公开(公告)号：US20200231204A1

公开(公告)日：2020-07-23

申请号：US16844587

申请日：2020-04-09

Applicant: Showa Corporation

Inventor： Ken ISSHIKI ,  Eishi ISHIMARU ,  Kyouichi TAGAMI ,  Nobuyuki ENOMOTO

IPC: B62D5/04 ,  B62D6/00

Abstract: Assist torque or reaction force torque with little unnatural feeling to a driver is applied. An ECU includes: a control amount calculation section that calculates a control amount for controlling magnitude of the assist torque or the reaction force torque with reference to steering torque applied to a steering member; and a control amount correction section that corrects the control amount calculated by the control amount calculation section with reference to a lateral G of a vehicle body, a steering angle of the steering member, and a steering angle speed of the steering member.

公开(公告)号：US20200377149A1

公开(公告)日：2020-12-03

申请号：US16996430

申请日：2020-08-18

Applicant: SHOWA CORPORATION

Inventor： Kyouichi TAGAMI ,  Ken ISSHIKI ,  Nobuyuki ENOMOTO ,  Eishi ISHIMARU

IPC: B62D5/04 ,  B62D6/10

Abstract: A steering control device which applies an assist torque or a reaction torque to a steering member operated by a driver, includes: a torque loss estimation unit which estimates torque loss; and a correction amount calculation unit which calculates a correction amount according to a rack axial force estimation value calculated based on a roll rate when the torque loss estimation unit estimates the torque loss.

公开(公告)号：US20160280252A1

公开(公告)日：2016-09-29

申请号：US15078455

申请日：2016-03-23

Applicant: Showa Corporation

Inventor： Kyouichi TAGAMI ,  Katsutoshi YOKOI ,  Eishi ISHIMARU ,  Tadayoshi IWASE

IPC: B62D5/04 ,  B62D3/12 ,  B62D6/10

CPC classification number: B62D5/046 ,  B62D3/12 ,  B62D5/0421 ,  B62D5/0472 ,  B62D6/10

Abstract: Disclosed is a motor-driven power steering apparatus including: a base current calculator configured to calculate a base current, which is a base for a target current, based on a detected torque detected by a torque sensor; a band-pass filter configured to allow a predetermined range of frequency components of the detected torque to the pass through the band-pass filter; a base shimmy compensation current calculator configured to calculate a base shimmy compensation current, which is a base for a shimmy compensation current required to suppress a disturbance torque, based on an extracted torque after passing through the band-pass filter; a shimmy compensation current calculator configured to calculate the shimmy compensation current by correcting the base shimmy compensation current according to magnitude of amplitude of the extracted torque; and a final target current determination unit configured to determine the target current based on the base current and the shimmy compensation current.

Abstract translation: 本发明公开了一种电动机动力转向装置，其特征在于，包括：基准电流计算部，其基于由转矩传感器检测出的检测转矩来计算作为目标电流的基准的基极电流; 带通滤波器，被配置为允许检测到的扭矩的预定频率分量范围通过带通滤波器; 基础振动补偿电流计算器，被配置为基于通过带通滤波器之后的提取的扭矩来计算作为抑制干扰转矩所需的振动补偿电流的基极振动补偿电流; 配置为通过根据提取的扭矩的振幅的大小校正基准振动补偿电流来计算振动补偿电流的振动补偿电流计算器; 以及最终目标电流确定单元，被配置为基于所述基极电流和所述振动补偿电流来确定所述目标电流。

公开(公告)号：US20210061041A1

公开(公告)日：2021-03-04

申请号：US17095219

申请日：2020-11-11

Applicant: SHOWA CORPORATION

Inventor： Kyouichi TAGAMI ,  Ken ISSHIKI ,  Nobuyuki ENOMOTO ,  Eishi ISHIMARU

IPC: B60G17/0195 ,  B62D5/04 ,  B62D6/04 ,  B60G17/06

Abstract: An embodiment of the present invention allows for application of an assist torque or reaction torque which causes a driver to feel less discomfort. An ECU (600) includes a rack shaft axial force estimating section (620) configured to estimate a rack shaft axial force with reference to a roll rate of a vehicle body.