BUMPER ASSEMBLY FOR A MOTOR VEHICLE

Description

[0001] The invention relates to a bumper arrangement for a motor vehicle with a cross member and first deformation elements in the form of crash boxes, wherein a second deformation element is provided laterally next to at least one first deformation element.

[0002] Bumper assemblies are installed at the front and rear of motor vehicles to absorb the impact energy from collisions and minimize damage to the vehicle's supporting structure. Bumper assemblies are also intended to help minimize injuries to pedestrians and cyclists. A bumper assembly consists of a cross member that can be fixed transversely to the longitudinal members of the vehicle frame by incorporating deformation elements in the form of crash boxes. The cross member serves to transfer the energy resulting from an impact into the crash boxes, where the impact energy is converted into deformation work. The bumper assembly is coordinated so that the crash boxes are positioned as centrally as possible on the longitudinal members of the vehicle and the impact energy is transferred via the cross members into the crash boxes and thus also into the trailing arms with the lowest possible bending moment.

[0003] In the bumper assembly known from DE 10 2008 039 513 A1, additional deformation elements in the form of support elements are arranged in the area of ​​the outer end sections of the cross member between the ends and the longitudinal member-side flange plates of the crash boxes. Both the cross member and the support elements are made of extruded profiles.

[0004] CN 112 519 710 A discloses a bumper assembly for a motor vehicle with a cross member and first deformation elements in the form of crash boxes, which corresponds to the preamble of claim 1, wherein a second deformation element is provided laterally next to at least one first deformation element. The second deformation element is an extruded profile, the extruded profile being oriented with its extrusion direction in the z-axis (vertical axis of the vehicle) of the motor vehicle.

[0005] A bumper arrangement for a motor vehicle with a cross member and support elements which are formed from extruded profiles is further disclosed in DE 10 2008 039 513 A1.

[0006] JP 2008 213739 A discloses a bumper reinforcement which is attached to an end face of a cross member.

[0007] US 8,608,231 B1 discloses a vehicle structural frame with an overlap barrier impact deformation scheme, the frame comprising a rail, a first energy absorption device, and a connector, the connector extending between the rail and the first energy absorption device. US 2014 / 203578 A1 discloses a motor vehicle bumper assembly according to the preamble of claim 1.

[0008] Bumper assemblies must meet legal regulations as well as the pedestrian protection requirements set by consumer protection organizations. In addition to good crash performance, manufacturers are required to maximize the available installation space and provide vehicle bumper assemblies with advantageous weight characteristics. These targets must simultaneously be consistent with the high demands placed on a vehicle's safety structure. Strict safety regulations must be met, which are verified through crash tests, such as the so-called pole test for small overlap load cases.

[0009] Based on the prior art, the invention is based on the object of demonstrating a motor vehicle bumper arrangement which is advantageous in terms of manufacturing technology and weight, with efficient energy absorption capacity even in the case of only one-sided or unfavourable load effects in the event of an accident configuration in which the bumper arrangement is hit with only a small overlap, for example by another vehicle or a fixed obstacle.

[0010] The solution to this problem is shown in claim 1.

[0011] Advantageous embodiments and further developments of the bumper arrangements according to the invention are the subject of the dependent claims.

[0012] Embodiments and modifications of features of the motor vehicle bumper arrangement, which individually or in combination make the bumper arrangement functionally and technologically advantageous, also emerge from the description and the attached drawings.

[0013] The second deformation element is an extruded profile. The extruded profile is cut to the required length from a profile strand produced by extrusion. The profile strand has an extrusion direction extending in its longitudinal direction. The extrusion direction is the direction in which the profile strand was extruded or pressed.

[0014] The extruded profile is oriented in the bumper assembly with its extrusion direction along the z-axis (vehicle vertical axis) of the vehicle. Oriented means that the extrusion direction extends along the z-axis. Preferably, the extrusion direction extends vertically along the vehicle vertical axis, whereby both tolerance-related deviations and inclinations of ± 10 degrees relative to the z-axis are possible.

[0015] The second deformation element has an inner side wall and an outer side wall. The inner side wall and the outer side wall extend parallel to the side walls of the crash box. The inner side wall and the outer side wall are connected to each other via at least one transverse web.

[0016] Relative to the vehicle's centerline, the inner sidewall is directed toward the vehicle's centerline or is located on the side closest to the vehicle's centerline. The outer sidewall is directed away from the vehicle's centerline or is located on the side outside the vehicle's centerline.

[0017] The extruded profile is preferably made of light metal or light metal alloys, especially aluminum or aluminum alloys. Complex shapes tailored to the intended use are possible. The extruded profile is designed for use as a second deformation element in terms of its material and geometric shape.

[0018] The first deformation elements are crash boxes, which are integrated between the cross member and a longitudinal member of the vehicle. The first deformation elements are the main crash boxes of the bumper assembly. The second deformation elements function as auxiliary crash boxes.

[0019] The second deformation elements are offset outwards towards the free end of the cross member and arranged at a distance next to a first deformation element or a crash box.

[0020] The extruded profile has an extrusion direction determined by the extrusion process. According to the invention, the extruded profile is oriented along the z-axis (vehicle vertical axis) of the motor vehicle.

[0021] A vehicle coordinate system is a three-dimensional Cartesian coordinate system used to identify the axes within a motor vehicle. The x- and y-axes lie in a horizontal plane (= vehicle plane). The x-axis corresponds to the vehicle's longitudinal axis, the y-axis corresponds to the vehicle's transverse axis, and the z-axis corresponds to the vehicle's vertical axis.

[0022] Terms such as transverse and longitudinal, top and bottom, horizontal and vertical or longitudinal and transverse direction as well as top and bottom each refer to the installation position of the bumper arrangement in a motor vehicle.

[0023] The extruded profile has side walls connected by crossbars. When installed, the side walls and crossbars enclose a hollow chamber that is open at the top and bottom.

[0024] Preferably, the inner side wall and the outer side wall of an extruded profile are connected via two transverse webs. One transverse web is arranged close to the vehicle, and a second transverse web is arranged close to the cross member. "Close to the vehicle" means that the transverse web is arranged on the section of the second deformation element facing the longitudinal member. "Close to the cross member" means that the transverse web is arranged on the end of the second deformation element facing the cross member.

[0025] Relative to the x-axis (vehicle longitudinal axis), the crossbar near the cross member is a front crossbar of the extruded profile and the crossbar near the vehicle is a rear crossbar of the extruded profile.

[0026] Since the extruded profiles are separated from a profile strand, the cross bars have a height that corresponds to the height of the outer side wall and the inner side wall.

[0027] The extruded profile preferably has at least one hollow chamber. Due to the manufacturing process of the profile strand from which the individual extruded profiles are cut, the hollow chamber has a predetermined direction. This direction is referred to as the extrusion direction. The extrusion direction is maintained even if the extruded profile is mechanically processed, for example, bent, in certain areas after extrusion.

[0028] The extruded profile has one or more hollow chambers, wherein the hollow chamber or chambers are open at the bottom and top of the extruded profile.

[0029] According to the invention, at least one wall section of the extruded profile has a desired deformation element and / or an expansion compensation element.

[0030] The desired deformation element and / or expansion compensation element can be formed by shaping the wall section or by mechanical processing. For example, a desired deformation element, like an expansion compensation element, can be formed by beads, constrictions, folds, bends, or waves in the wall section of a side wall.

[0031] Furthermore, wall sections of the extruded profile that run parallel and spaced apart from one another are advantageously designed and intended to support one another in the event of a crash. This measure improves the crash behavior and energy absorption of the second deformation element and thus of the bumper assembly as a whole.

[0032] An expansion compensation element is provided, in particular, in an outer side wall of the extruded profile. An expansion compensation element can, for example, be formed by a corrugated or curved section within the side wall. In the event of a crash, in particular an impact or collision load lateral to the direction of the vehicle's transverse axis on an end section of the cross member of the bumper assembly, the second deformation element deforms, with the outer side wall plastically deforming due to tensile stress. This results in the expansion compensation element being stretched, straightened, or leveled.

[0033] A target deformation element is designed and intended to specifically initiate deformation in the event of an impact.

[0034] Furthermore, the extruded profile advantageously has mounting sections and / or mounting elements for the material-locking or for the force-locking and / or form-locking connection with the cross member and / or a longitudinal flange plate.

[0035] Mounting sections and / or mounting elements can have mounting openings for the passage of screw or rivet fasteners. Furthermore, mounting sections or mounting elements can have form-fitting contours. A form-fitting contour can, for example, be a hook element provided on a wall section of the crossbar on the cross member side. Using the hook element, the extruded profile can be pushed onto a section of the cross member, in particular the cross member rear wall. Additionally, the extruded profile can be welded to the cross member.

[0036] In a further embodiment, a flange plate is provided on which a longitudinal member-side end of a crash box and the extruded profile are supported. The flange plate can have positioning elements or mounting elements on which the extruded profile is positioned and / or supported and / or can be mounted. A mounting element can also function as an abutment for the extruded profile within the bumper assembly.

[0037] Instead of flange plates on the longitudinal member side, it can also be provided that the crash boxes and / or the extruded profile can be designed so that they can be inserted directly into a vehicle longitudinal member or a longitudinal member section and screwed to them.

[0038] Preferably, a crash box and an adjacent extruded profile are spaced apart in the longitudinal direction of the cross member. The longitudinal direction of the cross member extends along the y-axis (vehicle transverse axis). This spacing ensures that in the event of deformation of the second deformation element, there is no collision between the first deformation element and the second deformation element.

[0039] The distance between a crash box and the adjacent extruded profile is measured between the adjacent side walls of the crash box and the extruded profile. These are the side wall of the crash box on the side of the extruded profile and the inner side wall of the extruded profile.

[0040] In the bumper assembly, a crash box is integrated between each longitudinal member of the vehicle and the cross member. The cross member has a central longitudinal section, to which end sections are connected on either side. Each end section extends outward from a crash box to the outer end of the cross member. The extruded profile is arranged laterally next to at least one crash box, between the corresponding end section and a support on the longitudinal member.

[0041] In a further advantageous embodiment, the extruded profile and a flange plate, in particular the flange plate on the longitudinal member side, are formed as a single piece and are extruded or extruded from the same material.

[0042] Furthermore, the extruded profile advantageously has at least one extrusion seam. The extrusion seam extends in the installed position of the extruded profile in the z-axis (vehicle vertical axis). In particular, the one or each extrusion seam is provided in a corner or corner region of the extruded profile at the transition from the cross member-side transverse web to the inner side wall and the outer side wall, or at the transition or corner between the longitudinal member-side transverse web and the inner side wall and the outer side wall. Preferably, the extruded profile has four extrusion seams in the horizontal cross-section corresponding to the vehicle plane. One extrusion seam is arranged in each corner of the extruded profile. The extrusion seams are therefore positioned in the areas of the extruded profile that are subject to a low risk of deformation or stress.In contrast to weld seams, process-related extrusion seams are characterized by the absence of potentially adverse heat-affected zones, strength fluctuations and / or material inhomogeneities, which can occur during welding processes as a result of necessary welding consumables or impurities.

[0043] In advantageous embodiments and modifications, the bumper arrangement comprises one or more of the following features, which are provided individually or in a technically advantageous combination: the second deformation element is an extruded profile which is arranged in the bumper arrangement such that the extrusion direction is directed in the z-axis (vehicle vertical axis); the extruded profile of the second deformation element has at least one hollow chamber open on the top and bottom; the first deformation element and the second deformation element are arranged at a distance from one another in the longitudinal direction of the cross member; the second deformation element is arranged offset outwards towards the end of the cross member relative to the first deformation element; the first deformation element and the second deformation element are supported on a common flange plate on the longitudinal member side;The extruded profile of the second deformation element has an inner side wall and an outer side wall, which extend in the x-axis (vehicle longitudinal axis) between the cross member and a longitudinal member-side flange plate, wherein the inner side wall and the outer side wall are connected by a cross member-side transverse web extending parallel or substantially parallel to the cross member and by a longitudinal member-side transverse web extending parallel or substantially parallel to the longitudinal member-side flange plate; The extruded profile of the second deformation element has wall sections with curves, folds, beads, constrictions, wall thickness reductions and / or wall thickness reinforcements; By shaping walls or wall sections of the extruded profile forming the second deformation element, desired deformation elements and / or expansion compensation elements are formed;the extruded profile of the second deformation element has mounting sections and / or mounting elements on the cross member side and / or the longitudinal member side, which are designed and intended to mount the extruded profile in the bumper arrangement; the first deformation element is a crash box and is formed by an extruded profile; the cross member is an extruded profile; the cross member encloses a hollow chamber; the cross member encloses two hollow chambers; the cross member has a U-shaped, C-shaped, or hat-shaped profile in vertical cross section;The cross member, the first deformation elements, and / or the second deformation element are made of metal, in particular light metal, whereby the components can be made of the same material or of different materials and / or material grades. The extruded profile has at least one extrusion seam running along the z-axis (vehicle vertical axis). The extruded profile has extrusion seams located in the corners or corner regions of the extruded profile relative to the horizontal plane (= vehicle plane).

[0044] The invention is described in more detail below with reference to exemplary embodiments illustrated in the drawings. In the drawings: Figure 1 shows a technically schematic view of a bumper arrangement in a top view; Figure 2 shows a section of a bumper arrangement with the representation of an end section of the bumper arrangement in a perspective view; Figure 3 shows a perspective view of the second deformation element from the Figure 2 ; Figure 4 shows a section of a further embodiment of a bumper arrangement in perspective view; Figure 5 shows the second deformation element according to the illustration of Figure 4; Figures 6 to 9 show embodiments of second deformation elements, each in a perspective view and partially technically schematic; Figure 10a shows a section of a bumper arrangement before a pole test (Center Pole Test); Figure 10b shows the bumper arrangement after the impact during the pole test; Figure 11a shows a section of a bumper arrangement before an RCAR test (Research Council for Automobile Repairs) and Figure 11b shows the bumper arrangement according to the illustration of Figure 10 after impact during the RCAR test.

[0045] In the Figures 1 to 11 The same reference symbols are used for identical or similar components, even if a repeated description is omitted for reasons of simplification.

[0046] In the Figures 1 as well as in the Figures 10a and 11aA vehicle coordinate system is shown in each case. The vehicle coordinate system identifies the axes within a motor vehicle and the bumper assembly 1 installed in the motor vehicle. The x-axis corresponds to the vehicle's longitudinal axis, the y-axis corresponds to the vehicle's transverse axis, and the z-axis corresponds to the vehicle's vertical axis.

[0047] Based on the Figure 1 the basic structure of a motor vehicle bumper arrangement 1 according to the invention is explained.

[0048] The bumper assembly 1 has a cross member 2 that can be secured transversely to longitudinal members (not shown here) of a motor vehicle. The bumper assembly 1 further comprises first deformation elements in the form of crash boxes 3.

[0049] The cross member 2 extends along the vehicle's transverse axis (y-axis). The bumper assembly 1 is supported on the longitudinal members via the crash boxes 3, with a flange plate 4 integrated into the longitudinal member. The flange plates 4 connect the bumper assembly 1 to the vehicle.

[0050] The cross member 2 has a central longitudinal section 5, to which end sections 6 are connected on both sides in a single piece and made of the same material. The end sections 6 each extend from a crash box 3 outward to the respective free end 7 of the cross member 2.

[0051] A second deformation element is arranged laterally next to each crash box 3, offset outward toward the free end 7 at a distance a from each crash box 3. The second deformation elements are extruded profiles 8. The second deformation elements are arranged between an end section 6 of the cross member 2 and a longitudinal member-side support 9. The longitudinal member-side support 9 is formed on the flange plate 4.

[0052] The extruded profiles 8 forming the second deformation elements are cut from an extruded profile strand. The extrusion direction S, in which the profile strand was extruded during its production, is oriented along the z-axis (vehicle vertical axis) of the motor vehicle for the extruded profiles 8 mounted in the bumper assembly 1. The extruded profiles 8 are cut to length from the profile strand, with the length corresponding to the height of the second deformation element along the vehicle vertical axis.

[0053] A section of a bumper arrangement 1 is shown in the Figure 2 . The bumper assembly 1 as shown in the illustration of Figure 2 arranged and formed by an extruded profile 8 second deformation element is in the Figure 3 shown individually.

[0054] On the longitudinal member side, the second deformation element or the extruded profile 8 is supported on the flange plate 4. A positioning element 10 and a mounting element 11 for the extruded profile 8 are formed on the flange plate 4. The mounting element 11 is formed by a web or leg and is used in particular for the positive and non-positive coupling, for example for screwing the extruded profile 8 to the flange plate 4. In the Figure 2 Not shown are optional mounting holes in the mounting element 11.

[0055] The crash box 3 and the extruded profile 8 are supported on the common flange plate 4.

[0056] The extruded profile 8 is preferably made of light metal or a light metal alloy. The extruded profile 8 has an inner side wall 12 and an outer side wall 13. The inner side wall 12 runs along the side of the extruded profile 8 facing the crash box 3. The outer side wall 13 runs along the side of the extruded profile 8 facing the free end 7. The inner side wall 12 and the outer side wall 13 are connected by a front transverse web 14 on the cross member side and a rear transverse web 15 on the longitudinal member side. The side walls 12, 13 and the transverse webs 14, 15 of the extruded profile 8 enclose a hollow chamber 16.

[0057] The extruded profile 8 is arranged at a distance a in the longitudinal direction of the cross member 2. The distance a is measured between the side wall of the crash box facing the extruded profile and the inner side wall 12 of the extruded profile 8.

[0058] The extruded profile 8 has a mounting section 17. The mounting section 17 is formed by an extension of the crossbar-side transverse web 14. The mounting section 17 protrudes beyond the outer side wall 13 in the direction of the free end 7 of the crossbar 2 as an extension of the crossbar-side transverse web 14. The mounting section 17 has mounting openings 18 for the passage of connecting means, via which the extruded profile 8 can be attached to the crossbar 2.

[0059] The inner side wall 12 of the extruded profile 8 has a doubly curved or corrugated wall section 19. The outer side wall 13 also has a wave-shaped or curved wall section 20. The wall sections 19 and 20 are designed so that in the event of an impact, a wave crest in the outer side wall 13 can be supported within the two waves or a wave trough of the inner side wall 12 and is secured against slipping. The curved wall section 19 in the inner side wall 12 forms a desired deformation element 21 to initiate targeted deformation in the event of an impact. The curved wall section 20 in the outer side wall 13 forms an expansion compensation element 22, which is stretched in the event of a central impact and the resulting tensile loads, whereby the expansion compensation element 22 is straightened.

[0060] Recognizable in the Figure 3are four extrusion seams N1, N2, N3, N4. Due to the relatively low risk of deformation or stress in the four corner areas of the extruded profile 8, the extrusion seams N1 to N4 are positioned at the transition between the cross member-side cross web 14, the longitudinal member-side cross web 15, and the inner side wall 12 and the outer side wall 13.

[0061] In the bumper arrangement 1 as shown in the Figure 4 a second deformation element formed by an extruded profile 8 is provided, as shown in the Figure 5 The bumper assembly 1 and the extruded profile 8 correspond in their basic construction to the previously described embodiment. Figure 5In the extruded profile 8 shown, both the cross member-side crossbar 14 and the longitudinal member-side crossbar 15 have a mounting section 17. The mounting sections 17 are each formed by an outwardly projecting extension of the crossbar 14 or the crossbar 15, respectively. Each mounting section 17 has mounting openings 18 for the passage of connecting means.

[0062] The Figures 6 to 8 show various embodiments of extruded profiles 8, each of which can form a second deformation element within a bumper assembly 1. The extruded profiles 8 have an extrusion direction S resulting from the extrusion process. The extruded profiles 8 are arranged in a bumper assembly 1 such that the extrusion direction is directed along the z-axis (vehicle vertical axis).

[0063] The inner side wall 12 and the outer side wall 13 of the extruded profile 8, as in Figure 6shown, is curved in a wave-like manner several times, with the amplitude and wavelength being coordinated with each other, in such a way that, particularly during a small overlap impact, wave crests pointing towards each other come into contact with each other due to deformation and support each other.

[0064] For the extruded profile 8 as shown in Figure 7 A mounting section 17 is provided on the front crossbar 14 on the cross member side for a force-fitting and form-fitting connection to the cross member 2. The mounting section 17 is formed by a hook element 23 on the cross member side crossbar 14. Using the hook element 23, the extruded profile 8 can be pushed onto a cross member rear wall 24. This is particularly possible if the cross member 2 is a single-chamber profile. A recess can also be provided on the cross member 2 to accommodate the upper tongue 25 of the hook element 23.

[0065] For the extruded profile 8 as shown in the Figure 8 As shown, a central web 26 is provided extending between the inner side wall 12 and the outer side wall 13. The illustration is technically schematic. The central web 26 is a one-piece component of the extruded profile 8 and extends in the central region between the curved wall sections 19 and 20 of the inner side wall 12 and the outer side wall 13.

[0066] In this embodiment, the extruded profile 8 has two hollow chambers 16.

[0067] For the extruded profile 8, as shown in the Figure 8 As shown, a central wall 27 extends between the longitudinal member-side transverse web 15 and the cross member-side transverse web 14. This design also means that the extruded profile 8 has two hollow chambers 16.

[0068] Based on the Figures 10a and 10bThe deformation behavior of the bumper assembly 1 during a center pole test is explained. In a pole test, the bumper assembly hits an obstacle formed by a pole in the center of the vehicle's longitudinal direction ( Figure 10a ).

[0069] Upon impact, the bumper assembly 1 deforms as shown in the Figure 10b shown. The energy resulting from the impact is transferred via the cross member 2 into the crash box 3 and the outer second deformation element formed by the extruded profile 8. The crash box 3 and the extruded profile 8 are deformed in the direction of the vehicle's transverse axis. During the deformation of the extruded profile 8, the outer side wall 13 is subjected to tensile stress. The expansion compensation element 22 in the side wall 13 stretches, dissipating or converting impact energy and counteracting failure of the outer side wall 13.

[0070] Based on the Figures 11a and 11bAn impact scenario in an RCAR structural test is explained. In an RCAR test, the bumper assembly 1 collides axially with a fixed barrier with an overlap ratio of 40%. Figure 11a shows the situation immediately before impact. The Figure 11b shows the situation after the impact.

[0071] The bumper assembly 1 and the first deformation element integrated therein in the form of the crash box 3 and the second deformation element formed by the extruded profile 8 are deformed. The impact energy is converted into deformation work. The wall sections 19, 20 of the side walls 12, 13, which run at a distance from one another in the y-axis in the extruded profile 8, are designed and intended to support one another in the event of a crash. During the deformation process, the inner side wall 12 and the outer side wall 13 of the extruded profile 8 are moved towards one another and support one another. For this purpose, the contours of the wall section 19 in the inner side wall 12 and the wall section 20 in the outer side wall 13 are coordinated with one another, for example, designed to be complementary to one another, so that the curvatures of the wall sections 19, 20 interlock in a supporting manner.

[0072] It is possible that the extruded profile 8 and the flange plate 4 are manufactured in one piece or in one piece and from the same material together by extrusion, i.e. extruded. Reference symbol:

[0073] 1 - bumper assembly 2 - cross member 3 - crash box 4 - flange plate 5 - longitudinal section 6 - end section 7 - free end of 2 8 - extruded profile 9 - support 10 - positioning element 11 - mounting element 12 - inner side wall of 8 13 - outer side wall of 8 14 - cross member side cross web 15 - longitudinal member side cross web 16 - hollow chamber 17 - mounting section 18 - mounting opening 19 - wall section 20 - wall section 21 - target deformation element 22 - expansion compensation element 23 - hook element 24 - cross member rear wall 25 - tongue of 23 26 - center web 27 - center wall a -distance S -extrusion direction

Claims

1. Motor vehicle bumper arrangement with a cross member (2) and first deformation elements in the form of crash boxes (3), wherein a second deformation element is provided laterally next to at least one first deformation element, wherein the second deformation element is an extruded profile (8) and has an inner side wall (12) and an outer side wall (13), which are connected to one another via at least one transverse web (14, 15), wherein the second deformation element is disposed offset outwardly relative to the first deformation element in the direction of the end (7) of the cross member (2) and one of the crash boxes (3) can be integrated between a longitudinal member of the motor vehicle and the cross member (2), wherein the cross member (2) has a central longitudinal section (5) to which end sections (6) are connected on both sides, each of which extends from a crash box (3) outwardly to an outer end (7) of the cross member (2), wherein the extruded profile (8) is disposed laterally next to at least one crash box (3) between the end section (6) and a longitudinal member-side support (9), characterised in that at least one wall section (19, 20) of the extruded profile (8) has a target deformation element (21) and / or an expansion compensation element (22).

2. Bumper arrangement according to claim 1, characterised in that the extruded profile (8) has at least one hollow chamber (16), which is open at the bottom and at the top of the extruded profile (8).

3. Bumper arrangement according to any one of claims 1 to 2, characterised in that wall sections (19, 20) of the extruded profile (8), which run at a distance from one another, are configured and intended to support one another in the event of a crash.

4. Bumper arrangement according to any one of claims 1 to 3, characterised in that the extruded profile (8) has mounting sections (17) for the material-bonding or for the force-fitting and / or form-fitting connection with the cross member (2) and / or with a flange plate (4) on the longitudinal member side.

5. Bumper arrangement according to any one of claims 1 to 4, characterised in that at least one flange plate (4) is provided, on which a longitudinal member-side end of a crash box (3) and the extruded profile (8) are supported.

6. Bumper arrangement according to claim 5, characterised in that the flange plate (4) has a positioning element (10) and / or a mounting element (11) against which the extruded profile (8) abuts.

7. Bumper arrangement according to any one of claims 4 to 6, characterised in that the extruded profile (8) and a flange plate (4) are extruded in one piece and from the same material.

8. Bumper arrangement according to any one of claims 1 to 7, characterised in that a crash box (3) and an adjacent extruded profile (8) are disposed at a distance (a) in the longitudinal direction of the cross member (2).

9. Bumper arrangement according to any one of claims 1 to 8, characterised in that the extruded profile (8) has at least one extrusion seam (N1 - N4), wherein the extrusion seam (N1 - N4) is disposed in a corner region at the transition between a transverse web (14, 15) and a side wall (12, 13).