Patent ID: 11965314
Assignee: CNH INDUSTRIAL AMERICA LLC
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A control method for actuating the movement of a boom in a work vehicle powered by a motor;
wherein actuating the boom occurs by means of a joystick controlled by an operator, a movement of the joystick in a predetermined control area according to a preset boom actuation axis causing the actuation of the boom by hydraulic actuating means,
wherein the hydraulic actuating means include an hydraulic cylinder operatively connected the boom, and a directional solenoid valve whose opening degree is adapted to control the flow of a working fluid to the hydraulic cylinder;
the rate of actuation of the boom being controlled by the opening degree of the directional solenoid valve by means of a driving current thereof as a function of a component of the position of the joystick along the preset boom actuation axis in the control area;
the control method comprising the steps of:
acquiring, a signal or data indicative of the position of the joystick along the preset boom actuation axis and a signal or data indicative of the position of the boom along a boom travel path over time;
based on the signal or data indicative of the position of the joystick, determining a joystick position difference between the actual component of the position of the joystick along the preset boom actuation axis in a first time instant and a neutral position of the joystick along the preset boom actuation axis;
based on the signal or data indicative of the position of the boom, determining a first position of the boom along the boom travel path in the first time instant;
based on the signal or data indicative of the position of the boom, detecting a second position of the boom along the boom travel path in a second time instant, successive with respect to the first time instant;
determining a boom position difference between the second position and the first position of the boom;
if the determined boom position difference is lower than a predetermined boom position difference threshold and the determined joystick position difference is higher than predetermined joystick position difference threshold, supplying a reduced driving current or a null driving current to the directional solenoid valve so as to slow down or stop the movement of the boom.