Control system for controlling a scarification and recycling assembly

Abstract

A control system (13) for a scarification and recycling assembly (1) for the restoration of a road pavement (P), comprises: a dosing unit (15), adapted to adjust an amount of a regenerating fluid to be dispensed through a regenerating fluid dispensing device (40) of the scarification and recycling assembly (1), the regenerating fluid being adapted to allow the cohesion between granules of milled conglomerate material (C) to be recompacted in order to allow the restoration of the road pavement (P ); and an electronic control unit (17) configured to receive a signal representative of the advancement speed of the scarification and recycling assembly (1) along the advancement path on the working surface (S) of the road pavement (P ) and to control the dosing unit (15) so as to adjust the amount of regenerating fluid to be dispensed as a function of said advancement speed and as a function of data relating to the physical features of the regenerating fluid to be dispensed.

Description

CONTROL SYSTEM FOR CONTROLLING A SCARIFICATION AND RECYCLING ASSEMBLYDESCRIPTIONField of the invention

[0001] The present invention relates to a road surface scarification and recycling assembly, intended to remove layers of asphalt or the like and to cold-recycle them for the direct repositioning on the road pavement portion just removed, the scarification and recycling assembly being adapted to be connected or attached to a movable arm of a mini-loader, a tractor or an operating machine which preferably has at least one fluidic power take-off, or a mechanical or electrical power take-off , to power the drive means of such an assembly, as well as a control system for controlling such an assembly .

[0002] In particular, the present invention relates to such an assembly, an operating machine to which such an assembly may be attached, a control system for controlling such an assembly and possibly such an operating machine, as well as a method for restoring the road surface implemented by means of such an assembly .

[0003] In particular, within the scope of the presentinvention, reference is made to a scarification and recycling assembly for " cold" restoration of the road pavement , or, without heating the material to be recycled, but at most involving the heating of water and / or regenerating fluid added to or mixed with such a material to be recycled, thus maintaining the mixing step at room temperature .Background art

[0004] It is known to use excavation devices connectable to operating machines, such as earth-moving machines , e . g . , excavators or bulldozers or wheeled or tracked loaders for removing layers of asphalt or the like .

[0005] It is also known that for the resurfacing of road pavements , it is possible to cold-recycle the bituminous layers removed from the road surface, on site, so as to repair deteriorated road surfaces , e . g . , with potholes or cracks in the surface .

[0006] Generally, in cold recycling, the deteriorated bituminous layers are scarified and shredded and the milled material thus obtained is then regenerated with the addition of binders and then compacted and laid out again on the road surface .

[0007] An example of such an application is shown byinternational patent application WO 2023 / 089547 Al in the name of the Applicant .

[0008] The control of such operating machines and of the scarification and recycling assembly carried by the latter is particularly onerous, and requires caution, precision and specific training for the operator who is driving . In particular, in addition to the control of the operating machine itself , it is necessary to control the recycling parameters, and in particular it is necessary to check that, during the mixing of the scarified and shredded material, a suitable amount of regenerating fluid is added, i . e . , a fluid capable of allowing the cohesion between the granules of the milled conglomerate, and therefore allowing the road surface to be restored, once the milled and regenerated conglomerate has been recompacted .

[0009] In particular, as a function of the regenerating fluid specifically used, it will be necessary to use a different amount in relation to the mass of scarified and shredded material . Furthermore, the same mass amount of scarified and shredded material sent for recycling inside the scarification and recycling assembly may vary as a function of the physical parameters relating to the assembly (width and depth of milling) and movement thereof( speed and direction of movement ) . The set of these parameters and the interaction thereof is barely controllable in an optimal manner by a human operator using a scarification and recycling assembly of this type . Summary of the invention

[0010] Therefore, the need is still strongly felt to automatically and precisely control the operations for using such a scarification and recycling assembly, so as to speed up and make the road surface resurfacing procedure more precise, especially for relatively large surfaces of a deteriorated road surface .

[0011] This and other objects are fully achieved according to the present invention by virtue of a control system as defined in the appended independent claim 1 , a scarification and recycling assembly as defined in claim 9, an operating machine as defined in claim 17 , and a method for restoring the road surface as defined in claim 19.

[0012] Advantageous embodiments of the invention are specified in the dependent claims , the content of which is to be considered an integral part of the following description .Description of the drawings

[0013] Further features and advantages of the inventionwill become apparent from the description provided below of preferred exemplary embodiments thereof , given by way of non-limiting indication, with reference to the accompanying drawings , in which :

[0014] - Figure 1 schematically depicts the control system according to an embodiment of the first aspect of the invention;

[0015] - Figure 2 depicts the scarification and recycling assembly according to an embodiment of the second aspect of the invention, in which the wired connection with an input-output device is shown schematically;

[0016] - Figure 3 depicts the scarification and recycling assembly according to an embodiment of the second aspect of the invention, in which the wireless connection with two input-output devices is shown schematically;

[0017] - Figure 4 depicts, in an axonometric view, an exploded view of a scarification and recycling assembly according to an embodiment of the invention;

[0018] - Figure 5 shows an axonometric view of the scarification and recycling assembly in which the external casing has been artificially removed to see the internal components, according to an embodiment of the invention;

[0019] - Figure 6 shows an axonometric top view of the scarification and recycling assembly according to an embodiment of the invention;

[0020] - Figure 7 shows a further axonometric view of the scarification and recycling assembly in Figure 6, in which an interception device is in the open configuration;

[0021] - Figure 8 shows a further axonometric view of the scarification and recycling assembly in Figure 6, in which an interception device is in the closed configuration;

[0022] - Figure 9 shows a side section view of a scarification and recycling assembly according to an embodiment of the present invention, mounted on an operating machine, in particular a mini-loader, having a movable arm of operating machine to which the scarification and recycling assembly is connected, during a step of milling and processing the deteriorated asphalt, in which an interception device is in the open configuration;

[0023] - Figure 10 shows a side view of a second step of processing the road surface, preferably subsequent to the step in Figure 9, according to an embodiment of the method for restoring a road surface, in which a binder is spread;

[0024] - Figure 11 shows a side section view of a scarification and recycling assembly mounted on an operating machine, in particular a mini-loader, having a movable arm of operating machine to which the scarification and recycling assembly is connected, during a processing step of the method for restoring the road surface and in which the advancement direction of the operating machine is opposite to the advancement direction Y in Figure 9 ;

[0025] - Figure 12 shows a side section view of a scarification and recycling assembly mounted on an operating machine, in particular on the back of a tractor with a hydraulic power take-off , during a processing step of the method for restoring the road surface;

[0026] - Figure 13 shows a side section view of a scarification and recycling assembly mounted on an operating machine, in particular on the back of a tractor with a mechanical power take-off , during a processing step of the method for restoring the road surface;

[0027] - Figure 14 depicts the scarification and recycling assembly according to an embodiment of the second aspect of the invention, wherein a depth detecting device is visible, which here comprises angular sensors arranged on the strip adjustment arm, and isdiagrammatically shown connected to the electronic control unit ;

[0028] - Figure 15 depicts the scarification and recycling assembly according to an embodiment of the second aspect of the invention, wherein a depth detecting device is visible, which here comprises an ultrasonic sensor facing the working surface of the road pavement, diagrammatically connected to the electronic control unit ;

[0029] - Figure 16 depicts the scarification and recycling assembly according to an embodiment of the second aspect of the invention, wherein a depth detecting device is visible, which here comprises appropriate sensors on the jacks, and is diagrammatically shown connected to the electronic control unit ;

[0030] - Figure 17 depicts the scarification and recycling assembly according to an embodiment of the second aspect of the invention, wherein a speed detecting device is visible, which here comprises a radar sensor facing the working surface of the road pavement, shown diagrammatically connected to the electronic control unit ;

[0031] - Figure 18 depicts the scarification and recycling assembly according to an embodiment of the second aspect of the invention, wherein a speed detecting device is visible, which here comprises a tone wheel, oran encoder associated with the rotation of the drive means , shown diagrammatically connected to the electronic control unit ;Detailed description

[0032] With reference to the accompanying Figures , reference numeral 1 indicates , as a whole, a cold scarification and recycling assembly 1 for the restoration of a deteriorated road surface P, or having potholes or cracks at least on the most superficial layer thereof . A control system according to the present invention may be used, for example, in the cold scarification and recycling assembly shown in international patent application WO 2023 / 089547 Al in the name of the Applicant , and therefore combined with all the constructional features described therein .

[0033] The cold scarification and recycling assembly 1 (or, more simply, the scarification and recycling assembly 1 ) is an integrated assembly which performs both the functions of scarification of the road pavement and cold recycling (or, regeneration of the resurfacing conglomerate) in a single machine . Such a scarification and recycling assembly 1 is further adapted to be directly connected to a movable arm of an operating machine 2 , or to a mini-loader or to a tractor . As more clearly visiblein Figures 9 and 11 to 13, it is apparent that the scarification and recycling assembly 1 may be configured either to be pushed or towed by the operating machine 2 , depending on the processing needs . For example, the scarification and recycling assembly 1 may be hooked to the back of a tractor, as shown in Figures 12 and 13 , or to a loader or mini-loader, as shown in Figures 9 and 11 , moved forward or rearward .

[0034] Depending on the operating configuration, the scarification and recycling assembly 1 is thus configured so that a scarification unit 10 thereof is always in front of a recycling unit 20 thereof in the advancement direction Y .

[0035] It is apparent that , in this disclosure, the term scarifying or scarification also means the operation of milling the road surface .

[0036] It should be noted that , unless otherwise specified, the terms "axial" , "radial" or "tangential" will always refer to a rotation axis .

[0037] The scarification and recycling assembly 1 is movable in a working direction (or advancement direction) Y while maintaining sliding contact with the plane of the road pavement P , for example by means of abutment runners81 and 82 ; such abutment runners 81 , 82 may be mutuallyarranged side by side and spaced apart, in front of each other, and for example they are made with folded metal sheets .

[0038] According to the second aspect of the invention, the scarification and recycling assembly 1 essentially comprises a scarification unit 10 , a recycling unit 20 , drive means 102 , 202 , an interception device 30 , a regenerating fluid dispensing device 40 , and a control system 13 ; the latter forms itself a first aspect of the invention and will be described below .

[0039] The scarification unit 10 is accommodated in a first region D of the scarification and recycling assembly 1 . Such a scarifying assembly 10 comprises an excavation tool 100 for removing the conglomerate material of one or more layers of asphalt along a linear advancement path along a working surface S of the road pavement P , to obtain a scarified conglomerate material C .

[0040] The recycling unit 20 , on the other hand, is accommodated in a second region R of the scarification and recycling assembly 1 . Such a recycling unit 20 comprises a mixing and shredding element 200 for the scarified conglomerate material C . Such a second region R is arranged downstream of the first region D, so that the scarified conglomerate material C (or milled conglomerateC) from the scarification unit 10 is receivable by the recycling unit 20 for the regeneration thereof into regenerated conglomerate material CR (or milled and regenerated conglomerate CR) .

[0041] The drive means 102 , 202 are adapted to move the excavation tool 100 and the mixing and shredding element 200 and are configured for this purpose ; for example, the drive means 102 , 202 may be of the hydraulic type, such as hydraulic actuators, or of the electric type, such as electric motors .

[0042] The interception device 30 at least partially separates the first region D from the second region R to convey the passage of the milled conglomerate material C from the first region D to the second region R. According to an embodiment , the interception device 30 is adapted to remain resting on the bottom of the road surface being processed and to be passively guided to translate along a translation direction Z, to follow the profile of the bottom of the road surface being processed . According to one embodiment, the interception device 30 is actively movable to a closing configuration and an opening configuration . In the closing configuration, the interception device 30 prevents the passage of milled conglomerate material C from the scarification unit 10 ,i . e . , from the first region D, to the recycling unit 20 , i . e . , to the second region R. In the opening configuration, the interception device 30 allows the passage of milled conglomerate material C from the scarification unit 10 , i . e . , from the first region D, to the recycling unit 20 , i . e . , to the second region R.

[0043] According to one embodiment, the interception device 30 comprises a translatable bulkhead 30 ' to determine the opening or closing of the conglomerate passage opening 22 . In the embodiment in which the interception device 30 is adapted to remain resting on the bottom of the road surface being processed and to be passively guided to translate along a translation direction Z , to follow the profile of the bottom of the road surface being processed, the bulkhead 30 ' is adapted to remain resting on the road surface, by variably closing or opening the conglomerate passage opening 22 as a function of the profile of the road surface and the working depth . Generally, the bulkhead 30 ' preferably acts as a scraper bulkhead for the bottom of the road surface and prevents the direct passage of the milled conglomerate C under a sieving element 50 (which will be described below) from occurring without first passing through the recycling unit 20 , when the conglomerate passage opening22 is at least partially open . However, when the bulkhead 30 ' is in a configuration in which it completely closes the conglomerate passage opening 22 , then the bulkhead 30 ' prevents the passage of the milled conglomerate material C or the regenerated conglomerate material CR towards the second region R, i . e . , towards the recycling unit 20 . The movement of such a bulkhead 30 ' may be actuated by a suitable movement unit, and the movement thereof may be constrained to suitable sliding guides , in a manner known per se .

[0044] The regenerating fluid dispensing device 40 is adapted to dispense regenerating fluid directly into the first region D and / or into the second region R .

[0045] The regenerating fluid is a fluid adapted to allow the cohesion between the granules of the milled conglomerate again, so as to allow the restoration of the road surface, once the milled and regenerated conglomerate has been recompacted . Therefore, the term regenerating fluid also means an additive fluid or a bituminous binder . For example, the regenerating fluid is a mixture of bitumen or a mixture containing a hydrocarbon binder . Advantageously, the regenerating fluid is preferably the fluid sold under the trade name Iterlene ACF 1000 HP GREEN from the company Iterchimica Sri, Bergamo, Italy . It isapparent that the present invention also relates to the use of a regenerating fluid, and in particular the use of the fluid sold under the trade name Iterlene ACF 1000 HP GREEN from the company Iterchimica Sri, Bergamo, Italy, for the cold restoration of a road surface directly on the road, and more in particular the use in a scarification and recycling assembly 1 according to the present invention or the use in a method for restoring a road surface according to the present invention (described below in the present description) .

[0046] As anticipated, preferably, the scarification and recycling assembly 1 further comprises a sieving element 50 , arranged downstream of the recycling unit 20 and adapted to receive the regenerated conglomerate material CR and to sieve a predefined granule size of regenerated conglomerate material CR for the transfer to the working surface S . The sieving element 50 is an element adapted to prevent the passage of a certain size of milled conglomerate material C or regenerated conglomerate material CR to keep it under milling in the recycling unit 20 until a desired size, typically a finer size, of the granules of the material is reached, which is then discharged downstream of the sieving element, for example because it passes through the openings or meshesof the sieving element 50 . Therefore, the sieving element 50 allows the passage of the granules of the milled conglomerate material C or the regenerated conglomerate material CR from the recycling unit 20 towards the working surface S only upon reaching a desired size of the granules ( i . e . , only discharging the milled conglomerate material or the regenerated conglomerate CR with a given size) . According to a preferred embodiment, the sieving element 50 is a perforated wall or a grid, having sieving openings , and arranged below the mixing and shredding element 200 , in the vertical direction perpendicular to the plane of the road pavement P . Therefore, the sieving element is the last element that the regenerated conglomerate CR encounters before being released onto the working surface S of the road pavement P .

[0047] The scarification and recycling assembly 1 may comprise depth excavation adjustment means, known per se .

[0048] According to one embodiment, the excavation tool 100 is a milling drum rotatable or mounted to rotate about a milling drum rotation axis X substantially parallel to the working surface S of the road pavement P . The milling drum is provided with cutting elements 101 to remove the conglomerate material of the road surface .

[0049] According to one embodiment, the mixing andshredding element 200 is a mixing drum, rotatable or mounted to rotate about a mixing drum rotation axis X ' parallel to and spaced apart from the milling drum rotation axis X . The mixing drum is preferably provided with protruding elements 201 , e . g . , elements projecting radially with respect to the mixing drum rotation axis X ' .

[0050] Preferably, the scarification unit 10 comprises a scarification chamber 11 in which the excavation tool 100 is accommodated and the recycling unit 20 comprises a recycling chamber 21 in which the mixing and shredding element 200 is accommodated . The scarification chamber 11 and the recycling chamber 21 are directly communicating with each other by means of a conglomerate passage opening 22 adapted to be opened or closed by means of the interception device 30 .

[0051] As anticipated, according to a first aspect, the invention is directed to a control system 13 , used to control the scarification and recycling assembly during the process of restoring the deteriorated road surface P .

[0052] The control system 13 essentially comprises a dosing unit 15 and an electronic control unit 17 . According to various embodiments, the control system 13 may further comprise all or some of a depth detecting device 51 and / or a temperature sensor 53 and / or an input-output device 55 and / or a speed detecting device 60 : these additional components will be described in more detail below .

[0053] The dosing unit 15 is adapted to adjust the amount of regenerating fluid to be dispensed by means of the regenerating fluid dispensing device 40 . Preferably, the regenerating fluid dispensing device 40 comprises one or more dispensing nozzles having a dispensing mouth directly facing the scarification chamber 11 and / or the recycling chamber 21 .

[0054] The dosing unit 15 preferably comprises means for storing water and regenerating fluid and pumping means 16 for dispensing water or regenerating fluid from the storage means to the regenerating fluid dispensing device 40 .

[0055] It is apparent that the dosing unit 15 may be installed on the assembly 1 or may be located on the operating machine 2 and comprise fluidic means for supplying the regenerating fluid or water towards the regenerating fluid dispensing device 40 .

[0056] The electronic control unit 17 comprises a computer, or a processor, and a storage unit , in a manner known per se . The electronic control unit 17 is configured to receive a signal representative of the advancementspeed in the advancement direction Y of the scarification and recycling assembly 1 along the advancement path on the working surface S of the deteriorated road pavement P to be repaired . As a function of such an advancement speed and also of data or information relating to the physical features of the regenerating fluid to be dispensed, the electronic control unit 17 is configured to control the dosing unit 1 , or is configured to control the amount of regenerating fluid to be dispensed from the storage means to the regenerating fluid dispensing device 40 . As is apparent , such an amount depends on the amount of scarified conglomerate material C to be regenerated, which in turn depends on the advancement speed of the scarification and recycling assembly 1 , but also depends on the physical features of the dispensed fluid . In particular, such data relating to the physical features of the fluid to be dispensed preferably comprise at least the fluid viscosity, and in the most preferable embodiment of the invention, both the viscosity and the density of the fluid . Even more advantageously, such physical features of the fluid to be dispensed comprise inherent features identifying the type of fluid (and hence they do not only concern the physical features varying as a function of environmental conditions , such as temperature and / orpressure ) .

[0057] Preferably, the electronic control unit 17 is also configured to control the drive means 102 and 202 , and / or the movement of the interception device 30 , advantageously as a function of the advancement speed of the scarifying assembly 1 and the data relating to the physical features of the fluid to be dispensed, so as to control the scarifying and milling processes . It is thus possible, for example, to obtain a specific size of the scarified conglomerate material C to be sent to the mixing and shredding element 200 , since the physical features of the regenerating fluid, such as the viscosity, may also impose a dimensional requirement on the size or cause an optimal mixing and recompacting only within predetermined dimensional ranges of the scarified conglomerate material C .

[0058] In order to generate the signal representative of the advancement speed of the scarification and recycling assembly 1 , different methods and related devices may be used according to the invention .

[0059] For example, according to an embodiment , the scarification and recycling assembly 1 comprises a speed detecting device 60 , which is adapted to generate such a signal and is configured to transmit it to the electroniccontrol unit 17 .

[0060] According to an embodiment, the speed detecting device 60 comprises , for example, a speed detector such as an electronic device for detecting the linear advancement speed, or the like .

[0061] In one embodiment, shown in Figure 17 , the speed detecting device 60 comprises a radar- or lidar-type sensor 60 ' , the operation of which is known per se, which is mounted facing the working surface S of the road pavement , and which is configured to determine the advancement speed of the scarification and recycling assembly 1 . Although only one radar- or lidar-type sensor 60 ' is shown in Figure 17 , nothing prevents the scarification and recycling assembly 1 from comprising more than one sensor of such a type, and therefore the signal representing the advancement of the scarification and recycling assembly 1 from being generated taking into account the detections of all such sensors, for example as an average of a plurality of detections .

[0062] In one embodiment, shown in Figure 18 , the speed detecting device 60 comprises a tone wheel or an encoder 60 ' ' , connected to the excavation tool 100 so as to determine an angular rotation speed, and as a consequence, to generate a signal representative of the advancementspeed of the scarification and recycling assembly 1 .

[0063] In one embodiment, not shown in the Figure, but possibly combinable with that shown in Figures 17 and 18 , and with the others described herein, the speed detecting device 60 comprises a satellite transceiver adapted to transmit its position to a global positioning satellite system, such as a GPS, in a manner known per se . In this case, the speed detecting device 60 is configured to generate the signal representative of the advancement speed of the scarification and recycling assembly 1 from at least two subsequent positions transmitted to the global positioning satellite system.

[0064] According to one embodiment, the speed detecting device 60 comprises a wheel 61 and a wheel support assembly 62 adapted to support the wheel in a rotatable manner about a wheel rotation axis X' ' . The wheel support unit 62 is adapted to position the wheel in a rearward configuration A, in which the wheel is spaced apart from the plane of the road pavement P , and in a working configuration W, in which the wheel is in contact with the road pavement P during advancement of the cold scarification and recycling assembly 1 . Preferably, the speed detecting device 60 comprises a wheel rotation speed sensor, e . g . , an electronic encoder . In this embodiment,more preferably, the wheel support unit 62 comprises a wheel support arm 63 . Optionally, the wheel support unit 62 comprises arm movement drive means .

[0065] The wheel support arm 63 is rotatable about an arm rotation axis X' ' ' parallel to and spaced apart from the wheel rotation axis X' ' . This way, for example, the wheel support arm 63 is configurable with the main extension axis thereof parallel to the plane of the road surface P when the assembly is in operation or perpendicular (i . e . , vertical) with respect to the plane of the road pavement P when not in operation or when it is not necessary to measure the advancement speed of the assembly 1 , as shown in Figure 9, for example, in the first scarification (milling) step .

[0066] Optionally, as anticipated, according to an embodiment, the control system 13 of the scarification and recycling assembly 1 may also comprise the depth detecting device 51 , configured to detect a scarification depth of the road pavement with respect to the plane of the road pavement P . The depth detecting device 51 generates a signal representative of the scarification depth and transmits it to the electronic control unit 17 , which is, in this embodiment , configured to control the dosing unit 15 so as to adjust the amount of regenerating fluid to bedispensed, not only as a function of the advancement speed of the scarification and recycling assembly 1 and the data relating to the physical features of the fluid to be dispensed, but also as a function of the detected scarification depth . Indeed, the amount of scarified conglomerate material C to be regenerated clearly depends not only on the advancement speed of the scarification and recycling assembly 1 , but also on the scarification depth .

[0067] According to an embodiment, the depth detecting device 51 is operatively connected to the dosing unit 15 and is adapted to detect the scarification depth D' of the road pavement P by the scarifying unit 10 with respect to the plane of the road pavement P .

[0068] It is clear that the scarification and recycling assembly 1 may comprise only the speed detecting device 60 , or both the speed detecting device 60 and the depth detecting device 51 .

[0069] According to an embodiment, the depth detecting device 51 comprises , for example, a distance detector such as a laser, optical, ultrasonic, or mechanical distance detector . An example is shown in Figure 15, in which the depth detecting device 51 comprises a pair of ultrasonic sensors 51 ' , arranged on the sides of the scarification unit, and facing the working surface S of the roadpavement P and configured to determine the scarification depth D' of the scarification and recycling assembly 1 .

[0070] According to an embodiment, shown in Figure 14 , the depth detecting device 51 comprises at least one angular sensor 51 ' ' , arranged so as to detect the variation of angular position, from a known angular position, of an adjustment device (e . g . , of the type described in international patent application WO 2023 / 089547 Al in the name of the Applicant ) adapted to adjust the excavation depth D' , to thus determine the actual excavation depth D' .

[0071] In a further embodiment shown in Figure 16, possibly combinable with that just described, the depth detecting device 51 comprises a pair of depth sensors 51 ' ' ' , arranged operatively connected to linear actuators configured to control the scarification depth D' of the scarification unit 10 .

[0072] Preferably, in the embodiment in which the speed detection device 60 comprises the wheel support unit 62 , the latter further comprises an angular arm position sensor adapted to determine the milling depth of the scarification and recycling assembly 1 as a function of the angular position of the wheel support arm 63 (thus acting as a depth detecting device 51 ) .

[0073] When present, the temperature sensor 53 is arranged so as to detect the temperature of the regenerating fluid to be dispensed, for example upstream of the regenerating fluid dispensing device 40 , or at the regenerating fluid storage means and / or the pumping means 16 for dispensing the regenerating fluid from the storage means to the regenerating fluid dispensing device 40 of the dosing device 15 . The temperature sensor 53 is thus configured to generate a signal representative of the actual and current temperature of the fluid to be dispensed and to provide such a signal to the electronic control unit 17 . Hence, in this embodiment, the electronic control unit 17 is further configured to control the dosing unit 15 so as to adjust the amount of regenerating fluid to be dispensed not only as a function of the advancement speed and the data relating to the features of the fluid being dispensed, but also as a function of said detected temperature . More preferably, in this case, the scarification and recycling assembly 1 further comprises a heating device 54 adapted to provide heat to the regenerating fluid, when activated by the electronic control unit 17 . The electronic control unit 17 may be configured to, for example, activate the heating device 54 only when the signal received from the temperature sensor53 indicates that the detected temperature is below a predetermined threshold, e . g . , a threshold of 10 ° C .[ 000741 According to the preferred embodiment of the control system 13, this also comprises one or more inputoutput devices 55 . As it can be seen from Figures 1 to 3, the input-output device 55 may be a smartphone, a laptop, a personal computer, generally a portable electronic device, or an electronic device fixed or fixable preferably inside a driving cabin of an operating machine 2 (which will be described below) . Advantageously, the electrical power supply of the input-output device 55 is compatible with a conventional cigarette lighter socket arranged in such a cabin . The connection between the input-output device 55 and the electronic control unit 17 may be obtained either by means of wires or cables, both fixed and removable, or wirelessly, e . g . , by means of Bluetooth or Wi-Fi . By virtue of such a connection, the transmission and exchange of data between the input-output device 55 and the electronic control unit 17 is possible . The input-output device 55 is preferably usable by an operator of the scarification and recycling assembly 1 , at least for inputting data relating to the physical features of the regenerating fluid to be dispensed and for transmitting such data to the electronic control unit 17 .The data relating to the physical features of the fluid may be, for example, pre-stored in the electronic control unit 17 , or may be input by means of the input-output device 55, or even stored with reference to a plurality of fluids and selected by means of the input-output device 55 . Furthermore, it is possible for the input-output device 55 to be configured, by means of a suitable camera, to scan such data relating to the fluid to be dispensed, for example by being configured to scan a label with a QR code, or by scanning a text on a label and identifying the data from such a text . In addition to the data relating to the fluid to be dispensed, an operator could send further information to the electronic control unit 17 by means of the input-output device 55, e . g . , data relating to the size or width of the scarification unit 10 mounted on board the scarification and recycling assembly 1 , or relating to the scarification depth D ’ to be set , or relating to a target advancement speed or a limit advancement speed which must not be exceeded and / or to be maintained as a minimum level . The input-output device 55 may also be configured, preferably, to control, by means of the electronic control unit 17 , the operation of the regenerating fluid dispensing device 40 , so as to allow an operator to bypass the automatic control provided by theelectronic control unit 17 and manually activate or deactivate the dispensing . It is also possible that the input-output device 55 is configured to allow the operator to control the activation and / or deactivation of the heating device 54 using the input-output device itself .

[0075] In one embodiment, the electronic control unit 17 is further configured to transmit to the input-output device 55 data or information indicative of a non-optimal operating condition of the scarification and recycling assembly 1 , e . g . , a condition in which the regenerating fluid is not sufficient , or a fault condition . Such data or information may have been obtained by the electronic control unit 17 by means of dedicated sensors, or deduced, i . e . , determined, from other parameters , data or information already available to the electronic control unit 17 .

[0076] Preferably, the input-output device 55 has or is associated with a monitor, on which an advancement speed indicator 56 and even more preferably a colored signal indicative of a too slow advancement speed, or a too fast advancement speed, or an advancement speed correctly within an acceptability range, is displayed .

[0077] In a particularly preferable embodiment , the control system 13 is designed to implement a closed-loopcontrol logic with respect to the amount or flow rate of dispensed regenerating fluid, for example by means of a proportional-integrative-derivative control . For this purpose, the control system 13 may comprise a flow rate measuring device, such as a flow meter, for example, configured to measure or detect in real time, or instant by instant , or during a plurality of subsequent measurement instants , the flow rate of regenerating fluid which is actually dispensed by the regenerating fluid dispensing device 40 , or which is actually sent or pumped to the regenerating fluid dispensing device 40 by the dosing unit 15 . In this case, the electronic control unit 17 is further configured to receive from the flow rate measuring device one or more signals representative of such measurements, and to control the dosing unit 15, and / or to control the regenerating fluid dispensing device 40 , so as to adjust the amount of regenerating fluid to be dispensed at a given instant as a function of the flow rate of regenerating fluid actually dispensed measured by the flow rate measuring device in the immediately previous instant . This type of closed-loop control may be, for example, used so as to be implemented in real time or almost in real time, or continuously, or so as to be implemented in subsequent time instants . Clearly, theshorter the time interval between the instant of time to which the measurement of the flow rate of the regenerating fluid actually dispensed refers and the next instant of time for which the flow rate of regenerating fluid to be dispensed is established by the electronic control unit 17 also as a function of such a measurement, the more precise the control of the regenerating fluid dispensing .

[0078] It is clear that the present invention also relates to an operating machine 2 , such as a multifunctional operating machine, for example, such as a mini-loader, or a loader, comprising a scarification and recycling assembly 1 described in the previous paragraphs, for example preferably mounted on the back of a tractor or on the loader arm of a mini-loader . Clearly, such an operating machine 2 is provided with its own engine adapted to supply power either to the driving wheels 3 ( shown in Figure 12 or 13 ) or to the movement tracks 4 ( shown in Figure 9 or 11 ) .

[0079] Such an operating machine 2 is preferably provided with at least one fluidic power take-off 41 to power the drive means 102 , 202 and / or for moving the bulkhead 30 ' and / or the drive means for moving the arm .

[0080] According to a constructional variant, the operating machine 2 is preferably provided with at leastone electrical power take-off to power the drive means102 , 202 and / or for moving the bulkhead 30 ' and / or the drive means for moving the arm .L Q0081 J According to a constructional variant, the operating machine 2 is preferably provided with at least one mechanical power take-off 42 to power the drive means 102 , 202 and / or for moving the bulkhead 30 ' and / or the drive means for moving the arm .

[0082] According to a preferable embodiment of the third aspect of the invention, the electronic control unit 17 of the control system 13 of the scarification and recycling assembly 1 is further configured to communicate, by means of a wired connection or by means of a wireless connection, with a control microprocessor of the operating machine 2 . The control microprocessor may thus control at least one control parameter of the operating machine 2 , e . g . , the advancement speed of the operating machine 2 , or the power transmitted by means of the fluidic power takeoff 41 , or by means of the mechanical 42 or electrical power take-off , or may control at least one brake of the operating machine 2 , as a function of at least one signal received by the electronic control unit 17 and representative of a non-optimal operating condition of the scarification and recycling assembly 1 , e . g . , a conditionin which the regenerating fluid is not sufficient , or a fault condition .

[0083] Furthermore, the present invention also relates to a method for restoring a road surface, which uses an operating machine 2 to which a previously described scarification and recycling assembly 1 is connected . The method, in the most general embodiment thereof, shown for example in Figures 9 to 11 , comprises the following operating steps of :

[0084] providing at least one scarification and recycling assembly 1 ;

[0085] possibly, providing an operating machine 2 on which said scarification and recycling assembly 1 is mounted;

[0086] c' ) moving the scarification and recycling assembly 1 on the deteriorated road surface, preferably with the interception device 30 in the opening configuration, so as to obtain a milled conglomerate C, and preferably simultaneously injecting regenerating fluid and possibly water on the milled conglomerate C being processed by the scarification and recycling assembly 1, preferably in a single pass in the advancement direction Y of the operating machine ;

[0087] d) preferably simultaneously to step c)injecting regenerating fluid onto the milled conglomerate being processed by the scarification and recycling assembly 1 , by controlling the dosing unit 15, or by controlling the dosing unit 15 by means of the electronic control unit 17 , so as to adjust the amount of regenerating fluid to be dispensed as a function of the advancement speed of the scarification and recycling assembly 1 and as a function of the data relating to the physical features of the regenerating fluid to be dispensed, preferably as a function of the viscosity of the fluid to be dispensed;

[0088] e ) allowing the regenerated milled conglomerate CR to escape downstream of the recycling unit 20 ; and

[0089] g) possibly, placing a binder L, e . g . , cement , on the milled conglomerate ( see Figure 10 ) .

[0090] Preferably, in step d) , the injection of regenerating fluid may further comprise :

[0091] - measuring the scarification depth of the road pavement with respect to the level of the road pavement P, for example by means of the depth detecting device 51 ;

[0092] - further controlling the dosing unit 15, or controlling the dosing unit 15 by means of the electronic control unit 17 , so as to adjust the amount of regenerating fluid to be dispensed also as a function ofthe detected scarification depth.

[0093] In an embodiment, the method may further comprise the step of:

[0094] h) allowing the milled and regenerated conglomerate CR to escape from the recycling chamber 21, preferably by means of the sieving element 50.

[0095] Preferably, the method further comprises the operating step of:

[0096] f) smoothing and compacting the milled and regenerated conglomerate CR (a step known per se, not shown in the Figures) .

[0097] According to an embodiment, step d) includes also injecting water or, more generally a liquid, onto the milled conglomerate being processed in the scarification chamber 11 and / or in the recycling chamber 21, for example to suppress dust.

[0098] Finally, according to a particularly advantageous embodiment of the method, this further comprises the steps of:

[0099] w) detecting, for example by means of the speed detecting device 60, the advancement speed of the scarification and recycling assembly 1, or possibly of the operating machine 2 on which it is mounted, along the advancement path on the working surface S of the roadpavement P ;[ 000100 ] x) comparing, or comparing by means of the electronic control unit 17 , the detected advancement speed with a desired minimum value and / or with a desired maximum value ;[ 000101 ] y) as a function of the outcome of step x) , controlling the advancement speed so as to bring it above the desired minimum value and / or below the desired maximum value ; and[ 000102 ] z ) possibly, controlling the drive means 102, 202 as a function of the advancement speed detected . [ 000103 ] It is clear that step y) may be performed manually by the operator, or the electronic control unit 17 may be configured to control the engine of the operating machine 2 and thus to control the advancement speed thereof .[ 000104 ] Finally, for the embodiments of the invention in which the control system 13 is designed to implement a closed-loop control logic, step d) of the restoration method may further comprise :- by means of a flow rate measuring device, measuring, instant by instant, a flow rate of regenerating fluid actually dispensed by the regenerating fluid dispensing device 40 of the scarification and recycling assembly 1 ;and[ 000105 ] further controlling the dosing unit 15 so as to adjust the amount of regenerating fluid to be dispensed at a given instant also as a function of the flow rate of regenerating fluid actually dispensed measured by the flow rate measuring device in the immediately previous instant . [ 000106] Clearly, the features described above with reference to the control system 13 configured to implement a closed-loop control logic also apply by analogy to the restoration method just described .[ 000107 ] As it is apparent from the description, the present invention is suitable for overcoming the complained disadvantages relating to the prior art .[ 000108 ] More precisely, the scarification and recycling assembly of the present invention allows restoring a deteriorated road surface without the need to remove and take the road surface material elsewhere, but by regenerating the same removed material and redepositing it again on the road surface .[ 000109] This allows an immediate repair of the road surface, carried out entirely on site, without the addition (or possibly with minimal addition) of further conglomerate material . Therefore, a repair intervention is obtained in a short time and at low costs .[ 000110 ] In particular, the possibility of in-line dosing ( i . e . , during advancement of the scarification and recycling assembly or the operating machine carrying it ) the amount of regenerating fluid and water in a controlled manner allows making the regeneration procedure more effective and efficient . In fact , the amount of regenerating fluid is adaptable depending on the advancement speed of the scarification and recycling assembly and on the type of conglomerate encountered . Basing the adjustment on the advancement speed of the scarification and recycling assembly, instead of on the advancement speed of the machine or tractor, as is the case in other machines or tractors , allows obtaining a greater precision, since the advancement speed of the assembly and that of the machine or tractor can be different, e . g . , due to roughness of the ground or slippage .[ 000111 ] Furthermore, by virtue of the control provided by the control system according to the invention, the amount of regenerating fluid is also adaptable to the physical features of the fluid to be dispensed, and in particular the viscosity, and possibly the density and / or temperature . In fact , the assembly according to the invention is designed to operate with any type ofregenerating fluid, and by virtue of the control of the electronic control system, the dispensing is always precise and calibrated to the specific regenerating fluid used .[ 000112 ] Lastly, by virtue of the possible presence of an input-output device, the control system according to the invention is versatile and easily usable even by an operator without specific training in relation to the different types of regenerating fluid .[ 000113 ] In order to meet specific, contingent needs, those skilled in the art may make several changes and adaptations to the above-described embodiments and replace elements with others which are functionally equivalent, without however departing from the scope of the following claims .[ 000114 ] Moreover, each variation described as belonging to a possible embodiment may be implemented irrespective of the other variations described .LIST OF REFERENCE SIGNSA rearward configurationC scarified conglomerate material CR regenerated conglomerate material D first region D ' scarification depthP road pavementR second regionS working surfaceW working configurationX milling drum rotation axisX' mixing drum rotation axisX' ' wheel rotation axisX' ' ' arm rotation axisY advancement directionZ translation direction1 scarification and recycling assembly2 operating machine3 driving wheels4 movement tracks10 scarification unit11 scarification chamber13 control system15 dosing unit16 pumping means17 electronic control unit20 recycling unit21 recycling chamber22 passage opening30 interception device30 ' bulkhead40 regenerating fluid dispensing device41 fluidic power take-off42 mechanical power take-off50 sieving element51 depth detecting device51 ' ultrasonic sensors51 ' ' angular sensor51 ' ' ' depth sensors53 temperature sensor54 heating device55 input-output device56 advancement speed indicator60 speed detecting device60 ' radar- or lidar-type sensor60 ' ' encoder61 wheel62 wheel support unit63 wheel support arm81 , 82 abutment runners100 excavation tool101 cutting elements102 , 202 drive means200 mixing and shredding element201 protruding elements

Claims

CLAIMS1. A control system (13) for controlling a scarification and recycling assembly (1) for the restoration of a deteriorated road pavement (P) , the scarification and recycling assembly (1) being adapted to remove conglomerate material of an asphalt layer along an advancement path on a working surface (S) of the road pavement (P) to obtain a milled conglomerate material (C) , the control system (13) comprising:- a dosing unit (15) , adapted to adjust an amount of a regenerating fluid to be dispensed through a regenerating fluid dispensing device (40) of the scarification and recycling assembly (1) , the regenerating fluid being adapted to allow the cohesion between granules of milled conglomerate material (C) to be recompacted in order to allow the restoration of the road pavement (P) ; and- an electronic control unit (17) configured to receive a signal representative of the advancement speed of the scarification and recycling assembly (1) along the advancement path on the working surface (S) of the road pavement (P) and to control the dosing unit (15) so as to adjust the amount of regenerating fluid to be dispensed as a function of said advancement speed of the scarification and recycling assembly (1) and as a function of data relating to the physical features of the regeneratingfluid to be dispensed.

2. A control system according to claim 1, further comprising a depth detecting device (51) configured to detect a scarification depth (D’) of the road pavement with respect to the plane of the road pavement (P) , and wherein the electronic control unit (17) is further configured to control the dosing unit (15) so as to adjust the amount of regenerating fluid to be dispensed as a function of said scarification depth (D’) detected.

3. A control system according to claim 1 or claim 2, further comprising a temperature sensor (53), adapted to detect the temperature of the regenerating fluid to be dispensed, preferably immediately upstream of the regenerating fluid dispensing device (40) , and wherein the electronic control unit (17) is preferably further configured to control the dosing unit (15) so as to adjust the amount of regenerating fluid to be dispensed as a function of said detected temperature.

4. A control system according to claim 3, wherein the electronic control unit (17) is further adapted to control the activation of a heating device (54) adapted to heat the regenerating fluid, when said detected temperature is below a predetermined threshold, for example of 10°C.

5. A control system according to any one of the preceding claims, wherein said data relating to the physicalfeatures of the regenerating fluid comprise at least viscosity, and preferably comprise at least viscosity and density .

6. A control system according to any one of the preceding claims, further comprising an input-output device ( 55 ) adapted to be connected, by means of a wired connection or by means of a wireless connection, to the electronic control unit ( 17 ) for receiving and transmitting data from / to the latter, and preferably adapted to be used by an operator of the scarification and recycling assembly ( 1 ) for inputting data relating to the physical features of the regenerating fluid to be dispensed and transmitting such data to the electronic control unit ( 17 ) .7 . A control system according to claim 6, wherein the electronic control unit ( 17 ) is further configured to transmit to the input-output device ( 55 ) data or information indicative of a non-optimal operating condition of the scarification and recycling assembly ( 1 ) , for example a condition in which the regenerating fluid is not sufficient, or a fault condition .8 . A control system according to any one of the preceding claims, further comprising a flow rate measuring device adapted to measure, instant by instant , a flow rate of regenerating fluid actually dispensed through theregenerating fluid dispensing device (40) of the scarification and recycling assembly (1), and wherein the electronic control unit (17) is further configured to control the dosing unit (15) so as to adjust the amount of regenerating fluid to be dispensed at a given instant as a function of the flow rate of regenerating fluid actually dispensed measured by the flow rate measuring device in the immediately previous instant.

9. A scarification and recycling assembly (1) for restoring a deteriorated road pavement (P) , being integrated and adapted to be directly connected to a movable arm of a mini-loader, a tractor, or an operating machine (2), the scarification and recycling assembly (1) comprising :- a scarification unit (10), accommodated in a first region (D) of the scarification and recycling assembly (1) and comprising an excavation tool (100) for removing conglomerate material of one or more asphalt layers along an advancement path along a working surface (S) of the road pavement (P) , to obtain a milled conglomerate material (C) ;- a recycling unit (20), accommodated in a second region (R) of the scarification and recycling assembly (1) and comprising a mixing and shredding element (200) for the scarified conglomerate material (C) , said second region(R) being arranged downstream of the first region (D) , so that the scarified conglomerate material (C) from the scarification unit (10) is receivable by the recycling unit (20) for the regeneration thereof into regenerated conglomerate material (CR) ;- drive means (102, 202) adapted to move the excavation tool (100) and the mixing and shredding element (200) ;- an interception device (30) which at least partially separates the first region (D) from the second region (R) to convey the passage of the scarified conglomerate material (C) from the first region (D) to the second region (R) ;- a regenerating fluid dispensing device (40) , adapted to dispense regenerating fluid directly into the first region (D) and / or the second region (R) ; and- a control system (13) according to any one of the preceding claims .

10. A scarification and recycling assembly (1) according to claim 9, wherein the interception device (30) is movable in a closing configuration, in which it prevents the passage of conglomerate material from the scarification unit (10), i.e., from the first region, to the recycling unit (20) , i.e., to the second region (R) , and an opening configuration, in which the interception device (30) allows the passage of conglomerate materialfrom the scarification unit (10), i.e., from the first region (D) , to the recycling unit (20) , i.e., to the second region (R) .

11. A scarification and recycling assembly (1) according to claim 9 or 10, wherein the excavation tool (100) is a milling drum rotatable about a milling drum rotation axis (X) substantially parallel to the working surface (S) of the road pavement (P), provided with cutting elements (101) for removing the conglomerate material of the road surface, and wherein the mixing and shredding element(200) is a mixing drum, provided with protruding elements(201) and rotatable about a mixing drum rotation axis (X') parallel to and spaced apart from the milling drum rotation axis (X) .

12. A scarification and recycling assembly (1) according to any one of claims 9 to 11, wherein the depth detecting device (51) of the control system (13) comprises an ultrasonic sensor (51') facing the working surface (S) of the road pavement (P) and configured to determine the scarification depth (D') of the scarification and recycling assembly (1) .

13. A scarification and recycling assembly (1) according to any one of claims 9 to 12, further comprising a speed detecting device (60) adapted to generate the signal representative of the advancement speed of thescarification and recycling assembly (1) along the advancement path on the working surface (S) of the road pavement (P) and transmit such a signal to the electronic control unit (17) .

14. A scarification and recycling assembly (1) according to claim 13, wherein the speed detecting device (60) comprises a wheel (61) and a wheel support unit (62) adapted to support the wheel rotatably about a wheel rotation axis (X' ' ) and adapted to position the wheel in a rearward configuration (A), in which the wheel (61) is spaced apart from the plane of the road pavement (P) , and a working configuration (W) , in which the wheel (61) is in contact with the road pavement (P) during advancement of the scarification and recycling assembly (1), said speed detecting device (60) comprising a wheel rotation speed sensor of the wheel (61) .

15. A scarification and recycling assembly (1) according to claim 14, wherein the speed detecting device (60) comprises a radar or lidar sensor (60') facing the working surface (S) of the road pavement (P) and adapted to determine the advancement speed of the scarification and recycling assembly (1) .

16. A scarification and recycling assembly (1) according to claim 13, wherein the speed detecting device (60) comprises a satellite transceiver adapted to transmit itsposition to a global positioning satellite system and wherein the speed detecting device (60) is configured to generate the signal representative of the advancement speed of the scarification and recycling assembly (1) from at least two subsequent positions transmitted to the global positioning satellite system.

17. An operating machine (2) comprising a scarification and recycling assembly (1) according to any one of claims 9 to 16, and preferably further comprising at least one fluidic power take-off (41), or a mechanical or electrical power take-off (42) , to power the drive means (102, 202) and / or said interception device (30) .

18. An operating machine according to claim 17, wherein the electronic control unit (17) of the control system (13) of the scarification and recycling assembly (1) is further configured to communicate, by means of a wired connection or by means of a wireless connection, with a control microprocessor of the operating machine (2) so that the control microprocessor may control at least one control parameter of the operating machine (2), for example the advancement speed of the operating machine (2) , or the power transmitted by means of the fluidic power take-off (41), or by means of the mechanical or electrical power take-off (42), or may control at least one brake of the operating machine (2), as a function ofat least one signal received by the electronic control unit ( 17 ) and representative of a non-optimal operating condition of the scarification and recycling assembly ( 1 ) , for example a condition in which the regenerating fluid is not sufficient, or a fault condition .

19. A method for restoring a road surface comprising the steps of : a) providing at least one scarification and recycling assembly ( 1 ) according to any one of claims 9 to 16; b) possibly, providing an operating machine ( 2 ) , according to claim 17 or 18 , on which said scarification and recycling assembly ( 1 ) is mounted; c) moving the scarification and recycling assembly ( 1 ) onto the deteriorated road surface so as to obtain a milled conglomerate (C) ; d) preferably simultaneously to step c) , injecting regenerating fluid, and possibly water, onto the milled conglomerate being processed by the scarification and recycling assembly ( 1 ) , by controlling the dosing unit ( 15 ) so as to adjust the amount of regenerating fluid to be dispensed as a function of the advancement speed of the scarification and recycling assembly ( 1 ) and as a function of data relating to the physical features of the regenerating fluid to be dispensed; e ) allowing the regenerated conglomerate material (CR) toescape, downstream of the recycling unit (20 ) ; f ) possibly, smoothing and compacting the regenerated milled conglomerate (CR) ; and g) possibly, arranging a binder (L) , for example cement, on the regenerated conglomerate material (CR) .

20. A method for restoring a road surface according to claim 19, wherein in step d) , the injection of regenerating fluid further comprises :- detecting the scarification depth (D ’ ) of the road pavement with respect to the plane of the road pavement (P ) ;- further controlling the dosing unit ( 15 ) so as to adjust the amount of regenerating fluid to be dispensed as a function of the scarification depth (D ’ ) detected .

21. A method for restoring a road surface according to claim 19 or according to claim 20 , further comprising the steps of : w) detecting the advancement speed of the scarification and recycling assembly ( 1 ) along the advancement path on the working surface ( S) of the road pavement (P ) ; x) comparing the detected advancement speed with a desired minimum value and / or a desired maximum value ; y) as a function of the outcome of step x) , controlling the advancement speed so as to bring it above the desired minimum value and / or below the desired maximum value ; andz) possibly, controlling the drive means (102, 202) as a function of the advancement speed detected.

22. A method for restoring a road surface according to claim 21, comprising:- providing an operating machine (2) according to claim 17 or 18 on which said scarification and recycling assembly (1) is mounted, and having driving wheels (3) or movement tracks (4) for moving the operating machine (2) onto the working surface (S) , and an engine adapted to provide power to the driving wheels (3) or the movement tracks (4), wherein step y) is carried out by controlling, by means of the electronic control unit (17), the engine of the operating machine (2) .

23. A method for restoring a road surface according to any one of claims 19 to 22, wherein in step d) , the injection of regenerating fluid further comprises:- by means of a flow rate measuring device, measuring, instant by instant, a flow rate of regenerating fluid actually dispensed by the regenerating fluid dispensing device (40) of the scarification and recycling assembly (1) ; and- further controlling the dosing unit (15) so as to adjust the amount of regenerating fluid to be dispensed at a given instant as a function of the flow rate of regenerating fluid actually dispensed measured by the flowrate measuring device in the immediately previous instant .

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