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公开(公告)号：US11472470B2
公开(公告)日：2022-10-18
申请号：US16844587
申请日：2020-04-09
申请人： Showa Corporation
发明人： Ken Isshiki , Eishi Ishimaru , Kyouichi Tagami , Nobuyuki Enomoto
摘要： 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.
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公开(公告)号：US11110912B2
公开(公告)日：2021-09-07
申请号：US16538373
申请日：2019-08-12
申请人： SHOWA CORPORATION
发明人： Ken Isshiki , Eishi Ishimaru , Kyouichi Tagami , Katsutoshi Yokoi
摘要： 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.
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公开(公告)号：US11247685B2
公开(公告)日：2022-02-15
申请号：US16538371
申请日：2019-08-12
申请人： SHOWA CORPORATION
发明人： Ken Isshiki , Eishi Ishimaru , Kyouichi Tagami , Katsutoshi Yokoi
IPC分类号： B60W40/06 , B62D6/00 , B60G17/06 , B60G17/0165 , B60G17/016
摘要： 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.
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公开(公告)号：US11912351B2
公开(公告)日：2024-02-27
申请号：US16996430
申请日：2020-08-18
申请人： SHOWA CORPORATION
发明人： Kyouichi Tagami , Ken Isshiki , Nobuyuki Enomoto , Eishi Ishimaru
CPC分类号： B62D5/0463 , B62D6/10
摘要： 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.
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公开(公告)号：US09610973B2
公开(公告)日：2017-04-04
申请号：US15078455
申请日：2016-03-23
申请人： Showa Corporation
CPC分类号： B62D5/046 , B62D3/12 , B62D5/0421 , B62D5/0472 , B62D6/10
摘要： 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, considered 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.
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