PROBLEM TO BE SOLVED: To provide a hydraulic power steering device in which deviation is difficult to occur between hydraulic pressure applied to a hydraulic actuator and hydraulic pressure meeting a target assist force.SOLUTION: A hydraulic power steering device includes: an electric pump 25 for supplying hydraulic fluid to a hydraulic actuator 21; a flow control valve 40 for controlling an amount of supply and discharge of the hydraulic fluid for the hydraulic actuator 21; a hydraulic sensor 36 as an example of hydraulic detection means for detecting a hydraulic pressure of the hydraulic fluid flowing from the flow control valve 40 to the hydraulic actuator 21; and a control section 50. The hydraulic power steering device includes a torque sensor 14, a steering angle sensor 15, and a vehicle speed sensor 3, which are examples of state detection means for detecting a driving state of a vehicle. The control section 50 performs feedback control of at least an opening of the flow control valve 40 and supply amount of the hydraulic fluid of the electric pump 25 on the basis of the hydraulic pressure detected by the hydraulic sensor 36 and a hydraulic pressure meeting a target assist force.

    【課題】油圧アクチュエータに付与される油圧と目標アシスト力に応じる油圧とにずれが生じにくい油圧式パワーステアリング装置を提供する。【解決手段】油圧式パワーステアリング装置は、油圧アクチュエータ21に作動油を供給する電動ポンプ25、油圧アクチュエータ21に対する作動油の給排量を制御する流量制御弁40、流量制御弁40から油圧アクチュエータ21に流れる作動油の油圧を検出する油圧検出手段の一例としての油圧センサ36、および、制御部50を有する。また、油圧式パワーステアリング装置は、車両の運転状態を検出する状態検出手段の一例としてのトルクセンサ14、操舵角センサ15、および、車速センサ3を有する。制御部50は、油圧センサ36により検出された油圧と目標アシスト力に応じる油圧とに基づいて、流量制御弁40の開度、および、電動ポンプ25の作動油の供給量の少なくとも一方をフィードバック制御する。【選択図】図1


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    Title :

    HYDRAULIC POWER STEERING DEVICE


    Additional title:

    油圧式パワーステアリング装置


    Contributors:

    Publication date :

    2015-11-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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