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公开(公告)号：US11987298B2
公开(公告)日：2024-05-21
申请号：US17657666
申请日：2022-04-01
发明人： Takuya Maegawa , Hiroki Tomizawa , Hiroyasu Otake , Yuuta Kajisawa , Yuji Fujita , Tokuaki Hibino , Yosuke Yamashita , Atsushi Satou , Masaharu Yamashita
IPC分类号： B62D5/04 , H02K7/00 , H02P21/00 , H02P21/22 , H02P27/08 , H02P27/12 , H02P29/024 , H02P29/028 , H02P29/032
CPC分类号： B62D5/0484 , B62D5/0424 , B62D5/046 , B62D5/0463 , B62D5/0496 , H02K7/003 , H02P21/0089 , H02P21/22 , H02P27/085 , H02P27/12 , H02P29/025 , H02P29/028 , H02P29/032 , B62D5/0481
摘要： A main power supply having a large capacity and a backup power supply having a small capacity are switchable by a power supply switching determination unit in a system. A motor control device drives a motor by the main power supply or the backup power supply. A drive control unit outputs a drive signal, calculated by feedback control of the current detection value with respect to the current command value, to an inverter circuit. When the power supply switching determination unit switches from the main power supply to the backup power supply, the drive control unit moves from a normal control using the main power supply to a backup control that restricts an electric power consumption and prevents the backup power supply from stopping.
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公开(公告)号：US20230234639A1
公开(公告)日：2023-07-27
申请号：US18156826
申请日：2023-01-19
发明人： Takashi Koudai , Yuji Fujita , Yugo Nagashima , Kazuma Hasegawa , Yuuta Kajisawa , Shintaro Takayama , Hiroyuki Katayama , Yosuke Yamashita , Masaharu Yamashita
摘要： A steering control device includes a control unit. The control unit is configured to execute a control angle calculation process, an angle feedback process, and a standard value adjustment process. The control angle calculation process is a process of calculating a control angle as an absolute angle relative to a standard value, and the angle feedback process is a process of performing feedback control on the control angle, and the standard value adjustment process is a process of adjusting the stored standard value. The standard value adjustment process includes a process of, when, in a straight-ahead state, the control angle deviates from a value showing the straight-ahead state, adjusting the standard value such that the deviation of the control angle from the value showing the straight-ahead state decreases.
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公开(公告)号：US11597434B2
公开(公告)日：2023-03-07
申请号：US16849114
申请日：2020-04-15
发明人： Masaharu Yamashita , Atsushi Sato , Masataka Okuda , Yosuke Yamashita , Shintaro Takayama , Shunsuke Hiromasa , Toshiyuki Mikida , Shoji Kubota , Yuji Fujita , Kenichi Abe , Toshimitsu Sakai
摘要： An actuator that applies force to a member associated with steering, and a control device that controls the actuator, have duplex configuration. First and second control devices compute the same controlled variable as first and second controlled variables, respectively. In a normal mode, the control device controls the actuator according to the first controlled variable. The first and second control devices send and receive respectively computed controlled variables to and from each other via communications. When a discrepancy arises between the first and second controlled variables, or an abnormality occurs in communications between the first and second control devices, the operating mode is switched from the normal mode to an independent mode. In the independent mode, the first and second control devices control the first and second actuators, according to the first and second controlled variables, respectively.
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公开(公告)号：US20220153343A1
公开(公告)日：2022-05-19
申请号：US17518766
申请日：2021-11-04
发明人： Tomoyuki IIDA , Masaharu Yamashita , Kenji Shibata , Yuji Fujita , Takashi Kodera , Isao Namikawa , Satoshi Matsuda
IPC分类号： B62D6/00
摘要： 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.
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公开(公告)号：US10124824B2
公开(公告)日：2018-11-13
申请号：US15409043
申请日：2017-01-18
摘要： The steering apparatus includes a first seal member and a second seal member. The first seal member is fixed to one of an outer peripheral surface of a rack shaft and an inner peripheral surface of a housing. The first seal member slidably contacts with a cylindrical surface which is centered on the axis and is provided on the other of the outer peripheral surface of the rack shaft and the inner peripheral surface of the housing. The second seal member is fixed to the other of the outer peripheral surface and the inner peripheral surface. The second seal member slidably contacts with a cylindrical surface which is centered on the axis and is provided on the one of the outer peripheral surface of the rack shaft and the inner peripheral surface of the housing.
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公开(公告)号：US12128964B2
公开(公告)日：2024-10-29
申请号：US17966043
申请日：2022-10-14
发明人： Kazuma Hasegawa , Yuji Fujita , Yugo Nagashima , Masaharu Yamashita , Shintaro Takayama , Yosuke Yamashita , Hiroki Tomizawa , Nobuyori Nakajima
CPC分类号： B62D5/006 , B62D5/0424 , B62D5/0463 , B62D5/0481
摘要： 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.
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公开(公告)号：US12116052B2
公开(公告)日：2024-10-15
申请号：US17662118
申请日：2022-05-05
发明人： Akira Takesaki , Hisashi Kameya , Hiroki Tomizawa , Masaharu Yamashita , Kenji Shibata , Yosuke Yamashita , Shintaro Takayama , Toshihiro Takahashi , Yuji Fujita , Kenichi Abe , Yugo Nagashima
CPC分类号： B62D5/0487 , B62D5/046 , B62D6/00
摘要： Control calculation units of a back system in each actuator operate by a collaborative drive mode in which a torque is output to a motor drive unit by using an information transmitted and received mutually by a communication between the systems in common. Cooperative control calculation units in a reaction force actuator and a turning actuator can operate in cooperation with each other based on the information transmitted and received mutually by a communication between actuators. A communication between adjacent systems and a communication between adjacent actuators are restored, when a focus control calculation unit is restored, after the focus control calculation unit is stopped during operation and at least one of the communication between adjacent systems or the communication between adjacent actuators is interrupted.
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公开(公告)号：US12049262B2
公开(公告)日：2024-07-30
申请号：US17852665
申请日：2022-06-29
发明人： Atsushi Satou , Yosuke Yamashita , Masaharu Yamashita , Toshihiro Takahashi , Tokuaki Hibino , Yuji Fujita , Yugo Nagashima , Kazuma Hasegawa , Yuuta Kajisawa , Kenichi Abe
IPC分类号： B62D5/00 , B60R16/033 , B62D5/04
CPC分类号： B62D5/003 , B60R16/033 , B62D5/0484
摘要： A steer-by-wire steering system, including a steering device including a dual-system steering motor including a main system and a sub system, wherein a power supply to the main system is conducted selectively by a main power source and a backup power source, and a power supply to the sub system is conducted by only the main power source, wherein, in a normal power-supply situation in which the power supply to the main system and to the sub system is conducted by the main power source, a controller controls the sub system to operate in accordance with the main system, and wherein, in a backup power-supply situation in which the power supply to the main system is conducted by the backup power source, the controller controls the main system not to operate or to operate while limiting the power supply to the main system and controls the sub system independently.
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公开(公告)号：US11973453B2
公开(公告)日：2024-04-30
申请号：US17660817
申请日：2022-04-26
发明人： Hiroki Tomizawa , Masaharu Yamashita , Kenji Shibata , Yosuke Yamashita , Shoji Kubota , Yugo Nagashima , Yuji Fujita , Kenichi Abe
摘要： A first actuator and a second actuator each have a plurality of control calculation units provided redundantly and a plurality of motor drive units provided redundantly. In the first and the second actuators, the control calculation units of the systems paired with each other transmit and receive information to and from each other by a communication between the actuators. When a failure occurs in any system in either of the two actuators, or when a failure occurs in a communication between actuators in either system, the control calculation unit of each actuator of the system in which the failure occurred stops the motor drive control. Then, the motor drive control is continued by the control calculation unit of the normal system in both actuators.
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公开(公告)号：US11840296B2
公开(公告)日：2023-12-12
申请号：US17481989
申请日：2021-09-22
发明人： Isao Namikawa , Satoshi Matsuda , Tomoyuki Iida , Yoshio Kudo , Masaharu Yamashita , Kenji Shibata
CPC分类号： B62D6/008 , B62D5/0463 , B62D6/002 , B62D6/08
摘要： A steering control device includes a control unit configured to control at least an operation of a steering-side motor. The control unit is configured to calculate a target reaction torque; calculate a difference axial force that is used to limit steering for turning the turning wheels in a predetermined direction, the difference axial force being reflected in the target reaction torque; and set a reference angle to one of a steering angle and a turning angle, set a converted angle to an angle obtained by converting another of the steering angle and the turning angle according to a steering angle ratio, and calculate the difference axial force based on a difference between the reference angle and the converted angle.
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