FR3090539A1 - System for wiping a rear window having a spraying device - Google Patents

Abstract

The present invention relates to a wiping system (1) of a rear window (3) having at least one optical sensor (5) comprising an optic (51), said wiping system (1) having: - a spray device (7 ') configured to spray at least part of the rear window (3) with a cleaning liquid (8), - at least one wiper blade (9) intended to be placed in contact with the rear window (3), said wiper blade (9) being configured to be moved between a first and a second position, the spray device (7 ') is movable between a rest position and an extreme spray position , and the movement of the spray device (7 ') has at least one specific position for spraying the optics (51) of the optical sensor (5), into which the cleaning liquid (8) is intended to be sprayed towards the optics (51) of the optical sensor (5). Abstract figure: Figure 4

Description

Description

Title of the invention: System for wiping a rear window having a spraying device

The present invention relates to the field of wiping systems for the windows of a motor vehicle, such as the windshield or the rear window. More particularly, the present invention relates to the field of wiping systems for rear windows of motor vehicles.

Nowadays, a large number of optical sensors are fitted to motor vehicles in order to form driving assistance systems. Such optical sensors can for example be arranged near the rear window of this motor vehicle. Indeed, such an arrangement of these optical sensors can allow their use to take road scenes behind the vehicle for example in the context of parking assistance devices, or for monitoring traffic at the rear of the motor vehicle in the case of autonomous vehicles. However, in such an arrangement, the optical sensors are highly subjected to soiling, such as dust or splashing of mud, and to climatic vagaries, which can affect their good operability.

In recent years, many devices for cleaning such optical sensors have been developed to allow good operability of the latter. However, these different cleaning devices known from the prior art, when they use cleaning liquid, have their own nozzles for spraying cleaning liquid. Thus, these cleaning devices require either to provide an access hatch in order to be able to fill the cleaning liquid intended to be used for cleaning the optical sensor when this cleaning device has a clean reservoir or else a tedious and expensive installation because it it is necessary to connect this cleaning device to the general tank of cleaning liquid of the motor vehicle in order to guarantee the supply of this cleaning device with cleaning liquid.

On the other hand, the optical sensor cleaning devices known from the prior art are additional elements added to the motor vehicle, which increases the cost of this motor vehicle.

[0005] Document US 2009/0250533 discloses a spraying device having an orienting element configured to direct a cleaning liquid either towards the external surface of a window or towards the optics of a camera. . This document specifies that the change of position of the orienting element is carried out by modification of the pressure of the cleaning liquid in this spraying device and that this modification of pressure is controlled by a user of the motor vehicle. However, such an orienting element can be caused to lock and can no longer pivot or even be subject to breakage or even to deformation under the effect of the stresses undergone. Thus, such a spray device can have a limited lifespan. In addition, this change in pressure leads to an increase in the consumption of cleaning liquid and therefore in the costs of cleaning this window and the field of vision of this optical sensor.

The present invention aims to overcome or less partially the defects of the prior art set out above by proposing a wiping system for cleaning a rear window and at least one optical sensor requiring lower amounts of cleaning liquid than those known from the prior art.

Another objective of the present invention, different from the previous objective, is to provide a wiping system allowing cleaning of an external surface of a window and of an optic of an optical sensor.

Another objective of the present invention, different from the previous objectives, is to provide a wiping system whose efficiency and lifespan are improved.

In order to achieve at least partially at least one of the aforementioned objectives, the present invention relates to a system for wiping a rear window of a motor vehicle having at least one optical sensor comprising an optical system, said system wiping with:

- a spray device configured to spray at least part of an external surface of the rear window with a cleaning liquid,

- At least one wiper blade intended to be disposed in contact with the external surface of the rear window, said wiper blade being configured to be moved on this external surface between a first and a second position in order to wipe at least partially this external surface, and

a wiper blade drive motor configured to allow the wiper blade to move between its first and second position, the spray device being movable between a rest position and an extreme spray position, and the movement of the spray device having at least one specific position for spraying the optics of the optical sensor, in which the cleaning liquid is intended to be sprayed towards the optics of the optical sensor.

Such movement of the spray device allows the use of this spray device fitted to the motor vehicle for cleaning the rear window in order to spray cleaning liquid towards the optics of the optical sensor in order to clean the field of vision of this optical sensor. Thus, it is possible to use a single spray device to allow both the cleaning of the rear window and that of the optics of the optical sensor. Furthermore, such a spraying device makes it possible to reduce the costs associated with the presence of the optical sensor because this optical sensor no longer requires a clean cleaning device to guarantee its state of cleanliness and therefore its proper functioning.

The wiping system according to the present invention may further comprise one or more of the following characteristics taken alone or in combination.

The wiping system may further comprise an electronic control unit configured to control the movement of the wiper blade between its first and second positions and to control the projection of cleaning liquid as a function of the position of the brush d 'wiping.

According to a particular embodiment, the spray device can be adapted to be mounted on a body element of the motor vehicle.

According to this particular embodiment, the spraying device may include an angled projection element having an inlet for the cleaning liquid and a projection nozzle oriented at least partially towards the external surface of the glass rear and configured to allow the projection of cleaning liquid, said spray nozzle being movable between the rest position and the extreme spraying position passing through the specific spraying position of the optics of the optical sensor under the effect an actuator.

In one aspect, the projection nozzle can be moved in translation between the rest position and the extreme spray position by passing through the specific spray position of the optics of the optical sensor.

According to another aspect, the projection element can have a pivot connection disposed at a bend present between the inlet and the projection nozzle, and the movement of the projection nozzle can comprise a first step of translational displacement of the projection nozzle between its rest position and its specific spraying position and a second step of pivoting displacement of the projection nozzle between its specific spraying position of the optics of the optical sensor and its position spraying extremity, said pivoting movement being carried out along an axis perpendicular to a direction of extension of the projection nozzle so as to move the projection nozzle away from the external surface of the rear window.

The rest position and the specific spray position of the spray nozzle can be confused.

According to this particular embodiment, the projection element is configured to spray cleaning liquid towards the optics of the optical sensor when the spray nozzle is in its specific spraying position and to spray liquid cleaning on the external surface of the rear window when the projection nozzle is in its extreme spray position.

According to another particular embodiment, the spray device can be carried by the wiper blade.

In one aspect, the sprinkler device may include a cleaning liquid supply line attached to the wiper blade.

According to this aspect, the wiper blade has first and second longitudinal ends and the cleaning liquid supply line extends between the first and second longitudinal ends of the wiper blade.

According to another aspect, the spraying device can comprise a pipe for supplying cleaning liquid integrated into the wiper blade.

The first longitudinal end of the wiper blade may have a guide arm intended to be fixed to a body element of the motor vehicle and the second longitudinal end may be free, said second longitudinal end being configured to be moved on the external surface of the rear window in a semi-circular movement between the first and second positions of the wiper blade.

According to this other particular embodiment, the electronic control unit can be configured to allow the projection of cleaning liquid by the spraying device when the wiper blade sweeps a predefined spraying area comprising the optical sensor optics.

According to a first variant of this other embodiment, the second free longitudinal end may include the spraying device.

According to one aspect of this first variant, the predefined spraying area can correspond to an angular range less than or equal to 15 ° on either side of the optics of the optical sensor.

According to another aspect of this first variant, the predefined dispersion area of the wiper blade corresponds to the specific position of spraying of the optics of the optical sensor.

According to this other aspect, the electronic control unit can control the stopping of the movement of the wiper blade when the spray device is aligned with the optics of the optical sensor, this position corresponding to the specific position d spraying of the optical sensor optics.

According to a second variant of this other particular embodiment, the optics of the optical sensor can be arranged between the first and second positions of the wiper blade and the wiper blade can have a plurality of openings configured for allow the projection of cleaning liquid on the external surface of the rear window during its movement between its first and second positions.

According to a third variant of this other embodiment, the wiper blade may further comprise a parking position disposed before the first position of movement of the wiper blade and the optics of the optical sensor may be disposed between the parking position and the first position of the wiper blade. Alternatively or additionally, the optics of the optical sensor can be covered by the wiper blade when the wiper blade occupies its parking position.

According to this third variant, the specific spraying position can correspond to the parking position.

According to this third variant, the rest position of the spray device can correspond to the first position of the wiper blade and the extreme spray position can correspond to the second position of the wiper blade.

The optical sensor can be arranged in a body element arranged above the rear window in the mounted state of the rear window on the motor vehicle.

According to a particular embodiment, the guide arm can be fixed to the body element comprising the optical sensor.

Other characteristics and advantages of the present invention will appear more clearly on reading the following description, given by way of illustration and not limitation, and of the appended drawings in which:

[Fig.l] Figure 1 is a schematic side representation of a motor vehicle having a wiping system according to a first particular embodiment; [Fig.2A] Figure 2A is an enlarged side schematic representation of the wiping system of Figure 1 having a spray device in a rest position according to a first variant;

[Fig.2B] Figure 2B is a schematic side representation of the spray device of Figure 2A in a specific position of spraying;

[Fig.2C] Figure 2C is a schematic side representation of the spray device of Figure 2A in an extreme spray position;

[Fig.3A] Figure 3A is an enlarged side schematic representation of the wiping system of Figure 1 having a spray device in a rest position according to a second variant;

[Fig.3B] Figure 3B is a schematic side representation of the spray device of Figure 3A in a specific position of spraying;

[Fig.3C] Figure 3C is a schematic side representation of the spray device of Figure 3A in an extreme spray position;

[Fig.4] Figure 4 is a schematic front view of a wiping system according to a second embodiment;

[Fig.5A] Figure 5A is a schematic front view of a wiping system according to a variant of the second embodiment when a wiper blade is in the parking position; and

[Fig.5B] Figure 5B is a schematic front view of the wiping system of Figure 5A when the wiper blade is located between a first and a second position.

Identical elements in the different figures, have the same references.

The following embodiments are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference relates to the same embodiment, or that the characteristics apply only to a single embodiment. Simple features of different embodiments can also be combined and / or interchanged to provide other embodiments.

In the present description, it is possible to index certain elements or parameters, such as for example first element or second element as well as first parameter and second parameter or even first criterion and second criterion etc. In this case, it is a simple indexing to differentiate and name elements or parameters or criteria similar but not identical. This indexing does not imply a priority of an element, parameter or criterion over another and one can easily interchange such names without departing from the scope of this description. This indexing also does not imply an order in time for example to assess this or that criterion.

Referring to Figures 1 to 5B, there is shown a wiping system 1 of a rear window 3 of a motor vehicle. The rear window 3 has an external surface 3a configured to be placed in contact with the environment outside the motor vehicle. More particularly, dirt such as dust coming from the outside or else mud projection for example can come to deposit on this external surface 3a of the rear window 3. On the other hand, the motor vehicle has at least one sensor optic 5 comprising an optic 51 configured to take road scenes located at the rear of the motor vehicle. This optical sensor 5 can for example be a CCD sensor (for "charged coupled device" in English, namely a charge transfer device) or a CMOS sensor comprising at least one matrix of miniature photodiodes. Furthermore, the optic 51 can for example be a lens. An objective may comprise at least one lens, in particular several lenses depending on the field of vision and the resolution of the optical sensor 5.

Such an optical sensor 5 can for example be a reversing camera generally used for parking assistance or an optical sensor 5 used to detect traffic at the rear of the motor vehicle in the case of autonomous vehicles. More particularly, this optical sensor 5 can be placed behind this rear window 3 or else in a bodywork element 11 disposed near this rear window 3 in the mounted state of this rear window 3 on the motor vehicle, as for example in the bodywork element 11 supporting a third brake light generally disposed at the level of a trunk door of the motor vehicle for example.

The wiping system 1 has a spraying device 7, 7 'and at least one wiping brush 9 disposed in contact with the external surface 3a of the rear window 3. The wiping brush 9 is configured to be moved on this external surface 3a between a first and a second position in order to at least partially wipe this external surface 3a. Furthermore, the wiping system also has a drive motor (not shown) for the wiper blade 9. The drive motor is configured to allow the wiper blade 9 to move between its first and second positions . On the other hand, the spraying device 7, 7 'is configured to spray at least part of the external surface 3a of the rear window 3 with a cleaning liquid 8 (visible in FIGS. 2B, 2C, and 3B at 4). Typically, this spray device 7, 7 'corresponds for example to a nozzle fitted to the motor vehicle. Indeed, such nozzles are present on motor vehicles because it is possible that stubborn or encrusted dirt does not leave by simple sweeping with the wiping brush 9, and the spraying of cleaning liquid 8 makes it possible to moisten these soils in order to facilitate their elimination during the passage of the wiper blade 9.

The spray device 7, 7 ', according to the different embodiments shown with reference to Figures 1 to 5B, is movable between a rest position (visible in Figures 2A and 3A for example) and an extreme position spray (visible in Figures 2C and 3C for example). In addition, the movement of the spraying device 7, 7 'has at least one specific spraying position (visible in FIGS. 2B, 3B and 4 in particular) of the optics 51 of the optical sensor 5. In this specific position d 'spraying, the cleaning liquid 8 is intended to be projected towards the optics of the optical sensor 5. It is thus possible to use the spraying device 7, 7' present on the motor vehicle in order to allow cleaning optics 51 of the optical sensor, and more particularly the field of vision of this optics 51. Indeed, it is fairly conventional to install this optical sensor 5 behind a protective element, such as for example a protective glass, in order to prevent any degradation of this optic 51 due to external aggressions such as humidity or even solid projections. Thus, the spray device 7, 7 'projects cleaning liquid 8 towards this protective element so as to remove any dirt present on the latter. It is thus possible to limit the costs of the motor vehicle because it has a single spraying device both for cleaning the field of vision of the optics 51 of the optical sensor 5 and for the external surface 3a of the rear window. 3. Furthermore, the use of such a spraying device 7, 7 ′ makes it possible to limit the consumption of cleaning liquid 8 during the cleaning of this rear window 3 and of the optics 51 of the optical sensor 5. On the other hand, the use of a single spray device 7, 7 'for cleaning the rear window 3 and the field of vision of the optical sensor 5 makes it possible to simplify the architecture of this spray device 7 , 7 'on the motor vehicle. In particular, the motor vehicle may have a single tank of cleaning liquid, which simplifies the paths of the ducts for supplying cleaning liquid and the supply, more specifically the filling, of cleaning liquid to ensure proper operation. of this spraying device 7, 7 '. On the other hand, the use of a mobile spraying device 7, 7 'makes it possible to differentiate the washing of the field of vision of the optics 51 of the optical sensor 5 from that of the external surface 3a of the rear window 3 , which in particular makes it possible to limit the consumption of cleaning liquid. Indeed, the surface to be cleaned for the field of vision of the optics 51 is much smaller than that of the rear window 3 and it is possible to spray only a few drops of cleaning liquid 8 in order to allow the cleaning of the field of vision. vision of this perspective 51.

On the other hand, the wiping system 1 further comprises an electronic control unit 13 configured to control the movement of the wiping brush 9 between its first and second positions. The electronic control unit 13 is also configured to control the spraying of cleaning liquid 8 as a function of the position of the wiper blade 9.

First embodiment:

Referring to Figures 1 to 3C, there is shown the wiping system 1 according to a first particular embodiment. According to this first particular embodiment, the spray device 7 is adapted to be mounted on a body element 11 of the motor vehicle. In general, such a spray device 7 is arranged in a body element arranged at an upper part of the body so that the cleaning liquid 8 trickles onto the external surface 3a of the window rear 3 when it is projected onto the latter during the operation of the motor vehicle. According to the first particular embodiment described with reference to Figures 1 to 3C, the spray device 7 is housed inside a roof spoiler corresponding to the bodywork element 11. In addition, the optical sensor 5 is also housed in the bodywork element 11 so that the cleaning liquid 8 trickles onto the latter as is explained in more detail later. For example, this optical sensor 5 can be housed in a trunk bar arranged just below the spoiler. According to other variants not shown here, the spray device 7 and the optical sensor 5 can be arranged at other places at the rear of the motor vehicle. For example, the optical sensor 5 can be arranged behind the rear window 3 and the spraying device at the level of a lateral upright of the boot door, this lateral upright constituting in this case the bodywork element 11.

First variant of the first embodiment:

According to a first variant of this first particular embodiment shown with reference to Figures 2A to 2C, the spray device 7 comprises a projection element 71 of angled shape. The projection element 71 has an inlet 73 for the cleaning liquid 8 and a projection nozzle 75 configured to allow the projection of cleaning liquid 8. The inlet 73 and the projection nozzle 75 of the projection element 71 are separated from each other by an elbow 79. The projection nozzle 75 is movable between the rest position (represented with reference to FIG. 2A) and the extreme spray position (represented with reference to FIG. 2C) under the effect of an actuator 76. During its movement between the rest position and the extreme spray position, the projection nozzle 75 passes through the specific position for spraying the optics 51 of the optical sensor 5 (shown with reference to Figure 2B).

On the other hand, the wiping system 1 may include the electronic control unit 13 configured to control the actuator 76. According to a variant not shown here, the actuator 76 can be controlled directly by a user of the motor vehicle, for example using the commodo controlling the spraying of cleaning liquid 8 onto the rear window 3. According to this first variant, the spray nozzle 75 is configured to spray cleaning liquid 8 towards the optics 51 of the optical sensor 5 when it is in its specific spraying position and for spraying cleaning liquid 8 onto the external surface 3a of the rear window 3 when it is in its extreme spraying position.

Referring to Figure 2A, the spray device 7 is housed inside the body member 11 when the spray nozzle 75 occupies its rest position. Such an arrangement of the spraying device 7 can in particular make it possible to prevent possible clogging of the spray nozzle 75 hey when spraying solid dirt, for example. When the spray device 7 is in its rest position, the spraying of cleaning liquid 8 by the spray nozzle 75 is prevented.

Referring to Figure 2B, the spray device 7 is shown when the spray nozzle 75 occupies its specific spray position. When the projection nozzle 75 is in this position, it is directed so as to spray cleaning liquid 8 towards the optics 51 of the optical sensor 5. Furthermore, such an arrangement of the projection device 7 allows the cleaning liquid 8 to run at least partially on the external surface 3a of the rear window 3, which makes it possible to limit the consumption of cleaning liquid 8. In order to pass into this specific spraying position, the projection nozzle 75 is moved in a translational movement. On the other hand, in order to allow the projection of cleaning liquid 8 towards the optics 51 of the optical sensor 5 and also towards the external surface 3a of the rear window 3, the projection nozzle 75 is oriented at least partially towards the external surface 3a of the rear window 3.

Referring to Figure 2C, there is shown the projection nozzle 75 when it occupies its extreme spray position. In the extreme spraying position, the cleaning liquid 8 is sprayed onto the external surface 3a of the rear window 3. In order to allow the projection nozzle 75 to pass from its specific spraying position (shown with reference to the figure) 2B) in its extreme spray position, the projection nozzle 75 is moved in a translational movement in a direction identical to that allowing the passage of the projection nozzle 71 from its rest position to its specific spray position under the effect of the actuator 76. Thus, according to this first variant shown with reference to FIGS. 2A to 2C, the projection nozzle 75 is moved in translation between the rest position and the extreme spray position passing through the position specific spraying of the optics 51 of the optical sensor 5.

According to this first variant, the actuator 76 can accommodate a telescopic channel 78 disposed between the inlet 73 and the elbow 79. This telescopic channel 78 is configured to allow movement of the projection nozzle 75 between its rest position and its extreme position of spraying through its specific position of spraying. According to this first variant, the actuator 76 can move the projection nozzle 75 by lengthening or shortening the telescopic channel 78 by varying the pressure of the cleaning liquid 8 circulating inside the projection element 71 On the other hand, in such a case, the passage of the projection nozzle 75 from its extreme spray position to its rest position can be achieved using elastic return means (not shown), as by example a spring. According to an alternative, the actuator 76 can comprise a motor (not shown), such as for example an electric motor, configured to allow the extension or the shortening of the telescopic channel 78 in order to allow the displacement of the projection nozzle 75.

Second variant of the first embodiment:

Referring to Figures 3A to 3C, there is shown the spray device 7 according to a second variant. According to this second variant, the projection element 71 has, in addition to the other elements described with reference to the first variant, a pivot link 77 disposed at the elbow 79 present between the inlet 73 and the projection nozzle 75.

Referring to Figures 3A and 3B, there is shown the projection nozzle 75 in its rest position (Figure 3A) and in its specific spray position (Figure 3B). The displacement of the projection nozzle 75 between these two positions is identical to that described with reference to the first variant, that is to say according to a translational movement during a first displacement step thanks to the elongation of the telescopic channel 78 under the effect of the actuator 76.

Referring to Figure 3C, there is shown the projection nozzle 75 when it occupies its extreme spray position. According to this second variant, the displacement of the spray nozzle 75 comprises a second displacement step in order to allow its passage from its specific spray position (FIG. 3B) to its extreme spray position. This second displacement step is carried out by a pivoting movement of the spray nozzle 75 between its specific spraying position and its extreme spraying position. This pivoting movement is carried out along an axis perpendicular to a direction of extension of the projection nozzle 75 so as to move the projection nozzle 75 away from the external surface 3a of the rear window 3 when the projection nozzle 75 passes through its extreme spray position. This pivoting movement can for example be caused by a variation in the pressure of circulation of the cleaning liquid 8 in the projection element 71. Alternatively or in addition, this pivoting movement can be allowed by the actuator 76 when the latter is in the form of a motor, such as for example an electric motor. The pivoting of the projection nozzle 75 can be controlled by the electronic control unit 13.

Furthermore, according to an embodiment not shown here of these first and second variants, the rest position and the specific spray position of the spray nozzle 75 can be combined. In such a case, the spray device 7 is able to move only between its specific spray position and its extreme spray position either in translation or in pivoting.

Second embodiment:

Referring to Figures 4 to 5B, there is shown the wiping system 1 according to a second particular embodiment. According to this second particular embodiment, the spraying device 7 ′ is carried by the wiping brush 9. In fact, there are currently wiping brushes 9 configured to spray cleaning liquid 8 onto the window that they sweep during the movement of this wiper blade 9 between its first and its second positions.

On the other hand, and generally, the wiper blade 9 has a first 91 and a second 93 longitudinal ends. The first longitudinal end 91 is conventionally connected to a body element 11 using a guide arm 95 and the second longitudinal end 93 is free. The guide arm 95 is set in motion by the drive motor so as to allow the wiper blade 9 to be displaced between its first and second positions so that the latter sweeps at least partially the external surface 3a of the rear window 3. According to the different variants shown with reference to FIGS. 4 to 5B, the wiper blade 9 is moved on the external surface 3a of the rear window 3 in a semicircular movement, as symbolized by the stroke C of the second free end 93 illustrated in FIGS. 4 to 5B. Thus, during the movement of the wiper blade 9 between its first and second positions, the spraying device 7 ’can spray directly onto the external surface 3a of the rear window 3 of the cleaning liquid 8.

According to a first variant shown with reference to Figure 4, the spray device 7 'comprises a supply line for cleaning liquid fixed to the wiper blade 9. This supply line for cleaning liquid extends between the first 91 and second 93 longitudinal ends of the wiper blade 9 so that the second free longitudinal end 93 of the wiper blade 9 includes the spray device 7 'in order to spray cleaning liquid 8 towards the optics 51 of the optical sensor 5. Furthermore, this spraying device 7 ′ is also configured to spray cleaning liquid 8 onto the external surface 3a of the rear window 3 during the movement of this brush. between its first and second positions.

According to the particular embodiment of Figure 4, the wiping system 1 further comprises the electronic control unit 13. The electronic control unit 13 is configured to allow the projection of cleaning liquid 8 by the spraying device 7 'when the wiper blade 9 scans a predefined spraying area comprising the optics 51 of the optical sensor 5. In order to allow this projection of cleaning liquid, the electronic control unit can, by example, increase the cleaning liquid flow towards the spraying device 7 'so as to increase the outlet pressure of this cleaning liquid 8 at the second free longitudinal end 93. Furthermore, the predefined spraying zone can correspond to an angular range a less than or equal to 15 ° on either side of the optics 51 of the optical sensor 5. Thus, the spraying device 7 ′ can project cleaning liquid 8 towards the optics 51 of the optical sensor 5 during a continuous movement of the wiper blade 9 between its first and second positions and vice versa.

According to a variant not shown here, the predefined dispersion area of the wiper blade 9 may correspond to the specific position of spraying of the optics 51 of the optical sensor 5. According to this variant not shown, the electronic unit of control 13 can control the stopping of the movement of the wiper blade 9 when the spraying device 7 'is aligned with the optics 51 of the optical sensor 5, this position corresponding to the specific spraying position of the optics 51 of the optical sensor 5. Typically, this stop of the movement of the wiper blade 9 is less than 5 seconds, and preferably less than 2 seconds.

Referring to Figures 5A and 5B, there is shown the second embodiment of the wiping system 1 according to another variant. According to this other variant, the spraying device 7 ′ comprises a pipe for supplying cleaning liquid integrated into the wiper blade 9. According to this other variant, the wiper blade 9 has a plurality of openings configured to allow the projection of cleaning liquid 8 onto the external surface 3a of the rear window 3 during its movement between its first and second positions. Thus, according to this other variant, the spraying device 7 ′ and the wiping brush 9 are combined.

According to this other variant, the wiper blade 9 can also take up a parking position as shown with reference to FIG. 5A. This parking position is disposed before the first position of movement of the wiper blade 9. Furthermore, the optics 51 of the optical sensor 5 is arranged between the parking position and the first position of the wiper blade 9 so that the wiper blade 9 scans the field of vision of this optic 51 when it passes into its first position.

According to the particular embodiment of Figure 5A, the optics 51 of the optical sensor 5 is covered by the wiper blade 9 when the wiper blade 9 occupies its parking position. Such an arrangement of the wiper blade 9 can for example make it possible to prevent premature fouling of the field of vision of this optic 51 by, for example, shielding any dirt such as dust which can be deposited in the field of vision of this optics 51 during long-term parking of this motor vehicle for example. Thus, according to this particular embodiment, the optical sensor 5 is disposed in a bodywork element 11 disposed above the rear window 3 in the mounted state of the rear window 3 on the motor vehicle and the guide arm 95 is fixed on this bodywork element 11 comprising the optical sensor 5. On the other hand, still with reference to FIG. 5A, the specific spraying position may correspond to the parking position of the wiper blade 9.

Referring to Figure 5B, there is shown the wiper blade 9 during its movement between its first and second positions. During this movement, the spray device 7 ′ can spray cleaning liquid onto the external surface 3a of the rear window 3. In order to ensure rapid wiping of the sprayed cleaning liquid, it is sprayed onto the external surface 3a in the direction of movement of the wiper blade 9.

According to the variant shown with reference to Figures 5A and 5B, the rest position of the spray device 7 'corresponds to the first position of the wiper blade 9, the extreme spray position corresponds to the second position of the wiper blade 9, and the specific spray position corresponds to the parking position of the wiper blade 9.

According to a variant not shown here, the optics 51 of the optical sensor 5 can be arranged between the first and second positions of the wiper blade 9. According to this variant, the wiper blade 9 is configured to pass through the field of vision of the optics 51 so as to project cleaning liquid into the field of vision of this optics and to sweep this cleaning liquid during its movement between its first and second positions.

On the other hand, returning to the different embodiments shown with reference to Figures 1 to 5B, the electronic control unit 13 may include or be connected to image processing means (not shown) so to analyze the different images taken by the optical sensor 5 in order to determine the presence of dirt in the field of vision of the optics 51 and to determine the need to implement a step of cleaning the field of vision of this optics 51 .

The various embodiments described above are examples provided by way of illustrative and nonlimiting example. Indeed, it is entirely possible for a person skilled in the art to use such a wiping system 1 and in particular a mobile spraying device 7, 7 ′ with a wiping brush 9 moving on the rear window 3 in a translational movement. Furthermore, a person skilled in the art can envisage other types of movements for the projection nozzle 75 than translational and pivoting movements without departing from the scope of the invention as long as the projection nozzle 75 passes through a specific spray position.

Thus, obtaining a wiping system 1 allowing both cleaning of an external surface 3a of a rear window 3 and the optics 51 of an optical sensor 5 is possible thanks to the wiping system 1 described above. In particular, the mobility of the spray device 7, 7 'passing through a specific spray position allows the cleaning of the optics 51 of the optical sensor 5 using the same spray device 7, 7' as that used for cleaning the rear window 3 which in particular makes it possible to reduce the costs associated with cleaning this lens 51 and also the consumption of cleaning liquid 8 for cleaning this lens 51 and the external surface 3a of the rear window 3 .

Claims (1)

Claims [Claim 1] Wiping system (1) of a rear window (3) of a motor vehicle having at least one optical sensor (5) comprising an optic (51), said wiping system (1) having: - a spray device (7, 7 ’) configured to spray at least part of an external surface (3a) of the rear window (3) with a cleaning liquid (8), - at least one wiper blade (9) intended to be disposed in contact with the external surface (3a) of the rear window (3), said wiper blade (9) being configured to be moved on this external surface ( 3a) between a first and a second position in order to at least partially wipe this external surface (3a), and - a wiper drive motor (9) configured to allow the wiper blade (9) to move between its first and second positions, characterized in that the spray device (7, 7 ') is movable between a rest position and an extreme spray position, and in that the movement of the spray device (7, 7') has at least a specific position for spraying the optics (51) of the optical sensor (5), in which the cleaning liquid (8) is intended to be projected towards the optics (51) of the optical sensor (5). [Claim 2] Wiping system (1) according to the preceding claim, characterized in that it further comprises an electronic control unit (13) configured to control the movement of the wiper blade (9) between its first and second positions and for control the projection of cleaning liquid (8) as a function of the position of the wiper blade (9). [Claim 3] Wiping system (1) according to one of the preceding claims, characterized in that the spray device (7) is adapted to be mounted on a body element (11) of the motor vehicle. [Claim 4] Wiping system (1) according to claim 3, characterized in that the spray device (7) comprises a projection element (71) of angled shape having an inlet (73) for the cleaning liquid (8) and a projection nozzle (75) oriented at least partially in the direction of the external surface (3a) of the rear window (3) and configured to allow the projection of cleaning liquid (8), said projection nozzle (75) being movable between the rest position and the extreme spray position via the specific spray position optics (51) of the optical sensor (5) under the effect of an actuator (76). [Claim 5] Wiping system (1) according to claim 4, characterized in that the projection nozzle (75) is moved in translation between the rest position and the extreme spray position passing through the specific spray position of the optics (51) of the optical sensor (5). [Claim 6] Wiping system (1) according to claim 4, characterized in that the projection element (71) has a pivot connection (77) disposed at an elbow (79) present between the inlet (73) and the projection nozzle (75), and in that the displacement of the projection nozzle (75) comprises a first step of displacement in translation of the projection nozzle (75) between its rest position and its specific spray position and a second step of pivoting movement of the projection nozzle (75) between its specific position for spraying the optics (51) of the optical sensor (5) and its extreme spraying position, said pivoting movement being carried out along an axis perpendicular to a direction of extension of the projection nozzle (75) so as to move the projection nozzle (75) away from the external surface (3a) of the rear window (3). [Claim 7] Wiping system (1) according to one of claims 1 or 2, characterized in that the spraying device (7 ’) is carried by the wiping brush (9). [Claim 8] Wiping system (1) according to claim 7 taken in combination with claim 2, characterized in that the electronic control unit (13) is configured to allow the projection of cleaning liquid (8) by the device spraying (7 ') when the wiper blade (9) scans a predefined spraying area comprising the optics (51) of the optical sensor (5). [Claim 9] Wiping system (1) according to claim 8, characterized in that the predefined spraying zone corresponds to an angular range (a) less than or equal to 15 ° on either side of the optics (51) of the optical sensor (5). [Claim 10] Wiping system (1) according to claim 8, characterized in that the predefined dispersion zone of the wiper blade (9) corresponds to the specific position of spraying of the optics (51) of the optical sensor (5). [Claim 11] Wiping system (1) according to claim 10, characterized in that the electronic control unit (13) controls the stopping of the movement of the wiping brush (9) when the spraying device (7 ') is aligned with the optics (51) of the optical sensor (5), this position corresponding to the specific spraying position of the optics (51) of the optical sensor (5). [Claim 12] Wiping system (1) according to any one of Claims 7 to 11, characterized in that the optic (51) of the optical sensor (5) is arranged between the first and second positions of the wiping brush (9) and in that the wiper blade (9) has a plurality of openings configured to allow the projection of cleaning liquid (8) onto the external surface (3a) of the rear window (3) during its movement between its first and second positions. [Claim 13] Wiping system (1) according to claim 12, characterized in that the wiping brush (9) further comprises a parking position disposed before the first displacement position of the wiping brush (9) and in that the optic (51) of the optical sensor (5) is arranged between the parking position and the first position of the wiper blade (9). 1/4