Washing bar for an optical sensor of a motor vehicle, and associated washing system

Abstract

The invention relates to a washing bar (18) for an optical sensor of a motor vehicle, the washing bar comprising: • a first washing liquid compartment (24); • at least one first washing liquid inlet nozzle (26) and at least one first washing liquid outlet nozzle (28), all of which are in communication with the first compartment (24), wherein the bar (18) comprises at least one second washing liquid compartment (30), as well as at least one second washing liquid inlet nozzle (32) and at least one second washing liquid outlet nozzle (34), all of which are in communication with the at least one second compartment (30), and are hydraulically independent of the first compartment (24), the at least one first washing liquid inlet nozzle (26) and the at least one first washing liquid outlet nozzle (28).

Description

WASHING RAMP FOR AN OPTICAL SENSOR OF A MOTOR VEHICLE, AND ASSOCIATED WASHING SYSTEM Technical field of the invention

[0001] The invention relates to a washing ramp for an optical sensor of a motor vehicle, a washing system comprising such a ramp, and an optical sensor assembly comprising such a system. Technical background

[0002] Sensor assemblies are increasingly used for multiple applications in the automotive industry. In addition to widely known applications such as short-range obstacle detection using ultrasonic devices, long-range obstacle detection using radar devices or cameras, there is a desire to develop increasingly precise sensor assemblies to enable refined detection of the vehicle's environment while it is moving. Indeed, the next developments in driver assistance systems or autonomous driving require the ability to reliably and safely detect obstacles or dangerous situations so that the vehicle driver, who wishes to abandon all or part of the driving of the vehicle, can do so with complete confidence.

[0003] To achieve this, optical sensors are increasingly being used. One well-known technology is camera detection. Another technology that is currently expanding is the use of LIDAR sensors, an acronym for "light detection and ranging" or "laser imaging detection and ranging," which allows distance measurements based on analyzing the properties of a laser light beam reflected back to its emitter.

[0004] The analysis of the data provided by the LIDAR sensors not only makes it possible to determine the position of vehicles or obstacles surrounding the vehicle, but also, by means of trajectory calculation algorithms, to predictively determine the trajectory of vehicles surrounding the transmitting vehicle in order to determine, taking into account the desired trajectory of the transmitting vehicle, whether it risks encountering the trajectory of a surrounding vehicle or object. The determination of these trajectories then makes it possible to automatically correct the trajectory of the transmitting vehicle and thus avoid any risk of collision.

[0005] In a vehicle, sensor assemblies include optical sensors such as LIDAR or other sensors, protected by glass surfaces. These sensor assemblies are generally placed on an exterior surface of the bodywork. In this location, the glass surfaces may be subject to the elements and various projections that may result from the vehicle being parked or moving in an outdoor environment.

[0006] Regardless of the type of optical sensor used, it is essential that the glass surfaces protect the optical sensors and that this protection does not interfere with the measurement that these sensors can perform. It is therefore essential to keep these glass surfaces systematically clean and free of impurities that could distort the distance measurement made by the sensors.

[0007] Conventionally, one method for cleaning these glass surfaces is to spray them with washing liquid. Since the glass surface of a sensor assembly is generally large, it is necessary to provide a large number of outlet nozzles to cover the entire surface. These nozzles are conventionally all supplied simultaneously by a single pump.

[0008] This design has some drawbacks.

[0009] On the one hand, the use of a significant number of spray nozzles or jets involves a large consumption of washing liquid, even though spraying the entire glass surface is not necessarily useful, as the deposited impurities may be located on only part of the glass surface, for example the LIDAR transmitter or receiver.

[0010] On the other hand, the simultaneous supply of all the nozzles by the same pump requires having a pump capable of providing a high output pressure and a high flow rate required at the pump outlet, in order to have sufficient output pressure and sufficient flow rate at the outlet of each spray nozzle. However, such a pump is particularly expensive, compared to an ordinary windshield washer type pump.

[0011] To overcome this drawback, document US-2023 / 059307–A describes a common rail type washing ramp comprising a plurality of washing nozzles, this ramp being supplied by a single inlet nozzle and the nozzles being controlled by solenoid valves. However, such a ramp requires as many solenoid valves as nozzles and is therefore extremely expensive.

[0012] There is therefore a real need for a washing ramp capable of locally spraying the glass surface of the sensor(s) only where necessary. There is also a real need for a washing system using standard components and at a controlled cost.

[0013] The invention meets this need by proposing a washing ramp in which the nozzles can be supplied independently of each other.

[0014] For this purpose, the invention proposes a washing ramp for an optical sensor of a motor vehicle, comprising: a first washing liquid compartment, - at least one first washing liquid inlet nozzle and at least one first washing liquid outlet nozzle which all communicate with said first compartment, said ramp comprising at least one second washing liquid compartment, as well as at least one second washing liquid inlet nozzle and at least one second washing liquid outlet nozzle all communicating with the at least one second compartment, and hydraulically independent of the first compartment, of the at least one first washing liquid inlet nozzle and of the at least one first washing liquid outlet nozzle.

[0015] Such a ramp makes it possible to supply the at least one second outlet nozzle independently of the at least one first outlet nozzle, so that the washing liquid pressure of a compartment is only intended for the outlet nozzle associated with it, or the outlet nozzles associated with it.

[0016] Therefore, on the one hand, it is possible, with such a washing ramp, to supply washing liquid only to a part of the compartments of the ramp, and consequently to discharge washing liquid only through a part of the outlet nozzles of the ramp, depending on the specific cleaning needs relating to a corresponding part of the glass surface protecting the optical sensor. This configuration advantageously makes it possible to save washing liquid and to dispense it only for actual washing needs.

[0017] On the other hand, each washing liquid compartment can be supplied independently of the others with a pump to guarantee an optimal outlet pressure corresponding to the number of outlet nozzles associated with this compartment, and to the type of zone to be cleaned, namely a zone corresponding to a transmitter or one corresponding to a receiver. It is therefore possible, by a relevant subdivision of the washing ramp into smaller compartments, to use for the supply of each compartment a conventional windscreen washer type pump, less expensive than a high pressure pump which would be necessary to simultaneously supply all the outlet nozzles of the washing ramp.

[0018] According to other characteristics of the invention: the washing ramp comprises a single-piece body comprising at least one first washing liquid outlet nozzle and at least one second washing liquid outlet nozzle, said single-piece body also comprises the first compartment and its at least one first washing liquid inlet nozzle and the at least one second compartment and its at least one second washing liquid inlet nozzle, all made of a single material with said body, said single-piece body receives a first added module and at least one second added module, the first added module comprises at least one first compartment and the associated washing liquid inlet nozzle(s) and the second added module comprises at least one second compartment and the associated washing liquid inlet nozzle(s), each compartment communicates with at least one of the nozzles of the single-piece body.

[0019] The invention also relates to a washing system comprising at least: a washing liquid reservoir, at least one washing liquid pump supplied by said at least one reservoir, a washing ramp of the type described above, and washing liquid orientation means capable of selectively directing the pumped washing liquid towards one or more of the at least one first washing liquid inlet nozzle and at least one second washing liquid inlet nozzle selected.

[0020] The washing system according to the invention advantageously makes it possible to select through which outlet nozzle(s) the washing liquid can be sprayed, and consequently allows localized spraying, synonymous with saving washing liquid.

[0021] According to other characteristics of the washing system: the washing system comprises a plurality of single-outlet pumps supplied by said at least one reservoir, the outlet of each pump is connected directly to only one of the inlet nozzles, the washing liquid orientation means comprise control means capable of selectively activating each pump of said plurality of single-outlet pumps, the washing system comprises at least one two-outlet pump delivering alternately according to a direction of rotation of the pump, each outlet of the pump is connected directly to a single inlet nozzle, the washing liquid orientation means comprise control means capable of activating the at least one two-outlet pump and controlling its direction of rotation, the washing liquid orientation means comprise at least one solenoid valve, the at least one solenoid valve has an inlet and two outlets,the inlet of the at least one solenoid valve is connected to an outlet of a pump, and said pump has a single outlet, each outlet of the at least one solenoid valve supplies only one of the inlet nozzles, the washing liquid orientation means further comprise at least one hydraulic switch, an inlet of said at least one hydraulic switch is connected to an outlet of at least one solenoid valve, each outlet of the at least one switch is connected directly to only one of the inlet nozzles, the single outlet pump is a pressure-controlled pump, the hydraulic switch is a mechanically controlled switch whose switching between its two outlets is controlled by the pressure of the washing liquid received by its inlet.,

[0022] The invention also relates to a motor vehicle optical sensor assembly of the LIDAR type, comprising: a LIDAR type sensor comprising a field of vision segmented into a plurality of zones, a washing system of the type previously described, in which each outlet nozzle of the ramp is arranged opposite one of the zones.

[0023] Such an optical sensor assembly has a large glass surface, which can therefore be cleaned selectively by using only part of the outlet nozzles. Consequently, such an optical sensor assembly presents reduced risks of measurement errors.

[0024] The invention finally relates to a method for controlling a washing system of the type previously described, comprising at least the steps of: operating the pump by directing the washing liquid towards the first inlet nozzle determined with the washing liquid directing means, operating the pump by directing the washing liquid towards at least the second nozzle determined with the washing liquid directing means.

[0025] According to a particular embodiment of this method suitable for cleaning a LIDAR type sensor, the method comprises at least the steps of:determining, using the LIDAR sensor, an area of ​​the field of vision of said sensor which is soiled,operating the pump by directing the washing liquid towards the nozzle which is opposite the soiled area with the means for directing the washing liquid. Brief description of the figures

[0026] Other characteristics and advantages of the invention will appear during the reading of the detailed description which follows for the understanding of which reference will be made to the appended drawings in which: La is a perspective view of an optical sensor of the LIDAR type equipped with a washing ramp according to the invention; La is a schematic sectional view of a first embodiment of a washing ramp according to the invention; La is a schematic view of a first embodiment of a washing system comprising the first embodiment of the washing ramp according to the invention; La is a perspective view of a first embodiment of a washing system comprising a second embodiment of a washing ramp according to the invention; La is a perspective view of a second embodiment of a washing system comprising the second embodiment of the washing ramp according to the invention;Lais a perspective view of a third embodiment of a washing system comprising the second embodiment of the washing ramp according to the invention;Lais a schematic view of a fourth embodiment of a washing system comprising the first embodiment of the washing ramp according to the invention;Lais a schematic view of a fifth embodiment of a washing system comprising the first embodiment of the washing ramp according to the invention;Lais a schematic view of a protective glazed surface of an optical sensor of the LIDAR type.; Detailed description of the invention

[0027] An assembly 10 of an optical sensor for a motor vehicle is shown. This assembly 10 comprises a bodywork element 12 of the motor vehicle from which projects a housing 14 housing an optical sensor (not shown) protected by a glazed surface 16. Extending along the glazed surface 16 is arranged a washing ramp 18 comprising at least one outlet nozzle 28 facing the glazed surface 16 and capable of projecting onto the latter a jet 22 of washing liquid capable of ensuring its cleaning. Preferably, the washing ramp 18 comprises a plurality of outlet nozzles 28

[0028] Without limiting the invention, the optical sensor which is protected by the glass surface 16 may be a LIDAR type optical sensor, or another type of optical sensor.

[0029] Conventionally, a washing ramp of the ramp 18 type is a ramp comprising a common compartment of washing liquid supplying a plurality of outlet nozzles. This design is significantly disadvantageous for several reasons:

[0030] In most cases, this type of ramp is designed to supply all the outlet nozzles simultaneously. If the glass surface is large, it is necessary to have a sufficient number of nozzles facing it to cover the entire surface. However, it is not necessarily necessary to spray the entire surface with washing liquid if only a single part of it is dirty. This type of ramp therefore results in a significant consumption of washing liquid, which is wasted. Furthermore, supplying all the nozzles with sufficient outlet pressure requires the use of a high-pressure, high-flow pump, which makes a washing system with such a ramp particularly expensive.

[0031] According to another known variant of the state of the art, such a ramp can also include solenoid valves intended to selectively allow the passage of washing liquid through the outlet nozzles. This design, which requires one solenoid valve per outlet nozzle, also proves to be particularly expensive.

[0032] As illustrated in principle in Figures 2, 3, 7 and 8, the invention overcomes these drawbacks by proposing a ramp 18 comprising a first compartment 24 of washing liquid, at least one first washing liquid inlet nozzle 26 and at least one first washing liquid outlet nozzle 28.

[0033] The invention represents, in a non-limiting manner, a single first inlet nozzle 26 and two first jets 28 all communicating with the first compartment 24.

[0034] According to the invention, the ramp 18 comprises at least one second compartment 30 for washing liquid, as well as at least one second inlet nozzle 32 for washing liquid and at least one second outlet nozzle 34 for washing liquid all communicating with the at least one second compartment. These at least second inlet nozzle 32, second nozzle 34, and compartment 30 are hydraulically independent of the first compartment 24, of the at least one first inlet nozzle 26 for washing liquid and of the at least one first outlet nozzle 28 for washing liquid. The figure represents, in a non-limiting manner of the invention, a single second inlet nozzle 32 and two second nozzles 34 all communicating with the second compartment 30.

[0035] It will be understood that the ramp 18 is configured to be adapted in length to the glazed surface 16 of the sensor assembly that it is to spray, and for this it can comprise a number of adapted compartments. For example, the represents a ramp 18 comprising the first compartment 24 communicating with the single first nozzle 26 and the two first nozzles 28, the second compartment 30 communicating with the single second nozzle 32 and the two second nozzles 34, and a third compartment 36 communicating with a single third nozzle 38 and two third nozzles 40. It will be understood that the number of nozzles associated with each compartment depends on the supply pressure that is likely to be supplied to this compartment by the associated inlet nozzle, this supply pressure depending on the pump used in the washing system, as will be seen later in the remainder of this description.

[0036] Several resolution methods can be considered for the effective implementation of ramp 18.

[0037] According to a first embodiment of the washing ramp which has been shown in figures 2, 3, 7, 8, the ramp 18 comprises a single-piece body comprising the at least one first washing liquid outlet nozzle 24 and the at least one second washing liquid outlet nozzle 34, 40. This single-piece body 42 also comprises the first compartment 24 and its at least one first washing liquid inlet nozzle 26 and the at least one second compartment 30, 36 and its at least one second washing liquid inlet nozzle 32, 38, all integral with said body. This design is relatively simple and can be produced by injection of a plastic material or by a combination of injection of a plastic material and welding of plastic material.

[0038] According to a second embodiment of the washing ramp which has been shown in figures 4 to 6, the ramp 18 still comprises a single-piece body 42, but which only comprises the at least one first washing liquid outlet nozzle 28 and the at least one second washing liquid outlet nozzle 34.

[0039] The ramp 18 in this case is made in two parts. The single-piece body 42 receives a first added module 44 and at least one second added module 46. In a non-limiting manner of the invention, in Figures 4 to 6, the ramp 18 comprises two groups of outlet nozzles, namely a first group of five first nozzles 28, and a second group of five second nozzles 34. The group of first outlet nozzles 28 is associated with the first added module 44 and the group of second outlet nozzles 34 is associated with the second added module 46.

[0040] The first added module 44 comprises at least one first compartment similar to the compartment 24 previously described and the associated washing liquid inlet nozzle(s) 26. In Figures 4 to 6, in a non-limiting manner of the invention, the first added module 44 only comprises one compartment (not shown) supplied by a single first inlet nozzle 26.

[0041] The second added module, in the same way, generally comprises at least one second compartment similar to the compartment 30 previously described and where the associated washing liquid inlet nozzles 32 are located. In Figures 4 to 6, in a non-limiting manner of the invention, the second added module 46 only comprises one compartment (not shown) supplied by a second single inlet nozzle 32.

[0042] Of course, it will be understood that the configuration of Figures 4 to 6 is not limiting of the invention, and that each of the first modules 44 or second module 46 could comprise more than one compartment and as many associated inlet nozzles. This configuration makes it possible to simplify the manufacture of the ramp 18, by firstly molding the body 42 with all the outlet nozzles 28, 34 and by mounting therein the added modules 44, 46 also produced by molding.

[0043] The washing ramp 18 according to the invention is of particular interest within the framework of a washing system 48 allowing independent supply of the washing liquid compartments.

[0044] As illustrated in Figures 3 to 8, the invention therefore also relates to a washing system 48 comprising at least one reservoir 50 of washing liquid, at least one pump 52, 54 of washing liquid supplied by this at least one reservoir 50, a washing ramp 18 as described previously, and means 56 for directing the washing liquid capable of selectively directing the washing liquid pumped by the pump(s) 52, 54 towards one or more of the at least one first washing liquid inlet nozzle 24 and at least one second washing liquid inlet nozzle 26 selected.

[0045] Several options can be considered to practically implement the means 56 for directing the washing liquid.

[0046] According to a first embodiment of the washing system 48 which has been shown in figures 3 and 4, the washing system 48 is provided with washing liquid orientation means 56 which comprise at least one solenoid valve 58. This solenoid valve 58 comprises an inlet 60 connected to a single outlet 62 of the pump 52. The solenoid valve 58 also comprises two outlets 64, each of the outlets 64 supplying only one of the inlet nozzles 26, 32.

[0047] On the, the first embodiment of the washing system 48 is associated with the first embodiment of the ramp 18. The solenoid valve 58 is produced in the form of a ramp 66 comprising two electrically controlled valves 69.

[0048] On the, the first embodiment of the washing system 48 is associated with the second embodiment of the ramp 18. The solenoid valve 58 is a three-way solenoid valve, comprising an inlet 60 and two outlets 64.

[0049] Illustrates a second embodiment of the washing system 48 comprising a plurality of pumps 52, 54 with a single outlet 62 supplied by at least one reservoir 50. In the embodiment of the invention which has been shown here, the washing system 48 comprises two pumps 52, 54 supplied by the same reservoir 50. The outlet 62 of each pump 52, 54 is connected directly to only one of the inlet nozzles 26, 32.

[0050] In this case, the means 56 for directing the washing liquid are electronic means arranged upstream of the pumps 52, 54 and more particularly comprise control means 65 such as a power supply unit capable of selectively activating each pump 52, 54 with a single outlet.

[0051] Illustrates a third embodiment of the washing system 48 comprising at least one pump 52 with two outlets 62 discharging alternately into one or the other of these two outlets 62 depending on a direction of rotation of the pump 52. Each outlet 62 of the pump is directly connected to a single inlet nozzle 26, 32. As previously, the washing liquid orientation means 56 are electronic means arranged upstream of the pump 52 and more particularly comprise control means 65 such as a power supply unit capable of supplying the pump 52 with two opposite voltages so as to simultaneously activate it and control its direction of rotation.

[0052] Illustrates a fourth embodiment of the washing system 48 in which the washing liquid directing means comprise a solenoid valve 58 and furthermore at least one hydraulic switch 66. In the same manner as previously, the pump 52 is supplied by a reservoir 50. The solenoid valve 58 comprises an inlet 60 connected to a single outlet 62 of the pump 52. The solenoid valve 58 in this embodiment only comprises one outlet 64 which is connected to an inlet 68 of the hydraulic switch 66. The hydraulic switch comprises two outlets 70, 72 which are each connected directly to only one of the inlet nozzles 26, 28.

[0053] The hydraulic switch 66 could be controlled in various ways, for example electronically and in this case it would be very close in its operating principle to a solenoid valve. However, in this embodiment of the invention, the hydraulic switch 66 is a mechanically controlled switch whose switching between its two outputs 70, 72 is controlled by the pressure of the washing liquid received by its inlet 68. This hydraulic switch 66 is associated with the pump 52 which has the particularity of being a pressure-controlled single-outlet pump.

[0054] The pump 52 is in fact capable of delivering washing liquid at two different pressures. When the solenoid valve 58 is open, the hydraulic switch receives a pressure of washing liquid. In the case where this pressure is reduced, the hydraulic switch 66 allows the passage of the washing liquid through the outlet 70, and in the case where this pressure is high the hydraulic switch allows the passage of the washing liquid towards its outlet 72.

[0055] Illustrates a fifth embodiment of the washing system according to the invention combining the first and fourth embodiments of the washing system according to the invention. It comprises a reservoir 50 supplying a pressure-controlled pump 52, one outlet 52 of which supplies the inlet 60 of a solenoid valve 58 with two electrically controlled valves 69. One valve 69 has its outlet 64 which is directly connected to an inlet nozzle 26 of the ramp 18, and the other valve 69 has its outlet 64 which is connected to the inlet 68 of the hydraulic switch 66 whose low pressure 70 and high pressure 72 outlets make it possible to selectively supply the inlet nozzles 38 or 32 of the ramp 18. This makes it possible to advantageously supply ramp 18 comprising three washing liquid compartments 24, 30, 36. In a very simple manner and by means of suitable control logic, it is possible to authorize the passage of the washing liquid through one or other of the valves 69.

[0056] When the valve 69 which is connected to the inlet 26 of the washing compartment 24 is supplied, the washing liquid directly supplies this washing compartment 24.

[0057] When the valve 69 which is connected to the inlet 68 of the hydraulic switch 66 is supplied the washing liquid supplies the hydraulic switch 66 and it is the pressure supplied by the pump 52 which determines by which of the outlets 70, 72 of the hydraulic switch the washing liquid is directed towards one or other of the inlet nozzles 32, 38 of the ramp 18 associated with the compartment 30, 36.

[0058] The invention therefore advantageously makes it possible to selectively discharge washing liquid through the various outlet nozzles of a washing ramp 18.

[0059] Thus, a method for controlling the washing system 58 comprises at least the steps of:

[0060] i) operating the pump 52 by directing the washing liquid towards the first inlet nozzle 26 determined with the means 56 for directing the washing liquid,

[0061] ii) operating the pump 52 by directing the washing liquid towards at least the second nozzle 32 determined with the washing liquid directing means 56.

[0062] On a larger scale, this configuration is of particular interest in the context of cleaning an assembly 10 of an optical sensor of a motor vehicle of the LIDAR type, comprising, for example, a large glazed surface 16 which has been shown in the figure. Indeed, in this case the glazed surface 16 corresponds to a field of vision of the sensor segmented into a plurality of zones, for example, here, zones A, B, C, D, E, F, G, H, I, J. Each of these zones corresponds to a nozzle of the ramp 18 as described previously. The ramp 18 can be selectively controlled to spray the corresponding zone. The LIDAR system also makes it possible to determine which zone of the field of vision among the zones, A, B, C, D, E, F, G, H, I, J, is dirty.A method for controlling a leader-type washing system 58 comprises a first step during which the sensor determines which of the zones A, B, C, D, E, F, G, H, I, J is soiled, then a second step during which the system operates the pump 52 by directing the washing liquid towards the nozzle which is associated with the nozzle opposite the soiled zone with the means 56 for directing the washing liquid.

[0063] The invention advantageously makes it possible to benefit from a washing system that is economical in washing liquid and can use, in certain cases, low-pressure, low-flow washing pumps that are completely standard and at a reduced cost.

Claims

Washing ramp (18) for an optical sensor of a motor vehicle, comprising: a first washing liquid compartment (24), at least one first washing liquid inlet nozzle (26) and at least one first washing liquid outlet nozzle (28) which all communicate with said first compartment (24), said ramp (18) comprising at least one second washing liquid compartment (30), as well as at least one second washing liquid inlet nozzle (32) and at least one second washing liquid outlet nozzle (34) all communicating with the at least one second compartment (30), and hydraulically independent of the first compartment (24), of the at least one first washing liquid inlet nozzle (26) and of the at least one first washing liquid outlet nozzle (28). Washing ramp (18) according to the preceding claim, comprising a single-piece body (42) comprising at least one first washing liquid outlet nozzle (28) and at least one second washing liquid outlet nozzle (34), said single-piece body (42) also comprising the first compartment (24) and its at least one first washing liquid inlet nozzle (26) and the at least one second compartment (30) and its at least one second washing liquid inlet nozzle (32), all made in one piece with said body (42). Washing ramp (18) according to claim 1, comprising a single-piece body (42) comprising at least one first washing liquid outlet nozzle (28) and at least one second washing liquid outlet nozzle (32), in which:said single-piece body (42) receives a first added module (44) and at least one second added module (46),the first added module (44) comprises at least one first compartment and the associated washing liquid inlet nozzle(s) (26) and the second added module (46) comprises at least one second compartment and the associated washing liquid inlet nozzle(s) (32).each compartment communicates with at least one of the nozzles (28, 34) of the single-piece body (42). Washing system (48) comprising at least:- a reservoir (50) of washing liquid,- at least one pump (52, 54) of washing liquid supplied by said at least one reservoir (50),- a washing ramp (18) according to one of claims 1 to 3, and- means (56) for directing the washing liquid capable of selectively directing the pumped washing liquid towards one or more of the at least one first washing liquid inlet nozzle (24) and at least one second washing liquid inlet nozzle (26) selected. Washing system (48) according to the preceding claim, wherein:the washing system (48) comprises a plurality of pumps (52, 54) with a single outlet (62) supplied by said at least one reservoir (50),the outlet (62) of each pump is connected directly to only one of the inlet nozzles (24, 26),the means (56) for directing washing liquid comprise control means (65) capable of selectively activating each pump (52, 54) of said plurality of pumps with a single outlet (62). Washing system (58) according to claim 4, wherein:the washing system (58) comprises at least one pump (52) with two outlets (62) delivering alternately depending on a direction of rotation of the pump (52),each outlet (62) of the pump (52) is connected directly to a single inlet nozzle (24, 26),the means (56) for directing the washing liquid comprise control means (65) capable of activating the at least one pump (52) with two outlets (62) and controlling its direction of rotation. Washing system (58) according to claim 4, wherein:the means (56) for directing washing liquid comprise at least one solenoid valve (58),the at least one solenoid valve (58) has an inlet (60) and two outlets (64),the inlet (60) of the at least one solenoid valve is connected to an outlet (62) of a pump (52), and said pump (52) has a single outlet,each outlet (64) of the at least one solenoid valve supplies only one of the inlet nozzles (26, 32). Washing system (58) according to the preceding claim, in which: the washing liquid orientation means (56) further comprise at least one hydraulic switch (66), an inlet (68) of said at least one hydraulic switch (66) is connected to an outlet of at least one solenoid valve (58), each outlet (70, 72) of the at least one switch is connected directly to only one of the inlet nozzles. Washing system (58) according to the preceding claim, in which:the single-outlet pump (52) is a pressure-controlled pump,the hydraulic switch (66) is a mechanically controlled switch whose switching between its two outputs (70, 72) is controlled by the pressure of the washing liquid received by its inlet (68). Assembly (10) of an optical sensor for a motor vehicle of the LIDAR type, comprising: a LIDAR type sensor comprising a field of vision segmented into a plurality of zones (A, B, C, D, E, F, G, H, I, J). a washing system (58) according to one of claims 1 to 9, in which each outlet nozzle (28, 34) of the ramp is arranged opposite one of the zones (A, B, C, D, E, F, G, H, I, J).

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