A CONTROL METHOD FOR ACTUATING A SHAKE MOVEMENT OF A BUCKET CONNECTED TO A BOOM IN A WORK VEHICLE POWERED BY A MOTOR, A CORRESPONDING CONTROL SYSTEM AND A WORK VEHICLE COMPRISING SUCH CONTROL SYSTEM

摘要

A control method for actuating a shake movement of a bucket connected to a boom in a work vehicle powered by a motor is disclosed. Actuating the bucket occurs by means of a joystick controlled by a user, a movement of the joystick in a predetermined control area according to a preset axis causing the actuation of the bucket by an hydraulic actuator. The hydraulic actuator includes an open centre directional solenoid valve whose opening degree is controlled by means of a driving current as a function of the position of the joystick. The control method comprises acquiring a position of the joystick, acquiring a rotational speed of the motor, detecting the frequency of travel of the joystick from a first predetermined threshold position to a second predetermined threshold position reversed with respect to a neutral position, with a predetermined distance among them, and, if the frequency of travel of the joystick, is higher than a predetermined frequency threshold, supplying a predetermined shaking driving current evolving according to a square wave to the open centre directional solenoid valve, the predetermined shaking driving current being based on a reference model indicative of a nominal relation between the rotational speed of the motor and the amplitude of the driving current.