Exhaust-gas purification component, exhaust-gas system component, and exhaust-gas system

Abstract

The invention relates to an exhaust-gas purification component (1) at least comprising a honeycomb body structure (2), which extends along an axial direction (3) between an inflow side (4) and an outflow side (5) and through which an exhaust gas (6) can flow along the axial direction (3), and a sleeve (7), which extends with a fastening portion (9) and an attachment portion (10) around the honeycomb body structure (2) along a circumferential direction (8) extending transversely to the axial direction (3); wherein, in the fastening portion (9), the sleeve (7) is at least frictionally connected via an inner circumferential surface (11) to the honeycomb body structure (2); and wherein the attachment portion (10) extends from the fastening portion (9) toward the inflow side (4) and is arranged at a distance (13) from the honeycomb body structure (2) along a radial direction (12) extending transversely to the axial direction (3) and transversely to the circumferential direction (8).

Description

[0001] Exhaust gas purification component, exhaust system component and exhaust system

[0002] The present invention relates to an exhaust gas purification component, an exhaust gas system component and an exhaust gas system.

[0003] The exhaust gas purification component comprises at least one honeycomb structure extending axially between an inlet and an outlet, through which exhaust gas can flow along the axial direction. The honeycomb structure, in particular, has a plurality of channels extending from the inlet to the outlet, through which exhaust gas can flow.

[0004] The exhaust system component includes in particular a connecting pipe section and the described exhaust gas purification component, wherein the connecting pipe section can be arranged or is arranged between at least one combustion chamber of an internal combustion engine and the exhaust gas purification component.

[0005] The exhaust system includes, in particular, an internal combustion engine with at least one combustion chamber and the exhaust system component described.

[0006] The honeycomb structure is used particularly for exhaust aftertreatment and serves, for example, as a catalyst support in the exhaust systems of mobile internal combustion engines. Such a honeycomb structure provides a large surface area on which catalytically active material is positioned and brought into contact with the exhaust gas flowing through the structure. The invention is particularly applicable to exhaust gas purification in motor vehicles or also in stationary or other mobile systems. Numerous different designs of honeycomb structures for exhaust aftertreatment have already been proposed. A fundamental distinction is made between honeycomb structures made of ceramic and metal (steel or non-ferrous materials). However, honeycomb structures can also be made of plastic materials.

[0007] A honeycomb structure can be constructed with smooth and / or textured layers or sheet metal foils. These layers can be stacked, wound, and / or twisted and finally placed within a housing of the honeycomb structure, creating a multitude of channels through which the exhaust gas can flow. These channels can, for example, extend in straight lines, curves, and / or at an angle between the end faces of such a honeycomb structure.

[0008] With the aim of achieving the closest possible contact between the exhaust gas and the walls of the honeycomb structure, or the catalytic coating located therein, measures have already been proposed to reduce laminar flow of the exhaust gas through the honeycomb structure. For example, openings can be provided in the channel walls, creating interconnected channels. It is also known to incorporate deflection structures, guide vanes, etc., within the channels to achieve targeted flow redirection, pressure differences between the channels, or similar effects.

[0009] From DE 10 2012 004 918 A1, a honeycomb structure is known in which the structured layers have a corrugated structure, with adjacent layers exhibiting intersecting corrugated structures. Such corrugated structures can also be arranged directly on top of one another, i.e., stacked, because the crests and troughs of adjacent layers contact each other, thus preventing the layers from collapsing into one another. Unstructured smooth layers between the structured layers can therefore be omitted, thereby also reducing contact zones between the contacting layers. Such honeycomb structures offer a large surface area with minimal material usage, thus ensuring high efficiency in exhaust gas purification and also advantageous cold-start performance.

[0010] From DE 44 30 645 A1 a catalytic reactor is known in which an air gap is formed at least partially between the honeycomb body and the casing.

[0011] There is a constant need to further reduce emissions from combustion processes. Especially during a cold start, the exhaust gas purification components must be activated within a very short time.

[0012] The object of the present invention is to at least partially solve the problems mentioned with reference to the prior art. In particular, an exhaust gas purification component is to be provided which is activated as early as possible, especially during a cold start, so that exhaust gas purification begins.

[0013] To solve this problem, an exhaust gas purification component with the features according to claim 1 contributes. Advantageous further developments are the subject of the dependent claims. The features listed individually in the claims can be combined with one another in a technologically meaningful way and can be supplemented by explanatory details from the description and / or details from the figures, thereby showing further embodiments of the invention.

[0014] An exhaust gas purification component is proposed, at least one that includes

[0015] • a honeycomb structure extending along an axial direction between an inlet side and an outlet side, and through which exhaust gas can flow along the axial direction, and

[0016] • A sleeve extending around the honeycomb structure along a circumferential direction transverse to the axial direction, comprising a fastening section and a connection section. The sleeve is connected to the honeycomb structure in the fastening section via an inner circumferential surface, at least by frictional connection (particularly with respect to the axial direction; alternatively or additionally, by positive or material connection). The connection section extends from the fastening section towards the inlet side and is arranged at a distance from the honeycomb structure along a radial direction transverse to both the axial and circumferential directions, such that a circumferential gap is formed between the honeycomb structure and the connection section.The honeycomb structure extends beyond the sleeve, so that the connection section is spaced apart from the inlet side along the axial direction.

[0017] The axial direction refers in particular to an imaginary connection between the centroid of the inlet side and the outlet side. Specifically, the axial direction corresponds to the flow direction of the exhaust gas in a purely laminar flow through the exhaust gas purification component.

[0018] The honeycomb structure features a multitude of channels extending from the inlet to the outlet, through which the exhaust gas can flow. The honeycomb structure is constructed primarily of smooth and / or textured layers or sheet metal foils. These layers can be stacked, wound, and / or coiled and ultimately placed within a honeycomb housing, thus forming a multitude of channels through which the exhaust gas can flow. These channels can, for example, extend in a straight, coiled, and / or oblique manner between the end faces of such a honeycomb structure.

[0019] The housing of the honeycomb structure is formed in particular by the sleeve or by the fastening section. Specifically, the channel-forming layers of the honeycomb structure are exclusively enclosed by the fastening section and connected to it (i.e., to the inner circumferential surface), in particular by at least one soldered connection.

[0020] The sleeve's connection section extends from the mounting section towards the inlet side. The sleeve widens (or the honeycomb structure tapers radially), creating a circumferential free space between the sleeve and the honeycomb structure. This free space contains no internal components, ensuring that heat transfer between the honeycomb structure and the sleeve or connection section occurs exclusively via convection.

[0021] The honeycomb structure extends along the axial direction, in particular beyond the sleeve or the connection section, so that the (second) end of the sleeve is spaced (at a distance) from the inlet side along the axial direction.

[0022] This overhang of the honeycomb structure relative to the sleeve ensures that the honeycomb structure heats up more quickly, especially in the inlet area (e.g., during operation of an internal combustion engine and when the honeycomb structure is exposed to exhaust gas), because heat dissipation to the sleeve can only occur convectively (due to the surrounding free space). This allows for effective exhaust gas treatment to begin as early as possible, particularly during a cold start.

[0023] In particular, the honeycomb structure extends along the axial direction beyond the fastening section and the sleeve (first embodiment).

[0024] Alternatively, the sleeve extends along the axial direction at least to the downstream side or beyond the downstream side to a first end (of the sleeve) (second embodiment). In particular, the sleeve extends from an (upstream) second end via the connection section and the fastening section to a first end, with the honeycomb structure then extending beyond the first end to the downstream side (first embodiment), or with the sleeve extending to the downstream side or beyond (second embodiment).

[0025] In particular, the free space between the connecting section and the honeycomb body structure extends along the axial direction over a first length, wherein the honeycomb body structure extends along the axial direction beyond the sleeve over a second length (the overhang), wherein the second length is at least equal to the first length.

[0026] In particular, the first length is between 5% and 50%, and especially between 10% and 25%, of the largest diameter of the honeycomb structure extending transversely to the axial direction.

[0027] In particular, the second length is between 100% and 400% of the first length, especially between 100% and 250%, preferably between 100% and 150%.

[0028] In particular, the honeycomb structure has channels extending between the inlet and outlet sides, allowing exhaust gas to flow through it; the honeycomb structure comprises at least one stack formed by at least one (structured, i.e., having a texture, i.e., not smooth) first layer, which has a corrugated structure. The first layer extends between the inlet and outlet sides along a lateral direction parallel to the axial direction and along a longitudinal direction transverse to the axial direction between a first layer end and a second layer end.In particular, the wave structure of the first layer features a multitude of parallel wave troughs and crests, each extending along a direction of propagation at an angle to the latitude of greater than zero degrees and at most 45 degrees. Specifically, the stack and channels are formed by placing another structured region of the same first layer or by placing a structured second layer on top of the first layer. The other region of the first layer or the second layer is structured such that the overlapping wave troughs and crests intersect, thus defining a contact zone between the wave troughs and crests along the direction of propagation.

[0029] In particular, the first layer is (essentially) rectangular. Specifically, the extent of the first layer along its length direction is greater than along its width direction.

[0030] In particular, the entire first layer is structured, i.e., it has a wave structure (i.e., no smooth / unstructured areas) across its entire extent in the width and length directions.

[0031] In particular, the extent of the layer in the lateral direction is between 5 and 1,000 millimeters, preferably less than 200 millimeters.

[0032] In particular, the material thickness of the first layer (in a vertical direction extending perpendicular to the latitude and longitude direction) shall be between 20 pm and 2 millimeters, in particular at most 1.0 or even at most 0.5 millimeters.

[0033] In particular, the wave structure has an amplitude (i.e., a maximum extent of the structured first layer in the vertical direction) between one millimeter and 10 millimeters, especially of at most 5 millimeters.

[0034] In particular, the wave troughs and crests each extend at an angle of inclination to the lateral direction of greater than one degree, preferably greater than two or even three degrees. In particular, the first angle of inclination is at most 35 degrees, preferably at most 25, at most 20, or even at most 15 degrees. When such layers are arranged one above the other, the angles between the contacting wave troughs and crests correspond to the sum of the angles of inclination of each layer.

[0035] The intersecting well structures of the contacting layers in the honeycomb structure lead in particular to a reduction of the intersecting spaces between the contacting layers, which are always numerous when the wave troughs and wave crests are aligned straight and extend over a large length. This allows for a larger surface area to be provided with the same cell density of the honeycomb body and reduces unwanted accumulations of washcoat (or other coating) in these intersecting spaces.

[0036] The above statements regarding the first layer also apply in particular to the at least one second layer.

[0037] The described structured layers and honeycomb structure are generally known. Reference is made to previously known descriptions of layers and honeycomb structures.

[0038] The honeycomb structure is specifically designed for exhaust gas aftertreatment. Reference is made to the explanations in the introduction.

[0039] The honeycomb structure can have various shapes, including, in particular, a round, oval, polygonal, or similar cross-section. Often, such a honeycomb structure is formed with a tube-like casing (especially the sleeve).

[0040] In an exhaust aftertreatment application, exhaust gas / fluid regularly enters the honeycomb structure via the inlet side and exits via the outlet side. The inlet / outlet sides, which are preferably arranged essentially parallel or at an angle to each other, regularly define the length of the honeycomb structure in the axial direction.

[0041] A further exhaust system component is proposed, comprising at least a connecting pipe section and the described exhaust gas purification component. The connecting pipe section can be arranged (or is arranged, if an internal combustion engine is provided) between at least one combustion chamber of an internal combustion engine and the exhaust gas purification component, such that exhaust gas flowing from the at least one combustion chamber flows through the exhaust system component along a specific exhaust gas flow direction via the connecting pipe section and the exhaust gas purification component. The connecting pipe section extends along the flow direction across the inlet side and up to the connection section and is materially bonded to the connection section (in particular via a welded joint).

[0042] In particular, the connecting pipe section extends outside over the connection section and is then connected to an outer circumferential surface of the sleeve.

[0043] In particular, a circumferential free space is provided between the honeycomb structure and the connecting piece, so that the honeycomb structure and the connecting piece do not come into contact.

[0044] In particular, the connecting pipe section is at least part of an (generally known) exhaust manifold (i.e., a pipe that connects the at least one combustion chamber of an internal combustion engine to an exhaust pipe and is located directly on the engine block of the internal combustion engine) or an (generally known) exhaust gas turbocharger housing. Specifically, the connecting pipe section is the exhaust manifold or the exhaust gas turbocharger housing. An exhaust gas turbocharger comprises at least one turbine side and one compressor side. The exhaust gas is fed from the internal combustion engine to the turbine side, accelerates a turbine, and is thereby expanded. The expanded exhaust gas flows from the turbine side to the exhaust gas aftertreatment component.

[0045] The described exhaust gas purification component allows a honeycomb structure to be positioned in close proximity to the exhaust manifold or turbocharger, with the honeycomb structure extending beyond the sleeve towards the connecting pipe section. Particularly in combination with the surrounding free space, rapid heating of the honeycomb structure in the inlet area can be achieved. This rapid heating can then be further enhanced by the proposed special design of the honeycomb structure.

[0046] In particular, the connecting pipe piece is a metallic casting or a metallic sintered part, i.e., a metallic component produced by casting or sintering.

[0047] In particular, the exhaust system component additionally comprises a pipe section that is arranged downstream of the exhaust gas purification component along the flow direction (i.e., in the region of the first end of the sleeve or the downstream side of the honeycomb structure). If the honeycomb structure extends beyond the sleeve along the axial direction, the pipe section is materially bonded to the connecting section. Alternatively, if the sleeve extends at least to the downstream side or beyond the downstream side to the first end along the axial direction, the pipe section is materially bonded to the first end.

[0048] The pipe section can also be connected to the first end of the sleeve if the honeycomb structure extends beyond that end. In particular, the honeycomb structure is at least partially shielded from the surrounding exhaust system components by the sleeve. On the inlet side, the honeycomb structure may be additionally or at least partially enclosed exclusively by the connecting pipe section. On the outlet side, the honeycomb structure may be additionally or exclusively enclosed by the pipe section.

[0049] In particular, the exhaust system component additionally includes a deflection device which is arranged along the flow direction downstream of the exhaust gas purification component and via which the exhaust gas flowing out of the outflow side can be deflected, so that the sleeve can be exposed to the exhaust gas via an outer circumferential surface or is exposed to the exhaust gas in use.

[0050] In particular, such a deflection device is known from DE 10 2009 056 183 A1, wherein the centrally arranged honeycomb structure provided therein can be replaced, for example, by the honeycomb structure described above.

[0051] Furthermore, an exhaust system is proposed, at least comprising an internal combustion engine with at least one combustion chamber (or a plurality of combustion chambers) and the exhaust system component described.

[0052] Furthermore, the use of the exhaust gas purification component or exhaust system component in an exhaust system is proposed, e.g., of a motor vehicle or a stationary system that has an internal combustion engine with an exhaust system. The exhaust system has at least one catalyst support or a particulate separator, which is designed as the honeycomb structure described here. The catalyst support and / or the particulate separator may have a catalytically active coating.

[0053] The statements regarding the exhaust gas purification component are particularly applicable to the exhaust system component and the exhaust system, and vice versa. The use of indefinite articles ("a", "an", "one", and "ones"), especially in the patent claims and the description reproducing them, is to be understood as such and not as a numeral. Accordingly, terms or components introduced by these articles are to be understood as existing at least once and, in particular, as potentially existing multiple times.

[0054] It should be noted as a precaution that the numerical terms used here ("first", "second", etc.) primarily serve (only) to distinguish between several similar objects, quantities, or processes, and thus do not necessarily dictate any dependency and / or sequence between these objects, quantities, or processes. Should a dependency and / or sequence be required, this is explicitly stated here, or it will be obvious to a person skilled in the art upon studying the specific configuration described. Where a component can occur multiple times ("at least one"), the description of one of these components may apply equally to all or some of the multiple components, but this is not mandatory.

[0055] The invention and its technical context are explained in more detail below with reference to the accompanying figures. It should be noted that the invention is not limited by the exemplary embodiments shown. In particular, it should be noted that the figures, and especially the depicted dimensions, are only schematic. They show:

[0056] Fig. 1 : a first embodiment of an exhaust gas purification component in a perspective view;

[0057] Fig. 2: A first embodiment of an exhaust system component in a perspective view, partially in section; Fig. 3: A second embodiment of an exhaust system component in a perspective view, partially in section;

[0058] Fig. 4: the exhaust system component according to Fig. 3 in a different perspective view, partially in section;

[0059] Fig. 5: an exhaust system;

[0060] Fig. 6: a stack of layers in a perspective view; and

[0061] Fig. 7: the stack in a view along the width direction.

[0062] Fig. 1 shows a first embodiment of an exhaust gas purification component 1 in a perspective view.

[0063] The exhaust gas purification component 1 comprises a honeycomb body structure 2, which extends along an axial direction 3 between an inlet side 4 and an outlet side 5 and which is permeable to an exhaust gas 6 along the axial direction 3, and a sleeve 7, which extends around the honeycomb body structure 2 along a circumferential direction 8 transverse to the axial direction 3 with a fastening section 9 and a connection section 10.

[0064] The sleeve 7 is connected to the honeycomb structure 2 in the fastening section 9, relative to the axial direction 3, via an inner circumferential surface 11, at least by frictional connection. The connection section 10 extends from the fastening section 9 towards the inlet side 4 and is arranged along a radial direction 12 extending transversely to the axial direction 3 and transversely to the circumferential direction 8 at a distance 13 from the honeycomb structure 2, such that a clearance 14 is formed between the honeycomb structure 2 and the connection section 10, extending around the circumferential direction 8. The honeycomb structure 2 extends beyond the sleeve 7, so that the connection section 10 is arranged at a distance from the inlet side 4 along the axial direction 3.

[0065] The connection section 10 of the sleeve 7 extends from the fastening section 9 towards the inlet side 4. In doing so, the sleeve 7 widens, so that a circumferentially formed free space 14 exists between the sleeve 7 and the honeycomb body structure 2.

[0066] The honeycomb body structure 2 extends along the axial direction 3 beyond the sleeve 3 or the connection section 10, so that the (second) end of the sleeve 7 is spaced (at a distance) from the inlet side 4 along the axial direction 3.

[0067] This overhang of the honeycomb structure 2 relative to the sleeve 7 ensures that the honeycomb structure 2 heats up more quickly, especially in the area of ​​the inlet side 4 (e.g., during operation of an internal combustion engine 35 and when the honeycomb structure 2 is exposed to exhaust gas 6), because heat dissipation to the sleeve 7 can only occur convectively (due to the surrounding free space 14). This allows for effective exhaust gas treatment to begin as early as possible, particularly during a cold start.

[0068] The honeycomb structure 2 extends along the axial direction 3 beyond the fastening section 9 and the sleeve 7. The sleeve 7 thus extends from a (upstream) second end via the connection section 10 and the fastening section 9 to a first end 15, with the honeycomb structure 2 then extending beyond the first end 15 to the downstream side 5.

[0069] The free space 14 extends between the connection section 10 and the honeycomb body structure 2 along the axial direction 3 over a first length 16, wherein the honeycomb body structure 2 extends along the axial direction 3 beyond the sleeve 7 over a second length 17 (the overhang), wherein the second length 17 is greater than the first length 16.

[0070] In the illustrated embodiment, the first length 16 is approximately 10% of the largest diameter of the honeycomb structure 2 extending transversely to the axial direction 3. The second length 17 is approximately 200% of the first length 16.

[0071] Fig. 2 shows a first embodiment of an exhaust system component 32 in a perspective view, partially in section. Fig. 3 shows a second embodiment of an exhaust system component 32 in a perspective view, partially in section. Fig. 4 shows the exhaust system component 32 according to Fig. 3 in another perspective view, partially in section. Figs. 2 to 4 are described together below. Reference is made to the description of Fig. 1.

[0072] The exhaust system component 32 comprises a connecting pipe section 33 and an exhaust gas purification component 1 (according to the second embodiment). The exhaust gas purification component 1 shown here differs from Fig. 1 in that the sleeve 7 extends along the axial direction 3 at least to the outflow side 5 or even (just) beyond the outflow side 5 to a first end 15 of the sleeve 7.

[0073] The connecting pipe section 33 in Fig. 2 is an exhaust manifold (i.e., a pipe that connects the at least one combustion chamber 34 of an internal combustion engine 35 to an exhaust pipe and is arranged directly on the engine block of the internal combustion engine 35). The connecting pipe section 33 in Figs. 3 and 4 is an exhaust gas turbocharger housing (also known in principle).

[0074] The connecting pipe section 33 is designed as a single metallic casting. The connecting pipe section 33 can be arranged (or is arranged if an internal combustion engine 35 is provided) between at least one combustion chamber 34 of an internal combustion engine 35 and the exhaust gas purification component 1, so that exhaust gas 6 flowing out of the at least one combustion chamber 34 flows along a flow direction 36 of the exhaust gas 6 via the connecting pipe section 33 and the exhaust gas purification component 1 through the exhaust gas system component 32. The connecting pipe section 33 extends along the flow direction 36 across the inlet side 4 and up to the connection section 10 and is metallurgically bonded (e.g., via a welded connection) to the connection section 10.

[0075] The connecting pipe section 33 extends externally over the connection section 10 and is connected to an outer circumferential surface 39 of the sleeve 7.

[0076] A circumferential free space is also provided between honeycomb structure 2 and connecting piece 33, so that the honeycomb structure 2 and the connecting piece 33 do not contact each other.

[0077] With the described exhaust gas purification component 1, a honeycomb structure 2 can be arranged in the immediate vicinity of the exhaust manifold or the exhaust gas turbocharger, with the honeycomb structure extending beyond the sleeve 7 towards the connecting pipe section 33. Particularly in combination with the surrounding free space 14, rapid heating of the honeycomb structure 2 in the area of ​​the inlet side 4 can be achieved. This rapid heating can then be further improved in combination with the proposed special design of the honeycomb structure 2.

[0078] Fig. 5 shows an exhaust system 40. Reference is made to the descriptions of Figs. 1 to 4.

[0079] The exhaust system 40 comprises an internal combustion engine 35 with at least one combustion chamber 34 (or a plurality of combustion chambers 34) and an exhaust system component 32. The connecting pipe section 33 is designed here as an exhaust gas turbocharger, wherein the exhaust gas 6 from the combustion chamber 34 is fed to the exhaust gas purification component 1 via the turbine side of the exhaust gas turbocharger. Fresh air is compressed via the compressor side of the exhaust gas turbocharger and supplied to the combustion chamber 34 (see arrows in Fig. 5). The connecting pipe section 33 is conically shaped between the turbine side and the connection section 10.

[0080] The exhaust system component 32 additionally comprises a pipe section 37, which is arranged along the flow direction 36 downstream of the exhaust gas purification component 1 (i.e., in the region of the first end 15 of the sleeve 7 or the outflow side 5 of the honeycomb structure 2). The pipe section 37 is connected to the first end 15 of the sleeve 7, with the honeycomb structure 2 extending beyond the first end 15 to the end of the pipe section 37.

[0081] The exhaust system component 32 additionally comprises a deflection device 38, which is arranged along the flow direction 36 downstream of the exhaust gas purification component 32 and via which the exhaust gas 6 flowing out of the outflow side 5 can be deflected, so that the sleeve 7 or the pipe section 37 can be exposed to the exhaust gas 6 via an outer circumferential surface 39 or is exposed to the exhaust gas 6 in use.

[0082] The honeycomb structure 2 is at least partially shielded from the surrounding environment 41 of the exhaust system component 32, i.e., only by the sleeve 7. In the area of ​​the inlet side 4, the honeycomb structure 2 is additionally or at least partially exclusively enclosed by the connecting pipe section 33. In the area of ​​the outlet side 5, the honeycomb structure 2 is enclosed by the pipe section 37 and by the deflector 38. The exhaust gas 6 thus flows along the flow direction 36 through the honeycomb structure 2 and via the outlet side 5 into the deflector 38. In the deflector 38, the exhaust gas 6 is deflected and flows over the outer circumferential surface 39 of the pipe section 37 or the sleeve 7 through another honeycomb structure 2 towards an exhaust pipe 42 connected to the deflector 38. Fig. 6 shows a stack 19 of layers 20, 30 in a perspective view. Fig. 7 shows the stack 19 in a view along the width direction 22. The Fig.Figures 6 and 7 are described together below. Reference is made to the explanations for Figures 1 to 5.

[0083] The honeycomb structure 2 has channels 18 extending between the inlet side 4 and the outlet side 5, so that the honeycomb structure 2 is permeable to the exhaust gas 6; wherein the honeycomb structure 2 comprises a stack 19 formed by a first layer 20 and a second layer 30 (structured, i.e. having a structure, i.e. not smooth), each having a corrugated structure 21. The layers 20, 30 extend between the inlet side 4 and the outlet side 5 along a lateral direction 22 parallel to the axial direction 3 and along a longitudinal direction 23 perpendicular to the axial direction 3 between a first layer end 24 and a second layer end 25. The wave structure 21 of the layers 20, 30 has a plurality of parallel wave troughs 26 and wave crests 27, each inclined at an angle 28 to the lateral direction 22 of approximatelyThe stack 19 and the channels 18 extend at an angle of 10 degrees along a direction 29. They are formed by arranging another structured area of ​​the same first layer 20 or by arranging a structured second layer 30 on top of the first layer 20. The other area of ​​the first layer 20 or the second layer 30 is structured such that the superimposed wave troughs 26 and wave crests 27 intersect, thus defining a contact zone 31 between the wave troughs 26 and wave crests 27 along the direction 29.

[0084] The corrugated structure 21 is such that the crests 27 and troughs 26 in adjacent areas (viewed in the radial direction 12) are inclined differently with respect to the axial direction 3, or have a different orientation. For example, if there is a deflection to the right in one area, it is preferred that the deflection to the left occurs in the area further inward, and vice versa. This orientation of the corrugated structure 21 alternates continuously when viewed in the radial direction 12. This results in the crests 27 and troughs 26 not lying on top of each other in a linear fashion at any point on the honeycomb structure 2, but rather intersecting each other and thus essentially forming only point-like contact points or contact zones 31. This creates a structure in which the partial flows of the exhaust gas 6 are permanently deflected and can flow into adjacent crests 27 or troughs 26, particularly in a zigzag pattern.

[0085] Reference symbol list

[0086] 1 Exhaust gas purification component

[0087] 2 honeycomb body structure

[0088] 3 axial direction

[0089] 4 Inlet side

[0090] 5. Outflow side

[0091] 6 Exhaust gas

[0092] 7 Sleeve

[0093] 8 Circumferential direction

[0094] 9 Mounting section

[0095] 10 Connection section

[0096] 11 inner circumferential surface

[0097] 12 radial direction

[0098] 13 distance

[0099] 14 Free space

[0100] 15 first end

[0101] 16 first length

[0102] 17 second length

[0103] 18-channel

[0104] 19 stacks

[0105] 20 first layer

[0106] 21 Well structure

[0107] 22 Latitude

[0108] 23 Direction of extension

[0109] 24 first layer end

[0110] 25 second layer end

[0111] 26 troughs

[0112] 27 wave crest

[0113] 28 tilt angles

[0114] 29 Direction of travel

[0115] 30 second layer 31 contact zone

[0116] 32 Exhaust system component

[0117] 33 Connecting cable piece

[0118] 34 Combustion chamber 35 Internal combustion engine

[0119] 36 Flow direction

[0120] 37 pipe sections

[0121] 38 Deflection device

[0122] 39 outer circumferential area 40 exhaust system

[0123] 41 Surroundings

[0124] 42 Exhaust pipe

Claims

Patent claims 1. Exhaust gas purification component (1), comprising at least a honeycomb structure (2) extending along an axial direction (3) between an inlet side (4) and an outlet side (5) and through which exhaust gas (6) can flow along the axial direction (3), and a sleeve (7) extending around the honeycomb structure (2) along a circumferential direction (8) extending transversely to the axial direction (3) with a fastening section (9) and a connection section (10); wherein the sleeve (7) is at least force-fit connected to the honeycomb structure (2) in the fastening section (9) via an inner circumferential surface (11);wherein the connection section (10) extends from the fastening section (9) towards the inlet side (4) and is arranged along a radial direction (12) extending transversely to the axial direction (3) and transversely to the circumferential direction (8) at a distance (13) from the honeycomb body structure (2), so that a clearance (14) circumferentially extending along the circumferential direction (8) is formed between the honeycomb body structure (2) and the connection section (10); wherein the honeycomb body structure (2) extends beyond the sleeve (7), so that the connection section (10) is arranged along the axial direction (3) at a distance from the inlet side (4).

2. Exhaust gas purification component (1) according to claim 1, wherein the honeycomb body structure (2) extends along the axial direction (3) beyond the fastening section (9) and the sleeve (7).

3. Exhaust gas purification component (1) according to claim 1, wherein the sleeve (7) extends along the axial direction (3) at least to the outflow side (5) or beyond the outflow side (5) to a first end (15).

4. Exhaust gas purification component (1) according to one of the preceding claims, wherein the free space (14) between the - 22 - The connection section (10) and the honeycomb body structure (2) extend along the axial direction (3) over a first length (16), wherein the honeycomb body structure (2) extends along the axial direction (3) beyond the sleeve (7) over a second length (17), wherein the second length (17) is at least equal to the first length (16).

5. Exhaust gas purification component (1) according to one of the preceding claims, wherein the honeycomb structure (2) has channels (18) extending between the inlet side (4) and the outlet side (5) so that the honeycomb structure (2) is permeable to the exhaust gas (6); wherein the honeycomb structure (2) comprises at least one stack (19) formed by at least one first layer (20) having a corrugated structure (21), wherein the first layer (20) extends between the inlet side (4) and the outlet side (5) along a lateral direction (22) parallel to the axial direction (3) and along a longitudinal direction (23) transverse to the axial direction (3) between a first layer end (24) and a second layer end (25);wherein the wave structure (21) of the first layer (20) has a plurality of parallel wave troughs (26) and wave crests (27), each extending at an angle (28) to the latitude direction (22) of greater than zero degrees and at most 45 degrees along a direction (29); wherein the stack (19) and the channels (18) are formed by arranging another structured region of the same first layer (20) or by arranging a structured second layer (30) on top of the first layer (20); wherein the other region of the first layer (20) or the second layer (30) is structured such that the overlapping wave troughs (26) and wave crests (27) intersect, thus defining a contact zone (31) between the wave troughs (26) and wave crests (27) along the direction (29).

6. Exhaust system component (32), comprising at least a connecting pipe section (33) and an exhaust gas purification component (1) according to one of the preceding claims, wherein the connecting pipe section (33) can be arranged between at least one combustion chamber (34) of an internal combustion engine (35) and the exhaust gas purification component (1), such that an exhaust gas (6) flowing out of the at least one combustion chamber (34) flows along a flow direction (36) of the exhaust gas (6) via the connecting pipe section (33) and the exhaust gas purification component (1) through the exhaust gas system component (32); wherein the connecting pipe section (33) extends along the flow direction (36) over the inlet side (4) and up to the connection section (10) and is materially connected to the connection section (10).

7. Exhaust system component (32) according to claim 6, wherein the connecting pipe section (33) is at least a part of an exhaust manifold or an exhaust turbocharger housing.

8. Exhaust system component (32) according to one of the preceding claims 6 and 7, wherein the connecting pipe section (33) is a metallic casting.

9. Exhaust system component (32) according to one of the preceding claims 6 to 8, further comprising a pipe section (37) that is arranged along the flow direction (36) downstream of the exhaust gas purification component (1) and that, if the honeycomb body structure (2) extends along the axial direction (3) beyond the sleeve (7), is materially connected to the connecting section (10) or, if the sleeve (7) extends along the axial direction (3) at least to the outflow side (5) or beyond the outflow side (5) to a first end (15), is materially connected to the first end (15).

10. Exhaust system component (32) according to one of the preceding claims 6 to 9, further comprising a deflecting device (38) which is arranged along the flow direction (36) downstream of the exhaust gas purification component (1) and via which the exhaust gas (6) flowing out of the outflow side (5) can be deflected, so that the sleeve (7) can be acted upon by the exhaust gas (6) via an outer circumferential surface (39).

1. Exhaust system (40), comprising at least an internal combustion engine (35) comprising at least one combustion chamber (34) and an exhaust system component (32) according to any one of the preceding claims 6 to 10. - 25 -

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