To provide a hydraulic power steering system which can inhibit increase of a steering force by a driver when a hydraulic pump is unintentionally stopped due to failure etc.SOLUTION: A hydraulic power steering system 100 includes: a first oil passage 171 which connects a hydraulic pump 130 with a control valve 150; a second oil passage 172 which connects a reservoir tank 140 with the control valve 150; a bypass oil passage 200 which connects the first oil passage 171 with the second oil passage 172 and allows communication between the first oil passage 171 and the second oil passage 172 through the hydraulic pump 130; and a bypass valve 201 which is disposed at the bypass oil passage 200 and opens or closes the bypass oil passage 200.SELECTED DRAWING: Figure 1

    【課題】液圧ポンプが故障などにより意図せずに停止したときのドライバーによる操舵力の増加を抑制できる液圧パワーステアリングシステムを提供すること。【解決手段】油圧パワーステアリングシステム100は、油圧ポンプ130とコントロールバルブ150とを接続する第1油路171と、リザーバータンク140とコントロールバルブ150とを接続する第2油路172と、第1油路171と第2油路172とを接続し油圧ポンプ130を介さずに第1油路171と第2油路172とを連通させるバイパス油路200と、バイパス油路200に配置されバイパス油路200を開閉するバイパスバルブ201と、を有する。【選択図】図1


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    Title :

    HYDRAULIC POWER STEERING SYSTEM


    Additional title:

    液圧パワーステアリングシステム


    Contributors:

    Publication date :

    2020-04-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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