EP3828397A1 - Connecting unit - Google Patents

Connecting unit Download PDF

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Publication number
EP3828397A1
EP3828397A1 EP20203189.4A EP20203189A EP3828397A1 EP 3828397 A1 EP3828397 A1 EP 3828397A1 EP 20203189 A EP20203189 A EP 20203189A EP 3828397 A1 EP3828397 A1 EP 3828397A1
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EP
European Patent Office
Prior art keywords
connecting element
connection
opening
pipe
counter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20203189.4A
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German (de)
French (fr)
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EP3828397B1 (en
Inventor
Benjamin Röhr
Elke Preisser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eberspaecher Exhaust Technology GmbH and Co KG
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Eberspaecher Exhaust Technology GmbH and Co KG
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Publication of EP3828397A1 publication Critical patent/EP3828397A1/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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F01N13/1855—Mechanical joints the connection being realised by using bolts, screws, rivets or the like
    • 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
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • 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
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/20—Methods or apparatus for fitting, inserting or repairing different elements by mechanical joints, e.g. by deforming housing, tube, baffle plate or parts thereof
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing

Definitions

  • connection unit for connecting two exhaust-gas-carrying assemblies of an exhaust system of an internal combustion engine, comprising an annular disk-like connection element with a connection side to be positioned facing a mating connection element to be connected to the connection element and / or to be positioned adjacent to it, and a passage opening delimited by an inner circumferential surface of the connection element as well as a connecting pipe which is inserted into the access opening and extends in the direction of a pipe longitudinal axis.
  • connection units are used in exhaust systems of internal combustion engines in vehicles in order to establish a fixed and essentially exhaust-gas-tight connection between various exhaust-gas-carrying assemblies.
  • connection units are produced in the transition area between a so-called "hotend”, ie an area of an exhaust system carrying very hot exhaust gases near an internal combustion engine, and a "coldend”, ie an area of an exhaust system carrying already somewhat cooled exhaust gases.
  • connection unit for connecting two exhaust-gas-carrying assemblies of an exhaust system of an internal combustion engine which, while being easy to assemble, meets the requirements for exhaust gas tightness.
  • the connecting unit according to the invention is characterized in that the connecting tube is connected to the connecting element in the area of the inner circumferential surface by welding, and / or that the connecting tube protrudes with a centering section on the connecting side of the connecting element.
  • connection unit Various advantageous aspects are implemented in this connection unit.
  • the connection of the connecting element to the connecting tube in the area of the inner circumferential surface of the connecting tube ensures that deformations, in particular of the connecting element, can be largely avoided when the welded connection is made. This achieves very good gas tightness when a connection is created between the connecting element and a counter-connecting element.
  • the aspect of providing a centering section on the connection unit facilitates the assembly of an exhaust system through the centering function introduced by means of this centering section with respect to a counter-connecting element.
  • the connecting pipe has at least one weld opening that completely penetrates a pipe wall of the connecting pipe in its length region axially overlapped by the inner circumferential surface, and that the connecting pipe is provided with one weld opening in the at least a weld opening formed weld is connected to the connecting element.
  • the connecting tube can have a plurality of weld openings following one another in the circumferential direction around the longitudinal axis of the tube.
  • each welding opening is elongated in the circumferential direction around the longitudinal axis of the pipe.
  • a circumferential distance between welding openings that follow one another in the circumferential direction around the longitudinal axis of the pipe is in the range of 2 mm to 6 mm, and / or if an axial width of at least one, preferably each welding opening is in the range of 2 mm to 3 mm.
  • connection assembly for connecting two exhaust-gas-carrying assemblies of an exhaust system of an internal combustion engine, comprising a connection unit with the structure according to the invention described above and an annular disk-like counter-connection element with a counter connection side facing the connection element of the connection unit or / and to be positioned adjacent thereto, wherein a centering opening corresponding to the penetration opening is provided in the counter-connecting element.
  • the connecting assembly can comprise at least one connecting element for firmly connecting the connecting element to the counter-connecting element.
  • the at least one connecting element have a Comprises connecting element and / or the counter-connecting element penetrating connecting bolts.
  • the centering function can be provided particularly efficiently in that, when the counter-connecting element is connected to the connecting element, the access opening and the centering opening are essentially congruent with one another.
  • congruent means that the two openings are provided or arranged with the same opening cross-sectional geometry, the same opening cross-sectional size and the same radial positioning with respect to the longitudinal axis of the pipe.
  • the centering section of the connecting pipe can engage in the centering opening.
  • the invention also relates to an exhaust system, comprising a connection assembly constructed according to the invention, a first exhaust-gas-carrying assembly being connected to the connecting pipe and a second exhaust-gas-carrying assembly being connected to the counter-connecting element.
  • Fig. 1 a section of an exhaust system, generally designated 10, for an internal combustion engine of a vehicle can be seen.
  • a so-called “hotend” 12 shows the transition between a so-called “hotend” 12 and a so-called “coldend” 14 of the exhaust system 10.
  • two, for example, tubular exhaust-gas-carrying assemblies 16, 18 of the exhaust system 10 are connected to one another by a connection assembly 20.
  • connection assembly 20 comprises a connection unit 22 that is preferably connected to the “hot end” 12, i.e. the tube-like assembly 16, and an annular disk-like connection unit 22 connected to the connection unit 22 in the manner described below and connected to the “cold end” 14 or assembly 18 Counter-connecting element 24.
  • the connecting unit 22 comprises a connecting element 26 to be connected to the counter-connecting element 24.
  • This connecting element is also designed in the manner of an annular disk and has a through-opening 28, for example, of circular shape.
  • a preferably essentially cylindrical connecting pipe 30 extending in the direction of a pipe longitudinal axis L is inserted into the through opening 28.
  • the connecting pipe 30 with an outer diameter of its pipe wall 32 is matched to the inner diameter of the access opening 28 in such a way that when the connecting pipe 30 is inserted into the access opening 28, it is received in the access opening 28 essentially without play.
  • the connecting pipe 30 in the example shown has a plurality of preferably slot-like weld openings 38 that follow one another in the circumferential direction about the longitudinal axis L.
  • These welding openings 38 penetrate the pipe wall 32 of the connecting pipe 30, so that in principle in the area of the welding openings 38 when the connecting pipe 30 is inserted into the penetration opening 28, the inner circumferential surface 36 is exposed inward, i.e. not covered.
  • a weld 37 is formed in the area of each of the weld openings 38, which preferably essentially completely fills them and thus creates a material-locking connection between the connecting tube 30 and the connecting element 26.
  • These welds 37 with respect to the inner circumferential surface 36 of the connecting element 26 ensure an almost completely continuous and thus essentially gas-tight material connection of the connecting element 26 to the connecting pipe 30 in the circumferential direction.
  • the welds 37 formed in the weld openings 38 can be guided over the webs 39 in the circumferential direction in order to achieve a gas-tight connection between the connecting pipe 30 and the connecting element 26 to form welds 41 there too.
  • the welds 41 made in the area of these webs 39 along the inner circumferential surface of the connecting tube 30 also lead to a material bond between the connecting tube 30 on its outer circumferential surface 34 and the connecting element 26 on its inner circumferential surface 36 due to the heat input that occurs when these welds are produced
  • the webs 41 have a length of approximately 2 mm to 6 mm in the circumferential direction.
  • the welding openings 38 have an axial width, that is to say an extension in the direction of the pipe longitudinal axis L, in the range from 2 mm to 3 mm.
  • the connecting pipe 30 protrudes with a centering section 40 on a connecting side 42 of the connecting element 26 to be positioned facing the mating connecting element 24 over the connecting element 26.
  • a centering opening 44 is formed in the counter-connecting element 24 in correspondence with the penetration opening 28 of the connecting element 26.
  • the connecting pipe 30 engages with its centering section 40 in the centering opening 44 that the outer circumferential surface 34 of the connecting pipe 30 is in the area of the centering section 40 can rest against an inner circumferential surface 48 of the counter-connecting element 24 which delimits the centering opening 44, so that a substantially gas-tight connection between the connecting tube 30 and the counter-connecting element 24 is also created in this area.
  • connecting members 50 preferably designed as screw bolts. These can, for example, pass through connecting bolt openings 52 provided in the connecting element 26 and can also pass through connecting bolt openings 52 provided in the counter-connecting element 24, so that a firm cohesion can be established at the ends protruding beyond the counter-connecting element 24, for example by applying nuts or the like.
  • the connecting element openings 54 in the counter-connecting element 24 can be designed as internally threaded openings into which the connecting elements 50 can be screwed in order to establish a fixed connection.
  • the connecting elements 50 press the connecting element 26 with its connecting side 42 or a substantially planar surface provided there against the counter-connecting side 46 or a surface of the counter-connecting element 24 provided there, so that in this area too an in Essential gas-tight connection is achieved.
  • This can be supported by positioning a sealing element between the connection side 42 and the opposite connection side 46. Since the connection of the connecting pipe 30 to the connecting element 26 involves welding in the area of the inner circumferential surface 36 of the connecting element 26, deformation of the connecting element 26 indicated by the heating occurring during welding is practically excluded. This ensures that this is also provided with high precision in the area of its connection side 42 and thus a gas-tight connection can be ensured in contact interaction with the counter-connecting element 24.

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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)

Abstract

Eine Verbindungseinheit zum Verbinden zweier abgasführender Baugruppen einer Abgasanlage einer Brennkraftmaschine, umfassend ein ringscheibenartiges Verbindungselement (26) mit einer einem mit dem Verbindungselement (26) zu verbindenden Gegen-Verbindungselement (24) zugewandt oder/und an diesem anliegend zu positionierenden Verbindungsseite (42) und einer von einer Innenumfangsfläche (36) des Verbindungselements (26) umgrenzten Durchgriffsöffnung (28) sowie ein in die Durchgriffsöffnung (28) eingesetztes, in Richtung einer Rohrlängsachse (L) sich erstreckendes Verbindungsrohr (30), ist dadurch gekennzeichnet, dass das Verbindungsrohr (30) mit dem Verbindungselement (26) im Bereich der Innenumfangsfläche (36) durch Verschweißung verbunden ist, oder/und dass das Verbindungsrohr (30) mit einem Zentrierabschnitt (40) an der Verbindungsseite (42) des Verbindungselements (26) übersteht.

Figure imgaf001
A connecting unit for connecting two exhaust-gas-carrying assemblies of an exhaust system of an internal combustion engine, comprising an annular disk-like connecting element (26) with a connecting side (42) facing or / and resting against a mating connecting element (24) to be connected to the connecting element (26) and a through-opening (28) delimited by an inner circumferential surface (36) of the connecting element (26) and a connecting tube (30) inserted into the through-opening (28) and extending in the direction of a tube longitudinal axis (L), is characterized in that the connecting tube (30 ) is connected to the connecting element (26) in the area of the inner circumferential surface (36) by welding, and / or that the connecting tube (30) protrudes with a centering section (40) on the connecting side (42) of the connecting element (26).
Figure imgaf001

Description

Die vorliegende Erfindung betrifft eine Verbindungseinheit zum Verbinden zweier abgasführender Baugruppen einer Abgasanlage einer Brennkraftmaschine, umfassend ein ringscheibenartiges Verbindungselement mit einer einem mit dem Verbindungselement zu verbindenden Gegen-Verbindungselement zugewandt oder/und an diesem anliegend zu positionierenden Verbindungsseite und einer von einer Innenumfangsfläche des Verbindungselements umgrenzten Durchgriffsöffnung sowie ein in die Durchgriffsöffnung eingesetztes, in Richtung einer Rohrlängsachse sich erstreckendes Verbindungsrohr.The present invention relates to a connection unit for connecting two exhaust-gas-carrying assemblies of an exhaust system of an internal combustion engine, comprising an annular disk-like connection element with a connection side to be positioned facing a mating connection element to be connected to the connection element and / or to be positioned adjacent to it, and a passage opening delimited by an inner circumferential surface of the connection element as well as a connecting pipe which is inserted into the access opening and extends in the direction of a pipe longitudinal axis.

In Abgasanlagen von Brennkraftmaschinen in Fahrzeugen werden derartige Verbindungseinheiten eingesetzt, um eine feste und im Wesentlichen abgasdichte Verbindung zwischen verschiedenen abgasführenden Baugruppen herzustellen. Insbesondere werden derartige Verbindungseinheiten im Übergangsbereich zwischen einem sogenannten "Hotend", also einem nahe einer Brennkraftmaschine sehr heiße Abgase führenden Bereich einer Abgasanlage, und einem "Coldend", also einem bereits etwas abgekühlte Abgase führenden Bereich einer Abgasanlage, herzustellen.Such connection units are used in exhaust systems of internal combustion engines in vehicles in order to establish a fixed and essentially exhaust-gas-tight connection between various exhaust-gas-carrying assemblies. In particular, such connection units are produced in the transition area between a so-called "hotend", ie an area of an exhaust system carrying very hot exhaust gases near an internal combustion engine, and a "coldend", ie an area of an exhaust system carrying already somewhat cooled exhaust gases.

Es ist die Aufgabe der vorliegenden Erfindung, eine Verbindungseinheit zum Verbinden zweier abgasführender Baugruppen einer Abgasanlage einer Brennkraftmaschine vorzusehen, welche bei einfacher Montierbarkeit die Anforderungen an die Abgasdichtigkeit erfüllt.It is the object of the present invention to provide a connection unit for connecting two exhaust-gas-carrying assemblies of an exhaust system of an internal combustion engine which, while being easy to assemble, meets the requirements for exhaust gas tightness.

Erfindungsgemäß wird diese Aufgabe gelöst durch eine Verbindungseinheit zum Verbinden zweier abgasführender Baugruppen einer Abgasanlage einer Brennkraftmaschine, umfassend:

  • ein ringscheibenartiges Verbindungselement mit einer einem mit dem Verbindungselement zu verbindenden Gegen-Verbindungselement zugewandt oder/und an diesem anliegend zu positionierenden Verbindungsseite und einer von einer Innenumfangsfläche des Verbindungselements umgrenzten Durchgriffsöffnung,
  • ein in die Durchgriffsöffnung eingesetztes, in Richtung einer Rohrlängsachse sich erstreckendes Verbindungsrohr.
According to the invention, this object is achieved by a connection unit for connecting two exhaust-gas-carrying assemblies of an exhaust system of an internal combustion engine, comprising:
  • an annular disk-like connecting element with a connecting side to be positioned facing a counter-connecting element to be connected to the connecting element and / or to be positioned in contact therewith a penetration opening delimited by an inner circumferential surface of the connecting element,
  • a connecting pipe inserted into the passage opening and extending in the direction of a pipe longitudinal axis.

Die erfindungsgemäße Verbindungseinheit zeichnet sich dadurch aus, dass das Verbindungsrohr mit dem Verbindungselement im Bereich der Innenumfangsfläche durch Verschweißung verbunden ist, oder/und dass das Verbindungsrohr mit einem Zentrierabschnitt an der Verbindungsseite des Verbindungselements übersteht.The connecting unit according to the invention is characterized in that the connecting tube is connected to the connecting element in the area of the inner circumferential surface by welding, and / or that the connecting tube protrudes with a centering section on the connecting side of the connecting element.

In dieser Verbindungseinheit sind verschiedene vorteilhafte Aspekte verwirklicht. Zum einen gewährleistet die Verbindung des Verbindungselements mit dem Verbindungsrohr im Bereich der Innenumfangsfläche des Verbindungsrohrs, dass bei Herstellung der Schweißverbindung Verformungen insbesondere des Verbindungselements weitestgehend vermieden werden können. Damit wird eine sehr gute Gasdichtigkeit bei Erzeugung einer Verbindung zwischen dem Verbindungselement und einem Gegen-Verbindungselement erreicht. Der Aspekt des Bereitstellens eines Zentrierabschnitts an der Verbindungseinheit erleichtert durch die vermittels dieses Zentrierabschnitts eingeführte Zentrierfunktion bezüglich eines Gegen-Verbindungselements den Zusammenbau einer Abgasanlage.Various advantageous aspects are implemented in this connection unit. On the one hand, the connection of the connecting element to the connecting tube in the area of the inner circumferential surface of the connecting tube ensures that deformations, in particular of the connecting element, can be largely avoided when the welded connection is made. This achieves very good gas tightness when a connection is created between the connecting element and a counter-connecting element. The aspect of providing a centering section on the connection unit facilitates the assembly of an exhaust system through the centering function introduced by means of this centering section with respect to a counter-connecting element.

Um die Schweißverbindung zwischen dem Verbindungsrohr und dem Verbindungselement an der Innenumfangsfläche erzeugen zu können, wird vorgeschlagen, dass das Verbindungsrohr in seinem von der Innenumfangsfläche axial überlappten Längenbereich wenigstens eine eine Rohrwandung des Verbindungsrohrs vollständig durchsetzende Schweißöffnung aufweist, und dass das Verbindungsrohr durch eine in der wenigstens einen Schweißöffnung gebildete Verschweißung mit dem Verbindungselement verbunden ist.In order to be able to produce the welded connection between the connecting pipe and the connecting element on the inner circumferential surface, it is proposed that the connecting pipe has at least one weld opening that completely penetrates a pipe wall of the connecting pipe in its length region axially overlapped by the inner circumferential surface, and that the connecting pipe is provided with one weld opening in the at least a weld opening formed weld is connected to the connecting element.

Um dabei über einen möglichst großen Umfangsbereich eine derartige Schweißverbindung bereitstellen zu können, kann das Verbindungsrohr eine Mehrzahl von in Umfangsrichtung um die Rohrlängsachse aufeinanderfolgenden Schweißöffnungen aufweisen.In order to be able to provide such a welded connection over as large a circumferential area as possible, the connecting tube can have a plurality of weld openings following one another in the circumferential direction around the longitudinal axis of the tube.

Um bei derartiger Ausgestaltung auch in Umfangsbereichen zwischen unmittelbar aufeinanderfolgenden Schweißöffnungen einen gasdichten Abschluss zwischen dem Verbindungsrohr und dem Verbindungselement bereitstellen zu können, wird vorgeschlagen, dass im Bereich wenigstens eines, vorzugsweise jedes zwischen zwei in Umfangsrichtung unmittelbar aufeinanderfolgenden Schweißöffnungen gebildeten Steges eine die in diesen Schweißöffnungen gebildeten Verschweißungen in Umfangsrichtung verbindende Verschweißung gebildet ist.In order to be able to provide a gas-tight seal between the connecting pipe and the connecting element in the circumferential areas between directly successive weld openings, in the case of such a configuration, it is proposed that in the area of at least one, preferably each web formed between two weld openings immediately following one another in the circumferential direction, one that is formed in these weld openings Welds connecting welds in the circumferential direction is formed.

Weiter ist vorteilhaft, wenn wenigstens eine, vorzugsweise jede Schweißöffnung in Umfangsrichtung um die Rohrlängsachse langgestreckt ist. Für die Erzeugung einer stabilen, gleichwohl aber gasdichten Anbindung ist es dabei vorteilhaft, wenn ein Umfangsabstand von in Umfangsrichtung um die Rohrlängsachse unmittelbar aufeinanderfolgenden Schweißöffnungen im Bereich von 2 mm bis 6 mm ist, oder/und wenn eine axiale Breite wenigstens einer, vorzugsweise jeder Schweißöffnung im Bereich von 2 mm bis 3 mm ist.It is also advantageous if at least one, preferably each welding opening is elongated in the circumferential direction around the longitudinal axis of the pipe. For the creation of a stable, but nevertheless gas-tight connection, it is advantageous if a circumferential distance between welding openings that follow one another in the circumferential direction around the longitudinal axis of the pipe is in the range of 2 mm to 6 mm, and / or if an axial width of at least one, preferably each welding opening is in the range of 2 mm to 3 mm.

Die Erfindung betrifft ferner eine Verbindungsbaugruppe zum Verbinden zweier abgasführender Baugruppen einer Abgasanlage einer Brennkraftmaschine, umfassend eine Verbindungseinheit mit dem vorangehend beschriebenen, erfindungsgemäßen Aufbau und ein mit einer Gegen-Verbindungsseite dem Verbindungselement der Verbindungseinheit zugewandt oder/und daran anliegend zu positionierendes ringscheibenartiges Gegen-Verbindungselement, wobei in dem Gegen-Verbindungselement eine der Durchgriffsöffnung entsprechende Zentrieröffnung vorgesehen ist.The invention also relates to a connection assembly for connecting two exhaust-gas-carrying assemblies of an exhaust system of an internal combustion engine, comprising a connection unit with the structure according to the invention described above and an annular disk-like counter-connection element with a counter connection side facing the connection element of the connection unit or / and to be positioned adjacent thereto, wherein a centering opening corresponding to the penetration opening is provided in the counter-connecting element.

Um dabei eine feste Verbindung zwischen dem Verbindungselement und dem Gegen-Verbindungselement bereitstellen zu können, kann die Verbindungsbaugruppe wenigstens ein Verbindungsorgan zum festen Verbinden des Verbindungselements mit dem Gegen-Verbindungselement umfassen.In order to be able to provide a fixed connection between the connecting element and the counter-connecting element, the connecting assembly can comprise at least one connecting element for firmly connecting the connecting element to the counter-connecting element.

Für eine besonders einfach herzustellende, gleichwohl jedoch stabile Verbindung wird vorgeschlagen, dass das wenigstens eine Verbindungsorgan einen das Verbindungselement oder/und das Gegen-Verbindungselement durchgreifenden Verbindungsbolzen umfasst.For a connection that is particularly simple to produce, but nevertheless stable, it is proposed that the at least one connecting element have a Comprises connecting element and / or the counter-connecting element penetrating connecting bolts.

Die Zentrierfunktion kann dadurch besonders effizient bereitgestellt werden, dass bei mit dem Verbindungselement verbundenem Gegen-Verbindungselement die Durchgriffsöffnung und die Zentrieröffnung zueinander im Wesentlichen deckungsgleich sind. Deckungsgleich bedeutet im Sinne der vorliegenden Erfindung, dass die beiden Öffnungen mit gleicher Öffnungsquerschnittsgeometrie, gleicher Öffnungsquerschnittsgröße und bezüglich der Rohrlängsachse gleicher radialer Positionierung bereitgestellt bzw. angeordnet sind.The centering function can be provided particularly efficiently in that, when the counter-connecting element is connected to the connecting element, the access opening and the centering opening are essentially congruent with one another. In the context of the present invention, congruent means that the two openings are provided or arranged with the same opening cross-sectional geometry, the same opening cross-sectional size and the same radial positioning with respect to the longitudinal axis of the pipe.

Zum Zentrieren des Verbindungselements bezüglich des Gegen-Verbindungselements kann bei mit dem Verbindungselement verbundenem Gegen-Verbindungselement der Zentrierabschnitt des Verbindungsrohrs in die Zentrieröffnung eingreifen.To center the connecting element with respect to the counter-connecting element, when the counter-connecting element is connected to the connecting element, the centering section of the connecting pipe can engage in the centering opening.

Die Erfindung betrifft ferner eine Abgasanlage, umfassend eine erfindungsgemäß aufgebaute Verbindungsbaugruppe, wobei mit dem Verbindungsrohr eine erste abgasführende Baugruppe verbunden ist und mit dem Gegen-Verbindungselement eine zweite abgasführende Baugruppe verbunden ist.The invention also relates to an exhaust system, comprising a connection assembly constructed according to the invention, a first exhaust-gas-carrying assembly being connected to the connecting pipe and a second exhaust-gas-carrying assembly being connected to the counter-connecting element.

Die vorliegende Erfindung wird nachfolgend mit Bezug auf die beiliegende Figur 1 detailliert beschrieben, welche eine Teil-Längsschnittdarstellung einer Abgasanlage für eine Brennkraftmaschine in einem Fahrzeug darstellt.The present invention will be explained hereinafter with reference to the accompanying Figure 1 described in detail, which represents a partial longitudinal sectional view of an exhaust system for an internal combustion engine in a vehicle.

In Fig. 1 ist ein Ausschnitt einer allgemein mit 10 bezeichneten Abgasanlage für eine Brennkraftmaschine eines Fahrzeugs zu erkennen. Insbesondere zeigt die Fig. 1 den Übergang zwischen einem so genannten "Hotend" 12 und einem so genannten "Coldend" 14 der Abgasanlage 10. In diesem Bereich sind zwei beispielsweise rohrartige abgasführende Baugruppen 16, 18 der Abgasanlage 10 durch eine Verbindungsbaugruppe 20 miteinander verbunden.In Fig. 1 a section of an exhaust system, generally designated 10, for an internal combustion engine of a vehicle can be seen. In particular, shows the Fig. 1 the transition between a so-called “hotend” 12 and a so-called “coldend” 14 of the exhaust system 10. In this area, two, for example, tubular exhaust-gas-carrying assemblies 16, 18 of the exhaust system 10 are connected to one another by a connection assembly 20.

Die Verbindungsbaugruppe 20 umfasst eine vorzugsweise an das "Hotend" 12, also die rohrartige Baugruppe 16, angebundene Verbindungseinheit 22 und ein mit der Verbindungseinheit 22 in nachfolgend beschriebener Art und Weise verbundenes und an das "Coldend" 14 bzw. die Baugruppe 18 angebundenes, ringscheibenartiges Gegen-Verbindungselement 24.The connection assembly 20 comprises a connection unit 22 that is preferably connected to the “hot end” 12, i.e. the tube-like assembly 16, and an annular disk-like connection unit 22 connected to the connection unit 22 in the manner described below and connected to the “cold end” 14 or assembly 18 Counter-connecting element 24.

Die Verbindungseinheit 22 umfasst ein mit dem Gegen-Verbindungselement 24 zu verbindendes Verbindungselement 26. Auch dieses ist ringscheibenartig ausgebildet und weist eine beispielsweise kreisartig geformte Durchgriffsöffnung 28 auf. In die Durchgriffsöffnung 28 ist ein in Richtung einer Rohrlängsachse L sich erstreckendes, vorzugsweise im Wesentlichen zylindrisch ausgebildetes Verbindungsrohr 30 eingesetzt. Dabei ist das Verbindungsrohr 30 mit einem Außendurchmesser seiner Rohrwandung 32 auf den Innendurchmesser der Durchgriffsöffnung 28 derart abgestimmt, dass bei in die Durchgriffsöffnung 28 eingesetztem Verbindungsrohr 30 dieses im Wesentlichen spielfrei in der Durchgriffsöffnung 28 aufgenommen ist. In dem von der Innenumfangsfläche 36 axial überlappten Längenbereich weist das Verbindungsrohr 30 im dargestellten Beispiel eine Mehrzahl von in Umfangsrichtung um die Längsachse L aufeinanderfolgenden, vorzugsweise langlochartig ausgebildeten Schweißöffnungen 38 auf. Diese Schweißöffnungen 38 durchsetzen die Rohrwandung 32 des Verbindungsrohrs 30, so dass grundsätzlich im Bereich der Schweißöffnungen 38 bei in die Durchgriffsöffnung 28 eingesetztem Verbindungsrohr 30 die Innenumfangsfläche 36 nach innen hin frei liegt, also nicht überdeckt ist.The connecting unit 22 comprises a connecting element 26 to be connected to the counter-connecting element 24. This connecting element is also designed in the manner of an annular disk and has a through-opening 28, for example, of circular shape. A preferably essentially cylindrical connecting pipe 30 extending in the direction of a pipe longitudinal axis L is inserted into the through opening 28. The connecting pipe 30 with an outer diameter of its pipe wall 32 is matched to the inner diameter of the access opening 28 in such a way that when the connecting pipe 30 is inserted into the access opening 28, it is received in the access opening 28 essentially without play. In the longitudinal region axially overlapped by the inner circumferential surface 36, the connecting pipe 30 in the example shown has a plurality of preferably slot-like weld openings 38 that follow one another in the circumferential direction about the longitudinal axis L. These welding openings 38 penetrate the pipe wall 32 of the connecting pipe 30, so that in principle in the area of the welding openings 38 when the connecting pipe 30 is inserted into the penetration opening 28, the inner circumferential surface 36 is exposed inward, i.e. not covered.

Zur Herstellung einer festen Verbindung zwischen dem Verbindungsrohr 30 und dem Verbindungselement 26 wird im Bereich jeder der Schweißöffnungen 38 eine diese vorzugsweise im Wesentlichen vollständig ausfüllende und damit eine materialschlüssige Verbindung des Verbindungsrohrs 30 mit dem Verbindungselement 26 herstellende Verschweißung 37 gebildet. Durch diese Verschweißungen 37 bezüglich der Innenumfangsfläche 36 des Verbindungselements 26 wird eine in Umfangsrichtung nahezu vollständig durchgehende, und somit im Wesentlichen gasdichte materialschlüssige Anbindung des Verbindungselements 26 an das Verbindungsrohr 30 gewährleistet. Um auch im Bereich der in Umfangsrichtung zwischen unmittelbar aufeinander folgenden Schweißöffnungen 38 gebildeten Stege 39 einen gasdichten Anschluss zwischen dem Verbindungsrohr 30 und dem Verbindungselement 26 zu erreichen, können die in den Schweißöffnungen 38 beispielsweise durch ein WIG- Schweißverfahren oder ein MAG- Schweißverfahren gebildeten Verschweißungen 37 über die Stege 39 in Umfangsrichtung hinweg geführt werden, um auch dort Verschweißungen 41 zu bilden. Auch die im Bereich dieser Stege 39 entlang der Innenumfangsfläche des Verbindungsrohrs 30 geführten Verschweißungen 41 führen durch den beim Erzeugen dieser Verschweißungen auftretenden Wärmeeintrag zu einem Materialschluss zwischen dem Verbindungsrohr 30 an seiner Außenumfangsfläche 34 und dem Verbindungselement 26 an seiner Innenumfangsfläche 36. Zum Erzeugen einer derartigen in Umfangsrichtung vollständig unterbrechungsfreien Verschweißung zwischen dem Verbindungsrohr 30 und dem Verbindungselement 26 ist es vorteilhaft, wenn die Stege 41 in Umfangsrichtung einen Länge von etwa 2 mm bis 6 mm aufweisen. Auch ist es vorteilhaft, wenn die Schweißöffnungen 38 eine axiale Breite, also eine Ausdehnung in Richtung der Rohrlängsachse L, im Bereich von 2 mm bis 3 mm aufweisen.To establish a firm connection between the connecting tube 30 and the connecting element 26, a weld 37 is formed in the area of each of the weld openings 38, which preferably essentially completely fills them and thus creates a material-locking connection between the connecting tube 30 and the connecting element 26. These welds 37 with respect to the inner circumferential surface 36 of the connecting element 26 ensure an almost completely continuous and thus essentially gas-tight material connection of the connecting element 26 to the connecting pipe 30 in the circumferential direction. To also in the area of the circumferential direction between directly following one another In order to achieve a gas-tight connection between the connecting pipe 30 and the connecting element 26, the welds 37 formed in the weld openings 38, for example by a TIG welding process or a MAG welding process, can be guided over the webs 39 in the circumferential direction in order to achieve a gas-tight connection between the connecting pipe 30 and the connecting element 26 to form welds 41 there too. The welds 41 made in the area of these webs 39 along the inner circumferential surface of the connecting tube 30 also lead to a material bond between the connecting tube 30 on its outer circumferential surface 34 and the connecting element 26 on its inner circumferential surface 36 due to the heat input that occurs when these welds are produced In the circumferential direction, completely uninterrupted welding between the connecting tube 30 and the connecting element 26, it is advantageous if the webs 41 have a length of approximately 2 mm to 6 mm in the circumferential direction. It is also advantageous if the welding openings 38 have an axial width, that is to say an extension in the direction of the pipe longitudinal axis L, in the range from 2 mm to 3 mm.

Das Verbindungsrohr 30 steht mit einem Zentrierabschnitt 40 an einer dem Gegenverbindungselement 24 zugewandt zu positionierenden Verbindungsseite 42 des Verbindungselements 26 über das Verbindungselement 26 über. In Entsprechung zur Durchgriffsöffnung 28 des Verbindungselements 26 ist im Gegen-Verbindungselement 24 eine Zentrieröffnung 44 gebildet. Bei mit einer Gegen-Verbindungsseite 46 an der Verbindungsseite 42 des Verbindungselements 26 anliegendem Gegen-Verbindungselement 24 greift der Zentrierabschnitt 40 in die Zentrieröffnung 44 ein und gewährleistet somit eine definierte Positionierung des Gegen-Verbindungselements 24 bezüglich des Verbindungselements 26. Da die Durchgriffsöffnung 28 und die Zentrieröffnung 24 bei aneinander anliegendem Verbindungselement 26 und Gegen-Verbindungselement 24 im Wesentlichen deckungsgleich sind, also aufgrund gleicher Querschnittsgeometrie, gleicher Querschnittsabmessung und gleicher Positionierung bezüglich der Rohrlängsachse A einander im Wesentlichen stufenfrei fortsetzen, greift das Verbindungsrohr 30 mit seinem Zentrierabschnitt 40 derart in die Zentrieröffnung 44 ein, dass die Außenumfangsfläche 34 des Verbindungsrohrs 30 im Bereich des Zentrierabschnitts 40 an einer die Zentrieröffnung 44 umgrenzenden Innenumfangsfläche 48 des Gegen-Verbindungselements 24 anliegen kann, so dass auch in diesem Bereich eine im Wesentlichen gasdichte Verbindung zwischen dem Verbindungsrohr 30 und dem Gegen-Verbindungselement 24 entsteht.The connecting pipe 30 protrudes with a centering section 40 on a connecting side 42 of the connecting element 26 to be positioned facing the mating connecting element 24 over the connecting element 26. A centering opening 44 is formed in the counter-connecting element 24 in correspondence with the penetration opening 28 of the connecting element 26. When the counter-connecting element 24 is in contact with a counter-connecting side 46 on the connecting side 42 of the connecting element 26, the centering section 40 engages in the centering opening 44 and thus ensures a defined positioning of the counter-connecting element 24 with respect to the connecting element 26 Centering opening 24 are essentially congruent when the connecting element 26 and counter-connecting element 24 are in contact with one another, i.e. due to the same cross-sectional geometry, the same cross-sectional dimension and the same positioning with respect to the pipe longitudinal axis A, the connecting pipe 30 engages with its centering section 40 in the centering opening 44 that the outer circumferential surface 34 of the connecting pipe 30 is in the area of the centering section 40 can rest against an inner circumferential surface 48 of the counter-connecting element 24 which delimits the centering opening 44, so that a substantially gas-tight connection between the connecting tube 30 and the counter-connecting element 24 is also created in this area.

Zur Herstellung einer festen Verbindung zwischen dem Verbindungselement 26 und dem Gegen-Verbindungselement 24 sind mehrere vorzugsweise als Schraubenbolzen ausgeführte Verbindungsorgane 50 vorgesehen. Diese können beispielsweise im Verbindungselement 26 vorgesehene Verbindungsbolzenöffnungen 52 durchgreifen und können auch im Gegen-Verbindungselement 24 vorgesehene Verbindungsbolzenöffnungen 52 durchgreifen, so dass an dem über das Gegen-Verbindungselement 24 überstehenden Enden beispielsweise durch Aufbringen von Muttern oder dergleichen, ein fester Zusammenhalt hergestellt werden kann. Alternativ können beispielsweise die Verbindungsorganöffnungen 54 im Gegen-Verbindungselement 24 als Innengewindeöffnungen ausgebildet sein, in welche zur Herstellung eines festen Anschlusses die Verbindungsorgane 50 eingeschraubt werden können.To establish a firm connection between the connecting element 26 and the counter-connecting element 24, a plurality of connecting members 50, preferably designed as screw bolts, are provided. These can, for example, pass through connecting bolt openings 52 provided in the connecting element 26 and can also pass through connecting bolt openings 52 provided in the counter-connecting element 24, so that a firm cohesion can be established at the ends protruding beyond the counter-connecting element 24, for example by applying nuts or the like. Alternatively, for example, the connecting element openings 54 in the counter-connecting element 24 can be designed as internally threaded openings into which the connecting elements 50 can be screwed in order to establish a fixed connection.

Durch die Verbindungsorgane 50 wird das Verbindungselement 26 mit seiner Verbindungsseite 42 bzw. einer dort vorgesehenen, im Wesentlichen planen Oberfläche, gegen die Gegen-Verbindungsseite 46 bzw. eine dort vorgesehene Oberfläche des Gegen-Verbindungselements 24 gepresst, so dass auch in diesem Bereich ein im Wesentlicher gasdichter Anschluss erzielt wird. Dieser kann durch das Positionieren eines Dichtungselements zwischen der Verbindungsseite 42 und der Gegen-Verbindungsseite 46 unterstützt werden. Da bei der Anbindung des Verbindungsrohrs 30 an das Verbindungselement 26 die Verschweißung im Bereich der Innenumfangsfläche 36 des Verbindungselements 26 erfolgt, wird eine durch die beim Verschweißen auftretende Erwärmung indizierte Verformung des Verbindungselements 26 praktisch ausgeschlossen. Dies stellt sicher, dass dieses mit hoher Präzision auch im Bereich seiner Verbindungsseite 42 bereitgestellt wird und somit in Anlagewechselwirkung mit dem Gegen-Verbindungsorgan 24 ein gasdichter Anschluss gewährleistet werden kann.The connecting elements 50 press the connecting element 26 with its connecting side 42 or a substantially planar surface provided there against the counter-connecting side 46 or a surface of the counter-connecting element 24 provided there, so that in this area too an in Essential gas-tight connection is achieved. This can be supported by positioning a sealing element between the connection side 42 and the opposite connection side 46. Since the connection of the connecting pipe 30 to the connecting element 26 involves welding in the area of the inner circumferential surface 36 of the connecting element 26, deformation of the connecting element 26 indicated by the heating occurring during welding is practically excluded. This ensures that this is also provided with high precision in the area of its connection side 42 and thus a gas-tight connection can be ensured in contact interaction with the counter-connecting element 24.

Claims (11)

Verbindungseinheit zum Verbinden zweier abgasführender Baugruppen einer Abgasanlage einer Brennkraftmaschine, umfassend: - ein ringscheibenartiges Verbindungselement (26) mit einer einem mit dem Verbindungselement (26) zu verbindenden Gegen-Verbindungselement (24) zugewandt oder/und an diesem anliegend zu positionierenden Verbindungsseite (42) und einer von einer Innenumfangsfläche (36) des Verbindungselements (26) umgrenzten Durchgriffsöffnung (28), - ein in die Durchgriffsöffnung (28) eingesetztes, in Richtung einer Rohrlängsachse (L) sich erstreckendes Verbindungsrohr (30), dadurch gekennzeichnet, dass das Verbindungsrohr (30) mit dem Verbindungselement (26) im Bereich der Innenumfangsfläche (36) durch Verschweißung verbunden ist, oder/und dass das Verbindungsrohr (30) mit einem Zentrierabschnitt (40) an der Verbindungsseite (42) des Verbindungselements (26) übersteht.Connection unit for connecting two exhaust-gas-carrying assemblies of an exhaust system of an internal combustion engine, comprising: - An annular disk-like connecting element (26) with a connecting side (42) to be positioned facing a mating connecting element (24) to be connected to the connecting element (26) and one of an inner circumferential surface (36) of the connecting element (26) to be positioned adjacent to it. delimited access opening (28), - A connecting pipe (30) inserted into the passage opening (28) and extending in the direction of a pipe longitudinal axis (L), characterized in that the connecting tube (30) is connected to the connecting element (26) in the area of the inner circumferential surface (36) by welding, and / or that the connecting tube (30) is connected to a centering section (40) on the connecting side (42) of the connecting element (26) survives. Verbindungseinheit nach Anspruch 1, dadurch gekennzeichnet, dass das Verbindungsrohr (30) in seinem von der Innenumfangsfläche (36) axial überlappten Längenbereich wenigstens eine eine Rohrwandung (32) des Verbindungsrohrs (30) vollständig durchsetzende Schweißöffnung (38) aufweist, und dass das Verbindungsrohr (30) durch eine in der wenigstens einen Schweißöffnung (38) gebildete Verschweißung (37) mit dem Verbindungselement (26) verbunden ist.Connecting unit according to claim 1, characterized in that the connecting pipe (30) has in its length region axially overlapped by the inner circumferential surface (36) at least one welding opening (38) completely penetrating a pipe wall (32) of the connecting pipe (30), and that the connecting pipe ( 30) is connected to the connecting element (26) by a weld (37) formed in the at least one welding opening (38). Verbindungseinheit nach Anspruch 2, dadurch gekennzeichnet, dass das Verbindungsrohr (30) eine Mehrzahl von in Umfangsrichtung um die Rohrlängsachse (L) aufeinanderfolgenden Schweißöffnungen (38) aufweist.Connecting unit according to Claim 2, characterized in that the connecting pipe (30) has a plurality of welding openings (38) following one another in the circumferential direction around the pipe's longitudinal axis (L). Verbindungseinheit nach Anspruch 3, dadurch gekennzeichnet, dass im Bereich wenigstens eines, vorzugsweise jedes zwischen zwei in Umfangsrichtung unmittelbar aufeinander folgenden Schweißöffnungen (38) gebildeten Steges (39) eine die in diesen Schweißöffnungen (38) gebildeten Verschweißungen (37) in Umfangsrichtung verbindende Verschweißung (41) gebildet ist.Connection unit according to claim 3, characterized in that in the region of at least one, preferably each between two welding openings (38) which follow one another in the circumferential direction formed web (39) a weld (37) formed in these weld openings (38) connecting in the circumferential direction weld (41) is formed. Verbindungseinheit nach einem der Ansprüche 2-4, dadurch gekennzeichnet, dass wenigstens eine, vorzugsweise jede Schweißöffnung (38) in Umfangsrichtung um die Rohrlängsachse (L) langgestreckt ist, oder/und dass ein Umfangsabstand von in Umfangsrichtung um die Rohrlängsachse (L) unmittelbar aufeinanderfolgenden Schweißöffnungen (38) im Bereich von 2 mm bis 6 mm ist, oder/und dass eine axiale Breite wenigstens einer, vorzugsweise jeder Schweißöffnung (38) im Bereich von 2 mm bis 3 mm ist.Connection unit according to one of claims 2-4, characterized in that at least one, preferably each welding opening (38) is elongated in the circumferential direction around the pipe longitudinal axis (L), and / or that a circumferential distance of immediately successive ones in the circumferential direction around the pipe longitudinal axis (L) Welding openings (38) in the range from 2 mm to 6 mm, and / or that an axial width of at least one, preferably each welding opening (38) is in the range from 2 mm to 3 mm. Verbindungsbaugruppe zum Verbinden zweier abgasführender Baugruppen (16, 18) einer Abgasanlage einer Brennkraftmaschine, umfassend eine Verbindungseinheit (22) nach einem der vorangehenden Ansprüche und ein mit einer Gegen-Verbindungsseite (46) dem Verbindungselement (26) der Verbindungseinheit (22) zugewandt oder/und daran anliegend zu positionierendes ringscheibenartiges Gegen-Verbindungselement (24), wobei in dem Gegen-Verbindungselement (24) eine der Durchgriffsöffnung (28) entsprechende Zentrieröffnung (44) vorgesehen ist.Connection assembly for connecting two exhaust-gas-carrying assemblies (16, 18) of an exhaust system of an internal combustion engine, comprising a connection unit (22) according to one of the preceding claims and a connecting element (26) of the connection unit (22) with a mating connection side (46) facing or / and an annular disk-like counter-connecting element (24) to be positioned adjacent thereto, a centering opening (44) corresponding to the penetration opening (28) being provided in the counter-connecting element (24). Verbindungsbaugruppe nach Anspruch 6, gekennzeichnet durch wenigstens ein Verbindungsorgan (50) zum festen Verbinden des Verbindungselements (26) mit dem Gegen-Verbindungselement (24).Connection assembly according to Claim 6, characterized by at least one connection element (50) for firmly connecting the connection element (26) to the counter-connection element (24). Verbindungsbaugruppe nach Anspruch 7, dadurch gekennzeichnet, dass das wenigstens eine Verbindungsorgan (50) einen das Verbindungselement (26) oder/und das Gegen-Verbindungselement (24) durchgreifenden Verbindungsbolzen umfasst.Connection assembly according to Claim 7, characterized in that the at least one connection element (50) comprises a connection bolt which extends through the connection element (26) and / or the counter-connection element (24). Verbindungbaugruppe nach einem der Ansprüche 6-8, dadurch gekennzeichnet, dass bei mit dem Verbindungselement (26) verbundenem Gegen-Verbindungselement (24) die Durchgriffsöffnung (28) und die Zentrieröffnung (44) zueinander im Wesentlichen deckungsgleich sind.Connection assembly according to one of claims 6-8, characterized in that when connected to the connecting element (26) Counter-connecting element (24), the passage opening (28) and the centering opening (44) are essentially congruent with one another. Verbindungsbaugruppe nach einem der Ansprüche 6-9, dadurch gekennzeichnet, dass bei mit dem Verbindungselement (26) verbundenem Gegen-Verbindungselement (24) der Zentrierabschnitt (40) des Verbindungsrohrs (30) in die Zentrieröffnung (44) eingreift.Connecting assembly according to one of Claims 6-9, characterized in that when the counter-connecting element (24) is connected to the connecting element (26), the centering section (40) of the connecting tube (30) engages in the centering opening (44). Abgasanlage, umfassend eine Verbindungsbaugruppe (20) nach einem der Ansprüche 6-10, wobei mit dem Verbindungsrohr (30) eine erste abgasführende Baugruppe (16) verbunden ist und mit dem Gegen-Verbindungselement (24) eine zweite abgasführende Baugruppe (18) verbunden ist.Exhaust system, comprising a connection assembly (20) according to one of claims 6-10, wherein a first exhaust-gas-carrying assembly (16) is connected to the connecting pipe (30) and a second exhaust-gas-carrying assembly (18) is connected to the counter-connecting element (24) .
EP20203189.4A 2019-11-26 2020-10-22 Connecting unit Active EP3828397B1 (en)

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JPH03189317A (en) * 1989-12-18 1991-08-19 Nissan Motor Co Ltd Exhaust system connector
JP2000136722A (en) * 1998-11-02 2000-05-16 Yutaka Giken Co Ltd Double exhaust pipe
US20050127670A1 (en) * 2001-11-30 2005-06-16 Maximilian Huber Method and device for connecting parts of an exhaust gas system
CN109209594A (en) * 2018-11-16 2019-01-15 十堰楚欣达汽车科技股份有限公司 A kind of novel commercial vehicle exhaust port

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CN112943435A (en) 2021-06-11

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