Commercial motor vehicle, auxiliary axle for commercial motor vehicle, device and method for controlling the coupling and/or uncoupling between an axle of a commercial motor vehicle and an auxiliary motor

1 . A coupling and/or decoupling device between a shaft of commercial automotive vehicles and at least one auxiliary engine, wherein the auxiliary engine is arranged adjacent to the shaft of the commercial automotive vehicle, said device comprising at least one mechanism that couples and/or decouples the transmission of torque between the at least one auxiliary engine and a free-shaft differential assembly, wherein a control system sends at least one signal for coupling and/or decoupling the transmission of torque between the at least one auxiliary engine and a free shaft differential assembly, wherein the mechanism that couples and/or decouples the torque transmission comprises at least one actuator connected with at least one displacement shaft and at least one motion transmission fork connected to the at least one displacement shaft.

2 . The device according to claim 1 , wherein the free differential assembly comprises:

a) a differential provided with at least one sprocket wheel; and

b) at least one gear connected with independent rotation to the differential by means of at least one set of bearings, wherein the gear is coupled to at least one reducer assembly of the auxiliary engine.

3 . The device according to claim 2 , wherein the mechanism that couples and/or decouples the torque transmission comprises:

a) at least one sleeve coupling associated with the motion transmission fork comprising rotational movement with respect to the motion transmission fork; and

b) the sleeve coupling is coupled to the sprocket wheel of the free differential assembly.

4 . The device according to claim 3 , wherein the differential can be associated with the gear through the sleeve coupling, transmitting torque and rotation between the differential and the gear to each other.

5 . The device according to claim 3 , further comprising at least one state identification sensor associable to at least one end of the displacement shaft, said state identification sensor supplies the control system with parameters captured on the position of the displacement shaft.

6 . A method of controlling the coupling and/or decoupling between a shaft of commercial automotive vehicles 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 motor rotation is synchronized with the shaft rotation, during a coupling period (A) initiated by a command of the drive auxiliary engine vehicle;

b) displacement of a displacement shaft of the device by the actuator from an initial position, transmitting the movement of said displacement shaft to a sleeve coupling 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 displacement 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 displacement shaft to the initial position, transmitting the movement of said displacement 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 motor and the shaft, ending the decoupling period (D).

7 . The method, according to claim 6 , further comprising an initial step of receiving at least one position parameter of a displacement shaft of the device by the control system of the device, depending on the receipt of a command from the vehicle, said position parameter sent to the control system by at least one state identification sensor associable to at least one end of the displacement shaft.

8 . The method, according to claim 7 , further comprising the following steps that end up the coupling period (A) and start the working period (T):

a) the coupling between the gear and the differential given by the sleeve coupling; and

b) receiving, by the control system of the device, at least one new position parameter of the displacement shaft sent to the system by the state identification sensor.

9 . A commercial automotive vehicle comprising at least one shaft associated with at least one auxiliary engine equipped with a reducer assembly associated with a differential, wherein the differential is a free differential assembly, being associated with the shaft and associated with at least one torque transmission coupling and/or decoupling device between said auxiliary motor and the shaft, wherein the coupling and/or decoupling is in response to at least one signal sent by a control system of the device, wherein the at least one torque transmission coupling and/or decoupling device comprises a mechanism for coupling and/or decoupling the torque transmission comprising an actuator connected with a displacement shaft and a motion transmission fork connected to the displacement shaft, said actuator displacing the motion transmission fork by means of the displacement shaft.

10 . An auxiliary shaft for commercial automotive vehicle powered by energy in a regenerative manner, comprising at least one auxiliary engine equipped with a reducer assembly which is associated with the auxiliary shaft through at least one free differential assembly, said differential being associated to at least one torque transmission coupling and/or decoupling device between said auxiliary motor and the shaft, in response to at least one signal sent by a control system of the device, wherein the at least one torque transmission coupling and/or decoupling device comprises a mechanism for coupling and/or decoupling the torque transmission comprising an actuator connected with a displacement shaft and a motion transmission fork connected to the displacement shaft, said actuator displacing the motion transmission fork by means of the displacement shaft.

11 . A method of controlling for operating an auxiliary engine in commercial automotive vehicles, wherein the auxiliary engine operates as i) auxiliary traction, ii) regeneration and iii) freewheeling, the method comprising a step of coupling/decoupling the auxiliary engine to at least one shaft of the commercial automotive vehicle, wherein:

a control system capturing vehicle parameters and identifying a demand for i) auxiliary traction, ii) regeneration or iii) freewheeling, and sends a coupling or decoupling signal between the auxiliary engine and the vehicle shaft, wherein the coupling or decoupling is performed by a mechanism for coupling and/or decoupling comprising an actuator connected with a displacement shaft and a motion transmission fork connected to the displacement shaft, said actuator displacing the motion transmission fork by means of the displacement shaft.