Awning collector under the windshield of a motor vehicle

Abstract

The invention relates to an assembly (24) for a motor vehicle. The assembly (24) comprises: a cowl grille (30); a cowl collector (26) which includes: a rear edge (32) intended to run alongside a windshield (14); a transverse channel (34) arranged longitudinally between the rear edge and the cowl grille, the transverse channel comprising a bottom (36), a front edge (38), and being configured to collect rainwater flowing over the windshield. The transverse channel (34) includes a transverse barrier (46) which is movable vertically; the cowl collector includes an actuator (54) configured to move the transverse barrier (46) between a lower position below the front edge (38) and an upper position above the front edge in order to prevent water from flowing from the transverse channel towards the cowl grille (30). Figure to be published with the abbreviation: Figure 5

Description

Title of the invention: Under-windshield cowl collector for motor vehicles

[0001] The invention relates to the collection and drainage of runoff water from a motor vehicle windshield. The invention relates to a motor vehicle cowl collector. The invention also relates to an assembly comprising a cowl collector and a cowl grille. The invention further relates to a motor vehicle.

[0002] To improve occupant comfort, a motor vehicle is equipped with an air conditioning system. The air conditioning system generally includes a fan that draws in ambient air and a heat pump that warms this air before injecting it into the passenger compartment through various ventilation outlets. This configuration allows for temperature control while limiting primary energy consumption. In addition to heating the air, the air conditioning system may optionally be capable of dehumidifying the incoming air. The air conditioning system is generally referred to by the acronym "HVAC," which stands for "heating, ventilation, and air conditioning."

[0003] When a vehicle is exposed to tropical rainfall exceeding 20 mm / h, whether moving or stationary, the path of water on the vehicle creates a particular problem. Water falling on the windshield flows primarily forward, notably through the windshield pillar, and then through the cowl grille. Some of this water is directed outwards by seals designed to direct the flow towards the wheel well, while the remainder is channeled to the cowl collector. In the event of heavy rain, the water can overflow, passing through the cowl grille, and these droplets then accumulate in front of the inlet of the treatment system.

[0004] When the driver activates the heating of the treatment system, a problem arises. The treatment system creates a negative pressure at the canopy manifold by drawing in fresh air from outside. This air, however, carries with it a significant amount of water droplets. This phenomenon is exacerbated when the heating is activated during rain, resulting in substantial humidification of the inlet filter.

[0005] The major challenge lies in the fact that this excessive humidification of the filter leads to adverse consequences. Not only does it make the air inside the vehicle unpleasant for the occupants, but it also presents a substantial risk to the electrical mechanism of the treatment system. The presence of an im Water-carrying water in the system can lead to serious malfunctions, or even total failure.

[0006] US patent 10017131B2 describes a panel arrangement for a motor vehicle. The arrangement includes an air intake panel for ambient airflow and a service panel comprising a water collection area located below the airflow area. The water collection area is designed to drain water in the transverse direction of the vehicle, specifically toward a wheel well of the motor vehicle. However, its ability to block unwanted rainwater runoff remains limited. Moisture may still enter the treatment system.

[0007] US patent 10011305B2 describes a motor vehicle with a windshield, a hood, and an air and water guidance system. The guidance system extends from the base of the windshield under the hood. A base plate of the air and water guidance system has at least one longitudinal air passage opening under the hood. A transverse wall, in which air passages are provided, rises from the base plate along a rear edge of the hood. This arrangement limits water intake in the event of rain. However, its effectiveness remains limited in the event of heavy rain and high intake airflow. Furthermore, the size of the longitudinal passage generates a significant pressure drop, which reduces the energy required to achieve a given flow rate.

[0008] The invention aims to address at least one of the problems or drawbacks encountered in the prior art. In particular, the invention aims to limit the risk of water flowing from a canopy collector to a motor vehicle canopy grille. The invention also aims to optimize runoff water blocking, compactness, and pressure losses in an assembly comprising a canopy collector and a motor vehicle canopy grille.

[0009] According to a first aspect, the invention provides an assembly for a motor vehicle; the assembly comprising: a canopy grille; a canopy collector which includes: a rear edge intended to run along a windshield; a transverse channel arranged longitudinally between the rear edge and the canopy grille, the transverse channel including a bottom, a front edge, and being configured to collect rainwater flowing over the windshield; notable in that the transverse channel includes a transverse barrier which is movable vertically; the canopy collector including an actuator configured to move the transverse barrier between a lower position below the front edge and an upper position above the front edge in order to oppose a flow of water from the transverse channel towards the canopy grille.

[0010] It will be clearly understood that the invention proposes a deployable transverse barrier in the transverse channel in order to control the flow of water, and thus to protect the awning grille.

[0011] The transverse barrier prevents water from entering when raised and facilitates air intake through the grille when in the lowered position. This protects the associated air handling system. It reduces the energy required for extraction and heating, and prevents filter degradation due to humidity.

[0012] Document EP2212137B1 describes a method for controlling an air conditioning system in a vehicle to reduce the entry of moisture into the vehicle's passenger compartment. To this end, the amount of water present at the fresh air intake is measured based on a sensor signal. The air conditioning system is then controlled according to this measured amount of water at the fresh air intake. However, the method does not provide a solution applicable to a cowl vent.

[0013] Preferably, the transverse barrier comprises fabric, preferably a non-woven fabric.

[0014] Preferably, the transverse barrier comprises polytetrafluoroethylene; preferably, the transverse barrier comprises a hydrophobic coating.

[0015] Preferably, the transverse barrier comprises a stiffening frame.

[0016] Preferably, the transverse channel comprises a transverse slot with sealing gaskets configured to cooperate hermetically with the transverse barrier.

[0017] Preferably, the transverse channel comprises a front partition forming the front edge, a rear partition forming the rear edge; the transverse barrier being arranged in the rear partition; preferably the rear partition extends from the bottom.

[0018] Preferably, the transverse barrier includes a curved profile; and / or the transverse channel includes an evacuation section transversely at a distance from the transverse barrier.

[0019] Preferably, the transverse channel comprises a transverse width, the transverse barrier extending over 10% to 40% of the transverse width; preferably over 15% to 30% of the transverse width.

[0020] Preferably, the transverse channel includes a wiper orifice, the transverse barrier being transversely at a distance from said wiper orifice.

[0021] Preferably, the transverse channel and the canopy grid are made of material.

[0022] Preferably, the transverse barrier is in the transverse slot.

[0023] Preferably, the stiffening frame supports the fabric.

[0024] Preferably, the transverse barrier comprises a membrane with an air-porous and water-tight material.

[0025] Preferably, the transverse barrier comprises a membrane.

[0026] Preferably, the canopy grille is a suction grille and / or an air intake grille.

[0027] Preferably, the lower position below the front edge and the upper position above the upper edge are measured transversely at the level of the air inlet grille.

[0028] Preferably, in the lower position the transverse barrier is elevated relative to the bottom.

[0029] Preferably, the transverse channel comprises a transverse end, the discharge section extending from the transverse end.

[0030] Preferably, the bottom is between the front edge and the rear edge.

[0031] The invention also relates to a motor vehicle assembly; the assembly comprising: a cowl grille; a cowl collector comprising: a rear edge intended to run alongside a windshield; a cowl grille; a transverse channel arranged longitudinally between the rear edge and the cowl grille, the transverse channel comprising a bottom and a front edge, and being configured to collect rainwater flowing over the windshield; notable in that the transverse channel comprises an air-porous and water-impermeable transverse membrane, said transverse membrane being arranged between the rear edge and the cowl grille in the transverse channel in order to prevent water from flowing from the transverse channel to the cowl grille. Such a transverse membrane prevents water from entering the cowl grille while allowing air to pass through.The corresponding canopy collector optimizes protection against moisture and pressure loss by drawing air in at the level of the transverse membrane.

[0032] Preferably, the transverse membrane is a transverse barrier, and the canopy collector includes an actuator configured to move the transverse barrier between a lower position below the front edge and an upper position above the front edge of the transverse channel in order to oppose a flow of water from the transverse channel towards the canopy grid.

[0033] According to another aspect, the invention proposes a motor vehicle comprising a front hood, a windscreen, an assembly between the front hood and the windscreen; remarkable in that the assembly conforms to the invention.

[0034] Preferably, the front hood includes a rear portion, in the upper position the transverse barrier is under the rear portion.

[0035] Preferably, the motor vehicle includes a rain sensor, a controller connected to the rain sensor and the actuator; the motor vehicle is configured so that when the rain sensor detects rain, the controller commands the actuator to move the transverse barrier to the upper position.

[0036] Preferably, when the rain sensor detects rain with a flow rate greater than or equal to 20 mm / h, the controller commands the actuator to move the transverse barrier to the upper position.

[0037] Each feature introduced by the expression "preferably" given in relation to one of the aspects of the invention applies to all other aspects of the invention.

[0038] The invention will be well understood and other aspects and advantages will become clear upon reading the following description, given with reference to the attached figures listed below.

[0039] Fig. 1 is a side view of a motor vehicle according to the invention.

[0040] Figure 2 shows a windscreen and assembly for a motor vehicle according to the invention.

[0041] Fig. 3 is a front view of an assembly for a motor vehicle according to the invention, the transverse barrier being in the upper position.

[0042] Fig. 4 is a cross-section of an assembly for a motor vehicle according to the invention, the transverse barrier being in the lower position.

[0043] Fig. 5 is a cross-section of an assembly for a motor vehicle according to the invention, the transverse barrier being in the upper position.

[0044] In the following description, the term "include" is synonymous with "include" and is not limiting in that it permits the presence of other elements in the motor vehicle or the assembly to which it relates. It is understood that the term "include" includes the terms "consist of". The terms "external" and "internal" shall respectively designate what is oriented towards the outside of the vehicle and towards the inside of the vehicle.

[0045] In this description, the terms "longitudinal," "longitudinally," "transverse," and "transversely" are used with respect to the vehicle's frame of reference in the mounting configuration. The term "longitudinal" refers to the principal direction of travel of the vehicle. The term "transverse" refers to a direction perpendicular to the principal direction of travel of the vehicle. The term "front" refers to the principal direction of travel of the vehicle. The term "rear" refers to the opposite of the front of the vehicle.

[0046] The X-axis represents the longitudinal direction, the Y-axis represents the transverse direction, and the Z-axis represents the vertical direction of the motor vehicle. These three axes define a right-handed trihedron whose orientation is preserved throughout the figures.

[0047] In the present description, equality between values ​​is not to be understood in the strict sense insofar as each equality allows a variation of at most 10%, preferably at most 5%, more preferably at most 2%, between these values.

[0048] In this description, the terms "vertical" and "horizontal" are not to be understood in their strict sense. Indeed, they allow an inclination of at most 20°, preferably at most 10°, more preferably at most 5°, and even more preferably at most 2°; with respect to the strict meaning of these terms.

[0049] In this description, the technical characteristics are defined in the assembly mounting configuration, unless otherwise explicitly stated.

[0050] Throughout the description, the different figures use the same reference signs to designate identical or similar entities.

[0051] Figure 1 represents a motor vehicle 10 according to the invention. The motor vehicle 10 comprises energy storage means and at least one motor (not shown) adapted to drive said motor vehicle 10.

[0052] The motor vehicle 10 comprises a structure 12 and several glazed surfaces, including a windshield 14. The windshield 14 delimits the front of the passenger compartment 16 of the motor vehicle 10. The passenger compartment 16 is intended to accommodate the occupants (not shown) of the motor vehicle 10. The structure 12 supports various openings providing access to the passenger compartment 16 or to other compartments. The openings include a front hood 18, generally called the engine hood. The front hood 18 is movable between a closed position flush with the bodywork and an open position raised, for example, at the level of the windshield 14.

[0053] To ensure the comfort of the occupants, including the driver and passengers (not shown), the motor vehicle 10 includes an air handling system 20. The air handling system 20 may be an air conditioning system. The air handling system 20 is capable of drawing in outside air from the motor vehicle and directing it into the passenger compartment 16 after treatment. The air handling system 20 may include a heater. The air handling system 20 is also capable of cooling and optionally dehumidifying the air.

[0054] The processing system 20 is controlled by a controller 22. The controller 22 can be a computer such as the on-board computer of the motor vehicle, or a programmable electronic card.

[0055] The motor vehicle 10 includes an assembly 24, such as a canopy assembly. The assembly 24 is arranged at the base of the windshield 14 and behind the front hood 18. The assembly 24 includes a canopy grille (not shown) and a canopy manifold 26. The canopy manifold 26 is, for example, attached to the structure 12. The canopy manifold 26 is covered by the front hood 18. The canopy grille communicates with the air treatment system 20. It forms an air intake grille through which the air treatment system 20 draws in ambient air and injects it into the passenger compartment 16.

[0056] The motor vehicle can, for example, be a private motor vehicle or a commercial motor vehicle.

[0057] Figure 2 shows a motor vehicle assembly 24 and a windshield 14. The motor vehicle may correspond to the one shown in relation to Figure 1. The front hood is not shown for clarity. Two windshield wiper devices 28 are shown.

[0058] The assembly 24 comprises: a canopy grille 30; a canopy collector 26 longitudinally between the canopy grille 30 and the windshield 14. According to one option, the canopy grille 30 is divided transversely into several transverse segments. The canopy grille 30 extends transversely over at least half of the windshield 14.

[0059] The canopy collector 26 includes a rear edge 32 running along the windshield 14. The rear edge 32 is concave. It conforms to the windshield 14. The canopy collector 26 also includes a transverse channel 34 arranged longitudinally between the rear edge 32 and the canopy grille 30. The transverse channel 34 extends transversely across the entire width of the windshield 14. The transverse channel 34 forms a gutter that collects water running off the windshield 14 and then discharges it laterally; for example, towards the wheel arches.

[0060] The transverse channel 34 has a V-shaped or possibly U-shaped cross-section. The transverse channel 34 comprises a bottom 36 and a front edge 38 on the side of the canopy grille 30. Its volume allows it to store water when the rainfall intensity approaches that of the runoff. The front edge 38 is convex.

[0061] The front edge 38 and the rear edge 32 are longitudinally opposed. They form the front and rear apexes of the transverse channel 34. They are generally parallel. The front edge 38 is between the bottom 36 and the windshield 14. The cowl grille 30 extends longitudinally from the front edge 38.

[0062] The wiper devices 28 pass through the canopy collector 26 at the transverse channel 34. The transverse channel 34 includes wiper orifices 40 passing vertically through it.

[0063] The transverse channel 34 includes a drainage section 42. Each drainage section 42 forms a lateral end of the transverse channel 34. Each drainage section 42 includes a low point of the transverse channel 34. The transverse channel 34 includes a transverse width 44. The transverse width 44 of the transverse channel 34 is equal to that of the windshield 14.

[0064] Figure 3 shows a motor vehicle assembly. The motor vehicle may correspond to the one shown in relation to one of Figures 1 to 2. The front hood and windshield are not shown for clarity. Rainwater runoff is represented by dashed arrows.

[0065] The assembly 24 comprises: a canopy grille 30 and a canopy collector 26. They are optionally made of the same material, or alternatively attached to each other. The canopy collector 26 has a rear edge 32 intended to run along the windshield; a transverse channel 34 arranged longitudinally between the rear edge 32 and the canopy grille 30. The transverse channel 34 comprises a bottom 36 and a front edge 38. The transverse channel 34 is configured to collect rainwater from the windshield.

[0066] The transverse channel 34 includes a transverse barrier 46. The transverse barrier 46 forms an obstacle to the flow of runoff water from the windshield. It creates a baffle, a paddle, adapted to control the flow of water by diverting it. The transverse barrier 46 is movable vertically relative to the transverse channel 34.

[0067] The canopy collector 26 further includes an actuator configured to move the transverse barrier 46 between a lower position below the front edge 38 and an upper position (visible in the present figure) above the front edge 38. This prevents water from flowing from the transverse channel 34 towards the canopy grid 30. Indeed, all the water heading towards the grid is diverted by the transverse barrier 46.

[0068] The transverse barrier 46 is a sliding barrier. It is vertical. It has a constant thickness. According to one option, it is substantially inclined backwards. The transverse barrier 46 extends over 10% to 40% of the transverse width of the transverse channel 34; preferably over 15% to 30% of the transverse width of the transverse channel 34. Optimizing the width of the transverse barrier 46 provides a compromise on pressure losses. The transverse barrier 46 can be a lateral barrier. According to one option of the invention, the canopy collector comprises two lateral barriers; for example, symmetrical ones.

[0069] The transverse channel 34 includes a wiper opening 40, the transverse barrier 46 being transversely spaced at a distance from said wiper opening 40. This arrangement preserves compactness and facilitates the swashplate's angle of travel. The discharge section 42 is transversely spaced at a distance from the transverse barrier 46. The transverse channel 34 includes a transverse end 48, and the discharge section 42 extends from the transverse end 48.

[0070] The transverse barrier 46 comprises a curved profile, at least when viewed from above. It has a convex front face and a concave rear face. This shape allows for a transverse widening outwards, towards the drainage section 42. This feature of the invention optimizes the protection of the canopy grille 30. The transverse barrier 46 advantageously comprises a transverse membrane 50. The transverse barrier 46 acts as a filter, blocking water while allowing air to pass through.

[0071] Figure 4 shows a cross-section of a motor vehicle assembly 24. The vehicle The automobile may correspond to that shown in relation to one of Figures 1 to 3. The transverse barrier 46 is shown in its lowered, or folded-down, position.

[0072] The transverse barrier 46 is arranged in the recess of the canopy collector 26. It is longitudinally spaced from the canopy grille 30. The transverse barrier 46, in particular the transverse membrane 50, is air-permeable and water-impermeable. The transverse barrier 46, in particular the transverse membrane 50, comprises fabric, preferably a non-woven fabric. Generally, the fabric comprises fibers.

[0073] Thus, the transverse barrier 46 retains water and allows the passage of air drawn in through the canopy grille 30. It optimizes the suction pressure loss and the control of humidity entering through the canopy grille 30. In general, this preserves the air treatment system.

[0074] Preferably, the transverse barrier 46 comprises polytetrafluoroethylene, generally designated by the acronym PTFE. In this context, this material optimizes the durability, mass, and porosity of the fabric. Preferably, the transverse barrier comprises a hydrophobic coating. This feature prevents the transverse barrier 46 from becoming saturated with water and losing its breathability.

[0075] The transverse barrier 46 includes a stiffening frame 52. The stiffening frame 52 forms, for example, a rectangle or a ladder. This allows it to be held in position and facilitates deployment via the actuator 54. The stiffening frame can be made of metal or plastic. The actuator 54 is, for example, a cylinder.

[0076] The transverse channel 34 includes a transverse slot 56. The transverse slot 56 forms a vertical opening. It delimits a vertical passage receiving the transverse barrier 46. The transverse barrier 46 is movable within the transverse slot 56. The transverse slot 56 includes sealing gaskets 58 at its edges. The sealing gaskets 58 are configured to cooperate hermetically with the transverse barrier 46. They rub and slide against its front and rear faces during vertical movements.

[0077] The transverse channel 34 includes a front partition 60 forming the front edge 38, a rear partition 62 forming the rear edge 32. The transverse barrier 46 is arranged in the rear partition 62. The rear partition 62 extends from the bottom 36. According to one option, the rear edge 32 is above the front edge 38. The front edge 38 overhangs the canopy grille 30.

[0078] One of the advantages of the lower position of the transverse barrier 46 is to prevent the transverse channel 34 from becoming clogged. This avoids the accumulation of debris. In addition, the lower position does not create pressure losses for air intake through the canopy grille 30.

[0079] According to an alternative embodiment of the invention, the actuator includes a device for winding the transverse barrier under the transverse channel. Optionally, in the lower position, the transverse barrier is wound under the transverse channel.

[0080] Figure 5 shows a cross-section of a motor vehicle assembly 24. The motor vehicle may correspond to the one shown in relation to one of Figures 1 to 4. The transverse barrier 46 is in its raised position. It retains rainwater running off the windshield 14 and flowing into the transverse channel 34. The transverse barrier 46 thus forms a half-channel behind the transverse channel 34. It is noteworthy that another half-channel is in front of the transverse barrier 46. This one remains dry because it is empty.

[0081] The assembly 24 comprises: a canopy grille 30 and a canopy collector 26 with a front edge 38 and a rear edge 32 running along the windshield 14. A transverse channel 34 separates the rear edge 32 from the canopy grille 30. The transverse channel 34 is configured to collect rainwater from the windshield 14. The transverse channel 34 includes a transverse barrier 46 movable vertically relative to the transverse channel 34 by means of an actuator 54 moving the transverse barrier 46 between a lower position between the front edge 38 and the bottom 36, and an upper position (visible in the present figure) above the front edge 38 in order to prevent water from flowing from the transverse channel 34 towards the canopy grille 30. The canopy grille 30 comprises a plurality of meshes. It forms a filter that blocks the largest impurities.

[0082] The lower position and the upper position above the upper edge are measured transversely at the level of the canopy grid 30. They are measured on the upper edge of the transverse barrier 46.

[0083] The motor vehicle includes a rain sensor 64. The controller 22 is connected to the rain sensor 64 and to the actuator 54. The motor vehicle is configured so that when the rain sensor 64 detects rain in front of the windshield 14, it emits a rain presence signal. This signal is received by the controller 22, which then commands the actuator 54. It supplies power to the actuator so as to move the transverse barrier 46 upwards. It extends to the upper position. The rain sensor 64 can be coupled to a windshield wiper actuation system (not shown).

[0084] The rain sensor 64 is located behind the windshield 14. It is fixed to it. It includes, for example, a camera that detects rain in front of the motor vehicle, or water droplets on the windshield 14. According to an alternative embodiment of the invention, the rain sensor is arranged on the front panel.

[0085] According to one option of the invention, when the rain sensor 64 detects rain, the controller commands the actuator to raise the transverse barrier 46 to provided that the rainfall reaches a flow threshold, or precipitation flux threshold. The flow threshold can be rainfall with a flow rate greater than or equal to 10 mm / h, preferably greater than or equal to 20 mm / h, and more preferably greater than or equal to 30 mm / h. This increases the instances where the transverse barrier 46 remains retracted, which limits head losses.

[0086] The front hood 18 includes a rear portion 66. The rear portion 66 is above the cowl collector 26 and opposite the windshield 14. In its upper position, the transverse barrier 46 is below the rear portion 66. According to one option of the invention, the transverse barrier 46 touches it. Optionally, the transverse barrier is a porous shutter.

[0087] The controller 22 may include a computer 68 and a storage module 70. The computer 68 may be a microprocessor. The storage module 70 may be a storage medium. It may be a hard drive or flash memory. The storage module 70 is capable of storing a computer program. The computer program comprises code instructions which, when executed by the computer, cause it to implement a method for controlling the transverse barrier.

[0088] According to a preferred embodiment, the canopy collector is made of a plastic or composite material. The plastic material may include a thermoplastic or thermosetting material. According to a preferred embodiment, the plastic material is selected from the group comprising polypropylene, polyamide, polyphthalamide, polyetheretherketone, polyphenylene sulfide, polyamide-imide, polyetherimide, polyarylamide, polyepoxide, unsaturated polyester, vinyl ester, or polyester-vinylester resins. For example, the composite material comprises a matrix of a plastic material as described above with reinforcement. For example, the reinforcement comprises glass or carbon fibers.

[0089] The canopy collector 26 comprises at least 10% by weight of recycled plastic material based on the total weight of the plastic material; preferably from 10 to 80% by weight; more preferably from 20 to 60% by weight or from 30 to 40% by weight. The use of recycled plastic material reduces the environmental footprint of the motor vehicle.

[0090] Any characteristic defined in relation to the transverse barrier applies to the transverse membrane; and vice versa.

[0091] The invention comprises the combination of all the embodiments illustrated by all the figures.

[0092] Figures 2 and 3 are isometric views. They each respect a specific scale, real angles and real proportions.

Claims

Demands

1. Assembly (24) for a motor vehicle (10); the assembly (24) comprising: a canopy grille (30); a canopy collector (26) which includes: a rear edge (32) intended to run alongside a windscreen (14); a transverse channel (34) arranged longitudinally between the rear edge (32) and the canopy grille (30), the transverse channel (34) comprising a bottom (36), a front edge (38), and being configured to collect rainwater flowing over the windscreen (14); characterized in that the transverse channel (34) includes a transverse barrier (46) which is vertically movable; the canopy collector (26) including an actuator (54) configured to move the transverse barrier (46) between a lower position below the front edge (38) and an upper position above the front edge (38) in order to oppose a flow of water from the transverse channel (34) towards the canopy grid (30).

2. Assembly (24) according to claim 1, characterized in that the transverse barrier (46) comprises fabric, preferably a non-woven fabric.

3. Assembly (24) according to any one of claims 1 to 2, characterized in that the transverse barrier (46) comprises polytetrafluoroethylene; preferably, the transverse barrier (46) comprises a hydrophobic coating.

4. Assembly (24) according to any one of claims 1 to 3, characterized in that the transverse barrier (46) comprises a stiffening frame (52).

5. Assembly (24) according to any one of claims 1 to 4, characterized in that the transverse channel (34) comprises a transverse slot (56) with sealing joints (58) configured to cooperate hermetically with the transverse barrier (46).

6. Assembly (24) according to any one of claims 1 to 5, characterized in that the transverse channel (34) comprises a front partition (60) forming the front edge (38), a rear partition (62) forming the rear edge (32); the transverse barrier (46) being arranged in the rear partition (62); preferably the rear partition (62) extends from the bottom (36).

7. Assembly (24) according to any one of claims 1 to 6, characterized in that the transverse barrier (46) comprises a curved profile; and / or the transverse channel (34) comprises an evacuation section (42) transversely at a distance from the transverse barrier (46).

8. Assembly (24) according to any one of claims 1 to 7, characterized in that that the transverse channel (34) comprises a transverse width (44), the transverse barrier (46) extending over 10% to 40% of the transverse width (44); preferably over 15% to 30% of the transverse width (44).

9. Motor vehicle (10) comprising a front hood (18), a windscreen (14), an assembly (24) between the front hood (18) and the windscreen (14); characterized in that the assembly (24) conforms to any one of claims 1 to 8; preferably the front hood (18) comprises a rear portion (66), in the upper position the transverse barrier (46) is under the rear portion (66).

10. Motor vehicle (10) according to claim 9, characterized in that the motor vehicle (10) comprises a rain sensor (64), a controller (22) connected to the rain sensor (64) and to the actuator (54); the motor vehicle (10) is configured such that when the rain sensor (64) detects rain, the controller (22) commands the actuator (54) to move the transverse barrier (46) to the upper position; preferably, when the rain sensor (64) detects rain with a flow rate greater than or equal to 20 mm / h, the controller (22) commands the actuator (54) to move the transverse barrier (46) to the upper position.

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