Method and apparatus for treating a vehicle

Abstract

After washing a vehicle (2) and applying a drying agent to the vehicle (2), the drying agent is first rinsed off and then the vehicle is blown on to dry it. To rinse the vehicle surface completely without leaving any residue, the liquid used for rinsing is applied to the vehicle (2) as a continuous, continuous jet (12, 27) extending from an outlet (10, 26) to the vehicle (2).

Description

Technical area

[0001] The present invention relates to a method and a device for after-treating a vehicle following a vehicle wash. State of the art

[0002] Cleaning a vehicle in an automatic car wash typically involves a washing step in which dirt is removed from the vehicle using brushes or a pressurized water jet, followed by a drying step in which any residue of the washing fluid adhering to the vehicle is blown off with a strong air stream. To ensure that the vehicle surface is thoroughly wetted with the washing fluid during washing, the latter is often treated with hydrophilizing additives. If these additives remain on the vehicle surface after washing, they promote the widespread distribution of the washing fluid residue over the vehicle surface in a thin layer. Such a layer is difficult to remove by blowing it away, as it offers little resistance to the air stream passing over it, and it promotes the formation of stains if it dries only through evaporation.

[0003] To counteract the formation of stains, it is well known to use chemical drying aids. These are hydrophobic substances that, when distributed on the surface of a vehicle, cause adhering water to condense into droplets. While these are subject to greater shear force from the air flow than a thin film of water, the poor wettability of the hydrophobic surface favors the formation of a small residual droplet where a large droplet has been blown away. When this drops dries, the drying aid deposited on the surface forms a new stain, which is difficult to remove precisely because of its water-repellent properties.

[0004] DE 92 15 261 U1 discloses a vehicle washing device with a spray arm with spray nozzles, via which a cleaning fluid can be sprayed onto the surface of a vehicle to be cleaned. The same spray arm can subsequently also be used to apply a drying aid and demineralized water before drying. If the drying aid is effective, it also forces the sprayed demineralized water to clump together into droplets, which largely roll off the vehicle surface while being sprayed, usually following a path along which a droplet had already run shortly before. Even with prolonged spraying, there is therefore a high probability that residues of water with the drying aid dissolved or emulsified in it will not be rinsed away and will become visible as stains after drying. DE 91 14 923 U1 discloses applying rinse water in a torrent onto a vehicle using a splash pipe.DE 31 08 248 A1 discloses a car wash with a portal for applying a drying aid and a subsequent portal for rinsing the drying aid with demineralized water. Disclosure of the invention

[0005] The object of the invention is to provide a method and a device which, with the same requirements for the design and operation of a blower, enable a faster drying of a vehicle after washing and thereby reduce drying residues.

[0006] This object is achieved, on the one hand, from a process engineering perspective by a method having the features of claim 1 and, on the other hand, with regard to a vehicle treatment system by a device having the features of claim 6. Advantageous further developments are the subject of the respective subclaims.

[0007] In principle, a method according to the invention for treating a vehicle comprises at least the following steps: - Washing the vehicle, - Applying a drying agent to the vehicle, - Rinse off the drying aid, and - Blowing / flowing air onto the vehicle to dry it.

[0008] According to the invention, the liquid used to rinse off the drying aid is applied to the vehicle as a continuous (closed) jet / liquid body extending from the outlet to the vehicle. This meansThe liquid is prevented from breaking up into individual droplets both when it leaves the outlet (primary atomization) and when it hits the vehicle (secondary atomization); the liquid is neither sprayed at the outlet, nor is the jet / liquid body allowed to break up due to gravity on its way from the outlet to the vehicle. Accordingly, the rinsing liquid does not flow onto the vehicle in the form of individual droplets, but rather as a continuous stream that most likely covers the surface of the vehicle (without gaps) at every point, thus ensuring that no droplets containing drying agents or other washing aids remain on the surface. One could also say that the rinsing liquid is applied to the vehicle to be treated as a continuous, continuous stream.Even if small drops of the rinsing fluid remain on the vehicle after blowing off, these will at most contain the non-volatile components that were already present at the time of application. By preferably using a sufficiently low-residue rinsing fluid, such as fresh water, or even better, reverse osmosis water or distilled water, quick and residue-free drying can be achieved.

[0009] Advantageously, the rinsing fluid can be free of surface-active substances such as surfactant residues, which could dissolve drying agents deposited on the vehicle surface. Although the use of treated washer water as a rinsing fluid is not fundamentally excluded, high standards must be placed on its quality.

[0010] According to a further preferred aspect of the invention, the continuous jet can be mixed or foamed with air, thus forming an aerated jet. Such an aerated jet separates upon impact with a surface. Due to the admixed air bubbles, the water can deflect to the side upon impact, and the aerated water jet or foam body disintegrates without secondary atomization, regardless of its angle of incidence.

[0011] To create such an aerated jet, the jet / liquid body can preferably be shaped in a jet regulator (also known as a mixing nozzle or under the brand name Perlator®). In other words, a jet regulator can be arranged at the outlet, which, through its design, avoids primary atomization and aerates the continuous jet, thus also avoiding secondary atomization. In this way, the rinsing fluid can be applied to the vehicle using simple means without atomization. Foaming the jet / liquid body also has the advantage that water consumption can be reduced by approximately half for the same jet volume.

[0012] In an alternative preferred embodiment, the continuous jet can be aerated / foamed using a compressed air foamer. Other foam production methods familiar to those skilled in the art are also contemplated.

[0013] According to a further embodiment of the invention, the cross-section of the contiguous jet / liquid body can be preselected or adjustable depending on the maximum expected distance of the jet or the maximum expected distance between the outlet and the vehicle surface. This is due to the fact that an aerated / foamed jet separates during the fall, which is why the jet should preferably have sufficient volume to contain sufficient air even upon impact from a greater height to reduce secondary atomization. The contiguous jet / liquid body can have a diameter of at least 1 cm, preferably at least 2 cm, more preferably at least 3 cm at its smallest diameter.Additionally or alternatively, the degree of mixing (air content) can also be adjustable depending on the maximum expected distance of the jet or the maximum expected distance between the outlet and the vehicle surface.

[0014] The higher the outlet is located above the vehicle surface impacted by the jet / liquid body, the higher the velocity of the liquid upon impact and the greater the tendency to splash. Accordingly, according to a preferred embodiment, in order to minimize splashing, the outlet can be adjusted to follow the height contour of the vehicle being rinsed, preferably at a predetermined distance, as it is moved over the vehicle to be rinsed. According to an advantageous embodiment, the predetermined distance can be smaller than a theoretically or experimentally determined drop height above which secondary atomization (splashing) occurs for a selected jet / liquid body upon impact with the vehicle surface.

[0015] According to a further aspect, the continuous jet can be designed to be dimensionally stable, ie it can essentially retain its cross-sectional shape when bridging the distance from the outlet to the surface to be treated.

[0016] The fluid body can be a ballistic jet guided along its entire path between the outlet and the vehicle, guided solely by gravity. In other words, by tilting / erecting the outlet above the horizontal, the fluid body can be guided along a gravity-induced parabolic trajectory, while the outlet itself is preferably positioned at or below the level of the vehicle surface to be treated, in order to reduce the effective drop height and thus the kinetic energy upon impact with the vehicle surface.

[0017] Preferably, at least three, or even better, at least four jets / liquid bodies distributed across the width of the vehicle are moved together relative to the vehicle to rinse the entire surface of the vehicle in a single movement without changing direction. In other words, a complete overflow of the vehicle surface can preferably take place in a single movement.

[0018] The applicant has found that the combination of aeration / foaming of the jet with a relatively low drop height or ballistic guidance of the jet produces synergistic effects and particularly low splashes.

[0019] A second aspect of the present invention relates to a vehicle treatment system comprising - a washing facility for washing the vehicle, - an application device for applying a drying aid to the vehicle, - at least one outlet for a rinsing liquid, and - a drying device for drying the vehicle by blowing / flowing, wherein the outlet is designed and arranged such that it forms the rinsing liquid into a jet / liquid body extending continuously and coherently from the outlet to the vehicle.

[0020] According to a preferred alternative, the outlet can have a jet regulator (mixing nozzle / Perlator®) or such a jet regulator can be arranged at the outlet to not only form the jet / liquid body as a continuous jet but also to aerate / foam it. In this way, both primary atomization and secondary atomization can be easily avoided through the design of the outlet or outlet opening. In other words, the outlet can either be designed in such a way per se, or be modified by an attachment, that it permeates the jet / liquid body with air bubbles.

[0021] According to an alternative embodiment, the vehicle treatment system may comprise a compressed air foamer or another foam generator design which is fluidly connected to the outlet in such a way that the rinsing liquid is or can be foamed upon or before discharge.

[0022] According to a further embodiment, the outlet can be configured, in particular controlled by the control device, to change its opening cross-section and / or to open or close various inlet and outlet passages in order to adapt the shape of the jet to the situation. Preferably, the outlet can be configured to shape the jet / liquid body such that its smallest diameter is at least 1 cm, preferably at least 3 cm, particularly preferably at least 6 cm.

[0023] According to a preferred embodiment, the outlet may be height-adjustable to ensure the continuity of the jet / liquid body between the outlet and the vehicle and, in particular, to avoid secondary atomization.

[0024] According to a further preferred embodiment, the vehicle treatment system can have a control device for controlling the outlet. This can be configured, for example, to control the height (the distance from the surface to be treated) and / or the inclination / angle of the outlet and / or the travel speed of the outlet and / or the fluid pressure or the exit speed from the outlet. Advantageously, the vehicle treatment system can additionally have a sensor system for detecting a vehicle's longitudinal profile (a vehicle height contour) and be configured to guide the outlet at a predefined distance above the vehicle's longitudinal profile to avoid secondary atomization.

[0025] According to a preferred embodiment, the liquid body may form a continuous, freely falling jet between the outlet and the vehicle.

[0026] According to a preferred embodiment, the outlet can be directed upwards to guide the liquid body on a ballistic trajectory. Since the drop height essentially determines the impact speed, with such an arrangement the effective drop height of the liquid body can be easily minimized by manipulating the parabolic trajectory (or its apex) to avoid secondary atomization. With such an arrangement, it is further advantageous if at least part of the vehicle surface is higher than the outlet. In other words, the outlet can preferably be arranged or can be arranged at or below an average vehicle surface height. Furthermore, by means of the liquid pressure, the flight height of the liquid can be easily adjusted to the height profile of the vehicle in order to rinse different surface areas of the vehicle with a constant drop height.

[0027] According to a preferred embodiment of the invention, the at least one outlet, more preferably the outlet having a jet regulator or communicating with a compressed air foamer, can additionally be designed and provided to generate (cleaning) foam in a separate treatment step and / or to apply it to a vehicle to be treated.

[0028] In summary, a core concept of the invention is to carry out a rinsing step after an application step in a vehicle treatment process, in which the rinsing liquid is applied without atomization and preferably evenly over the entire surface to be treated in order to enable faster and residue-free drying in the drying air stream. This is achieved by applying the rinsing liquid as a continuously coherent body of liquid or by equipping a vehicle treatment system designed to carry out such a vehicle treatment process with at least one rinsing liquid outlet that is adapted to form a continuously coherent body of liquid under appropriate control of control parameters, such as the water pressure.

[0029] The invention will be explained in more detail below using preferred embodiments with reference to the accompanying figures. The figures are merely schematic in nature and serve exclusively to facilitate understanding of the invention. The same elements are provided with the same reference numerals.

[0030] They show: Fig. 1 shows a vehicle washing system according to a first embodiment of the invention in a perspective view; Fig. 2 a vehicle washing system according to a first embodiment of the invention in a front view; Fig. 3 a schematic longitudinal section through an exemplary distributor for rinsing liquid of the vehicle washing system; Fig. 4 a schematic longitudinal section through a modified distributor; and Fig. 5 shows a vehicle washing system according to a second embodiment of the invention in a front view; and.

[0031] Fig. 1 and Fig. 2 show a gantry car wash as an application example of the invention. A gantry 1 is movable on rails in the longitudinal direction of a vehicle 2 to be washed. The gantry 1 has two columns 3 and a cross member 4 in its basic structure. Various washing brushes 5 are arranged on the gantry, which are shown in the figure for the sake of clarity. Fig. 1 are hidden. The horizontal washing brush 5 is made of the Fig. 5 into a working position in which it follows the height contour while the entire portal 1 moves over the vehicle 2, so that the brushing of the washing brush 5 successively sweeps over the front hood, roof, and tailgate of the vehicle 2. The vehicle treatment system 1 also carries washing brushes 5 that can be rotated about their vertical axis for cleaning the sides of the vehicle 2. The direction in which the washing brushes 5 move along the vehicle 2 during washing can in principle be selected arbitrarily. In the following, it is assumed as an example that they move along the vehicle 2 from the front to the rear.

[0032] The portal 1 also has various other components / treatment devices, for example various spray nozzles or spray pipes 7 for spraying water or chemical treatment agents and fans 8 for drying the vehicle 2. The spray nozzles or spray pipes 7 can be arranged, for example, on the portal columns 3, the cross member 4 or on the roof dryer 6.

[0033] In one in the Fig. 1 and Fig. 2, which is designed to follow the height contour of the vehicle 2 and to blow the vehicle 2 dry using an air flow generated in the fan 8, a distributor bend 6 for distributing a detergent foam and a rinsing liquid (demineralized water) over the entire surface of the vehicle 2 is integrated in the vehicle treatment system 1 according to the first embodiment. The roof dryer / distributor bend 6 is mounted between the columns 3 and suspended from lifting belts, which, via winding rollers 20 and a winding shaft 21, provide the height adjustability of the roof dryer / distributor bend 6. An energy chain 24 supplies the roof dryer / distributor bend 6 with electrical power, control data, and the like. Furthermore, a compressed air connection 22 and a connection for foam liquid 23 for supplying the roof dryer / distributor bend 6 are provided on the portal column 3.

[0034] In a treatment method according to a preferred embodiment of the invention, the vehicle 2 is first treated / washed by various washing devices, such as brushes 5, spray nozzles / spray pipes 7, etc. After the vehicle 2 has been treated / washed by the preferred treatment system 1 shown, the gantry 1 is located at the rear of the vehicle 2. Residues of the washing liquid that still adhere to the vehicle surface must now be removed so that they do not leave stains on the paintwork of the vehicle 2 when it dries. While the gantry 1 moves forward again, a spray pipe 7 mounted between the pillars 3 sprays a liquid containing a hydrophobic additive, such as a wax, onto the vehicle surface from a number of nozzles distributed across the width of the gantry 1.By adhering to the vehicle's surface, this additive reduces its wettability and forces any remaining liquid to condense into droplets. These droplets contain a high level of non-volatile substances—not least due to the hydrophobic additive itself—so even small residues of these droplets can leave visible stains when they dry on the vehicle's surface.

[0035] To prevent this, an additional rinsing step is performed, during which the portal 1 feeds the distributor bend 6 with a rinsing fluid (fresh water) and moves forward to remove residues of cleaning and care products, as well as the hydrophobic additive. The water exits the outlets 10 of the distributor bend 6 as a jet 12, which extends from the outlet 10 to the vehicle surface as a continuous body, without breaking up into individual drops during the fall, and spreads in all directions from the point of impact on the vehicle surface as a water film adhering to the surface, or even overflows the vehicle surface. This rinses away any residues of the washing fluid and the hydrophobic additive.The liquid residues remaining on the vehicle 2 after passing through the distribution bend 6 are free of non-volatile components, except for small amounts of minerals naturally present in the fresh water used. These, too, condense into droplets under the influence of the hydrophobic additive deposited on the vehicle surface, which are blown off by the roof dryer 6.

[0036] It is obvious that other than those in the Fig. The arrangements of the washing brushes 4, 5, the distribution bend 6, the spray pipe 7, and the fans 8 on the gantry 1 shown in Figure 1 can be considered, depending on the direction in which the gantry 1 is moved during use of these tools and which of them are used in a single pass of the gantry 1 over the vehicle 2. Furthermore, a separate distribution bend can be provided for applying the foam and for rinsing, or the roof dryer can be designed separately and independently of the distribution bend. This is also necessary if the invention is to be used in a car wash in which the vehicles to be washed pass each tool used for treatment only once.

[0037] To effectively suppress stain formation, the surface of the vehicle 2 should be rinsed completely. In particular, splashes rich in non-volatile components should be avoided when the fresh water hits the vehicle surface, which then settle on previously rinsed surface areas. Therefore, for a high-quality rinsing result, it is important to prevent the formation of liquid splashes at outlet 10 (primary atomization) and the formation of liquid splashes upon impact (secondary atomization). To reduce the tendency for atomization / splashing during rinsing, various precautions have been taken in the washing portal 1 shown and in the process carried out with it.

[0038] First, the rinsing fluid is not applied via a spray nozzle, as is usually the case with the application of fluids in vehicle treatment systems, but rather as a continuous, atomization-free water jet 12. To further reduce the tendency for secondary atomization, the height of the outlets 10 can be controlled depending on the vehicle height so that the fall height of the rinsing fluid does not exceed a predetermined threshold. For this purpose, the sensors for controlling the height of the wash brushes 5 can be used. Finally, the jet 12 is aerated or foamed.

[0039] For this purpose, 10 outlets of the Fig. 1 to 3, aerators (Perlators®) are arranged, which aerate (foam) the jet 12 and thus reduce both primary and secondary atomization. For example, in a Fig. In the configuration of the distributor bend 6 shown in longitudinal section in Figure 3, the outlets 10 of a horizontal distributor pipe 9 extending across the entire width of the portal 1 are each equipped with a jet regulator 11. These each generate a continuous water jet 12 interspersed with fine air bubbles, which falls freely onto the vehicle 2 and is significantly less prone to splashing upon impact than a bubble-free water jet, since the air inclusions provide the water with space to escape upon impact.

[0040] The use of the jet regulators 11 enables a free fall height of several tens of centimeters between the outlet 10 and the vehicle surface, without any significant splashing of the jet upon impact. Therefore, with such an embodiment, it is not absolutely necessary to adjust the distributor bend 6 to the height profile of the vehicle 2 during rinsing. At least three, preferably at least four outlets 10 should be distributed across the width of the vehicle 2 to ensure that its surface is rinsed seamlessly across its entire width. Since the aerated jet 12 partially separates during the fall, it is advantageous to use a comparatively massive water jet 12 so that sufficient air is still mixed in upon impact. In the embodiment shown, the water jet 12 therefore has a diameter D of approximately 7 cm.The use of a jet regulator 11 has the further advantage that, despite the comparatively large jet diameter, water consumption is moderate. Alternatively, the jet 12 can also be foamed with compressed air, as will be explained in more detail later.

[0041] Fig. Figure 2 shows the distribution bend 6 of the first preferred embodiment. This is integrally formed with the roof dryer, which has peripheral fans that generate an airflow that is redirected via a distribution pipe and directed onto the vehicle from above. Furthermore, the distribution bend has foam generators and a foam pipe through which, for example, a washing foam can be applied to the vehicle 2 from above using spray nozzles. Finally, a distribution pipe 9 is provided, through which rinse water can be delivered to the various outlets 10 with the jet regulators 11 arranged thereon.

[0042] In the schematic representations of the Fig. 3 and Fig. 4, the same outlets 10 are used both for dispensing a foamed treatment agent and for dispensing an aerated rinsing jet 12. To an inlet end of the distribution pipe 9 of the Fig. 3, a fresh water line 14 and a foam generator 15 are connected via a T-piece 16. The fresh water line 14 as well as supply lines 17, 18 for detergent solution and compressed air to the foam generator 15 are each connected to a Fig. 3 is provided with a shut-off valve, not shown. As long as the fresh water line 14 is open, the supply lines 17, 18 are blocked, and a level difference between the outlet 10 of the foam generator 15 and the distribution pipe 9 prevents any residual foam from the foam generator 15 from mixing with the fresh water. When rinsing is finished and the vehicle 2 has left the portal 1, the shut-off valve of the compressed air supply line 17 can be opened so that air enters the distribution pipe 9 via the foam generator 15 and displaces the water. This ensures that when foam is dispensed via the distribution pipe 9 at the start of the next washing process, it is not diluted with water and is too thin to adhere to the vehicle 2 and have an effect. However, it is not absolutely necessary to produce the cleaning foam in a separate foam generator 15.With appropriate design coordination, the jet regulators 11 could also be used for this purpose.

[0043] Fig. Figure 4 shows an alternative arrangement without a jet regulator 11. Here, a foam generator 15, more precisely a compressed air foamer 15, is used to aerate the rinsing liquid jet 12. The thus foamed rinsing liquid jet 12 is then passed to the outlets via the distribution pipe 9. By adding a treatment agent via one of the supply lines 17, 18 (three or more supply lines are also possible), the same compressed air foamer 15 can also be used to generate a cleaning / treatment foam.

[0044] The exemplary portal 1 shown also has a control unit (not shown) which monitors and controls various parameters, such as the distance between the outlet 10 and the vehicle, the water pressure at the outlet 10, the travel speed of the portal 1, the angle of inclination of the outlet 10, etc., in such a way that atomization of the water jet 12 is further avoided.

[0045] Fig. 5 shows a front view of a gantry car wash 1 according to a further embodiment of the invention. As with reference to Fig. 1, the gantry 1 also comprises washing brushes 5 and a number of spray nozzles or spray pipes 7 for spraying a liquid containing a hydrophobic additive onto a vehicle 2 after washing. Of particular note in this embodiment are the ballistic outlets 26, which apply the rinsing liquid to the vehicle 2, with which the hydrophobic liquid is rinsed off again before the vehicle 2 is dried with the aid of fans 8. These are mounted on columns 3 of the gantry 1 above the belt line of the vehicle 2 and aligned to generate water jets 27, which initially rise diagonally from the ballistic outlets 26, describe an approximately parabolic trajectory and finally impact the vehicle 2. A distance sensor 28 is mounted on the gantry 1 to measure the height of the part of the vehicle surface located below the gantry 1, e.g.Roof 29 or trunk lid 30, and to adapt the pressure in a feed line to the ballistic outlets 26 to the measured height, so that when the roof 29 is below the portal 1, the apex of the water jets 27 is high enough to reach the roof 29 or its highest point, but on the other hand, when the trunk lid 30 is below the portal 1, the jets 27 do not fly so far that the lateral edges of the trunk lid 30 remain unflushed. The ballistically guided rinsing fluid jets shown can also advantageously be ventilated and have comparatively large diameters. For this purpose, the device shown in . Fig. 5, the jet regulator 11 is arranged at the ballistic outlets 26. List of reference symbols D diameter; 1 portal; 2 vehicles; 3rd pillar; 4 portal traverse; 5 washing brush; 6 distribution bend / roof dryer; 7 spray nozzles / spray tubes; 8 fan; 9 distribution pipe; 10 outlet; 11 aerator / Perlator®; 12 Rinsing liquid / aerated water jet; 14 fresh water pipe; 15 foam generators; 16 T-piece; 17 supply line; 18 supply line; 20 winding rolls for lifting belts; 21 winding shaft; 22 compressed air connection; 23 Connection for foam liquid; 24 Energy chain; 26 ballistic outlet; 27 water jet; 28 distance sensor; 29 roof; and 30 trunk lid.

Claims

[1] Method for treating a vehicle comprising the steps of: - Washing the vehicle (2), - Applying a drying agent to the vehicle, - Rinse off the drying aid, and - Blowing on the vehicle to dry it, characterized by , that the liquid used to rinse off the drying aid is applied to the vehicle (2) as a continuous jet (12, 27) extending continuously from at least one outlet (10, 26) to the vehicle (2); and the continuous jet (12, 27) is a ventilated jet. [2] Method according to claim 1, characterized by that the continuous jet (12, 27) is aerated by means of a jet regulator (11) or a compressed air foamer before being applied to the vehicle. [3] Method according to one of claims 1 to 2, characterized bythat the height of the outlet (10, 26) is adjusted depending on the height of a surface of the vehicle to be rinsed and / or the continuous jet (12, 27) is guided ballistically. [4] Method according to one of claims 1 to 3, characterized by that the continuous beam (12, 27) has a minimum diameter of at least 1 cm, preferably at least 3 cm, particularly preferably at least 6 cm in its cross-section. [5] Method according to one of claims 1 to 4, characterized by that the liquid used to rinse off the drying aid is water free of surface-active substances. [6] Vehicle treatment plant (1), with: - a washing device (5, 7) for washing the vehicle (2), - an application device (7) for applying a drying aid to the vehicle, - at least one outlet (10, 26) for a rinsing liquid and - a drying device (8) for drying the vehicle by blowing, characterized by , that the outlet (10, 26) is designed and arranged such that the rinsing liquid is formed into a jet (12, 27) extending continuously from the outlet to the vehicle and the outlet (10, 26) has a jet regulator (11) or is in fluid communication with a compressed air foamer in order to aerate the continuous jet (12, 27). [7] Vehicle treatment system (1) according to claim 6, characterized by that the outlet is height adjustable. [8] Vehicle treatment system (1) according to one of claims 6 or 7, characterized byin that the outlet (26) is directed upwards for ballistic guidance of the laminar jet and a height of the outlet (26), an angle of attack of the outlet (26) and / or a pressure in a supply line leading to the outlet (26) is / are controlled as a function of the height of a surface of the vehicle to be rinsed.

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