公开(公告)号：US20190193789A1

公开(公告)日：2019-06-27

申请号：US16227186

申请日：2018-12-20

申请人： JTEKT CORPORATION

发明人： Hiroshi HOSONO ,  Akira NAMBU ,  Tatsuya SUZUKI

IPC分类号： B62D15/02 ,  B62D5/00 ,  B62D5/04

CPC分类号： B62D15/0235 ,  B62D5/008 ,  B62D5/0421 ,  B62D5/0442 ,  B62D5/0466 ,  B62D5/0481 ,  B62D15/0215 ,  B62D15/0245

摘要： A steering angle calculating circuit includes a first neutral point calculating circuit, a second neutral point calculating circuit, and an absolute angle calculating circuit. The first neutral point calculating circuit calculates a motor neutral point (θm01), based on a steering angle detected by a steering sensor and a rotation angle of a motor detected by the relative angle sensor, when a drive source for driving a vehicle is started. The second neutral point calculating circuit calculates a motor neutral point when the steering angle detected by the steering sensor falls within a predetermined angle range in which a specific stroke with respect to the steering angle is constant. After the motor neutral point is calculated by the second neutral point calculating circuit, the absolute angle calculating circuit calculates the steering angle as an absolute angle, using the motor neutral point calculated by the second neutral point calculating circuit.

公开(公告)号：US20190193778A1

公开(公告)日：2019-06-27

申请号：US16229762

申请日：2018-12-21

申请人： Hyundai Mobis Co., Ltd.

发明人： Sang Hong BAE ,  Kyoung Soo LIM ,  Lyoung Tae KIM

IPC分类号： B62D5/04 ,  B62D15/02

CPC分类号： B62D5/0466 ,  B62D5/0463 ,  B62D5/0472 ,  B62D15/021

摘要： A torque compensation apparatus for a Motor Driven Power Steering (“MDPS”) system including: a column torque sensor configured to detect column torque applied to a steering shaft; a steering angle sensor configured to detect a steering angle of a steering wheel; and a controller configured to calculate a compensation ratio by sudden steering, based at least one of the column torque detected by the column torque sensor and a steering angular velocity calculated from the steering angle detected by the steering angle sensor. The basic assist torque outputted from the MDPS system is then compensated for according to the compensation ratio.

公开(公告)号：US09944315B2

公开(公告)日：2018-04-17

申请号：US15357910

申请日：2016-11-21

申请人： HYUNDAI MOBIS CO., LTD.

发明人： Kyoung Soo Lim ,  Lyoung Tae Kim

IPC分类号： B62D5/04 ,  B62D6/00

CPC分类号： B62D5/0472 ,  B62D5/0457 ,  B62D5/0466 ,  B62D6/008

摘要： Enclosed are an apparatus and a method for controlling steering return of a motor driven power steering system. More particularly, various embodiments of the present disclosure relate to an apparatus and method for controlling steering return of a motor driven power steering system, which enables an overshoot-free center stop to be made as well as enables a quick return to be made, when returning after steering by a large steering angle in the motor driven power steering system.

公开(公告)号：US09896122B2

公开(公告)日：2018-02-20

申请号：US14768096

申请日：2013-04-08

申请人： MITSUBISHI ELECTRIC CORPORATION

发明人： Masaya Endo ,  Yoshihiko Kimpara ,  Kenji Ogawa ,  Taizo Toda

IPC分类号： B62D5/04

CPC分类号： B62D5/0463 ,  B62D5/0466

摘要： Provided is a steering control device, including: an actuator for applying a steering assist torque to a steering system of a vehicle; a vehicle turning state detection section for detecting a state amount representing a turning state of the vehicle; a steering-holding determination section for determining a steering-holding state of the steering system; a storing section for storing, when the steering-holding determination section determines that the steering system is in the steering-holding state, the state amount detected by the vehicle turning state detection section as a steering-holding determination state amount; a steering assist torque calculation section for calculating the steering assist torque based on an absolute value of the steering-holding determination state amount; and an actuator control section for controlling the actuator based on the calculated steering assist torque.

公开(公告)号：US09884643B2

公开(公告)日：2018-02-06

申请号：US14796947

申请日：2015-07-10

申请人： HYUNDAI MOBIS CO., LTD.

发明人： Eun Kyung Gu

IPC分类号： B62D6/00 ,  B62D6/08 ,  B62D5/04

CPC分类号： B62D5/0463 ,  B62D5/0466

摘要： A friction compensation control apparatus of a motor driven power steering (MDPS) system may include: a damping control unit configured to detect a damping torque of the MDPS system; and a friction compensation control module configured to detect a friction compensation torque using a column torque, a motor speed, and a vehicle speed, and adjust the detected friction compensation torque according to the magnitude of the damping torque.

公开(公告)号：US20180022377A1

公开(公告)日：2018-01-25

申请号：US15552600

申请日：2016-02-12

申请人： NSK Ltd.

发明人： Takahiro TSUBAKI

IPC分类号： B62D5/04 ,  B62D6/10

CPC分类号： B62D5/0466 ,  B62D5/0463 ,  B62D6/10

摘要： An electric power steering apparatus that achieves a desired steering characteristic in minutely steering at on-center, suppresses frictional feeling, and improves linear steering feeling at on-center, and a control apparatus that determines a parameter. The apparatus calculates a current command value by using an assist map related to a steering torque and a vehicle speed, drives a motor based on the current command value, and assists and controls a steering system.

公开(公告)号：US09815491B2

公开(公告)日：2017-11-14

申请号：US14618315

申请日：2015-02-10

申请人： JTEKT CORPORATION

发明人： Shinya Aono

IPC分类号： B62D5/04 ,  B62D6/00 ,  B62D6/10

CPC分类号： B62D5/0463 ,  B62D5/0466 ,  B62D6/002 ,  B62D6/10

摘要： An electric power steering apparatus is provided which can suppress the difference in steering feel between before and after it is allowed to compute an absolute steering angle and which can improve the steering feel. A basic assist control unit sets a basic assist current value. An assist gain setting unit sets assist gain. The assist gain is fixed to a lower limit value less than one before it is allowed to compute the absolute steering angle, and is gradually increased from the lower limit value to one and is then fixed to one after it is allowed to compute the absolute steering angle. An assist gain multiplication unit corrects the basic assist current value by multiplying the basic assist current value by the assist gain.

公开(公告)号：US20170247051A1

公开(公告)日：2017-08-31

申请号：US15434405

申请日：2017-02-16

申请人： JTEKT CORPORATION

发明人： Shigeto MATSUO ,  Terutaka TAMAIZUMI

IPC分类号： B62D6/08 ,  B62D5/04

CPC分类号： B62D6/08 ,  B62D3/12 ,  B62D5/0409 ,  B62D5/0463 ,  B62D5/0466

摘要： A steered-angle command value calculation circuit calculates a steered-angle command value by adding a steering torque to a first assist component that is a sum of a basic assist control amount, a hysteresis control amount and a damping control amount. A steered-angle feedback control circuit calculates a second assist component by angle feedback control based on the steered-angle command value. A compensation control circuit generates the hysteresis control amount and the damping control amount based on a determination flag generated by a hand release determination circuit and indicating whether or not the steering state corresponds to a hand release state. The hand release determination circuit determines whether or not the steering state corresponds to the hand release state based on signs of a steering angle calculated by a steering-angle calculation circuit, a steering angular velocity that is a differential value of the steering angle, and a steering angle acceleration.

公开(公告)号：US09738307B2

公开(公告)日：2017-08-22

申请号：US14767374

申请日：2013-04-08

申请人： Mitsubishi Electric Corporation

发明人： Masaya Endo ,  Hidetoshi Ikeda ,  Isao Kezobo ,  Kenji Ogawa ,  Taizo Toda

IPC分类号： B62D5/00 ,  B62D5/04 ,  B62D6/08

CPC分类号： B62D5/0466 ,  B62D5/0463 ,  B62D6/08

摘要： Provided are a steering control device and the like, including the steps of: calculating a steering assist torque to be applied to an actuator for applying the steering assist torque to a steering system of a vehicle in order to improve return characteristics of the steering system; determining a steering state of a driver; correcting the steering assist torque depending on a result of the steering state determination; and controlling the actuator depending on the corrected steering assist torque, in which the step of determining a steering state of a driver includes determining the steering state of the driver based on a combination of at least two of the following: a manually-operating steering state determination; an abrupt steering wheel return determination; a high-acceleration steering wheel return determination; a manual return steering determination; and an additional-steering determination.

公开(公告)号：US20170183027A1

公开(公告)日：2017-06-29

申请号：US15376094

申请日：2016-12-12

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Yukihide KIMURA ,  Yoji KUNIHIRO ,  Takeshi GOTO

IPC分类号： B62D5/04

CPC分类号： B62D5/0463 ,  B62D5/04 ,  B62D5/0409 ,  B62D5/0421 ,  B62D5/0457 ,  B62D5/0466 ,  B62D5/0472 ,  B62D5/0481 ,  B62D5/0493 ,  B62D6/08 ,  B62D15/021 ,  B62D15/025

摘要： A steering assist device includes: a steering torque detector; a steering operation amount acquisition device; an electric power steering device; and a control device configured to calculate a target control current of the electric power steering device, to supply the control current corresponding to the target control current to the electric power steering device, to determine a situation of steering operation of a driver, and to make a current component corresponding to the target inertia compensation assist torque in the target control current smaller when it is determined that the steering operation is turn-back steering with acceleration and deceleration than when it is determined that the steering operation of the driver is not the turn-back steering with acceleration and deceleration.