EP0226022A1 - Combined exhaust silencer and vibration damper - Google Patents

Combined exhaust silencer and vibration damper Download PDF

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Publication number
EP0226022A1
EP0226022A1 EP86115307A EP86115307A EP0226022A1 EP 0226022 A1 EP0226022 A1 EP 0226022A1 EP 86115307 A EP86115307 A EP 86115307A EP 86115307 A EP86115307 A EP 86115307A EP 0226022 A1 EP0226022 A1 EP 0226022A1
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EP
European Patent Office
Prior art keywords
gas inlet
silencer
chamber
muffler
vibration
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.)
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Application number
EP86115307A
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German (de)
French (fr)
Inventor
Michael Mohrenstein-Ertel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus Defence and Space GmbH
Original Assignee
Messerschmitt Bolkow Blohm AG
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Filing date
Publication date
Application filed by Messerschmitt Bolkow Blohm AG filed Critical Messerschmitt Bolkow Blohm AG
Publication of EP0226022A1 publication Critical patent/EP0226022A1/en
Withdrawn legal-status Critical Current

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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
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • 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
    • 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
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2875—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration by using elastic means, e.g. spring leaves, for retaining catalyst body in the housing
    • 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
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
    • 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
    • F01N2230/00—Combination of silencers and other devices
    • F01N2230/04—Catalytic converters
    • 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
    • F01N2310/02—Mineral wool, e.g. glass wool, rock wool, asbestos 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/12—Tubes being corrugated

Definitions

  • the invention relates to a muffler, in particular for internal combustion engines, with a muffler chamber and with a gas inlet and outlet pipe.
  • the mufflers which are arranged in particular in exhaust systems of internal combustion engines, are optimized with regard to their sound-absorbing effect on the periodic exhaust emissions, the position of the muffler in the line additionally determining the quality of the damping.
  • the connection between the silencer or silencers and the line pipes is designed to be rigid and gas-tight. Due to the large length of the exhaust systems, vibration problems often occur, which can only be alleviated by carefully choosing the suspension points and, if necessary, by taking additional vibration-damping measures. Particularly vibration-sensitive parts of the exhaust system, such as Catalysts require special vibration-isolating measures, which are often supplemented by additional flexible elements in the connecting pipes.
  • the invention has set itself the task of creating a silencer, in particular for internal combustion engines, which significantly simplifies the construction of exhaust systems with regard to the vibration problems that occur. This object is achieved by a muffler designed according to the characterizing features of claim 1.
  • the muffler according to the invention acts both as a result of its vibration-insulated and damped muffler chamber from the connecting pipes Silencer for airborne sound as well as a vibration damper against vibrations of the entire exhaust system.
  • the non-rigid connection between the muffler chamber and the gas inlet and outlet pipe also enables greater tolerances when installing the entire exhaust system.
  • the choice of the suspension or fastening points of the exhaust system equipped with such a silencer is relatively uncritical and can essentially be statically matched to the weight distribution.
  • the silencer 1 is between the connecting pipes V1 and V2 an exhaust system for an internal combustion engine, a muffler 1.
  • the silencer 1 is a gas inlet pipe 2 and a gas outlet pipe 3 with the connecting pipes V1 and V2 in a conventional manner via a clampable connector rigid and gas-tight connected is.
  • the actual muffler chamber 4 is located between the gas inlet pipe 2 and the gas outlet pipe 3 and can be designed in a conventional manner, for example as a reflection or absorption muffler.
  • the muffler chamber 4 is connected to the gas inlet and outlet pipes 2 and 3 in a vibration-insulated manner via tubular connecting elements 4.1 and 4.2, so that their inert mass M is opposite the gas inlet and outlet pipes -Exit pipe 2 and 3 or the connecting pipes V1 and V2 can move relatively in the axial and radial directions, which is indicated by the intersecting double arrows. This relative movement is damped by vibration-damping materials 8 in the space between the gas inlet or outlet pipe 2 or 3 and the tubular transition elements 4.1 or 4.2.
  • the silencer chamber 4 can additionally be surrounded by a comparatively thin and light outer jacket 5, which in turn is firmly and gas-tightly connected to the gas inlet and outlet pipes 2 and 3. Further vibration-damping measures acting on the muffler chamber 4, for example a filling with mineral wool, can be provided on the outer jacket 5, which measures also have heat-insulating properties.
  • the gas inlet pipe 2 shows the gas inlet side of a muffler with vibration-insulated and vibration-damping muffler chamber 4.
  • the gas inlet pipe 2 has at its outlet end two ring disk elements 2.1 and 2.2, which are arranged at axial intervals and are fixedly connected to the gas inlet pipe 2.
  • a tubular connecting element 4.1 of the muffler chamber 4 envelops the gas inlet pipe 2 and the disk elements 2.1 and 2.2 in the manner of a labyrinth seal while maintaining a meandering space.
  • This intermediate space is filled with a vibration-damping material 5, for example mineral, ceramic, metal fibers or a mixture of two or more of these components.
  • elastic plastics can also be used, which then enable complete gas tightness.
  • the silencer chamber 4 and the connector 4.1 are from an outer jacket 5, which is gas-tight and firmly connected to the gas inlet tube 2.
  • the space between the silencer chamber 4 and the outer casing 5 is in turn filled with a vibration-damping material 6, which should advantageously also have heat-insulating properties. Mineral or ceramic fibers are also suitable here.
  • the walls of the muffler chamber 4 are largely resistant to bending, the walls of the outer jacket should be relatively thin and flexible and, if necessary, be designed in part in the manner of a corrugated pipe (5.1). With this measure, larger tolerances are also possible with regard to the axial alignment between the gas inlet pipe 2 and the connecting pipe (not shown) connected to it.
  • the muffler chamber 4 is vibration-insulated and damped from the connecting pipes, it can easily handle vibration-sensitive parts such as e.g. Means for the catalytic afterburning of exhaust gases, for example, a ceramic-based catalyst 7, which is held by spring elements 9, 10 and 11.
  • vibration-sensitive parts such as e.g. Means for the catalytic afterburning of exhaust gases, for example, a ceramic-based catalyst 7, which is held by spring elements 9, 10 and 11.
  • the known means 12 for sound attenuation such as reflection mufflers or absorption mufflers, with Helmholtz resonators, reflection screens, Venturi nozzles, perforated eaves and the like.
  • the gas outlet side is then again designed analogously to the gas inlet side.

Abstract

The silencer is particularly suitable for internal combustion engines and consists of a silencer chamber and a gas inlet and outlet tube. The silencer chamber (4) is not rigid as has hitherto been the case but is connected to the gas inlet and/or outlet tube (2, 3) by a vibration isolating and/or vibration damping arrangement and it is thus able to damp both the sound and the mechanical vibrations of the entire exhaust system. A catalytic converter can be incorporated in the silencer chamber. <IMAGE>

Description

Die Erfindung betrifft einen Schalldämpfer, insbesonde­re für Verbrennungsmotoren, mit einer Schalldämpferkam­mer sowie mit einem Gaseintritts- und einem -austritts­rohr.The invention relates to a muffler, in particular for internal combustion engines, with a muffler chamber and with a gas inlet and outlet pipe.

Die, insbesondere in Abgasanlagen von Verbrennungsmoto­ren angeordneten Schalldämpfer sind hinsichtlich ihrer schalldämpfenden Wirkung auf die periodischen Abgasstö­ße optimiert, wobei zusätzlich die Lage des Schall­dämpfers in der Leitung die Güte der Dämpfung bestimmt. Die Verbindung zwischen dem oder den Schalldämpfern und den Leitungsrohren ist dabei starr und gasdicht ausge­legt. Aufgrund der großen Länge der Abgasanlagen treten daher häufig Schwingungsprobleme auf, die nur durch ei­ne sorgfältige Wahl der Aufhängepunkte und notfalls durch zusätzliche schwingungsdämpfende Maßnahmen gemil­dert werden können. Besonders vibrationsempfindliche Teile der Abgasanlage, wie z.B. Katalysatoren bedürfen besonderer schwingungsisolierender Maßnahmen, welche oftmals durch zusätzliche flexible Elemente in den Ver­bindungsrohren ergänzt werden.The mufflers, which are arranged in particular in exhaust systems of internal combustion engines, are optimized with regard to their sound-absorbing effect on the periodic exhaust emissions, the position of the muffler in the line additionally determining the quality of the damping. The connection between the silencer or silencers and the line pipes is designed to be rigid and gas-tight. Due to the large length of the exhaust systems, vibration problems often occur, which can only be alleviated by carefully choosing the suspension points and, if necessary, by taking additional vibration-damping measures. Particularly vibration-sensitive parts of the exhaust system, such as Catalysts require special vibration-isolating measures, which are often supplemented by additional flexible elements in the connecting pipes.

Die Erfindung hat sich zur Aufgabe gesetzt, einen Schalldämpfer, insbesondere für Verbrennungsmotoren zu schaffen, der den Aufbau von Abgasanlagen hinsichtlich der dabei auftretenden Schwingungsprobleme wesentlich erleichtert. Diese Aufgabe wird durch einen nach den kennzeichnenden Merkmalen des Anspruchs 1 ausgebildeten Schalldämpfer gelöst.The invention has set itself the task of creating a silencer, in particular for internal combustion engines, which significantly simplifies the construction of exhaust systems with regard to the vibration problems that occur. This object is achieved by a muffler designed according to the characterizing features of claim 1.

Der erfindungsgemäße Schalldämpfer wirkt aufgrund sei­ner schwingungsmäßig von den Verbindungsrohren isolier­ten und gedämpfen Schalldämpferkammer sowohl als Schalldämpfer für Luftschall als auch als Schwingungsdämpfer gegen Vibrationen der gesamten Ab­gasanlage. Die nicht starre Verbindung zwischen der Schalldämpferkammer und dem Gaseintritts- und -aus­trittsrohr ermöglichen zudem größere Toleranzen bei der Montage der gesamten Abgasanlage. Die Wahl der Aufhän­ge- bzw. Befestigungspunkte der mit einem solchen Schalldämpfer ausgestatteten Abgasanlage ist relativ unkritisch und kann im wesentlichen statisch auf die Gewichtsverteilung abgestimmt sein.The muffler according to the invention acts both as a result of its vibration-insulated and damped muffler chamber from the connecting pipes Silencer for airborne sound as well as a vibration damper against vibrations of the entire exhaust system. The non-rigid connection between the muffler chamber and the gas inlet and outlet pipe also enables greater tolerances when installing the entire exhaust system. The choice of the suspension or fastening points of the exhaust system equipped with such a silencer is relatively uncritical and can essentially be statically matched to the weight distribution.

Die Erfindung wird im folgenden anhand eines in den Fi­guren 1 und 2 teilweise schematisch dargestellten Aus­führungsbeispieles näher beschrieben. Es zeigen:

  • Fig. 1 einen prinzipiellen Aufbau eines Schalldämpfers:
  • Fig. 2 eine Teilansicht einer konstruktiven Lösung des Schalldämpfers.
The invention is described in more detail below on the basis of an exemplary embodiment which is shown schematically in FIGS. 1 and 2. Show it:
  • 1 shows a basic structure of a silencer:
  • Fig. 2 is a partial view of a constructive solution of the silencer.

Gemäß Fig. 1 befindet sich zwischen den Verbindungsroh­ren V₁ und V₂ einer Abgasanlage für einen Verbren­nungsmotor ein Schalldämpfer 1. Der Schalldämpfer 1 ist über ein Gaseintrittsrohr 2 sowie ein Gasaustrittsrohr 3 mit den Verbindungsrohren V₁ bzw. V₂ in herkömm­licher Weise über eine klemmbare Steckverbindung starr und gasdicht verbunden ist. Zwischen dem Gaseintritts­rohr 2 und dem Gasaustrittsrohr 3 befindet sich die ei­gentliche Schalldämpferkammer 4, die in herkömmlicher Weise z.B. als Reflexions- oder Absorptionsschall­dämpfer ausgebildet sein kann. Die Schalldämpferkammer 4 ist über rohrförmige Verbindungselemente 4.1 und 4.2 mit dem Gaseintritts- und -austrittsrohr 2 und 3 schwingungsisoliert verbunden, so daß sie sich mit ihrer trägen Masse M gegenüber dem Gaseintritts- und -austrittsrohr 2 und 3 bzw. den Verbindungsrohren V₁ und V₂ in axialer und radialer Richtung relativ bewegen kann, was durch die sich kreuzenden Doppel­pfeile angedeutet ist. Diese Relativbewegung wird durch schwingungsdämpfende Materialien 8 im Zwischenraum zwi­schen dem Gaseintritts- bzw. -austrittsrohr 2 bzw. 3 und den rohrförmigen Übergangselementen 4.1 bzw. 4.2 gedämpft. Die Schalldämpferkammer 4 kann noch zusätz­lich von einem vergleichsweise dünnen und leichten Au­ßenmantel 5 umgeben sein, welcher seinerseits fest und gasdicht mit dem Gaseintritts- und -austrittsrohr 2 und 3 verbunden ist. An dem Außenmantel 5 können nun weitere, auf die Schalldämpferkammer 4 wirkende schwingungsdämpfende Maßnahmen, z.B. eine Füllung mit Mineralwolle, vorgesehen sein, die zudem noch wärme­isolierende Eigenschaften hat.1 is between the connecting pipes V₁ and V₂ an exhaust system for an internal combustion engine, a muffler 1. The silencer 1 is a gas inlet pipe 2 and a gas outlet pipe 3 with the connecting pipes V₁ and V₂ in a conventional manner via a clampable connector rigid and gas-tight connected is. The actual muffler chamber 4 is located between the gas inlet pipe 2 and the gas outlet pipe 3 and can be designed in a conventional manner, for example as a reflection or absorption muffler. The muffler chamber 4 is connected to the gas inlet and outlet pipes 2 and 3 in a vibration-insulated manner via tubular connecting elements 4.1 and 4.2, so that their inert mass M is opposite the gas inlet and outlet pipes -Exit pipe 2 and 3 or the connecting pipes V₁ and V₂ can move relatively in the axial and radial directions, which is indicated by the intersecting double arrows. This relative movement is damped by vibration-damping materials 8 in the space between the gas inlet or outlet pipe 2 or 3 and the tubular transition elements 4.1 or 4.2. The silencer chamber 4 can additionally be surrounded by a comparatively thin and light outer jacket 5, which in turn is firmly and gas-tightly connected to the gas inlet and outlet pipes 2 and 3. Further vibration-damping measures acting on the muffler chamber 4, for example a filling with mineral wool, can be provided on the outer jacket 5, which measures also have heat-insulating properties.

Fig. 2 zeigt die Gaseintrittsseite eines Schalldämpfers mit schwingungsisolierter und -dämpfender Schall­dämpferkammer 4. Das Gaseintrittsrohr 2 weist an seinem austrittsseitigen Ende zwei in axialen Abständen ange­ordnete, fest mit dem Gaseintrittsrohr 2 verbundene Ringscheibenelemente 2.1 und 2.2 auf. Ein rohrförmiges Verbindungselement 4.1 der Schalldämpferkammer 4 um­hüllt das Gaseintrittsrohr 2 und die Scheibenelemente 2.1 und 2.2 nach Art einer Labyrinthdichtung unter Bei­behaltung eines mäanderförmigen Zwischenraumes. Dieser Zwischenraum ist mit einem schwingungsdämpfenden Mate­rial 5, z.B. Mineral-, Keramik-, Metallfasern oder ein Gemisch aus zweien oder mehreren dieser Komponenten ge­füllt. Je nach Temperaturbelastung können auch elasti­sche Kunststoffe zur Anwendung kommen, die dann eine vollkommene Gasdichtheit ermöglichen. Die Schall­dämpferkammer 4 und das Verbindungsstück 4.1 sind von einem Außenmantel 5 umgeben, welcher gasdicht und fest mit dem Gaseintrittsrohr 2 verbunden ist. Der Zwischen­raum zwischen der Schalldämpferkammer 4 und dem Außen­mantel 5 ist wiederum mit einem schwingungsdämpfenden Material 6 gefüllt, welches vorteilhafterweise auch noch wärmeisolierende Eigenschaften haben sollte. Auch hier eignen sich Mineral- oder Keramikfasern. Während die Wandungen der Schalldämpferkammer 4 weitgehend bie­gesteif sind, sollten die Wandungen des Außenmantels relativ dünn und flexibel sein und ggf. teilweise nach Art eines Wellrohres ausgebildet sein (5.1). Durch die­se Maßnahme sind größere Toleranzen auch bezüglich der axialen Ausrichtung zwischen dem Gaseintrittsrohr 2 und dem sich daran anschließenden, nicht gezeigten Verbin­dungsrohr möglich.2 shows the gas inlet side of a muffler with vibration-insulated and vibration-damping muffler chamber 4. The gas inlet pipe 2 has at its outlet end two ring disk elements 2.1 and 2.2, which are arranged at axial intervals and are fixedly connected to the gas inlet pipe 2. A tubular connecting element 4.1 of the muffler chamber 4 envelops the gas inlet pipe 2 and the disk elements 2.1 and 2.2 in the manner of a labyrinth seal while maintaining a meandering space. This intermediate space is filled with a vibration-damping material 5, for example mineral, ceramic, metal fibers or a mixture of two or more of these components. Depending on the temperature load, elastic plastics can also be used, which then enable complete gas tightness. The silencer chamber 4 and the connector 4.1 are from an outer jacket 5, which is gas-tight and firmly connected to the gas inlet tube 2. The space between the silencer chamber 4 and the outer casing 5 is in turn filled with a vibration-damping material 6, which should advantageously also have heat-insulating properties. Mineral or ceramic fibers are also suitable here. While the walls of the muffler chamber 4 are largely resistant to bending, the walls of the outer jacket should be relatively thin and flexible and, if necessary, be designed in part in the manner of a corrugated pipe (5.1). With this measure, larger tolerances are also possible with regard to the axial alignment between the gas inlet pipe 2 and the connecting pipe (not shown) connected to it.

Da die Schalldämpferkammer 4 gegenüber den Verbindungs­rohren schwingungsisoliert und -gedämpft ist, kann sie problemlos vibrationsempfindliche Teile, wie z.B. Mit­tel zur katalytischen Nachverbrennung von Abgasen, al­so beispielsweise einen auf Keramikbasis aufgebauten Katalysator 7 aufnehmen, der durch Federelemente 9,10 und 11 gehalten wird. Daran anschließend können sich dann die bekannten Mittel 12 zur Schalldämpfung, wie Reflexionsschalldämpfer oder Absorptionsschalldämpfer, mit Helmholtz-Resonatoren, Reflexionsblenden, Venturi­düsen, Lochtraufen und dergleichen anschließen. Die Gasaustrittsseite ist dann wieder analog zur Gasein­trittsseite gestaltet.Since the muffler chamber 4 is vibration-insulated and damped from the connecting pipes, it can easily handle vibration-sensitive parts such as e.g. Means for the catalytic afterburning of exhaust gases, for example, a ceramic-based catalyst 7, which is held by spring elements 9, 10 and 11. This can then be followed by the known means 12 for sound attenuation, such as reflection mufflers or absorption mufflers, with Helmholtz resonators, reflection screens, Venturi nozzles, perforated eaves and the like. The gas outlet side is then again designed analogously to the gas inlet side.

Claims (6)

1. Schalldämpfer, insbesondere für Verbrennungsmo­toren, mit einer Schalldämpferkammer sowie mit einem Gaseintritts- und einem -austrittsrohr dadurch ge­kennzeichnet, daß die Schalldämpferkammer (4) schwingungsisoliert und/oder -dämpfend mit dem Gas­eintritts- und/oder -austrittsrohr (2,3) verbunden ist.1. Muffler, in particular for internal combustion engines, with a muffler chamber and with a gas inlet and an outlet pipe, characterized in that the muffler chamber (4) vibration-insulated and / or -damping connected to the gas inlet and / or outlet pipe (2,3) is. 2. Schalldämpfer nach Anspruch 1, dadurch ge­kennzeichnet, daß die Schalldämpferkammer (4) von einem Außenmantel (5) umgeben ist, welcher fest und gasdicht mit dem Gaseintritts- und/oder -aus­trittsrohr (2,3) verbunden ist, und, daß der Zwischen­raum zwischen der Schalldämpferkammer (4) und dem Au­ßenmantel (5) zumindest teilweise mit schwingungs­dämpfendem Material (6) gefüllt ist.2. Muffler according to claim 1, characterized in that the muffler chamber (4) is surrounded by an outer jacket (5) which is firmly and gas-tightly connected to the gas inlet and / or outlet pipe (2,3), and that The space between the silencer chamber (4) and the outer casing (5) is at least partially filled with vibration-damping material (6). 3. Schalldämpfer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Wandungen der Schalldämpferkammer (4) biegesteif sind.3. Silencer according to claim 1 or 2, characterized in that the walls of the silencer chamber (4) are rigid. 4. Schalldämpfer nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Wan­dungen des Außenmantels (5) zumindest teilweise flexi­bel sind.4. Silencer according to one of claims 1 to 3, characterized in that the walls of the outer casing (5) are at least partially flexible. 5. Schalldämpfer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Gaseintritts- und/oder -austrittsrohr (2,3) ein oder mehrere hintereinander angeordnete Ringscheibenelemente (2.1, 2.2) aufweist, und, daß die Schalldämpferkammer (4) rohrförmige Übergangselemente (4.1, 4.2) aufweist, welche das Gaseintritts- und/oder -austrittsrohr (2,3) sowie die Ringscheibenelement (2.1, 2.2) nach Art ei­ner Labyrinthdichtung umgeben, wobei der Zwischenraum zwischen einem Übergangselement (4.1,4.2) und dem davon umgebenen, mit Ringscheiben versehenen Bereich des Gas­eintritts- und/oder -austrittsrohres ein schwingungs­dämpfendes Material (8) aufweist.5. Silencer according to one of claims 1 to 4, characterized in that the gas inlet and / or outlet pipe (2,3) or has a plurality of ring disk elements (2.1, 2.2) arranged one behind the other, and that the muffler chamber (4) has tubular transition elements (4.1, 4.2) which the gas inlet and / or outlet pipe (2,3) and the ring disk element (2.1, 2.2) surrounded in the manner of a labyrinth seal, the intermediate space between a transition element (4.1, 4.2) and the area of the gas inlet and / or outlet pipe, which is provided with annular disks, having a vibration-damping material (8). 6. Schalldämpfer nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß in der Schalldämpferkammer (4) Mittel (7) zur katalytischen Nachverbrennung von Abgasen angeordnet sind.6. Silencer according to one of claims 1 to 5, characterized in that in the silencer chamber (4) means (7) are arranged for the catalytic afterburning of exhaust gases.
EP86115307A 1985-11-13 1986-11-05 Combined exhaust silencer and vibration damper Withdrawn EP0226022A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3540231 1985-11-13
DE19853540231 DE3540231A1 (en) 1985-11-13 1985-11-13 COMBINED SOUND AND VIBRATION DAMPER

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EP0226022A1 true EP0226022A1 (en) 1987-06-24

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Cited By (6)

* Cited by examiner, † Cited by third party
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FR2653491A1 (en) * 1989-10-24 1991-04-26 Wimetal Sa Exhaust pipe particularly for a motor vehicle
FR2668539A1 (en) * 1990-10-24 1992-04-30 Bronzavia Aeronautique Sa Exhaust silencer
US6892854B2 (en) * 1992-06-02 2005-05-17 Donaldson Company, Inc. Muffler with catalytic converter arrangement; and method
DE102005003582A1 (en) * 2005-01-26 2006-08-03 Dr.Ing.H.C. F. Porsche Ag Silencer for an exhaust system
US7997071B2 (en) 2004-10-01 2011-08-16 Donaldson Company, Inc. Exhaust flow distribution device
US8110151B2 (en) 2006-04-03 2012-02-07 Donaldson Company, Inc. Exhaust flow distribution device

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
DE9406596U1 (en) * 1994-04-20 1994-07-28 Porsche Ag Silencer
DE10021809C1 (en) * 2000-05-04 2001-11-15 Daimler Chrysler Ag Joining system, for pipe in flanged connector, comprises welding to produce bead between end of connector and outer wall of pipe, recess behind bead being filled with second material to increase impact strength of joint
DE202008013021U1 (en) * 2007-10-01 2008-12-24 Bdd Beteiligungs Gmbh Insulating device of a compensator

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US2081546A (en) * 1934-03-29 1937-05-25 Hupp Motor Car Corp Muffler mounting
GB1093180A (en) * 1964-03-16 1967-11-29 Corning Glass Works Acoustical device for suppressing noise in a gas stream
GB1395960A (en) * 1971-09-13 1975-05-29 Ford Motor Co Catalytic converter
DE2701022A1 (en) * 1977-01-12 1978-07-13 Volkswagenwerk Ag Gas tight joint for IC engine exhaust pipes - permits relative pipe movement and has flanged pipes and sleeve over packing rings
DE3026730A1 (en) * 1980-07-15 1982-02-04 Adam Opel AG, 6090 Rüsselsheim First-stage vehicle engine exhaust silencer - has vibration damping connections between inlet and outlet and between inlet and housing
DE3137746A1 (en) * 1981-09-23 1983-06-09 Volkswagenwerk Ag, 3180 Wolfsburg Exhaust system for the internal combustion engine of a vehicle
US4540064A (en) * 1982-03-17 1985-09-10 Nissan Motor Co., Ltd. Noise and vibration reducing apparatus for use in exhaust system of engine

Cited By (8)

* 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
FR2668539A1 (en) * 1990-10-24 1992-04-30 Bronzavia Aeronautique Sa Exhaust silencer
US6892854B2 (en) * 1992-06-02 2005-05-17 Donaldson Company, Inc. Muffler with catalytic converter arrangement; and method
US7997071B2 (en) 2004-10-01 2011-08-16 Donaldson Company, Inc. Exhaust flow distribution device
DE102005003582A1 (en) * 2005-01-26 2006-08-03 Dr.Ing.H.C. F. Porsche Ag Silencer for an exhaust system
US7438157B2 (en) 2005-01-26 2008-10-21 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Muffler for an exhaust gas system
US8110151B2 (en) 2006-04-03 2012-02-07 Donaldson Company, Inc. Exhaust flow distribution device
US8470253B2 (en) 2006-04-03 2013-06-25 Donaldson Company, Inc. Exhaust flow distribution device

Also Published As

Publication number Publication date
DE3540231C2 (en) 1987-10-22
DE3540231A1 (en) 1987-05-14

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