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Patent Searching and Data


Title:
VEHICLE STEERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/100411
Kind Code:
A1
Abstract:
[Problem] To provide a vehicle steering device that can easily attain a steering torque equivalent to a steering angle or the like independently of the condition of a road surface and changes in mechanical characteristics of a steering system due to aging. Also, to return a steering wheel to a position near the center position after hands are off the steering wheel. [Solution] This vehicle steering device for carrying out assist control for a steering system comprises a target steering torque generation unit for generating a target steering torque, a conversion unit for converting the target steering torque into a target torsion angle, and a torsion angle control unit for calculating a motor current command value such that the torsion angle follows the target torsion angle, wherein the target steering torque generation unit is equipped with a steering wheel return compensation unit for calculating, on the basis of a steering torque and first angular velocity information, a first torque signal for compensating return of a steering wheel, outputs the first torque signal as a target steering torque, and controls driving of a motor on the basis of the motor current command value.

Inventors:
TSUBAKI TAKAHIRO (JP)
IMAMURA YOUSUKE (JP)
Application Number:
PCT/JP2019/036298
Publication Date:
May 22, 2020
Filing Date:
September 17, 2019
Export Citation:
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Assignee:
NSK LTD (JP)
International Classes:
B62D6/00; B62D5/04; B62D101/00; B62D113/00; B62D117/00; B62D119/00
Domestic Patent References:
WO2018147371A12018-08-16
WO2014167631A12014-10-16
Foreign References:
JPH08175404A1996-07-09
JP2011131629A2011-07-07
JP2008273246A2008-11-13
JP2006137281A2006-06-01
JP2003306161A2003-10-28
Attorney, Agent or Firm:
AGATA Yuzo (JP)
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