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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2017/122562
Kind Code:
Provided is a steering device which allows continued safe travel in the event of a fault during automatic steering control. The steering device is equipped with an electric drive device composed of a plurality of systems of electric motors and has an assist control function for assisting a driver in steering and an automatic steering control function for automatically controlling the steering angle of steered wheels on the basis of a steering angle instruction value. In the event a fault occurs in one of the electric motor systems of the electric drive device during control under automatic operation control, a controller in the steering device maintains automatic operation control S36 using the electric motor of a normally operating system not suffering from a fault, and then, upon shifting to assist control S21, the controller sets the output limit value of the electric motor to a fault-time output limit value, which is less than a normal-time output limit value set when all electric motor systems are operating normally.

ITOU Takahiro (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
YAMASAKI Masaru (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
SASAKI Mitsuo (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
YAMANO Kazuya (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
Application Number:
Publication Date:
July 20, 2017
Filing Date:
January 05, 2017
Export Citation:
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HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
B62D6/00; B62D5/04; H02P5/46; B62D101/00; B62D119/00; B62D137/00
Foreign References:
Attorney, Agent or Firm:
POLAIRE I.P.C. (13-11, Nihonbashikayabacho 2-chome Chuo-k, Tokyo 25, 〒1030025, JP)
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