DE102023203819B4 - Supply module for a cleaning system - Google Patents

Abstract

Supply module (1) for a cleaning system (100) arranged in a vehicle, wherein the supply module (1) comprises at least one pump (3) for pumping the cleaning fluid (2) from a reservoir (4) to at least one cleaning nozzle and at least one sensor (S) for detecting at least one parameter of the cleaning fluid (2) in the reservoir (4) and is arranged at least partially in an interior space (5) of the reservoir (4) that can be filled with the cleaning fluid, characterized in that the supply module (1) has a wet chamber (12) and a dry chamber (13), wherein the wet chamber (12) is hydraulically connected to the interior space (5) and the dry chamber (13) is hydraulically isolated from the interior space (5), wherein the pump (3) has an electric drive and, in its installed position, is arranged together with this drive near the bottom of the reservoir (4) in the wet chamber (12), and wherein electrical and/or electronic components (14) which are connected to the pump (3) and at least one sensor (S) cooperate, are arranged and wherein the supply module (1) comprises at least one pressure sensor (7) for detecting a hydraulic pressure on the pressure side of the pump (3).

Description

The present invention relates to a supply module for a vehicle-integrated cleaning system for cleaning defined surfaces in the exterior of the vehicle such as windows, headlights and in particular cameras and sensors of modern vehicles, as well as the corresponding cleaning system.

Such cleaning systems are known. In these systems, special cleaning nozzles for cameras and sensors (such as LiDAR sensors) are typically integrated into a conventional windshield cleaning system. These systems have several disadvantages. Firstly, the control options for individual nozzles are limited, and multiple components often need to be combined. For example, a rear-view camera might be cleaned simultaneously with the rear window – the rear-view camera cleaning is linked to the control of the rear window cleaning system. This increases the consumption of cleaning fluid and the strain on the pump drive.

Conventional cleaning systems typically use simple DC motors with carbon brushes as pump drives. These drives are usually designed for short-term operation, making them correspondingly compact and cost-effective. However, their performance and controllability are comparatively limited, and the possible flow rate is severely restricted. The conventional pumps driven by these motors can only operate a few consumers or nozzles simultaneously. Modern vehicles designed for autonomous driving often have five or more individual sensors that require cleaning, in addition to the usual headlight and windshield washer nozzles. The performance of conventional pump drives in such systems is usually exhausted quickly, and prolonged cleaning processes with a high required flow rate can lead to thermal and hydraulic overload of the pump drives.

Furthermore, there is no way to adjust the pump's hydraulic parameters to the cleaning fluid properties. For example, water-alcohol mixtures, which have a higher viscosity, are used as cleaning fluids in winter. At low temperatures, the viscosity increases even further. Conventional pump drives often cannot compensate for the resulting hydraulic friction losses, leading to inadequate cleaning results. To mitigate this problem, separate heating devices often have to be installed inside the storage tank. This increases the complexity and manufacturing costs of the storage tanks.

A pump is usually positioned laterally outside the container and hydraulically connected to the container interior by means of a connection nozzle and a seal, as is the case, for example, with... DE 10 2005 043 561 A1 This is known. However, such a connection point is a potential source of leakage, and the connection nozzle can cause pressure losses, further reducing the pump's performance.

Out of DE 11 2015 005 034 T5 The system features a pump located outside the tank, with an integrated liquid level sensor positioned in a tube on the pump housing. This simplifies the connection wiring and the tank design, as a separate sensor and its associated electrical connection are eliminated. However, this design does not resolve the disadvantages described above.

Out of DE 19 25 116 A1 It is known to position the pump drive in the upper part of the reservoir's interior and attach it to the cap. With this solution, filling the reservoir becomes problematic, as the entire pump unit must be removed each time. Furthermore, this leads to an unfavorable weight distribution, especially when the reservoir is empty, and increased stress on the reservoir's mounting points.

The object of the invention is therefore to propose a solution that can efficiently and efficiently supply cleaning fluid to modern cleaning systems with many different consumers.

The problem is solved according to the invention by a supply module with features according to independent claim 1.

Further details and developments result from the dependent claims together with the description.

The invention provides a supply module designed as a plug-in module for insertion into the reservoir, compactly combining all necessary components for a complex cleaning system, particularly for camera and sensor cleaning. Such a module can be easily adapted to different reservoirs simply by adjusting its height.

In particular, the supply module includes a pump as well as one or more sensors, especially a pressure sensor on the pressure side of the pump, which are required for the efficient operation of components of the cleaning system, and the necessary hydraulic and electrical interfaces.

The supply module features a wet chamber and a dry chamber. The sensors or their sensing components can be arranged in the wet chamber along with the pump, where they are directly immersed in cleaning fluid. This necessitates only very short connecting cables to link the required evaluation or other electronic components, which are safely protected from moisture and located nearby in the dry chamber. For particularly short connection paths and an efficient design, the sensors can be mounted directly on or integrated into the partition between the two chambers.

The height of the supply module can be easily adjusted to the respective tank depth by modifying its housing height, ensuring it ends as close to the tank bottom as possible. This allows the pump and its electric drive to remain immersed in the cleaning fluid for an extended period, thus maintaining effective cooling of the pump drive and simultaneously preventing the cleaning fluid from warming.

Furthermore, the supply module can include an integrated interface for filling the reservoir with cleaning fluid, with the reservoir preferably being filled via the wet chamber of the supply module. This intensifies the mixing, particularly when adding unmixed cleaning fluid components such as cleaning concentrate or antifreeze, through the resulting turbulence, and prevents undesirable layer formation.

The supply module can be equipped with electronic components and separate control units which, as needed, can selectively control individual components of the cleaning system, such as the electromagnetic shut-off valves upstream of the individual nozzles. For this purpose, fluid lines, nozzles, and corresponding control lines are routed to all valves, which are simultaneously pressurized by the common pump in the supply module.

The pump drive is preferably designed as a BLDC motor, since such a motor is particularly powerful and low-wear and can achieve a long runtime, up to continuous operation, when simultaneously actuating a large number of nozzles.

Additionally, a BLDC drive can be controlled electronically as needed. For example, the line pressure measured by a pressure sensor can be kept constant by means of PWM control of the drive, regardless of the number of activated consumers. Likewise, the active drive control can compensate for viscosity effects with different cleaning fluids and different fluid temperatures.

To record these parameters, the supply module can be equipped with freezing point, fill level, temperature, and pressure sensors. The specific configuration can be customized to meet individual needs and customer requirements.

The power supply module can include a combined multi-pole electrical interface for communication with an electronic control unit in the vehicle and for powering the module and its components. This simplifies installation in the vehicle. The interface can, for example, provide the module's central power supply, a CAN or LIN interface for vehicle communication, and control contacts for all necessary switching valves of the cleaning system. Furthermore, it can also integrate control for an additional compressed air system, which, for example, could be supplied by an external air compressor and used to selectively dry specific sensors.

Furthermore, connection options for separate hose or nozzle heaters can be integrated, which can be activated depending on the detected temperature.

• 1 einen Vorratsbehälter mit einer ersten Ausführungsform des Versorgungmoduls mit seitlich nebeneinander angeordneten Nass- und Trockenkammern.
• 2. einen Querschnitt eines Versorgungsmoduls mit seitlich nebeneinander angeordneten Nass- und Trockenkammern.
• 3 einen Vorratsbehälter mit einer zweiten Ausführungsform des Versorgungsmoduls mit axial übereinander angeordneten Nass- und Trockenkammern.
• 4 einen Vorratsbehälter mit einer dritten Ausführungsform des Versorgungsmoduls mit einer räumlich entfernt ausgelagert vorgesehenen Trockenkammer.
• 5 drei verschiedene Ausführungsformen eines Füllstandssensors.
• 6 zwei verschiedene Ausführungsformen eines Füllstandssensors mit einem beweglichen Geber.
• 7 zwei verschiedene Ausführungsformen eines Füllstandssensors ohne bewegliche Elemente.
• 8 ein beispielhaftes Reinigungssystem mit einem Versorgungsmodul in einem Fahrzeug.

The invention is explained in more detail below with reference to the figures. They show, in a simplified form and not to scale:

• 1 a storage container with a first embodiment of the supply module with wet and dry chambers arranged side by side.
• 2 . a cross-section of a supply module with wet and dry chambers arranged side by side.
• 3 a storage container with a second embodiment of the supply module with axially stacked wet and dry chambers.
• 4 a storage container with a third embodiment of the supply module with a drying chamber located at a remote location.
• 5 three different designs of a level sensor.
• 6 two different designs of a level sensor with a movable sensor.
• 7 two different designs of a level sensor without moving parts.
• 8 An exemplary cleaning system with a supply module in a vehicle.

Fig. 1

1 Figure 1 shows, schematically and in a highly simplified form, a first embodiment of a supply module 1 for a cleaning system installed in a vehicle. The supply module 1 is designed to be inserted into the interior 5 of a reservoir 4 filled with cleaning fluid 2.

The supply module 1 shown includes a pump 3 for pumping the cleaning fluid 2 from the storage tank 4 to the consumers not shown here, such as cleaning nozzles, several sensors S for recording various parameters of the cleaning fluid 2, electronic components 14, which are required for the operation of the pump 3 and sensors S, as well as the necessary interfaces such as electrical or hydraulic plugs and couplings.

Pump 3 has an electric drive, preferably a BLDC (brushless) DC motor. This type of motor offers high power output, can be controlled very flexibly and adaptively via electronic control, for example by pulse width modulation (PWM), and also exhibits very low wear.

Within the invention, the selection and number of sensors can vary to be adapted to the specific needs and tasks.

• - Einen Füllstandssensor 6 zum Erfassen Des Füllstandes L der Reinigungsflüssigkeit 2 in dem Innenraum 5.
• - Einen Drucksensor 7 zum Erfassen des hydraulischen Druckes auf der Druckseite der Pumpe 3.
• - einen Gefrierpunktsensor 8 zur Bestimmung des Gefrierpunktes der Reinigungsflüssigkeit 2.
• - Einen Temperatursensor 9 zum Erfassen der Temperatur der Reinigungsflüssigkeit 2.

The illustrated embodiment of the supply module 1 contains the following sensors:

• - A level sensor 6 for detecting the level L of the cleaning fluid 2 in the interior 5.
• - A pressure sensor 7 for detecting the hydraulic pressure on the pressure side of the pump 3.
• - a freezing point sensor 8 for determining the freezing point of the cleaning fluid 2.
• - A temperature sensor 9 for measuring the temperature of the cleaning fluid 2.

Knowing the current fill level L allows, for example, the driver to be prompted to refill the reservoir 4 in good time or preventing the pump 3 from running dry.

Knowing the current pressure in the cleaning system allows, for example, the pump control to be optimized as needed, and it also allows errors such as leaks or blockages to be detected.

A cleaning fluid 2 is generally a mixture of various components such as water, alcohol, surfactants, glycols, etc. Depending on the concentration of the individual components, the mixture freezes at different temperatures. Knowing the current freezing point of the mixture allows for timely and appropriate measures to be taken in winter to maintain the functionality of the cleaning system. For example, the driver can be warned, a separate heating device (if present) can be activated, or, if an automated dosing system is installed, antifreeze concentrate can be added automatically.

The cleaning fluid 2 can exhibit different viscosities at different temperatures. Particularly at low temperatures, the viscosity, and therefore the resistance to pumping the cleaning fluid, can increase. Knowing the current temperature allows the control of pump 3 to be optimized. For example, it can be operated at different power levels or speeds at different temperatures to achieve the required flow rate for a consistent cleaning effect.

The supply module 1 has a housing 10, which is immersed in the cleaning fluid 2 in the interior 5 through an opening in the wall of the reservoir 4, and a lid 11, which remains on the outside of the reservoir 4 when installed and closes the opening in the wall of the reservoir 4. The type of closure can be implemented differently within the invention, as required. For example, it can be a screw, snap-fit, or bayonet connection. It can also be designed as a welded or bonded joint.

The housing 10 is preferably made of plastic by injection molding or another suitable process, for example from the same or comparable material as the storage container 4.

The supply module 1 has a wet chamber 12 and a dry chamber 13, which are hydraulically sealed from each other. In the illustrated embodiment, the wet chamber 12 and the dry chamber 13 are arranged side by side in the housing 10 and separated from each other by a hydraulically sealed partition 15.

The wet chamber 12 is designed such that the same fill level L is present in it as in the interior 5. For this purpose, the wet chamber 12 has an opening to the interior 5 or a hydraulic connection 21 near the bottom, whereby in the upper area a ventilation channel 22 through the lid 11 enables pressure equalization with the atmosphere and prevents the formation of air bubbles in the wet chamber 12.

The pump 3 and the sensor sensing components are arranged in the wet chamber 12, such that both the sensor sensing components and the outer surfaces of the pump 3 have direct contact with the cleaning fluid 2. Furthermore, the pump 3 is positioned as low as possible, or as close as possible to the bottom of the container, and in the immediate vicinity of the hydraulic connection 21 to the interior 5. For this purpose, the height of the housing 10 is adjusted to the respective reservoir 4 so that it extends as far as possible to the bottom and the hydraulic connection 21 is located as low as possible on the housing 10.

Direct contact between the fluid and the cleaning fluid improves heat exchange. This allows pump 3 to transfer its waste heat directly to the cleaning fluid during operation. At warm temperatures and during continuous operation, this provides effective cooling for pump 3, eliminating the need for separate heating devices in freezing conditions.

The low-lying position of pump 3 ensures that, firstly, direct contact with the cleaning fluid 2 is maintained for as long as possible as consumption increases, and secondly, that the area of the intake opening is located near the heat source.

Furthermore, due to its location near the bottom, pump 3 can draw the cleaning fluid 2 directly, without the need for any suction lines. This reduces pressure losses and the risk of clogging.

To utilize the available volume of the reservoir 4 more effectively, a depression 20 is formed in its base. In its installed position, this depression forms the lowest point of the interior 5 and collects any remaining cleaning fluid 2 in the event of excessive consumption. The housing 10 is designed so that its lower end is immersed in the depression, and the hydraulic connection 21 is also located within it.

Electrical and/or electronic components 14, required for the operation of the pump 3 and the operation and/or evaluation of the sensors S, are housed in the hydraulically isolated dry chamber 13. The components 14 can, for example, be arranged on a circuit board mounted in the dry chamber. The necessary electrical connecting cables to the sensors or their components in the wet chamber 12 can advantageously be kept short. The individual conductors can be integrated directly into the partition 15, for example, by overmolding the partition 15 over the existing conductors, or by routing them through it using separate sealing elements.

An electrical interface 17 serves to connect the supply module 1 to the vehicle's electrical system. This is preferably designed as a combined multi-pole plug connection which includes all necessary contacts.

Preferably, the storage container 4 is also filled through the wet chamber 12 of the supply module 1, for which a corresponding filling interface 19 or a filling nozzle is provided on the lid 11. This accelerates the mixing of the individual components of the cleaning fluid, such as water, cleaning concentrate or antifreeze, and counteracts undesirable layer formation, particularly when individual components of the cleaning fluid, such as water, cleaning concentrate or antifreeze, are added separately.

However, a conventional filling connection directly on the container housing, independent of the supply module 1, remains permissible within the scope of the invention.

For connecting hydraulic lines not shown here, which are used for hydraulic To supply the periphery or consumers of the cleaning system, a pressure connection 18 is provided on the supply module 1, which is connected to the pressure side of the pump 3.

Fig. 2

2 Figure 1 shows a cross-section through an embodiment of the supply module 1 with a round housing 10. Such a round housing 10 can be easily connected and sealed to the reservoir 4, for example, by means of a bayonet fitting or screw cap. The wet chamber 12 occupies the larger part of the housing cross-section. A pump 3, shown only symbolically, is positioned in the wet chamber 12 near the hydraulic connection 21. Several sensors S'-S''' are positioned next to each other directly on the partition 15, forming a kind of sensor cluster. A circuit board with electronic components 14 is also arranged on the partition 15 opposite the sensors in the dry chamber 13, so that the necessary connections between the electronic components 14 and the sensors can be implemented as short as possible.

Fig. 3

3 shows a second embodiment of the supply module 1. In contrast to the embodiment according to 1 The wet chamber 12 occupies the entire volume of the housing 10, whereas the dry chamber 13 is located outside the reservoir 4 on the lid 11. The two chambers are thus positioned one above the other, not side by side. This arrangement offers advantages in terms of insulating the dry chamber 13, but may be less than optimal with regard to the required installation space and the connection length between the individual sensors and associated electronic components.

Fig. 4

4 shows another embodiment of the supply module 1. While the wet chamber 12, as in the embodiment according to 3 The drying chamber 13, in which the housing 10 is arranged, is housed in a separate enclosure located outside and spatially separated from the storage container 4. Both components are connected to each other via an electrical line 16. Such a configuration may be necessary, for example, in the case of very limited available installation space or a very complexly shaped storage container, when combining the components in a single module housing according to the principles of the embodiments shown in [reference to relevant section] is not desired. 1 and 3 is not possible.

Fig. 5

5 This simplified figure shows three different configurations of the level sensor 6, which is designed as an ultrasonic sensor. Other components such as pump 3 or additional sensors are not shown for clarity.

The ultrasonic level sensor 6 functions essentially like any ultrasonic distance measuring device. It has a transceiver unit 23 and, additionally, a measuring tube 24, which is designed to prevent scattering and reflections of the ultrasonic waves by surrounding components. The measuring tube 24 is hydraulically connected to the interior 5 and has the same fill level L. Ultrasonic waves are emitted by a transmitter in the transceiver unit 23, reflected by the interface between the cleaning fluid 2 and the air above it, and detected by a receiver in the transceiver unit 23. The fill level L is calculated from the measured transit time, assuming the propagation speed is known.

In the configuration shown in view a), the transceiver unit 23 is positioned as close as possible to the bottom of the container and directly below the measuring tube 24, and is oriented vertically. It is connected to electronic components 14 in the drying chamber 13 through the partition 15. The ultrasonic waves are emitted along the vertical axis.

In the embodiment according to view b), the transceiver unit 23 is located in the drying chamber 13, directly adjacent to the circuit board containing the electronic components 14, and is oriented horizontally. The measuring tube 24 is bent at 90° and equipped with a reflective surface 25, which deflects the ultrasonic waves vertically towards the liquid surface and, after reflection, back to the transceiver unit 23.

The sensor configuration according to view c) is for the execution of the supply module 1 according to 3 with the drying chamber 13 arranged above the lid 11. The transceiver unit 23 is located directly on the circuit board with the electronic components 14 and is oriented vertically downwards. In this configuration, the distance to the liquid surface must be measured through the air. While this is less efficient compared to measurement in liquid, the advantages of the overall efficient arrangement However, advantages can prevail under certain circumstances.

Fig. 6

6 Figure 1 shows two embodiments of the level sensor 6 with a movable position transmitter 26. The position transmitter 26 is designed as a classic float, for example with an integrated magnet, and floats on the surface of the cleaning fluid 2.

In the embodiment according to view a), the position sensor 26 is ring-shaped and moves in the wet chamber 12 on a vertical guide rod 27 in the immediate vicinity of the partition 15. Immediately behind the partition 15 in the dry chamber 13 is a vertical row of sensing elements 28, which register the respective position of the position sensor 26. Depending on the design of the sensing elements 28, the fill level L can thus be detected in steps (e.g., with reed switches) or continuously (e.g., with Hall effect sensors).

In the embodiment according to view b), the position sensor 26 is spherical and floats in a vertically oriented guide tube 29. The detection can be carried out in the same way as in the embodiment according to view a).

Fig. 7

7 shows 2 further particularly compact versions of the level sensor 6 without active elements.

The design according to view a) enables continuous level measurement and functions resistively, i.e., by measuring the resistance at two electrodes 30, 30', which are in direct contact with the cleaning fluid 2. A small reference electrode 31 is located near the bottom and serves for calibration and plausibility checks. The electrodes 30, 31 can be designed as separate components in the wet chamber 12 or integrated directly into the partition 15, for example by overmolding.

The design according to view b) functions on the same principle as the design according to view a), but is designed for discrete measurement of individual defined fill levels. A vertical row of individual, spaced-apart electrodes 30, arranged one above the other, is integrated into the partition 15. An additional reference electrode 31 is positioned near the bottom.

Fig. 8

8 This simplified and purely illustrative diagram shows a cleaning system 100 for an autonomous vehicle. The depicted vehicle contains four cameras for all-around vision and a forward-facing LiDAR. The cleaning system 100 is thus configured to clean the windshield, headlights, and all the aforementioned cameras and sensors. For this purpose, several spray nozzles for the cleaning fluid are distributed throughout the vehicle. In addition, the cleaning system 100 includes pneumatic air nozzles. These are used, for example, for quickly drying camera lenses or sensor surfaces and are supplied by a separate compressed air source, such as a compressor. All nozzles in the illustrated embodiment are equipped with upstream electrically controlled switching valves for particularly fast response and efficient consumption. This allows the pump or compressor to build up and maintain the required base pressure within the system over a longer lead time. The individual consumers or nozzles are activated by the switching valves as needed and are therefore always immediately ready for use.

The electronic components 14 in the drying chamber 13 can be implemented in a variety of ways within the invention, depending on the design and requirements. In addition to elements necessary for the functionality of the sensors S and pump 3, a programmable electronic control unit can also be implemented, for example. Such an electronic control unit can be used to control all components within the cleaning system 100, taking into account individual parameters of the cleaning fluid detected by the sensors. For example, the operating time and power of the pump can be adjusted depending on the temperature, or certain nozzles can be deactivated when the fluid level is low, etc. In other words, the cleaning system 100 can be controlled completely or partially by the supply module 1.

Alternatively, the control of all or individual components of the cleaning system 100 can also be taken over by another vehicle control unit, which is connected to the supply module 1 via electrical lines.

Reference symbol list

1

Supply module

2

Cleaning fluid

3

pump

4

Storage container

5

interior

6

Level sensor

7

Pressure sensor

8

Freezing point sensor

9

temperature sensor

10

Housing

11

Lid

12

wet room

13

Drying chamber

14

Electronic components

15

partition

16

Electrical line

17

Electrical interface

18

Pressure connection

19

Filling interface

20

depression

21

Hydraulic connection

22

ventilation duct

23

Transceiver unit

24

Measuring tube

25

reflective surface

26

Position giver

27

Command staff

28

sensing element

29

Guide tube

30

electrode

31

Reference electrode

32

Cleaning nozzle

33

air nozzle

34

Switching valve

35

compressed air source

36

Vehicle control unit

100

Cleaning system

L

Fill level

S

sensor

Claims (13)

Supply module (1) for a cleaning system (100) arranged in a vehicle, wherein the supply module (1) comprises at least one pump (3) for pumping the cleaning fluid (2) from a reservoir (4) to at least one cleaning nozzle and at least one sensor (S) for detecting at least one parameter of the cleaning fluid (2) in the reservoir (4) and is arranged at least partially in an interior space (5) of the reservoir (4) that can be filled with the cleaning fluid, characterized in that the supply module (1) has a wet chamber (12) and a dry chamber (13), wherein the wet chamber (12) is hydraulically connected to the interior space (5) and the dry chamber (13) is hydraulically isolated from the interior space (5), wherein the pump (3) has an electric drive and, in its installed position, is arranged together with the drive near the bottom of the reservoir (4) in the wet chamber (12), and wherein electrical and/or electronic components (14) which are connected to the pump (3) are located in the dry chamber (13). and cooperate with at least one sensor (S), are arranged and wherein the supply module (1) comprises at least one pressure sensor (7) for detecting a hydraulic pressure on the pressure side of the pump (3). Supply module (1) according to Claim 1 characterized in that the supply module (1) includes a level sensor (6) for detecting the level of the cleaning fluid in the interior (5). Supply module (1) according to at least one of the preceding claims characterized in that the supply module (1) comprises a freezing point sensor (8) for determining the freezing point of the cleaning fluid (2). Supply module (1) according to at least one of the preceding claims characterized in that the supply module (1) comprises a temperature sensor (9) for detecting the temperature of the cleaning fluid (2). Supply module (1) according to at least one of the preceding claims characterized in that the supply module (1) is designed for insertion into the storage container (4) and has a housing (10) which is designed for insertion into the interior (5) of the storage container (4) and a lid (11) which remains on the outside of the storage container (4) in the installed state. Supply module (1) according to at least one of the preceding claims characterized in that the storage container (4) has a bottom depression (20) which in the installed position forms the lowest point of the interior (5) and at least one hydraulic connection (21) between the interior (5) and the wet chamber (12) is arranged in the bottom depression (20) in the installed state. Supply module (1) according to at least one of the preceding claims characterized in that the wet chamber (12) and the dry chamber (13) are arranged in the housing (10) and are separated from each other by a hydraulically tight partition (15). Supply module (1) according to at least one of the preceding claims characterized in that the wet chamber (12) is arranged in the housing (10) and the dry chamber (13) is arranged on the lid (11) outside the storage container (4). Supply module (1) according to at least one of the preceding claims characterized in that the supply module (1) comprises an electrical interface (17) which serves to connect the electrical and/or electronic components (14) to an electrical on-board network of the vehicle. Supply module (1) according to at least one of the preceding claims characterized in that the supply module (1) comprises at least one hydraulic pressure port (18) connected to the pressure side of the pump (3) for connecting a hydraulic line leading towards at least one cleaning nozzle. Supply module (1) according to at least one of the preceding claims characterized in that the supply module (1) has a filling interface (19) which serves to fill the interior (5) with cleaning fluid (2) and/or its components. Supply module (1) according to at least one of the preceding claims characterized in that the pump (3) comprises a brushless DC motor as a drive. Vehicle-integrated cleaning system for cleaning at least one defined external surface section of a vehicle, comprising at least one supply module (1) according to at least one of the preceding claims.