公开(公告)号：US20130340563A1

公开(公告)日：2013-12-26

申请号：US13920403

申请日：2013-06-18

Applicant: JTEKT CORPORATION

Inventor： Kosuke YAMANAKA ,  Masakazu FURUYOSHI ,  Toshiaki OYA

IPC: G05G5/08

CPC classification number: G05G5/08 ,  B62D7/148 ,  Y10T74/20672

Abstract: A rear wheel steering system includes a rack shaft, a neutral position locking apparatus that restricts the movement of the rack shaft in a rack axis direction, and a pin-driving device that drives a restriction pin. The neutral position locking apparatus has the restriction pin and a pin-receiving portion formed in the rack shaft. The restriction pin has a first pin-sidewall portion slanted with respect to a pin axis and a second pin-sidewall portion parallel to the pin axis. The pin-receiving portion has a first shaft-sidewall portion that contacts the first pin-sidewall portion when the position of the rack shaft in the rack axis direction is at a neutral position, and a second shaft-sidewall portion that contacts the second pin-sidewall portion when the position of the rack shaft in the rack axis direction is at a restriction position different from the neutral position.

Abstract translation: 后轮转向系统包括齿条轴，限制齿条轴在齿条轴线方向上的移动的中立位置锁定装置和驱动限制销的销钉驱动装置。 中立位置锁定装置具有限制销和形成在齿条轴中的销接收部分。 限制销具有相对于销轴倾斜的第一销侧壁部分和平行于销轴线的第二销侧壁部分。 销接收部具有当齿条轴在齿条轴方向的位置处于中立位置时与第一销侧壁部接触的第一轴侧壁部，以及与第二销侧壁部接触的第二轴侧壁部 当齿条轴在齿条轴线方向上的位置处于与中立位置不同的限制位置时的侧壁部分。

公开(公告)号：US20250058818A1

公开(公告)日：2025-02-20

申请号：US18719625

申请日：2022-01-20

Applicant: JTEKT CORPORATION

Inventor： Toshiaki OYA ,  Yoshinobu SHIMIZU

IPC: B62D5/00 ,  B62D1/12 ,  B62D6/00

Abstract: A steering control device is configured to calculate a reaction force command value to reflect a reaction force component calculated based on an operation amount of an operating lever, and generate a control signal based on the reaction force command value. The steering control device is configured to execute a keeping state determination process for determining whether a keeping condition for the operation amount is satisfied, and a calculation mode switching process for switching a calculation mode of the reaction force command value to a keeping state calculation mode when the keeping condition is satisfied. The keeping state calculation mode is configured such that a dead band that is a range in which the reaction force component does not change with respect to the operation amount is larger than a dead band in a normal state calculation mode.

公开(公告)号：US20170029013A1

公开(公告)日：2017-02-02

申请号：US15215761

申请日：2016-07-21

Applicant: JTEKT CORPORATION

Inventor： Toshiaki OYA

IPC: B62D5/04 ,  B62D6/00 ,  B62D15/02 ,  B62D5/00

CPC classification number: B62D15/027 ,  B62D5/006 ,  B62D15/0285

Abstract: In a vehicular steering system, a steering wheel (steering member) operated for steering and a steering operation mechanism are not mechanically coupled together, and the steering operation mechanism is driven by a steering operation motor. The vehicular steering system includes a reaction force motor that applies a reaction force to the steering member, and a reaction force motor control unit that controls the reaction force motor. The reaction force motor control unit includes a torque limiter that limits a current flowing through the reaction force motor to a predetermined value or smaller during automatic operation.

Abstract translation: 在车辆转向系统中，用于转向操作的方向盘（转向构件）和转向操作机构没有机械地联接在一起，并且转向操作机构由转向操作电动机驱动。 车辆转向系统包括向转向构件施加反作用力的反作用力马达和控制反作用力马达的反作用马达控制单元。 反作用力马达控制单元包括在自动运行期间将流过反作用力马达的电流限制在预定值或更小的扭矩限制器。

公开(公告)号：US20160347355A1

公开(公告)日：2016-12-01

申请号：US15158066

申请日：2016-05-18

Applicant: JTEKT CORPORATION

Inventor： Toshiaki OYA

IPC: B62D5/04

CPC classification number: B62D5/046 ,  B62D1/286 ,  B62D15/025

Abstract: In a steering assist device, a main lane keep assist current value setting unit sets a main lane keep assist current value that generates main lane keep assist torque according to a lateral deviation and a lateral deviation change rate. A sub lane keep assist current value setting unit sets a sub lane keep assist current value that generates sub lane keep assist torque according to curvature ct of a target travel line.

Abstract translation: 在转向辅助装置中，主车道保持辅助电流值设定部根据横向偏差和横向偏差变化率设定主车道保持辅助转矩的主车道保持辅助电流值。 辅助通道保持辅助电流值设定单元设定根据目标行驶线的曲率ct产生副车道保持辅助转矩的副车道保持辅助电流值。

公开(公告)号：US20250050945A1

公开(公告)日：2025-02-13

申请号：US18716713

申请日：2022-01-27

Applicant: JTEKT CORPORATION

Inventor： Toshiaki OYA ,  Yoshinobu SHIMIZU

IPC: B62D15/02 ,  B62D6/00

Abstract: A steering control device includes an emergency determination unit configured to determine whether or not an emergency exists in which an emergency avoidance operation is to be performed, and a work adjustment unit configured to adjust work of a driver required to steer steered wheels. The work adjustment unit is configured to execute emergency adjustment processing for adjusting the work in accordance with a determination result of whether or not an emergency exists. The emergency adjustment processing includes reduction processing for reducing the work in an initial stage after the emergency determination unit determines that an emergency exists, as compared in a case in which determination is not made that an emergency exists.

公开(公告)号：US20240416995A1

公开(公告)日：2024-12-19

申请号：US18701658

申请日：2021-11-17

Applicant: JTEKT CORPORATION

Inventor： Toshiaki OYA ,  Yoshinobu SHIMIZU

IPC: B62D6/00 ,  B62D5/04

Abstract: A steering control device includes a target steering corresponding value computing unit configured to compute a target steering corresponding value. The target steering corresponding value computing unit is configured to execute low sensitivity determination processing for determining whether or not a low sensitivity condition for reducing an amount of change in the steered angle with respect to an amount of change in an amount of operation of an operating lever is satisfied, normal computation processing for computing the target steering corresponding value based on the amount of operation when the low sensitivity condition is not satisfied, and low sensitivity computation processing for computing, based on the amount of operation, the target steering corresponding value having a smaller absolute value than the target steering corresponding value computed by the normal computation processing, when the low sensitivity condition is satisfied.

公开(公告)号：US20230026250A1

公开(公告)日：2023-01-26

申请号：US17868529

申请日：2022-07-19

Applicant: JTEKT CORPORATION

Inventor： Yuuta KAJISAWA ,  Yuji FUJITA ,  Kenichi ABE ,  Toshihiro TAKAHASHI ,  Toshiaki OYA ,  Yoshinobu SHIMIZU ,  Masahiko SAKAMAKI ,  Shintaro TAKAYAMA ,  Yosuke YAMASHITA ,  Masaharu YAMASHITA

IPC: B62D5/00 ,  B60R25/021 ,  B60R25/0215 ,  B62D5/04

Abstract: A steering system is configured such that electric power is supplied to a steering actuator and a turning actuator from a first power supply when a power state of a vehicle is an on state and supply of the electric power from the first power supply is cut off when the power state is an off state. The steering system includes a rotation curbing unit configured to operate such that rotation of the steering wheel is curbed in at least a part of a first power-off period from when the power state becomes an off state until when the power state becomes the on state next, as an operating period, and a second power supply configured to supply, to the rotation curbing unit, the electric power required for operation of the rotation curbing unit in the operating period, the second power supply being different from the first power supply.

公开(公告)号：US20160362136A1

公开(公告)日：2016-12-15

申请号：US15176843

申请日：2016-06-08

Applicant: JTEKT CORPORATION

Inventor： Toshiaki OYA

IPC: B62D15/02 ,  B60R1/00 ,  B62D5/04

CPC classification number: B62D15/025 ,  B60R1/00 ,  B62D5/0409 ,  B62D5/0454 ,  B62D5/0463

Abstract: In a steering assist device, a correction gain setting unit sets correction gain to one if it determines that that the sign of a lateral deviation change rate is different from that of a second derivative value of a lateral deviation. The correction gain setting unit sets the correction gain to a predetermined value that is larger than one, if it determines that that the sign of the lateral deviation change rate is the same as that of the second derivative value of the lateral deviation.A gain multiplication unit corrects a lane keep assist current value calculated by a lane keep assist current value calculation unit by multiplying the lane keep assist current value by the correction gain set by the correction gain setting unit.

Abstract translation: 增益乘法单元通过将车道保持辅助电流值乘以由校正增益设定单元设定的校正增益来校正由车道保持辅助电流值计算单元计算出的车道保持辅助电流值。

公开(公告)号：US20180099692A1

公开(公告)日：2018-04-12

申请号：US15723644

申请日：2017-10-03

Applicant: JTEKT CORPORATION

Inventor： Toshiaki OYA

IPC: B62D6/00 ,  B62D5/04 ,  B62D6/02 ,  B62D15/02

CPC classification number: B62D6/003 ,  B62D5/006 ,  B62D5/0418 ,  B62D5/046 ,  B62D6/006 ,  B62D6/02 ,  B62D15/021 ,  B62D15/025

Abstract: A second target steered angle setter includes: a first multiplier configured to, when the vehicle is making a right turn, reduce a base target steered angle correction amount so as to set the reduced base target steered angle correction amount to be a left target steered angle correction amount, and configured to, in other states, set the base target steered angle correction amount to be the left target steered angle correction amount on an as-is basis; and a second multiplier configured to, when the vehicle is making a left turn, reduce the base target steered angle correction amount so as to set the reduced base target steered angle correction amount to be a right target steered angle correction amount, and configured to, in other states, set the base target steered angle correction amount to be the right target steered angle correction amount on an as-is basis.

公开(公告)号：US20180099690A1

公开(公告)日：2018-04-12

申请号：US15717360

申请日：2017-09-27

Applicant: JTEKT CORPORATION

Inventor： Toshiaki OYA

IPC: B62D5/04 ,  B62D6/00

CPC classification number: B62D5/0418 ,  B62D5/001 ,  B62D5/0463 ,  B62D5/0466 ,  B62D6/002

Abstract: A left steering ECU includes switching control unit that switches control mode between a first control mode and a second control mode. The first control mode is mode in which the left steering ECU controls left steering motor so that the steered angle of a left steered wheel becomes equal to a left target steered angle received from a higher-level control device. The second control mode is a mode in which the left steering ECU controls the left steering motor by torque feedback control so that the steered angle of the left steered wheel becomes equal to an angle corresponding to a neutral position of the left steered wheel. The switching control unit normally sets the control mode to the first control mode. The switching control unit switches the control mode to the second control mode if abnormal communication occurs between the higher-level control device and the left steering ECU.