EP1788216B1 - Intermediate cross connection for an exhaust system - Google Patents

Intermediate cross connection for an exhaust system Download PDF

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Publication number
EP1788216B1
EP1788216B1 EP06122634A EP06122634A EP1788216B1 EP 1788216 B1 EP1788216 B1 EP 1788216B1 EP 06122634 A EP06122634 A EP 06122634A EP 06122634 A EP06122634 A EP 06122634A EP 1788216 B1 EP1788216 B1 EP 1788216B1
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EP
European Patent Office
Prior art keywords
crosstalk
plane
crosstalk device
exhaust
outlet
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EP06122634A
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German (de)
French (fr)
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EP1788216A1 (en
Inventor
Arnulf Spieth
Markus Tüch
Michael Krause
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Eberspaecher Climate Control Systems GmbH and Co KG
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J Eberspaecher GmbH and Co KG
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Publication of EP1788216A1 publication Critical patent/EP1788216A1/en
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    • 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
    • F01N13/04—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 having two or more silencers in parallel, e.g. having interconnections for multi-cylinder engines
    • 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

Definitions

  • the invention relates to a crosstalk for the fluidic and / or acoustic coupling of two exhaust passages of an exhaust system of an internal combustion engine which can be flowed through in parallel by exhaust gas, in particular in a motor vehicle.
  • the invention also relates to a dual-flow exhaust system equipped with such a crosstalk.
  • Such crosstalkers are used in dual-flow exhaust systems, ie in exhaust systems with two exhaust gas streams which can be flowed through in parallel by exhaust gas for influencing the acoustics of the exhaust system, that is to say within the framework of the so-called sound design. See eg GB 2 161 215 A , The aim is to initiate airborne sound transported in one exhaust system into the other exhaust system and vice versa.
  • Such crosstines are exposed during operation of the exhaust system high thermal and mechanical loads, which can be attributed in particular to the fact that the two via the crosstalk also mechanically coupled to each other exhaust strands are loaded differently.
  • the present invention is concerned with the problem of providing an improved embodiment for a crosstalk of the type mentioned, which is characterized in particular by an inexpensive manufacturability and a relatively high fatigue strength.
  • the invention is based on the general idea of assembling a two inlets and two outlets housing of the crosstalk of two half-shells, which are designed so that their parting plane extends transversely to a main flow direction of the crosstalk. Due to the selected configuration of the half-shells or by the resulting orientation of the parting plane can be achieved in the crosstalk, a stress distribution, a fastening, via which the two half-shells are fastened together, e.g. a welded joint, only comparatively low loaded. Furthermore, the crosstalk in this construction can be made very compact and at the same time with a high rigidity. At the same time, the crosstalk can be produced comparatively inexpensively.
  • the half shells can be designed as sheet metal parts, which are produced by forming.
  • the proposed construction also has the consequence that the dividing plane neither through the two inlets yet extends through the two outlets, so that the inlets and the outlets are each undivided.
  • This has the consequence that when installing the crosstalk in the two exhaust gas lines of the exhaust system pipe body of the exhaust system can be attached to the inlets and outlets with uninterrupted, fully circumferential welds.
  • it is also possible to reduce stress peaks within the weld seams, thereby increasing the durability of the crosstalk incorporated in the exhaust system.
  • the two half-shells are designed such that they can be plugged into each other in the main flow direction of the crosstalk, so that plug-in areas of the two half-shells overlap each other in the mounted state. Due to the nested shells results in the region of the parting plane, a material doubling, which leads to a significant stiffening of the crosstalk.
  • the plug-in areas of the two half-shells are configured asymmetrically with respect to a dividing plane which extends perpendicular to the parting plane.
  • the asymmetry is configured such that an outer plug-in portion of the one half-shell arranged on the one hand of the dividing plane is plugged externally onto an inner plug-in portion of the other half-shell, while an inner plug-in portion of the one half shell arranged on the other hand inside is plugged into an outer plug portion of the other half-shell.
  • a dual-flow exhaust system 1 has two exhaust gas lines, namely a first exhaust line 2 and a second exhaust line 3.
  • the exhaust system 1 is used for discharging exhaust gases of an internal combustion engine 4.
  • the two exhaust gas lines 2, 3 are connected to the internal combustion engine 4 and are in parallel through which the exhaust gas in the operation of the internal combustion engine 4.
  • the exhaust gas strands 2, 3 can in the usual way, not shown here facilities for exhaust gas purification, such as catalyst and particulate filter, and to contain soundproofing.
  • the Internal combustion engine 4 is arranged together with its exhaust system 1 in a motor vehicle.
  • the exhaust system 1 also has a crosstalk 5, which serves to couple the two exhaust gas lines 2, 3 fluidly and / or acoustically with each other.
  • the acoustic coupling causes airborne sound that is transported in the operation of the internal combustion engine 4 in the exhaust gas lines 2, 3, via the crosstip 5 from the first exhaust line 2 into the second exhaust line 3 passes and vice versa.
  • the fluidic coupling causes exhaust gas, which is discharged during operation of the internal combustion engine 4 through the exhaust gas lines 2, 3, via the crosstalk from the first exhaust line 2 can basically get into the second exhaust line and vice versa.
  • the crosstalk 5 essentially serves to acoustically influence the exhaust system 1.
  • the crosstalk 5 has a housing 6 which has two inlets, namely a first inlet 7 and a second inlet 8, and two outlets, namely a first outlet 9 and a second outlet 10.
  • the first exhaust line 2 is connected via the first inlet 7 and the first outlet 9 to the crosstalk 5
  • the second exhaust line 3 is connected via the second inlet 8 and the second outlet 10 to the crosstalk 5.
  • the housing 6 has an inner space 11, via which the inlets 7, 8 and the outlets 9, 10 communicate fluidly with each other.
  • the fluidic and / or acoustic coupling of the two exhaust gas strands 2, 3 takes place via this inner space 11. Said coupling is in Fig. 1 symbolized by a double arrow and designated 12.
  • the exhaust gases flow through the crosstalk 5 in a main flow direction 13, which is symbolized by arrows in the figures.
  • the main flow direction 13 of the crosstalk 5 thus corresponds to the main flow direction of the exhaust gas within the respective exhaust line 2, 3 in the region of the crosstalk 5, So when passing the crosstalk 5.
  • Fig. 2 to 8 is the housing 6 of two half-shells, namely a first half-shell 14 and a second half-shell 15, assembled.
  • the two half shells 14, 15 have a parting plane 16, which extends transversely to the main flow direction 13 of the crosstalk 5. Due to this embodiment of the half-shells 14, 15, the first half-shell 14, the two inlets 7, 8.
  • the second half-shell 15 has both outlets 9, 10.
  • the parting plane 16 thus extends between the inlets 7, 8 which on the one hand the Parting plane 16 are located, and the outlets 9, 10, on the other hand, the parting plane 16 are located. At the same time, the parting plane 16 extends through the inner space 11.
  • the two half-shells 14, 15 are designed so that they are inserted into one another in the mounted state shown, in the main flow direction 13 of the crosstalk 5.
  • the overlapping area formed by the mating plug-in areas 17, 18 occurs within the housing 6 to a material doubling, which leads to an intensive stiffening of the housing 6 in this housing area ,
  • the parting plane 16 extends precisely in this overlapping region, that is to say through the plug-in regions 17, 18.
  • the plug-in regions 17, 18 are designed asymmetrically with respect to a graduation plane 19.
  • This dividing plane 19 extends perpendicular to the dividing plane 16.
  • each plug-in area 17, 18 is divided into an outer plug-in portion 17a or 18a arranged on the one hand of the dividing plane 19, and an outer plug-in portion 17a or 18a arranged on the other hand.
  • the two half-shells 14, 15 in the region of their parting plane 16 half attached to the other half shell 14, 15 and half in the other half shell 14, 15 inserted.
  • the embodiment shown here has the advantage that the two half-shells 14, 15 can be configured as identical parts. Similar parts increase the number of pieces and reduce the unit price, so that the crosstalk 5 can be produced particularly inexpensively by this measure.
  • the dividing plane 19 extends as in the embodiments shown here, so that it extends through both inlets 7, 8 and through both outlets 9, 10.
  • forces which are introduced via the exhaust gas strands 2, 3 to the crosstalk 5 can be transmitted in a particularly favorable manner via the stiffened overlap region.
  • the dividing plane 19 it is basically possible to arrange the dividing plane 19 such that the first inlet 7 and the first outlet 9, which are both assigned to the first exhaust gas line 2, are located on the one hand the dividing plane 19 and the second inlet 8 and the second outlet 10 , which are both associated with the second exhaust line 3, on the other hand, the division plane 19 are located.
  • the two half shells 14, 15 in the assembled state of the crosstalk 5 by a single, closed circumferential weld 20 are fastened together.
  • the weld 20 is exemplary only in the sectional views of Fig. 5, 6 and 8th indicated.
  • the weld seam 20 thus extends along the edge of the outer plug-in part regions 17a and 18a, thereby closing slots 21 which are required to form the split plug-in regions 17, 18 and to be mutually interlocked. Due to the closed circumferential weld 20, the housing 6 is sufficiently tight.
  • inlets 7, 8 each configured as an inlet port and the two outlets 9, 10 each as an outlet.
  • a first inlet port 22, a second inlet port 23, a first outlet port 24 and a second outlet port 25 are provided.
  • the dimensioning of the nozzle 22 to 25 is tuned to the exhaust lines 2, 3 so that the respective exhaust line 2, 3 either in the respective nozzle 22 to 25 can be inserted or plugged onto the respective nozzle 22 to 25.
  • a closed circumferential weld seam can be provided in the region of each connecting piece 22 to 25.
  • the welds for connecting the exhaust gas lines 2, 3 can be performed without interruption, whereby these are exposed in operation reduced voltages and have an increased durability.
  • the compact design embodiment shown here is also distinguished by the fact that both inlets 7, 8 lie in a common inlet level, which is not designated in more detail, and runs in particular parallel to the parting plane 16.
  • the two outlets 9, 10 in a common, unspecified outlet level, which is preferably parallel to the parting plane 16.
  • the crosstalk 5 allows through its interior 11, the acoustic and the fluidic, here pneumatic, coupling between the two exhaust lines 2, 3, when the crosstalk 5 is installed in the exhaust system 1.
  • the two exhaust gas lines 2, 3 are mechanically connected to each other via the crosstip 5.
  • the mechanical connection between the two exhaust gas lines 2, 3 realized by the crosstalk 5 is in the operation of the exhaust system 1 exposed to high loads.
  • the structure shown here of the crosstalk 5 allows a favorable stress distribution, since the directions in which the forces occurring between the two exhaust gas lines 2, 3 are mainly transmitted, lie substantially in the parting plane 16.
  • the crosstalk 5 is characterized by a particularly high rigidity due to its design in the region of its parting plane 16. Accordingly, the crosstalk 5 has a relatively high durability in view of the loads occurring.

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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 Erfindung betrifft einen Übersprecher zum fluidischen und/oder akustischen Koppeln von zwei parallel von Abgas durchströmbaren Abgassträngen einer Abgasanlage einer Brennkraftmaschine, insbesondere in einem Kraftfahrzeug. Die Erfindung betrifft außerdem eine mit einem derartigen Übersprecher ausgestattete zweiflutige Abgasanlage.The invention relates to a crosstalk for the fluidic and / or acoustic coupling of two exhaust passages of an exhaust system of an internal combustion engine which can be flowed through in parallel by exhaust gas, in particular in a motor vehicle. The invention also relates to a dual-flow exhaust system equipped with such a crosstalk.

Derartige Übersprecher werden bei zweiflutigen Abgasanlagen, also bei Abgasanlagen mit zwei parallel von Abgas durchströmbaren Abgassträngen zur Beeinflussung der Akustik der Abgasanlage, also im Rahmen des sogenannten Sounddesigns verwendet. Siehe z.B. GB 2 161 215 A . Ziel ist es dabei, in dem einen Abgasstrang transportierten Luftschall in den anderen Abgasstrang einzuleiten und vice versa. Derartige Übersprecher sind im Betrieb der Abgasanlage hohen thermischen und mechanischen Belastungen ausgesetzt, die sich insbesondere darauf zurückführen lassen, dass die beiden über den Übersprecher auch mechanisch miteinander gekoppelten Abgasstränge unterschiedlich belastet sind.Such crosstalkers are used in dual-flow exhaust systems, ie in exhaust systems with two exhaust gas streams which can be flowed through in parallel by exhaust gas for influencing the acoustics of the exhaust system, that is to say within the framework of the so-called sound design. See eg GB 2 161 215 A , The aim is to initiate airborne sound transported in one exhaust system into the other exhaust system and vice versa. Such crosstines are exposed during operation of the exhaust system high thermal and mechanical loads, which can be attributed in particular to the fact that the two via the crosstalk also mechanically coupled to each other exhaust strands are loaded differently.

Die vorliegende Erfindung beschäftigt sich mit dem Problem, für einen Übersprecher der eingangs genannten Art eine verbesserte Ausführungsform anzugeben, die sich insbesondere durch eine preiswerte Herstellbarkeit und eine relativ hohe Dauerfestigkeit auszeichnet.The present invention is concerned with the problem of providing an improved embodiment for a crosstalk of the type mentioned, which is characterized in particular by an inexpensive manufacturability and a relatively high fatigue strength.

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, ein zwei Einlässe und zwei Auslässe aufweisendes Gehäuse des Übersprechers aus zwei Halbschalen zusammenzubauen, die so ausgestaltet sind, dass sich ihre Trennebene quer zu einer Hauptdurchströmungsrichtung des Übersprechers erstreckt. Durch die gewählte Ausgestaltung der Halbschalen bzw. durch die sich daraus ergebende Orientierung der Trennebene lässt sich im Übersprecher eine Spannungsverteilung erzielen, die eine Befestigung, über die die beiden Halbschalen aneinander befestigt sind, z.B. eine Schweißverbindung, nur vergleichsweise gering belastet. Des weiteren kann der Übersprecher bei dieser Bauweise sehr kompakt und gleichzeitig mit einer hohen Steifigkeit ausgestaltet werden. Gleichzeitig lässt sich der Übersprecher vergleichsweise preiswert herstellen. Beispielsweise können die Halbschalen als Blechteile ausgestaltet sein, die durch Umformung hergestellt sind.The invention is based on the general idea of assembling a two inlets and two outlets housing of the crosstalk of two half-shells, which are designed so that their parting plane extends transversely to a main flow direction of the crosstalk. Due to the selected configuration of the half-shells or by the resulting orientation of the parting plane can be achieved in the crosstalk, a stress distribution, a fastening, via which the two half-shells are fastened together, e.g. a welded joint, only comparatively low loaded. Furthermore, the crosstalk in this construction can be made very compact and at the same time with a high rigidity. At the same time, the crosstalk can be produced comparatively inexpensively. For example, the half shells can be designed as sheet metal parts, which are produced by forming.

Die vorgeschlagene Bauweise hat außerdem zur Folge, dass sich die Trennebene weder durch die beiden Einlässe noch durch die beiden Auslässe erstreckt, so dass die Einlässe und die Auslässe jeweils ungeteilt sind. Dies hat zur Folge, dass beim Einbau des Übersprechers in die beiden Abgasstränge der Abgasanlage Rohrkörper der Abgasanlage mit unterbrechungsfreien, vollständig umlaufenden Schweißnähten an den Einlässen und an den Auslässen befestigt werden können. Somit lassen sich auch im Bereich der Einlässe und im Bereich der Auslässe Spannungsspitzen innerhalb der Schweißnähte reduzieren, wodurch die Dauerhaltbarkeit des in die Abgasanlage eingebundenen Übersprechers erhöht wird.The proposed construction also has the consequence that the dividing plane neither through the two inlets yet extends through the two outlets, so that the inlets and the outlets are each undivided. This has the consequence that when installing the crosstalk in the two exhaust gas lines of the exhaust system pipe body of the exhaust system can be attached to the inlets and outlets with uninterrupted, fully circumferential welds. Thus, in the area of the inlets and in the area of the outlets, it is also possible to reduce stress peaks within the weld seams, thereby increasing the durability of the crosstalk incorporated in the exhaust system.

Bei einer bevorzugten Ausführungsform sind die beiden Halbschalen so ausgestaltet, dass sie in der Hauptdurchströmungsrichtung des Übersprechers ineinander steckbar sind, so dass sich im montierten Zustand Steckbereiche der beiden Halbschalen gegenseitig überlappen. Durch die ineinander gesteckten Halbschalen ergibt sich im Bereich der Trennebene eine Materialdopplung, die zu einer signifikanten Versteifung des Übersprechers führt.In a preferred embodiment, the two half-shells are designed such that they can be plugged into each other in the main flow direction of the crosstalk, so that plug-in areas of the two half-shells overlap each other in the mounted state. Due to the nested shells results in the region of the parting plane, a material doubling, which leads to a significant stiffening of the crosstalk.

Besonders vorteilhaft ist eine Ausführungsform, bei der die Steckbereiche der beiden Halbschalen bezüglich einer Teilungsebene, die sich senkrecht zur Trennebene erstreckt, asymmetrisch ausgestaltet sind. Die Asymmetrie ist dabei so ausgestaltet, dass ein einerseits der Teilungsebene angeordneter äußerer Steckteilbereich der einen Halbschale außen auf einen inneren Steckteilbereich der anderen Halbschale aufgesteckt ist, während ein andererseits der Teilungsebene angeordneter innerer Steckteilbereich der einen Halbschale innen in einen äußeren Steckteilbereich der anderen Halbschale eingesteckt ist. Ein großer Vorteil dieser Ausführungsform wird darin gesehen, dass es grundsätzlich möglich ist, die Halbschalen als Gleichteile auszugestalten. Der Aufwand zur Herstellung des Übersprechers wird dadurch beträchtlich reduziert.Particularly advantageous is an embodiment in which the plug-in areas of the two half-shells are configured asymmetrically with respect to a dividing plane which extends perpendicular to the parting plane. The asymmetry is configured such that an outer plug-in portion of the one half-shell arranged on the one hand of the dividing plane is plugged externally onto an inner plug-in portion of the other half-shell, while an inner plug-in portion of the one half shell arranged on the other hand inside is plugged into an outer plug portion of the other half-shell. A great advantage of this embodiment is seen in the fact that it is basically possible to design the half-shells as equal parts. The cost of producing the crosstalk is thereby considerably 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 stark vereinfachte Prinzipdarstellung einer Abgasanlage,
Fig. 2
eine perspektivische Ansicht eines Übersprechers,
Fig. 3
eine Seitenansicht des Übersprechers entsprechend Blickrichtung III in Fig. 2,
Fig. 4
eine Vorderansicht oder Rückansicht des Übersprechers entsprechend Blickrichtung IV in Fig. 2,
Fig. 5
eine Schnittansicht des Übersprechers entsprechend Schnittlinien A-A in Fig. 4,
Fig. 6
eine Schnittansicht des Übersprechers entsprechend Schnittlinien B-B in Fig. 4,
Fig. 7
eine Draufsicht des Übersprechers entsprechend Blickrichtung VII in Fig. 2,
Fig. 8
eine Schnittansicht des Übersprechers entsprechend Schnittlinien C-C in Fig. 7.
Show, in each case schematically,
Fig. 1
a simplified schematic representation of an exhaust system,
Fig. 2
a perspective view of a crosstalk,
Fig. 3
a side view of the crosstalk according to viewing direction III in Fig. 2 .
Fig. 4
a front view or rear view of the crosstalk according to viewing direction IV in Fig. 2 .
Fig. 5
a sectional view of the crosstalk according to section lines AA in Fig. 4 .
Fig. 6
a sectional view of the crosstalk according to section lines BB in Fig. 4 .
Fig. 7
a top view of the crosstalk according to viewing direction VII in Fig. 2 .
Fig. 8
a sectional view of the crosstalk according to section lines CC in Fig. 7 ,

Entsprechend Fig. 1 weist eine zweiflutige Abgasanlage 1 zwei Abgasstränge, nämlich einen ersten Abgasstrang 2 und einen zweiten Abgasstrang 3 auf. Die Abgasanlage 1 dient zum Abführen von Abgasen einer Brennkraftmaschine 4. Hierzu sind die beiden Abgasstränge 2, 3 an die Brennkraftmaschine 4 angeschlossen und sind im Betrieb der Brennkraftmaschine 4 von deren Abgas parallel durchströmbar. Die Abgasstränge 2, 3 können in üblicher Weise, hier nicht gezeigte Einrichtungen zur Abgasreinigung, wie z.B. Katalysator und Partikelfilter, sowie zur Schalldämpfung enthalten. Vorzugsweise ist die Brennkraftmaschine 4 zusammen mit ihrer Abgasanlage 1 in einem Kraftfahrzeug angeordnet.Corresponding Fig. 1 For example, a dual-flow exhaust system 1 has two exhaust gas lines, namely a first exhaust line 2 and a second exhaust line 3. The exhaust system 1 is used for discharging exhaust gases of an internal combustion engine 4. For this purpose, the two exhaust gas lines 2, 3 are connected to the internal combustion engine 4 and are in parallel through which the exhaust gas in the operation of the internal combustion engine 4. The exhaust gas strands 2, 3 can in the usual way, not shown here facilities for exhaust gas purification, such as catalyst and particulate filter, and to contain soundproofing. Preferably, the Internal combustion engine 4 is arranged together with its exhaust system 1 in a motor vehicle.

Die Abgasanlage 1 weist außerdem einen Übersprecher 5 auf, der dazu dient, die beiden Abgasstränge 2, 3 fluidisch und/oder akustisch miteinander zu koppeln. Die akustische Kopplung bewirkt, dass Luftschall, der im Betrieb der Brennkraftmaschine 4 in den Abgassträngen 2, 3 transportiert wird, über den Übersprecher 5 vom ersten Abgasstrang 2 in den zweiten Abgasstrang 3 gelangt und umgekehrt. Die fluidische Kopplung bewirkt, dass Abgas, das im Betrieb der Brennkraftmaschine 4 durch die Abgasstränge 2, 3 abgeführt wird, über den Übersprecher vom ersten Abgasstrang 2 grundsätzlich in den zweiten Abgasstrang gelangen kann und umgekehrt. Der Übersprecher 5 dient dabei im wesentlichen zur akustischen Beeinflussung der Abgasanlage 1.The exhaust system 1 also has a crosstalk 5, which serves to couple the two exhaust gas lines 2, 3 fluidly and / or acoustically with each other. The acoustic coupling causes airborne sound that is transported in the operation of the internal combustion engine 4 in the exhaust gas lines 2, 3, via the crosstip 5 from the first exhaust line 2 into the second exhaust line 3 passes and vice versa. The fluidic coupling causes exhaust gas, which is discharged during operation of the internal combustion engine 4 through the exhaust gas lines 2, 3, via the crosstalk from the first exhaust line 2 can basically get into the second exhaust line and vice versa. The crosstalk 5 essentially serves to acoustically influence the exhaust system 1.

Der Übersprecher 5 besitzt ein Gehäuse 6, das zwei Einlässe, nämlich einen ersten Einlass 7 und einen zweiten Einlass 8, sowie zwei Auslässe, nämlich einen ersten Auslass 9 und einen zweiten Auslass 10, aufweist. In dem in Fig. 1 gezeigten Einbauzustand ist der erste Abgasstrang 2 über den ersten Einlass 7 und den ersten Auslass 9 an den Übersprecher 5 angeschlossen, während der zweite Abgasstrang 3 über den zweiten Einlass 8 und den zweiten Auslass 10 an den Übersprecher 5 angeschlossen ist.The crosstalk 5 has a housing 6 which has two inlets, namely a first inlet 7 and a second inlet 8, and two outlets, namely a first outlet 9 and a second outlet 10. In the in Fig. 1 shown installation state, the first exhaust line 2 is connected via the first inlet 7 and the first outlet 9 to the crosstalk 5, while the second exhaust line 3 is connected via the second inlet 8 and the second outlet 10 to the crosstalk 5.

Das Gehäuse 6 besitzt einen Innenraum 11, über den die Einlässe 7, 8 und die Auslässe 9, 10 miteinander fluidisch kommunizieren. Über diesen Innenraum 11 erfolgt somit die fluidische und/oder akustische Kopplung der beiden Abgasstränge 2, 3. Besagte Kopplung ist in Fig. 1 durch einen Doppelpfeil symbolisiert und mit 12 bezeichnet.The housing 6 has an inner space 11, via which the inlets 7, 8 and the outlets 9, 10 communicate fluidly with each other. The fluidic and / or acoustic coupling of the two exhaust gas strands 2, 3 takes place via this inner space 11. Said coupling is in Fig. 1 symbolized by a double arrow and designated 12.

Im Betrieb der Brennkraftmaschine 4 durchströmen die Abgase den Übersprecher 5 in einer Hauptdurchströmungsrichtung 13, die in den Figuren durch Pfeile symbolisiert ist. Diese Hauptdurchströmungsrichtung 13 führt dabei vom jeweiligen Einlass 7, 8 zu dem demselben Abgasstrang 2, 3 zugeordneten Auslass 9 bzw. 10. Die Hauptdurchströmungsrichtung 13 des Übersprechers 5 entspricht somit der Hauptströmungsrichtung des Abgases innerhalb des jeweiligen Abgasstrangs 2, 3 im Bereich des Übersprechers 5, also beim Passieren des Übersprechers 5.During operation of the internal combustion engine 4, the exhaust gases flow through the crosstalk 5 in a main flow direction 13, which is symbolized by arrows in the figures. The main flow direction 13 of the crosstalk 5 thus corresponds to the main flow direction of the exhaust gas within the respective exhaust line 2, 3 in the region of the crosstalk 5, So when passing the crosstalk 5.

Die konstruktiven Details des Übersprechers 5 werden im folgenden anhand der Fig. 2 bis 8 näher erläutert.The structural details of the crosstalk 5 are described below with reference to Fig. 2 to 8 explained in more detail.

Entsprechend den Fig. 2 bis 8 ist das Gehäuse 6 aus zwei Halbschalen, nämlich aus einer ersten Halbschale 14 und einer zweiten Halbschale 15, zusammengebaut. Dabei besitzen die beiden Halbschalen 14, 15 eine Trennebene 16, die sich quer zur Hauptdurchströmungsrichtung 13 des Übersprechers 5 erstreckt. Aufgrund dieser Ausgestaltung der Halbschalen 14, 15 weist die erste Halbschale 14 die beiden Einlässe 7, 8 auf. Im Unterschied dazu weist die zweite Halbschale 15 beide Auslässe 9, 10 auf. Die Trennebene 16 erstreckt sich somit zwischen den Einlässen 7, 8 die sich einerseits der Trennebene 16 befinden, und den Auslässen 9, 10, die sich andererseits der Trennebene 16 befinden. Gleichzeitig erstreckt sich die Trennebene 16 durch den Innenraum 11.According to the Fig. 2 to 8 is the housing 6 of two half-shells, namely a first half-shell 14 and a second half-shell 15, assembled. In this case, the two half shells 14, 15 have a parting plane 16, which extends transversely to the main flow direction 13 of the crosstalk 5. Due to this embodiment of the half-shells 14, 15, the first half-shell 14, the two inlets 7, 8. In contrast, the second half-shell 15 has both outlets 9, 10. The parting plane 16 thus extends between the inlets 7, 8 which on the one hand the Parting plane 16 are located, and the outlets 9, 10, on the other hand, the parting plane 16 are located. At the same time, the parting plane 16 extends through the inner space 11.

Bei der hier gezeigten, bevorzugten Ausführungsform sind die beiden Halbschalen 14, 15 so ausgestaltet, dass sie im gezeigten montierten Zustand ineinander gesteckt sind, und zwar in der Hauptdurchströmungsrichtung 13 des Übersprechers 5. Hierdurch kommt es zu einer gegenseitigen Überlappung von Steckbereichen, nämlich eines ersten Steckbereichs 17 der ersten Halbschale 14 und eines zweiten Steckbereichs 18 der zweiten Halbschale 15. In dem durch die ineinander gesteckten Steckbereiche 17, 18 gebildeten Überlappungsbereich kommt es innerhalb des Gehäuses 6 zu einer Materialdopplung, die zu einer intensiven Aussteifung des Gehäuses 6 in diesem Gehäusebereich führt. Die Trennebene 16 erstreckt sich genau in diesem Überlappungsbereich, also durch die Steckbereiche 17, 18.In the preferred embodiment shown here, the two half-shells 14, 15 are designed so that they are inserted into one another in the mounted state shown, in the main flow direction 13 of the crosstalk 5. This results in a mutual overlap of mating areas, namely a first Plug-in area 17 of the first half-shell 14 and a second plug-in area 18 of the second half-shell 15. In the overlapping area formed by the mating plug-in areas 17, 18 occurs within the housing 6 to a material doubling, which leads to an intensive stiffening of the housing 6 in this housing area , The parting plane 16 extends precisely in this overlapping region, that is to say through the plug-in regions 17, 18.

Bei den hier gezeigten, bevorzugten Ausführungsformen sind die Steckbereiche 17, 18 bezüglich einer Teilungsebene 19 asymmetrisch ausgestaltet. Diese Teilungsebene 19 erstreckt sich dabei senkrecht zur Trennebene 16. Entlang der Teilungsebene 19 ist jeder Steckbereich 17, 18 in einem einerseits der Teilungsebene 19 angeordneten inneren Steckteilbereich 17i bzw. 18i und einen andererseits der Teilungsebene 19 angeordneten äußeren Steckteilbereich 17a bzw. 18a unterteilt. Im montierten Zustand ist somit auf der einen Seite der Teilungsebene 19 der äußere Steckteilbereich 17a der ersten Halbschale 14 außen auf den inneren Steckteilbereich 18i der zweiten Halbschale 15 aufgesteckt, während auf der anderen Seite der Teilungsebene 19 der innere Steckteilbereich 17i der ersten Halbschale 14 innen in den äußeren Steckteilbereich 18a der zweiten Halbschale 15 eingesteckt ist. Bei dieser Ausführungsform sind die beiden Halbschalen 14, 15 im Bereich ihrer Trennebene 16 halb auf die jeweils andere Halbschale 14, 15 aufgesteckt und halb in die jeweils andere Halbschale 14, 15 eingesteckt. Die hier gezeigte Ausführungsform hat den Vorteil, dass die beiden Halbschalen 14, 15 als Gleichteile ausgestaltet werden können. Gleichteile erhöhen die Stückzahl und reduzieren den Stückpreis, so dass der Übersprecher 5 durch diese Maßnahme besonders preiswert herstellbar ist.In the preferred embodiments shown here, the plug-in regions 17, 18 are designed asymmetrically with respect to a graduation plane 19. This dividing plane 19 extends perpendicular to the dividing plane 16. Along the dividing plane 19, each plug-in area 17, 18 is divided into an outer plug-in portion 17a or 18a arranged on the one hand of the dividing plane 19, and an outer plug-in portion 17a or 18a arranged on the other hand. In the assembled state is thus on the one side of the dividing plane 19 of the outer male portion 17 a of the first half-shell 14 is externally fitted onto the inner plug-in portion 18i of the second half-shell 15, while on the other side of the dividing plane 19, the inner plug-in portion 17i of the first half-shell 14 is inserted inside the outer plug portion 18a of the second half-shell 15. In this embodiment, the two half-shells 14, 15 in the region of their parting plane 16 half attached to the other half shell 14, 15 and half in the other half shell 14, 15 inserted. The embodiment shown here has the advantage that the two half-shells 14, 15 can be configured as identical parts. Similar parts increase the number of pieces and reduce the unit price, so that the crosstalk 5 can be produced particularly inexpensively by this measure.

Vorzugsweise erstreckt sich die Teilungsebene 19 wie bei den hier gezeigten Ausführungsformen, also so, dass sie sich durch beide Einlässe 7, 8 und durch beide Auslässe 9, 10 erstreckt. Bei dieser Ausrichtung der Teilungsebene 19 können Kräfte, die über die Abgasstränge 2, 3 auf den Übersprecher 5 eingeleitet werden, besonders günstig über den versteiften Überlappungsbereich übertragen werden. Ebenso ist es grundsätzlich möglich, die Teilungsebene 19 so anzuordnen, dass sich der erste Einlass 7 und der erste Auslass 9, die beide dem ersten Abgasstrang 2 zugeordnet sind, einerseits der Teilungsebene 19 befinden und dass sich der zweite Einlass 8 und der zweite Auslass 10, die beide dem zweiten Abgasstrang 3 zugeordnet sind, andererseits der Teilungsebene 19 befinden.Preferably, the dividing plane 19 extends as in the embodiments shown here, so that it extends through both inlets 7, 8 and through both outlets 9, 10. In this orientation of the division plane 19, forces which are introduced via the exhaust gas strands 2, 3 to the crosstalk 5 can be transmitted in a particularly favorable manner via the stiffened overlap region. Likewise, it is basically possible to arrange the dividing plane 19 such that the first inlet 7 and the first outlet 9, which are both assigned to the first exhaust gas line 2, are located on the one hand the dividing plane 19 and the second inlet 8 and the second outlet 10 , which are both associated with the second exhaust line 3, on the other hand, the division plane 19 are located.

Vorzugsweise sind die beiden Halbschalen 14, 15 im montierten Zustand des Übersprechers 5 durch eine einzige, geschlossen umlaufende Schweißnaht 20 aneinander befestigt. Die Schweißnaht 20 ist exemplarisch nur in den Schnittdarstellungen der Fig. 5, 6 und 8 angedeutet. Die Schweißnaht 20 erstreckt sich somit randseitig entlang der äußeren Steckteilbereiche 17a und 18a und verschließt dabei Schlitze 21, die erforderlich sind, um die geteilten Steckbereiche 17, 18 auszubilden und wechselseitig ineinander stecken zu können. Durch die geschlossen umlaufende Schweißnaht 20 ist das Gehäuse 6 hinreichend dicht.Preferably, the two half shells 14, 15 in the assembled state of the crosstalk 5 by a single, closed circumferential weld 20 are fastened together. The weld 20 is exemplary only in the sectional views of Fig. 5, 6 and 8th indicated. The weld seam 20 thus extends along the edge of the outer plug-in part regions 17a and 18a, thereby closing slots 21 which are required to form the split plug-in regions 17, 18 and to be mutually interlocked. Due to the closed circumferential weld 20, the housing 6 is sufficiently tight.

Um die Einbindung des Übersprechers 5 in die Abgasstränge 2, 3 zu vereinfachen sind vorzugsweise beide Einlässe 7, 8 jeweils als Einlassstutzen und die beiden Auslässe 9, 10 jeweils als Auslassstutzen ausgestaltet. Dementsprechend sind bei der hier gezeigten bevorzugten Ausführungsform ein erster Einlassstutzen 22, ein zweiter Einlassstutzen 23, ein erster Auslassstutzen 24 und ein zweiter Auslassstutzen 25 vorgesehen. Die Dimensionierung der Stutzen 22 bis 25 ist auf die Abgasstränge 2, 3 so abgestimmt, dass der jeweilige Abgasstrang 2, 3 entweder in den jeweiligen Stutzen 22 bis 25 einsteckbar oder auf den jeweiligen Stutzen 22 bis 25 aufsteckbar ist. Zur Befestigung der Abgasstränge 2, 3 am Übersprecher 5 kann im Bereich jedes Stutzens 22 bis 25 jeweils eine geschlossen umlaufende Schweißnaht vorgesehen sein. Da die Einlässe 7, 8 und somit die Einlassstutzen 22, 23 ebenso wie die Auslässe 9, 10 und deren Auslassstutzen 24, 25 außerhalb der Trennebene 16 angeordnet sind, können die Schweißnähte zum Anbinden der Abgasstränge 2, 3 unterbrechungsfrei ausgeführt werden, wodurch diese im Betrieb reduzierten Spannungen ausgesetzt sind und eine erhöhte Dauerhaltbarkeit aufweisen.In order to simplify the integration of the crosstalk 5 in the exhaust gas lines 2, 3 are preferably both inlets 7, 8 each configured as an inlet port and the two outlets 9, 10 each as an outlet. Accordingly, in the preferred embodiment shown here, a first inlet port 22, a second inlet port 23, a first outlet port 24 and a second outlet port 25 are provided. The dimensioning of the nozzle 22 to 25 is tuned to the exhaust lines 2, 3 so that the respective exhaust line 2, 3 either in the respective nozzle 22 to 25 can be inserted or plugged onto the respective nozzle 22 to 25. In order to fasten the exhaust gas strands 2, 3 to the crosstalk 5, in each case a closed circumferential weld seam can be provided in the region of each connecting piece 22 to 25. Since the inlets 7, 8 and thus the inlet nozzle 22, 23 as well as the outlets 9, 10 and the outlet nozzle 24, 25 are arranged outside the parting plane 16, the welds for connecting the exhaust gas lines 2, 3 can be performed without interruption, whereby these are exposed in operation reduced voltages and have an increased durability.

Die hier gezeigte, kompakt bauende Ausführungsform zeichnet sich außerdem dadurch aus, dass beide Einlässe 7, 8 in einer gemeinsamen, nicht näher bezeichneten Einlassebene liegen, die insbesondere parallel zur Trennebene 16 verläuft. Darüber hinaus liegen bei der hier gezeigten Ausführungsform die beiden Auslässe 9, 10 in einer gemeinsamen, nicht näher bezeichneten Auslassebene, die vorzugsweise parallel zur Trennebene 16 verläuft. Des weiteren sind der erste Einlass 7 und der erste Auslass 9, die beide dem ersten Abgasstrang 2 zugeordnet sind, zueinander koaxial angeordnet, so dass das zusammengehörende Paar aus erstem Einlass 7 und erstem Auslass 9 zueinander fluchten. Entsprechendes gilt bei der hier gezeigten Ausführungsform auch für das andere zusammengehörende Paar aus zweitem Einlass 8 und zweitem Auslass 10.The compact design embodiment shown here is also distinguished by the fact that both inlets 7, 8 lie in a common inlet level, which is not designated in more detail, and runs in particular parallel to the parting plane 16. In addition, in the embodiment shown here, the two outlets 9, 10 in a common, unspecified outlet level, which is preferably parallel to the parting plane 16. Furthermore, the first inlet 7 and the first outlet 9, which are both associated with the first exhaust line 2, arranged coaxially with each other, so that the matching pair of first inlet 7 and first outlet 9 are aligned with each other. The same applies in the embodiment shown here for the other pair of associated second inlet 8 and second outlet 10th

Der Übersprecher 5 ermöglicht über seinen Innenraum 11 die akustische sowie die fluidische, hier pneumatische, Kopplung zwischen den beiden Abgassträngen 2, 3, wenn der Übersprecher 5 in die Abgasanlage 1 eingebaut ist. Darüber hinaus sind die beiden Abgasstränge 2, 3 über den Übersprecher 5 mechanisch fest miteinander verbunden. Die durch den Übersprecher 5 realisierte mechanische Verbindung zwischen den beiden Abgassträngen 2, 3 ist im Betrieb der Abgasanlage 1 hohen Belastungen ausgesetzt. Der hier gezeigte Aufbau des Übersprechers 5 ermöglicht eine günstige Spannungsverteilung, da die Richtungen, in denen die auftretenden Kräfte zwischen den beiden Abgassträngen 2, 3 hauptsächlich Übertragen werden, im wesentlichen in der Trennebene 16 liegen. Gleichzeitig zeichnet sich der Übersprecher 5 aufgrund seiner Bauweise im Bereich seiner Trennebene 16 durch eine besonders hohe Steifigkeit aus. Dementsprechend besitzt der Übersprecher 5 im Hinblick auf die auftretenden Belastungen eine relativ hohe Haltbarkeit.The crosstalk 5 allows through its interior 11, the acoustic and the fluidic, here pneumatic, coupling between the two exhaust lines 2, 3, when the crosstalk 5 is installed in the exhaust system 1. In addition, the two exhaust gas lines 2, 3 are mechanically connected to each other via the crosstip 5. The mechanical connection between the two exhaust gas lines 2, 3 realized by the crosstalk 5 is in the operation of the exhaust system 1 exposed to high loads. The structure shown here of the crosstalk 5 allows a favorable stress distribution, since the directions in which the forces occurring between the two exhaust gas lines 2, 3 are mainly transmitted, lie substantially in the parting plane 16. At the same time, the crosstalk 5 is characterized by a particularly high rigidity due to its design in the region of its parting plane 16. Accordingly, the crosstalk 5 has a relatively high durability in view of the loads occurring.

Claims (11)

  1. A crosstalk device for fluidic and/or acoustic coupling of two exhaust lines (2, 3) through which the exhaust gas flows in parallel, belonging to an exhaust system (1) of an internal combustion engine (4), in particular in a motor vehicle,
    - with a housing (6) having two inlets (7, 8) and two outlets (9, 10) which are interconnected so they communicate via an interior (11) of the housing (6) and by which the two exhaust lines (2, 3) can be connected to the crosstalk device (5),
    - whereby the housing (6) is assembled from two half-shells (14, 15) whose parting plane (16) extends across the main direction of flow (13) of the crosstalk device (5).
  2. The crosstalk device according to Claim 1,
    characterized in that
    the one half-shell (14) has the two inlets (7, 8) while the other half-shell (15) has the two outlets (9, 10).
  3. The crosstalk device according to Claim 1 or 2,
    characterized in that
    the parting plane (16) extends through the interior (11).
  4. The crosstalk device according to any one of Claims 1 through 3,
    characterized in that
    the two half-shells (14, 15) in the main direction of flow (13) of the crosstalk device (5) are inserted one inside the other and plug-in areas (17, 18) of the two half-shells (14, 15) mutually overlap.
  5. The crosstalk device according to Claim 4,
    characterized in that
    the plug-in areas (17, 18) of the two half-shells (14, 15) are designed to be asymmetrical with regard to a dividing plane (19) running perpendicular to the parting plane (16) such that an outer plug part area (17a) of the one half-shell (14) arranged on one side of the dividing plane (19) is attached on the outside to an inner plug part area (18i) of the other half-shell (15), while an inner plug-in area (17i) of the one half-shell (14) arranged on the other side of the dividing plane (19) is inserted on the inside into an outer plug part area (18a) of the other half-shell (15).
  6. The crosstalk device according to Claim 5,
    characterized in that
    - the dividing plane (19) extends between the inlet (7) and the outlet (9), which are assigned to the one exhaust line (2), and the inlet (8) and the outlet (10), which are assigned to the other exhaust line (3), or
    - the dividing plane (19) extends through both inlets (7, 8) and through both outlets (9, 10).
  7. The crosstalk device according to any one of Claims 1 through 6,
    characterized in that
    the two half-shells (14, 15) are designed as identical parts.
  8. The crosstalk device according to any one of Claims 1 through 7,
    characterized in that
    the two half-shells (14, 15) are attached to one another by a closed peripheral weld (20).
  9. The crosstalk device according to any one of Claims 1 through 8,
    characterized in that
    - the one and/or the other inlet (7, 8) is designed as an inlet connection (22, 23) into which the respective exhaust line (2, 3) can be inserted or onto which the respective exhaust line (2, 3) can be attached, and/or
    - the one and/or the other outlet (9, 10) is designed as an outlet connection (24, 25) into which the respective exhaust line (2, 3) can be inserted or onto which the respective exhaust line (2, 3) can be attached.
  10. The crosstalk device according to any one of Claims 1 through 9,
    characterized in that
    - the two inlets (7, 8) lie in a shared inlet plane, and/or
    - the inlet plane runs parallel to the parting plane (16), and/or
    - the two outlets (9, 10) lie in a shared outlet plane, and/or
    - the outlet plane runs parallel to the parting plane (16), and/or
    - at least one of the inlets (7, 8) and the outlet (9, 10) assigned to the same exhaust line (2, 3) are arranged so they are flush with one another and/or coaxial with one another.
  11. The exhaust system for an internal combustion engine (4), in particular in a motor vehicle, having two parallel exhaust lines (2, 3) through which exhaust gas can flow and which are fluidically and/or acoustically linked together by means of a crosstalk device (5) according to any one of Claims 1 through 10.
EP06122634A 2005-11-16 2006-10-20 Intermediate cross connection for an exhaust system Active EP1788216B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005055046A DE102005055046A1 (en) 2005-11-16 2005-11-16 Crosstalk for an exhaust system

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EP1788216A1 EP1788216A1 (en) 2007-05-23
EP1788216B1 true EP1788216B1 (en) 2008-08-27

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DE502006001434D1 (en) 2008-10-09
EP1788216A1 (en) 2007-05-23
US7866709B2 (en) 2011-01-11
US20070107707A1 (en) 2007-05-17
DE102005055046A1 (en) 2007-05-24

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