Hydraulic unit and solenoid valve assembly for a motor vehicle

Abstract

The invention relates to a hydraulic unit (10) comprising a housing (13), a solenoid valve comprising an electrical part (11) housed in the housing (13) and a hydraulic part (12) comprising an outlet sleeve (15) located at a lower end of the housing (13), coupling members (16) for coupling to a second hydraulic unit (10), and an electrical connection member (17) for connecting the electrical part (11) of the solenoid valve to an electrical network. According to the invention, the housing (13) comprises an overmoulding for the electrical connection member (17) and has a mechanical coupling interface (18) for coupling to a support for the hydraulic unit (10), the dimensions and shapes of the mechanical coupling interface (18) having tolerances of less than 50 µm in order to ensure reproducible assembly of the hydraulic unit (10).

Description

HYDRAULIC BLOCK AND SOLENOID VALVE ASSEMBLY FOR MOTOR VEHICLES

[0001] The technical context of the present invention is that of hydraulic cleaning systems onboard motor vehicles which allow the cleaning of specific surfaces located in relation to sensors.

[0002] More particularly, the invention relates to a hydraulic block housing a solenoid valve, to an assembly of solenoid valves comprising several hydraulic blocks and to a cleaning system comprising such an assembly. State of the art

[0003] Modern motor vehicles now incorporate a wide range of equipment designed to improve driver and passenger safety by enhancing the detection and perception of the road ahead and around the vehicle. For example, equipment with one or more sensors, such as radar or reversing cameras, is commonly used.

[0004] To ensure the continued proper functioning of these sensors, cleaning systems have also been implemented. These cleaning systems typically include a distribution and spraying system for a cleaning fluid intended for the maintenance of the sensors and their adjacent glass surfaces. Depending on the application, this cleaning fluid could be a solvent such as water or methanol, with or without detergent, a gas such as compressed air, or a mixture of one or more of these substances. However, for simplicity, only the term "cleaning fluid" is used in this document, which should be interpreted as encompassing all these possibilities. This distribution system is controlled by solenoid valves which, connected to an electronic control circuit, open or close accordingly to supply a spray nozzle associated with one of the sensors to be cleaned.

[0005] However, as the number of sensors to be cleaned within a motor vehicle is constantly increasing due to the evolution of automotive technology, this leads to an increase in the number and / or complexity of cleaning fluid distribution systems, pressure sources and / or solenoid valves responsible for supplying fluidic conduits that channel the cleaning fluid to the sensors.

[0006] The multiplicity of sensors and the increasing complexity of associated cleaning systems and the distribution system lead to numerous problems on motor vehicles, among which we can mention bulkiness, i.e. the difficulty of housing such cleaning systems or of passing the fluid conduits of the distribution system in an already very constrained environment.

[0007] Another known problem is the increased weight of vehicles due to the proliferation of fluid lines and solenoid valves. Finally, another well-known issue is, of course, the rising production costs.

[0008] To solve this technical problem, a known solution is to use several blocks of solenoid valves connected to each other and mounted on a single support. These blocks are all connected to a single cleaning fluid reservoir via a single fluid line. Downstream of this system, each solenoid valve is fluid-connected to one or more cleaning systems to control the cleaning of one or more associated sensors. Thus, such known solenoid valve assemblies reduce the required size and generate significant design and manufacturing cost savings, facilitating their integration into motor vehicles.

[0009] Generally, such solenoid valve assemblies comprise a plurality of solenoid valves, each consisting of an electrical component housed in a casing and a hydraulic component with an outlet sleeve located at the lower end of the casing. In other words, such known solenoid valve assemblies combine and link several hydraulic blocks of solenoid valves together, thus forming a sub-assembly dedicated to the function of distributing the cleaning fluid.

[0010] Many solenoid valve assemblies are known, each grouping several hydraulic blocks together. Such assemblies are generally connected to one another at their supply line, with each supply line of one hydraulic block being inserted into the distribution line of the directly adjacent hydraulic block to form a chain of hydraulic blocks, all connected at their supply line. The drawback of such solenoid valve assemblies lies in the unreliability of these connections. Under the hydraulic pressure of the cleaning fluid flowing through the distribution line, two adjacent hydraulic blocks can become detached, as their supply lines can become disconnected.

[0011] We are also familiar with the redundant and statically indeterminate implementation of additional fixings on the housings of each solenoid valve, in order to stiffen the entire solenoid valve assembly and prevent two hydraulic blocks from separating. This solution is unfortunately costly because it requires more precise dimensioning and machining of the parts, and it also complicates the assembly of such solenoid valve assemblies.

[0012] Furthermore, from an electrical point of view, the interconnection of each hydraulic block with its support and the associated electrical network is not simple, because the machining and manufacturing tolerances of the different parts forming these hydraulic blocks lead to misalignment defects which sometimes make the assembly of all the solenoid valves to their single support difficult or even impossible.

[0013] These various situations are not desirable.

[0014] The present invention aims to provide a new hydraulic block to address at least largely the previous problems and to lead to other advantages.

[0015] Another objective of the invention is to facilitate and improve the fixing of two adjacent hydraulic blocks to each other.

[0016] Another objective of the invention is to facilitate the electrical connection of a hydraulic unit with the on-board network of the motor vehicle in which it is integrated.

[0017] Another objective of the invention is to reduce the risks of detachment of two adjacent hydraulic blocks, while offering an easy and economical mounting solution.

[0018] According to a first aspect of the invention, at least one of the aforementioned objectives is achieved with a hydraulic block comprising: a housing; a solenoid valve comprising an electrical part housed in the housing and a hydraulic part comprising an outlet sleeve located at a lower end of the housing; coupling elements with a second hydraulic block, the coupling elements comprising first coupling elements associated with a first end of the supply conduit, and second coupling elements associated with a second end of the supply conduit; an electrical connection element enabling the electrical part of the solenoid valve to be connected to an electrical network.

[0019] According to the invention, the housing includes an overmolding of the electrical connection element and features a mechanical coupling interface with a support for the hydraulic block.

[0020] In the context of the present invention, a solenoid valve is an electrically controlled hydraulic valve that allows control of the fluid flow rate at its outlet sleeve. Thus, the solenoid valve allows setting an outlet flow rate measured at the outlet sleeve, ranging from a minimum value, ideally zero, to a maximum value. The outlet flow rate can be finely adjusted to any value between the minimum and maximum flow rates.

[0021] In the context of the present invention, the outlet sleeve forms a connector – male or female – intended to be fluidically coupled to a fluidic conduit located downstream of the hydraulic block conforming to the first aspect of the invention in order to allow a supply of cleaning fluid for one or more cleaning systems located downstream of said hydraulic block.

[0022] In the context of the present invention, the electrical part of the solenoid valve includes an electromagnetic circuit for controlling the opening or closing of the hydraulic part, so as to control the output flow at the outlet sleeve.

[0023] In the context of the present invention, the hydraulic portion allows for fluidic communication or fluidic isolation of an upstream portion of the solenoid valve, typically the supply line, with a downstream portion of the solenoid valve, typically the fluidic line intended to be connected to the outlet sleeve. The hydraulic portion includes, for example, a movable piston within the body of the solenoid valve that allows for closing an opening to or away from the outlet sleeve.

[0024] In the context of the present invention, the housing contains the electromagnet. The housing is advantageously made of plastic and obtained by molding. The housing optionally includes anchoring or fastening means for attaching it to other housings located nearby in order to form a series of solenoid valves. The housing thus protects the electromagnet.

[0025] In the context of the present invention, the cleaning fluid supply line is located upstream of the solenoid valves and is intended to be fluidly connected to a cleaning fluid reservoir. The supply line of a first hydraulic block is intended to be fluidly coupled to the supply line of a second hydraulic block. Generally, the supply line of a given solenoid valve is integral with the hydraulic portion of the solenoid valve, and / or forms at least part of said hydraulic portion. The supply line may be formed from the same material as the hydraulic portion of a solenoid valve, or attached to and fixed to said hydraulic portion.

[0026] In the context of the present invention, coupling elements allow the first hydraulic block to be assembled with the second hydraulic block by connecting them at their supply lines. More specifically, the coupling elements allow the supply line of the first hydraulic block to be partially inserted into the supply line of the second hydraulic block. The supply lines are preferably coupled by a push-fit connection. Thus, the two distribution lines, inserted one inside the other, together form a single supply line for both assembled hydraulic blocks.

[0027] Thus, the hydraulic block conforming to the first aspect of the invention ensures better attachment to an adjacent hydraulic block, guaranteeing optimal operation and ease of implementation. Indeed, the mechanical coupling interface facilitates both mechanical and electrical interaction between the housing and the support on which the hydraulic block is intended to be mounted. More complete integration of the electrical connection element and improved control of the shapes and dimensions at the mechanical coupling interface allow for better prediction of the relative position of each electrical connection element and, ultimately, better prediction of the relative position of the hydraulic block with respect to its support.

[0028] The hydraulic block conforming to the first aspect of the invention advantageously comprises at least one of the following improvements, the technical characteristics constituting these improvements being able to be considered alone or in combination: the housing comprises an overmolding of both the hydraulic and electrical parts of the hydraulic block. This advantageous configuration allows for better control of the dimensions of the hydraulic block and enables improved relative positioning of two adjacent hydraulic blocks when mounted on a support. In particular, this advantageous configuration avoids problems of over-constraint in both the hydraulic and electrical parts; the housing is made of a material containing plastic. The housing is advantageously obtained by molding.This configuration advantageously reduces production costs while ensuring good tolerances for the housing dimensions, necessary for controlling the housing dimensions and for the proper assembly of the hydraulic block according to the invention on a support or for its coupling with another hydraulic block, as well as low variation in the dimensions of the hydraulic blocks thus manufactured by molding over time; the housing is monolithic. In other words, the housing is formed from a single piece produced by a single manufacturing process to guarantee its dimensions and shape; the mechanical coupling interface is configured to provide isostatic coupling of the hydraulic block with the support.In particular, the mechanical coupling interface is configured to allow isostatic coupling of the electrical part of the hydraulic unit, and specifically its electrical connection element, with the onboard network to which the hydraulic unit is intended to be coupled, and / or the mechanical coupling interface is configured to allow isostatic coupling of the hydraulic part of the hydraulic unit, and specifically the first and second hydraulic coupling elements, with a supply line allowing the circulation of a cleaning fluid; at the electrical level, the mechanical coupling interface has at least one bearing surface against the support. This bearing surface acts as a reference surface for aligning the hydraulic unit and its support for the aforementioned mechanical coupling purposes.This advantageous configuration allows for reproducible coupling and thus facilitates the assembly of an electrical block within a set of solenoid valves comprising several hydraulic blocks. In the electrical section, the mechanical coupling interface includes a plate from which at least one electrical connection pin extends; this pin constitutes the electrical connection element. According to a first embodiment, in the hydraulic section, the housing forms an overmolding of the outlet sleeve. This overmolding has at least one reference face used for mechanical coupling with the hydraulic section of another hydraulic block and / or with a fluidic conduit.The reference face here takes the form of a face whose shape and dimensions are adjusted, for example, with tighter tolerances than other parts of the hydraulic block. For example, at least one reference face is obtained with dimensional tolerances of less than 50 µm. According to a second embodiment, at the lower end of the hydraulic section, the outlet sleeve is coupled to the housing by retaining means. In particular, the housing includes, for example, fixing clips that work in conjunction with additional clips on the outlet sleeve. This advantageous configuration allows for easy coupling of the outlet sleeve to the housing, and the precise control of the housing's dimensions and shape enables accurate placement of the outlet sleeve, ultimately facilitating a simpler connection to the fluid line.The outlet sleeve incorporates a piston that moves in translation within the hydraulic section of the hydraulic block. This piston opens or closes the hydraulic block, thus fluidly coupling or isolating the hydraulic section of the block from the fluidic conduit to which the block is connected. In other words, the outlet sleeve houses the piston of the hydraulic section of the hydraulic block. This advantageous configuration is made possible by the precise dimensions of the housing, which allow for optimal placement of the outlet sleeve and, ultimately, the installation of the piston from the outlet sleeve into the housing. This configuration is particularly advantageous because it facilitates piston installation and simplifies the design of the hydraulic block, thereby reducing manufacturing costs.

[0029] According to a second aspect of the invention, a set of solenoid valves is proposed for a sensor cleaning system of a motor vehicle, the set comprising a plurality of hydraulic blocks conforming to the first aspect of the invention or to any one of its improvements, each hydraulic block being coupled to the other through its coupling members.

[0030] Preferably, all hydraulic blocks are connected in pairs via their supply lines, with all supply lines together forming a single supply line. In other words, the hydraulic blocks are all fluidly coupled in series with each other.

[0031] According to a third aspect of the invention, a cleaning system for motor vehicles is proposed, the cleaning system comprising: the set of solenoid valves conforming to the second aspect of the invention or to any one of its improvements; a support to which each hydraulic block is fixed securely via its mechanical coupling interface, each hydraulic block being electrically connected to an electrical network of the motor vehicle via its electrical connection element; a plurality of cleaning devices, each cleaning device being associated with a sensor of the motor vehicle; a plurality of fluidic conduits fluidly coupling the cleaning devices to the set of solenoid valves.

[0032] In particular, each cleaning device is fluidically coupled to one of the solenoid valves in the assembly. For this purpose, each fluidic conduit is coupled, at one end, to the outlet sleeve of one of the solenoid valves and, at the other end, to the cleaning device.

[0033] In the context of the present invention, the cleaning device comprises at least one nozzle for spraying a cleaning fluid onto a surface to be cleaned on the sensor to which it is associated. The cleaning fluid is conveyed to the cleaning device via the fluidic conduit. Controlling the solenoid valve assembly thus allows for selective control of the flow of cleaning fluid in each fluidic conduit, enabling the selective activation of each cleaning device using a single set of solenoid valves according to the second aspect of the invention.

[0034] The cleaning system according to the third aspect of the invention advantageously includes a storage tank for the cleaning fluid. The storage tank is fluidly coupled to the supply line of the solenoid valve assembly. Subsequently, the control of each solenoid valve directs the cleaning fluid circulating in the supply line to the active cleaning device(s).

[0035] Various embodiments of the invention are envisaged, incorporating, according to all their possible combinations, the different optional features described herein. Brief description of the figures

[0036] Other features and advantages of the invention will become apparent from the following description on the one hand, and from several examples of embodiments given by way of indication and not limitation with reference to the attached schematic drawings on the other hand, on which: illustrates a three-dimensional view of an example embodiment of a hydraulic block conforming to the first aspect of the invention; illustrates a side section view of the hydraulic block illustrated on the; illustrates a schematic view of an example embodiment of a set of solenoid valves conforming to the second aspect of the invention and whose hydraulic blocks are mounted on a common support. Detailed description

[0037] Of course, the features, variants, and different embodiments of the invention can be combined in various ways, provided they are not incompatible or mutually exclusive. In particular, variants of the invention may include only a selection of features, described hereafter in isolation from the other described features, if this selection of features is sufficient to confer a technical advantage or to differentiate the invention from prior art.

[0038] In particular, all the variants and embodiments described can be combined with each other if there are no technical obstacles to this combination.

[0039] In the figures, elements common to several figures retain the same reference.

[0040] With reference to Figures 1 to 3, the invention relates more particularly to hydraulic blocks 10 such as those found in solenoid valve assemblies 1 of cleaning systems for motor vehicles. Such cleaning systems are associated with one or more sensors in order to clean a sensing surface to ensure optimal sensor operation. Such cleaning systems comprise: a solenoid valve assembly 1; a support 2 to which each hydraulic block 10 is rigidly fixed via its mechanical coupling interface 18, each hydraulic block 10 being electrically connected to an electrical network of the motor vehicle via its electrical connection member 17; a plurality of cleaning devices, each cleaning device being associated with a sensor of the motor vehicle; a plurality of fluidic conduits fluidly coupling each cleaning device to the solenoid valve assembly 1.

[0041] In particular, each hydraulic block 10 is fluidically coupled to the fluidic conduit via its fluidic part and its outlet sleeve 15.

[0042] In the context of the present invention, each cleaning device comprises at least one nozzle for spraying a cleaning fluid onto the sensing surface of the sensor to which it is associated. The cleaning fluid is conveyed from the solenoid valve assembly 1 to each cleaning device via fluid lines. Conversely, in a preferred but non-limiting embodiment of the invention, the solenoid valve assembly 1 is fluidically connected to a cleaning fluid reservoir via a single fluid line, thus reducing costs and simplifying the integration of such a cleaning system on a motor vehicle.

[0043] Consequently, the control of the set of solenoid valves 1 allows for the selective control of a flow of cleaning fluid in each fluidic conduit, allowing each cleaning device to be selectively activated using a single set of solenoid valves 1.

[0044] The solenoid valve assembly 1 comprises several hydraulic blocks 10 linked to each other, each hydraulic block 10 being coupled to the other through coupling elements 16.

[0045] The hydraulic blocks 10 are connected to the distribution conduits, represented here in a purely abstract and non-limiting manner by the fluidic distribution system 3. The fluidic distribution system 3 may comprise discrete distribution conduits, connecting the outlet sleeve 15 of each of the hydraulic blocks 10 to a corresponding outlet such as a spray nozzle (not shown). Such a system is advantageous in that, by selectively operating the hydraulic blocks, surfaces or elements associated with at least one hydraulic block 10 can be selectively sprayed, such as, for example, but not limited to, glass surfaces, cameras, sensors, and / or emitters.

[0046] This association may be strictly exclusive, meaning that the fluid distribution system connects each hydraulic block 1 to a single outlet. Alternatively, the outputs of at least some of the hydraulic blocks 10 may be shared to a single outlet, depending on the needs of the implementation in question.

[0047] Furthermore, by means of the coupling elements 16, the fluid inlets of the hydraulic blocks 10 are connected. This allows all the hydraulic blocks 10 of the assembly 10 to be supplied by a single reservoir and pump (not shown).

[0048] Furthermore, the hydraulic blocks 10 are all fixed to the same support 2, shown schematically in the figure. The support 2 can be of any type, and, in particular, it includes a fixing rail to which each hydraulic block 10 is fixed, via its mechanical coupling interface 18.

[0049] With reference to FIGURES 1 and 2, each hydraulic block 10 of the solenoid valve assembly 1 comprises: a housing 13; a solenoid valve having an electrical part 11 housed in the housing 13 and a hydraulic part 12 having an outlet sleeve 15 located at the lower end of the housing 13; a fluid distribution system 3 located at the lower end of the housing 13, the fluid distribution system 3 being in fluidic communication with a body of the solenoid valve and with the outlet sleeve 15.The hydraulic part 12 houses in particular a piston 121 which allows, depending on its folded or extended configuration, to respectively put the hydraulic part 12 of the hydraulic block 10 into fluidic communication with the fluidic conduit or to isolate said hydraulic part 12 from said fluidic conduit; coupling elements 16 with a second hydraulic block 10, the coupling elements 16 comprising first coupling elements 16 associated with a first end of a supply conduit 4, and second coupling elements 16 associated with a second end of a supply conduit 4. the coupling elements 16 allow to connect fluidly the hydraulic part 12 of two adjacent hydraulic blocks 10; an electrical connection element 17 allowing to connect the electrical part 11 of the solenoid valve to an electrical network.

[0050] In order to allow more precise positioning and simplified assembly of the different hydraulic blocks 10 on their support 2, leading to better reproducibility of the assembly of each hydraulic block 10, the housing 13 includes an overmolding of the electrical connection element 17 and presents a mechanical coupling interface 18 with a support 2 for the hydraulic block 10.

[0051] The housing 13 is advantageously made of a plastic material and is obtained by molding. In order to allow for easier and more reproducible assembly of the hydraulic blocks 10 of a set of solenoid valves 1, the housing 13 now includes an overmolding of the hydraulic part 12 and the electrical part 11 of a given hydraulic block 10, so that the dimensions and shapes of the housing 13 are better controlled. Thus, the housing 13, and in particular its mechanical coupling interface 18, makes it possible to present one or more reference surfaces used for positioning and supporting a hydraulic block 10 against the support 2 and / or against another hydraulic block 10.

[0052] In particular, at the electrical connection member 17, the mechanical coupling interface 18 comprises a rectangular plate 182 with a flat bearing surface 183. This bearing surface 183 is intended to be affixed against the support 2 to which the hydraulic block 10 is fixed. To facilitate the electrical connection of the electrical connection member 17, via its electrical pins 171, to an electrical connection device 22 associated with the support 2 and schematically visible in the figure, the electrical connection interface comprises, at the plate 182, a fixing hole 181 allowing a predetermined position to be fixed for the hydraulic block 10 on the corresponding support 2, via a mechanical coupling device 21 complementary to the mechanical coupling interface 18.Thus, the mechanical coupling device 21 of the support 2 and the mechanical coupling interface 18 of the hydraulic block 10 collaborate together by association of complementary shapes.

[0053] Preferably, the mechanical coupling interface 18 is configured to compensate for the hyperstaticity of the assembly of the hydraulic block 10 on its support 2, particularly during its electrical connection via its electrical connection element 17. More specifically, the mechanical coupling interface 18 collaborates with the mechanical coupling device 21 in order to provide an isostatic coupling which eliminates mechanical redundancies between the different contact faces of the hydraulic block 10 on its support 2.

[0054] Thus, the position, shape, and dimensions of the plate 182 forming the mechanical coupling interface 18 are obtained in a precisely fitted manner; that is, the associated dimensions and manufacturing processes are dimensioned to ensure excellent control of said shapes and dimensions of the plate 182, for example. By way of non-limiting example, the tolerance associated with these elements is less than 100 µm, preferably less than 50 µm, and preferably even less than 10 µm.

[0055] As shown in Figures 1 and 2, the hydraulic block 10 includes axial retaining elements 14 configured to hold the first hydraulic block 10 against the second hydraulic block 10 when they are connected to each other via their coupling members 16. The axial retaining elements 14 work with the coupling members 16 to establish a fluid connection between the two adjacent hydraulic blocks 10. The axial retaining elements 14 prevent the first hydraulic block 10 from detaching uncontrollably from the second hydraulic block 10.

[0056] The axial retaining elements 14 comprise: retaining clips extending from the first end of the supply conduit 4, relative to the axis of elongation. At one free end, the retaining clips have one or more prongs forming a lip that projects from each prong on the side of the supply conduit 4; and additional receivers for the retaining clips, the additional receivers being associated with the second end of the supply conduit 4. In particular, the additional receivers are configured to accommodate the prongs of each retaining clip, either to create a recess or to house them. The additional receivers typically take the form of openings formed on a lateral edge of the supply conduit 4.

[0057] The axial retaining elements 14 are configured to work together in a complementary form engagement. In particular, when assembling the first hydraulic block 10 with the second hydraulic block 10, the retaining clips of the first hydraulic block 10 are configured to be elastically deformed in order to engage with the complementary receivers located opposite each other on the second hydraulic block 10. Once engaged in the complementary receivers, the retaining clips prevent the first hydraulic block 10 from being unintentionally separated from the second hydraulic block 10.

[0058] As can be seen in FIGURES 1 and 2, the retaining clips extend on either side of the feed conduit 4, relative to the elongation axis, so that a free end of each retaining clip, and in particular the one with the claws, extends axially beyond the feed conduit 4, relative to the elongation axis.

[0059] Advantageously, the axial retaining elements 14 comprise two retaining clips located diametrically opposite each other with respect to the supply conduit 4, and two complementary receivers located diametrically opposite each other with respect to the supply conduit 4.

[0060] At its lower end, the housing 13 of the hydraulic block 10 interacts with the outlet sleeve 15. In the embodiment illustrated in FIGURES 1 and 2, the outlet sleeve 15 is attached and fixed securely to the housing 13 by means of retaining means 151. The retaining means include, for example, fixing clips that interact with additional clips provided on the housing 13. Thus, precise control of the dimensions and shape of the housing 13 allows for the accurate location of the mechanical coupling interface 18 that connects the outlet sleeve 15 to the housing 13. Consequently, the relative positioning of each hydraulic block 10 with respect to the fluid conduit to which it is connected via its outlet sleeve 15 is better controlled, leading to easier and more reproducible assembly with the opposing coupling elements 31.

[0061] In summary, the invention relates to a hydraulic block 10 comprising a housing 13, a solenoid valve comprising an electrical part 11 housed in the housing 13 and a hydraulic part 12 comprising an outlet sleeve 15 located at the lower end of the housing 13, a fluidic distribution system 3 located at the lower end of the housing 13, the fluidic distribution system 3 being in fluidic communication with a body of the solenoid valve and with the outlet sleeve 15, coupling elements 16 with a second hydraulic block 10, an electrical connection element 17 allowing the electrical part 11 of the solenoid valve to be connected to an electrical network.According to the invention, the housing 13 includes an overmolding of the electrical connection element 17 and has a mechanical coupling interface 18 with a support 2 for the hydraulic block 10, dimensions and shapes of the mechanical coupling interface 18 having tolerances of less than 50µm in order to guarantee a reproducible assembly of the hydraulic block 10.

[0062] Of course, the invention is not limited to the examples just described, and many modifications can be made to these examples without departing from the scope of the invention. In particular, the various features, forms, variants, and embodiments of the invention can be combined in various ways, provided they are not incompatible or mutually exclusive. This applies especially to all variants.

Claims

Hydraulic block (10) comprising: a housing (13); a solenoid valve comprising an electrical part (11) housed in the housing (13) and a hydraulic part (12) comprising an outlet sleeve (15) located at a lower end of the housing (13); coupling elements (16) with a second hydraulic block (10), the coupling elements (16) comprising first coupling elements (16) associated with a first end of a supply conduit (4), and second coupling elements (16) associated with a second end of the supply conduit (4); an electrical connection element (17) for connecting the electrical part (11) of the solenoid valve to an electrical network; characterized in that the housing (13) comprises an overmolding of the electrical connection element (17) and has a mechanical coupling interface (18) with a support (2) for the hydraulic block (10). Hydraulic block (10) according to the preceding claim, wherein the mechanical coupling interface (18) is configured to provide isostatic coupling of the hydraulic block (10) with the support (2). Hydraulic block (10) according to the preceding claim, in which, at the level of the electrical part (11), the mechanical coupling interface (18) has at least one bearing face (183) against the support (2). Hydraulic block (10) according to any one of the preceding claims, wherein, at the level of the electrical part (11), at the level of the electrical part (11), the mechanical coupling interface (18) comprises a plate (182) from which extends at least one electrical connection pin (171), the at least one electrical connection pin (171) forming the electrical connection member (17). Hydraulic block (10) according to any one of the preceding claims, wherein the housing (13) comprises an overmolding of both the hydraulic part (12) and the electrical part (11) of the hydraulic block (10). Hydraulic block (10) according to any one of the preceding claims, wherein, at the lower end of the hydraulic part (12), the outlet sleeve (15) is coupled to the housing (13) by retaining means (151). A set of solenoid valves (1) for a sensor cleaning system of a motor vehicle, comprising a plurality of hydraulic blocks (10) according to any one of the preceding claims, each hydraulic block (10) being coupled to another hydraulic block (10) via its coupling members (16). Assembly of solenoid valves (1) according to the preceding claim, in which all the hydraulic blocks (10) are connected two by two through their supply conduits (4), all the supply conduits (4) together forming a single supply conduit. A motor vehicle cleaning system, the cleaning system comprising: the assembly of solenoid valves (1) according to the preceding claim; a support (2) to which each hydraulic block (10) is fixed rigidly via its mechanical coupling interface (18), each hydraulic block (10) being electrically connected to an electrical network of the motor vehicle via its electrical connection element (17); a plurality of cleaning devices, each cleaning device being associated with a sensor of the motor vehicle; a plurality of fluidic conduits fluidly coupling the cleaning devices to the assembly of solenoid valves (1).

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