FR3056515A1 - DEVICE FOR CLEANING AN OUTER SURFACE OF A SENSOR OF A MOTOR VEHICLE - Google Patents

Abstract

A device for cleaning an outer surface of a sensor to be cleaned of a motor vehicle comprises at least a first channel (22) for conveying a first fluid and at least a second channel (24) for conveying a a second fluid. The device further comprises a dispensing nozzle (30) in which is arranged at least one fluid distribution port (36, 38) and which is common to the first channel (22) and the second channel (24).

Description

® FRENCH REPUBLIC

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY © Publication number: 3,056,515 (to be used only for reproduction orders) (© National registration number: 16 59154

COURBEVOIE © IntCI ⁸

B 60 S 1/48 (2017.01), B 60 S 1/56

A1 PATENT APPLICATION

©) Date of filing: 28.09.16. © Applicant (s): VALEO SYSTEMS DESSUYAGE (© Priority: Simplified joint stock company - FR. @ Inventor (s): GRASSO GIUSEPPE, TREBOUET MARCEL, PICOT PHILIPPE, VIEILLE JORDAN, (43) Date of public availability of the KOLANOWSKI GREGORY, BAUDOUIN MAXIME and request: 30.03.18 Bulletin 18/13. PASSERIEUX THIBAUD. ©) List of documents cited in the report preliminary research: Refer to end of present booklet (© References to other national documents ® Holder (s): VALEO WIPING SYSTEMS related: Joint stock company. ©) Extension request (s): © Agent (s): VALEO WIPING SYSTEMS INDUSTRIAL PROPERTY SERVICE.

EXTERIOR OF A VEHICLE SENSOR

DEVICE FOR CLEANING AN AUTOMOTIVE SURFACE.

FR 3 056 515 - A1 (67) A device for cleaning an external surface of a sensor to be cleaned of a motor vehicle comprises at least a first channel (22) for conveying a first fluid and at least one second channel (24) for conveying a second fluid.

The device further comprises a dispensing nozzle (30) in which is arranged at least one fluid dispensing orifice (36, 38) and which is common to the first channel (22) and to the second channel (24).

i

Device for cleaning an external surface of a sensor of a motor vehicle

The field of the present invention is that of cleaning systems for optical sensors for cars.

The most recent motor vehicles are fitted with a driver assistance system which makes it possible to assist the driver or replace him for certain maneuvers. These driver assistance systems are most often triggered by the detection of a signal, whether this signal is optical, electrical or any other type.

It is known practice to clean such sensors using a cleaning product sprayed by a spraying device. The cleaning product dissolves the dirt on the sensor. However, the subsequent drying of the cleaning product leaves a fluid residue which can alter the operation of the sensor and cause an unexpected and dangerous trip of the system with which the sensor is associated.

It is therefore known cleaning devices in which, in addition to a cleaning fluid, sprayed initially on an outer surface of the sensor to clean this outer surface and remove dirt, it is expected to spray on the outer surface of the sensor a drying fluid, for example air. Thus, just after a cleaning cycle by spraying liquid, of a determined duration in particular depending on the size of the sensor, air is transported to the dispensing nozzle disposed at the end of the cleaning device and then projected via this nozzle on the surface to be cleaned / dried. This succession of operations enables efficient cleaning of the optical sensor.

A simple solution to implement is to provide two separate devices for the cleaning liquid and for the drying fluid, and to pilot one after the other. It is understood, however, that such an implementation is bulky and expensive to implement and that one can seek a more compact solution. Consequently, the implementation of such a succession of operations in a single device implies a difficult control for the transport of each of the fluids towards the dispensing nozzle, insofar as it is appropriate that, when the air is transported to the dispensing nozzle, the routing channel through which the air passes does not contain or no more cleaning liquid under penalty of projecting humid air whose performance for drying the optical sensor would be less.

The object of the present invention is therefore to provide a cleaning device limiting or eliminating the fluid residue after spraying onto the external surface of the sensor to be cleaned, in a context of miniaturization of the device.

In the context of the present invention, the external surface of a sensor means a sensor surface subjected to dirt coming from the environment, in particular in the context of a distance detection of a vehicle or an object in the vicinity of the vehicle equipped with the cleaning device according to the invention.

The invention relates in particular to the cleaning of an external surface of an optical sensor.

The subject of the invention is, according to one aspect, a device for cleaning an external surface of a sensor for a motor vehicle, characterized in that it comprises at least one first channel for conveying a first fluid and at least a second channel for conveying a second fluid, as well as a dispensing nozzle in which is arranged at least one fluid dispensing orifice and which is common to the first channel and to the second channel.

The first fluid conveyed through the first channel and the second fluid conveyed through the second channel are two different fluids, and for example a liquid used for cleaning the external surface of the sensor and air for the drying of this surface after cleaning.

This outer surface is for example an optical surface. By optical surface is understood a surface transparent to electromagnetic rays emitted by an optical sensor.

The cleaning device advantageously includes any one of the following characteristics, taken alone or in combination:

the first channel and the second channel are arranged on a telescopic device, movable between a first so-called rest position in which the cleaning device does not distribute any fluid and a second position,

- the dispensing nozzle is arranged at a free end of the telescopic device,

- the first channel and the second channel extend parallel to each other,

- the dispensing nozzle comprises at least a first conduit arranged in the continuity of the first channel for the projection of the first fluid, and at least a second conduit arranged in the continuity of the second channel for the projection of the second fluid,

- the dispensing nozzle comprises a fluid deflection member disposed opposite the at least one fluid dispensing orifice,

- the fluid deflection member comprises at least one inclined plane opposite the at least one fluid distribution orifice,

- At least one inclined plane forms an angle between 20 ° and 8o °, for example between 25 ° and 6o °, in particular between 30 ° and 6o °, in particular between 40 ° and 50 ° with the main axis of elongation the first or second conduit opposite which the fluid deflection member extends, the angle is for example equal to or substantially equal to 45 °,

- the dispensing nozzle has two dispensing orifices respectively associated with the dispensing of the first and second fluid,

the first conduit has at the end opposite the first channel a first distribution orifice and the second conduit has at the end opposite the second channel a second orifice for distribution,

- the fluid deflection member is common to the two distribution orifices,

the inclined plane of the fluid deflection member has two different inclination portions respectively opposite each of the distribution orifices, said portions of the inclined plane having a common edge and a slope antagonistic to that of the other portion,

- the fluid deflection member has a groove in the extension of the at least one dispensing orifice,

- the first conduit and the second conduit, and where appropriate the slopes of the portions of the fluid deflection member, are arranged so that the directions of distribution of the first and second fluids are convergent,

the internal section of at least one conduit formed in the dispensing endpiece is variable along said conduit, in particular by decreasing from a proximal end in the vicinity of the corresponding channel towards an opposite distal end of said conduit: in other words, the proximal end of a conduit is the end of the conduit where the junction takes place between the conduit and the corresponding channel, the distal end being the opposite end to the proximal end, that is to say the one where the conduit opens into a distribution orifice,

the fluid distribution orifices have, for example, a rectangular, square, round, oval or half-moon shape. Other forms can nevertheless be envisaged without departing from the invention.

The invention also relates to a detection assembly for a motor vehicle comprising on the one hand an optical sensor and on the other hand a cleaning device according to the aspect previously described. In particular, the dispensing tip can be movable in a direction perpendicular to the surface of the optical sensor of the detection assembly.

Other characteristics, details and advantages of the invention will emerge more clearly on reading the description given below by way of indication in relation to the drawings in which:

FIG. i is a front view of a vehicle in the front face of which a cleaning device according to the invention is installed,

FIG. 2 is an overall perspective view of a detection assembly according to an embodiment of the invention, a figure in which the support of this detection assembly has been made visible for its attachment to the vehicle, a sensor and its external surface to be cleaned, as well as a cleaning device arranged in the vicinity of the sensor and arranged here in a cleaning position, with a dispensing nozzle disposed at a distance from the support,

FIG. 3 is a view in axial section of the cleaning device according to an embodiment of the invention, with the dispensing nozzle arranged at the end of a telescopic device,

- Figure 4 is a partial perspective view of the telescopic device and the dispensing nozzle of Figure 3, in the position illustrated in Figure 2. Figure 5 is a partial perspective view of the dispensing nozzle Figure 4,

- And Figure 6 is a perspective view of the free end of the dispensing nozzle of Figures 4 and 5, in which there has been made more particularly visible a fluid deflection member facing distribution orifices arranged in end of the distribution channels, the covering element being shown here.

It should first of all be noted that the figures show the invention in detail in order to implement the invention, said figures can of course be used to better define the invention if necessary.

In the following description, the upstream and downstream names refer to the orientation of the cleaning device and to the direction of flow of the fluids from the corresponding storage tank towards the appropriate distribution orifice for its projection towards the external surface. a sensor. The upstream corresponds to the inlet side of the fluids, coming from an external reservoir, in the routing body while the downstream corresponds to the outlet side of the fluids towards the optical surface.

A vehicle 54 as illustrated in FIG. 1 comprises a detection assembly 50 according to the invention. The detection assembly 50 comprises at least one sensor (2), in the example an optical sensor, which can in particular be part of a driving assistance system, and a cleaning device 1 disposed in the vicinity of this sensor . The detection assembly 50 is here arranged on the front face of the vehicle 54, in particular at the level of the grille.

FIG. 2 illustrates an example of a detection assembly 50 according to the invention. The detection assembly 50 comprises a sensor (2), in particular an optical sensor and the cleaning device 1 respectively housed in a support element 52 intended to be fixed to a structural element of the vehicle 54 such as the radiator grille.

An embodiment of a cleaning device 1 according to the invention will now be described in more detail, with particular reference to Figures 3 to 6.

The cleaning device 1 comprises a routing body inside which are arranged a first channel 22 and a second channel 24, and at the end of which is disposed a dispensing nozzle 30 comprising a first conduit 32, a second conduit 34, a first distribution orifice 36 and a second distribution orifice 38, and a fluid deflection member 40.

In the example illustrated, the conveying body comprises a telescopic device 20 configured to be movable in a direction corresponding to the elongation axis of the conveying body of the cleaning device, this direction being in particular perpendicular to the external surface a sensor of the optical sensor 2 of the detection assembly. More particularly, the telescopic device carries at its free end, that is to say the end capable of extending out of the conveying body, the dispensing nozzle and it is able to move from one position rest, in which the dispensing nozzle 30 is disposed substantially in the plane of the support element 52 in a deployed position, visible in FIG. 2 or in FIG. 4, in which cleaning and / or drying fluid can be projected onto the outside surface of the sensor.

The telescopic device 20 comprises in particular a cylinder 10 closed at one end by a base 14 and open at the opposite end so as to form a sleeve 11 for guiding a piston 12 whose movement is controlled by the pressure exerted by the fluid cleaning agent passing through the cylinder towards the dispensing nozzle 30.

On an external face 14a, the base 14 comprises a first intake manifold 16 and a second intake manifold 18, the first intake manifold 16 being intended for the first fluid and the second intake manifold 18 being intended for the second fluid.

On an internal face 14b, the base 14 is provided with two rods 58, 60, respectively integrally formed with the base. Each of the rods has a cylindrical shape of circular section which extends the base inside the conveying body, and these rods have longitudinal dimensions, that is to say along the elongation axis of the conveying body , substantially equivalent.

A first rod 58 is offset from the first intake manifold 16 while the second rod 60 extends in the extension of the second intake manifold 18. This second rod 60 is pierced over its entire length with a conveying conduit 61, and the second rod is disposed in the conveying body so that this conveying conduit 61 extends in the extension of the conduit formed within the second intake manifold 18.

The telescopic device 20 comprises the first channel 22 for the transport of a first fluid and the second channel 24 for the transport of a second fluid, the first channel 22 and the second channel being disposed in the piston 12. The first channel 22 is parallel to the second channel 24. Each channel has the shape of a circular cylinder.

From the upstream end of the piston 12 to its downstream end, the first channel 22 and the second channel 24 respectively have at least one upstream portion 22a, 24a of a first diameter, and a downstream portion 22b, 24b whose diameter is smaller to that of the upstream portion. An intermediate portion, forming a ramp, can be arranged between the upstream portion and the downstream portion to facilitate the routing of the corresponding fluid through the conduit at the throttling zone formed by the difference in diameters of a portion at l 'other.

The diameters of the upstream portion 22a, 24a of the first and second channels 22, 24 are very slightly greater than the outside diameters of the first 58 and second 60 corresponding rods. More specifically, the inside diameter of an upstream portion of a channel 22, 24, the outside diameter of the corresponding guide rod 58, 60, and the dimensions of O-rings 26, 27 arranged in the vicinity of the downstream end of each of these rods to limit or prevent the unexpected passage of fluid in the first channel 22 or in the second channel 24, are defined so that the upstream portions of the channels can slide in leaktight manner around the rods 58, 60.

One or more longitudinal extension grooves 23 are provided between the wall delimiting the upstream portion of the first channel 22 and on the other hand the guide rod 58, so that cleaning fluid can circulate freely, via these grooves when the telescopic device is sufficiently deployed, beyond the joint 27.

The piston 12 comprises, in the vicinity of its upstream end, a ring 29 projecting from the periphery of the piston. This ring 29 has an outside diameter slightly smaller than the inside diameter of the routing body, or cylinder. A peripheral groove is arranged in the outer wall of the ring 29, to receive a lip seal 28 and, as illustrated in FIG. 3, the outside diameter of the ring 29 of the telescopic device and the seal 28 are defined so that the telescopic device, fitted with its seal, can slide in leaktight manner within the hollow body.

This defines a fluid intake chamber 56 into which the cleaning fluid opens after it has passed through the first intake manifold 16. The intake chamber 56 is defined laterally by the internal face of the peripheral wall of the hollow body, and longitudinally by the internal face 14b of the base 14 on the one hand and by the crown 29 on the other hand. It is understood that the longitudinal movement of the piston 12, as will be explained below, generates a modification of the dimension of this fluid intake chamber.

The first intake manifold 16 therefore opens at the periphery of the two rods 58, 60, into the intake chamber 56, and the second intake manifold 18 communicates directly with the second conduit 34. The second manifold thus puts the second conduit 34 with a reservoir of the second fluid (not shown).

The telescopic device 20 comprises a return spring 64. This return spring 64 has a helical shape. The return spring 64 is disposed between the body of the cylinder, defining the envelope of the conveying body, and the piston 12. A first part of the return spring 64 bears in the vicinity of the sleeve on the internal face of the end. and a second part opposite the first part bears on the crown 29 of the piston 12.

The arrangement of the components which has just been given by way of nonlimiting example makes it possible to control the distribution of two distinct fluids and in particular of a cleaning fluid and a drying fluid.

When it is desired to project the cleaning liquid into a first cleaning step, the intake chamber 56 is supplied with cleaning fluid, or first fluid, via the first intake manifold 16. The fluid present in the chamber pushes on the piston 12 by pressure on the crown 29. When the pressure exerted by the first fluid is greater than the return force of the spring 64, the piston slides towards ίο the downstream end of the cleaning device, the piston exiting the cylinder towards its deployed working position. The piston slides along the first and second rod. The first fluid present in the intake chamber is blocked at the O-rings 26,27 and cannot circulate between a rod 58, 60 and the upstream portion of the first channel 22 or the corresponding second channel 24. Beyond a defined position, the first fluid can pass beyond the O-ring 27 disposed at the periphery of the rod 58 housed in the first channel 22, by circulating in the grooves 23. The fact that grooves are only practiced at the level of the first channel 22 makes it possible to control the expansion of the first fluid only in the first channel.

It is understood that the first fluid, namely the cleaning fluid, can be delivered at the downstream end of the telescopic device only through the first channel 22, and only when the telescopic device extends beyond a determined longitudinal position. In this, the first fluid also serves as a means of deploying the telescopic device. On the other hand, it is possible to route the second fluid, namely the drying fluid, into the second channel, regardless of the position of the movable piston relative to the routing body. The drying fluid, in particular air, is blown through the second intake manifold, and passes through the second rod 60 and then through the second channel 24.

Once the jet of the first fluid is finished, a first solenoid valve (not shown) blocks the routing of the first fluid in the intake chamber 56. The telescopic device 20 remains in its second position. A second solenoid valve (not shown) then lets the second fluid, in this example air, pass from the reservoir of the second fluid to the second channel 24 passing through the second intake manifold 18. The second fluid then passes through the second conduit 34 to be expelled by the second distribution orifice 38 to the second conduit 34. The second fluid is then directed to the optical sensor 2 by the second tilting portion 44 of the fluid deflection member 40.

When the second fluid has been expelled, the first solenoid valve allows the first fluid to flow back to the first reservoir. The inlet chamber 56 then empties of the first fluid. The return spring 64 returns to its initial shape, driving the piston 12 in its movement. The cleaning device 1 returns to its first position, called the rest position. The second solenoid valve blocks the passage of the second fluid to the outside of the cleaning device 1.

As illustrated, the routing body has two specific channels configured to distinctly convey two different fluids. We will now describe the dispensing tip 30 arranged at the downstream end of the telescopic device, and therefore through which are likely to pass each of the two fluids distinctly pushed towards this dispensing tip for their projection towards the external surface of the sensor. to clean.

The dispensing tip 30 is disposed at the downstream end of the telescopic device 20. The dispensing tip 30 is arranged perpendicular to the telescopic device 20, that is to say that the general plane of the dispensing tip 30 is perpendicular to the direction of elongation of the telescopic device 20. In the example illustrated, the dispensing nozzle 30 has a base 31 and a covering element 33. It has for example the general shape of a thin plate . In FIGS. 4 and 5 the covering element 33 of the dispensing end piece is removed to make visible the dispensing channels which are arranged in particular in the base 31.

The dispensing nozzle 30 comprises a first conduit 32 and a second conduit 34, arranged between the base and the covering element. The first and second conduits 32 and 34 can be, as illustrated, produced at least in part in the base 31 in particular produced at least in part also in the covering element. In variants not illustrated, the conduits are made entirely in the base, respectively the covering element.

These first conduit and second conduit are notably arranged distinctly, that is to say that these conduits do not communicate from their upstream end, each corresponding with the downstream end of a channel formed in the telescopic device, up to at their downstream end corresponding to a dispensing orifice.

More particularly, the first conduit 32 is arranged in the continuity of the first channel 22, that is to say that the first channel 22 opens directly into the first conduit 32. And the first conduit 32 comprises a first distribution orifice 36, disposed at the distal axial end of the first conduit 32 opposite the proximal axial end forming a junction of the first conduit 32 with the first channel 22. Together, the first conduit 32 and the first channel 22 form a first continuous artery between the chamber d inlet 56 and the exterior of the cleaning device 1.

Similarly, the second conduit 34 is arranged in the continuity of the second channel 24, that is to say that the second channel 24 opens directly into the second conduit 34. And the second conduit 34 comprises a second distribution orifice 38 , disposed at the distal axial end of the second conduit 34 opposite the proximal axial end forming a junction of the second conduit 34 with the second channel 24. Together, the second channel 24 and the second conduit 34 form a second continuous artery between the second intake manifold 18 and the exterior of the cleaning device 1.

In the example illustrated, each of the first 32 and second 34 conduits is formed by a groove arranged in the base 31 of the dispensing nozzle 30, and covered by the covering element 33. It will be understood that provision can be made it does not matter whether the covering element is planar or whether it is, in a complementary manner to the groove formed in the base 31, hollowed out to form a dimension of conduit sought for a particular application.

The axis of the first conduit 32 and the axis of the second conduit 34 are intersecting, that is to say that the first conduit 32 and the second conduit 34 are not parallel. In this, it can be observed that, in the illustrated mode, the conduits are arranged in the direction of approximation towards one another at the level of the projection orifices formed at the distal end of the conduits. The junction between the first conduit 32 and the first channel 22 and the junction between the second conduit 34 and the second channel 24 are more spaced than are the distribution orifice formed at the distal end of the first conduit and the orifice distribution formed at the distal end of the second conduit.

For example, the section of at least one of the conduits is scalable in that it decreases as the distribution orifice is brought closer. The section of a conduit 32, 34 is greater at the proximal end of this conduit, on the side of the junction between the channel 22, 24 and the corresponding conduit 32, 34, than at the distal end, on the side distribution orifices 36, 38. The evolution of the dimension of the section can be continuous and regular from one end to the other, such as the first conduit 32 is illustrated in FIG. 5, and this evolution can be done by bearing (s), such as the second conduit 34 is illustrated in this same figure 5. In one case as in the other, it is thus possible to increase the speed of exit of the corresponding fluid, the reduction in section as and as the dispensing orifice approaches, for a constant flow, increase the speed of the fluid.

Taken in a section perpendicular to the general direction of extension of each conduit, the section of each conduit can be of any shape between the distal end and the proximal end of the conduit, but it is advantageous that, the orifices of distribution 36, 38 have an essentially rectangular shape as illustrated in FIG. 6, or a square, round, oval or half-moon shape. It is thus easier to control the projection area of the fluid on the surface of the sensor. More particularly, the dispensing orifices 36, 38 may have the shape of a rectangle whose angles are rounded.

Furthermore, it should be noted that the conduits 32 and 34 and the corresponding dispensing orifices 36, 38 extend side by side, in particular substantially centered on the same plane parallel to the plane defining the base 31 of the dispensing nozzle. . The conduits are arranged at the same level and can be closed by a substantially planar covering element 33.

The cleaning device 1 also comprises a fluid deflection member 40. This fluid deflection member 40 is arranged at the end of the dispensing nozzle 30 opposite the end for connection to the telescopic device 20. The member for deflecting the fluids 40 is arranged opposite the dispensing orifices 36, 38. In the illustrated case where the dispensing end piece 30 is made in two parts including a base 31 and a covering element 33, the deflecting member fluids 40 is advantageously produced projecting from the base 31, being made from material of this base 31.

The fluid deflection member 40 advantageously comprises an inclined plane 42 opposite the distribution orifices 36, 38.

The fluid deflection member 40 is for example in the form of a triangular prism, with a first face 41 which extends substantially perpendicular to the plane of the base 31, in particular in the extension of the distal end edge of this base, and with a second face 42 which takes the form of the inclined plane 42 connecting the immediate proximity of the dispensing orifices 36, 38 to the free end of the first face 41. This inclined plane 42 thus extends opposite the distribution orifices and forms an obstacle to the exit of fluids from these orifices. It is understood that the shape of the inclined plane generates a deviation of these fluids and not a blockage.

In the embodiment illustrated in the figures, the fluid deflection member 40 comprises an inclined plane 42 arranged so as to have a first inclination portion 43 and a second inclination portion 44. The two inclination portions 43, 44 have a common edge 47 and have, for example, slopes of antagonistic inclinations from this common edge. Each inclination portion thus has a double slope, namely a first slope defined axially and rising from the dispensing orifice , and a second slope defined laterally, in particular on either side of the common edge. The inclinations of the first slopes of each inclination portion define for example an angle eu, respectively a ₂ .

The first slope makes it possible to define the angle of impact of the fluid on the external surface of a sensor to be cleaned, it being understood that one seeks for example an angle of impact on the external surface of the sensor substantially equal to 45 ° .

To this end, it has been determined that the inclined plane 42 should have a first slope with an angle a of inclination which is equal to or substantially equal to 45 °, for example equal to 42.5 °. More generally, depending on the impact angle defined for a particular sensor, the inclined plane 42, respectively the first and / or second portions, have a first slope with an angle a, respectively ce, or a ₂ of inclination between 20 ° and 8o °, especially between 30 ° and 6o °, in particular between 40 ° and 50 °. The angles angles aa, respectively ce, or a _{2 which} can be measured between the inclined plane and the main axis of elongation of the first or second duct opposite which the fluid deflection member extends.

The second slope of each of the tilting portions of the fluid deflection member is notably defined in relation to the orientation of the first conduit and the second conduit so that the directions of distribution of the fluids are convergent. FIG. 6 illustrates in particular a line representative of the direction of distribution of the cleaning fluid 72 and a line representative of the direction of distribution of the drying fluid 74 in order to highlight the approximation of these directions of distribution at the outlet of the device. . The second slope will thus be defined so that these directions of distribution converge on the optical surface.

According to a first variant of the invention, the tilting portions 43, 44 are planar. In a second variant of the invention, the second inclination portion 44 disposed opposite the second distribution orifice 38 comprises a groove 46. This groove 46 is arranged in the continuity of the second conduit 34 and the second distribution orifice 38. In accordance with what was previously described, this second inclination portion faces the duct through which the air is distributed for drying the optical surface, that is to say the second fluid. The fact of digging the inclined plane makes it possible to orient the air jet so that it diffuses later and increases the drying performance. In order to allow the projection of air at the outlet from the fluid deflection member, the groove 46 extends over the whole of the first inclination portion 43 of the fluid deflection member 40.

Thus arranged, the cleaning device 1 makes it possible to carry out cleaning and drying of the external surface of the sensor of the detection assembly 50.

The foregoing description clearly explains how the invention makes it possible to achieve the objectives which it has set for itself, and in particular to propose a cleaning device 1 which makes it possible to limit or remove the fluid residue on an external surface of a sensor. after cleaning it, which is a guarantee of safety for the driver like other road users.

Of course, various modifications can be made by a person skilled in the art to the cleaning device which has just been described by way of nonlimiting example, as soon as at least one first channel is used for the routing. of a first fluid and at least a second channel for the delivery of a second fluid, as well as a dispensing nozzle in which is arranged at least one fluid dispensing orifice and which is common to the two channels.

In any event, the invention cannot be limited to the embodiment specifically described in this document, and extends in particular to all equivalent means and to any technically effective combination of these means.

Claims (13)

1. Cleaning device (i) of an external surface of a sensor for a motor vehicle, characterized in that the cleaning device (i) comprises at least a first channel (22) for conveying a first fluid and at least a second channel (24) for conveying a second fluid, as well as a dispensing nozzle (30) in which is arranged at least one fluid dispensing orifice (36, 38) and which is common to the first channel (22) and the second channel (24). 2. Cleaning device (1) according to the preceding claim, characterized in that the first and second channels (22, 24) are arranged on a telescopic device (20), movable between a first position in which the cleaning device does not distribute no fluid and a second position. 3. Cleaning device (1) according to one of the preceding claims, characterized in that the dispensing nozzle (30) comprises at least a first conduit (32) arranged in the continuity of the first channel (22) for projection of the first fluid, and at least one second conduit (34) arranged in the continuity of the second channel (22) for the projection of the second fluid. 4. Cleaning device (1) according to one of the preceding claims, characterized in that the dispensing nozzle (30) comprises a fluid deflection member (40) disposed opposite the at least one fluid dispensing orifice (36, 38). 5. Cleaning device (1) according to the preceding claim, characterized in that the fluid deflection member (40) comprises an inclined plane (42) or at least a first or second inclination portion (43 44) in look of the at least one fluid distribution orifice (36, 38) forming an angle (a, eu, a ₂ ) with the main elongation axis of the first or second conduit (32, 34) opposite which the member fluid deflection (40) extends. 6. Cleaning device (1) according to the preceding claim, characterized in that 1 ’angle (a, eu, eu) is between 25 ° and 6o °. 7. Cleaning device (1) according to one of the preceding claims, characterized in that the dispensing nozzle (30) has two dispensing orifices (36, 38) respectively associated with the dispensing of the first and second fluid. 8. Cleaning device (1) according to one of claims 4 to 7, characterized in that the fluid deflection member (40) has a groove (46) in the extension of the at least one dispensing orifice (36 , 38). 9. Cleaning device (1) according to any one of the preceding claims and in combination with claim 3, characterized in that the first conduit (32) and the second conduit (34) on the one hand, and if necessary the slopes of the portions of the fluid deflection member (40) are arranged so that the directions (72, 74) of fluid distribution are convergent. 10. Cleaning device (1) according to any one of the preceding claims, in combination with claim 3, characterized in that the internal section of at least one conduit (32, 34) formed in the dispensing nozzle ( 30) is variable along said conduit, in particular by decreasing from the proximal end in the vicinity of the corresponding channel towards the opposite distal end of said conduit (32, 34). 11. Cleaning device (i) according to any one of the preceding claims, in combination with claim 4, characterized in that the dispensing orifices (36, 38) of the fluids have a shape 5 rectangular. 12. Detection assembly (50) for a motor vehicle comprising on the one hand a sensor (2) and on the other hand a cleaning device (1) according to any one of the preceding claims arranged for 10 clean an external surface of the sensor (2). 13. Detection assembly (50) according to the preceding claim, characterized in that the dispensing end piece (30) is movable in a direction perpendicular to the exterior surface of the sensor (2).