DE102015220126A1 - Exhaust gas component, method for producing such an exhaust gas component, and device for carrying out the method - Google Patents

Abstract

The invention relates to an exhaust gas component (1) having a - rectangular in cross-section - arrangement of at least one - seen in cross-section - rectangular exhaust aftertreatment element (3); a housing (5), which surrounds the - viewed in cross section - rectangular arrangement, wherein the housing (5) has a rectangular cross section and along a diagonal (D) of the cross section in two housing parts (7, 9) is divided. It is provided that the housing (5) is arranged under compressive stress in an outer housing (11).

Description

The invention relates to an exhaust gas component, a method for producing such an exhaust gas component, and an apparatus for carrying out such a production process.

From the US 2011/0030355 A1 an exhaust gas component is known, which has a plurality of - seen in cross-section - rectangular exhaust aftertreatment elements. The exhaust gas component has a housing that surrounds the exhaust gas aftertreatment elements arranged in a rectangular arrangement relative to one another, as seen in cross section, the housing having a rectangular cross section and being divided into two housing parts along a diagonal of the cross section. The two housing parts are welded together. The disadvantage here is that the production of the exhaust gas component is complicated due to the welding of the housing parts, which are rigidly fixed together by the weld joint. A disassembly of the exhaust gas component - for example, for maintenance or replacement purposes, for example, to replace an exhaust aftertreatment element - is hardly possible or only with great effort.

The invention has for its object to provide an exhaust gas component, a method for producing such an exhaust gas component and an apparatus for performing such a manufacturing method, wherein said disadvantages do not occur.

The object is achieved by providing the subject matters of the independent claims. Advantageous embodiments emerge from the subclaims.

The object is achieved in particular by providing an exhaust gas component which has at least one - viewed in cross section - rectangular exhaust gas treatment element, preferably a plurality of - seen in cross section - rectangular exhaust aftertreatment elements, and a housing, which - seen in cross section - to a rectangular Arrangement arranged relative to one another exhaust gas aftertreatment elements or the at least one - seen in cross section - rectangular exhaust aftertreatment element, which in this case taken by itself forms a rectangular cross-sectional arrangement surrounds, wherein the housing has a rectangular cross section and along a diagonal of the rectangular cross section in two housing parts shared. It is provided that the housing is arranged under compressive stress in an outer housing. Characterized in that the housing parts are not welded together, but rather are arranged under compressive stress in the outer housing, a mounting of the exhaust gas component is greatly simplified. Preferably, however, the housing parts are welded to the outer housing, in particular each housing part, each with a weld. For maintenance and / or replacement purposes, the housing in a simple manner - possibly after loosening a weld - removed from the outer housing, for example, be pulled out, so that a faster, easier and cheaper exchange of exhaust aftertreatment elements or the entire housing including the exhaust aftertreatment results.

The housing parts are preferably urged against each other on adjacent housing edges under tension. They are in particular not rigidly connected to each other, but arranged under elastic bias in the outer housing.

Under an exhaust gas component is in particular a device to understand the exhaust aftertreatment in an exhaust-carrying line system, in particular an exhaust line, especially an internal combustion engine is set up. In this case, the exhaust gas component in particular has an enclosure, here in particular the outer housing, which preferably also has connection points for integration into an exhaust gas line, in particular for the supply and removal of exhaust gas. Furthermore, the exhaust gas component can be handled on its housing. The exhaust gas component is in particular designed to carry out a specific exhaust aftertreatment, for example formed as an oxidation catalyst, as an SCR catalyst for the selective catalytic reduction of nitrogen oxides, or as a particle filter. However, an exhaust gas component can also have more than one such function.

An exhaust gas aftertreatment element is, in particular, a device which is set up specifically for carrying out a specific exhaust gas aftertreatment, wherein it is at the same time set up for arrangement and use in an exhaust gas component. The exhaust gas aftertreatment element preferably has a carrier body and a catalytically active coating arranged on the carrier body. The carrier body is preferably a ceramic body, in particular a ceramic catalyst carrier. The catalytically active coating can be, for example, an oxidation catalyst or an SCR catalyst suitable for the selective catalytic reduction of nitrogen oxides. The exhaust aftertreatment element can also be designed as a particle filter element, wherein it is preferably in this case a porous filter body, in particular a porous ceramic body as a filter body having.

The housing, which is arranged under compressive stress in the outer housing, is in particular designed as an inner housing. Overall, therefore, the exhaust gas component preferably has an inner housing, which in turn has two housing parts, and an outer housing, which engages around the inner housing in the assembled state, wherein the inner housing is arranged in the outer housing under compressive stress.

"Compression voltage" is understood in particular that the arrangement of the housing, namely the two housing parts, and the at least one exhaust aftertreatment element - which is also referred to as a compression unit - is elastically yielding, in particular the housing parts elastically on each other and the at least one exhaust aftertreatment element or the plurality of exhaust aftertreatment elements may be forced inward, which is referred to as compression. Under compression stress so the housing parts of the housing are further towards each other and in particular displaced inward than in a relaxed state in which no effect compression of the arrangement of the housing parts and the exhaust aftertreatment elements forces. The elasticity of the arrangement may in particular result from the properties, in particular shape and / or material properties, of the housing parts, the geometric arrangement of the housing parts relative to one another, and / or additionally provided compression elements, in particular compression mats.

Preferably, the housing parts have a wall thickness of at least 0.5 mm to at most 1.5 mm, in particular of 1 mm, whereby they receive a resilient, elastic training.

The fact that the housing parts are urged against each other on adjacent housing edges under tension means, in particular, that housing edges of the housing parts exist that extend perpendicular to a cross-sectional plane of the exhaust gas component, and which are opposite where the diagonal of the cross section of the housing in the two housing parts divides, in particular where a diagonal plane in which the corresponding diagonal runs intersects the cross-sectional plane. The housing parts are preferably dimensioned such that the housing edges are in the assembled but uncompressed state of the exhaust gas component at a distance from each other, wherein they are by compression of the exhaust gas component against each other or to each other to be pressed. It is possible that they touch each other in a compressed state, but it is also possible that the housing edges even in the compressed state yet another - but then compared to the relaxed state lower - distance from one another.

A cross-section is understood here to mean a view of the exhaust gas component and / or a part or element of the exhaust gas component in a plane on which a longitudinal direction of the exhaust gas component is perpendicular. The longitudinal direction of the exhaust gas component is in particular a direction along which the exhaust gas component flows during operation of an exhaust gas flow. In particular, a flow path for the exhaust gas extends through the exhaust gas after-treatment elements from an upstream end side to a downstream end side thereof in the longitudinal direction.

The housing and in particular also the exhaust gas component as a whole is / are preferably of cuboid design. Alternatively or additionally, it is preferably provided that the exhaust gas aftertreatment elements are cuboidal. A longest edge of such a cuboid preferably extends in the longitudinal direction, with shorter edges of the cuboid extending in the cross-sectional plane. It is possible that the exhaust gas component and / or the exhaust aftertreatment elements have a square cross section, wherein preferably the two shorter edges which are shorter than the longest edge, are the same length.

It is also possible that different exhaust aftertreatment elements have different geometries, so that, for example, a first exhaust aftertreatment element may have a square cross section and a second exhaust aftertreatment element may have a rectangular, non-square cross section.

An edge length of the housing is preferably an integer multiple of an edge length of an exhaust gas aftertreatment element, wherein here the factor 1 is included. In particular, it is possible for only one exhaust gas aftertreatment element to be provided in the housing, as seen in the longitudinal direction, at least one, two or more exhaust aftertreatment element (s) being arranged along at least one transverse direction. It is additionally or alternatively possible that seen in the longitudinal direction, more than one exhaust aftertreatment element is arranged one behind the other.

The exhaust gas component preferably has a plurality of identically formed, in particular geometrically identically designed, exhaust gas aftertreatment elements. These preferably as such cuboid Exhaust aftertreatment elements can then in turn be assembled into a generally parallelepiped arrangement by secondary and / or series arrangement of the exhaust gas aftertreatment elements. The housing then preferably has corresponding edge lengths that correspond to the corresponding singular or plurality of exhaust aftertreatment elements along the different directions.

Also, the outer housing preferably has corresponding edge lengths.

The outer housing is further preferably dimensioned so that the compression unit can be arranged under compression stress in the outer housing. For this purpose, the outer housing in particular corresponding to the desired compression stress on smaller selected outer edges, as it corresponds to the outer edges of the compression unit of the housing parts and the exhaust aftertreatment elements in the relaxed state.

According to one embodiment of the invention it is provided that the housing parts are formed as - seen in cross section - L-shaped sheet metal elements. In particular, the housing parts are preferably formed as angularly folded sheet metal shell halves. The housing parts are particularly simple and quick and inexpensive to produce in this case. An edge length of the metal jacket halves measured in the longitudinal direction is preferably approximately an integer multiple of a corresponding edge length of the exhaust gas aftertreatment elements; an edge length of the metal shell halves measured in the cross-sectional plane is preferably an integer multiple of a corresponding edge length of the exhaust aftertreatment elements, wherein the integer multiple refers in particular to the number of exhaust aftertreatment elements actually arranged along a particular direction in the arrangement. Here, an integer multiple also includes the factor 1 here.

Preferably, an edge length of a housing edge measured in the cross-sectional plane of at least one of the housing parts is smaller than a length of an arranged in this state at this housing edge fitting edge of the arrangement of the at least one exhaust aftertreatment element or the exhaust aftertreatment elements in the relaxed state. These are not the housing edges, which are adjacent to each other in the compression or are displaced to each other, but to this vertically oriented housing edges, which are arranged parallel to lying in the cross-sectional plane arrangement edges of the arrangement of exhaust aftertreatment elements. The fact that these housing edges have a smaller edge length than the arrangement edges, there is a distance between the perpendicular to the cross-sectional plane extending housing edges, which are urged toward each other in a compressed state. The corresponding configuration therefore makes it possible to compress the arrangement while displacing the housing parts towards one another.

According to one embodiment of the invention, it is provided that the housing parts have positive locking elements on the housing edges which are adjacent to one another in the mounted state, the interlocking elements being arranged to engage in one another in the assembled state. In this case, the form-fitting elements are particularly preferably designed so that they already engage in an uncompressed state, thus in a relaxed state. In this way, the housing parts can be aligned by means of the positive locking elements relative to each other. The form-locking elements are designed so that their engagement can deepen in the compressed state, so that the housing parts can be moved towards each other.

According to one embodiment of the invention, it is provided that at least one compression mat is arranged between at least one exhaust gas aftertreatment element and the housing. Alternatively or additionally, at least one compression mat is preferably arranged between at least two exhaust-gas aftertreatment elements. On the one hand, such compression mats provide elasticity for the compression unit of the exhaust aftertreatment elements, the housing parts and the compression mats, preferably in addition to the elastic configuration of the housing parts. Preferably, such a compression mat is at least partially disposed between each exhaust aftertreatment element and an adjacent exhaust aftertreatment element, more preferably, a compression mat being disposed between each exhaust aftertreatment element and a housing part adjacent thereto. In this way, a particularly good compressibility is achieved at the same time optimized gas-tightness for the arrangement.

According to one embodiment of the invention, it is provided that a plurality of identical compression mats are provided, wherein each compression mat has at least one slot, wherein preferably at least two compression mats are arranged nested. This represents a particularly simple embodiment of the compression mats because they can be manufactured as equal parts. Furthermore, the Compression mats can be easily arranged in the exhaust gas component, by putting these into each other and placed between or on the exhaust aftertreatment elements. In particular, it requires no complicated wrapping of exhaust aftertreatment elements with compression mats.

Particularly preferably, at least two compression mats are arranged with their slots in one another. In particular, it is possible that the compression mats have a central, central slot, which preferably extends from a mat edge over a certain area in the compression mat, for example approximately to a center of the compression mat, wherein two compression mats arranged in a cross shape and preferably perpendicular to each other and with their middle slots can be plugged into each other. Such an arrangement of compression mats is particularly suitable for a central, central arrangement in the exhaust gas component between the exhaust aftertreatment elements.

Preferably, the compression mats each have a central slot and two open-edged lateral recesses extending in regions along mat edges of the compression mats. A remaining area of the edges then virtually forms a projection relative to the position of the mat edge in the region of the recess. The compression mats are preferably arranged so that they engage with their slots and / or with the projections and recesses. In particular, as already described, two mats can be arranged crosswise in the middle between four exhaust aftertreatment elements, wherein they mesh with their central slot. Additionally or alternatively, it is possible for at least one compression mat to be arranged on each outer side of the arrangement of exhaust aftertreatment elements, wherein the compression mats arranged on adjacent or adjoining sides each engage with a projection in a recess of the adjacent mat. For this purpose, the laterally arranged compression mats are preferably arranged in different orientations, so that in each case a projection comes with a recess for covering.

According to one embodiment of the invention it is provided that the housing parts have frontal, inwardly directed housing flanges. By a front side is meant a side which is oriented parallel to a cross-sectional plane, and on which, in particular, a main flow direction of exhaust gas is perpendicular during operation of the exhaust gas component. The frontal, inwardly directed housing flanges of the housing parts can be used in a particularly simple and effective manner to apply press-in forces for pressing the housing with the arrangement of at least one exhaust aftertreatment element in the outer housing on the housing parts, or to initiate them.

Preferably, the housing parts additionally or alternatively each have at least one pullout element which is adapted to pull the housing parts by means of the pullout element together with the arrangement of the exhaust aftertreatment elements from the outer housing, in particular for maintenance or replacement purposes of the exhaust aftertreatment elements, and / or for handling - in particular by means of a crane - the exhaust component. The pull-out elements are preferably configured as eyelets, which in particular can be arranged on the bevelled edges of the angular shell-shaped housing parts designed as sheet-metal shell halves, preferably welded there.

The housing parts are preferably welded to the outer housing in the region of the pull-out elements, in particular between a respective pull-out element and the outer housing, by means of a weld seam which is preferably 50 mm long.

The housing flanges preferably have exemptions for the pull-out elements, or extend only over a length which leaves room for the pull-out elements.

According to one embodiment of the invention, it is provided that the outer housing has frontally outwardly directed outer housing flanges having flange positive locking elements. These outer housing flanges are preferably provided to arrange the outer housing in turn in a parent exhaust housing and fasten there. In particular, it is possible to arrange a plurality of outer housings in such a superordinate exhaust gas housing. The flange positive locking elements serve to align the various outer housing relative to each other, they can arrange closer to each other and thereby save space. For this purpose, the flange positive-locking elements are preferably designed as a succession of projections and recesses along edges of the outer housing flanges, wherein these are configured and / or oriented such that adjacent outer housings can interengage with their projections and recesses. In particular, it is possible that the configuration with respect to the arrangement of the projections and recesses on a first outer housing flange is designed to be complementary to a corresponding configuration on a second, on an opposite side - Seen in cross section - arranged outer housing flange, so that adjacent to one of these sides adjacent, identical outer housing can engage with the projections and recesses of their Außengehäuseflansche.

The design of the outer housing flanges with projections and recesses also saves material in the flange area.

The object is also achieved by providing a method for producing an exhaust gas component, wherein within the scope of the method an exhaust gas component according to one of the exemplary embodiments described above is preferably produced. The method comprises the following steps: An L-shaped first housing part is provided, viewed in cross-section. At least one - seen in cross-section - rectangular, preferably square, exhaust aftertreatment element or a plurality of - seen in cross section - rectangular, preferably square, exhaust aftertreatment elements is arranged on the first housing part to - seen in cross-section - rectangular, preferably square, arrangement. A - seen in cross section - L-shaped, second housing part is placed on the arrangement of the exhaust aftertreatment element or the exhaust aftertreatment elements. As a result, a compression unit is produced. This compression unit has the first housing part, the arrangement of at least one exhaust gas aftertreatment element, preferably - as will be explained - at least one compression mat, and the second housing part. A compression force is applied to the housing parts, compressing the compression unit. In this case, compression of the compression unit is understood to mean, in particular, that the housing parts are urged against each other or against one another with housing edges arranged adjacently to one another under tension. The compression unit is then pressed under compression stress in an outer housing. In connection with the method, in particular, the advantages that have already been explained in connection with the exhaust gas component.

According to a development of the invention, it is provided that at least one compression mat is arranged between at least one exhaust gas aftertreatment element and at least one housing part, and / or between at least two exhaust aftertreatment elements. Preferably, a plurality of compression mats is used, wherein in particular compression mats are arranged between adjacent exhaust aftertreatment elements and between the exhaust aftertreatment elements and housing parts adjacent to them.

According to one embodiment of the invention it is provided that the first housing part is arranged on a holding device, wherein the holding device has a - seen in cross-section - L-shaped bearing surface. In this case, the first housing part is arranged in particular on the support surface. A tip - or a knee - of the L-shaped bearing surface preferably has - as seen in the direction of gravity - down, so that the first housing part can be safely, stably and firmly placed on the support surface.

It is possible that the first housing part is placed directly on the support surface. In this case, the support surface preferably has at least one recess for arranging at least one tensioning bracket in the support surface or below the support surface. The clamping bracket can thus be arranged below the first housing part, wherein later, the housing parts can be clamped by means of the clamping bracket. Alternatively, it is possible that at least one clamping bracket is arranged on the support surface, wherein the first housing part in turn is arranged on the at least one clamping bracket. The first housing part is arranged indirectly on the support surface. Also in this case, the clamping bracket is arranged under the first housing part and can be used later for tensioning the compression unit.

Particularly preferred are two clamping brackets are used, which - seen in the longitudinal direction - are arranged spaced from each other, which allows a particularly stable tension of the housing parts.

It is possible that first or at least a first tensioning bow part is arranged on or in the bearing surface, in particular a first tensioning bow half which is later completed with a second tensioning bow part or a second tensioning bow half to form a clamping strap which encompasses the compression unit along its entire circumference. The tension can be applied in this case in particular by the two clamping strap parts or clamping bracket halves are clamped together. Particularly preferably, two clamping strap parts or clamping halves are used in each case, so that in particular two clamping bars result. Such a clamp member or a clamping bracket half is preferably designed L-shaped.

A refinement of the invention is preferred, in which it is provided that the compression force is applied to the housing parts by means of at least one tensioning clamp stretched around the compression unit, preferably by means of a plurality of tensioned around the compression unit Clamp, in particular with two straps, is applied.

The clamping yokes are preferably designed as already explained above.

Preferably, the at least one clamping bracket on at least one clamping stop, which prevents over-pressing by over-tightening the clamping bracket. The tension stop is preferably formed or arranged on at least one tension bow part.

It is possible that the compressed compression unit with the clamping straps is first inserted end-to-end in the outer housing, in which case the compression unit is pressed out of the clamping straps and into the outer housing. Alternatively, it is possible that after the end-side insertion of the compression unit in the outer housing, the clamping bracket - are solved - preferably successively - while the compression unit is pressed into the outer housing. A loosening of the clamping bracket can in particular take place when the compression unit is already securely held by the outer housing in its compressed position so that they can not fall apart.

According to one embodiment of the invention it is provided that the compression unit is pressed by applying a pressing force on the front side, inwardly directed housing flanges of the housing parts in the outer housing. As already described, the housing flanges can be used in a simple and advantageous manner to introduce a corresponding pressing force into the compression unit.

The object is also achieved by providing an apparatus for carrying out a method according to one of the previously described embodiments. This device has a holding device with a - seen in cross section - L-shaped bearing surface, in addition at least one clamping bracket for applying the compressive force on the housing parts. The device is preferably designed as already explained in connection with the method. This results in particular in the advantages that have already been explained in connection with the method and the exhaust gas component.

Preferably, the device has at least one stop element for aligning the housing parts, the exhaust aftertreatment elements and / or the compression mats.

The device preferably has a press device for pressing the compression unit into the outer housing.

Preferably, the device has two clamping brackets. Preferably, the at least one clamping bracket on two clamping bracket parts or clamping bracket halves, which can be clamped together.

According to one embodiment of the invention it is provided that the clamping bracket can be arranged with a first clamp member on the support surface, or that the support surface has at least one recess for at least a first clamp member of the clamping bracket. Particularly preferred are two clamping brackets, each with a first clamp member on the support surface can be arranged, or the support surface has two recesses for two clamping strap parts.

In general, depending on a length of the exhaust gas component and more than two clamps can be used.

The invention finally also includes an internal combustion engine which has an exhaust gas component according to one of the previously described embodiments. In connection with the internal combustion engine, in particular, the advantages that have already been explained in connection with the exhaust gas component. The exhaust gas component is set up and arranged for the aftertreatment of exhaust gas of the internal combustion engine.

The internal combustion engine is preferably designed as a reciprocating engine. It is possible that the internal combustion engine is arranged to drive a passenger car, a truck or a commercial vehicle. In a preferred embodiment, the internal combustion engine is used to drive in particular heavy land or water vehicles, such as mine vehicles, trains, the internal combustion engine is used in a locomotive or a railcar, or ships. It is also possible to use the internal combustion engine to drive a defense vehicle, for example a tank. An exemplary embodiment of the internal combustion engine is preferably also stationary, for example, used for stationary power supply in emergency operation, continuous load operation or peak load operation, the internal combustion engine in this case preferably drives a generator. A stationary application of the internal combustion engine for driving auxiliary equipment, such as fire pumps on oil rigs, is possible. Furthermore, an application of the internal combustion engine in the field of promoting fossil raw materials and in particular fuels, for example oil and / or gas, possible. It is also possible to use the internal combustion engine in the industrial sector or in the field of construction, for example in a construction or construction machine, for example in a crane or an excavator. The internal combustion engine is preferably designed as a diesel engine, as a gasoline engine, as a gas engine for operation with natural gas, biogas, special gas or another suitable gas. In particular, when the internal combustion engine is designed as a gas engine, it is suitable for use in a cogeneration plant for stationary power generation.

The description of the exhaust gas component, the device for carrying out the method and the internal combustion engine on the one hand, as well as the method on the other hand are to be understood complementary to each other. Features of the exhaust gas component, the device, and the internal combustion engine that have been explicitly or implicitly described in connection with the method are preferably individually or combined features of a preferred embodiment of the exhaust gas component, the device and / or the internal combustion engine. Method steps that have been explicitly or implicitly described in connection with the exhaust gas component, the device and / or the internal combustion engine are preferably individually or combined with each other steps of a preferred embodiment of the method. This is preferably characterized by at least one method step, which is due to at least one feature of an inventive or preferred embodiment of the exhaust gas component, the device and / or the internal combustion engine. The exhaust gas component, the device and / or the internal combustion engine preferably draws / distinguishes itself by at least one feature, which is due to at least one process step of a preferred embodiment of the method according to the invention or preferred embodiment.

The invention will be explained in more detail below with reference to the drawing. Showing:

1 an exploded view of an embodiment of an exhaust component with composite compression unit and outer housing;

2 a representation of the embodiment of the exhaust gas component according to 1 in assembled condition;

3 a representation of the arrangement of compression mats according to the embodiment of the exhaust gas component according to 1 ;

4 a representation of an embodiment of an apparatus for producing an exhaust gas component, and

5 a representation of an arrangement of a plurality of exhaust gas components in plan view.

1 shows an overall exploded view of an embodiment of an exhaust gas component 1 , where in 1a) a plurality of - seen in cross section - rectangular, in particular square, exhaust aftertreatment elements 3 are shown in a housing 5 are arranged. Specifically, here are four in cross-section square exhaust aftertreatment elements 3 , which are preferably formed as a ceramic catalyst carrier, relative to each other and in the housing 5 arranged that the arrangement of the exhaust aftertreatment elements 3 itself is square, with two exhaust aftertreatment elements 3 are arranged side by side in two directions of the cross-sectional plane, so that each edge of the overall square arrangement of two rear or adjacent edges of the exhaust aftertreatment elements 3 is formed. In the embodiment shown here, only one exhaust aftertreatment element is seen in the longitudinal direction 3 provided so that ultimately the arrangement itself and the housing 5 the length of about an exhaust aftertreatment element 3 , preferably a slightly longer length.

The housing 5 surrounds the exhaust aftertreatment elements arranged relative to one another 3 , It itself has a rectangular, square cross section here and is divided along a diagonal D arranged here into two housing parts, namely in a first housing part 7 and a second housing part 9 ,

The housing 5 and the exhaust aftertreatment elements 3 together form - preferably with at least one compression mat - a compression unit 10 ,

In 1b) is an outer casing 11 shown in which the housing 5 in the assembled state under compression tension can be arranged. In this case, preferably in the assembled state, the housing parts 7 . 9 on adjacent housing edges 13 . 15 against each other or pushed towards each other. Such adjacent housing edges 13 . 15 exist here in particular on both sides of the diagonal D, in which case only the housing edges facing the viewer 13 . 15 are visible, and wherein the - viewed along the diagonal D - opposite housing edges in the view of 1a) are covered.

The housing parts 7 . 9 are here as - seen in cross-section - L-shaped sheet metal elements formed, in particular as an angle-shaped bent metal shell halves. In this case, an edge length measured in the cross-sectional plane is perpendicular to the first housing edge 13 and the second housing edge 15 standing housing edges 17 . 17 ' smaller than a length of a mounted state on the housing edges 17 . 17 ' adjacent arrangement edge of the arrangement of the exhaust aftertreatment elements 3 in the relaxed state, so that the adjacent housing edges 13 . 15 in the relaxed state have a certain distance from each other. It is possible that this distance is closed in the compressed state. Likewise, it is also possible that the housing parts are dimensioned so that the distance between the adjacent housing edges 13 . 15 Although reduced in the compressed state, but not reduced to zero.

The housing parts 7 . 9 each have their in their mounted state adjacent housing edges 13 . 15 Form-fitting elements 19 . 19 ' on which are arranged to interlock in the assembled state. The positive locking elements 19 . 19 ' have here teeth, which - as in 1a) shown - in the assembled state mesh. In this way, the housing parts 7 . 9 in a simple manner aligned relative to each other and can be prefixed to each other.

The housing parts 7 . 9 have frontal, inwardly directed, preferably inwardly bent or flanged housing flanges 21 on, in particular for pressing in the housing 5 in the outer casing 11 serve.

In addition, the housing parts 7 . 9 one extract element each 23 on, with the extract elements 23 are formed here as eyelets, which in each case in a bending edge of the L-shaped housing parts 7 . 9 attached, in particular welded in the bending edge.

The housing parts 7 . 9 are preferably bent from thin sheet, with a sheet thickness of the housing parts 7 . 9 preferably 1 mm.

Also the outer case 11 is preferably formed from bent sheet metal parts, preferably in the range of welds 25 welded together.

The outer housing 11 has frontally outwardly directed outer flanges 27 on which flange positive locking elements 29 exhibit. The flange form-locking elements 29 each consist of a sequence of juxtaposed projections and recesses flanging to the outer housing 27 are arranged so that adjacent Außengehäuseflansche 27 two juxtaposed, identically formed outer housing 11 positively interlock with their projections and recesses. The projections preferably have fastening holes 31 on, for attachment, such as screwing the outer housing 11 and thus also the entire exhaust gas component 1 serve at a parent exhaust aftertreatment device. For better clarity, here is only one mounting hole with the reference numeral 31 designated.

The outer flanges 27 are preferably by folding the sheets, which are the outer casing 11 form, produced. In this case, initially exemptions remain in the four corners of the front page, which preferably each with a preferably rectangular, in particular square, piece of sheet metal 32 filled in to the outer flanges 27 close in the circumferential direction. The four pieces of sheet metal 32 are preferred with the outer flanges 27 welded and form in the result so a part of the finished outer flanges 27 ,

2 shows the representation of an assembly of the exhaust gas component 1 according to 1 , Identical and functionally identical elements are provided with the same reference numerals, so that reference is made to the preceding description. Here is in particular the case 5 with the exhaust aftertreatment elements 3 in the outer casing 11 used, in particular pressed, where it is under compressive stress in the outer housing 11 is arranged. It is further shown here that on the outside of the outer housing 11 still knitted wire elements 33 can be arranged for the storage of the outer housing 11 serve in a parent exhaust aftertreatment device.

The housing parts 7 . 9 are in the assembled state preferably in the range of extract elements 23 with the outer housing 11 welded, in particular each with a weld of preferably 50 mm in length.

On the outer housing 11 are still slots 35 recognizable, whereby the outer housing 11 especially on each of its four sides such a slot 25 has, in 2 due to the chosen view only two of these slots 35 are recognizable. In these slots, preferably, not shown retaining cross, in particular made of sheet metal, held - preferably non-positively, positively or materially, preferably welded -, wherein in the outer housing 11 arranged holding cross as stabilizing support structure for the outer housing 11 serves.

3 shows a representation of the arrangement of exhaust aftertreatment elements 3 with a plurality of compression mats 37 as preferred in the embodiment according to the 1 and 2 is provided. Identical and functionally identical elements are provided with the same reference numerals, so that reference is made to the preceding description. In the embodiment shown here are between the individual exhaust aftertreatment elements 3 and between each exhaust aftertreatment element 3 and the housing 5 compression mats 37 arranged. These serve on the one hand to seal the arrangement and on the other hand to provide an over the elasticity of the housing parts 7 . 9 Extending compressibility and / or elasticity of the compression unit 10 ,

In particular, in the embodiment illustrated here, a plurality of identical compression mats 37 provided, each of the compression mats at least one slot 39 having, with this slot 39 preferably centrally from an outer edge or mat edge of a compression mat 37 to about the center or center of gravity of the compression mat 37 extends. The slot 39 is so far formed as a middle slot. At least two of the compression mats 37 are with their slots 39 inserted into each other. These are in particular in 3 not shown - because hidden - compression mats, the cross-shaped within the arrangement of the exhaust aftertreatment elements 3 are arranged between them. These compression mats are preferably identically designed but oppositely oriented with respect to their orientation so that they engage with their central slots and thus a cross-shaped arrangement of two mutually perpendicular compression mats 37 can form.

On each outside of the arrangement of exhaust aftertreatment elements 3 is in each case another compression mat 37 arranged so that the arrangement shown here a total of six compression mats 37 namely, two internal, cross-shaped, and four laterally arranged compression mats 37 of which two here face the viewer and thus are visible. The compression mats 37 each preferably except the middle slot 39 two more side recesses 41 in the area of which an outer edge or mat edge of the compression mats 37 something springs back, leaving the recesses 41 in particular as two sides open-edged recesses starting from a lower edge 43 until about the middle of a respective recess 41 receiving side edge 45 extend. The remaining area of the extension of the side edge 45 In this way, it virtually forms a projection 47 - relative to the recess 41 seen. The laterally arranged compression mats 37 are now alternately aligned inversely to each other, so have alternately different orientations, each with the projections 47 in the recesses 41 intervention. In addition, it also shows that the projections 47 the central, cross-shaped compression mats 37 in the middle slots 39 the laterally arranged compression mats 37 intervention. In this way, a stable arrangement composite of compression mats 37 provided, which in a simple manner by laying and inserting the compression mats 37 can happen. It does not require complex wrapping individual exhaust aftertreatment elements 3 ,

4 shows a schematic representation of a device 49 for carrying out a method for producing the exhaust gas component 1 , in particular the exhaust gas component 1 according to the in the 1 to 3 illustrated embodiment. The device 49 has a holding device 51 on, which one - in cross-section one on the holding device 51 arranged compression unit 10 seen - L-shaped bearing surface 53 having. This is in the embodiment of the holding device shown here 51 by two support elements 55 formed so that the bearing surface 53 here ultimately divided into two parts. The support elements 55 are in turn on a support frame 57 held.

The L-shaped support elements 55 and thus at the same time the bearing surface 53 are oriented so that one knee of the L points downwards in a vertical direction.

The device 49 has at least one as a stop element 58 trained stop plate for aligning the housing parts 7 . 9 , the exhaust aftertreatment elements 3 and / or the compression mats 37 on.

The holding device 51 also has at least one, in this case two clamping jaws 59 which are set up to the compression unit 10 to encompass and a compression force in the compression unit 10 initiate. The clamps 59 have here two clamping strap parts, namely in each case a first clamping strap part 61 and a second tension bow part 63 , wherein the tension bow parts 61 . 63 can be braced with each other and so inward, so in particular in an interior, which of the tension bow parts 61 . 63 is encompassed to generate directional compression force.

For the production of the exhaust gas component 1 First, the first tension bow parts 61 on the support surface 53 arranged. Subsequently, the first housing part 7 on the first tension bow parts 61 applied, in particular so that it is on the stop element 58 strikes. Then the compression mats 37 and the exhaust aftertreatment elements 3 to a - seen in cross section - rectangular, preferably square arrangement on the first housing part 7 arranged. Thereafter, the second housing part 9 on this arrangement, the exhaust aftertreatment elements 3 and the compression mats 37 hung up, causing the compression unit 10 will be produced. The positive locking elements serve this purpose 19 the housing parts 7 . 9 to their orientation relative to each other. On the thus formed compression unit 10 now become the second tension bow parts 63 This is done with the first tension bow parts 61 clamped, so the clamp 59 be formed and a compression force on the housing parts 7 . 9 is applied, so the compression unit 10 is compressed.

Subsequently, the compression unit 10 with the clamps 59 from the holding device 51 be removed. The compression unit 10 Then finally a press device, not shown here in the outer housing 11 pressed, preferably a pressing force on the front side, inwardly directed housing flanges 21 is applied. It is possible that the compression unit 10 from the tensioned clamps 59 pressed out and at the same time in the outer housing 11 is pressed. But it is also possible that the clamp 59 when pressing in the compression unit 10 in the outer casing 11 - in particular successively - be resolved.

5 shows a representation of an arrangement of a plurality of exhaust gas components 1 according to the in the 1 to 3 illustrated embodiment in plan view. Identical and functionally identical elements are provided with the same reference numerals, so that reference is made to the preceding description. It shows here that identically formed, adjacent to each other arranged exhaust gas components 1 with the flange positive locking elements 29 the outer housing flanges 27 mesh so that the exhaust components 1 very space-saving and at the same time - because of the outer housing flanges 27 trained recesses - even material-saving, can be arranged. At the same time, the interlocking positive locking elements stabilize 29 the arrangement of the exhaust gas components 1 , These are preferably arranged in an exhaust housing, not shown, of a superordinate exhaust aftertreatment device, in particular attached to or in this. It is particularly possible that the exhaust gas components 1 by means of fixing holes 31 are bolted in the exhaust housing.

In 5 are also because of the frontal view even the middle, cruciform between the exhaust aftertreatment elements 3 arranged compression mats 37 recognizable.

Overall, it shows that with the exhaust gas component 1 , the method for their production and the apparatus for carrying out the method an optimized rectangular, preferably square arrangement of exhaust aftertreatment elements 3 can be provided. This results in space advantages in an entire exhaust aftertreatment plant due to the simple, compact and flexible arrangement rectangular, in particular square exhaust aftertreatment elements 3 that are easily replaceable. In addition, damage to the exhaust aftertreatment elements 3 effectively avoided during assembly.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 2011/0030355 A1 [0002]

Claims (15)

Exhaust gas component ( 1 ), with - a - seen in cross section - rectangular arrangement of at least one - seen in cross section - rectangular exhaust aftertreatment element ( 3 ); - a housing ( 5 ), which surrounds the - seen in cross-section - rectangular arrangement, wherein - the housing ( 5 ) has a rectangular cross section and along a diagonal (D) of the cross section in two housing parts ( 7 , 9), characterized in that - the housing ( 5 ) under compressive stress in an outer casing ( 11 ) is arranged. Exhaust gas component ( 1 ) according to claim 1, characterized in that the housing parts ( 7 . 9 ) on adjacent housing edges ( 13 . 15 ) are urged towards each other under tension. Exhaust gas component ( 1 ) according to one of claims 1 or 2, characterized in that the housing parts ( 7 . 9 ) - as seen in cross section - L-shaped sheet metal elements are formed, wherein preferably a measured in the cross-sectional plane edge length of a housing edge of at least one of the housing parts ( 7 . 9 ) is smaller than a length of an arrangement edge of the arrangement of the at least one exhaust gas aftertreatment element which bears against the housing edge in the mounted state ( 3 ) in a relaxed state. Exhaust gas component ( 1 ) According to one of the preceding claims, characterized in that the housing parts ( 7 . 9 ) in the assembled state adjacent housing edges ( 13 . 15 ) Form-locking elements ( 19 ) which are adapted to interlock in the assembled state. Exhaust gas component ( 1 ) according to one of the preceding claims, characterized in that between at least one exhaust gas aftertreatment element ( 3 ) and the housing ( 5 ) and / or between at least two exhaust aftertreatment elements ( 3 ) at least one compression mat ( 37 ) is arranged. Exhaust gas component ( 1 ) according to one of the preceding claims, characterized in that a plurality of identical compression mats ( 37 ), each compression mat ( 37 ) at least one slot ( 39 ), wherein preferably at least two compression mats ( 37 ) are arranged in one another. Exhaust gas component ( 1 ) According to one of the preceding claims, characterized in that the housing parts ( 7 . 9 ) front-side, inwardly directed housing flanges ( 21 ) exhibit. Exhaust gas component ( 1 ) according to one of the preceding claims, characterized in that the outer housing ( 11 ) outer-face-directed outer housing flanges ( 27 ), the flange positive locking elements ( 29 ) exhibit. Method for producing an exhaust gas component ( 1 ), in particular an exhaust gas component ( 1 ) according to one of claims 1 to 8, comprising the following steps: - providing a - seen in cross section - L-shaped, first housing part ( 7 ); Arranging at least one rectangular exhaust gas after-treatment element (seen in cross-section) 3 ) on the first housing part ( 7 ) to a - seen in cross section - rectangular arrangement; - placing a - viewed in cross-section - L-shaped second housing part ( 9 ) on the assembly, whereby a compression unit ( 10 ) will be produced; - Applying a compression force on the housing parts ( 7 , 9), so that the compression unit ( 10 ), and - compressing the compression unit ( 10 ) in an outer housing ( 11 ) under compressive stress. Method according to claim 9, characterized in that at least one compression mat ( 37 ) between at least two exhaust aftertreatment elements ( 3 ) and / or between at least one exhaust gas aftertreatment element ( 3 ) and the housing ( 5 ) is arranged. Method according to one of claims 9 and 10, characterized in that the first housing part ( 7 ) on a - seen in cross section - L-shaped bearing surface ( 53 ) a holding device ( 51 ) is arranged. Method according to one of claims 9 to 11, characterized in that a compression force on the housing parts ( 7 . 9 ) by means of the compression unit ( 10 ) tensioned clamping bracket ( 59 ) is applied. Method according to one of claims 9 to 12, characterized in that the pressing of the compression unit ( 10 ) in the outer housing ( 11 ) by applying a pressing force on front side, inwardly directed housing flanges ( 21 ) of the housing parts ( 7 . 9 ) is carried out. Contraption ( 49 ) for carrying out a method according to one of claims 9 to 13, comprising - a holding device ( 51 ), which - seen in cross section - L-shaped bearing surface ( 53 ), and with - at least one clamping bracket ( 59 ) for applying a compressive force to a compression unit ( 10 ) of an exhaust gas component to be produced ( 1 ). Contraption ( 49 ) according to claim 14, characterized in that the at least one clamping bracket ( 59 ) with a first tensioning bow part ( 61 ) on the support surface ( 53 ) can be arranged, or that the support surface ( 53 ) at least one recess for the arrangement of the first clamping strap part ( 61 ) having.

Images