A hydraulic drive system is provided for a wheeled working machine such that, when making a hill start, the wheeled working machine is allowed to start without rolling down a hill road. The hydraulic drive system is provided with a selector switch (26) capable of selecting a work brake mode which is a temporary stop mode for a travel base (3) to be performed upon conducting work by working equipment (5), a proportional solenoid valve (27) capable of controlling a braking directional control valve (25), and a controller (28) capable of outputting a brake actuation signal (S1) or brake release signal (S2) to the proportional solenoid valve (27) responsive to a signal outputted from a brake control amount-determining pressure sensor (24). The controller (28) includes a delay means for introducing a time delay into the brake release signal (S2) responsive to a signal outputted from a travel control amount-determining pressure sensor (18), and performs processing such that the brake release signal (S2) as delayed by the delay means is outputted to the proportional solenoid valve (27).


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    Title :

    WHEEL-TYPE WORK MACHINE WITH A HYDRAULIC DRIVE SYSTEM


    Additional title:

    ARBEITSMASCHINE MIT RÄDERN MIT EINEM HYDRAULISCHEN ANTRIEBSSYSTEM
    MACHINE DE CHANTIER DU TYPE SUR ROUES AVEC UN SYSTÈME D'ENTRAÎNEMENT HYDRAULIQUE


    Contributors:

    Publication date :

    2020-01-01


    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 / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / E02F Baggern , DREDGING



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