A method for controlling a hydraulic control system that includes a variable pressure relief valve (324) and is configured for a material handling vehicle may include steps for calibrating the hydraulic control system. The hydraulic control system may be calibrated by controlling, with a controller (218), the variable pressure relief valve to move to a fully open position and then increasing a fluid pressure in a supply passage with a pump. The controller can control the variable pressure relief valve to incrementally move from the fully open position toward a fully closed position by adjusting a control signal supplied to the variable pressure relief valve. The controller may monitor a pressure detected by a pressure sensor (217); and can record a parameter of the control signal valve when the pressure detected by the pressure sensor reaches a target pressure.


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    Title :

    VARIABLE HYDRAULIC PRESSURE RELIEF SYSTEMS AND METHODS FOR A MATERIAL HANDLING VEHICLE


    Additional title:

    SYSTEME ZUR VARIABLEN HYDRAULISCHE DRUCKENTLASTUNG UND VERFAHREN FÜR EIN MATERIALHANDHABUNGSFAHRZEUG
    SYSTÈMES DE DÉCHARGE DE PRESSION HYDRAULIQUE VARIABLE ET PROCÉDÉS POUR UN VÉHICULE DE MANUTENTION DE MATÉRIAUX


    Contributors:

    Publication date :

    2024-01-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last





    VARIABLE HYDRAULIC PRESSURE RELIEF SYSTEMS AND METHODS FOR A MATERIAL HANDLING VEHICLE

    WEISS THOMAS R / SMITH ERIC A | European Patent Office | 2021

    Free access