EP1384867B1 - Sealing device for an exhaust gas pipe - Google Patents

Sealing device for an exhaust gas pipe Download PDF

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Publication number
EP1384867B1
EP1384867B1 EP03014910A EP03014910A EP1384867B1 EP 1384867 B1 EP1384867 B1 EP 1384867B1 EP 03014910 A EP03014910 A EP 03014910A EP 03014910 A EP03014910 A EP 03014910A EP 1384867 B1 EP1384867 B1 EP 1384867B1
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EP
European Patent Office
Prior art keywords
pipe
exhaust gas
pipe part
socket
pipe socket
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.)
Expired - Fee Related
Application number
EP03014910A
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German (de)
French (fr)
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EP1384867A1 (en
Inventor
Axel LÖFFLER
Karl-Heinz Metzger
Stephan Tafel
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Daimler AG
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DaimlerChrysler AG
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Publication date
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Publication of EP1384867A1 publication Critical patent/EP1384867A1/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
    • F01N13/185—Mechanical joints the connection being realised 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
    • 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
    • F01N13/14—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 thermal insulation
    • 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
    • F01N13/1827—Sealings specially adapted for exhaust systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/12—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems characterised by means for attaching parts of an EGR system to each other or to engine parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/18—Thermal insulation or heat protection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10268—Heating, cooling or thermal insulating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10314—Materials for intake systems
    • F02M35/10321—Plastics; Composites; Rubbers

Definitions

  • the invention relates to a device for sealing a pipe part of an exhaust gas recirculation line with one in one Wall part of an exhaust gas recirculation pipe recorded sleeve, the first with the pipe part firmly connected, at least in the front region cylindrically shaped pipe part has, to which a second larger in diameter Pipe part connects, in the region of its end a second cylindrical tube part, which serves as a contact surface for a ring seal is used, which is accommodated in a flange part is.
  • the sleeve consists for this purpose of a first cylindrical part, which is firmly connected to the exhaust pipe.
  • To the cylindrical part closes a conically widening Pipe part with a flange for receiving a ring seal on, by means of the flange against the front side of Pipe socket is pressed.
  • Such an assembly is complicated and expensive.
  • the sleeve has a first fixed to the exhaust gas recirculation pipeline, at least in the front region cylindrically shaped Pipe part on which a second larger in diameter Pipe part connects, in the region of its end a second cylindrical tube part, which serves as a contact surface for a ring seal is used.
  • the ring seal is using a provided on the pipe part flange against a Surface of the wall part pressed.
  • the invention has for its object to provide the device for Sealing a pipe part of an exhaust pipe so train and arrange that at the same time good Sealing effect and high stability of the sealing material the Pipe part to assemble properly in a very short time leaves.
  • the object is achieved according to the invention in that between the first and second tube part is a conical widening clamping part is provided, with its Surface by insertion into the pipe socket against the conically expanding pipe socket comes to rest and thus acting as a frictional connection clamping connection is formed.
  • This will be without additional Screw connection between the exhaust gas recirculation pipe and the Mixed housing created a perfect clamping connection and completely dispensed with additional screw.
  • There between the mixing housing and the exhaust gas recirculation pipe a is provided conically expanding sleeve, you get a gentle sealing, because of the simple cooling between Sleeve and exhaust gas recirculation pipe overheating of the ring seal is avoided.
  • Friction connection acting clamping part an angle ⁇ which is between 7 ° and 15 °, in particular between 8 ° and 12 °, is large.
  • the exhaust gas recirculation pipe part in a pipe socket provided in a mixing housing can be clamped, which has a bore with cylindrical Turnout and a subsequent conical part has, whose side part at an angle with the central axis which is equal, slightly smaller or slightly larger than the angle is ⁇ .
  • Solution is finally provided, that is in the Mixed housing extending pipe socket is tapered so, that its outlet opening is in the flow direction of Fresh air extends.
  • 1 shows an exhaust gas recirculation pipe, the detachable via a clamping connection with a mixing tube 7 connected is.
  • the mixing tube 7, as a pipe part in the drawing in section is shown schematically, has a cylindrical wall part 7.1, 7.2 up.
  • wall part 7.2 is a cylindrical trained pipe socket with an annular groove for receiving a sealing ring or a pipe ring shown.
  • the Pipe socket 17 consists of a first part, as cylindrical recess 20 is formed, to which a Conically tapered part 21 connects.
  • the part 21 is Also referred to as a clamping part for receiving a also similarly shaped sleeve 4 is used.
  • the sleeve 4 consists of a first cylindrical trained pipe part 6, whose inner diameter is approximately the outer diameter of the front pipe socket 2.1 of Exhaust gas recirculation pipe part 2 corresponds.
  • the front end of the Sleeve 4 can be soldered, for example, with the pipe part 2.1 or shrunk.
  • To the cylindrical part 6 of Sleeve 4 is followed by a conically widening part 10 on and to the part 10 again a cylindrical tube part 11, which is provided with an inlet opening.
  • the pipe part 11 corresponds with its outer diameter in about the Inner diameter of the pipe socket 17, in which in his Ring groove an annular seal or O-ring seal 5 inserted is.
  • the closes Surface or the slope 20 of the flared Part of acting as a frictional connection clamping connection with the longitudinal central axis 22 of the exhaust gas recirculation pipe part 2 an angle ⁇ .
  • the angle ⁇ can be between 7 ° and 15 °, in advantageously between 8 ° and 12 °, preferably 10 ° be great to have a very good frictional connection between to ensure the parts to be joined.
  • the sleeve 4 is so with its two surfaces of the part 11 and the part 10 against the inner surfaces of the part 20 and 21 at. Since the sleeve 4 or the part 11 a gap between the surface of Exhaust gas recirculation pipe part 2 forms, one automatically receives a good cooling, allowing overheating of the sleeve 4 and thus the ring seal 5 is avoided.
  • the front end or the outlet opening 2.2 of the exhaust gas recirculation pipe part 2 at an angle ⁇ beveled.
  • a part of the exhaust gas according to Case 3 almost lossless in the main flow of fresh air introduced according to Part 18 in the mixing housing 7.
  • Another Improvement is achieved in that the front end 2.2 as far as angled or curved, that the Longitudinal axis of the pipe part 2 in approximately parallel to Longitudinal axis of the mixing housing 7 runs. This gives you a laminar inflow of the exhaust gas into the fresh air of Mixed housing 7.
  • a part of the Exhaust gas recirculation housing 2 via a bracket 12 in addition be secured.
  • the holder 12 with a U-shaped Holder part 14, which is the outer circumference of Part of the exhaust gas recirculation pipe part 2 surrounds.
  • the Bracket 2 with the pipe part 2 soldered or otherwise be firmly connected.
  • the other or second end of the Holder 12 is not by means of a drawing illustrated fastening bolt to a bore 13th connected, which via a tab 13.1 to the wall part 7.2 connected.
  • the angle ⁇ shown in the drawing can also be so be big like the angle ⁇ .
  • the Angle ⁇ in about 15 °.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Abdichten eines Rohrteils einer Abgasrückführleitung mit einer in einem Wandteil einer Abgasrückführrohrleitung aufgenommenen Hülse, die ein erstes mit dem Rohrteil fest verbundenes, zumindest im vorderen Bereich zylindrisch ausgebildetes Rohrteil aufweist, an das sich ein zweites im Durchmesser größeres Rohrteil anschließt, das im Bereich seines Endes ein zweites zylindrisches Rohrteil aufweist, das als Anlagefläche für eine Ringdichtung dient, die in einem Flanschteil aufgenommen ist.The invention relates to a device for sealing a pipe part of an exhaust gas recirculation line with one in one Wall part of an exhaust gas recirculation pipe recorded sleeve, the first with the pipe part firmly connected, at least in the front region cylindrically shaped pipe part has, to which a second larger in diameter Pipe part connects, in the region of its end a second cylindrical tube part, which serves as a contact surface for a ring seal is used, which is accommodated in a flange part is.

Es ist bereits eine Rohrleitung und eine Abgasleitung bekannt, die über eine Hülse und ein Flanschteil an einen Flanschstutzen mittels Schrauben lösbar angeschlossen ist. Die Hülse besteht hierzu aus einem ersten zylindrischen Teil, das mit der Abgasrohrleitung fest verbunden ist. An das zylindrische Teil schließt sich ein sich konisch erweiterndes Rohrteil mit einem Flansch zur Aufnahme einer Ringdichtung an, die mittels des Flansches gegen die Stirnseite des Rohrstutzens gepresst wird. Eine derartige Montage ist aufwendig und teuer. It is already a pipeline and an exhaust pipe known, via a sleeve and a flange to a Flange connection is detachably connected by means of screws. The sleeve consists for this purpose of a first cylindrical part, which is firmly connected to the exhaust pipe. To the cylindrical part closes a conically widening Pipe part with a flange for receiving a ring seal on, by means of the flange against the front side of Pipe socket is pressed. Such an assembly is complicated and expensive.

Es ist ferner eine Vorrichtung zum Abdichten eines Rohrteils einer Abgasrückführleitung bekannt (US 5 433 183), die mit einer in einem Wandteil einer Abgasrückführrohrleitung aufgenommenen Hülse ausgestattet ist. Die Hülse weist ein erstes mit der Abgasrückführrohrleitung fest verbundenes, zumindest im vorderen Bereich zylindrisch ausgebildetes Rohrteil auf, an das sich ein zweites im Durchmesser größeres Rohrteil anschließt, das im Bereich seines Endes ein zweites zylindrisches Rohrteil aufweist, das als Anlagefläche für eine Ringdichtung dient. Die Ringdichtung wird mit Hilfe eines an dem Rohrteil vorgesehenen Flansches gegen eine Oberfläche des Wandteils gepresst. Die Befestigung und Abdichtung der Abgasrückführleitung in dem Wandteil ist kompliziert und erfordert eine aufwendige Montage.It is also a device for sealing a pipe part an exhaust gas recirculation line known (US 5,433,183), which with one in a wall portion of an exhaust gas recirculation piping received sleeve is equipped. The sleeve has a first fixed to the exhaust gas recirculation pipeline, at least in the front region cylindrically shaped Pipe part on which a second larger in diameter Pipe part connects, in the region of its end a second cylindrical tube part, which serves as a contact surface for a ring seal is used. The ring seal is using a provided on the pipe part flange against a Surface of the wall part pressed. The attachment and Seal the exhaust gas recirculation line in the wall part is complicated and requires a complex assembly.

Der Erfindung liegt die Aufgabe zugrunde, die Vorrichtung zum Abdichten eines Rohrteils einer Abgasleitung derart auszubilden und anzuordnen, dass bei gleichzeitig guter Dichtwirkung und hoher Standfestigkeit des Dichtmaterials das Rohrteil sich in sehr kurzer Zeit einwandfrei montieren lässt.The invention has for its object to provide the device for Sealing a pipe part of an exhaust pipe so train and arrange that at the same time good Sealing effect and high stability of the sealing material the Pipe part to assemble properly in a very short time leaves.

Gelöst wird die Aufgabe erfindungsgemäß dadurch, dass zwischen dem ersten und zweiten Rohrteil ein sich konisch erweiterndes Klemmteil vorgesehen ist, das mit seiner Oberfläche durch Einschieben in den Rohrstutzen gegen den sich konisch erweiternden Rohrstutzen zur Anlage kommt und damit eine als Reibschlussverbindung wirkende Klemmverbindung gebildet wird. Hierdurch wird ohne zusätzliche Schraubverbindung zwischen dem Abgasrückführrohr und dem Mischgehäuse eine einwandfreie Klemmverbindung geschaffen und auf zusätzliche Schraubelemente vollständig verzichtet. Da zwischen dem Mischgehäuse und dem Abgasrückführrohr eine sich konisch erweiternde Hülse vorgesehen ist, erhält man eine schonende Abdichtung, da durch die einfache Kühlung zwischen Hülse und Abgasrückführrohr eine Überhitzung der Ringdichtung vermieden wird.The object is achieved according to the invention in that between the first and second tube part is a conical widening clamping part is provided, with its Surface by insertion into the pipe socket against the conically expanding pipe socket comes to rest and thus acting as a frictional connection clamping connection is formed. This will be without additional Screw connection between the exhaust gas recirculation pipe and the Mixed housing created a perfect clamping connection and completely dispensed with additional screw. There between the mixing housing and the exhaust gas recirculation pipe a is provided conically expanding sleeve, you get a gentle sealing, because of the simple cooling between Sleeve and exhaust gas recirculation pipe overheating of the ring seal is avoided.

Hierzu ist es vorteilhaft, dass zwischen der Mittelachse des Rohrteils und der Schräge des sich konisch erweiternden, als Reibschlussverbindung wirkenden Klemmteils ein Winkel α eingeschlossen ist, der zwischen 7° und 15°, insbesondere zwischen 8° und 12°, groß ist.For this purpose, it is advantageous that between the central axis of the Pipe part and the slope of the flared, than Friction connection acting clamping part an angle α which is between 7 ° and 15 °, in particular between 8 ° and 12 °, is large.

Vorteilhaft ist es hierzu auch, dass das Abgasrückführrohrteil in einen in einem Mischgehäuse vorgesehenen Rohrstutzen einklemmbar ist, der eine Bohrung mit zylindrischer Ausdrehung und ein sich daran anschließendes konisches Teil aufweist, dessen Seitenteil einen Winkel mit der Mittelachse einschließt, der gleich, etwas kleiner oder etwas größer als der Winkel α ist.It is advantageous for this purpose that the exhaust gas recirculation pipe part in a pipe socket provided in a mixing housing can be clamped, which has a bore with cylindrical Turnout and a subsequent conical part has, whose side part at an angle with the central axis which is equal, slightly smaller or slightly larger than the angle is α.

Gemäß einer bevorzugten Ausführungsform der erfindungsgemäßen Lösung ist schließlich vorgesehen, dass der sich in das Mischgehäuse erstreckende Rohrstutzen derart abgeschrägt ist, dass seine Auslassöffnung sich in Strömungsrichtung der Frischluft erstreckt.According to a preferred embodiment of the invention Solution is finally provided, that is in the Mixed housing extending pipe socket is tapered so, that its outlet opening is in the flow direction of Fresh air extends.

Durch die konische Ausbildung der Hülse erhält man auf einfache Weise einen ausreichenden Abstand zwischen dem Flanschteil, der Ringdichtung und dem heißen Teil des Abgasrückführrohrs. Die konische Ausbildung von Flansch und Hülse als Reibschlussverbindung reicht aus, um eine gute Verbindung zwischen dem Mischgehäuse und dem Abgasrückführrohrteil zu schaffen. Eine zusätzliche Sicherung des Abgasrückführrohrteils erreicht man durch die U-förmig ausgebildete Halterung, die einerseits einen Teil des Abgasrückführrohrs hält und zum anderen mit dem Mischgehäuse lösbar verbunden ist. Eine Sicherung der Reibschlussverbindung des Abgasrückführrohrs kann auch dadurch erreicht werden, dass das in der Zeichnung nicht dargestellte hintere Ende des Rohrteils mit weiteren Rohrverbindungen verbunden ist, die verhindern, dass im eingebauten Zustand das Rohrstück aus der Reibschlussverbindung herausgedrückt wird.Due to the conical design of the sleeve is obtained easy way a sufficient distance between the Flange part, the ring seal and the hot part of the Exhaust gas recirculation tube. The conical design of flange and Sleeve as frictional connection is sufficient to a good Connection between the mixing housing and the To create exhaust gas recirculation pipe part. An additional backup the exhaust gas recirculation pipe part is reached through the U-shaped trained bracket, on the one hand part of the Exhaust gas recirculation pipe holds and the other with the mixing housing is detachably connected. A backup of the frictional connection the exhaust gas recirculation pipe can also be achieved be that the rear not shown in the drawing End of the pipe part connected to other pipe connections is that prevent when installed the Pipe piece is pushed out of the frictional connection.

Vorteilhaft ist es ferner, dass das Abgasrückführrohrteil mittels einer Halterung mit einem Teil des Mischgehäuses verbunden ist.It is also advantageous that the exhaust gas recirculation pipe part connected by a holder with a part of the mixing housing is.

Weitere Vorteile und Einzelheiten der Erfindung sind in den Patentansprüchen und in der Beschreibung erläutert und in der Figur 1 dargestellt.Further advantages and details of the invention are in the Claims and explained in the description and in the Figure 1 shown.

In der Zeichnung ist mit 1 ein Abgasrückführrohr dargestellt, das über eine Klemmverbindung mit einem Mischrohr 7 lösbar verbunden ist.In the drawing, 1 shows an exhaust gas recirculation pipe, the detachable via a clamping connection with a mixing tube 7 connected is.

Das Mischrohr 7, das als Rohrteil in der Zeichnung im Schnitt schematisch dargestellt ist, weist ein zylindrisches Wandteil 7.1, 7.2 auf. In dem Wandteil 7.2 ist ein zylinderförmig ausgebildeter Rohrstutzen mit einer Ringnut zur Aufnahme eines Dichtungsrings bzw. eines Rohrrings dargestellt. Der Rohrstutzen 17 besteht aus einem ersten Teil, das als zylindrische Ausdrehung 20 ausgebildet ist, an das sich ein sich konisch verjüngendes Teil 21 anschließt. Das Teil 21 ist auch als Klemmteil bezeichnet, das zur Aufnahme einer ebenfalls ähnlich ausgebildeten Hülse 4 dient. The mixing tube 7, as a pipe part in the drawing in section is shown schematically, has a cylindrical wall part 7.1, 7.2 up. In the wall part 7.2 is a cylindrical trained pipe socket with an annular groove for receiving a sealing ring or a pipe ring shown. Of the Pipe socket 17 consists of a first part, as cylindrical recess 20 is formed, to which a Conically tapered part 21 connects. The part 21 is Also referred to as a clamping part for receiving a also similarly shaped sleeve 4 is used.

Die Hülse 4 besteht aus einem ersten zylindrisch ausgebildeten Rohrteil 6, dessen innerer Durchmesser in etwa dem Außendurchmesser des vorderen Rohrstutzens 2.1 des Abgasrückführrohrteils 2 entspricht. Das vordere Ende der Hülse 4 kann beispielsweise mit dem Rohrteil 2.1 verlötet oder aufgeschrumpft sein. An das zylindrische Teil 6 der Hülse 4 schließt sich ein sich konisch erweiterndes Teil 10 an und an das Teil 10 wieder ein zylindrisches Rohrteil 11, das mit einer Einlassöffnung versehen ist. Das Rohrteil 11 entspricht mit seinem Außendurchmesser in etwa dem Innendurchmesser des Rohrstutzens 17, in dem in seiner Ringnut eine Ringdichtung bzw. O-Ringdichtung 5 eingelassen ist. Durch Einschieben der Hülse 4 in den Rohrstutzen 17 kommt das zylindrische Teil 11 der Hülse 4 mit seiner Oberfläche gegen die Ringdichtung 5 zur Anlage. Das sich konisch erweiternde Teil bzw. Klemmteil 10 liegt gemäß Zeichnung gegen das konische Teil 21 des Rohrstutzens 17 an. Hierdurch wird eine Reibschlussverbindung zwischen dem Stutzen 17 und der Hülse 4 auf einfache Weise geschaffen.The sleeve 4 consists of a first cylindrical trained pipe part 6, whose inner diameter is approximately the outer diameter of the front pipe socket 2.1 of Exhaust gas recirculation pipe part 2 corresponds. The front end of the Sleeve 4 can be soldered, for example, with the pipe part 2.1 or shrunk. To the cylindrical part 6 of Sleeve 4 is followed by a conically widening part 10 on and to the part 10 again a cylindrical tube part 11, which is provided with an inlet opening. The pipe part 11 corresponds with its outer diameter in about the Inner diameter of the pipe socket 17, in which in his Ring groove an annular seal or O-ring seal 5 inserted is. By inserting the sleeve 4 in the pipe socket 17th comes the cylindrical part 11 of the sleeve 4 with his Surface against the ring seal 5 to the plant. That is conical widening part or clamping part 10 is according to Drawing against the conical part 21 of the pipe socket 17 at. As a result, a frictional connection between the Stub 17 and the sleeve 4 created in a simple manner.

Wie aus der Zeichnung ferner hervorgeht, schließt die Oberfläche bzw. die Schräge 20 des sich konisch erweiternden Teils der als Reibschlussverbindung wirkenden Klemmverbindung mit der Längsmittelachse 22 des Abgasrückführrohrteils 2 einen Winkel α ein. Der Winkel α kann zwischen 7° und 15°, in vorteilhafter Weise zwischen 8° und 12°, vorzugsweise 10° groß sein, um eine sehr gute Reibschlussverbindung zwischen den zu verbindenden Teilen zu gewährleisten.As is apparent from the drawing, the closes Surface or the slope 20 of the flared Part of acting as a frictional connection clamping connection with the longitudinal central axis 22 of the exhaust gas recirculation pipe part 2 an angle α. The angle α can be between 7 ° and 15 °, in advantageously between 8 ° and 12 °, preferably 10 ° be great to have a very good frictional connection between to ensure the parts to be joined.

Wie aus der Zeichnung ferner hervorgeht, entspricht der Innendurchmesser des sich konisch erweiternden Teils 21 des Stutzens 17 in etwa dem Außendurchmesser des konischen Rohrteils bzw. Klemmteils 10. Die Hülse 4 liegt also mit ihren beiden Oberflächen des Teils 11 und des Teils 10 gegen die Innenoberflächen des Teils 20 und 21 an. Da die Hülse 4 bzw. das Teil 11 einen Spalt zwischen der Oberfläche des Abgasrückführrohrteils 2 bildet, erhält man automatisch eine gute Kühlung, so dass eine Überhitzung der Hülse 4 und somit der Ringdichtung 5 vermieden wird.As is apparent from the drawing, the corresponds Inner diameter of the conically widening part 21 of the Stutzens 17 in about the outer diameter of the conical Pipe part or clamping part 10. The sleeve 4 is so with its two surfaces of the part 11 and the part 10 against the inner surfaces of the part 20 and 21 at. Since the sleeve 4 or the part 11 a gap between the surface of Exhaust gas recirculation pipe part 2 forms, one automatically receives a good cooling, allowing overheating of the sleeve 4 and thus the ring seal 5 is avoided.

Im Ausführungsbeispiel ist das vordere Ende bzw. die Auslassöffnung 2.2 des Abgasrückführrohrteils 2 in einem Winkel β abgeschrägt. Auf diese Weise wird ein Teil des Abgases gemäß Fall 3 fast verlustfrei in den Hauptstrom der Frischluft gemäß Teil 18 in das Mischgehäuse 7 eingeführt. Eine weitere Verbesserung wird dadurch erreicht, dass das vordere Ende 2.2 soweit abgewinkelt bzw. gekrümmt ist, dass die Längsmittelachse der Rohrteils 2 in etwa parallel zur Längsmittelachse des Mischgehäuses 7 läuft. Damit erhält man eine laminare Einströmung des Abgases in die Frischluft des Mischgehäuses 7.In the exemplary embodiment, the front end or the outlet opening 2.2 of the exhaust gas recirculation pipe part 2 at an angle β beveled. In this way, a part of the exhaust gas according to Case 3 almost lossless in the main flow of fresh air introduced according to Part 18 in the mixing housing 7. Another Improvement is achieved in that the front end 2.2 as far as angled or curved, that the Longitudinal axis of the pipe part 2 in approximately parallel to Longitudinal axis of the mixing housing 7 runs. This gives you a laminar inflow of the exhaust gas into the fresh air of Mixed housing 7.

Wie aus der Zeichnung ferner hervorgeht, kann ein Teil des Abgasrückführgehäuses 2 über eine Halterung 12 zusätzlich gesichert werden. Hierzu ist die Halterung 12 mit einem U-förmigen Halterteil 14 ausgestattet, das den Außenumfang des Abgasrückführrohrteils 2 teilweise umgibt. Bei 15 kann die Halterung 2 mit dem Rohrteil 2 verlötet oder auf andere Weise fest verbunden sein. Das andere bzw. zweite Ende der Halterung 12 ist mittels eines in der Zeichnung nicht dargestellten Befestigungsbolzens an eine Bohrung 13 angeschlossen, die über eine Lasche 13.1 an das Wandteil 7.2 angeschlossen ist. As can also be seen from the drawing, a part of the Exhaust gas recirculation housing 2 via a bracket 12 in addition be secured. For this purpose, the holder 12 with a U-shaped Holder part 14, which is the outer circumference of Part of the exhaust gas recirculation pipe part 2 surrounds. At 15, the Bracket 2 with the pipe part 2 soldered or otherwise be firmly connected. The other or second end of the Holder 12 is not by means of a drawing illustrated fastening bolt to a bore 13th connected, which via a tab 13.1 to the wall part 7.2 connected.

Der in der Zeichnung dargestellte Winkel β kann ebenfalls so groß sein wie der Winkel α. Im Ausführungsbeispiel ist der Winkel β in etwa 15° groß. The angle β shown in the drawing can also be so be big like the angle α. In the embodiment, the Angle β in about 15 °.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
AbgasrückführrohrExhaust gas recirculation pipe
22
AbgasrückführrohrteilExhaust gas recirculation pipe part
2.12.1
Rohrstutzenpipe socket
2.22.2
Auslassöffnungoutlet
33
Abgasexhaust
44
Hülseshell
55
Dichtungsring, O-RingSealing ring, O-ring
66
Rohrteil im Bereich der EinlassöffnungPipe part in the area of the inlet opening
77
Mischgehäuse, MischrohrMixing housing, mixing tube
7.17.1
Wand, MischgehäuseWall, mixing housing
7.27.2
Wand, MischgehäuseWall, mixing housing
88th
Radius R2Radius R2
99
Radius R3Radius R3
1010
größeres Rohrteil, Klemmteillarger pipe part, clamping part
1111
Rohrteil im Bereich der EinlassöffnungPipe part in the area of the inlet opening
1212
Halterungbracket
1313
Bohrung für einen Bolzen (nicht dargestellt)Bore for a bolt (not shown)
13.113.1
Lascheflap
1414
Aufnahmeteil, U-förmig ausgebildetReceiving part, U-shaped
1515
Lötverbindung für Halter 12 (bei)Solder connection for holder 12 (at)
1616
Hülseshell
1717
Rohrstutzenpipe socket
1818
Frischluftfresh air
1919
konischer Spaltconical gap
2020
zylindrische Ausdrehungcylindrical bore
2121
konisches Teilconical part
2222
Mittelachsecentral axis

Claims (5)

  1. Device for sealing a pipe part (2) of an exhaust gas return line comprising a sleeve (4) which is received in a wall part (7.2) of an exhaust gas return line (7) and has a first pipe part (6) which is rigidly connected to the pipe part (2) and configured cylindrically, at least in the leading region, the pipe part (6) being adjoined by a second pipe part (10), which is larger in diameter and has a second cylindrical pipe part (11) in the region of its end, serving as a support face for an annular seal (5) which is received in a pipe socket (17), characterised in that provided between the first and second pipe part (6, 11) is a conically widening clamp part (10) which, with its surface, comes to rest against the conically widening pipe socket (17) by insertion into the pipe socket (17) and a clamp connection acting as a friction-type connection is therefore formed.
  2. Device according to claim 1, characterised in that, between the centre line (22) of the pipe part (6) and the bevel (20) of the conically widening clamp part (10) acting as a friction-type connection, an angle α is enclosed, which is between 7° and 15°, in particular between 8° and 12°, in size.
  3. Device according to any one of the preceding claims, characterised in that the exhaust gas return pipe part (2) is clamped into a pipe socket (17) provided in a mixing housing (7), the pipe socket having a hole with a cylindrical turning (20) and a conical part (21) adjacent thereto, the side part of which encloses an angle with the centre line (22), which is the same, slightly smaller or slightly larger than the angle α.
  4. Device according to any one of the preceding claims, characterised in that the pipe socket (2.1) extending into the mixing housing (7) is bevelled in such a way that its outlet aperture (2.2) extends in the flow direction (18) of the fresh air.
  5. Device according to any one of the preceding claims, characterised in that the exhaust gas return pipe part (2) is connected to a part of the mixing housing (7) by means of a holder (12).
EP03014910A 2002-07-23 2003-07-01 Sealing device for an exhaust gas pipe Expired - Fee Related EP1384867B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10233361A DE10233361A1 (en) 2002-07-23 2002-07-23 Device for sealing an exhaust pipe
DE10233361 2002-07-23

Publications (2)

Publication Number Publication Date
EP1384867A1 EP1384867A1 (en) 2004-01-28
EP1384867B1 true EP1384867B1 (en) 2005-01-26

Family

ID=29796515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03014910A Expired - Fee Related EP1384867B1 (en) 2002-07-23 2003-07-01 Sealing device for an exhaust gas pipe

Country Status (2)

Country Link
EP (1) EP1384867B1 (en)
DE (2) DE10233361A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2245284A4 (en) * 2008-01-24 2015-08-12 Mack Trucks Exhaust gas recirculation mixer device
JP5306039B2 (en) * 2009-04-28 2013-10-02 日野自動車株式会社 EGR gas mixing device
CN101598079A (en) * 2009-07-21 2009-12-09 重庆隆鑫机车有限公司 Motorcycle engine
CN102392726A (en) * 2011-11-30 2012-03-28 重庆长安汽车股份有限公司 Reinforced member for longitudinally-arranged engine exhaust manifolds
FR3001262A1 (en) * 2013-01-23 2014-07-25 Renault Sa "ARRANGEMENT FOR THE CONNECTION OF AN EXHAUST GAS RECIRCULATION DRIVE WITH AN INTERNAL COMBUSTION ENGINE INTAKE CIRCUIT"
FR3022945B1 (en) * 2014-06-25 2016-08-12 Valeo Systemes Thermiques EXHAUST GAS RECIRCULATION SYSTEM.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2706976B1 (en) * 1993-06-25 1995-10-20 Solvay
US5492104A (en) * 1994-11-03 1996-02-20 General Motors Corporation Exhaust gas recirculation for an internal combustion engine
JPH0968118A (en) * 1995-08-29 1997-03-11 Mitsubishi Eng Plast Kk Exhaust gas recirculation device for intake manifold made of resin
GB2324338B (en) * 1996-09-18 1999-05-19 Nissan Motor Exhaust gas recirculation system having a plastic intake passage
DE20014711U1 (en) * 2000-08-25 2000-11-23 Mann & Hummel Filter Device for recirculating gas on an internal combustion engine

Also Published As

Publication number Publication date
DE10233361A1 (en) 2004-02-05
DE50300274D1 (en) 2005-03-03
EP1384867A1 (en) 2004-01-28

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