WO2013057020A1

WO2013057020A1 - Elastic air spring piston bearing

Info

Publication number: WO2013057020A1
Application number: PCT/EP2012/070045
Authority: WO
Inventors: Thomas Eike; Andreas Kind; Reiner Waschk; Ingo Tetzlaff
Original assignee: Continental Teves Ag & Co. Ohg
Priority date: 2011-10-18
Filing date: 2012-10-10
Publication date: 2013-04-25
Also published as: DE102011084665A1

Abstract

The invention relates to an air spring strut (100) for a vehicle, comprising: a bearing body (106), a bearing body mount (108), and an air spring rolling piston (104), wherein the air spring rolling piston (104) is elastically supported by the bearing body (106), said bearing body (106) being elastically deformable and containing polyurethane foam (122).

Description

Elastic air spring piston bearing

The invention relates to an air spring strut for a vehicle.

With air spring damper connections, in which an air spring is arranged on a shock absorber, measures are to

acoustic insulation of the shock absorber over the

Vehicle body necessary. This is typically achieved by head bearings, dome decoupling or the like. Also known is the design with a

Swash bearing (DE19508980C2, DE19908607B4), which also offers a certain acoustic decoupling in addition to a tumbling motion of the piston. However, this wobbling motion leads only in limited applications to the desired reduction of the noise level.

Further types of air spring struts for a vehicle are the following publications: DE 103 20 501 AI, DE 195 08 980 C1, DE 198 02 703 AI, DE 199 08 607 AI, DE 10 2004 002 432 AI, DE 10 2009 003 476 AI, FR 2 728 948 AI. Cellular elastomers based on polyurethane are particularly suitable for acoustic decoupling of components in the chassis area

(e.g., Cellasto Fa. BASF). Typical applications of this

Materials are additional springs, head bearings and decouplers

(for example between steel springs and vehicle connection).

The arrangement of a decoupling zw strut and

Vehicle connection is relatively expensive, as train and

Printing direction must be decoupled separately, it will also this additional space required.

In contrast, the invention has the object, an improved air spring strut for a vehicle and a

improved system of an air spring strut and a

Vehicle connection of a vehicle to create.

The object underlying the invention is achieved in each case with the features of the independent claim.

Preferred embodiments of the invention are in the

specified dependent claims.

An air spring strut for a vehicle is provided comprising:

a bearing body,

a bearing body holder,

an air spring roll-off piston,

wherein the Luftfederabrollkolben by the bearing body

is elastically mounted, wherein the bearing body is elastically deformable and polyurethane foam includes.

Polyurethane foam generally ensures a good

Thermal and / or sound insulation of buildings and vehicles. The elastomer polyurethane of the deformable bearing body could thus advantageously contribute to the enhancement of the effect of acoustic decoupling (rattle protection). Becomes For example, a deformable bearing body made of polyurethane foam between the wheel end of the

Luftfederabrollkolbens and a projecting step-shaped shoulder of the bearing body holder arranged so is the

Structure-borne noise, which occurs when the Luftfederabrollkolbens impact on the shoulder surface of the bearing body holder, largely absorbed. The noise level is reduced considerably.

Polyurethane also shows a high wear resistance, which proves to be very advantageous in continuous operation of Luftfederabrollkolbens. In sandwich elements, which could also be an embodiment of the bearing body, polyurethane foam proves to be an ideal insulating and insulating layer. Polyurethane is also lighter and more cold-elastic than e.g. Rubber. Polyurethane provides electrical insulation and protection against aggressive environmental conditions (chemical, temperature,

Vibrations, mechanical). Polyurethane insulated against cold, resulting in low-pressure operation of the air spring strut

Temperatures in the cold season proves to be another advantage. In addition, polyurethane foam ensures a good sealing function.

By foaming the polyurethane with different concentrations of water, the material properties of each polyurethane foam can be varied and the

be adapted to the respective necessary conditions. In the production of polyurethane foam, the shape of the

elastic bearing body to the respective structural

Requirements are adjusted. Besides, others can

Materials, such as stabilizing solid-state intermediate discs, are integrated in the production of an elastic bearing body and thus produce in combination more positive for the elastic storage of Luftfederabrollkolbens an air spring leg material properties. According to one embodiment of the invention, the air spring strut further comprises a shock absorber tube, wherein the

Bearing body at one end of Luftfederabrollkolbens

is arranged, wherein the bearing body holder is fixedly secured to the shock absorber tube,

wherein the Luftfederabrollkolben relative to the

Bearing body holder is movable in two opposite directions parallel to the axis of the air spring strut,

wherein the bearing body holder has on the chassis side a first groove on a cylinder outer side facing away from the shock absorber tube, wherein the first groove is adapted to receive a first sealing element, which is adapted to a pneumatic spring internal pressure against an external environment

seal, and arranged so that the

Luftfederabrollkolben is spaced from the bearing body holder.

The arrangement of the elastically deformable bearing body at one end of the Luftfederabrollkolbens is advantageous because relatively small movements of the shock absorber tube are cushioned by the bearing body.

In the described arrangement, the bearing body holder by at least one sealing element to the outside of the

Fuselage tube fixed. Depending on the size and thickness of the sealing element, e.g. an O-ring, the distance between the Luftfederabrollkolben and the

Bearing body holder can be varied. If one chooses such a thickness of the sealing element that a distance between the

Air spring rolling piston and the bearing body holder is created, the friction between the two components can be reduced and thus the suspension system by the elastic

deformable bearing body in his sensitivity can be increased even more. By the elastically deformable Bearing body can be cushioned also smaller movements, which are introduced by the wheel via the axle into the strut and movements of the shock absorber relative to the body

cause, which can not be cushioned by the air spring bellows.

According to one embodiment of the invention, the

Bearing body support on the wheel side at least one second groove, which is adapted to receive at least a second sealing element, wherein the first and the at least second groove are spaced in the direction of rolling movement.

This may have the advantage that the operation of the first sealing element is reinforced and at the same time

Luftfederabrollkolben in its motion control at the

Rolling movement is even more stabilized. The wheel and chassis directed movement of Luftfederabrollkolbens is made even easier, whereby the Abfederungsfunktionalität the elastically deformable bearing body, which is located at one end of the Luftfederabrollkolbens, in their

Sensitivity is increased even more. Due to the elastically deformable bearing body now smallest movements can be optimally cushioned, which are initiated by the wheel over the axis in the strut and cause movement of the shock absorber relative to the body, which, however, not by the

Air bellows can be cushioned.

According to one embodiment of the invention, the first and the at least second groove are formed so that the inserted first and second sealing element protrude from the bearing body holder, so that a distance between the

Bearing body holder and the Luftfederabrollkolben arises.

This means that the bearing body holder and the

Luftfederabrollkolben only on the relief-like projecting sealing elements, such as O-rings, each have a direct point of contact. This may have the advantage that the friction surface between the bearing body holder and the Luftfederabrollkolben is significantly reduced in the relative movement between these two components. Due to the reduced friction between these two components, the noise during the rolling motion is thus significantly reduced. It comes to an acoustic decoupling.

According to one embodiment of the invention, the first and the second sealing element are axially biased and / or consist of an elastomer.

The acoustic decoupling of the described arrangement in the strut is thus under constant bias, i. both during a movement of Luftfederabrollkolbens in the pulling direction and in the printing direction. Because the acoustic decoupling in the described arrangement is based on annular

Decoupling components (O-rings) with radially the

Strut axle directed forces. This may have the advantage that a separate decoupling in the pulling direction and a separate decoupling in the printing direction - as it is done in the prior art - is no longer necessary. An additional space, as previously required for a separate decoupling in the pulling direction and a separate decoupling in the printing direction, is thus no longer necessary in the described arrangement for an air spring strut.

In addition, by the biased sealing elements with centrally directed forces, a tumbling motion of the shock absorber tube concentrically arranged components

prevented and the motion control of the individual components stabilized. The fact that the sealing elements are made of an elastomer, may have the advantage that the noise, which only takes place at the on the sealing elements, such as O-rings

Friction between the Luftfederabrollkolben and the

Sealing elements can arise, even being reduced again. If one uses e.g. The elastomer rubber as a material for the sealing elements, so rubber can contribute to a

efficiently dampening the resulting sound. A targeted

Choice of material can enhance the effect of acoustic decoupling.

According to one embodiment, the Luftfederabrollkolben on its the shock absorber tube surface facing at least one groove which is adapted to receive a sealing element, which is adapted to the

Air spring internal pressure against the external environment

seal.

This may have the advantage that other constructions of the air spring strut, in which a relative movement between the Luftfederabrollkolben and the bearing body holder is converted to another technical design, can be realized, wherein by means of at least one sealing element, the air spring interior is sealed against the atmosphere. Again, the sealing element may e.g. represent an O-ring.

According to one embodiment of the invention, the bearing body has a stepped shape, so that a form-fitting

Connection between the Luftfederabrollkolben and the

Bearing body is formed, wherein the positive connection between the bearing body and the Luftfederabrollkolben is formed so that the bearing body has direct contact with the bearing body holder and the Luftfederabrollkolben has no direct contact with the bearing body holder. The bearing body thus forms a small step into which the air spring roll-off piston is "keyed" in a key-shaped manner

Motion control of Luftfederabrollkolbens achieved.

From this arrangement results in a constant spacing of the Luftfederabrollkolbens of the bearing body in all upward and downward movements of Luftfederabrollkolbens. This can have the advantage that in this embodiment too

Friction surface between the bearing body and the

Luftfederabrollkolben is significantly reduced, whereby the noise is again drastically reduced in a relative movement of these two components to each other.

Again, there is an acoustic decoupling.

According to one embodiment of the invention, the elastically deformable bearing body at the wheel end of the

Luftfederabrollkolbens or on chassisseitigen end of

Air spring roll piston arranged.

In one embodiment, the elastic bearing body can thus be arranged at the wheel end of the Luftfederabrollkolbens ("standing piston"). In another embodiment, the elastic bearing body can also be arranged at the chassisseitigen end of Luftfederabrollkolbens ("hanging

Piston") .

This can have the advantage that a certain flexibility is given in the actual construction of an air spring strut. Depending on the selected arrangement and embodiment of the other components of an air spring strut for a vehicle, the wheel-side or the chassis-side arrangement of the elastic bearing body may prove to be more advantageous. According to one embodiment of the invention, the bearing body between the wheel-side end of Luftfederabrollkolbens and the chassisseitigen end of the bearing body holder is arranged, wherein the bearing body further spaced apart, embedded in the polyurethane foam solid intermediate disks, wherein the polyurethane foam the

Solid-state washers on their chassis-side and wheel-side surfaces and on the bumper tube

encloses facing side.

This can have the advantage that a relative movement

between the chassis-side Luftfederabrollkolben and the wheel-side bearing body holder by the elastic

deformable bearing body is cushioned.

The solid-state disks give the bearing body a certain stability and shape. The polyurethane foam gives the bearing body elasticity. By a parallel arrangement of the solid-state intermediate disks, for example, perpendicular to the axis of the shock absorber tube is at the same time a direction of deformation of the elastic bearing body

given, namely in this example, primarily in the direction of the axis of the shock absorber tube, ie in the direction of the chassis and radseitig oriented relative movement between the

Air spring rolling piston and the bearing body holder.

According to one embodiment of the invention, the

Solid interstices firmly adhering to the polyurethane foam, physically and / or chemically bonded.

This may have the advantage that caused by the up and down movement of Luftfederabrollkolbens

Dilatation or compression of the elastic bearing body made of polyurethane foam, the solid state washers are not pushed out of the polyurethane foam. According to one embodiment of the invention, the air spring strut comprises a rolling bellows, wherein the rolling bellows on

chassisseitigen end of the bearing body and at the

Shock absorber tube facing away from the surface

Is arranged Luftfederabrollkolbens, and is adapted to seal the air spring internal pressure against the external environment.

The rolling bellows advantageously encloses the

Air spring rolling piston. Another advantage of using a rolling bellows is its universal compatibility with

different Luftfederabrollkolben.

According to one embodiment of the invention, the bearing body, which contains polyurethane foam, further designed to seal even the air spring internal pressure against the external environment.

This may have the advantage of being limited to other components for sealing, e.g. Sealing elements can be dispensed with.

It can advantageously different

Embodiments of air spring bellows for sealing the

Air spring internal pressure are used against the external environment: rolling bellows, bellows and their lower forms

(cylindrical and conical bellows, one-, two-,

Three-bellows, rolling bellows with double-sided sealing cones etc.).

The elastic mounting of the Luftfederabrollkolbens by means of a bearing body made of polyurethane foam thus proves to be combined with a variety of possible

Embodiments for sealing the air spring internal pressure against the external environment. In a further aspect, the invention relates to a system of an air spring strut according to one of the preceding claims and a vehicle connection of a vehicle, wherein the

Air spring leg is designed for suspension of a wheel or an axle of the vehicle.

In a further aspect, the invention relates to a system according to any one of the preceding claims, wherein the

Air strut and the vehicle connection in both opposite directions of a relative movement between the

Luftfederabrollkolben and the bearing body holder are acoustically decoupled.

In the following, preferred embodiments of the invention are explained in more detail with reference to the following drawings.

1 shows a schematic view of a cross section through a part of an air spring strut, wherein the bearing body support has a groove with a sealing element on the chassis and wheel side,

FIG. 2 shows a schematic view of a cross section through part of an air spring strut, wherein the bearing body support has a groove with a sealing element on the chassis side and a shoulder on the wheel side of the bearing body,

Figure 3 Rollbalgausführung the air spring strut, wherein the

Bearing body made of polyurethane foam and embedded therein, parallel and spaced solid washers exists. FIG. 1 shows a schematic view of a cross section through an air spring strut (100). The strut comprises an air spring bellows 102, a Luftfederabrollkolben 104, a bearing body 106, a bearing body holder 108, a

Damping cylinder 110 and an external guide.

In the air spring bellows 102, such a high prevails during operation

Pressure that the weight of the vehicle is supported by the air spring strut 100. At a cushioning of such a movement of the air spring bellows 102 rolls on the Luftfederabrollkolben 104 from. Smaller movements of the shock absorber tube through the

elastically deformable bearing body 106 cushioned. Of the

elastically deformable bearing body 106 is particularly suitable for cushioning such small movements, since the elastically deformable bearing body 106 is configured relatively soft springy. Therefore, the strut 100 is particularly well suited for cushioning small movements that are initiated by the wheel via the axle into the strut and cause movements of the strut relative to the body.

For example, if the wheel or axle is moved down, the damper tube 110 will move relative to

Shock absorber down. As long as the movement is small enough, such movement is cushioned by the elastically deformable bearing body 106 and not to the vehicle

transfer. The same applies vice versa for a movement of the wheel or the axle upwards, which causes a movement of the wheel

Damper tube 110 relative to the shock absorber has upwards. Greater movements of the wheel or axle are cushioned by the air spring bellows 102, which rolls on the Luftfederabrollkolben 104.

Due to the fact that the bearing body mount 108 has a groove 112, 114 with a sealing element 116, 118 on the chassis and wheel side, depending on the thickness of the sealing elements 116 and 118, a distance 120 between the bearing body holder 108 and the Luftfederabrollkolben 104 are created, whereby the friction surface between the Luftfederabrollkolben 104 and the bearing body holder 108 is substantially reduced. The relative movement between the Luftfederabrollkolben 104 and the bearing body holder 108 is thus facilitated because the adhesion resistance is lowered. By suitable combination of materials with a low coefficient of friction, the friction even between the Luftfederabrollkolben 104 and the remaining direct contact points on the

Sealing elements 116 and 118 are reduced. The sensitivity of the suspension of small movements of the shock absorber tube 110 relative to the shock absorber is thus increased. Smallest movements of the shock absorber tube 110 relative to the shock absorber can now also be cushioned.

The described arrangement for the realization of a

Air strut is also suitable for the acoustic decoupling of components in the chassis area. Acoustic noises are usually transmitted through small movements. These small movements are cushioned by the elastically deformable bearing body 106 and not forwarded to the vehicle body.

The two sealing elements 116 and 118 can be made

sound insulating material, such as Rubber exist, whereby a possible noise can be significantly reduced. Also, the elastically deformable bearing body 106 may consist of sound-insulating material such as polyurethane and

Noises that occur during the up and down movement of the

Luftfederabrollkolbens arise, largely absorb. The described arrangement of an air spring strut thus provides an acoustic decoupling. In the described arrangement is a separate acoustic decoupling in the pulling direction and a separate decoupling in the printing direction not required. An additional space is therefore not necessary.

By a suitable combination of materials of the material of Luftfederabrollkolbens and the material of the sealing element, a minimization of the coefficient of friction is possible.

This can have the advantage that the friction between the Luftfederabrollkolben and the bearing body attitude is minimized even in their direct points of contact in the sealing elements. For example, by a

Material combination such as aluminum and polytetrafluoroethylene or by using an elastomer such as rubber very low coefficients of friction can be achieved.

FIG. 2 shows a schematic view of a cross section through an air spring leg 100, wherein the bearing body support 108 has a groove 112 with sealing element 116 on the chassis side and an elastically deformable bearing body 106 positioned at the wheel end of the air spring rolling piston 104 is shaped such that a "precisely fitting tilting" of Bearing body 106 and Luftfederabrollkolben 104. In this case, a distance 120 between the bearing body holder 108 and the Luftfederabrollkolben 104 is generated by the thickness of the

Sealing element 116 is selected so that the sealing element 116 in relief facing away from the shock absorber tube 110

Outer protrudes, and the step of the bearing body 106 and the wheel-side end of Luftfederabrollkolbens 104 are shaped so that the Luftfederabrollkolben 106 only by maintaining a distance to the bearing body holder 108 in the

Stepped bearing body 106 "fits".

In another embodiment (not shown here), the elastically deformable bearing body 106 can also be arranged on the chassis-side end of the air spring roll-off piston 104 ("hanging piston") of the "standing piston", in which - as already described above - the elastically deformable bearing body 106 is disposed at the wheel end of the Luftfederabrollkolbens 104.

These two embodiments with only one

The chassis-side sealing element 116 in a chassis-side groove 112 of the bearing body holder 108 and an elastically deformable bearing body 106 arranged on the wheel-side end or on the chassis-side end of the air spring rolling piston 104 are like the embodiment described with two in FIG

Sealing elements 116 and 118, which are spaced in the direction of rolling movement, - suitable to absorb the smallest movements of the damping cylinder 110 relative to the shock absorber.

The embodiments with only one chassis side

Sealing element 116 in a chassis-side groove 112 of the

Bearing body holder 108 and one at the wheel end or at the chassis side end of Luftfederabrollkolbens 104th

arranged elastically deformable bearing body 106 are also for acoustic decoupling of components in

Chassis area suitable, since they have substantially the same functionalities and effects as shown in Fig. 1 and already described above embodiment with two sealing elements 116 and 118, in the direction

Abrollbewegung are spaced. Again, by reducing the friction surface between the

Luftfederabrollkolben 104 and the bearing body holder 108, by further reducing the friction by means of suitable material pairing of the materials of Luftfederabrollkolben and the remaining direct contact point on the

preloaded sealing element 116 with low

Friction coefficient, and by a sound absorption by the elastically deformable bearing body 106 made of polyurethane foam causes an acoustic decoupling of the components. Even with the latter two embodiments is thus a separate acoustic decoupling in tensile direction and a separate

Decoupling in printing direction not required. One

additional space is not necessary here.

FIG. 3 shows an air spring strut 100 with a rolling bellows 122, wherein the bearing body 106 consists of polyurethane foam 122 and solid intermediate disks 124 embedded therein. The solid-state intermediate disks 124 are firmly adhering,

physically and / or chemically bonded to polyurethane foam 122. The solid-state intermediate disks 124 are parallel and spaced apart from each other, that is to say sandwiched, their upper and lower sides, in the rest position, being directed perpendicular to the axis of the shock absorber pipe 110. The

Solid intermediate disks 124 give the bearing body 106 a certain stability and shape. The polyurethane foam 122

gives the bearing body 106 elasticity. Due to the parallel arrangement of the solid-state disks 124 perpendicular to the axis of the shock absorber tube 110, the direction of deformation of the elastic bearing body 106 is predetermined at the same time, namely primarily in the direction of the axis of the shock absorber tube 110, ie in the direction of the relative movement between the Luftfederabrollkolben 104 and the bearing body holder 108th

In this embodiment, the bearing body 106 acts as a spring between the wheel-side bearing body holder 108 and the chassisseitigen Luftfederabrollkolben 104. Der

Luftfederabrollkolben 104 is thus highly resiliently mounted and can absorb relative movements between the Luftfederabrollkolben 104 and the bearing body holder 108 efficiently.

Due to the material properties of the polyurethane foam at the same time the relative movement between the

Luftfederabrollkolben 104 and the bearing body holder 108 acoustically decoupled. Reference sign list

100 air strut

102 air bag

104 Air spring roll off piston

106 bearing body

108 bearing body holder

110 shock absorbers (pipe)

112 First groove

114 Second groove

116 First sealing element

118 Second sealing element

120 Distance between bearing body bracket

Luftfederabrollkolben

122 polyurethane foam

124 solid-state disks

126 rolling bellows

Claims

An air spring strut (100) for a vehicle, comprising:

a bearing body (106),

a bearing body holder (108),

an air spring roll-off piston (104),

wherein the Luftfederabrollkolben (104) is elastically supported by the bearing body (106), wherein the bearing body (106) is elastically deformable and polyurethane foam (122)

includes.

2. air spring strut (100) according to claim 1, further comprising a

Shock absorber tube, wherein the bearing body (106) is disposed at one end of the Luftfederabrollkolbens (104), wherein the bearing body holder (108) is fixedly secured to the shock absorber tube (110),

wherein the Luftfederabrollkolben (104) relative to the

Bearing body holder (108) in two opposite directions parallel to the axis of the air spring strut (100) is movable,

wherein the bearing body support (108) has a first groove (112) on the chassis side of the shock absorber tube (110).

the cylinder outer side facing away from, wherein the first groove (112) is adapted to receive a first sealing element (116) which is adapted to a

Air spring internal pressure against an external environment

seal, and arranged so that the

Luftfederabrollkolben (104) from the bearing body holder (108) is spaced.

3. air spring strut (100) according to claims 1 and 2, wherein the bearing body holder (108) on the wheel side at least one second groove (114) which is adapted to at least one receiving second sealing element (118), wherein the first and the at least second groove (114) are spaced in the direction of rolling movement.

4. air spring strut (100) according to any one of the preceding claims, wherein the first and the at least second groove (114) are formed so that the inserted first and second sealing element (116, 118) protrude from the bearing body holder (108), so that a Distance (120) between the

Bearing body holder (108) and the Luftfederabrollkolben (104) is formed.

5. air spring strut (100) according to any one of the preceding claims, wherein the first and the second sealing element (116, 118) are axially biased and / or consist of an elastomer.

6. air spring strut, wherein the Luftfederabrollkolben has on its the shock absorber tube facing surface at least one groove which is adapted to a sealing element

absorb, which is adapted to the

Air spring internal pressure against the external environment

seal.

7. air spring strut (100) according to claim 1 and 2, wherein the

Bearing body (106) has a stepped shape, so that a positive connection between the

Luftfederabrollkolben (104) and the bearing body (106) is formed, wherein the positive connection between the bearing body (106) and the Luftfederabrollkolben (104) is formed so that the bearing body (106) has direct contact with the bearing body holder (108) and the

Luftfederabrollkolben (104) has no direct contact with the bearing body holder (108).

8. air spring strut (100) according to any one of the preceding claims, wherein the elastically deformable bearing body (106) on

Radseitigen end of Luftfederabrollkolbens or am

Chassisseitigen end of Luftfederabrollkolbens is arranged.

9. air spring strut (100) according to claim 1, wherein the bearing body (106) between the wheel end of the

Luftfederabrollkolbens (104) and the choke-side end of the bearing body holder (108) is arranged, wherein the bearing body (106) farther apart, embedded in the polyurethane foam (122)

Solid intermediate disks (124), wherein the

Polyurethane foam (122) encloses the solid-state intermediate disks (124) on their chassis-side and wheel-side surfaces and on the side facing the shock absorber pipe (110).

10. air spring strut (100) according to claim 9, wherein the

Solid intermediate disks (124) with the polyurethane foam (122) firmly adhering, physically and / or chemically connected.

11. Air spring strut (100) according to claim 9, further comprising

a rolling bellows (126), wherein the rolling bellows (126) on

chassisseitigen end of the bearing body (106) and on the shock absorber tube (110) facing away from the surface of the

Luftfederabrollkolbens (104) is arranged, and is adapted to seal the air spring internal pressure against the external environment.

12. Air strut (100) according to one of the preceding

Claims, wherein the bearing body, which contains polyurethane foam is further adapted to even the

Air spring internal pressure against the external environment

seal.

13. A system of an air spring strut (100) according to one of the preceding claims and a vehicle connection of a vehicle, wherein the air spring strut (100) is designed for suspension of a wheel or an axle of the vehicle.

14. The system of claim 13, wherein the air spring strut (100) and the vehicle connection in both opposite directions of a relative movement between the Luftfederabrollkolben (104) and the bearing body holder (108) acoustically

are decoupled.