EP2199559B1 - X-tube and accompanying exhaust gas assembly - Google Patents

X-tube and accompanying exhaust gas assembly Download PDF

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Publication number
EP2199559B1
EP2199559B1 EP09175662.7A EP09175662A EP2199559B1 EP 2199559 B1 EP2199559 B1 EP 2199559B1 EP 09175662 A EP09175662 A EP 09175662A EP 2199559 B1 EP2199559 B1 EP 2199559B1
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EP
European Patent Office
Prior art keywords
pipe according
channels
half shells
inlet
housing
Prior art date
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EP09175662.7A
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German (de)
French (fr)
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EP2199559A1 (en
Inventor
Markus Tüch
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Eberspaecher Exhaust Technology GmbH and Co KG
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Eberspaecher Exhaust Technology GmbH and Co KG
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Publication of EP2199559A1 publication Critical patent/EP2199559A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1872—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
    • F01N13/1877—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal the channels or tubes thereof being made integrally with the housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/06—Tubes being formed by assembly of stamped or otherwise deformed sheet-metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/14—Plurality of outlet tubes, e.g. in parallel or with different length
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/16—Plurality of inlet tubes, e.g. discharging into different chambers

Definitions

  • the present invention relates to an X-tube for an at least partially double-flow exhaust system of an internal combustion engine, in particular of a motor vehicle.
  • the invention also relates to an exhaust system for an internal combustion engine, in particular a motor vehicle, which is equipped with such an X-tube.
  • X-tubes which can also be referred to as X-pants, are used in exhaust systems, which are designed at least partially double-flow, to couple the two parallel-flow exhaust pipes of the double-flow section with each other. This coupling should allow a pressure equalization and in particular a sound pressure equalization between the two exhaust pipes, so that an exchange of airborne sound between the two exhaust pipes takes place.
  • such an X-tube such as in the DE 103 54 699 1, a housing, which has two inlet openings for two coming sections of the two exhaust pipes on one inlet side and two outlet openings for two outgoing sections of the two exhaust pipes on one outlet side.
  • a space enclosed by the housing interior, with which the openings are communicatively connected then takes place the desired pressure equalization or the desired sound transmission.
  • the present invention is concerned with the problem of providing an improved embodiment for an X-tube or for an exhaust system equipped therewith, which is characterized in particular by the fact that the X-tube has a comparatively low flow resistance and is inexpensive to manufacture.
  • the invention is based on the general idea to produce the housing from two half-shells and to arrange in the interior a permeable to airborne sound, which divides the interior into two parallel-flow channels. Through the bottom, the two separate flow-through channels can communicate with each other in terms of pressure transmission as well as airborne transmission. In principle, a gas exchange is possible.
  • the channeling of the interior with the help of the floor reduces the flow resistance of the X-pipe.
  • the fact that for the realization of the X-tube presented here basically only three components are required, namely the two half-shells and the bottom, is particularly advantageous. This makes the production of the X-tube extremely cheap.
  • the half-shells between the channels each have a receiving groove into which the bottom is inserted with its longitudinal ends. As a result, a positive fixing or positioning of the bottom is realized in the half-shells.
  • the half-shells between the channels each have two inwardly projecting, parallel to each other extending longitudinal beads, which form the respective receiving groove in the interior between them.
  • the grooves can be formed particularly inexpensive.
  • the beads lead to a stiffening of the half shells in the area of the soil.
  • the base may have, on a side facing one of the channels, a collar which extends peripherally and protrudes toward the said channel.
  • the two half-shells can be designed as identical parts. This means that both shells are identical. This design means that ultimately only two different components must be used to produce the X-tube, namely the two same half shells and the one bottom. The production costs can be further reduced.
  • Fig. 1 to 8 includes an X-tube 1, which accordingly Fig. 8 can be used in an at least partially double-flow exhaust system 2, a housing 3, which is assembled from two half-shells 4, 5.
  • the two half-shells 4, 5 can be configured in accordance with an advantageous embodiment as equal parts. Both half-shells 4, 5 are then identical.
  • the housing 3 has two inlet openings, namely a first inlet opening 7 and a second inlet opening 8, on an inlet side 6.
  • the housing 3 has two outlet openings, namely a first outlet opening 10 and a second outlet opening 11.
  • the housing 3 encloses an inner space 12, which communicates with the openings 7, 8, 10, 11 communicating.
  • a bottom 13 is arranged. This forms with respect to the two half-shells 4, 5 a separate component. He subdivides the interior 12 into two channels, namely a first channel 14 and a second channel 15. The division of the interior 12 into the two channels 14, 15 takes place in such a way that each channel 14, 15 with an inlet opening 7, 8 and an outlet opening 10, 11 is communicatively connected.
  • the first channel 14 is communicatively connected to the first inlet port 7 and to the first outlet port 10, while the first channel 14 communicates with the first channel second channel 15 is communicatively connected to the second inlet opening 8 and to the second outlet opening 11.
  • the bottom 13 is made permeable to airborne sound. It connects the two channels 14, 15 with respect to an airborne sound transmission.
  • the bottom 13 includes a passage opening 16 through which the two channels 14, 15 are communicatively connected to each other.
  • the passage opening 16 is purely exemplary here. Although it forms a preferred embodiment, but may in principle be formed by a perforation. Likewise, gill-shaped openings are conceivable, which are open or closed against the flow direction and, for example, reduce flow noise.
  • the bottom 13 can be provided with an aerodynamically optimized slot with regard to flow noise and resistance.
  • the two half-shells 4, 5 have according to the preferred embodiment shown here between the channels 14, 15 each have a receiving groove 17.
  • the two grooves 17 are located in the interior 12 opposite and together form a receptacle into which the bottom 13 is inserted with its longitudinal ends 18.
  • the half-shells 4, 5 each have on their outer sides two inwardly projecting, mutually parallel longitudinal corrugations 19.
  • the two longitudinal beads 19 are spaced apart from each other, so that they form the respective receiving groove 17 between them.
  • the longitudinal corrugations 19 form an intensive stiffening of the respective half-shell 4, 5 in the region of the bottom 13.
  • the bottom 13 is fixed in position in the housing 3. This fixation can be realized by a tension with the half shells 4, 5. The fixation then takes place exclusively by adhesion or frictional engagement.
  • a welded joint or a solder joint of the bottom 13 with at least one of the half-shells 4, 5 may be provided to fix the bottom 13 in the housing 3 with respect to its position or position.
  • the tension of the bottom 13 when connecting the two half-shells 4, 5 are realized together.
  • the two half shells 4, 5 are welded together along outwardly projecting flange webs 20.
  • the bottom 13 can also be welded from the outside through the respective half-shell 4, 5 through to the respective half-shell 4, 5.
  • the bottom 13 is designed so that it extends in one plane.
  • the plane of the bottom 13 extends parallel to the two channels 14, 15.
  • the two channels 14, 15 extend in each case parallel to each other and each parallel to a prevailing in the respective channel 14, 15 main flow direction 21, the Fig. 2 indicated by arrows.
  • the plane of the bottom 13 extends perpendicular to a parting plane in which the two half-shells 4, 5 are fastened to each other.
  • This parting plane can in particular form a plane of symmetry for the two half-shells 4, 5.
  • the parting plane of the half-shells 4, 5 can also form a plane of symmetry for the bottom 13, if it is mirror-symmetrical in shape according to the embodiment shown here with respect to this parting plane.
  • the flow paths within the X-tube 1 have an X-shaped contour, which leads to the term "X-tube” or "X-pants".
  • the bottom 13 can according to the preferred embodiment shown here on one side, the one of the channels 14, 15, here the first Channel 14 faces, having a collar 22 which is configured peripherally completely circumferential. Furthermore, the collar 22 to said channel 14, 15, so here to the first channel 14 out of the rest of the bottom 13 and 13 from the plane of the bottom. According to the Fig. 2 . 7 and 8th the collar 22 is flattened on the inlet side and the outlet side in the preferred embodiment presented here. This means that the height of the collar 22, with which the collar 22 protrudes from the rest of the bottom 13 or from the plane of the bottom 13, on the inlet side and outlet side is smaller than in a central portion.
  • the collar height from the central portion to an inlet end 23 of the bottom 13 as well as to an outlet end 24 of the bottom 13 decreases unrestrained and in particular steadily.
  • This height decrease takes place starting from both longitudinal ends 18 of the bottom 13 and - as mentioned above - preferably mirror-symmetrical to the parting plane of the half-shells 4, 5.
  • the bottom 13 has an oval plan, which comprises a rectangular central portion 25 and two semicircular end portions 26.
  • the flats of the collar 22 are preferably formed exclusively in the end portions 26.
  • the single passage opening 16 is formed congruent to the bottom 13 and accordingly also has an oval opening cross-section.
  • the housing 3 includes two inlet portions, namely, a first inlet portion 27 that includes the first inlet port 7 and communicates with the first channel 14, and a second inlet portion 28 that includes the second inlet port and communicates with the second channel 15. Furthermore, the housing 3 has two outlet sections, namely a first outlet section 29, which comprises the first outlet opening 10 and communicates with the first channel 14, and a second outlet portion 30 which includes the second outlet port 11 and communicates with the second channel 15 communicatively.
  • the inlet sections 27, 28 and the outlet sections 29, 30 are each formed in half on the half-shells 4, 5. Likewise, the half shells 4, 5 each form only half of the openings 7, 8, 10, 11, which are completed only when assembled housing 3 to complete openings 7, 8, 10, 11.
  • the half-shells 4, 5 each have on the inlet side 6 and on the outlet side 9 a connecting web 31 and 32, respectively.
  • four such connecting webs are provided, namely two inlet-side connecting webs 31 and two outlet-side connecting webs 32.
  • the connecting webs 31, 32 are located In each case two connecting webs 31, 32, namely the two inlet-side connecting webs 31 and the two outlet-side connecting webs 32 lie flat against each other, in the parting plane.
  • the two half-shells 4, 5 are also fastened to one another in the region of these connecting webs 31, 32, for example by means of a welded connection or by means of a soldered connection.
  • the X-tube 1 comprises exactly three components, namely the two half-shells 4, 5 and the bottom 13, wherein the two half-shells 4, 5 may also still be identical parts, so that in total only two different components are required to the X tube 1 manufacture.
  • Corresponding Fig. 8 comprises the exhaust system 2, with the aid of which exhaust gases can be removed from an internal combustion engine, which can not be shown in particular in a motor vehicle, two parallelteurströmbare exhaust pipes, namely a first exhaust pipe 33 and a second exhaust pipe 34.
  • the two exhaust pipes 33, 34 form one Double-flow section of the exhaust system 2. They can be flowed through in parallel and they are coupled together via the X-tube 1.
  • an inlet section 35 of the first exhaust pipe 33 is connected to the first inlet opening 7 of the X-tube 1.
  • An outlet portion 36 of the first exhaust pipe 33 is connected to the first exhaust port 10 of the X-pipe 1.
  • An inlet portion 37 of the second exhaust pipe 34 is connected to the second inlet port 8.
  • An outlet portion 38 of the second exhaust pipe 34 is connected to the second exhaust port 11.
  • the X-tube 1 allows an airborne sound transmission coupling of the two exhaust gas streams within the two exhaust pipes 33, 34, without generating a significant increase in pressure in the exhaust gas streams.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Description

Die vorliegende Erfindung betrifft ein X-Rohr für eine zumindest teilweise zweiflutige Abgasanlage einer Brennkraftmaschine, insbesondere eines Kraftfahrzeugs. Die Erfindung betrifft außerdem eine Abgasanlage für eine Brennkraftmaschine, insbesondere eines Kraftfahrzeugs, die mit einem derartigen X-Rohr ausgestattet ist.The present invention relates to an X-tube for an at least partially double-flow exhaust system of an internal combustion engine, in particular of a motor vehicle. The invention also relates to an exhaust system for an internal combustion engine, in particular a motor vehicle, which is equipped with such an X-tube.

X-Rohre, die auch als X-Hose bezeichnet werden können, werden bei Abgasanlagen, die zumindest bereichsweise zweiflutig ausgestaltet sind, dazu verwendet, die beiden parallel durchströmbaren Abgasleitungen des zweiflutigen Abschnitts miteinander zu koppeln. Diese Kopplung soll einen Druckausgleich und insbesondere einen Schalldruckausgleich zwischen den beiden Abgasleitungen ermöglichen, so dass ein Austausch von Luftschall zwischen den beiden Abgasleitungen stattfindet.X-tubes, which can also be referred to as X-pants, are used in exhaust systems, which are designed at least partially double-flow, to couple the two parallel-flow exhaust pipes of the double-flow section with each other. This coupling should allow a pressure equalization and in particular a sound pressure equalization between the two exhaust pipes, so that an exchange of airborne sound between the two exhaust pipes takes place.

Dementsprechend umfasst ein derartiges X-Rohr , wie z.B. in der DE 103 54 699 gezeigt, ein Gehäuse, das an einer Einlassseite zwei Einlassöffnungen für zwei kommende Abschnitte der beiden Abgasleitungen und an einer Auslassseite zwei Auslassöffnungen für zwei gehende Abschnitte der beiden Abgasleitungen aufweist. In einem vom Gehäuse umschlossenen Innenraum, mit dem die Öffnungen kommunizierend verbunden sind, erfolgt dann der gewünschte Druckausgleich bzw. die gewünschte Schallübertragung.Accordingly, such an X-tube, such as in the DE 103 54 699 1, a housing, which has two inlet openings for two coming sections of the two exhaust pipes on one inlet side and two outlet openings for two outgoing sections of the two exhaust pipes on one outlet side. In a space enclosed by the housing interior, with which the openings are communicatively connected, then takes place the desired pressure equalization or the desired sound transmission.

Es besteht das Bedürfnis, den Strömungswiderstand der Abgasanlage durch die Verwendung eines derartigen X-Rohrs nicht wesentlich zu erhöhen. Ferner besteht der Wunsch, ein derartiges X-Rohr möglichst preiswert herstellen zu können.There is a need not to significantly increase the flow resistance of the exhaust system through the use of such an X-tube. Furthermore, there is the desire to be able to produce such an X-tube as inexpensively as possible.

Die vorliegende Erfindung beschäftigt sich mit dem Problem, für ein X-Rohr bzw. für eine damit ausgestattete Abgasanlage eine verbesserte Ausführungsform anzugeben, die sich insbesondere dadurch auszeichnet, dass das X-Rohr einen vergleichsweise niedrigen Durchströmungswiderstand besitzt und preiswert herstellbar ist.The present invention is concerned with the problem of providing an improved embodiment for an X-tube or for an exhaust system equipped therewith, which is characterized in particular by the fact that the X-tube has a comparatively low flow resistance and is inexpensive to manufacture.

Dieses Problem wird erfindungsgemäß durch die Gegenstände der unabhängigen Ansprüche gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.This problem is solved according to the invention by the subject matters of the independent claims. Advantageous embodiments are the subject of the dependent claims.

Die Erfindung beruht auf dem allgemeinen Gedanken, das Gehäuse aus zwei Halbschalen herzustellen und im Innenraum einen für Luftschall durchlässigen Boden anzuordnen, der den Innenraum in zwei parallel durchströmbare Kanäle unterteilt. Durch den Boden können die beiden getrennt durchströmbaren Kanäle hinsichtlich einer Druckübertragung sowie hinsichtlich einer Luftschallübertragung miteinander kommunizieren. Auch ist grundsätzlich ein Gasaustausch möglich. Die Kanalisierung des Innenraums mit Hilfe des Bodens reduziert den Durchströmungswiderstand des X-Rohrs. Besonders vorteilhaft ist hierbei jedoch der Umstand, dass zur Realisierung des hier vorgestellten X-Rohrs grundsätzlich nur drei Bauteile erforderlich sind, nämlich die beiden Halbschalen und der Boden. Hierdurch wird die Herstellung des X-Rohrs extrem preiswert.The invention is based on the general idea to produce the housing from two half-shells and to arrange in the interior a permeable to airborne sound, which divides the interior into two parallel-flow channels. Through the bottom, the two separate flow-through channels can communicate with each other in terms of pressure transmission as well as airborne transmission. In principle, a gas exchange is possible. The channeling of the interior with the help of the floor reduces the flow resistance of the X-pipe. However, the fact that for the realization of the X-tube presented here basically only three components are required, namely the two half-shells and the bottom, is particularly advantageous. This makes the production of the X-tube extremely cheap.

Weiters ist vorgesehen, dass die Halbschalen zwischen den Kanälen jeweils eine Aufnahmenut aufweisen, in welche der Boden mit seinen Längsenden eingesetzt ist. Hierdurch wird eine formschlüssige Fixierung oder Positionierung des Bodens in den Halbschalen realisiert.Furthermore, it is provided that the half-shells between the channels each have a receiving groove into which the bottom is inserted with its longitudinal ends. As a result, a positive fixing or positioning of the bottom is realized in the half-shells.

Dabei weisen die Halbschalen zwischen den Kanälen jeweils zwei nach innen vorstehende, parallel zueinander verlaufende Längssicken auf, die im Innenraum zwischen sich die jeweilige Aufnahmenut ausbilden. Durch diese Bauweise lassen sich die Aufnahmenuten besonders preiswert ausbilden. Gleichzeitig führen die Sicken zu einer Aussteifung der Halbschalen im Bereich des Bodens.In this case, the half-shells between the channels each have two inwardly projecting, parallel to each other extending longitudinal beads, which form the respective receiving groove in the interior between them. By this construction, the grooves can be formed particularly inexpensive. At the same time the beads lead to a stiffening of the half shells in the area of the soil.

Der Boden kann entsprechend einer vorteilhaften Ausführungsform an einer einem der Kanäle zugewandten Seite einen randseitig umlaufenden, zum genannten Kanal hin abstehenden Kragen aufweisen. Hierdurch erfolgt eine intensive Aussteifung des Bodens, was zum einen die Abstützung der beiden Halbschalen aneinander über den Boden verbessert und zum anderen das Gehäuse im Bereich des Bodens versteift.According to an advantageous embodiment, the base may have, on a side facing one of the channels, a collar which extends peripherally and protrudes toward the said channel. This results in an intensive stiffening of the soil, which on the one hand improves the support of the two half-shells to each other on the ground and on the other stiffened the housing in the region of the bottom.

Besonders vorteilhaft ist nun eine Weiterbildung, bei welcher der Kragen einlassseitig, also anströmseitig und auslassseitig, also abströmseitig abgeflacht ist. Durch diese Abflachung des Kragens kann eine Geräuschentwicklung im X-Rohr, insbesondere beim Starten einer Brennkraftmaschine vermieden werden, deren Abgasanlage mit einem derartigen X-Rohr ausgestattet ist.Particularly advantageous is now a further development in which the collar is flattened on the inlet side, ie on the inflow side and outlet side, that is, downstream. By this flattening of the collar noise in the X-tube, especially when starting an internal combustion engine can be avoided, the exhaust system is equipped with such an X-tube.

Gemäß einer anderen vorteilhaften Ausführungsform können die beiden Halbschalen als Gleichteile ausgestaltet sein. Das bedeutet, dass beide Halbschalen identisch sind. Diese Bauweise führt dazu, dass zum Herstellen des X-Rohrs letztlich nur zwei verschiedene Bauteile verwendet werden müssen, nämlich die beiden gleichen Halbschalen und der eine Boden. Die Herstellungskosten lassen sich dadurch nochmals reduzieren.According to another advantageous embodiment, the two half-shells can be designed as identical parts. This means that both shells are identical. This design means that ultimately only two different components must be used to produce the X-tube, namely the two same half shells and the one bottom. The production costs can be further reduced.

Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.

Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Bauteile beziehen.Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.

Es zeigen, jeweils schematisch,

Fig. 1
eine perspektivische Ansicht eines X-Rohrs,
Fig. 2
eine teilweise transparente Draufsicht des X-Rohrs,
Fig. 3
eine Seitenansicht des X-Rohrs entsprechend einer Blickrichtung 111 in Fig. 2,
Fig. 4
eine Schnittansicht des X-Rohrs entsprechend Schnittlinien IV in Fig. 2,
Fig. 5
eine vereinfachte Schnittansicht des X-Rohrs entsprechend Schnittlinien V in Fig. 2,
Fig. 6
eine Schnittansicht des X-Rohrs entsprechend Schnittlinien VI in Fig. 2,
Fig. 7
eine perspektivische Ansicht des X-Rohrs bei einer entfernten Halbschale,
Fig. 8
eine perspektivische Ansicht auf eine Abgasanlage im Bereich eines X-Rohrs bei einer weggelassenen Halbschale.
Show, in each case schematically,
Fig. 1
a perspective view of an X-tube,
Fig. 2
a partially transparent top view of the X-tube,
Fig. 3
a side view of the X-tube according to a viewing direction 111 in Fig. 2 .
Fig. 4
a sectional view of the X-tube according to section lines IV in Fig. 2 .
Fig. 5
a simplified sectional view of the X-tube according to section lines V in Fig. 2 .
Fig. 6
a sectional view of the X-tube according to section lines VI in Fig. 2 .
Fig. 7
a perspective view of the X-tube at a removed half-shell,
Fig. 8
a perspective view of an exhaust system in the region of an X-tube in a omitted half-shell.

Entsprechend den Fig. 1 bis 8 umfasst ein X-Rohr 1, das entsprechend Fig. 8 bei einer zumindest teilweise zweiflutigen Abgasanlage 2 zum Einsatz kommen kann, ein Gehäuse 3, das aus zwei Halbschalen 4, 5 zusammengebaut ist. Die beiden Halbschalen 4, 5 können entsprechend einer vorteilhaften Ausführungsform als Gleichteile ausgestaltet sein. Beide Halbschalen 4, 5 sind dann identisch. Das Gehäuse 3 weist an einer Einlassseite 6 zwei Einlassöffnungen, nämlich eine erste Einlassöffnung 7 und eine zweite Einlassöffnung 8 auf. An einer von der Einlassseite 6 entfernten Auslassseite 9 weist das Gehäuse 3 zwei Auslassöffnungen, nämlich eine erste Auslassöffnung 10 und eine zweite Auslassöffnung 11 auf.According to the Fig. 1 to 8 includes an X-tube 1, which accordingly Fig. 8 can be used in an at least partially double-flow exhaust system 2, a housing 3, which is assembled from two half-shells 4, 5. The two half-shells 4, 5 can be configured in accordance with an advantageous embodiment as equal parts. Both half-shells 4, 5 are then identical. The housing 3 has two inlet openings, namely a first inlet opening 7 and a second inlet opening 8, on an inlet side 6. At an outlet side 9 remote from the inlet side 6, the housing 3 has two outlet openings, namely a first outlet opening 10 and a second outlet opening 11.

Das Gehäuse 3 umschließt einen Innenraum 12, der mit den Öffnungen 7, 8, 10, 11 kommunizierend verbunden ist. Im Innenraum 12 ist ein Boden 13 angeordnet. Dieser bildet bezüglich der beiden Halbschalen 4, 5 ein separates Bauteil. Er unterteilt den Innenraum 12 in zwei Kanäle, nämlich einen ersten Kanal 14 und einen zweiten Kanal 15. Die Unterteilung des Innenraums 12 in die beiden Kanäle 14, 15 erfolgt dabei so, dass jeder Kanal 14, 15 mit einer Einlassöffnung 7, 8 und mit einer Auslassöffnung 10, 11 kommunizierend verbunden ist. Im Beispiel ist der erste Kanal 14 mit der ersten Einlassöffnung 7 und mit der ersten Auslassöffnung 10 kommunizierend verbunden, während der zweite Kanal 15 mit der zweiten Einlassöffnung 8 und mit der zweiten Auslassöffnung 11 kommunizierend verbunden ist.The housing 3 encloses an inner space 12, which communicates with the openings 7, 8, 10, 11 communicating. In the interior 12, a bottom 13 is arranged. This forms with respect to the two half-shells 4, 5 a separate component. He subdivides the interior 12 into two channels, namely a first channel 14 and a second channel 15. The division of the interior 12 into the two channels 14, 15 takes place in such a way that each channel 14, 15 with an inlet opening 7, 8 and an outlet opening 10, 11 is communicatively connected. In the example, the first channel 14 is communicatively connected to the first inlet port 7 and to the first outlet port 10, while the first channel 14 communicates with the first channel second channel 15 is communicatively connected to the second inlet opening 8 and to the second outlet opening 11.

Der Boden 13 ist für Luftschall durchlässig ausgestaltet. Er verbindet die beiden Kanäle 14, 15 hinsichtlich einer Luftschallübertragung. Im gezeigten Beispiel enthält der Boden 13 eine Durchgangsöffnung 16, durch die die beiden Kanäle 14, 15 miteinander kommunizierend verbunden sind. Die Durchgangsöffnung 16 ist hier rein exemplarisch. Sie bildet zwar eine bevorzugte Ausführungsform, kann jedoch grundsätzlich auch durch eine Perforation gebildet sein. Ebenso sind kiemenförmige Öffnungen denkbar, die entgegen der Strömungsrichtung geöffnet bzw. geschlossen sind und bspw. Strömungsgeräusche reduzieren. Ebenso kann der Boden 13 mit einem aerodynamisch hinsichtlich Strömungsgeräuschen und - widerstand optimierten Schlitz versehen sein.The bottom 13 is made permeable to airborne sound. It connects the two channels 14, 15 with respect to an airborne sound transmission. In the example shown, the bottom 13 includes a passage opening 16 through which the two channels 14, 15 are communicatively connected to each other. The passage opening 16 is purely exemplary here. Although it forms a preferred embodiment, but may in principle be formed by a perforation. Likewise, gill-shaped openings are conceivable, which are open or closed against the flow direction and, for example, reduce flow noise. Likewise, the bottom 13 can be provided with an aerodynamically optimized slot with regard to flow noise and resistance.

Die beiden Halbschalen 4, 5 weisen entsprechend der hier gezeigten, bevorzugten Ausführungsform zwischen den Kanälen 14, 15 jeweils eine Aufnahmenut 17 auf. Die beiden Aufnahmenuten 17 liegen sich im Innenraum 12 gegenüber und bilden gemeinsam eine Aufnahme, in welche der Boden 13 mit seinen Längsenden 18 eingesetzt ist. Um die Aufnahmenuten 17 auszubilden, weisen die Halbschalen 4, 5 an ihren Außenseiten jeweils zwei nach innen vorstehende, parallel zueinander verlaufende Längssicken 19 aufweisen. Im Innenraum 12 verlaufen die beiden Längssicken 19 zueinander beabstandet, so dass sie zwischen sich die jeweilige Aufnahmenut 17 bilden. Die Längssicken 19 bilden eine intensive Aussteifung der jeweiligen Halbschale 4, 5 im Bereich des Bodens 13.The two half-shells 4, 5 have according to the preferred embodiment shown here between the channels 14, 15 each have a receiving groove 17. The two grooves 17 are located in the interior 12 opposite and together form a receptacle into which the bottom 13 is inserted with its longitudinal ends 18. In order to form the receiving grooves 17, the half-shells 4, 5 each have on their outer sides two inwardly projecting, mutually parallel longitudinal corrugations 19. In the interior 12, the two longitudinal beads 19 are spaced apart from each other, so that they form the respective receiving groove 17 between them. The longitudinal corrugations 19 form an intensive stiffening of the respective half-shell 4, 5 in the region of the bottom 13.

Der Boden 13 ist im Gehäuse 3 lagefixiert. Diese Lagefixierung kann dabei durch eine Verspannung mit den Halbschalen 4, 5 realisiert sein. Die Lagefixierung erfolgt dann ausschließlich durch Kraftschluss bzw. Reibschluss. Alternativ oder zusätzlich kann auch eine Schweißverbindung oder eine Lötverbindung des Bodens 13 mit mindestens einer der Halbschalen 4, 5 vorgesehen sein, um den Boden 13 im Gehäuse 3 hinsichtlich seiner Position oder Lage zu fixieren. Beispielsweise kann die Verspannung des Bodens 13 beim Verbinden der beiden Halbschalen 4, 5 aneinander realisiert werden. Beispielsweise werden die beiden Halbschalen 4, 5 entlang von nach außen abstehenden Flanschstegen 20 miteinander verschweißt. Beim Herstellen dieser Schweißverbindungen kann auch der Boden 13 von außen durch die jeweilige Halbschale 4, 5 hindurch mit der jeweiligen Halbschale 4, 5 verschweißt werden.The bottom 13 is fixed in position in the housing 3. This fixation can be realized by a tension with the half shells 4, 5. The fixation then takes place exclusively by adhesion or frictional engagement. Alternatively or In addition, a welded joint or a solder joint of the bottom 13 with at least one of the half-shells 4, 5 may be provided to fix the bottom 13 in the housing 3 with respect to its position or position. For example, the tension of the bottom 13 when connecting the two half-shells 4, 5 are realized together. For example, the two half shells 4, 5 are welded together along outwardly projecting flange webs 20. When producing these welds, the bottom 13 can also be welded from the outside through the respective half-shell 4, 5 through to the respective half-shell 4, 5.

Der Boden 13 ist bei der hier gezeigten Ausführungsform eben ausgestaltet, so dass er sich in einer Ebene erstreckt. Die Ebene des Bodens 13 erstreckt sich dabei parallel zu den beiden Kanälen 14, 15. Die beiden Kanäle 14, 15 erstrecken sich ihrerseits jeweils parallel zueinander und jeweils parallel zu einer im jeweiligen Kanal 14, 15 vorherrschenden Hauptströmungsrichtung 21, die in Fig. 2 durch Pfeile angedeutet ist. Ferner erstreckt sich die Ebene des Bodens 13 senkrecht zu einer Trennebene, in der die beiden Halbschalen 4, 5 aneinander befestigt sind. Diese Trennebene kann insbesondere eine Symmetrieebene für die beiden Halbschalen 4, 5 bilden. Darüber hinaus kann die Trennebene der Halbschalen 4, 5 auch eine Symmetrieebene für den Boden 13 bilden, wenn er entsprechend der hier gezeigten Ausführungsform bezüglich dieser Trennebene spiegelsymmetrisch geformt ist.In the embodiment shown here, the bottom 13 is designed so that it extends in one plane. The plane of the bottom 13 extends parallel to the two channels 14, 15. The two channels 14, 15 extend in each case parallel to each other and each parallel to a prevailing in the respective channel 14, 15 main flow direction 21, the Fig. 2 indicated by arrows. Further, the plane of the bottom 13 extends perpendicular to a parting plane in which the two half-shells 4, 5 are fastened to each other. This parting plane can in particular form a plane of symmetry for the two half-shells 4, 5. In addition, the parting plane of the half-shells 4, 5 can also form a plane of symmetry for the bottom 13, if it is mirror-symmetrical in shape according to the embodiment shown here with respect to this parting plane.

In der Draufsicht gemäß Fig. 2 besitzen die Strömungspfade innerhalb des X-Rohrs 1 eine X-förmige Kontur, was zur Bezeichnung "X-Rohr" oder "X-Hose" führt.In the plan view according to Fig. 2 For example, the flow paths within the X-tube 1 have an X-shaped contour, which leads to the term "X-tube" or "X-pants".

Der Boden 13 kann entsprechend der hier gezeigten, bevorzugten Ausführungsform an einer Seite, die einem der Kanäle 14, 15, hier dem ersten Kanal 14 zugewandt ist, einen Kragen 22 aufweisen, der randseitig vollständig umlaufend ausgestaltet ist. Ferner steht der Kragen 22 zu besagtem Kanal 14, 15, also hier zum ersten Kanal 14 hin vom übrigen Boden 13 bzw. von der Ebene des Bodens 13 ab. Entsprechend den Fig. 2, 7 und 8 ist der Kragen 22 bei der hier vorgestellten bevorzugten Ausführungsform einlassseitig und auslassseitig abgeflacht. Das bedeutet, dass die Höhe des Kragens 22, mit welcher der Kragen 22 vom übrigen Boden 13 bzw. von der Ebene des Bodens 13 absteht, einlassseitig und auslassseitig kleiner ist als in einem mittleren Abschnitt. Insbesondere nimmt die Kragenhöhe vom mittleren Abschnitt bis zu einem Einlassende 23 des Bodens 13 sowie bis zu einem Auslassende 24 des Bodens 13 ungestuft und insbesondere stetig ab. Diese Höhenabnahme erfolgt dabei ausgehend von beiden Längsenden 18 des Bodens 13 und - wie oben erwähnt - bevorzugt spiegelsymmetrisch zur Trennebene der Halbschalen 4, 5.The bottom 13 can according to the preferred embodiment shown here on one side, the one of the channels 14, 15, here the first Channel 14 faces, having a collar 22 which is configured peripherally completely circumferential. Furthermore, the collar 22 to said channel 14, 15, so here to the first channel 14 out of the rest of the bottom 13 and 13 from the plane of the bottom. According to the Fig. 2 . 7 and 8th the collar 22 is flattened on the inlet side and the outlet side in the preferred embodiment presented here. This means that the height of the collar 22, with which the collar 22 protrudes from the rest of the bottom 13 or from the plane of the bottom 13, on the inlet side and outlet side is smaller than in a central portion. In particular, the collar height from the central portion to an inlet end 23 of the bottom 13 as well as to an outlet end 24 of the bottom 13 decreases unrestrained and in particular steadily. This height decrease takes place starting from both longitudinal ends 18 of the bottom 13 and - as mentioned above - preferably mirror-symmetrical to the parting plane of the half-shells 4, 5.

Vorzugsweise besitzt der Boden 13 in einer senkrecht zu seiner Ebene orientierten Projektion einen ovalen Grundriss, der einen rechteckigen Mittelabschnitt 25 und zwei halbkreisförmige Endabschnitte 26 umfasst. Die Abflachungen des Kragens 22 sind vorzugsweise ausschließlich in den Endabschnitten 26 ausgebildet. Im gezeigten Beispiel ist die einzige Durchgangsöffnung 16 kongruent zum Boden 13 geformt und besitzt dementsprechend auch einen ovalen Öffnungsquerschnitt.Preferably, in a projection oriented perpendicular to its plane, the bottom 13 has an oval plan, which comprises a rectangular central portion 25 and two semicircular end portions 26. The flats of the collar 22 are preferably formed exclusively in the end portions 26. In the example shown, the single passage opening 16 is formed congruent to the bottom 13 and accordingly also has an oval opening cross-section.

Das Gehäuse 3 umfasst zwei Einlassabschnitte, nämlich einen ersten Einlassabschnitt 27, der die erste Einlassöffnung 7 umfasst und mit dem ersten Kanal 14 kommunizierend verbindet, und einen zweiten Einlassabschnitt 28, der die zweite Einlassöffnung umfasst und mit dem zweiten Kanal 15 kommunizierend verbindet. Ferner weist das Gehäuse 3 zwei Auslassabschnitte auf, nämlich einen ersten Auslassabschnitt 29, der die erste Auslassöffnung 10 umfasst und mit dem ersten Kanal 14 kommunizierend verbindet, und einen zweiten Auslassabschnitt 30, der die zweite Auslassöffnung 11 umfasst und mit dem zweiten Kanal 15 kommunizierend verbindet. Die Einlassabschnitte 27, 28 und die Auslassabschnitte 29, 30 sind jeweils hälftig an den Halbschalen 4, 5 ausgeformt. Ebenso bilden die Halbschalen 4, 5 jeweils nur die Hälfte der Öffnungen 7, 8, 10, 11, die erst bei zusammengebautem Gehäuse 3 zu vollständigen Öffnungen 7, 8, 10, 11 komplettiert werden.The housing 3 includes two inlet portions, namely, a first inlet portion 27 that includes the first inlet port 7 and communicates with the first channel 14, and a second inlet portion 28 that includes the second inlet port and communicates with the second channel 15. Furthermore, the housing 3 has two outlet sections, namely a first outlet section 29, which comprises the first outlet opening 10 and communicates with the first channel 14, and a second outlet portion 30 which includes the second outlet port 11 and communicates with the second channel 15 communicatively. The inlet sections 27, 28 and the outlet sections 29, 30 are each formed in half on the half-shells 4, 5. Likewise, the half shells 4, 5 each form only half of the openings 7, 8, 10, 11, which are completed only when assembled housing 3 to complete openings 7, 8, 10, 11.

Die Halbschalen 4, 5 besitzen jeweils an der Einlassseite 6 und an der Auslassseite 9 jeweils einen Verbindungssteg 31 bzw. 32. Insgesamt sind somit vier derartige Verbindungsstege vorgesehen, nämlich zwei einlassseitige Verbindungsstege 31 und zwei auslassseitige Verbindungsstege 32. Die Verbindungsstege 31, 32 befinden sich dabei außerhalb des Innenraums 12. Je zwei Verbindungsstege 31, 32, nämlich die beiden einlassseitigen Verbindungsstege 31 und die beiden auslassseitigen Verbindungsstege 32 liegen flächig aneinander an, und zwar in der Trennebene. Vorzugsweise sind die beiden Halbschalen 4, 5 auch im Bereich dieser Verbindungsstege 31, 32 aneinander befestigt, bspw. mittels einer Schweißverbindung oder mittels einer Lötverbindung.The half-shells 4, 5 each have on the inlet side 6 and on the outlet side 9 a connecting web 31 and 32, respectively. Thus, four such connecting webs are provided, namely two inlet-side connecting webs 31 and two outlet-side connecting webs 32. The connecting webs 31, 32 are located In each case two connecting webs 31, 32, namely the two inlet-side connecting webs 31 and the two outlet-side connecting webs 32 lie flat against each other, in the parting plane. Preferably, the two half-shells 4, 5 are also fastened to one another in the region of these connecting webs 31, 32, for example by means of a welded connection or by means of a soldered connection.

Im gezeigten Beispiel umfasst das X-Rohr 1 genau drei Bauteile, nämlich die beiden Halbschalen 4, 5 und den Boden 13, wobei die beiden Halbschalen 4, 5 außerdem noch Gleichteile sein können, so dass insgesamt nur zwei verschiedene Bauteil erforderlich sind, um das X-Rohr 1 herzustellen.In the example shown, the X-tube 1 comprises exactly three components, namely the two half-shells 4, 5 and the bottom 13, wherein the two half-shells 4, 5 may also still be identical parts, so that in total only two different components are required to the X tube 1 manufacture.

Entsprechend Fig. 8 umfasst die Abgasanlage 2, mit deren Hilfe Abgase von einer hier nicht gezeigten Brennkraftmaschine, die insbesondere in einem Kraftfahrzeug angeordnet sein kann, abtransportiert werden können, zwei parallel durchströmbare Abgasleitungen, nämlich eine erste Abgasleitung 33 und eine zweite Abgasleitung 34. Die beiden Abgasleitungen 33, 34 bilden einen zweiflutigen Abschnitt der Abgasanlage 2. Sie sind parallel durchströmbar und sie sind über das X-Rohr 1 miteinander gekoppelt. Hierzu ist ein Einlassabschnitt 35 der ersten Abgasleitung 33 an die erste Einlassöffnung 7 des X-Rohrs 1 angeschlossen. Ein Auslassabschnitt 36 der ersten Abgasleitung 33 ist an die erste Auslassöffnung 10 des X-Rohrs 1 angeschlossen. Ein Einlassabschnitt 37 der zweiten Abgasleitung 34 ist an die zweite Einlassöffnung 8 angeschlossen. Ein Auslassabschnitt 38 der zweiten Abgasleitung 34 ist an die zweite Auslassöffnung 11 angeschlossen. Das X-Rohr 1 ermöglicht eine Luftschall übertragende Kopplung der beiden Abgasströme innerhalb der beiden Abgasleitungen 33, 34, ohne dabei einen signifikanten Druckanstieg in den Abgasströmen zu erzeugen.Corresponding Fig. 8 comprises the exhaust system 2, with the aid of which exhaust gases can be removed from an internal combustion engine, which can not be shown in particular in a motor vehicle, two parallel durchströmbare exhaust pipes, namely a first exhaust pipe 33 and a second exhaust pipe 34. The two exhaust pipes 33, 34 form one Double-flow section of the exhaust system 2. They can be flowed through in parallel and they are coupled together via the X-tube 1. For this purpose, an inlet section 35 of the first exhaust pipe 33 is connected to the first inlet opening 7 of the X-tube 1. An outlet portion 36 of the first exhaust pipe 33 is connected to the first exhaust port 10 of the X-pipe 1. An inlet portion 37 of the second exhaust pipe 34 is connected to the second inlet port 8. An outlet portion 38 of the second exhaust pipe 34 is connected to the second exhaust port 11. The X-tube 1 allows an airborne sound transmission coupling of the two exhaust gas streams within the two exhaust pipes 33, 34, without generating a significant increase in pressure in the exhaust gas streams.

Claims (12)

  1. An X-pipe for an at least partially twin-pipe exhaust system (2) of an internal combustion engine, in particular of a motor vehicle,
    - with a housing (3), which on an inlet side (6) comprises two inlet openings (7, 8) and on an outlet side (9) comprises two outlet openings (10, 11),
    - with an interior space (12) which is enclosed by the housing (3) and to which the openings (7, 8, 10, 11) are communicatingly connected,
    - with a bottom (13), which divides the interior space (12) into two channels (14, 15), which are each communicatingly connected to an inlet opening (7, 8) and an outlet opening (10, 11) each,
    - wherein the bottom (13) is configured permeable to airborne sound and interconnects the two channels (14, 15) in an airborne sound-transmitting manner,
    characterized in that
    - the housing (3) consists of two half shells (4, 5),
    - the bottom (13) with respect to the two half shells (4, 5) is configured as a separate component,
    - the half shells (4, 5) between the channels (14, 15) each comprise two longitudinal beads (19) projecting to the inside and running parallel to one another, which in the interior space (12) between them form a receiving groove (17) each, into which the bottom (13) with its longitudinal ends (18) is inserted.
  2. The X-pipe according to Claim 1,
    characterized in that
    the bottom (13) is fixed in position in the housing (3) through bracing with the half shells (4, 5) or through a welded connection with at least one of the half shells (4, 5).
  3. The X-pipe according to any one of the Claims 1 and 2,

    characterized in that
    the bottom (13) extends in a plane which extends parallel to the main flow directions (21) prevailing in the two channels (14, 15) and which are parallel to one another and which runs perpendicularly to a separating plane, in which the half shells (4, 5) are fastened to one another.
  4. The X-pipe according to any one of the Claims 1 to 3,
    characterized in that
    the bottom (13) on a side facing one of the channels (14) comprises a circumferential collar (22) on the edge side projecting towards this channel (14).
  5. The X-pipe according to Claim 4,
    characterized in that
    the collar (22) is flattened on the inlet side and outlet side.
  6. The X-pipe according to any one of the Claims 1 to 5,
    characterized in that
    the bottom (13) has an oval outline with a rectangular middle portion (25) and two semi-circular end portions (26).
  7. The X-pipe according to the Claims 5 and 6,
    characterized in that
    the flats are each formed exclusively in the end portions (26).
  8. The X-pipe according to any one of the Claims 1 to 7,
    characterized in that
    the bottom (13) with respect to a separating plane, in which the half shells (4, 5) are fastened to one another, is formed mirror-symmetrically.
  9. The X-pipe according to any one of the Claims 1 to 8,
    characterized in that
    the two half shells (4, 5) are configured as identical parts.
  10. The X-pipe according to any one of the Claims 1 to 9,
    characterized in that
    - on the housing (2) two inlet portions (27, 28) are formed, each of which connect one of the inlet openings (7, 8) to one of the channels (14, 15),
    - on the housing (3) two outlet portions (29, 30) are formed, each of which connect one of the outlet openings (10, 11) to one of the channels (14, 15).
  11. The X-pipe according to any one of the Claims 1 to 10,
    characterized in that
    the half shells (4, 5) each comprise a connecting web (31, 32) on the inlet side (6) and on the outlet side (9) outside of the interior space (12), which abut one another in a flat manner.
  12. An exhaust system for an internal combustion engine, in particular of a motor vehicle, with two exhaust lines (33, 34) which can be subjected to a parallel through-flow, which are coupled to one another via an X-pipe (1) according to any one of the Claims 1 to 11.
EP09175662.7A 2008-12-11 2009-11-11 X-tube and accompanying exhaust gas assembly Active EP2199559B1 (en)

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EP2199559A1 (en) 2010-06-23
CN101761378B (en) 2013-03-27
DE102008061829A1 (en) 2010-07-08
CN101761378A (en) 2010-06-30
US8209972B2 (en) 2012-07-03
US20100146955A1 (en) 2010-06-17

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