PROBLEM TO BE SOLVED: To make a rear wheel steering device possess a failsafe function which maintains linearity at a failure of an electronic control device of an actuator which can continuously control left and right independent steering even at a failure of a sensor for detecting a steering angle, and steers left and right rear wheels, in the rear wheel steering device which independently steers the left and right rear wheels.SOLUTION: There are arranged detection system failure determination parts 54L, 54R which diagnose failures by comparing one piece of absolute position information obtained from duplicated absolute position detectors 34, 58, and absolute position information obtained from other absolute position detectors 34, 58 connected to other electronic control devices 13L, 13R via communication means 61. There are arranged microprocessor mutual monitoring parts 58L, 58R which detect that the electronic control devices 13L, 13R are failed. There are arranged control system failure coping parts 60L, 60R for steering rear wheels which are controlled by normal electronic control devices 13L, 13R to steering angles which are the same as those of rear wheels which are controlled by failed electronic control devices.

    【課題】 左右の後輪を独立転舵する後輪転舵装置において、転舵角を検出するセンサの故障時にも継続して左右独立転舵の制御が可能で、かつ左右の後輪を転舵させるアクチュエータの電子制御装置の故障時に、直進性を維持するフェールセーフ機能を備える。【解決手段】 二重化された絶対位置検出器34、58から得られる一方の絶対位置情報を、通信手段61を経由して他方の電子制御装置13L、13Rに接続された他方の絶対位置検出器34、58から得られる絶対位置情報と比較し異常を診断する検出系故障判定部54L、54Rを設ける。電子制御装置13L、13Rが故障したことを検出するマイクロプロセッサ相互監視部58L、58Rを設ける。正常な電子制御装置13L、13Rで制御される後輪を故障した電子制御装置で制御される後輪と同位相の同一転舵角に転舵する制御系故障時対応部60L、60Rを設ける。【選択図】 図1


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    Title :

    REAR WHEEL STEERING CONTROL DEVICE


    Additional title:

    後輪転舵制御装置


    Contributors:

    Publication date :

    2015-12-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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