公开(公告)号：US20180346018A1

公开(公告)日：2018-12-06

申请号：US15989568

申请日：2018-05-25

申请人： JTEKT CORPORATION

发明人： Nobuaki KATAOKA ,  Shingo MAEDA ,  Jun HASEGAWA ,  Masayuki KITA ,  Takahiro TOKO

IPC分类号： B62D6/00 ,  B62D5/04

CPC分类号： B62D5/0457 ,  B62D5/0469 ,  B62D15/0235 ,  B62D15/0245

摘要： A control steered angle calculation unit includes: an end position determination unit that determines whether a rack shaft is located at either one of right and left rack end positions; a motor absolute angle calculation unit that detects a motor absolute angle; an end position-corresponding motor angle setting unit that, when the rack shaft is determined to be located at either one of the right and left rack end positions, sets the detected motor absolute angle as an end position-corresponding motor angle corresponding to the one of the right and left rack end positions; and a control steered angle origin setting unit that calculates an average value of right and left end position-corresponding motor angles as an offset angle, and sets an angle obtained by subtracting the offset angle from the detected motor absolute angle as an origin of the control steered angle represented by the motor ab solute angle.

公开(公告)号：US20150251691A1

公开(公告)日：2015-09-10

申请号：US14633755

申请日：2015-02-27

申请人： JTEKT CORPORATION

发明人： Terutaka TAMAIZUMI ,  Hirozumi EKI ,  Masayuki KITA ,  Isao NAMIKAWA ,  Akihiko NISHIMURA ,  Jun HASEGAWA

IPC分类号： B62D5/04

CPC分类号： B62D5/0412 ,  B62D5/0472 ,  B62D6/008

摘要： A control device in an electric power steering device calculates a first assist component based on steering torque and a vehicle speed. The control device also calculates a compensation component associated with an reverse input and calculates a steered angle command value based on an addition value of the compensation component and basic drive torque that is an addition value of the steering torque and the first assist component, produces a second assist component by performing steered angle feedback control that causes the steered angle of a vehicle to follow the steered angle command value. The control device controls drive of a motor based on an assist command value that is an addition value of the first assist component and the second assist component.

摘要翻译： 电动助力转向装置中的控制装置基于转向转矩和车速计算第一辅助部件。 控制装置还计算与反向输入相关联的补偿分量，并且基于补偿分量的相加值和作为转向转矩和第一辅助分量的相加值的基本驱动转矩来计算转向角度指令值， 第二辅助部件通过执行导致车辆的转向角度跟随转向角度指令值的转向角度反馈控制。 控制装置基于作为第一辅助部件和第二辅助部件的相加值的辅助指令值来控制电动机的驱动。

公开(公告)号：US20180057047A1

公开(公告)日：2018-03-01

申请号：US15674674

申请日：2017-08-11

申请人： JTEKT CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

发明人： Takahiro TOKO ,  Hiromasa TAMAKI ,  Jun HASEGAWA ,  Shohei FUJITA ,  Kohei YANAI ,  Tatsuya SUZUKI ,  Tatsuya MIYAKE ,  Takashi SUZUKI

IPC分类号： B62D6/00 ,  B62D5/04 ,  B62D5/00 ,  G01L5/22 ,  G01P1/02

摘要： A steering control device includes a command value setting processing portion configured to set a current command value based on a detection value of steering torque; a feedback processing portion configured to control a voltage applied to a motor so as to control a current flowing through the motor to the current command value, based on an output value of an integral element obtained by using a difference between the current and the current command value; an end determination processing portion configured to determine whether a turning angle of steered wheels has reached a limit angle; and an end-time limit processing portion configured to perform correction to increase a magnitude of the difference, based on a degree of a decrease in a magnitude of a rotational speed of the motor when the end determination processing portion determines that the turning angle has reached the limit angle.

公开(公告)号：US20140343794A1

公开(公告)日：2014-11-20

申请号：US14271973

申请日：2014-05-07

申请人： JTEKT CORPORATION

发明人： Terutaka TAMAIZUMI ,  Hirozumi EKI ,  Masayuki KITA ,  Isao NAMIKAWA ,  Jun HASEGAWA ,  Akihiko NISHIMURA

IPC分类号： B62D5/04

CPC分类号： B62D5/0463 ,  B62D5/0472 ,  B62D6/008

摘要： There is provided an electric power steering system that makes it possible to improve the driver's steering feel, and that includes a controller that controls driving of a motor. The controller computes a first assist component based on a steering torque. The controller computes a torque command value based on a basic drive torque that is the sum of the steering torque and the first assist component, and computes an assist compensation component through feedback control based on the torque command value. The controller computes a steered angle command value based on a value obtained by adding the assist compensation component to the basic drive torque, and computes a second assist component through feedback control based on the steered angle command value. The controller controls driving of the motor based on an assist command value that is the sum of the first assist component and the second assist component.

摘要翻译： 提供了一种能够提高驾驶员的转向感觉的电动助力转向系统，并且包括控制电动机的驱动的控制器。 控制器基于转向扭矩计算第一辅助部件。 控制器基于作为转向转矩和第一辅助部件的总和的基本驱动转矩来计算转矩指令值，并且通过基于转矩指令值的反馈控制来计算辅助补偿成分。 控制器基于通过将辅助补偿分量加到基本驱动转矩而获得的值来计算转向角度指令值，并且通过基于转向角度指令值的反馈控制来计算第二辅助分量。 控制器基于作为第一辅助部件和第二辅助部件的总和的辅助命令值来控制马达的驱动。

公开(公告)号：US20180057043A1

公开(公告)日：2018-03-01

申请号：US15674834

申请日：2017-08-11

申请人： JTEKT CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Takahiro TOKO ,  Hiromasa TAMAKI ,  Jun HASEGAWA ,  Shohei FUJITA ,  Kohei YANAI ,  Tatsuya SUZUKI

IPC分类号： B62D5/04 ,  B62D3/12

CPC分类号： B62D5/0469 ,  B62D3/12 ,  B62D5/0463

摘要： A steering control device includes a feedback processing portion configured to control a current flowing through a motor to a current command value; an end determination processing portion configured to determine whether a turning angle of steered wheels has reached a limit angle; and an end-time limit processing portion configured to limit a magnitude of the current command value to a magnitude of a limited current value or smaller, when the end determination processing portion determines that the turning angle has reached the limit angle. The limited current value is a value obtained by performing correction to decrease a magnitude of a detected value of the current flowing through the motor at a time when the end determination processing portion determines that the turning angle has reached the limit angle, based on a degree of a decrease in a magnitude of a rotational speed of the motor.

公开(公告)号：US20180057009A1

公开(公告)日：2018-03-01

申请号：US15668294

申请日：2017-08-03

申请人： JTEKT CORPORATION

发明人： Shingo MAEDA ,  Terutaka TAMAIZUMI ,  Jun HASEGAWA ,  Masayuki KITA ,  Gempei NAKASONE ,  Hiromasa TAMAKI

IPC分类号： B60W30/18 ,  B60W30/12 ,  B60W50/08 ,  B60W50/10

CPC分类号： B60W30/18163 ,  B60W30/12 ,  B60W50/087 ,  B60W50/10 ,  B62D1/286 ,  B62D15/025

摘要： An ECU includes a deviation calculating circuit an assist control circuit, an automatic steering control circuit including an intervention determination switching circuit, an adder, a current command value calculating circuit The intervention determination switching circuit includes a count amount calculating circuit, an adder, an immediately-preceding count amount output circuit, a switching determination circuit, and an output switching circuit. The count amount calculating circuit calculates a count amount having a positive value or a negative value based on a steering torque absolute value calculated by an absolute value switching circuit. The adder calculates a total count amount that is the total sum of a presently calculated count amount and an immediately-preceding count amount calculated in an immediately-preceding calculation cycle. The switching determination circuit determines a driver's intention to intervene in steering, based on whether the total count amount is equal to or greater than a count amount threshold value.