WO2007059850A1 - Double-walled funnel for an exhaust system - Google Patents

Double-walled funnel for an exhaust system Download PDF

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Publication number
WO2007059850A1
WO2007059850A1 PCT/EP2006/010428 EP2006010428W WO2007059850A1 WO 2007059850 A1 WO2007059850 A1 WO 2007059850A1 EP 2006010428 W EP2006010428 W EP 2006010428W WO 2007059850 A1 WO2007059850 A1 WO 2007059850A1
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WO
WIPO (PCT)
Prior art keywords
double
insulating material
shell
walled
funnel
Prior art date
Application number
PCT/EP2006/010428
Other languages
German (de)
French (fr)
Inventor
Erich Forster
Otto Steinhauser
Original Assignee
Emcon Technologies Germany (Augsburg) Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Emcon Technologies Germany (Augsburg) Gmbh filed Critical Emcon Technologies Germany (Augsburg) Gmbh
Publication of WO2007059850A1 publication Critical patent/WO2007059850A1/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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • F01N13/1894—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells the parts being assembled in longitudinal direction
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/10—Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations
    • 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
    • F01N2310/00—Selection of sound absorbing or insulating material
    • 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
    • F01N2310/00—Selection of sound absorbing or insulating material
    • F01N2310/14—Wire mesh fabric, woven glass cloth 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
    • F01N2530/00—Selection of materials for tubes, chambers or housings
    • F01N2530/26—Multi-layered walls

Definitions

  • the invention relates to a double-walled funnel for an exhaust system.
  • Such a funnel serves to either expand or reduce the flow area from one component of the exhaust system to another.
  • the funnel When the funnel is used as an inlet funnel, for example, it serves to connect the upstream end of a particulate filter or a catalyst to an exhaust pipe.
  • the funnel When the funnel is used as an outlet funnel, it serves to connect the downstream end of the particulate filter or catalyst to an exhaust pipe. Double-walled, such a funnel is performed where a good thermal insulation is required, for example, to quickly bring the adjoining the funnel component to a high operating temperature.
  • Double-walled funnels usually consist of an inner shell and an outer shell. Between the two shells there is an insulating material.
  • the two shells are usually only one
  • the object of the invention is to provide a double-walled funnel, which offers both a good thermal insulation and avoids the occurrence of mechanical stresses between the two shells of the funnel.
  • a double-walled funnel for an exhaust system according to the invention, with an inner shell and a Outer shell, which are firmly connected to each other at their smaller ends and supported at their larger ends by means of a sliding seat, wherein between the two shells an insulating material is arranged and the end portion of a shell at the larger end is bent so that it, viewed in the axial direction covering the end portion of the other shell.
  • the bent end of a shell ensures that the exhaust stream can not act on the gap between the two shells, so that the insulating material from the space between the two shells can not or only to a small extent can be washed out.
  • Labyrinth seal is formed.
  • a labyrinth seal reduces even more the risk of insulating material being washed out of the space between the two shells.
  • the end portion of the inner shell is bent outwards. This is advantageous because then the gap between the inner shell and the outer shell is rather on the outside, so facing away from the flowing exhaust gas.
  • a sealing ring is arranged between the insulating material and the end portions of the two shells.
  • the sealing ring which may for example consist of a wire mesh, includes the insulating material mechanically, so that the risk of leaching of the insulating material is further reduced.
  • the insulating material used is powdery.
  • the insulating material may be a fibrous material which may be in bulk form or as a fiber mat.
  • FIG. 1 is a schematic side view of a section of a
  • FIG. 2 in a schematic sectional view enlarges the region II of FIG. 1.
  • FIG. 1 shows a part of an exhaust system with a first exhaust pipe 10, an inlet funnel 12, a component 14 and an outlet funnel 16.
  • the exhaust gas flows in the direction of the arrow P from the exhaust pipe 10 to the component 14 and leaves it through the outlet funnel 16 toward another exhaust pipe (not shown) or alternatively to another component of the exhaust system.
  • the component 14 may be any component, for example a particle filter or a catalyst.
  • the inlet funnel 12 is double-walled; it has an outer shell 18 (see FIG. 2) and an inner shell 20.
  • a housing 22 of the component 14 is connected, for example by means of a weld.
  • a substrate 26 is arranged by means of a bearing mat 24. If a metal body is used as the substrate 26 instead of a ceramic monolith, the bearing mat 24 can be dispensed with.
  • the outer shell 18 and the inner shell 20 are fixedly connected to one another at their smaller end, that is to say the end facing the exhaust pipe 10.
  • the inner shell 20 is mounted by means of a sliding seat 28 in the outer shell 18.
  • the end portion 30 of the inner shell 20 is bent to the outside, so that viewed in the axial direction, the gap between the inner shell 20 and the outer shell 18 is covered.
  • a labyrinth seal is formed, since the path from the interior of the housing 22 to the space between the outer shell 18 and the inner shell 20 first around the outwardly bent end portion 30 around, then between the end portion 32 of the outer shell 18 and the end portion 30 of the inner shell 20 therethrough and then passes through the narrow gap of the sliding seat 28.
  • the various gaps in conjunction with the required change in direction, ensure the sealing effect of a labyrinth seal.
  • an insulating material 34 is arranged, which here highly dispersed (pyrogenic) silica , ,
  • the space in which the insulating material 34 is arranged is completed by a sealing ring 36 made of wire mesh. This keeps the powdered insulating material 34 enclosed in its space, while additionally the labyrinth seal ensures that the sealing ring is not acted upon by the exhaust gas flowing through the funnel 12 into the housing 22.
  • the sealing ring 36 can be dispensed with.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

A double-walled funnel (12, 16) for an exhaust system has an inner shell (20) and an outer shell (18) which are firmly connected to one another at their smaller ends and are mounted on one another at their larger ends by means of a sliding fit (28), wherein an insulating material (34) is arranged between the two shells (18, 20), and the end section (30, 32) of one shell (18, 20) is bent at the larger end in such a way that, as viewed in the axial direction, it covers the end section (32, 30) of the other shell (20, 18).

Description

Doppelwandiger Trichter für eine Auspuffanlage Double-walled funnel for an exhaust system
Die Erfindung betrifft einen doppelwandigen Trichter für eine Auspuffanlage.The invention relates to a double-walled funnel for an exhaust system.
Ein solcher Trichter dient dazu, den Strömungsquerschnitt von einem Bauteil der Abgasanlage zu einem anderen entweder aufzuweiten oder zu verringern. Wenn der Trichter als Einlaßtrichter verwendet wird, dient er beispielsweise dazu, das stromaufwärtige Ende eines Partikelfilters oder eines Katalysators an ein Abgasrohr anzuschließen. Wenn der Trichter als Auslaßtrichter verwendet wird, dient er dazu, das stromabwärtige Ende des Partikelfilters oder Katalysators an ein Abgasrohr anzuschließen. Doppelwandig wird ein solcher Trichter dort ausgeführt, wo eine gute Wärmeisolation erforderlich ist, beispielsweise um das sich an den Trichter anschließende Bauteil schnell auf eine hohe Betriebstemperatur zu bringen.Such a funnel serves to either expand or reduce the flow area from one component of the exhaust system to another. When the funnel is used as an inlet funnel, for example, it serves to connect the upstream end of a particulate filter or a catalyst to an exhaust pipe. When the funnel is used as an outlet funnel, it serves to connect the downstream end of the particulate filter or catalyst to an exhaust pipe. Double-walled, such a funnel is performed where a good thermal insulation is required, for example, to quickly bring the adjoining the funnel component to a high operating temperature.
Doppelwandige Trichter bestehen üblicherweise aus einer Innenschale und einer Außenschale. Zwischen den beiden Schalen befindet sich ein isolierendesDouble-walled funnels usually consist of an inner shell and an outer shell. Between the two shells there is an insulating
Medium, beispielsweise Luft. Um Spannungen aufgrund von unterschiedlichenMedium, for example air. To tension due to different
Wärmedehnungen zu verhindern, sind die beiden Schalen meist nur an einemTo prevent thermal expansion, the two shells are usually only one
Ende fest miteinander verbunden; am anderen Ende können sich die Schalen relativ zueinander verschieben. Ein solcher Schiebesitz ist jedoch dann nachteilig, wenn zwischen den beiden Schalen ein Isoliermaterial eingeschlossen werden soll, welches dazu neigt, sich zu verflüchtigen. Aufgrund des bisher üblichen Schiebesitzes zwischen der Innenschale und der Außenschale kann nämlich nicht verhindert werden, daß ein Teil des Abgasstromes in den Raum zwischen der Innenschale und der Außenschale eindringt und das dort angeordnete Isoliermaterial auswäscht.End firmly connected; At the other end, the shells can move relative to each other. However, such a sliding seat is disadvantageous if an insulating material is to be enclosed between the two shells, which tends to volatilize. Because of the usual sliding seat between the inner shell and the outer shell namely can not be prevented that a portion of the exhaust gas stream penetrates into the space between the inner shell and the outer shell and washes there arranged insulating material.
Die Aufgabe der Erfindung besteht darin, einen doppelwandigen Trichter zu schaffen, der sowohl eine gute thermische Isolation bietet als auch das Auftreten von mechanischen Spannungen zwischen den beiden Schalen des Trichters vermeidet.The object of the invention is to provide a double-walled funnel, which offers both a good thermal insulation and avoids the occurrence of mechanical stresses between the two shells of the funnel.
Zur Lösung dieser Aufgabe ist erfindungsgemäß ein doppelwandiger Trichter für eine Auspuffanlage vorgesehen, mit einer Innenschale und einer Außenschale, die an ihren kleineren Enden fest miteinander verbunden und an ihren größeren Enden mittels eines Schiebesitzes aneinander gelagert sind, wobei zwischen den beiden Schalen ein Isoliermaterial angeordnet ist und der Endabschnitt einer Schale am größeren Ende so abgebogen ist, daß er, in axialer Richtung betrachtet, den Endabschnitt der anderen Schale überdeckt. Das abgebogene Ende der einen Schale sorgt dafür, daß der Abgasstrom den Spalt zwischen den beiden Schalen nicht beaufschlagen kann, so daß das Isoliermaterial aus dem Raum zwischen den beiden Schalen nicht oder nur in sehr geringem Umfang ausgewaschen werden kann.To solve this problem, a double-walled funnel is provided for an exhaust system according to the invention, with an inner shell and a Outer shell, which are firmly connected to each other at their smaller ends and supported at their larger ends by means of a sliding seat, wherein between the two shells an insulating material is arranged and the end portion of a shell at the larger end is bent so that it, viewed in the axial direction covering the end portion of the other shell. The bent end of a shell ensures that the exhaust stream can not act on the gap between the two shells, so that the insulating material from the space between the two shells can not or only to a small extent can be washed out.
Vorzugsweise ist vorgesehen, daß zwischen den beiden Endabschnitten eineIt is preferably provided that between the two end portions
Labyrinthdichtung gebildet ist. Eine Labyrinthdichtung verringert noch stärker das Risiko, daß Isoliermaterial aus dem Raum zwischen den beiden Schalen ausgewaschen wird.Labyrinth seal is formed. A labyrinth seal reduces even more the risk of insulating material being washed out of the space between the two shells.
Vorzugsweise ist vorgesehen, daß der Endabschnitt der Innenschale nach außen aufgebogen ist. Dies ist vorteilhaft, weil dann der Spalt zwischen der Innenschale und der Außenschale eher auf der Außenseite liegt, also abgewandt vom strömenden Abgas.It is preferably provided that the end portion of the inner shell is bent outwards. This is advantageous because then the gap between the inner shell and the outer shell is rather on the outside, so facing away from the flowing exhaust gas.
Vorzugsweise ist vorgesehen, daß zwischen dem Isoliermaterial und den Endabschnitten der beiden Schalen ein Dichtring angeordnet ist. Der Dichtring, der beispielsweise aus einem Drahtgestrick bestehen kann, schließt das Isoliermaterial mechanisch ein, so daß das Risiko eines Auswaschens des Isoliermaterials noch weiter verringert ist.It is preferably provided that a sealing ring is arranged between the insulating material and the end portions of the two shells. The sealing ring, which may for example consist of a wire mesh, includes the insulating material mechanically, so that the risk of leaching of the insulating material is further reduced.
Vorzugsweise ist das verwendete Isoliermaterial pulverförmig.Preferably, the insulating material used is powdery.
Insbesondere ist als Isoliermaterial hochdisperse (pyrogene) Kieselsäure geeignet, da sie eine sehr geringe Wärmeleitfähigkeit hat.In particular, is highly suitable as insulating highly fumed (pyrogenic) silica, since it has a very low thermal conductivity.
Alternativ kann es sich bei dem Isoliermaterial um ein Fasermaterial handeln, das in loser Form oder als Fasermatte vorliegen kann.Alternatively, the insulating material may be a fibrous material which may be in bulk form or as a fiber mat.
Die Erfindung wird nachfolgend anhand einer Ausführungsform beschrieben, die in den beigefügten Zeichnungen dargestellt ist. In diesen zeigen:The invention will be described below with reference to an embodiment shown in the accompanying drawings. In these show:
- Figur 1 in einer schematischen Seitenansicht einen Ausschnitt aus einer- Figure 1 is a schematic side view of a section of a
Auspuffanlage; und - Figur 2 in einer schematischen Schnittansicht vergrößert den Bereich Il von Figur 1.Exhaust system; and FIG. 2 in a schematic sectional view enlarges the region II of FIG. 1.
In Figur 1 ist ein Teil einer Abgasanlage mit einem ersten Abgasrohr 10, einem Einlaßtrichter 12, einem Bauteil 14 und einem Auslaßtrichter 16 gezeigt. Das Abgas strömt in der Richtung des Pfeils P vom Abgasrohr 10 zum Bauteil 14 und verläßt dieses durch den Auslaßtrichter 16 hin zu einem weiteren (nicht gezeigten) Abgasrohr oder alternativ zu einem anderen Bauteil der Abgasanlage. Beim Bauteil 14 kann es sich um ein beliebiges Bauteil handeln, beispielsweise einen Partikelfilter oder einen Katalysator.FIG. 1 shows a part of an exhaust system with a first exhaust pipe 10, an inlet funnel 12, a component 14 and an outlet funnel 16. The exhaust gas flows in the direction of the arrow P from the exhaust pipe 10 to the component 14 and leaves it through the outlet funnel 16 toward another exhaust pipe (not shown) or alternatively to another component of the exhaust system. The component 14 may be any component, for example a particle filter or a catalyst.
Von den beiden Trichtern ist hier mindestens der Einlaßtrichter 12 doppel- wandig ausgeführt; er weist eine Außenschale 18 (siehe Figur 2) und eine Innenschale 20 auf. Mit der Außenschale 18 ist ein Gehäuse 22 des Bauteils 14 verbunden, beispielsweise mittels einer Schweißnaht. Im Inneren des Gehäuses 22 ist mittels einer Lagermatte 24 ein Substrat 26 angeordnet. Kommt als Substrat 26 anstelle eines Keramik-Monolithen ein Metallkörper zum Einsatz, kann auf die Lagermatte 24 verzichtet werden.Of the two funnels here at least the inlet funnel 12 is double-walled; it has an outer shell 18 (see FIG. 2) and an inner shell 20. With the outer shell 18, a housing 22 of the component 14 is connected, for example by means of a weld. Inside the housing 22, a substrate 26 is arranged by means of a bearing mat 24. If a metal body is used as the substrate 26 instead of a ceramic monolith, the bearing mat 24 can be dispensed with.
Die Außenschale 18 und die Innenschale 20 sind an ihrem kleineren Ende, also dem dem Abgasrohr 10 zugewandten Ende, fest miteinander verbunden. An ihrem größeren Ende, also dem im Gehäuse 22 angeordneten Ende, ist die Innenschale 20 mittels eines Schiebesitzes 28 in der Außenschale 18 gelagert. Außerdem ist der Endabschnitt 30 der Innenschale 20 nach außen umgebogen, so daß in axialer Richtung betrachtet der Spalt zwischen der Innenschale 20 und der Außenschale 18 abgedeckt ist. Gleichzeitig ist eine Labyrinthdichtung gebildet, da der Weg vom Innenraum des Gehäuses 22 zum Raum zwischen der Außenschale 18 und der Innenschale 20 zunächst um den nach außen abgebogenen Endabschnitt 30 herum, dann zwischen dem Endabschnitt 32 der Außenschale 18 und dem Endabschnitt 30 der Innenschale 20 hindurch und dann durch den engen Spalt des Schiebesitzes 28 hindurchführt. Die verschiedenen Spalte, in Verbindung mit der jeweils erforderlichen Richtungsänderung, gewährleisten die Dichtungswirkung einer Labyrinthdichtung.The outer shell 18 and the inner shell 20 are fixedly connected to one another at their smaller end, that is to say the end facing the exhaust pipe 10. At its larger end, so arranged in the housing 22 end, the inner shell 20 is mounted by means of a sliding seat 28 in the outer shell 18. In addition, the end portion 30 of the inner shell 20 is bent to the outside, so that viewed in the axial direction, the gap between the inner shell 20 and the outer shell 18 is covered. At the same time, a labyrinth seal is formed, since the path from the interior of the housing 22 to the space between the outer shell 18 and the inner shell 20 first around the outwardly bent end portion 30 around, then between the end portion 32 of the outer shell 18 and the end portion 30 of the inner shell 20 therethrough and then passes through the narrow gap of the sliding seat 28. The various gaps, in conjunction with the required change in direction, ensure the sealing effect of a labyrinth seal.
Im Raum zwischen der Außenschale 18 und der Innenschale 20 ist ein Isoliermaterial 34 angeordnet, welches hier hochdisperse (pyrogene) Kieselsäure . .In the space between the outer shell 18 and the inner shell 20, an insulating material 34 is arranged, which here highly dispersed (pyrogenic) silica , ,
ist. Der Raum, in welchem das Isoliermaterial 34 angeordnet ist, wird abgeschlossen von einem Dichtring 36 aus Drahtgestrick. Dieser hält das pulver- förmige Isoliermaterial 34 in seinem Raum eingeschlossen, während zusätzlich die Labyrinthdichtung dafür sorgt, daß der Dichtring nicht von dem durch den Trichter 12 in das Gehäuse 22 strömenden Abgas beaufschlagt wird.is. The space in which the insulating material 34 is arranged is completed by a sealing ring 36 made of wire mesh. This keeps the powdered insulating material 34 enclosed in its space, while additionally the labyrinth seal ensures that the sealing ring is not acted upon by the exhaust gas flowing through the funnel 12 into the housing 22.
Wird anstelle eines pulverförmigen Isoliermaterials Fasermaterial zur Isolierung verwendet, kann der Dichtring 36 entfallen. If fiber material is used instead of a powdery insulating material for insulation, the sealing ring 36 can be dispensed with.
Bezugszeichenliste:LIST OF REFERENCE NUMBERS
10: Abgasrohr10: exhaust pipe
12: Einlaßtrichter12: inlet funnel
14: Abgasanlagen-Bauteil 16: Auslaßtrichter14: exhaust system component 16: outlet funnel
18: Außenschale18: outer shell
20: Innenschale20: inner shell
22: Gehäuse22: housing
24: Lagermatte 26: Substrat24: bearing mat 26: substrate
28: Schiebesitz28: Sliding seat
30: Endabschnitt der Innenschale30: end portion of the inner shell
32: Endabschnitt der Außenschale32: end portion of the outer shell
34: Isoliermaterial 36: Dichtring 34: insulating material 36: sealing ring

Claims

_ _Patentansprüche _ _Patent claims
1. Doppelwandiger Trichter (12, 16) für eine Auspuffanlage, mit einer Innenschale (20) und einer Außenschale (18), die an ihren kleineren Enden fest miteinander verbunden und an ihren größeren Enden mittels eines Schiebesitzes (28) aneinander gelagert sind, wobei zwischen den beiden Schalen (18, 20) ein Isoliermaterial (34) angeordnet ist und der Endabschnitt (30, 32) einer Schale (18, 20) am größeren Ende so abgebogen ist, daß er, in axialer Richtung betrachtet, den Endabschnitt (32, 30) der anderen Schale (20, 18) überdeckt.1. Double-walled funnel (12, 16) for an exhaust system, with an inner shell (20) and an outer shell (18), which are firmly connected at their smaller ends and at their larger ends by means of a sliding seat (28) are mounted together between the two shells (18, 20) an insulating material (34) is arranged and the end portion (30, 32) of a shell (18, 20) at the larger end is bent so that, viewed in the axial direction, the end portion (32 , 30) of the other shell (20, 18).
2. Doppelwandiger Trichter nach Anspruch 1 , dadurch gekennzeichnet, daß zwischen den beiden Endabschnitten (30, 32) eine Labyrinthdichtung gebildet ist.2. Double-walled hopper according to claim 1, characterized in that between the two end portions (30, 32) a labyrinth seal is formed.
3. Doppelwandiger Trichter nach Anspruch 2, dadurch gekennzeichnet, daß der Endabschnitt (30) der Innenschale (20) nach außen aufgebogen ist.3. Double-walled hopper according to claim 2, characterized in that the end portion (30) of the inner shell (20) is bent outwards.
4. Doppelwandiger Trichter nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwischen dem Isoliermaterial (34) und den Endabschnitten (30, 32) der beiden Schalen (18, 20) ein Dichtring (36) angeordnet ist.4. Double-walled hopper according to one of the preceding claims, characterized in that between the insulating material (34) and the end portions (30, 32) of the two shells (18, 20), a sealing ring (36) is arranged.
5. Doppelwandiger Trichter nach Anspruch 4, dadurch gekennzeichnet, daß der Dichtring (36) aus einem Drahtgestrick besteht.5. Double-walled hopper according to claim 4, characterized in that the sealing ring (36) consists of a wire mesh.
6. Doppelwandiger Trichter nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Isoliermaterial pulverförmig ist.6. Double-walled hopper according to one of the preceding claims, characterized in that the insulating material is powdery.
7. Doppelwandiger Trichter nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Isoliermaterial (34) hochdisperse (pyrogene) Kieselsäure ist.7. Double-walled hopper according to one of the preceding claims, characterized in that the insulating material (34) is highly dispersed (pyrogenic) silica.
8. Doppelwandiger Trichter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Isoliermaterial ein Fasermaterial ist. 8. Double-walled hopper according to one of claims 1 to 5, characterized in that the insulating material is a fiber material.
PCT/EP2006/010428 2005-11-25 2006-10-30 Double-walled funnel for an exhaust system WO2007059850A1 (en)

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DE200510056358 DE102005056358A1 (en) 2005-11-25 2005-11-25 Double-walled funnel for an exhaust system
DE102005056358.9 2005-11-25

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2946085A1 (en) * 2009-06-02 2010-12-03 Peugeot Citroen Automobiles Sa Particle filter for exhaust line of diesel type internal combustion engine of vehicle, has ceramic active part placed in envelope, and ceramic protection device placed at outlet of active part for protecting envelope
CN104024593A (en) * 2012-01-04 2014-09-03 天纳克汽车工业公司 Fully insulated exhaust treatment device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0176722A1 (en) * 1984-09-01 1986-04-09 Leistritz Aktiengesellschaft Catalytic exhaust gas detoxication device
DE19711789A1 (en) * 1997-03-21 1998-10-01 Zeuna Staerker Kg Manufacture of exhaust gas purification unit containing e.g. catalyst and comprising cylindrical section with double end cone transitions
EP1149992A1 (en) * 2000-04-26 2001-10-31 J. Eberspächer GmbH & Co. Exhaust assembly for an exhaust gas system, especially exhaust gas catalyst of modular construction for a motor vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0176722A1 (en) * 1984-09-01 1986-04-09 Leistritz Aktiengesellschaft Catalytic exhaust gas detoxication device
DE19711789A1 (en) * 1997-03-21 1998-10-01 Zeuna Staerker Kg Manufacture of exhaust gas purification unit containing e.g. catalyst and comprising cylindrical section with double end cone transitions
EP1149992A1 (en) * 2000-04-26 2001-10-31 J. Eberspächer GmbH & Co. Exhaust assembly for an exhaust gas system, especially exhaust gas catalyst of modular construction for a motor vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2946085A1 (en) * 2009-06-02 2010-12-03 Peugeot Citroen Automobiles Sa Particle filter for exhaust line of diesel type internal combustion engine of vehicle, has ceramic active part placed in envelope, and ceramic protection device placed at outlet of active part for protecting envelope
CN104024593A (en) * 2012-01-04 2014-09-03 天纳克汽车工业公司 Fully insulated exhaust treatment device

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