DE102016114283A1 - exhaust aftertreatment arrangement - Google Patents

Abstract

The present invention relates to an exhaust aftertreatment device (1) on an internal combustion engine, comprising two arranged in the exhaust gas flow direction sequentially exhaust aftertreatment components, wherein the longitudinal axes of the exhaust aftertreatment components arranged at an angle of 30 to 150 degrees to each other, wherein between an outer circumferential surface of the first exhaust aftertreatment component and a housing of Exhaust after-treatment arrangement, a flow channel is formed and the exhaust gas is deflected after flowing through the first exhaust aftertreatment component, wherein at least partially the exhaust gas is passed through the flow channel before it flows into the second exhaust aftertreatment component, which is characterized in that in the region of the flow channel, an injector for injecting a Reductant is provided in the flow channel, wherein the second exhaust aftertreatment component is an SCR catalyst.

Description

The present invention relates to an exhaust aftertreatment arrangement on an internal combustion engine according to the features in the preamble of claim 1.

In motor vehicles, internal combustion engines are used to convert the chemical energy contained in the fuel through the combustion process into mechanical energy for driving the motor vehicle. Due to the ideal Carnot process, about 40% of the energy contained in the fuel is converted into kinetic energy, the remaining energy contained in the fuel is converted into heat and exhaust gases are produced during the combustion process.

Among other things, these exhaust gases contain nitrogen oxides (NO, NO2). Selective catalytic reduction (SCR) has been established in recent years, especially in the automotive industry, in which a reducing agent is added to the exhaust gas and thereby selectively reduced nitrogen oxides and undesirable side reactions such as oxidation of sulfur dioxide to sulfur trioxide are suppressed.

The reducing agent used is ammonia. In the automotive industry, this is provided as an aqueous urea solution and is known, inter alia, under the registered trademark AdBlue. In particular, it is the goal of reducing the nitrogen oxide emission in diesel engines by means of selective catalytic reduction, which is also known as urea injection.

The reducing agent added to the exhaust gas flow must be mixed with the exhaust gases. The reducing agent itself is often injected with an injector into the exhaust stream or injected. After the mixing of the exhaust gas flow with the reducing agent, this then enters a downstream in the flow direction SCR catalyst.

The point of injection of the exhaust gas stream with the reducing agent is usually preceded by an oxidation catalyst.

In order to meet future NOx emissions legislation, the highest possible effectiveness with respect to NOx conversion is sought. Due to the close to the engine usually very tight space conditions as compact as possible constructions of the exhaust aftertreatment route are required.

For example, from the DE 10 2015 107 083 A1 an exhaust aftertreatment arrangement is known in which two exhaust aftertreatment components are arranged in a compact manner taking into account the space to each other.

The object of the present invention is to provide an exhaust aftertreatment arrangement which offers compact space dimensions, but at the same time the possibility of selective catalytic reduction with optimum efficiency.

The object is achieved with the features in claim 1.

Advantageous embodiments of the present invention are described in the dependent claims.

The exhaust aftertreatment arrangement is provided for an internal combustion engine of a motor vehicle and has at least two exhaust gas aftertreatment components sequentially arranged in the exhaust gas flow direction. The longitudinal axes of these two exhaust aftertreatment components are arranged at an angle of 30 ° to 150 °, preferably 70 ° to 110 ° to each other. Advantageously, the second exhaust aftertreatment component is partially covered or overlapped by the first exhaust aftertreatment component. Preferably, at least 35%, in particular more than 50% of the cross-sectional area of the second exhaust aftertreatment component is covered by a projection along the longitudinal direction of the second exhaust aftertreatment component of the first exhaust aftertreatment component. This allows a particularly compact arrangement of the two exhaust aftertreatment components to each other.

It is further provided that between a outer circumferential surface of the first exhaust aftertreatment component and a housing of the exhaust aftertreatment device, a flow channel is formed and the exhaust gas is deflected after flowing through the first exhaust aftertreatment component. The deflection takes place in particular by about 180 °. In this case, the exhaust gas is preferably at least partially performed more than 80%, in particular more than 90% of the exhaust gas through the flow channel. It thus flows around the outer circumferential surface of the first exhaust aftertreatment component before it flows into the second exhaust aftertreatment component.

According to the invention, an injector for injecting a reducing agent into the flow channel is arranged in the region of the flow channel formed between the outer circumferential surface of the first exhaust aftertreatment component and the housing of the exhaust gas aftertreatment device. The second Exhaust after-treatment component according to the invention is an SCR catalyst. The SCR catalyst may also be referred to as an SCR filter.

The inventive arrangement of the exhaust aftertreatment components to each other, it is thus possible to allow a compact space dimension. The entire exhaust aftertreatment arrangement can thus be arranged as close to the engine as possible on the internal combustion engine. The operating temperatures of the SCR catalyst are reached faster due to the waste heat of the internal combustion engine, whereby its efficiency is increased.

The inventive design of the flow channel to the outer circumferential surface of the first exhaust aftertreatment component and the previous deflection of the exhaust gas flow, it is still possible despite the compact installation space to achieve a homogeneous and thorough mixing of injected reducing agent and flowing exhaust gas. In particular, a sufficiently long mixing section is provided through the flow channel, without the exhaust aftertreatment components being far apart from one another. This is realized in that a mixing section is already formed in the flow channel around the outer circumferential surface of the first exhaust aftertreatment component.

The first exhaust aftertreatment component is designed as an oxidation filter. In particular, the internal combustion engine is a self-igniting internal combustion engine, preferably a diesel engine. The oxidation filter is designed in this case as a diesel oxidation filter, preferably as a metal-wound catalyst.

The flow channel which at least partially surrounds the outer lateral surface, in particular the cylindrical outer lateral surface of the first exhaust gas aftertreatment component, is in particular designed to encompass this area. A large part, in particular more than 50%, of the outer lateral surface of the first exhaust gas after-treatment component is spaced apart from an inner lateral surface of the housing, so that the planar flow channel is formed therebetween. Following in the exhaust gas flow direction, a part of the outer circumferential surface of the first exhaust aftertreatment component is not formed directly spaced from the housing. This part of the outer circumferential surface is oriented in the direction of the second exhaust aftertreatment component. Preferably, more than 60%, in particular more than 70%, of the outer lateral surface of the first exhaust gas after-treatment component form one side of the planar flow channel.

The partial flow of the exhaust gas flowing through the flow channel has a turbulent flow, in particular due to the previously performed deflection after passing through the first exhaust aftertreatment component. This turbulence of the flow improves the mixing with the injected reducing agent. Preferably, the entire exhaust gas flow is passed through the flow channel.

The injector is arranged in particular on the second exhaust gas aftertreatment component opposite side of the first exhaust aftertreatment component. The injected injection medium thus still lays the furthest possible way through the flow channel. The mixing section of exhaust and reducing agent is thus utilized to the maximum.

Furthermore, particularly preferably, a swirl element and / or impact element is arranged in the flow channel. The swirl element can either be designed such that an additional swirling motion or turbulence is generated in the flowing exhaust gas. The swirl element can also be configured such that the injected reducing agent is mixed with swirl or turbulence. It can also be arranged a separate impact element or the swirl element can be combined with the baffle element.

In the baffle element, the injected reducing agent initially bounces. This results in even smaller drops and thus better mixing with the flowing exhaust gas. Thus, there is a drop break on a baffle element.

Furthermore, particularly preferably, the injector is arranged at such an angle on the housing of the exhaust gas aftertreatment arrangement, that the injected injection medium is injected into the flow channel in a tangential direction to the outer lateral surface of the first exhaust gas aftertreatment component. The injection medium is preferably injected into the flow channel with the exhaust gas flow direction.

An alternative embodiment variant provides that the injection agent is injected counter to the exhaust gas flow direction. Alternatively or additionally, the injection agent can also be sprayed onto the outer lateral surface of the first exhaust gas aftertreatment component, in particular substantially at right angles, so that it rebounds therefrom and, in this case too, dripping occurs.

Again alternatively or additionally, a deflection element is provided in the flow channel. The injected reducing agent can thus partially in an opposite tangential direction be redirected. This results in the advantage that the first exhaust aftertreatment component flows around both sides of its outer circumferential surface not only from the flowing exhaust gas, but also from the injected reducing agent.

Furthermore, according to the invention it is provided that the flow channel merges into a transfer channel. The transfer passage connects the first exhaust aftertreatment component and the second exhaust aftertreatment component to one another in a fluid-conducting manner.

In the transfer channel, a swirl element and / or a baffle element is furthermore preferably arranged. As a result, the flowing exhaust gas, which has already been mixed with reducing agent, can again be mixed into a swirling motion for better mixing. Furthermore, an additional baffle element can be provided, so that even larger droplets of the reductant flowing in the exhaust gas undergo another droplet break-up and a better thorough mixing with the exhaust gas is provided.

Preferably, the swirl element and / or impact element is coupled in the transfer passage with the outer circumferential surface of the first exhaust aftertreatment component. With regard to the flow direction and the transfer channel, it is thus possible that the swirl element and / or impact element, except for the coupling side to the first exhaust aftertreatment component, is otherwise freely suspended in the transfer channel.

Furthermore, particularly preferably, the swirl element is designed as a guide element or swirl blade. The guide element, or guide vane, is designed in such a way that the flow path of exhaust gas and reducing agent is further extended before it enters the SCR catalytic converter. A longer period for mixing of flowing exhaust gas and reducing agent is thus given, and an additional twist, or rotation, is generated, which is why the mixing is improved.

It is further particularly preferred that the two longitudinal axes of the exhaust aftertreatment components are arranged at an angle of 80 ° to 100 °, in particular from 85 ° to 95 ° and preferably substantially perpendicular to each other. Furthermore, particularly preferably, a cross-sectional area of the second exhaust gas treatment components is more than 60%, in particular more than 70%, preferably more than 80%, particularly preferably more than 90% and very particularly preferably completely covered by a projection of the first exhaust aftertreatment component onto this cross-sectional area.

Further advantages, features, characteristics and aspects of the present invention are the subject of the following description. Preferred embodiments are shown in the schematic figures. These are for easy understanding of the invention. Show it:

1 an exhaust aftertreatment arrangement according to the invention,

2 a longitudinal section through the exhaust gas aftertreatment device according to the invention,

3 a partial section through the exhaust aftertreatment device,

4 the exhaust aftertreatment arrangement according to 1 in another perspective view,

5 and 6 Flow patterns through the exhaust aftertreatment arrangement according to the invention,

7 and 8th a preferred embodiment variant of the inventive exhaust gas after treatment arrangement in a partial sectional view and exploded view,

9 and 10 Sectional views according to the section lines of 4 .

11 various possible positions of the injector with respect to the longitudinal axis of the first exhaust aftertreatment component and

12 a sectional view along section line BB 4 ,

In the figures, the same reference numerals are used for the same or similar components, even if a repeated description is omitted for reasons of simplicity.

1 shows an exhaust aftertreatment arrangement according to the invention 1 , This has an outer housing 2 on. In the case 2 arranged is a first exhaust aftertreatment component 3 and a second exhaust aftertreatment component 4 , According to the invention is an injector 5 provided, the injector 5 a in 1 not further illustrated reducing agent injected or injected, which mixes with the flowing exhaust gas A.

2 shows the exhaust aftertreatment arrangement 1 in a longitudinal sectional view and 3 in a perspective sectional view. The exhaust gas A flows over an inlet region 6 in the first exhaust aftertreatment component 3 one. The entrance area 6 widens in a funnel shape. The first exhaust aftertreatment component 3 is for example, an oxidation filter. The first exhaust aftertreatment component 3 has a this enclosing housing 7 on. The housing 7 has an outer circumferential surface 8th , The exhaust gas flows through the first exhaust aftertreatment component 3 , At the entrance area 6 opposite side S of the first exhaust aftertreatment component 3 is a baffle 9 arranged. The baffle 9 produces a substantially 180 ° deflection of the flowing exhaust gas A. In particular, an upwardly directed portion of the exhaust gas A, which is shown on the image plane, as well as lateral, flowing exhaust gases, do not overflow the outer circumferential surface 8th the first exhaust aftertreatment component 3 ,

Between the outer housing 2 the exhaust aftertreatment device 1 and the outer circumferential surface 8th the first exhaust aftertreatment component 3 this is a flow channel 10 educated. The deflected upwards or at the sides partial flow of the exhaust gas A flows through this flow channel 10 , Further, the injector 5 arranged such that a in 3 indicated injected reducing agent 11 also in the flow channel 10 flows and thereby with the flow channel 10 flowing partial flow of the exhaust gas A mixed.

Preference is furthermore given according to 4 represented the housing 2 the exhaust aftertreatment device 1 in the area of the first exhaust aftertreatment component 3 bivalve thus formed as a shell component. An injection channel 12 is arched outwards and faces the housing 2 optional with a supernatant 19 (see. 10 ) above. The injected stream of reducing agent 11 is then through the injection channel 12 , in particular with a twist, out. The injection channel 12 is preferably directly fluid-conducting or open with the flow channel 10 connected.

Also shown is the arrangement according to which the longitudinal axis L3 is arranged at an angle α to the longitudinal axis L4 of the second exhaust gas aftertreatment component 4 , Preferably, the angle α between 30 ° and 150 ° is formed, very particularly preferably this is substantially 90 °. A cross-sectional area Q of the second exhaust aftertreatment component 4 is thus particularly preferably at least 50% of a projection P of the first exhaust aftertreatment component 3 covered. More than 60%, in particular more than 70%, particularly preferably more than 80%, of the cross-sectional area Q of the second exhaust-gas aftertreatment component are preferred 4 from the projection P of the first exhaust aftertreatment component 3 covered. The projection P takes place in the direction of the longitudinal axis L4.

The flow channel 10 then goes into a transfer channel 13 about, which at the same time the entry into the second exhaust aftertreatment component 4 forms. The transfer channel 13 can also be referred to as a mixing channel. Here again finds a thorough mixing of injected reducing agent 11 and flowing exhaust gas A instead. The second exhaust aftertreatment component 4 is preferably an SCR catalyst. After flowing through the second exhaust aftertreatment component 4 then the exhaust gas A via a piece of pipe 14 transferred to another exhaust line, not shown. For example, a diesel particulate filter or other other exhaust aftertreatment components may follow.

5 and 6 show a flow pattern of the flowing exhaust gas A and the injected reducing agent 11 , Good to see is that the exhaust gas A relative to the image plane on the left side of 5 is deflected on all sides at an indicated deflecting plate by about 180 °, so that it at least with a partial flow over the outer circumferential surface 8th the first exhaust aftertreatment component 3 to be led. Further, the reducing agent becomes 11 injected. In the area of the transfer channel 13 then occurs a mixing of reducing agent 11 and flowing exhaust gas A. In the flow channel 10 already done a thorough mixing. This can then in the second exhaust aftertreatment component 4 enter in an approximately homogeneously mixed flow. By the execution of the flow channel 10 an exhaust vortex forms, which has a positive effect on the mixing with the reducing agent.

7 and 8th show a preferred embodiment variant of the exhaust aftertreatment arrangement according to the invention 1 in partial section or exploded view. Here is the injector 5 in the flow direction of the injected reducing agent 11 downstream of a baffle element 15 arranged. Against this baffle element 15 bounces the injected reducing agent 11 and there is a drop break, so that an even better mixing with the not shown flowing exhaust gas takes place. The impact element 15 can also be designed as a combined swirl element, so that an additional rotation of the flow of the injected reducing agent 11 is produced. Also here can be a flow deflection of the injected reducing agent 11 be made such that a first partial flow to the image plane of 7 based on the right side over the outer circumferential surface 8th the first exhaust aftertreatment component 3 flows and a second partial stream of the injected reducing agent 11 on the left side over the outer lateral surface 8th flows.

Further shown downstream in the exhaust gas flow direction is a swirl element in the form of a guide element 18 educated. The guiding element 18 puts the guide element 18 passing, with reducing agent 11 enriched exhaust gas flow in a swirling motion and thus once again extends the mixing section, so that before entering the second exhaust aftertreatment component 4 a more homogeneous mixing of exhaust gas A and reducing agent 11 he follows. This guiding element 18 is on the outer circumferential surface 8th the first exhaust aftertreatment component 3 coupled. It lies or hangs in the transfer channel 13 , The guiding element 18 may alternatively or additionally also in the housing 2 or at the second exhaust aftertreatment component ( 4 ).

9 shows a schematic sectional view according to CC through the exhaust aftertreatment device according to the invention 1 , Good to see is that more than 50% of the outer surface area 8th the first exhaust aftertreatment component 3 be overflowed by the exhaust gas A, thus more than 50% of the outer circumferential surface 8th the flow channel 10 between outer lateral surface 8th and housing 2 form. A lower part of the outer surface area related to the image plane 8th is not directly spaced from the housing 7 , The injector 5 is arranged such that the injected reducing agent 11 in the tangential direction of the outer circumferential surface 8th in the flow channel 10 is injected. The exhaust gas A flows around the outer circumferential surface 8th both sides. Optionally, a deflecting element 21 be provided, which is the reducing agent 11 at least partially deflected, so that the outer circumferential surface 8th from both sides also of the reducing agent 11 is flowed around.

10 shows a cross-sectional view along section line BB 4 , Accordingly, the flow channel 10 between an outer circumferential surface 8th the first exhaust aftertreatment component 3 and the housing 2 or an inner circumferential surface 16 of the housing 2 educated. Further, the supernatant 19 through an outward bulge or curvature 17 educated. Through this vault 17 is an injection channel 12 formed, in which the reducing agent is injected. The injection channel 12 is direct and open with the flow channel 10 connected.

According to 9 and 10 is again evident that the flow channel 10 flat between the outer circumferential surface 8th the first exhaust aftertreatment component 3 and the inner circumferential surface 16 of the housing 2 a large part of the first exhaust aftertreatment component 3 is formed encompassing.

11 further shows a schematic plan view of the relative position of the injector 5 and first exhaust aftertreatment component 3 to each other. The exhaust gas A flows through the first exhaust aftertreatment component 3 and will end 20 through the baffle 9 deflected and into the flow channel 10 transferred. To do this, then spray the injector 5 the reducing agent 11 in the flow channel 10 one. The injector 5 do this, as in 9 shown, tangential to the outer circumferential surface 8th the first exhaust aftertreatment component 3 one. The location of the injector 5 relative to the longitudinal axis L3 of the first exhaust aftertreatment component 3 can be shown centrally in a preferred embodiment variant arranged so that the reducing agent 11 is injected orthogonal to the longitudinal axis L3. However, it is also possible to refer to the image plane on the left and right, respectively, positions for the injector 5 be selected so that is injected at an angle β of up to 30 °. The reductant is shown on the left on the image plane 11 at an angle β preferably from 30 ° to 90 °, in particular at 30 °, injected in such a way that it is injected with the flow direction of the exhaust gas A substantially. At the injector 5 , On the image plane with respect to the right side, the reducing agent is also injected at an angle β between 30 ° and 90 °, preferably at 30 ° to the longitudinal axis L3, such that it is substantially opposite to the flow direction of the exhaust gas A and Flow of the exhaust gas A is injected intersecting. However, an angular position of the injector of 80 ° to 100 ° to the longitudinal axis L3 is preferably provided. Allen angular positions, represented in the 11 However, common is a tangential injection, as in 9 is shown based on the outer circumferential surface 8th , The injector is preferred 5 arranged at an angle of 30 ° to 50 ° to the longitudinal axis L3.

12 shows a sectional view along section line BB 4 , Evident is the exhaust gas A, which from the first exhaust aftertreatment component 3 exits and is deflected, leaving it in the flow channel 10 between outer lateral surface 8th the exhaust aftertreatment component 3 and the housing 2 entry. The flow channel 10 expands radially in the radial direction 23 on. The exhaust gas A forms a first exhaust vortex due to the radial expansion 24 out as well as a second exhaust vortex 25 , Not shown in detail is now in the field of this exhaust vortex, significantly the first exhaust vortex 24 , a reducing agent 11 in the flow channel 10 injected. Due to the exhaust vortex 24 . 25 comes to a better mixing of the exhaust gas A with the reducing agent 11 ,

LIST OF REFERENCE NUMBERS

1

exhaust aftertreatment arrangement

2

casing

3

first exhaust aftertreatment component

4

second exhaust aftertreatment component

5

injector

6

entry area

7

Housing too 3

8th

Outer jacket surface too 7

9

baffle

10

 flow channel

11

 reducing agent

12

 Injection channel

13

 Transfer channel

14

 pipe section

15

 baffle

16

Inner jacket surface too 2

17

 bulge

18

 vane

19

 Got over

20

End to 3

21

 deflecting

22

 axially

23

 radial direction

24

 first exhaust vortex

25

 second exhaust vortex

A

exhaust

L3

Longitudinal axis too 3

L4

Longitudinal axis too 4

P

projection

S

page

Q

Cross sectional area

α

 angle

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

• DE 102015107083 A1 [0008]

Claims (13)

Exhaust after-treatment arrangement ( 1 ) on an internal combustion engine, having two exhaust gas aftertreatment components sequentially arranged in the exhaust gas flow direction ( 3 . 4 ), wherein the longitudinal axes (L3, L4) of both exhaust aftertreatment components ( 3 . 4 ) at an angle (α) of 30 to 150 degrees to each other, wherein between an outer circumferential surface ( 8th ) of the first exhaust aftertreatment component ( 3 ) and a housing ( 2 ) of the exhaust aftertreatment arrangement ( 1 ) a flow channel ( 10 ) and the exhaust gas (A) after flowing through the first exhaust aftertreatment component (A) 3 ) is deflected, wherein at least partially the exhaust gas (A) through the flow channel ( 10 ) before it enters the second exhaust aftertreatment component ( 4 ) flows in, characterized in that in the region of the flow channel ( 10 ) an injector ( 5 ) for injecting a reducing agent ( 11 ) in the flow channel ( 10 ), wherein the second exhaust aftertreatment component ( 4 ) is an SCR catalyst. Exhaust after-treatment arrangement according to claim 1, characterized in that the first exhaust aftertreatment component ( 3 ) is an oxidation filter, in particular diesel oxidation filter, and / or that the deflected exhaust gas (A) at least more than 80%, preferably more than 90% and in particular completely through the flow channel ( 10 ) is guided. Exhaust after-treatment arrangement according to claim 1 or 2, characterized in that the flow channel ( 10 ) the outer circumferential surface ( 8th ) of the first exhaust aftertreatment component ( 3 ) is formed encompassing area, preferably, the housing ( 2 ) in the region of the flow channel ( 10 ) an outward curvature ( 17 ), so that an injection channel is formed. Exhaust gas after-treatment arrangement according to one of claims 1 to 3, characterized in that the injector ( 5 ) on the second exhaust aftertreatment Kopmonente ( 4 ) opposite side of the first exhaust aftertreatment component ( 3 ) is arranged. Exhaust after-treatment arrangement according to one of claims 1 to 4, characterized in that in the flow channel ( 10 ) a swirl element and / or a baffle element ( 15 ) is arranged. Exhaust after-treatment arrangement according to one of claims 1 to 5, characterized in that the injector ( 5 ) at such an angle to the housing ( 2 ) is arranged, that the injected reducing agent ( 11 ) in a tangential direction to the outer surface ( 8th ) of the first exhaust aftertreatment component ( 3 ) in the flow channel ( 10 ) and / or injection channel ( 12 ) is injected and / or that the injector ( 5 ) at an angle (β) of 30 ° to 150 ° to the longitudinal axis (L3) of the first exhaust aftertreatment component ( 3 ) is arranged. Exhaust after-treatment arrangement according to one of claims 1 to 6, characterized in that a deflecting element in the flow channel ( 10 ), which contains the injected reducing agent ( 11 ) partially deflects in an opposite tangential direction, so that the first exhaust aftertreatment component ( 3 ) on both sides of the reducing agent ( 11 ) is flowed around and / or that a baffle ( 9 ) at one end ( 20 ) of the first exhaust aftertreatment component ( 3 ) is arranged, so that the exhaust gas (A) is deflected and at least partially through the flow channel ( 10 ) to be led. Exhaust after-treatment arrangement according to one of claims 1 to 7, characterized in that the flow channel ( 10 ) into a transfer channel ( 13 ), whereby the transfer channel ( 13 ) the first exhaust aftertreatment component ( 3 ) and the second exhaust aftertreatment component ( 4 ) fluidly connected together. Exhaust-gas aftertreatment arrangement according to one of claims 1 to 8, characterized in that (in the transfer passage 13 ) a guiding element ( 18 ) is arranged. Exhaust after-treatment arrangement according to claim 9, characterized in that the guide element ( 18 ) on the outer circumferential surface ( 8th ) of the first exhaust aftertreatment component ( 3 ), on the housing ( 2 ) and / or the second exhaust aftertreatment component ( 4 ) is coupled. Exhaust after-treatment arrangement according to claim 10, characterized in that the guide element ( 18 ) the flow path of exhaust gas (A) and reducing agent ( 11 ) before entering the second exhaust aftertreatment component ( 4 ) extended. Exhaust after-treatment arrangement according to one of claims 1 to 11, characterized in that the two longitudinal axes (L3, L4) at an angle (α) of 30 to 150 degrees, in particular from 70 to 110 degrees, particularly preferably 85 to 95 degrees and preferably substantially are arranged perpendicular to each other. Exhaust gas after-treatment arrangement according to one of claims 1 to 12, characterized in that at least 35%, preferably more than 50% the cross-sectional area (Q) of the second exhaust aftertreatment component (Q) 4 ) of the first exhaust aftertreatment component ( 3 ) are covered.

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