism; and a control device. The control device includes: a first computation circuit that computes a first limiting value to which an electric current to be supplied to the first motor is limited in a particular situation; a determination circuit that determines whether the turning wheel is in touch with an obstacle; a second computation circuit that computes a second limiting value to which the electric current to be supplied to the first motor is limited when the determination circuit determines that the turning wheel is in touch with the obstacle; and a third computation circuit that computes the threshold to be used by the determination circuit, based on a smaller limiting value of the first limiting value and the second limiting value.
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公开(公告)号：US11840295B2
公开(公告)日：2023-12-12
申请号：US17346476
申请日：2021-06-14
CPC分类号： B62D6/008 , B62D5/006 , B62D5/0466
摘要： A steering system includes a steering shaft; a motor configured to generate a torque applied to the steering shaft; and a control unit configured to control the motor. The control unit has a function of performing steering angle feedback control for causing a steering angle that is a rotation angle of a steering wheel to reach a target steering angle that is set based on a point of view of adjusting a rotational position of the steering wheel, as an adjustment process of adjusting the rotational position of the steering wheel. The control unit is configured to set a limit value for limiting a change range of the target steering angle with respect to the steering angle at each moment in a period in which automatic rotation of the steering wheel is hindered in a case where the automatic rotation is hindered while the adjustment process is being performed.
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公开(公告)号：US11661103B2
公开(公告)日：2023-05-30
申请号：US16801867
申请日：2020-02-26
发明人： Takashi Kodera , Isao Namikawa , Yusuke Kakimoto , Yoshio Kudo
CPC分类号： B62D5/0463 , B62D5/0424 , B62D5/006
摘要： A steering control device for a steering system includes an electronic control unit configured to: calculate target torque that is a target value of the motor torque; control operation of the motor; calculate a vehicle speed basic axial force based on a detected vehicle speed; calculate another state quantity basic axial force based on a state quantity other than the detected vehicle speed; calculate a distributed axial force by adding the vehicle speed basic axial force and the other state quantity basic axial force at individually set distribution ratios; calculate the target torque based on the distributed axial force; and reduce the distribution ratio of the vehicle speed basic axial force when the detected vehicle speed is abnormal as compared to when the detected vehicle speed is normal.
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公开(公告)号：US11292510B2
公开(公告)日：2022-04-05
申请号：US16790514
申请日：2020-02-13
发明人： Koji Anraku , Isao Namikawa , Yusuke Kakimoto , Yoshio Kudo
摘要： A steering control device includes an electronic control unit. The electronic control unit controls operation of a steering-side motor so as to apply a steering reaction force that resists a steering operation input to the steering wheel. The electronic control unit computes an obstruction strike reaction force for regulating a steering operation that steers a steered wheel toward an obstruction. The electronic control unit generates determination information indicating that the steered wheel is struck by an obstruction. The determination information includes first determination information indicating that the left side of the steered wheel is struck by an obstruction, and second determination information indicating that the right side of the steered wheel is struck by an obstruction. The electronic control unit sets a direction in which the obstruction strike reaction force is applied based on the generated determination information.
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