公开(公告)号：US11247685B2

公开(公告)日：2022-02-15

申请号：US16538371

申请日：2019-08-12

Applicant: SHOWA CORPORATION

Inventor： Ken Isshiki ,  Eishi Ishimaru ,  Kyouichi Tagami ,  Katsutoshi Yokoi

IPC: B60W40/06 ,  B62D6/00 ,  B60G17/06 ,  B60G17/0165 ,  B60G17/016

Abstract: A road surface condition is determined appropriately. A road surface determining section (84) configured to determine a road surface condition with reference to a wheel speed signal indicative of wheel speeds includes a band-stop filter (841) which acts on the wheel speed signal and has a cutoff frequency band which is changed in accordance with the wheel speed signal.

公开(公告)号：US11912351B2

公开(公告)日：2024-02-27

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

CPC classification number: B62D5/0463 ,  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：US11472470B2

公开(公告)日：2022-10-18

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：US11254353B2

公开(公告)日：2022-02-22

申请号：US16538360

申请日：2019-08-12

Applicant: SHOWA CORPORATION

Inventor： Ken Isshiki ,  Eishi Ishimaru

IPC: B62D5/04 ,  B62D6/10

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 control variable calculating section (611) configured to calculate a control variable for controlling a magnitude of the assist torque or reaction torque, with reference to a steering torque applied to a steering member (410); and a control variable correcting section (612) configured to correct the control variable calculated by the control variable calculating section, with reference to a roll rate 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：US11110912B2

公开(公告)日：2021-09-07

申请号：US16538373

申请日：2019-08-12

Applicant: SHOWA CORPORATION

Inventor： Ken Isshiki ,  Eishi Ishimaru ,  Kyouichi Tagami ,  Katsutoshi Yokoi

IPC: B60W30/02 ,  B60W10/20 ,  B60W10/22

Abstract: An embodiment of the present invention provides higher ride comfort to a driver in control of steering and suspension. An ECU (600) includes: a steering control section (610) which controls a magnitude of an assist torque or a reaction torque; and a suspension control section (650) which controls a damping force of a suspension. The steering control section (610) refers to a state of a vehicle which state is predicted by the suspension control section (650), and the suspension control section (650) refers to a steering torque.