A materials handling vehicle is provided comprising: a support structure including a fixed member; a movable assembly coupled to the support structure; a hydraulic system; and a control system. The support structure further comprises lift apparatus to effect movement of the movable assembly relative to the support structure fixed member. The lift apparatus includes at least one ram/cylinder assembly. The hydraulic system includes a motor, a pump coupled to the motor to supply a pressurized fluid to the at least one ram/cylinder assembly, and at least one electronically controlled valve associated with the at least one ram/cylinder assembly. The control structure may estimate a speed of the movable assembly from a speed of the motor and control the operation of the at least one valve using the estimated movable assembly speed.

    Un véhicule de manipulation de matériaux comprend : une structure de support comprenant un élément fixe, un ensemble mobile couplé à la structure de support, un système hydraulique et un système de commande. La structure de support comprend en outre un appareil de levage conçu pour déplacer lensemble mobile par rapport à lélément fixe de la structure de support. Lappareil de levage comprend au moins un ensemble vérin/cylindre. Le système hydraulique comprend un moteur, une pompe couplée au moteur afin de fournir un fluide sous pression à/aux ensemble(s) vérin/cylindre et au moins une soupape à commande électronique associée à/aux ensemble(s) vérin/cylindre. La structure de commande peut estimer une vitesse de lensemble mobile à partir dune vitesse du moteur et elle peut commander le fonctionnement de la ou des soupapes à laide de la vitesse estimée de lensemble mobile.


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    Title :

    MATERIALS HANDLING VEHICLE MONITORING A PRESSURE OF HYDRAULIC FLUID WITHIN A HYDRAULIC STRUCTURE


    Additional title:

    VEHICULE DE MANUTENTION DE MATERIAUX SURVEILLANT UNE PRESSION DE FLUIDE HYDRAULIQUE DANS UNE STRUCTURE HYDRAULIQUE


    Contributors:

    Publication date :

    2019-04-09


    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



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