Covering on a component of an exhaust system and method for producing such a component with a covering

Abstract

A component for an exhaust system of an internal combustion engine is described, the component having a wall in which at least one opening is arranged. A perforated cover (16) at least partially closes the opening, the cover (16) being mounted on the wall by means of a support (18), sections (32, 34) of the cover (16) engaging in the opening (28, 30) arranged on the support (18). Furthermore, an exhaust system having such a component and a method for producing such a component are proposed, wherein the cover (16) is mounted on the support (18) by engaging at least one section (32, 34) of the cover (16) to the opening (28, 30) arranged on the support (18).

Description

Technical Field

[0001] The invention relates to a component for an exhaust system of an internal combustion engine, the component having a wall in which at least one opening is provided, and having a perforated cover which at least partially closes the opening.

[0002] Furthermore, the invention relates to an exhaust system for an internal combustion engine having such a component and to a method for producing such a component. Background Art

[0003] The component of the exhaust system can be an exhaust-gas-conducting pipe or an exhaust-gas-conducting housing in which, for example, a catalyst substrate or a particle filter is arranged. The exhaust-gas-conducting housing can also be a muffler housing.

[0004] Internal combustion engines are, in particular, engines for motor vehicles which operate according to the Otto principle (petrol principle) or according to the Diesel principle (diesel principle).

[0005] An example of a component of the type mentioned at the outset can be found in DE 10 2015 113 159 A1. When the exhaust gas flows through the component, the openings in the wall of the component covered by the perforated cover are used for sound absorption. Due to the high gas flow rate through the perforations of the cover, fewer resonances are generated by the standing waves inside the component (also at low gas flow rates). In addition, turbulence in the exhaust gas flow can be suppressed and converted into laminar flow, thereby reducing the proportion of higher frequencies in the frequency spectrum.

[0006] The perforated cover can be a thin sheet provided with a large number of small openings. The degree of perforation is in the order of 1% to a maximum of 10% of the total area of ​​the cover, in particular in the range from 4% to 8%. Each individual hole has a diameter of 0.02 mm. 2 and 2mm 2 The area size is in the range between 0.04 mm and 1.5 mm. 2 Up to 1mm 2 The area size in the range of .

[0007] The perforated cover is usually welded to the wall of the exhaust gas guide component. This results in a reliable fastening with a desired long service life. However, it has been found that high stresses can act on the perforated cover in the event of thermal expansion. The greater the difference in the coefficients of thermal expansion of the individual components, the more severe the stresses in the perforated cover. Examples of different thermal expansion are, on the one hand, ferritic steel alloys, which can be used for the exhaust gas guide component, and, on the other hand, austenitic steel alloys, which are used for the perforated cover. Against this background, it is proposed in DE 10 2015 113 159 A1 that the perforated cover is mounted on the wall by means of a bracket and with play. Summary of the invention

[0008] The object of the present invention is now to further improve the known components of an exhaust system. In particular, these components should be able to be produced quickly and easily and thus be inexpensive.

[0009] This purpose is achieved by a component of the type mentioned at the beginning, in which a bracket is provided, a perforated cover is mounted on the wall of the component by means of the bracket, and (a) section of the cover is engaged (inserted) into an opening arranged at the bracket. The opening should be understood as any local cavity or any local penetration at the bracket. However, the opening is preferably a through hole, that is, a penetration through a section of the bracket, which connects the two opposite sides of the bracket to each other. The section of the cover is engaged (inserted) into the opening, which means that the section extends into the opening at least from one side. Optionally, the section can also extend from the opening on the opposite side. By engaging the section of the cover into the opening, the cover is fastened to the retaining member. Here, it is preferably a shape-fitting fastening. Thus, an assembly including a cover and a bracket is produced, which can be manipulated separately from the rest of the components of the exhaust system. By connecting the cover to the bracket, the assembly can be fastened to the wall to which it belongs quickly and simply. Overall, this leads to the fast and simple producibility of the component according to the present invention. Furthermore, it is advantageous that the sections of the cover can be quickly engaged (introduced / inserted) into the associated openings on the holder, in particular without tools. This further simplifies and accelerates the production of the component according to the invention.

[0010] If the segment again protrudes from the opening, the protruding part of the segment can be used to visually check the correct position of the cover on the support. This control can be carried out with the help of the human eye or in an automated manner. In both variants, it is checked whether a part of the segment protrudes from the opening. Additionally or alternatively, it can be checked how much this part of the segment protrudes from the opening. Based on these findings, inferences are drawn about the position of the cover on the support.

[0011] In a preferred embodiment, the cover completely closes the opening. Compared with an opening that is only partially closed, relatively little exhaust gas can escape from the interior of the component according to the invention through the opening. However, the sound attenuation effect already mentioned at the beginning still occurs.

[0012] The support can be an embossed and / or stamped plate component (sheet metal part). Such a component can be produced cheaply and in large quantities using standard production systems. In this case, the support preferably has a wall thickness of 0.8 mm to 1.2 mm, in particular a wall thickness of the order of 1 mm. Within this wall thickness range, there is a good compromise between simple and cheap producibility of the support and sufficient mechanical stability of the support, so that the cover can be reliably fastened to the wall with the help of the support.

[0013] The cover advantageously has a wall thickness in the order of magnitude of less than 1.0 mm, in particular in the order of magnitude of less than 0.5 mm. It has been found that this wall thickness range represents a good compromise between the mechanically necessary stability of the cover and good efficiency of the above-mentioned acoustic effect.

[0014] At least two sections of the cover are preferably engaged in corresponding openings of the support that are separated from each other, in particular at least two sections are arranged on substantially opposite sides (opposite sides) of the cover. Here, the format of the sections of the cover that engage in the corresponding assigned openings at the support can be basically freely selected, and three or four such sections can also be provided. However, it has been found that the cover cover can already be reliably fastened to the support (holder) with the aid of two sections. If the two sections are arranged on substantially opposite sides of the cover and therefore also engage in the corresponding assigned openings arranged on the opposite sides of the support, a particularly high reliability can be achieved. In this case, the size of the cover can be determined so that due to the relative displacement of the cover relative to the support, the two sections can no longer completely slide out of the assigned openings. Therefore, the cover is particularly firmly fastened to the support.

[0015] According to a variant, at least one section of the cover that engages in the associated opening is a corner of the cover and / or a continuation of the cover, in particular wherein all sections of the cover that engage in the associated opening are corners of the cover or continuations of the cover. A continuation is understood here to be a section of the cover that proceeds from the overall geometry of the cover, i.e., for example, a quadrilateral or a circle, and protrudes beyond this geometry. The continuation may also be referred to as a projection or a tab. Such a continuation can be produced relatively simply. It is even simpler if the sections of the cover are corners. This does not cause additional production costs.

[0016] The aforementioned continuation portion can be arranged at the corner of the cover, but it is not necessary. In particular, the continuation portion is placed at the edge section of the cover, and the edge section extends between two corners respectively.

[0017] A particularly preferred embodiment is configured such that two opposite corners of the cover engage in correspondingly assigned, mutually separated openings of the support. The corners are, for example, diagonally opposite. Two adjacent corners of the cover may also engage in correspondingly assigned, mutually separated openings of the support.

[0018] Alternatively, a continuation can be provided at two opposite edges of the cover, wherein the two continuations engage (snap into / snap into) correspondingly associated openings of the frame that are separated from one another.

[0019] Furthermore, the support can have a support section which engages into the cover from behind in a direction perpendicular to the wall. Such a support section can be designed as a tab, a tongue, a projection or a nose at the support. By engaging from behind, the cover is fixed in a direction perpendicular to the wall. In combination with the fact that a section of the cover engages into the opening of the support, a simple and reliable fastening of the cover to the support is produced. In this case, the support is structurally simple, so that it can be produced inexpensively.

[0020] The support and the cover can be connected to each other without material fit (without material bonding) and / or only with form fit. Therefore, the material fit connection can be completely omitted. In this case, of course, the machines and systems required for producing the material fit connection can also be omitted. This simplifies the production of the component according to the invention. In this case, in particular, the welding process and the brazing process are omitted, which leads to the elimination of the thermal load of the parts to be connected related to the welding process and the brazing process. Nevertheless, a reliable connection of the support and the cover is still ensured, that is, preferably by a form fit connection. Therefore, the support and the cover can be pre-assembled as a component. This simplifies and accelerates the relevant production method.

[0021] In one embodiment, the support is a frame which is mounted on the wall and surrounds the outer edge of the cover. In this way, the perforated cover is securely fastened to the component in all directions.

[0022] Alternatively, the cover is supported on the support essentially without play in a direction perpendicular to the wall. The cover is therefore essentially not movable relative to the support perpendicular to the wall. The cover thus reliably closes the opening in the wall. The support without play in this direction does not exclude the cover being supported on the support movably in other directions. The cover is therefore in particular no longer pressed or clamped on the support.

[0023] According to a variant, a play is provided between the support and the cover so that the cover can be displaced parallel to the wall of the component. The perforated cover is thus fastened to the component, allowing thermal expansion and the resulting displacement relative to the support and to the wall of the component. Here, the perforated cover is mounted on the component in a sliding fit.

[0024] If the section again protrudes from the opening, the play and / or the movability of the cover can be controlled by manually or mechanically applying a force to the protruding part of the section and thereby causing a displacement of the cover. If the cover does not respond to the force by changing position, the cover may get caught (stuck) on the bracket in an undesirable manner.

[0025] In this case, a play can be formed between the end face of the cover and a stop face of the support which is opposite and spaced from the end face. Even if the play on one side of the cover is sufficient, it is still desirable to have play in every direction parallel to the wall so that the cover can expand in every direction. The cover can thus expand (elongate) or contract independently of the support.

[0026] In this case, the support can have a mounting section, which is mounted on the wall, and a holding section for the cover, which is offset from the mounting section as viewed in a direction perpendicular to the wall, wherein the stop surface is formed by a step at the transition from the mounting section to the holding section. As a result, the support can be designed as a single layer and is therefore structurally simple. The mounting section can be welded or brazed, for example, to the wall.

[0027] Advantageously, one or more openings are arranged at the transition from the mounting section to the retaining section, in particular wherein one or more openings are arranged in the corner region of the bracket. As already explained, one or more openings are arranged at the bracket so that the assigned section of the cover can be engaged (clipped / inserted) into the opening. If the section of the cover is a corner, the openings are preferably arranged in the corner region of the bracket. In this embodiment, the edge region of the cover extends near the transition from the mounting section of the bracket to the bracket section. By means of this design construction, the component can be constructed relatively compactly and lightly. In addition, in the region, the opening can be simply and cheaply engaged (introduced / inserted) into the bracket.

[0028] In an alternative design, the support and the cover consist of materials with different thermal expansion properties. Thus, the material best suited to the task assigned to the cover can be used for the cover. Here, too, there is no need to pay attention to the thermal expansion properties. The same is true for the support. Thus, the most suitable material is used overall not only for the support but also for the cover, thereby ensuring high quality and functionality of the components of the exhaust system. As already explained, different thermal expansion properties can be compensated by means of provided play.

[0029] Here, the support can include a ferritic steel alloy, and / or the cover can include a hot and wet corrosion resistant alloy, in particular an austenitic steel alloy or a ferritic steel alloy, and / or the wall can include a ferritic steel alloy. These materials are particularly suitable for the correspondingly assigned construction elements (modules).

[0030] The object is also achieved by an exhaust system for an internal combustion engine, which comprises a component according to the invention. In particular, due to the rapid and simple producibility of the component according to the invention, the exhaust system as a whole can also be produced relatively quickly and simply. As a result, the exhaust system is also relatively inexpensive.

[0031] Furthermore, the object is achieved by a method of the type mentioned at the outset, which method comprises the following steps:

[0032] a) mounting the perforated cover on the support by engaging (inserting) at least one section of the cover into an opening provided on the support, and then

[0033] b) Fastening the assembly comprising the cover and the bracket to the wall such that the cover at least partially closes the opening provided in the wall.

[0034] The engagement of the sections of the cover into the openings at the support can be carried out quickly and simply. Preferably, no tools are required for this purpose. It is also conceivable to use a mounting device and to mount the cover manually, partially automatically or fully automatically at the support with the aid of the mounting device. The cover and the support then form a coherent (adjoining) assembly, which makes their handling and positioning at the wall easier. In particular, the assembly can be fastened precisely to the wall. Overall, the method can therefore be run quickly and can be carried out with little effort.

[0035] In the framework of step b), the framework and the cover can be welded or soldered at the wall.

[0036] During step a), the cover can be in a bent state in order to engage at least one section in the corresponding opening, and in the unloaded state (relaxed state) that is subsequently assumed, the cover can be supported on the support only in a form-fitting manner. The cover is therefore loaded with a certain load in the bent state, which leads to bending of the cover. In the unloaded state (relaxed state), the cover is planar compared to the bent state, wherein it is not excluded that the cover also has a certain curvature in the unloaded state, which corresponds, for example, to the contour of the support or the wall. However, the curvature assumed in the unloaded state is significantly smaller than the curvature present in the bent state. In this way, the cover can be supported on the support simply and reliably. Therefore, geometrically, it is impossible for the sections of the cover to slide out of the correspondingly assigned openings.

[0037] Alternatively or additionally, during step a), two opposite corners of the cover can be engaged in a correspondingly assigned opening. The cover is thereby bent in such a way that the two opposite corners can be introduced into the correspondingly assigned opening. The cover is then transferred back into the unloaded state. The cover is thus held on the support in a form-fitting manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention is explained below based on various embodiments shown in the accompanying drawings. The accompanying drawings show:

[0039] - Figure 1Schematically shows a part of an exhaust system having two components according to the invention, which are produced by means of the method according to the invention,

[0040] - Figure 2 Shown in stereogram Figure 1 A detailed view of an assembly of one of the components shown in , including a cover and a frame,

[0041] - Figure 3 Shown in a view from above Figure 2 The components shown in

[0042] - Figure 4 Shown in bottom view Figure 2 The components shown in

[0043] - Figure 5 Corresponding to Figure 4 The view shows Figure 2 The framework of the components shown in

[0044] - Figure 6 Corresponding to Figure 4 A schematic bottom view shows Figure 2 An alternative to the components shown,

[0045] - Figure 7 Corresponding to Figure 4 The schematic bottom view shows Figure 2 Another alternative to the assembly shown,

[0046] - Figure 8 Corresponding to Figure 4 A schematic bottom view shows Figure 2 Additional alternatives to the components shown,

[0047] - Fig. 9 is corresponding to Figure 1 The cross-sectional view of section IX-IX in FIG.

[0048] - Fig.10 Show Fig. 9 A magnified detail of X, where the wall is omitted,

[0049] - Fig.11 A plan view of a Figure 1 An assembly of one of the components shown including a cover and a frame, and

[0050] - Fig.12 is corresponding to Fig.11 Cross-sectional view of section XII-XII in FIG. DETAILED DESCRIPTION

[0051] Figure 12 shows two components 10a, 10b of an exhaust system. Component 10a is a housing, while component 10b is an exhaust pipe, which serves, for example, to conduct exhaust gas from an internal combustion engine to the surroundings.

[0052] Components, by means of which the exhaust gas is treated, such as a catalyst substrate or a particle filter, can be arranged in the component 10a designed as a housing. Alternatively, it can also be a housing for a silencer.

[0053] Ferritic steel alloys can be used as material for the components 10a, 10b, in particular for their walls 12a, 12b, provided that the components 10a, 10b are arranged at a certain distance from the exhaust valves of the internal combustion engine and the temperature of the exhaust gas is therefore already somewhat reduced.

[0054] The walls 12a, 12b of the components 10a, 10b are provided with openings 14a, 14b, respectively. It can be circular, rectangular, polygonal or elliptical, for example, and have an area of ​​several square centimeters.

[0055] The openings 14a, 14b are arranged according to Figure 1 In the embodiment of , each is completely closed by means of a perforated cover 16a, 16b.

[0056] Here, the perforated covers 16a, 16b each comprise a metal foil or a metal sheet, the wall thickness of which can be, for example, 0.3 mm. They are provided with a plurality of small perforations, wherein the proportion of the perforations to the total area of ​​the covers 16a, 16b is in the range from 1% to 10%, and preferably in the range from 4% to 8%. A perforation degree of 6% is particularly preferred.

[0057] The perforations may have circular, rectangular or other geometric shapes. When the open (opening) area thereof is converted to a circle, the perforation diameter thereof may be in the order of 0.1 mm to 1.5 mm.

[0058] If the size of the openings is smaller than these values, micro-perforated covers 16a, 16b will also be mentioned.

[0059] As a material for the covers 16a, 16b, an alloy resistant to hot gas corrosion and moisture corrosion, for example, Inconel (Inconel) is used. Preferably, an austenitic steel alloy or a suitable ferrite alloy may be used.

[0060] The wall thickness of the covers 16 a , 16 b is less than 1 mm and in particular is in the order of magnitude of 0.3 mm.

[0061] These values ​​apply to the starting plate. With respect to the cutting or forming manufacturing processes that may be used to produce the cover, if the spacing of the surface tips is measured, the cover may be "thicker" after machining because burrs may be generated.

[0062] The perforated covers 16a, 16b are each fastened to the associated wall 12a, 12b by means of an associated bracket 18a, 18b.

[0063] The support is designed as a frame and consists of a sheet metal. Preferably, a ferritic steel alloy is used as material, in particular a steel alloy having the same thermal expansion properties as the associated components 10a, 10b, more precisely the associated walls 12a, 12b.

[0064] In the following detailed description of the components 10a and 10b, no distinction is made between Figure 1 The two embodiments shown in FIG. 1 are therefore also partially used without the suffixes “a” and “b”. The same applies to components 10 a and 10 b.

[0065] The bracket 18 has a circumferential mounting section 20, which is arranged to be fastened at the assigned (related) wall 12a, 12b. A retaining section 22 is arranged within the circumferential mounting section 20. This forms the inner edge of the bracket 18 and defines a recess 24, which has a size similar to the corresponding assigned opening 14a, 14b. Therefore, the recess can be slightly larger, slightly smaller or substantially the same as the corresponding assigned opening 14a, 14b.

[0066] If especially from Fig.10 As can be seen in the figure, the holding section 22 is offset relative to the mounting section 20 in a direction perpendicular to the mounting section 20 and therefore also perpendicular to the walls 12a, 12b. This offset is nominally at least the thickness of the perforated cover 16. It may happen that within the permissible tolerance range this offset is also smaller than the thickness of the perforated cover 16. However, this does not violate the intended function of the components 10a, 10b.

[0067] The offset between the holding section 22 and the mounting section 20 can be achieved by suitable embossing and / or stamping of a flat sheet metal blank of the carrier 18 .

[0068] The holding section 22 also defines a receiving portion for the cover 16, in which the cover can be arranged. The size of the cover 16 is selected so that it is slightly smaller than the receiving portion. In other words, a slight play s is retained between the end face of the cover 16 and the step 26 formed at the transition between the holding section 22 and the mounting section 20. The play s is in the range of 0.2 mm to 4 mm.

[0069] When the bracket 18 is mounted on the associated component 10a, 10b, due to the play s, the perforated cover 16 below the retaining section 22 can "wander" parallel to the wall of the component 10a, 10b until it hits the step 26, which serves as a stop surface on the bracket 18 for the cover 16.

[0070] In addition, according to Figures 2 to 5 In the embodiment of FIG. 1 , two openings 28 , 30 lying opposite one another are provided on the support 18 .

[0071] An associated section 32 , 34 of the cover 16 engages (is inserted) in each opening 28 , 30 .

[0072] In accordance with Figures 2 to 5 In the embodiment of , the cover 16 has two sections 32 , 34 , which are arranged on opposite sides of the cover 16 .

[0073] The sections 32 , 34 are corners of the cover 16 .

[0074] Correspondingly, the assigned openings 28, 30 are arranged in the corner regions of the support 18. Furthermore, the openings 28, 30 are located at the transition from the mounting section 20 to the holding section 22.

[0075] According to Figures 2 to 5 The implementation form is different, according to Figures 6 to 8 In the embodiment of FIG. 1 , the sections 32 , 34 of the cover 16 are designed as adjacent corners. The positions of the openings 28 , 30 result accordingly.

[0076] In accordance with Figure 6 and 7 In the embodiment of FIG. 2 , the sections 32 , 34 are adjacent along the short sides of the rectangular cover 26 .

[0077] Here, according to Figure 7 In the embodiment of FIG. 1 , the support 18 additionally has a bearing section 36 which adjoins the cover 16 from behind in a direction perpendicular to the walls 12 a , 12 b .

[0078] In the embodiment shown, the support section 36 is designed as a substantially rectangular continuation and is arranged on the inner side of the support 18. It extends substantially in the same plane as the mounting section 20. The cover 16 is therefore arranged in the region of the support section 36 between the support section 36 and the retaining section 22.

[0079] In accordance with Figure 8 In the embodiment of FIG. 1 , the sections 32 , 34 are adjacent along the long sides of the rectangular cover 16 .

[0080] The dimensions of the cover 16 and the bracket 18 can be determined in this case so that: the cover 16, in the substantially flat state of the assembly including the cover 16 and the bracket 18, is Figure 8 The edge 38 shown at the lower part of the support is against the support. In particular, the edge 38 is against the support 18 under the effect of a certain tension force.

[0081] Only when the assembly including the bracket 18 and the cover 16 is slightly bent during installation at the walls 12a, 12b, the bracket 18 and the cover 16 are aligned with each other. Figure 8 There is a certain amount of play in the vertical direction.

[0082] In accordance with Fig.11 and 12 In the embodiment of , the difference from the previous embodiment is only the design of the sections 32, 34 and the associated openings 28, 30, the sections 32, 34 being formed by the continuation of the cover 16. Here, only the section 32 is shown in the drawings.

[0083] In all embodiments, the cover 16 is connected to the support 18 in a form-fitting and non-materially bonded manner (without material bonding) via the sections 32, 34. The cover 16 and the support 18 thus form an assembly and can be fastened together on the associated wall 12a, 12b.

[0084] The connection between the cover 16 and the support 18 is designed and constructed in such a way that the cover 16 is supported on the support 18 substantially without play in a direction perpendicular to the wall 12. As already explained, the connection has play in a direction transverse to the wall.

[0085] The bracket 18 is fixedly mounted (attached) at the assigned wall 12a, 12b by means of its mounting section 20. In the embodiment example shown, the mounting section is welded at the wall 12a, 12b.

[0086] The components 10a, 10b are produced as follows.

[0087] First, the cover 16 is mounted on the associated support 18 by engaging (inserting) at least one of the sections 32, 34 of the cover 16 into the associated opening 28, 30. Figures 2 to 7 In the embodiment of the present invention, the corners of the cover 16 are joined (introduced / inserted) into the openings 28, 30 and in accordance with Figure 8 and 9 In the embodiment of , the section 32 designed as a continuation engages (is introduced / inserted) into the opening 30 .

[0088] In order to engage (introduce / insert) the sections 32, 34 into the associated openings 28, 30, the cover 16 can be transferred into a bent state by exerting a corresponding force on the cover 16. This can be done manually.

[0089] The sections 32, 34 are then positioned at the entrance of the assigned openings 28, 30, respectively. Subsequently, the cover 16 is released from the force, so that it enters an unloaded state (relaxed state), in which the cover 16 is flat or planar compared to the bent state. Here, the sections 32, 34 engage (insert) into the openings 28, 30. As already mentioned, it is only important that the cover 16 is flat or planar compared to the bent state. Thus, the cover 16 can still have a certain curvature in this state, which corresponds, for example, to the contour of the support 18 or the walls 12a, 12b.

[0090] The cover 16 is therefore supported on the support 18 in a form-fitting manner, and the cover 16 and the support 18 form an assembly.

[0091] The assembly is then arranged at the assigned wall 12 a , 12 b in such a way that it closes the opening 14 .

Claims

1. A component (10a, 10b) for an exhaust system of an internal combustion engine, the component being a pipe or a housing for conducting exhaust gas, the component comprising a wall (12a, 12b), at least one opening (14a, 14b) being provided in the wall, and a perforated cover (16, 16a, 16b) at least partially closing the opening (14a, 14b), wherein: A bracket (18, 18a, 18b) is provided, by means of which the perforated cover (16, 16a, 16b) is mounted on the wall (12a, 12b) of the component (10a, 10b), and wherein sections (32, 34) of the cover (16, 16a, 16b) engage in openings (28, 30) provided on the bracket (18, 18a, 18b), wherein at least two sections (32, 34) of the cover (16, 16a, 16b) are engaged in the corresponding openings (28, 30) separated from each other at the bracket (18, 18a, 18b), and At least one of the sections (32, 34) of the cover (16, 16a, 16b) that engages in the associated opening (28, 30) is a corner of the cover (16, 16a, 16b) and / or a continuation of the cover (16, 16a, 16b).

2. The component (10a, 10b) according to claim 1, characterized in that The support (18, 18a, 18b) has a bearing section (36) which engages into the cover (16, 16a, 16b) from behind in a direction perpendicular to the wall (12a, 12b).

3. The component (10a, 10b) according to claim 1, characterized in that The support (18, 18a, 18b) and the cover (16, 16a, 16b) are connected to each other without material fit and / or only with form fit.

4. The component (10a, 10b) according to claim 1, characterized in that The bracket (18, 18a, 18b) is a frame which is mounted at the wall (12a, 12b) and surrounds the outer edge of the cover (16, 16a, 16b).

5. The component (10a, 10b) according to claim 1, characterized in that The cover (16, 16a, 16b) is supported on the support (18, 18a, 18b) substantially without play in a direction perpendicular to the wall (12a, 12b).

6. The component (10a, 10b) according to claim 1, characterized in that A clearance (s) is provided between the bracket (18, 18a, 18b) and the cover (16, 16a, 16b), so that the cover (16, 16a, 16b) can be displaced parallel to the wall (12a, 12b) of the component (10a, 10b).

7. The component (10a, 10b) according to claim 6, characterized in that The play (s) is formed between an end surface of the cover (16, 16a, 16b) and a stop surface of the bracket (18, 18a, 18b), the stop surface being opposite to and spaced apart from the end surface.

8. The component (10a, 10b) according to claim 7, characterized in that The bracket (18, 18a, 18b) has a mounting section (20) which is mounted on the wall (12a, 12b), and the bracket has a retaining section (22) for the cover (16, 16a, 16b), the retaining section is offset from the mounting section (20) in a direction perpendicular to the wall (12a, 12b), and the stop surface is formed by a step (26) at the transition from the mounting section (20) to the retaining section (22).

9. The component (10a, 10b) according to claim 8, characterized in that One or more of the openings (28, 30) are arranged at a transition from the mounting section (20) to the retaining section (22).

10. An exhaust system for an internal combustion engine, the exhaust system comprising a component (10a, 10b) according to any one of claims 1 to 9.

11. A method for producing a component (10a, 10b) as claimed in any one of claims 1 to 9 for an exhaust system of an internal combustion engine, the method comprising the following steps: a) mounting the cover (16, 16a, 16b) on the support (18, 18a, 18b) by engaging at least one section (32, 34) of the perforated cover (16, 16a, 16b) into an opening (28, 30) provided on the support (18, 18a, 18b), and then b) fastening the assembly comprising the cover (16, 16a, 16b) and the bracket (18, 18a, 18b) at the wall (12a, 12b) such that the cover (16, 16a, 16b) at least partially closes the opening (14a, 14b) provided in the wall (12a, 12b).

12. The method according to claim 11, characterized in that During step a), the cover (16, 16a, 16b) is bent in order to engage at least one section (32, 34) in the associated opening (28, 30), and the cover (16, 16a, 16b) is supported on the support (18, 18a, 18b) only in a form-fitting manner in the subsequently assumed unloaded state.

13. The method according to claim 11 or 12, characterized in that During step a), two opposite corners of the cover (16, 16a, 16b) can be engaged in a respectively assigned opening (28, 30).

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