At least one of first and second hydraulic motor units that drive first and second wheels is of a variable displacement. A volume adjusting mechanism thereof is operated by an electric motor in accordance with manual operation or automatic operation based on difference in turning radius between the first and second wheels. A control device that controls the electric motor includes normal mode that operates the electric motor in accordance with the manual operation or the automatic operation and torque-up mode that fixes the variable displacement hydraulic motor to a first volume larger than a standard volume, and activates the torque-up mode at idling state in which a power source is in operating state and a pump-side volume adjusting mechanism is in neutral state and shifts the torque-up mode to the normal mode when a traveling speed reaches a first speed.
HYDRAULIC FOUR-WHEEL-DRIVE WORK VEHICLE
HYDRAULISCHES VIERRADANTRIEBSARBEITSFAHRZEUG
VÉHICULE UTILITAIRE À ENTRAÎNEMENT HYDRAULIQUE DES QUATRE ROUES
2018-10-10
Patent
Electronic Resource
English
Hydraulic motor unit and hydraulic four-wheel-drive working vehicle
European Patent Office | 2015
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