A hydraulically driven tractor has a header drive system including a header drive motor and a header drive pump driven by an engine for generating a source of hydraulic fluid under pressure for the header drive motor, and a ground drive system including a wheel drive motor and a wheel drive pump driven by the engine for generating a source of hydraulic fluid under pressure for the wheel drive motor. A controller receives input from sensors so as to monitor: a header drive demand value, a wheel drive demand value, an engine load value, and/or an engine RPM value for comparisons to acceptable threshold range to vary the target throttle value if outside of one of the ranges. The controller can also vary the displacement of the wheel drive pump and/or the wheel drive motor in response to variation of the target throttle value to maintain ground speed.


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    Title :

    ENGINE SPEED CONTROL AND GROUND SPEED CONTROL OF A HYDRAULICALLY DRIVEN TRACTOR


    Additional title:

    CONTROLE DE VITESSE DE MOTEUR ET CONTROLE DE VITESSE AU SOL D'UN TRACTEUR A ENTRAINEMENT HYDRAULIQUE


    Contributors:

    Publication date :

    2019-06-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    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 / A01B SOIL WORKING IN AGRICULTURE OR FORESTRY , Bodenbearbeitung in Land- oder Forstwirtschaft / B62D MOTOR VEHICLES , Motorfahrzeuge



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