DE102019120845B4 - Device and method for adjusting a foot point of a spring element for a vehicle - Google Patents

Abstract

Device for adjusting a foot point of a spring element (12) for a vehicle, the device (10) comprising a first wall element (14) for connection to a vehicle, a second wall element arranged at a distance from the first wall element (14) for connection to the spring element (12), and a chamber (18) arranged between the first wall element (14) and the second wall element (16) for changing the distance between the first wall element (14) and the second wall element (16) by means of a change in a volume of the chamber (18), wherein the chamber (18) has an incompressible fluid (27) and the first and/or second wall element (16) comprises a passage opening (20) for the incompressible fluid (27) to the chamber (18), the passage opening (20) can be connected in fluid communication with an input/output device (22) for the incompressible fluid (27) to change the volume of the chamber (18), and wherein the chamber (18) has a chamber wall (24) with at least one has a third wall element (25) extending from the first wall element (14) to the second wall element (16), the mass of which is constant when the volume of the chamber (18) changes, characterized in that the third wall element (25) has a has a part which is arranged hanging over a flange (13) of the second wall element (16), the third wall element (25) being able to be clamped between the first wall element (14) and the second wall element (16) when the quantity of the incompressible fluid (27) in the chamber (18) is increased.

Description

The invention relates to a device for adjusting a base point of a spring element for a vehicle, a system comprising the device and a method for adjusting a base point of a spring element for a vehicle.

In vehicles, the vehicle body is connected to the wheel suspension via vehicle springs. This serves to propel the wheels away from the vehicle body during travel after impacts that move the wheels and suspension toward the vehicle bodies. Depending on the loading condition of the vehicle, the vehicle springs are compressed to different degrees. This also changes the distance between the wheels or the wheel suspension and the vehicle body. Some, especially future, mobility concepts require that the vehicle level can be kept constant or adjusted in a targeted manner for different loading conditions. Optimum positioning in relation to the airstream is required for cooling and optimum ground clearance for electrically powered vehicles. For this purpose, level controls are used to adjust a position of a foot point of the vehicle springs.

From the U.S. 3,598,422 A For example, hydraulic base point displacement devices for a vehicle suspension spring on the body or wheel side connection via hydraulic cylinders with sliding seals are known. However, sliding seals are complex, expensive to manufacture and vulnerable to sealing. The friction occurring in the seal increases the power requirement when adjusting. Especially in the case of free-standing springs without integrated shock absorbers, a linear guide function must be implemented in the hydraulic cylinder, which requires additional overall height.

Out of DE 11 36 219 B a suspension for vehicles is known as generic prior art. The suspension is connected to a body of a vehicle via a device which has a bellows which is arranged between two wall elements. By filling the bellows with pressurized oil through one of the wall elements, the volume of the bellows can be changed and thus the distance between the two wall elements can be changed. Changing the distance changes the base point of the suspension.

Next is over DE 10 2014 108 241 A1 a suspension system for a vehicle having a vehicle body and a road wheel is known. The suspension system includes a suspension corner that connects the road wheel to the vehicle body. The suspension corner maintains contact between the road wheel and a road surface. The suspension system includes a bladder located in the suspension corner for pumping and holding a volume of fluid in response to forces generated at the wheel. The suspension system also includes an accumulator in fluid communication with the bladder for selectively accumulating fluid pumped through the bladder and for dumping the fluid to the bladder. The suspension system also includes a valve for selectively holding and venting accumulated fluid in the accumulator. The height of the bladder varies in response to the volume of fluid held by the bladder to adjust a vehicle ride height at the suspension corner.

The object of the invention can therefore be seen as providing a device for adjusting a base point of a spring element for a vehicle that is simple in design, inexpensive and has a high control speed for vehicle dynamics control.

The object of the invention is solved by the features indicated in the independent claims 1, 12 and 14. Configurations are the subject of claims 2 to 11 and 13.

In a device for adjusting a base point of a spring element for a vehicle, the device comprising a first wall element for connection to a vehicle, a second wall element arranged at a distance from the first wall element for connection to the spring element, and one between the first wall element and the second Chamber arranged in a wall element for changing the distance between the first wall element and the second wall element by means of a change in a volume of the chamber, the chamber having an incompressible fluid and the first and/or second wall element comprising a passage opening for the incompressible fluid to the chamber, the Through-opening can be fluidly connected to an input/output device for the incompressible fluid to change the volume of the chamber, the chamber having a chamber wall with at least one third wall element extending from the first wall element to the second wall element, d whose mass is constant with a change in the volume of the chamber, it being provided according to the invention that the third wall element has a part which is arranged hanging over a flange of the second wall element, the third wall element between the first wall element and the second Wall element is tensioned when the amount of incompressible fluid is increased in the chamber.

The core of the invention is the use of a chamber whose chamber wall has a surface area that remains largely constant when the volume of the chamber changes. i.e. a third wall element is part of the chamber wall and extends before and after a volume change with the same contact points from the first wall element to the second wall element without adding or subtracting areas to the third wall element. The mass of the third wall element remains constant. Thus, no sliding seal is required to cause a change in the surface area of the chamber wall when the volume of the chamber changes. In order to change the volume of the chamber, an incompressible fluid, such as hydraulic oil or glycol, is introduced into or removed from the chamber via the through-opening. The amount of incompressible fluid in the chamber defines the volume of the chamber. The surface area of the incompressible fluid in the chamber remains largely constant when the quantity of the incompressible fluid in the chamber and thus the volume of the incompressible fluid changes. The surface area of the incompressible fluid arranged in the chamber corresponds to the surface area of the chamber wall. Furthermore, a change in volume of the chamber causes the distance between the first wall element, which can be connected to the vehicle, and the second wall element, which can be connected to a spring element for a vehicle, for example a vehicle spring, to change. An increase in volume of the chamber causes an increase in the distance, while a decrease in volume of the chamber causes a reduction in the distance. The incompressible fluid arranged in the chamber has the effect that a change in volume of the chamber is not caused by external forces that occur in vehicles. The first wall element and the second wall element can further, for example, be arranged opposite one another, i. H. be positioned on two opposite sides of the chamber. In this way, the position of a base point of a spring element of a vehicle can be changed in order to change the vehicle level. Because no sliding seal is required, the device is simple in construction and inexpensive. Furthermore, the use of the incompressible fluid provides a high control speed for vehicle dynamics control, since the incompressible fluid can be conducted into and out of the chamber at high speed.

A connection to the vehicle body can also be made via a wheel suspension. That is, the device can be arranged between the spring element and the vehicle body or between the spring element and a wheel suspension.

According to one example, the chamber wall may include the first wall element and the second wall element.

The first wall element and the second wall element can thus also be part of the chamber wall. Furthermore, this simplifies the manufacture of the chamber, so that costs can be saved.

In a further example, the third wall element has at least one deformable wall element which is flexible and tensile and extends between the first wall element and the second wall element.

With the deformable wall element, a chamber wall can be provided in a simple manner, the surface area of which remains constant when the volume of the chamber changes, if the quantity of the incompressible fluid in the chamber changes. The chamber wall thus has a wall element which, in combination with the incompressible fluid in the chamber, is stiff in the main effective direction of the chamber between the first wall element and the second wall element, but is flexible against displacements or tilting of the first wall element and the second wall element relative to one another. In this way, forces outside the main load direction, directions of force action and force distributions between the vehicle body and the spring element can be compensated.

According to a further example, the third wall element can be connected to the first wall element and the second wall element by means of a sealing element.

The chamber can thus be made, for example, from a number of wall elements which are connected to one another by means of sealing elements. A chamber is thus provided which is easy to manufacture and has sufficient tightness.

Furthermore, the at least one third wall element can have, for example, a fluid-tight fabric or a fabric- and/or fiber-reinforced membrane, preferably a reinforced elastomer membrane.

The third wall element can be designed in the form of a bellows, for example as a bellows. A cost-effective, deformable wall element is thus provided.

According to a further example, the chamber can have two deformable wall elements arranged opposite one another.

The chamber can be defined, for example, by means of the first and second wall elements and the two deformable wall elements arranged opposite one another. In this way, a toroidal chamber can be provided, for example, which has an opening in the middle, through which, for example, a shock absorber element can be guided. In this case, the first wall element and the second wall element can, for example, be ring-shaped. The shock absorbing element can then be placed through the openings of the rings of the first wall element and the second wall element. In this way a device can be provided with a toroidal chamber with annular first and second wall elements, which can be arranged around a shock absorber.

Furthermore, the third wall element can have, for example, at least two wall sections, the at least two wall sections being connected to one another by means of a sealing element.

For example, one wall section can be connected to the first wall element and the other wall section can be connected to the second wall element. In this way a chamber can be provided which has a plurality of sub-chambers which are defined by the individual wall sections. In this way, for example, greater overall heights for the device can be provided using standard parts for the deformable wall elements in order to save costs.

In a further example, the passage opening can be closable.

The amount of incompressible fluid in the chamber can therefore only be changed when the port is opened. After the amount of incompressible fluid in the chamber has been adjusted, the passage opening can be closed, so that an introduction/extraction device for the incompressible fluid is only in operation when a change in the amount of incompressible fluid in the chamber is to be brought about.

According to a further example, the first wall element and the second wall element can be formed as plates connected to the chamber.

The plates can be stop plates, for example, with which the first wall element or the second wall element can be connected to the vehicle body or the spring element by means of fastening means. This facilitates the connection with the vehicle body or with the spring element, so that installation and maintenance costs can be reduced.

The invention also relates to a system for springing a vehicle, the system having a spring element, a device as described above and an introduction/extraction device for the incompressible fluid, the second wall element being connected to an end piece of the spring element and the passage opening being connected to the input/output device for the incompressible fluid is connected in a fluid-communicating manner.

Advantages and effects as well as further developments of the system result from the advantages and effects as well as further developments of the device described above. In this regard, reference is therefore made to the previous description.

According to one example, the system further comprises a shock absorber element, wherein the spring element and the device are arranged around at least a portion of the shock absorber element.

A set of components consisting of a shock absorber element, a spring element and a device for adjusting a base point of a spring element for a vehicle is thus provided, which is simple in construction, is inexpensive and has a high control speed for vehicle dynamics control.

The invention also relates to a method for adjusting a base point of a spring element for a vehicle using a device or a system as described above, the vehicle having a vehicle body and a wheel suspension pivotably mounted on the vehicle body with a spring element and a sensor for determining an angle between the vehicle body and the wheel suspension, the system or the device and the spring element being arranged between the vehicle body and the wheel suspension, the method comprising the following step: determining an actual angle between the vehicle body and the wheel suspension using the sensor; Determining a target angle between the vehicle body and the wheel suspension; and changing the volume of the chamber by changing an amount of the incompressible fluid in the chamber to adjust the foot point of the spring element, the chamber having a chamber wall with at least one third wall element extending from the first wall element to the second wall element, the mass of which remains constant when the volume of the chamber changes.

The invention thus further provides a rapid control method in order to provide vehicle dynamics control. After determining the actual angle between the vehicle body and the wheel suspension using the sensor and determining a target angle, the volume of the chamber can be changed very quickly using the incompressible fluid. The base point of the spring element can thus be adjusted very quickly in such a way that the desired angle between the wheel suspension and the vehicle body is established. It can also be used to compensate for changes in the actual angle while driving.

Further advantages and effects as well as further developments of the method result from the advantages and effects as well as further developments of the device described above. In this regard, reference is therefore made to the previous description.

• 1 eine schematische Darstellung einer Vorrichtung zum Verstellen eines Fußpunktes eines Federelements für ein Fahrzeug;
• 2a, b eine schematische Schnitt-Darstellung der Vorrichtung mit verschiedenen Volumina in der Kammer;
• 3 eine schematische Darstellung einer Ausführungsform der Vorrichtung;
• 4 eine schematische Darstellung einer weiteren Ausführungsform der Vorrichtung;
• 5 eine schematische Darstellung einer zweiten weiteren Ausführungsform der Vorrichtung;
• 6a-c schematische Darstellungen der Vorrichtung mit verschiedenen Ausführungsformen eines verformbaren Wandelements;
• 7 eine schematische Darstellung des Systems; und
• 8 ein Flussdiagramm des Verfahrens zum Verstellen eines Fußpunktes eines Federelements für ein Fahrzeug.

Further features, details and advantages of the invention result from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. Show it:

• 1 a schematic representation of a device for adjusting a base point of a spring element for a vehicle;
• 2a, b a schematic sectional view of the device with different volumes in the chamber;
• 3 a schematic representation of an embodiment of the device;
• 4 a schematic representation of a further embodiment of the device;
• 5 a schematic representation of a second further embodiment of the device;
• 6a-c schematic representations of the device with different embodiments of a deformable wall element;
• 7 a schematic representation of the system; and
• 8th a flowchart of the method for adjusting a base point of a spring element for a vehicle.

In the following, the device for adjusting a base point of a spring element for a vehicle is denoted in its entirety by reference number 10 .

The device 10 comprises a first wall element 14 for connection to a vehicle and a second wall element 16 for connection to a spring element 12. The first wall element 14 and the second wall element 16 are arranged at a distance from one another. A chamber 18 for changing the distance between the first wall element 14 and the second wall element 16 is arranged between the first wall element 14 and the second wall element 16 . The chamber 18 is connected to the first wall element 14 and the second wall element 16 . The chamber 18 can include the first wall element 14 and the second wall element 16 so that the first wall element 14 and the second wall element 16 can be part of the chamber 18 .

The chamber 18 also has an incompressible fluid 27 . That is, the chamber 18 is filled with the incompressible fluid 27 . The first wall element 14 and/or the second wall element 16 also have a passage opening 20 for the incompressible fluid 27 through which the incompressible fluid 27 can be filled into the chamber 18 or removed from the chamber 18 . The passage opening 20 is thus connected to the chamber 18 in a fluid-communicating manner. Furthermore, the passage opening 20 is designed to be connected to an introduction/extraction device 22 for the incompressible fluid 27 . A valve 21 can be arranged on the passage opening 20 for this purpose.

The incompressible fluid 27 can, for. B. glycol, a glycol-water mixture, brake fluid or a hydraulic steering oil.

A change in a dimension of the chamber 18 between the first wall element 14 and the second wall element 16 causes a change in the distance between the first wall element 14 and the second wall element 16. The distance between the first wall element 14 and the second wall element 16 can be adjusted by means of the chamber 18 be changed by introducing additional incompressible fluid 27 into chamber 18 or removing incompressible fluid 27 from chamber 18 . Changing the amount of incompressible fluid 27 in chamber 18 changes the volume of chamber 18.

the 2a and 2 B show different states of the chamber 18 and the device 10. In 2a chamber 18 has a first volume, while chamber 18 has a 2 B has a second volume smaller than that first volume is . In the 2a and 2 B the chamber 18 thus has a different quantity of incompressible fluid 27 in each case.

The chamber 18 also has a chamber wall 24 which delimits the chamber 18 . The chamber wall 24 has at least one third wall element 25 which extends from the first wall element 14 to the second wall element 16 . The third wall element 25 extends independently of the volume of the chamber 18 from the first wall element 14 to the second wall element 16. The mass of the third wall element 25 is therefore constant. That is, changing the volume of chamber 18 does not cause a substantial change in the surface area of chamber wall 24. Further, to change the volume of chamber 18, no wall member is added or removed from chamber wall 24 that is newly in contact with the volume of the chamber 18 comes or loses contact with the volume, such as. B. when pulling out or pushing in a stamp of a hydraulic chamber. This is also from the 2a and 2 B visible, in which, despite the different volumes, the third wall element 25 has the same mass and extends in both cases from the first wall element 14 to the second wall element 16.

For this purpose, the third wall element 25 can have a deformable wall element that is flexible and has high tensile strength. The deformable wall element extends between the first wall element 14 and the second wall element 16. The deformable wall element forms a bellows which extends between the first wall element 14 and the second wall element 16. In the following exemplary embodiments, the third wall element 25 can each have a deformable wall element.

In this embodiment, the third wall member 25 has a C-shaped cross section and extends annularly about a central axis (not shown). The first wall element 14 and the second wall element 16 close the openings of the ring which is formed from the third wall element 25 . Thereby the chamber 18 is defined. The connection between the third wall element 25 and the first and second wall element 16 can be made by means of a sealing element 26 .

In a first exemplary embodiment, the third wall element 25 can be a fluid-tight fabric. The fluid-tight fabric encloses the incompressible fluid 27 that is arranged in the chamber 18 . The incompressible fluid 27 in the chamber 18 stabilizes the shape of the fluid-tight tissue, so that a distance between the first wall element 14 and in the second wall element 16 also remains constant with a constant volume of the chamber 18 .

In a further exemplary embodiment, the third wall element 25 can be a fabric-reinforced and/or fiber-reinforced membrane. This can be a reinforced elastomer membrane, for example. If the reinforced elastomer membrane is arranged between a spring element 12 and a vehicle body 44 or wheel suspension 46, a force acts on the elastomer membrane, which presses the first wall element and the second wall element 16 towards one another. As a result, the elastomer membrane is deformed (see 2 B) , without a surface area of the elastomer membrane being changed significantly. The introduction of incompressible fluid 27 increases the volume of chamber 18 and also deforms the reinforced elastomeric membrane, with the entire surface area of the reinforced elastomeric membrane remaining constant. Furthermore, a reinforced elastomer membrane is easy and inexpensive to produce.

3 12 shows a further exemplary embodiment of the device 10. The device 10 comprises a toroidal chamber 18. The third wall element 25 can have two deformable wall elements which are arranged opposite one another. One of the two deformable wall elements extends along the outer radius of the torus. The other of the two deformable wall elements 25' extends along the inner radius of the torus.

The two deformable wall elements are each connected to the first wall element 14 and the second wall element 16 with sealing elements 26 .

Furthermore, the first wall element 14 and the second wall element 16 can be ring-shaped. The openings 28, 30 of the rings are arranged on the opening 31 of the torus. A shock absorber element 42 can be guided through these openings 28 , 30 , 31 , so that the device 10 can be arranged around a shock absorber element 42 . Likewise, a spring element 12 can thus be arranged around the shock absorber element 42 . The spring element 12, the shock absorber element 42 and the device 10 can form a system 40, which can be designed as an assembly.

4 shows a further embodiment of the device 10. In this embodiment, the third wall element 25 has at least two wall sections which are connected to one another by means of a sealing element 29 and can be deformable wall elements. There is a Wandab section connected to the first wall element 14 via a sealing element 26 . The wall section 25" is connected to the second wall element 16 via a sealing element 26. The two wall sections define two sub-chambers 18, 18' of the chamber 18. In this way, the maximum distance between the first wall element 14 and the second wall element 16 can easily be increased Effort and without the construction of new components can be increased by means of the already known components for the third wall element 25.

The number of wall sections can also be selected to be greater than two in order to further increase the maximum distance between the first wall element 14 and the second wall element 16 .

5 shows an exemplary combination of the embodiments 3 and 4 . The chamber 18 is designed in the shape of a torus and has two third wall elements 25 lying opposite one another. In this example, both third wall elements 25 each have two wall sections which are connected to one another by means of a sealing element 29 . In each case one of the two wall sections 25'''', 25''''' of a third wall element 25 is connected to the first wall element 14 via a sealing element 26. The other of the two wall sections 25 ″, 25 ″″ of a third wall element 25 is connected to the second wall element 16 via a sealing element 26 .

the 6a until 6c 12 show various embodiments of the chamber 18 and the first and second wall elements 16.

6a FIG. 12 shows a chamber 18 with a deformable wall section which is arranged hanging over a flange of the second wall element 16. FIG. The second wall element 16 is U-shaped and has a receiving geometry 17 for a spring element 12 . A large part of the chamber 18 is formed by a volume enclosed by a flange 13 of the second wall element 16 . When the amount of incompressible fluid 27 in the chamber 18 is increased, the third wall member 25 is stretched between the first wall member 14 and the second wall member 16 until the hanging portion of the third wall member 25 has risen above the second wall member 16. Since the third wall element 25 is not stretchable, the maximum distance between the first wall element 14 and the second wall element 16 is reached.

6b shows a further exemplary embodiment of the device 10, in which the second wall element 16 is formed from a plate in which a receiving geometry 17 for the spring element 12 is formed.

6c shows a further exemplary embodiment of the device 10, in which a receiving geometry 17 for the spring element 12 is provided by a separate component which additionally has a receiving geometry for the second wall element 16 and part of the third wall element 25. This representation also shows fastening means 19 on the first wall element 14, with which the first wall element 14 can be fastened to a vehicle body 44 or a wheel suspension 46.

In 7 a system 40 is shown, which has a spring element 12, a shock absorber element 42 and a device 10 for adjusting a base point of a spring element 12 of a vehicle. Also shown are part of a vehicle body 44 and a wheel suspension 46 with a sensor 48, z. B. a rotation angle sensor. The wheel suspension 46 is pivotably connected to the vehicle body 44 via an axle 50 . The sensor 48 measures the angle between the wheel suspension 46 and the vehicle body 44 on the axle 50. Furthermore, a control unit 52 can receive signals from the sensor 48 in order to determine the angle between the wheel suspension 46 and the vehicle body 44.

The spring element 12 and the shock absorber element 42 are arranged between the vehicle body 44 and the wheel suspension 46 . The device 10 is arranged between the vehicle body 44 and the spring element 12 and/or between the spring element 12 and the wheel suspension 46 . When the spring element 12 is compressed, the distance between the wheel suspension 46 and the vehicle body 44 can be changed by means of the device 10 . At the same time, the angle between the wheel suspension 46 and the vehicle body 44 is also changed.

The change in distance by means of the device 10 is brought about by introducing or removing incompressible fluid 27 into the device 10 . For this purpose, an introduction/extraction device 22 is provided, which can introduce or expel the incompressible fluid 27 into the chamber 18 of the device 10 . The delivery/delivery device 22 can be, for example, a pump for the incompressible fluid. In addition, the insertion/extraction device 22 is connected to the control unit 52 so that the control unit 52 can transmit control signals to the insertion/extraction device 22 .

The control unit 52 can use the method 100 for adjusting a base point of a Use spring element 12 for a vehicle. According to the method 100, an actual angle between the vehicle body 44 and the lower suspension is determined by means of the sensor 48 in a first step 102. In a further step 104, the control unit 52 also determines a target angle between the vehicle body 44 and the wheel suspension 46. In order to regulate the actual angle to the target angle, the control unit 52 transmits control signals to the insertion/extraction device 22 which changes the volume of the chamber 18 in a step 106 by changing an amount of the incompressible fluid 27 in the chamber 18 . The base point of the spring element 12 is adjusted, with the chamber 18 having a chamber wall 24 with at least one third wall element 25 extending from the first wall element 14 to the second wall element 16, the mass of which remains constant when the volume of the chamber 18 changes.

The invention is not limited to one of the embodiments described above, but can be modified in many ways.

All of the features and advantages resulting from the claims, the description and the drawing, including structural details, spatial arrangements and method steps, can be essential to the invention both on their own and in a wide variety of combinations.

Claims (14)

Device for adjusting a foot point of a spring element (12) for a vehicle, the device (10) comprising a first wall element (14) for connection to a vehicle, a second wall element arranged at a distance from the first wall element (14) for connection to the spring element (12), and a chamber (18) arranged between the first wall element (14) and the second wall element (16) for changing the distance between the first wall element (14) and the second wall element (16) by means of a change in a volume of the chamber (18), wherein the chamber (18) has an incompressible fluid (27) and the first and/or second wall element (16) comprises a passage opening (20) for the incompressible fluid (27) to the chamber (18), the passage opening (20) can be connected in fluid communication with an input/output device (22) for the incompressible fluid (27) to change the volume of the chamber (18), and wherein the chamber (18) has a chamber wall (24) with at least one has a third wall element (25) extending from the first wall element (14) to the second wall element (16), the mass of which is constant when the volume of the chamber (18) changes, characterized in that the third wall element (25) has a has a part which is arranged hanging over a flange (13) of the second wall element (16), the third wall element (25) being able to be clamped between the first wall element (14) and the second wall element (16) when the quantity of the incompressible fluid (27) in the chamber (18) is increased. device after claim 1 , characterized in that the chamber wall (24) comprises the first wall element (14) and the second wall element (16). device after claim 1 or 2 , characterized in that the third wall element (25) has at least one deformable wall element which is flexible and tensile and extends between the first wall element (14) and the second wall element (16). Device according to one of Claims 1 until 3 , characterized in that the third wall element (25) is connected to the first wall element (14) and the second wall element (16) by means of a sealing element (26). Device according to one of Claims 1 until 4 , characterized in that the third wall element (25) has a fluid-tight fabric or a fabric and / or fiber-reinforced membrane. Device according to one of Claims 1 until 5 , characterized in that the third wall element (25) has two deformable wall elements arranged opposite one another. Device according to one of Claims 1 until 6 , characterized in that the third wall element (25) has at least two wall sections, wherein the at least two wall sections are connected to one another by means of a sealing element (26). Device according to one of Claims 1 until 7 , characterized in that the chamber (18) is toroidal. device after claim 8 , characterized in that the first wall element (14) and the second wall element (16) are annular. Device according to one of Claims 1 until 9 , characterized in that the passage opening (20) can be closed. Device according to one of Claims 1 until 10 , characterized in that the first wall element (14) and the second wall element (16) are designed as panels. System for springing a vehicle, the system (40) having a spring element (12), a device (10) according to any one of the preceding claims and an introduction/extraction device (22) for the incompressible fluid (27), the second wall element (16) is connected to an end piece of the spring element (12) and the passage opening (20) is connected in fluid communication with the introduction/discharge device (22) for the incompressible fluid (27). system after claim 12 , characterized in that the system (40) further comprises a shock absorber element (42), wherein the spring element (12) and the device (10) are arranged around at least a portion of the shock absorber element (42). Method for adjusting a base point of a spring element for a vehicle by means of a device or a system according to one of the preceding claims, the vehicle having a vehicle body and a wheel suspension pivotably mounted on the vehicle body with a spring element and a sensor for determining an angle between the vehicle body and the Wheel suspension, wherein the system or the device and the spring element are arranged between the vehicle body and the wheel suspension, the method (100) comprising the following step: - Determining (102) an actual angle between the vehicle body and the wheel suspension by means of the sensor; - Determining (104) a desired angle between the vehicle body and the wheel suspension; and - Changing (106) the volume of the chamber by changing a quantity of the incompressible fluid in the chamber for adjusting the base point of the spring element.

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