Trailer, auxiliary axle for a trailer, device and method for controlling the coupling and/or uncoupling between a trailer axle and an auxiliary motor

A method of controlling the coupling and/or decoupling between a shaft of a road implement and at least one auxiliary engine arranged adjacent to the shaft, said method comprising a coupling and/or decoupling device between the shaft and the auxiliary engine equipped with a free differential assembly and a control system of the device, said method comprising the steps of:

• a) sending a first signal from the control system to an actuator of the device, activating at least one free differential assembly when the auxiliary engine rotation is synchronized with the shaft rotation, during a coupling period (A) initiated by a command of the auxiliary engine drive vehicle;
• b) displacement of a drive shaft of the device by the actuator from an initial position, transmitting the movement of said drive shaft to a coupling cover through a motion transmission fork, wherein displacement of the sleeve coupling is in a coaxial movement to a sprocket wheel of the differential of the free differential assembly of the device, engaging the sleeve coupling to a gear which is coupled to the reducer assembly of the auxiliary engine;
• c) sending a second signal from the control system to the device actuator, returning the drive shaft to the initial position, during a decoupling period (D) initiated by a new command of the vehicle to deactivate the auxiliary engine;
• and
• d) returning the drive shaft to the initial position, transmitting the movement of said drive shaft to a sleeve coupling through the motion transmission fork, wherein the displacement of the sleeve coupling in coaxial movement to a sprocket wheel of the differential of the free differential assembly of the device disengages the sleeve coupling from the gear, interrupting interaction between the auxiliary engine and the shaft, ending the decoupling period (D).