PROBLEM TO BE SOLVED: To provide a hydraulic power steering device capable of converting a power supply mode to a high output voltage mode when current consumption of a motor drive circuit is large, for example, at a stationary steering, and capable of alleviating a burden of an auxiliary power supply while maintaining the rotation of an electric motor at a full steering state.SOLUTION: When a main power supply power PS is an output voltage switching threshold value KE or more and a rack shaft 7 is not under a full steering state, an ECU 33 for power supply control sets an upper-stage side switching element 53A in a discharge circuit 53 to ON and a lower-stage side switching element 53B to OFF, respectively. When the main power supply power PS is the output voltage switching threshold value KE or more and the rack shaft 7 is under a full steering state, the ECU 33 for power supply control sets the upper-stage side switching element 53A in the discharge circuit 53 to OFF and the lower-stage side switching element 53B to ON, respectively.SELECTED DRAWING: Figure 2

    【課題】据え切り操舵時のようにモータ駆動回路の消費電流が大きいときには電力供給モードを高出力電圧モードにでき、端当て状態時には電動モータの回転を維持させながら補助電源の負担を低減できる油圧パワーステアリング装置を提供する。【解決手段】主電源電力PSが出力電圧切替用閾値KE以上であり、ラック軸7が端当て状態でない場合には、電源制御用ECU33は、放電回路53内の上段側のスイッチング素子53Aをオンに設定し、下段側のスイッチング素子53Bをオフに設定する。主電源電力PSが出力電圧切替用閾値KE以上であり、ラック軸7が端当て状態である場合には、電源制御用ECU33は、放電回路53内の上段側のスイッチング素子53Aをオフに設定し、下段側のスイッチング素子53Bをオンに設定する。【選択図】図2


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    Title :

    HYDRAULIC POWER STEERING DEVICE


    Additional title:

    油圧パワーステアリング装置


    Contributors:

    Publication date :

    2018-11-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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