EP0334168A1 - Exhaust device for motor vehicles - Google Patents

Exhaust device for motor vehicles Download PDF

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Publication number
EP0334168A1
EP0334168A1 EP89104504A EP89104504A EP0334168A1 EP 0334168 A1 EP0334168 A1 EP 0334168A1 EP 89104504 A EP89104504 A EP 89104504A EP 89104504 A EP89104504 A EP 89104504A EP 0334168 A1 EP0334168 A1 EP 0334168A1
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EP
European Patent Office
Prior art keywords
metal jacket
sheet metal
exhaust system
sheet
exhaust
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Granted
Application number
EP89104504A
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German (de)
French (fr)
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EP0334168B1 (en
Inventor
Georg Dipl.-Ing. Reuther
Harald Dipl.-Ing. Bressler
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Tenneco GmbH
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Heinrich Gillet GmbH
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Publication of EP0334168A1 publication Critical patent/EP0334168A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—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

Definitions

  • the invention relates to an exhaust system for motor vehicles according to the preamble of claim 1.
  • an insulating layer made of mineral wool or ceramic fleece, etc. is placed on top, which is covered, held and protected on the outside by a sheet metal jacket.
  • the ends of the sheet metal jacket are either connected on both sides or - if significant thermal expansion differences between the exhaust system and sheet metal jacket are to be expected - on one side with the exhaust system by means of several tack welding spots (DE-A-25 52 647).
  • the low durability of the usual welded joints has several reasons.
  • the different material thickness of the exhaust system usually about 2 mm
  • the sheet metal jacket usually only 0.5 mm
  • the sheets mostly consist of different materials, eg. B. stainless steel for the exhaust system and mild steel for the sheet metal jacket, and are often covered with an aluminum layer as corrosion protection.
  • the sheet metal jacket always executes such relative movements on the loose side.
  • the above-mentioned DE-A-25 52 647 therefore proposes to reinforce the exhaust pipe by several plugged and welded pipe pieces, the free end of the sheet metal jacket by an internally welded metal ring.
  • the metal ring should slide over the pipe sections according to the difference in thermal expansion. If there is little play in the reinforcement ring compared to the pipe sections, corrosion, dirt and thermal expansion will quickly block its ability to move. If there is sufficient play in the reinforcement ring, water and dirt cannot be prevented from penetrating.
  • the present invention has for its object to improve the connections between the exhaust system and the sheet metal jacket in every respect.
  • Embodiments of the invention in the area of the fixed bearing with material reinforcement are the subject of dependent claims 2 to 4.
  • Embodiments of the invention in the area of the floating bearing are the subject of subclaims 5 to 7, subclaims 6 and 7 show solutions which limit the longitudinal movements of the free end of the sheet metal jacket, caused by thermal expansion differences, by engine vibrations, by exhaust gas pulsations, etc.
  • a housing 1 for example a muffler or catalytic converter, which is connected to exhaust pipes 2 on the inlet and outlet sides.
  • the Gezzasue 1 is surrounded by an insulating shell, which consists of an insulating layer 3 and a thin sheet metal jacket 4.
  • the mechanical connection between the sheet metal jacket 4 and the exhaust pipes 2 of the exhaust system is made on the left side by a fixed bearing 6, on the right side by a floating bearing 7.
  • the floating bearing 7 allows the stress-free compensation of thermal expansion differences between the housing 1 and the sheet metal jacket 4.
  • the connection between the sheet metal jacket 4 and the exhaust gas-carrying pipe 2 is established by a clamping ring 8.5, which presses the end of the sheet metal jacket 4 into a circumferential bead 2.1.
  • the ends 8.6 of the clamping ring 8.5 can be welded together to increase the fatigue strength.
  • Such a connection is almost as tight and stable as a welded connection, but can be established more quickly.
  • the known problems with welded joints - structural changes, low mechanical strength, increased Susceptibility to corrosion - do not occur.
  • Fig. 2 shows this connection in cross section.
  • a labyrinth-like gap seal was realized with the aid of a sleeve ring 9.1, which is welded to the exhaust pipe 2 on one side. Clamping is also possible.
  • the sleeve ring 9.1 overlaps the end 4.1 of the sheet metal jacket 4. This connection is largely protected against the ingress of moisture and dirt and against the escape of insulating material 3. Furthermore, no rattling noises can occur. Dynamic relative movements between the housing 1 and the sheet metal jacket 4 are reduced to a minimum, so that a long service life of the same can be expected even when using insulating material 3 of low mechanical strength.
  • Fig. 3 shows on the side of the fixed bearing 6 a variant of the mechanical connection without welding.
  • a circumferential bead 2.1 is introduced into the exhaust pipe 2.
  • a sleeve 8.2 is placed over the end of the sheet metal jacket 4 and pressed into the surrounding bead 2.1.
  • the sliding sleeve 9.1 carries a circumferential groove 9.2 into which the end 4.2 of the sheet metal jacket 4, which is bent outwards, engages. This limits the free mobility of the end 4.2 of the metal jacket 4 in both directions; the sheet metal jacket 4 remains securely held in the sleeve ring 9.1 even under extreme loads.
  • Fig. 4 in longitudinal section and Fig. 5 in cross section show a third embodiment for a fixed bearing 6.
  • the end of the sheet metal jacket 4 is here with the help of a wide clamping ring 8.7 attached to the exhaust pipe 2, the mechanical tension being introduced into the clamping ring 8.7 by forming beaded ears 8.8.

Abstract

In exhaust devices, consisting of housings (1) and/or pipes (2) carrying exhaust gases, parts must, if necessary, be surrounded by an insulating shell consisting of insulating material (3), generally mineral wool, and a sheet-metal jacket (4). The connection between the sheet-metal jacket (4) and the housings (1) or pipes (2) is made on the one side as a fixed bearing (6) and on the other side as a loose bearing (7). In the region of the fixed bearing (6), a clamping ring (8.5) presses the end of the sheet-metal jacket (4) into a circumferential bead (2.1) in the pipe (2). In the region of the loose bearing (7), a sliding collar (9.1) (which is welded on one side to the pipe (2) carrying exhaust gases) overhangs the end (4.1) of the sheet-metal jacket (4). In this way, the connecting points (6, 7) between the sheet-metal jacket (4) and the exhaust device (1, 2) are sealed against the penetration of dirt and moisture and against insulating material (3) emerging. Relative movements between the sheet-metal jacket (4) and the housing (1), caused by engine vibration, pulsations of the exhaust gas and unevennesses in the roadway, are reduced to a minimum. The service life of the insulating material (3) is increased. Thermally dependent expansion differences between the sheet-metal jacket (4) and the exhaust device (1, 2) are compensated for without problems. <IMAGE>

Description

Die Erfindung betrifft eine Abgasanlage für Kraftfahrzeuge gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an exhaust system for motor vehicles according to the preamble of claim 1.

In bestimmten Fällen ist es erforderlich und üblich, Teile der Abgasanlage, beispielsweise Töpfe, Katalysatorgehäuse, Rohre und dergleichen, thermisch zu isolieren. Hierzu wird zunächst eine Isolierschicht aus Mineralwolle oder keramischem Vlies etc., aufgelegt, die außen von einem Blechmantel umhüllt, gehalten und geschützt wird. Die Enden des Blechmantels werden entweder beidseitig oder - wenn erhebliche thermische Ausdehnungsdifferenzen zwischen Abgasanlage und Blechmantel zu erwarten sind - einseitig mit der Abgasanlage durch mehrere Heftschweißpunkte verbunden (DE-A-25 52 647).In certain cases, it is necessary and customary to thermally insulate parts of the exhaust system, for example pots, catalytic converter housings, pipes and the like. For this purpose, an insulating layer made of mineral wool or ceramic fleece, etc. is placed on top, which is covered, held and protected on the outside by a sheet metal jacket. The ends of the sheet metal jacket are either connected on both sides or - if significant thermal expansion differences between the exhaust system and sheet metal jacket are to be expected - on one side with the exhaust system by means of several tack welding spots (DE-A-25 52 647).

Die Erfahrung zeigt, daß diese Schweißstellen sehr schnell zerstört werden, so daß der Blechmantel sich frei gegenüber der Isolierschicht und der Abgasanlage bewegen kann.Experience shows that these welds are destroyed very quickly, so that the sheet metal jacket can move freely relative to the insulating layer and the exhaust system.

Die geringe Haltbarkeit der üblichen Schweißverbindungen hat mehrere Gründe. Hier ist einmal zu nennen die unterschiedliche Materialdicke der Abgasanlage, meist ca. 2 mm, und des Blechmantels, meist nur 0,5 mm, ferner die Tatsache, daß die Bleche meist aus unterschiedlichen Materialien bestehen, z. B. Edelstahl für die Abgasanlage und Normalstahl für den Blechmantel, und oft noch mit einer Aluminiumschicht als Korrosionsschutz belegt sind.The low durability of the usual welded joints has several reasons. Here is to mention the different material thickness of the exhaust system, usually about 2 mm, and the sheet metal jacket, usually only 0.5 mm, further the fact that the sheets mostly consist of different materials, eg. B. stainless steel for the exhaust system and mild steel for the sheet metal jacket, and are often covered with an aluminum layer as corrosion protection.

Bedingt durch Motorschwingungen, Abgaspulsationen, Fahrbahnunebenheiten und dergleichen führt der lose Blechmantel Relativbewegungen aus gegenüber der Isolierschicht und der Abgasanlage. Zunächst wird die Isolierschicht dadurch beschädigt und verliert ihre Wirkung. Weiterhin kommt es zu nicht unerheblichen Klappergeräuschen. Außerdem können Feuchtigkeit und Schmutz in den Raum zwischen Abgasanlage und Isolationsblechmantel gelangen und unerwünschte Korrosionen auslösen.Due to engine vibrations, exhaust gas pulsations, Uneven road surfaces and the like cause the loose sheet metal jacket to make relative movements with respect to the insulating layer and the exhaust system. First, the insulating layer is damaged and loses its effect. There are also not inconsiderable rattling noises. In addition, moisture and dirt can get into the space between the exhaust system and the insulation sheet metal jacket and trigger undesirable corrosion.

Derartige Relativbewegungen führt der Blechmantel auf der losen Seite immer aus. Die oben erwähnte DE-A-25 52 647 schlägt deshalb vor, das abgasführende Rohr durch mehrere aufgesteckte und geschweißte Rohrstücke, das freie Ende des Blechmantels durch einen innen eingeschweißten Metallring zu verstärken. Der Metallring soll entsprechend der thermischen Ausdehnungsdifferenz über den Rohrstücken gleiten. Erhält der Verstärkungsring wenig Spiel gegenüber den Rohrstücken, werden Korrosion, Schmutz und Wärmedehnung seine Bewegungsfähigkeit schnell blockieren. Erhält der Verstärkungsring ausreichend Spiel, können Wasser und Schmutz nicht am Eindringen gehindert werden.The sheet metal jacket always executes such relative movements on the loose side. The above-mentioned DE-A-25 52 647 therefore proposes to reinforce the exhaust pipe by several plugged and welded pipe pieces, the free end of the sheet metal jacket by an internally welded metal ring. The metal ring should slide over the pipe sections according to the difference in thermal expansion. If there is little play in the reinforcement ring compared to the pipe sections, corrosion, dirt and thermal expansion will quickly block its ability to move. If there is sufficient play in the reinforcement ring, water and dirt cannot be prevented from penetrating.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, die Verbindungen zwischen der Abgasanlage und dem Blechmantel in jeder Beziehung zu verbessern.The present invention has for its object to improve the connections between the exhaust system and the sheet metal jacket in every respect.

Diese Aufgabe wird gelöst durch die kennzeichnenden Merkmale des Patentanspruchs 1.This object is achieved by the characterizing features of patent claim 1.

Damit ergeben sich die Vorteile, daß mögliche Relativbewegungen zwischen Blechmantel und Abgasanlage auf ein Minimum reduziert sind, wodurch die Lebensdauer des Isoliermaterials positiv beeinflußt wird, daß Klappergeräusche ganz entfallen, daß Schweißverbindungen ganz entfallen, daß auch Isoliermaterial, welches mechanisch weniger stabil ist, verwendet werden kann und vor allem, daß die Verbindung zwischen Blechschale und Abgasanlage auch auf der Seite des Loslagers aufgrund der labyrinthartigen Konstruktion praktisch dicht ist, so daß weder Wasser noch Schmutz eindringen oder die Isoliermaterialien herausfallen können.This results in the advantages that possible relative movements between the sheet metal jacket and the exhaust system are reduced to a minimum, which has a positive effect on the life of the insulating material Rattling noises are completely eliminated, that welded connections are completely eliminated, that insulating material, which is mechanically less stable, can be used and, above all, that the connection between the sheet metal shell and the exhaust system is also practically tight on the side of the floating bearing due to the labyrinthine construction, so that neither Water or dirt can penetrate or the insulation materials can fall out.

Ausgestaltungen der Erfindung im Bereich des Festlagers mit Materialverstärkung sind Gegenstand der Unteransprüche 2 bis 4.Embodiments of the invention in the area of the fixed bearing with material reinforcement are the subject of dependent claims 2 to 4.

Ausgestaltungen der Erfindung im Bereich des Loslagers sind Gegenstand der Unteransprüche 5 bis 7, wobei die Unteransprüche 6 und 7 Lösungen aufzeigen, die die Längsbewegungen des freien Endes des Blechmantels, hervorgerufen durch thermische Ausdehnungsdifferenzen, durch Motorschwingungen, durch Abgaspulsationen usw., begrenzen.Embodiments of the invention in the area of the floating bearing are the subject of subclaims 5 to 7, subclaims 6 and 7 show solutions which limit the longitudinal movements of the free end of the sheet metal jacket, caused by thermal expansion differences, by engine vibrations, by exhaust gas pulsations, etc.

Anhand der Zeichnung soll die Erfindung in Form von Ausführungsbeispielen näher erläutert werden. Es zeigen

  • Fig. 1 einen Längsschnitt durch eine erste Ausführungsform eines isolierten Schalldämpfergehäuses als Teil einer Abgasanlage für Kraftfahrzeuge,
  • Fig. 2 einen Querschnitt durch die Ausführungsform der Fig. 1 entlang der Linie II-II,
  • Fig. 3 einen Längsschnitt durch eine zweite Ausführungsform eines isolierten Schalldämpfergehäuses als Teil einer Abgasanlage für Kraftfahrzeuge,
  • Fig. 4 einen Längsschnitt durch eine dritte Ausführungsform eines isolierten Schalldämpfergehäuses als Teil einer Abgasanlage für Kraftfahrzeuge und
  • Fig. 5 einen Querschnitt durch die Ausführungsform der Fig. 4 entlang der Linie V-V.
The invention will be explained in more detail in the form of exemplary embodiments with reference to the drawing. Show it
  • 1 shows a longitudinal section through a first embodiment of an insulated silencer housing as part of an exhaust system for motor vehicles,
  • 2 shows a cross section through the embodiment of FIG. 1 along the line II-II,
  • 3 shows a longitudinal section through a second embodiment of an insulated silencer housing as part of an exhaust system for motor vehicles,
  • Fig. 4 is a longitudinal section through a third embodiment of an insulated silencer housing as part of an exhaust system for motor vehicles and
  • Fig. 5 shows a cross section through the embodiment of Fig. 4 along the line VV.

In Fig. 1 erkennt man einen Längsschnitt durch ein Gehäuse 1, beispielsweise eines Schalldämpfers oder Katalysators, welches mit abgasführenden Rohren 2 eingangsseitig und ausgangsseitig verbunden ist. Das Gehäsue 1 ist mit einer Isolierschale umgeben, die aus einer Isolierschicht 3 und einem dünnen Blechmantel 4 besteht.1 shows a longitudinal section through a housing 1, for example a muffler or catalytic converter, which is connected to exhaust pipes 2 on the inlet and outlet sides. The Gehäsue 1 is surrounded by an insulating shell, which consists of an insulating layer 3 and a thin sheet metal jacket 4.

Die mechanische Verbindung zwischen Blechmantel 4 und den abgasführenden Rohren 2 der Abgasanlage erfolgt auf der linken Seite durch ein Festlager 6, auf der rechten Seite durch ein Loslager 7. Das Loslager 7 erlaubt den spannungsfreien Ausgleich von thermisch bedingten Ausdehnungsunterschieden zwischen Gehäuse 1 und Blechmantel 4.The mechanical connection between the sheet metal jacket 4 and the exhaust pipes 2 of the exhaust system is made on the left side by a fixed bearing 6, on the right side by a floating bearing 7. The floating bearing 7 allows the stress-free compensation of thermal expansion differences between the housing 1 and the sheet metal jacket 4.

Im Bereich des Festlagers 6 wird die Verbindung zwischen Blechmantel 4 und abgasführendem Rohr 2 durch einen Spannring 8.5 hergestellt, der das Ende des Blechmantels 4 in eine umlaufende Sicke 2.1 preßt. Die Enden 8.6 des Spannrings 8.5 können zur Erhöhung der Dauerfestigkeit miteinander verschweißt werden. Eine derartige Verbindung ist nahezu so dicht und stabil wie eine Schweißverbindung, läßt sich jedoch schneller herstellen. Die bekannten Probleme bei Schweißverbindungen - Gefügeveränderungen, geringe mechanische Festigkeit, erhöhte Korrosionsanfälligkeit - treten nicht auf.In the area of the fixed bearing 6, the connection between the sheet metal jacket 4 and the exhaust gas-carrying pipe 2 is established by a clamping ring 8.5, which presses the end of the sheet metal jacket 4 into a circumferential bead 2.1. The ends 8.6 of the clamping ring 8.5 can be welded together to increase the fatigue strength. Such a connection is almost as tight and stable as a welded connection, but can be established more quickly. The known problems with welded joints - structural changes, low mechanical strength, increased Susceptibility to corrosion - do not occur.

Fig. 2 zeigt diese Verbindung im Querschnitt. Auf der Seite des Loslagers 7 wurde eine labyrinthartige Spaltdichtung realisiert mit Hilfe eines Muffenrings 9.1, der auf der einen Seite mit dem abgasführenden Rohr 2 verschweißt ist. Auch eine Klemmbefestigung ist möglich. Auf der anderen Seite übergreift der Muffenring 9.1 das Ende 4.1 des Blechmantels 4. Diese Verbindung ist weitestgehend geschützt gegen das Eindringen von Feuchtigkeit und Schmutz und gegen das Austreten von Isoliermaterial 3. Ferner können keine Klappergeräusche auftreten. Dynamische Relativbewegungen zwischen Gehäuse 1 und Blechmantel 4 sind auf ein Minimum reduziert, so daß auch bei Verwendung von Isoliermaterial 3 geringer mechanischer Festigkeit mit einer langen Lebensdauer desselben gerechnet werden kann.Fig. 2 shows this connection in cross section. On the side of the floating bearing 7, a labyrinth-like gap seal was realized with the aid of a sleeve ring 9.1, which is welded to the exhaust pipe 2 on one side. Clamping is also possible. On the other hand, the sleeve ring 9.1 overlaps the end 4.1 of the sheet metal jacket 4. This connection is largely protected against the ingress of moisture and dirt and against the escape of insulating material 3. Furthermore, no rattling noises can occur. Dynamic relative movements between the housing 1 and the sheet metal jacket 4 are reduced to a minimum, so that a long service life of the same can be expected even when using insulating material 3 of low mechanical strength.

Fig. 3 zeigt auf der Seite des Festlagers 6 eine Variante der mechanischen Verbindung ohne Schweißen. In das abgasführende Rohr 2 ist eine umlaufende Sicke 2.1 eingebracht. Über das Ende des Blechmantels 4 ist eine Muffe 8.2 gelegt und in die umlaufende Sicke 2.1 eingepreßt.Fig. 3 shows on the side of the fixed bearing 6 a variant of the mechanical connection without welding. A circumferential bead 2.1 is introduced into the exhaust pipe 2. A sleeve 8.2 is placed over the end of the sheet metal jacket 4 and pressed into the surrounding bead 2.1.

Im Bereich des Loslagers 7 trägt die Schiebemuffe 9.1 eine umlaufende Nut 9.2, in die das nach außen abgekröpfte Ende 4.2 des Blechmantels 4 eingreift. Dadurch wird die freie Beweglichkeit des Endes 4.2 des Blechmantels 4 in beiden Richtungen begrenzt; der Blechmantel 4 bleibt auch bei extremen Beanspruchungen sicher im Muffenring 9.1 gehalten.In the area of the floating bearing 7, the sliding sleeve 9.1 carries a circumferential groove 9.2 into which the end 4.2 of the sheet metal jacket 4, which is bent outwards, engages. This limits the free mobility of the end 4.2 of the metal jacket 4 in both directions; the sheet metal jacket 4 remains securely held in the sleeve ring 9.1 even under extreme loads.

Fig. 4 im Längsschnitt und Fig. 5 im Querschnitt zeigen eine dritte Ausführungsform für ein Festlager 6. Das Ende des Blechmantels 4 wird hier mit Hilfe eines breiten Spannrings 8.7 auf dem abgasführenden Rohr 2 befestigt, wobei die mechanische Spannung durch Bildung von angesickten Ohren 8.8 in den Spannring 8.7 eingebracht wird.Fig. 4 in longitudinal section and Fig. 5 in cross section show a third embodiment for a fixed bearing 6. The end of the sheet metal jacket 4 is here with the help of a wide clamping ring 8.7 attached to the exhaust pipe 2, the mechanical tension being introduced into the clamping ring 8.7 by forming beaded ears 8.8.

Im Bereich des Loslagers 7 erkennt man eine Ausführungsform, bei der das Ende 4.3 des Blechmantels 4 gewellt ist, so daß eine Art entsteht, die den notwendigen Spalt zwischen dem abgasführenden Rohr 2 und dem losen Ende des Muffenrings 9.1 elastisch überbrückt.In the area of the floating bearing 7 one can see an embodiment in which the end 4.3 of the sheet metal jacket 4 is corrugated, so that a type is created which elastically bridges the necessary gap between the exhaust pipe 2 and the loose end of the sleeve ring 9.1.

Es versteht sich, daß nicht alle denkbaren mechanischen Lösungen des erfindungsgemäßen Prinzips in der Zeichnung dargestellt werden konnten. Gemeinsam ist allen Lösungen die Dichtigkeit gegen das Eindringen von Schmutz und Feuchtigkeit und das Austreten von Isoliermaterial und der problemlose Ausgleich von thermischen Ausdehnungsdifferenzen im Bereich des Loslagers und die mechanische Festigkeit und Dichtigkeit im Bereich des Festlagers, wobei die mit Schweißverbindungen verknüpften Probleme vermieden werden.It is understood that not all conceivable mechanical solutions of the principle according to the invention could be shown in the drawing. Common to all solutions is the tightness against the ingress of dirt and moisture and the escape of insulating material and the problem-free compensation of thermal expansion differences in the area of the floating bearing and the mechanical strength and tightness in the area of the fixed bearing, while avoiding the problems associated with welded joints.

Claims (7)

1. Abgasanlage (1, 2) für Kraftfahrzeuge, bestehend aus abgasführenden Gehäusen (1) und/oder Rohren (2), die von einem aus relativ dünnem Blech bestehenden Blechmantel (4) umgeben sind, wobei zwischen Abgasanlage (1, 2) und Blechmantel (4) auf der einen Seite ein Festlager (6), auf der anderen Seite ein Loslager (7) ausgebildet ist, dadurch gekennzeichnet, daß das Festlager (6) als Klemmverbindung mit einem über den Blechmantel (4) gelegten Klemmring (8), das Loslager (7) als Spaltdichtung mit einem das freie Ende (4.1, 4.2, 4.3) des Blechmantels (4) übergreifenden und führenden Muffenring (9) ausgeführt ist, der auf der anderen Seite mit der Abgasanlage (1, 2) verbunden ist.1. Exhaust system (1, 2) for motor vehicles, consisting of exhaust gas-carrying housings (1) and / or pipes (2), which are surrounded by a sheet metal jacket (4) consisting of relatively thin sheet metal, between the exhaust system (1, 2) and Sheet metal jacket (4) has a fixed bearing (6) on one side and a floating bearing (7) on the other side, characterized in that the fixed bearing (6) is a clamping connection with a clamping ring (8) placed over the sheet metal jacket (4). , The floating bearing (7) as a gap seal with a free end (4.1, 4.2, 4.3) of the sheet metal jacket (4) overlapping and leading sleeve ring (9) is executed, which is connected on the other side to the exhaust system (1, 2) . 2. Abgasanlage nach Anspruch 1, dadurch gekennzeichnet, daß das Festlager (6) als eingesickte Muffe (8.2) realisiert ist.2. Exhaust system according to claim 1, characterized in that the fixed bearing (6) is implemented as a sunk sleeve (8.2). 3. Abgasanlage nach Anspruch 1, dadurch gekennzeichnet, daß das Festlager (6) als Spannring (8.7) mit angesickten Ohren (8.8) realisiert ist.3. Exhaust system according to claim 1, characterized in that the fixed bearing (6) as a clamping ring (8.7) with beaded ears (8.8) is realized. 4. Abgasanlage nach Anspruch 1, dadurch gekennzeichnet, daß das Festlager (6) als aufgespannter Ring (8.5) realisiert ist.4. Exhaust system according to claim 1, characterized in that the fixed bearing (6) is realized as a clamped ring (8.5). 5. Abgasanlage nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das freie Ende (4.3) des Blechmantels (4) gewellt ist.5. Exhaust system according to one of claims 1 to 4, characterized in that the free end (4.3) of the sheet metal jacket (4) is corrugated. 6. Abgasanlage nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß am Muffenring (9.1) eine umlaufende Nut 9.2) vorgesehen ist, die die freie Bewegung des ausgestellten Endes (4.2) des Blechmantels (4) begrenzt.6. Exhaust system according to one of claims 1 to 5, characterized in that a circumferential groove 9.2) is provided on the sleeve ring (9.1), which limits the free movement of the flared end (4.2) of the sheet metal jacket (4). 7. Abgasanlage nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß am Gehäuse (1) bzw. Rohr (2) eine umlaufende Nut vorgesehen ist, die die freie Bewegung des ausgestellten Endes des Blechmantels (4) begrenzt.7. Exhaust system according to one of claims 1 to 5, characterized in that a circumferential groove is provided on the housing (1) or tube (2), which limits the free movement of the flared end of the sheet metal jacket (4).
EP89104504A 1988-03-19 1989-03-14 Exhaust device for motor vehicles Expired - Lifetime EP0334168B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3809324 1988-03-19
DE3809324A DE3809324A1 (en) 1988-03-19 1988-03-19 EXHAUST SYSTEM FOR MOTOR VEHICLES

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EP0334168A1 true EP0334168A1 (en) 1989-09-27
EP0334168B1 EP0334168B1 (en) 1991-05-22

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EP89104504A Expired - Lifetime EP0334168B1 (en) 1988-03-19 1989-03-14 Exhaust device for motor vehicles

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DE (2) DE3809324A1 (en)
ES (1) ES2023517B3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2653491A1 (en) * 1989-10-24 1991-04-26 Wimetal Sa Exhaust pipe particularly for a motor vehicle
FR2655392A1 (en) * 1989-12-04 1991-06-07 Wimeral Sa DEVICE FOR FASTENING A THERMAL PROTECTION SCREEN ON AN EXHAUST LINE.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4033711C2 (en) * 1990-10-24 1994-01-27 Daimler Benz Ag Thermal insulation for a housing wall
DE102019114999A1 (en) * 2019-06-04 2020-12-10 Friedrich Boysen Gmbh & Co. Kg Unit for a structural component, in particular an exhaust system, of a vehicle or for a stationary exhaust system

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FR2114732A5 (en) * 1970-11-20 1972-06-30 Alfa Romeo Spa
US3727410A (en) * 1971-12-03 1973-04-17 Arvin Ind Inc Exhaust gas manifold
DE2552647A1 (en) * 1974-11-26 1976-08-12 Fuji Heavy Ind Ltd DEVICE FOR THERMAL INSULATION OF EXHAUST PIPES IN COMBUSTION ENGINES
DE3043363A1 (en) * 1979-11-15 1981-05-27 Johns-Manville Corp., Denver, Col. EXHAUST SYSTEM FOR COMBUSTION ENGINES OF MOTOR VEHICLES

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US3478783A (en) * 1967-03-27 1969-11-18 Robert Redford Doyle Thermally insulated piping system
FR2114732A5 (en) * 1970-11-20 1972-06-30 Alfa Romeo Spa
US3727410A (en) * 1971-12-03 1973-04-17 Arvin Ind Inc Exhaust gas manifold
DE2552647A1 (en) * 1974-11-26 1976-08-12 Fuji Heavy Ind Ltd DEVICE FOR THERMAL INSULATION OF EXHAUST PIPES IN COMBUSTION ENGINES
DE3043363A1 (en) * 1979-11-15 1981-05-27 Johns-Manville Corp., Denver, Col. EXHAUST SYSTEM FOR COMBUSTION ENGINES OF MOTOR VEHICLES

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FR2653491A1 (en) * 1989-10-24 1991-04-26 Wimetal Sa Exhaust pipe particularly for a motor vehicle
FR2655392A1 (en) * 1989-12-04 1991-06-07 Wimeral Sa DEVICE FOR FASTENING A THERMAL PROTECTION SCREEN ON AN EXHAUST LINE.
EP0432069A1 (en) * 1989-12-04 1991-06-12 Wimetal S.A. Device for fastening a heat shield on an exhaust system

Also Published As

Publication number Publication date
EP0334168B1 (en) 1991-05-22
ES2023517B3 (en) 1992-01-16
DE58900121D1 (en) 1991-06-27
DE3809324A1 (en) 1989-09-28

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