A spool valve V1 includes a valve element 11 and a cylinder 12 having a bore 12a which accommodates the valve element 11 to be movable in an axial direction. In this spool valve V1, when the valve element 11 in an initial position moves in the axial direction in relation to the cylinder 12, a supply valve port Vi formed between the valve element 11 and the cylinder 12 opens, whereby a working fluid is introduced from a hydraulic pressure source into a hydraulic chamber through the supply valve port Vi. A throttle portion O1 is provided in a fluid channel formed on the hydraulic chamber side of the supply valve port Vi. The throttle portion O1 is configured such that in a throttle valid region which extends from the initial position to a position where the amount of axial movement of the valve element 11 from the initial position becomes equal to a predetermined value, the area of the opening formed between the valve element 11 and the cylinder 12 is constant, and in a throttle invalid region where the amount of axial movement of the valve element 11 exceeds the predetermined value, the area of the opening increases. Thus, it becomes possible to restrain occurrence of oil impact within the hydraulic chamber to which the working fluid is supplied through the spool valve V1.


    Access

    Download


    Export, share and cite



    Title :

    Spool valve


    Contributors:

    Publication date :

    2017-12-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F16K VALVES , Ventile / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



    SPOOL VALVE

    SASANUMA KYOHEI / NORIMATSU TAKAYUKI / HATTORI NAOSHI et al. | European Patent Office | 2017

    Free access

    Spool valve

    SASANUMA KYOHEI / NORIMATSU TAKAYUKI / HATTORI NAOSHI et al. | European Patent Office | 2020

    Free access

    Spool valve system

    KIM SU MIN | European Patent Office | 2024

    Free access

    Double spool valve system

    KIM SU MIN | European Patent Office | 2024

    Free access

    SPOOL VALVE AND DAMPER

    AWANO KOICHIRO | European Patent Office | 2020

    Free access