To provide a hydraulic control device of an automatic transmission which can block the supply of range pressure to a prescribed solenoid valve without increasing the number of part items even if using two pieces of changeover valves.SOLUTION: A hydraulic control device of an automatic transmission comprises: a first selector valve 10 which can switch an output state to a state that line pressure PL is outputted as forward range pressure PD, and a state that the line pressure PL is outputted as non-forward range pressure PnD; and a second selector valve 20 which can switch the output state to a first state that the forward range pressure PD inputted into a first input port 20c is outputted from a first output port 20e, and a second state that the non-forward range pressure PnD inputted into a second input port 20d is outputted from the first output port 20e by the supply and discharge of second signal hydraulic pressure PSC3. The second selector valve 20 is maintained at the second state while a first clutch is brought into at least an engagement state from a release state when a gear change stage is switched to a forward first speed stage from a reverse stage.SELECTED DRAWING: Figure 3

    【課題】2本の切換えバルブを使用しながらも、部品点数を増やすことなく、所定のソレノイドバルブへのレンジ圧の供給を遮断できる自動変速機の油圧制御装置を提供する。【解決手段】ライン圧PLを前進レンジ圧PDとして出力する状態と、ライン圧PLを非前進レンジ圧PnDとして出力する状態とに、切換可能な第1の切換えバルブ10と、第1の入力ポート20cに入力された前進レンジ圧PDを第1の出力ポート20eから出力する第1の状態と、第2の入力ポート20dに入力された非前進レンジ圧PnDを第1の出力ポート20eから出力する第2の状態とに、第2の信号油圧PSC3の給排により切換可能な第2の切換えバルブ20と、を備え、第2の切換えバルブ20は、変速段が後進段から前進1速段に切り換わる際に、第1のクラッチが解放状態から少なくとも係合状態になるまでの間、第2の状態に維持される。【選択図】図3


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    Titel :

    HYDRAULIC CONTROL DEVICE OF AUTOMATIC TRANSMISSION


    Weitere Titelangaben:

    自動変速機の油圧制御装置


    Beteiligte:
    YAMADA INAZO (Autor:in) / KOJIMA KAZUTERU (Autor:in) / HYODO YOSHIMITSU (Autor:in)

    Erscheinungsdatum :

    2019-04-25


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    F16H Getriebe , GEARING / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF



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