The present disclosure refers to a hydrostatic drive for a vehicle (10), which may comprises an open circuit (100), a closed travel circuit (120), and an electronic controller (320). A main variable displacement hydraulic pump (102) may be configured to be driven by an internal combustion engine (12) equipped with a speed sensor (350). The main variable displacement hydraulic pump (102) may be configured to supply hydraulic fluid to at least one hydraulic consumer (34,44,50) via a hydraulic supply line (106). A pressure relief valve (118) may be connected to a reservoir (300) and may be permanently connected to the hydraulic supply line (106) such that hydraulic fluid in the hydraulic supply line (106) is discharged into the reservoir if a preset pressure level is reached in the open circuit. The electronic controller (320) may be configured to run a strong braking mode in which the electronic controller (320) at least partially increases the displacement of the main variable displacement hydraulic pump (102) such that hydraulic fluid is discharged via the permanently connected pressure relief valve (118) into the reservoir (300) if an engine speed is determined, based on a signal received from a speed sensor (350), which is higher than a predetermined maximum engine speed.


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    Title :

    Closed loop drive circuit with external brake assist


    Additional title:

    Antriebsschaltung mit geschlossener Schleife und externer Bremshilfe
    Circuit de commande à boucle fermée avec freinage assisté externe


    Contributors:

    Publication date :

    2019-11-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / E02F Baggern , DREDGING / F04B Verdrängerkraft- und Verdrängerarbeitsmaschinen für Flüssigkeiten , POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / F16H Getriebe , GEARING



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