EP0628705B1 - Exhaust silencer - Google Patents

Exhaust silencer Download PDF

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Publication number
EP0628705B1
EP0628705B1 EP94102072A EP94102072A EP0628705B1 EP 0628705 B1 EP0628705 B1 EP 0628705B1 EP 94102072 A EP94102072 A EP 94102072A EP 94102072 A EP94102072 A EP 94102072A EP 0628705 B1 EP0628705 B1 EP 0628705B1
Authority
EP
European Patent Office
Prior art keywords
sound
housing
casing
sound insulation
absorption chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94102072A
Other languages
German (de)
French (fr)
Other versions
EP0628705A1 (en
Inventor
Rudi Luft
Rüdiger Mussler
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.)
Roth Technik GmbH
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Roth Technik GmbH
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Filing date
Publication date
Application filed by Roth Technik GmbH filed Critical Roth Technik GmbH
Publication of EP0628705A1 publication Critical patent/EP0628705A1/en
Application granted granted Critical
Publication of EP0628705B1 publication Critical patent/EP0628705B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01N13/1872—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/04—Silencing apparatus characterised by method of silencing by using resonance having sound-absorbing materials in resonance chambers
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/15—Plurality of resonance or dead chambers
    • F01N2490/155—Plurality of resonance or dead chambers being disposed one after the other in flow direction

Definitions

  • the invention relates to a silencer according to the preamble of patent claim 1.
  • both the exhaust gas inlet pipe and the exhaust gas outlet pipe penetrate the housing of the muffler and protrude with their respective ends into the actual soundproofing chamber.
  • Both pipes are connected both to the housing and to the wall of the sound insulation chamber and hereby fix the relative position of the sound insulation chamber to the housing.
  • This attachment represents a two-point bracket, which tends to vibrate relatively easily, especially when the two pipes are connected to the latter in the region of only one end face of the sound insulation chamber or the housing.
  • the two pipes are exposed to both thermal and mechanical loads in their respective fastening area, which can lead to a relatively rapid destruction of the connections, especially when there are also corrosion effects.
  • the invention has for its object to provide a low-vibration and thus stable arrangement that offers sufficient security for attaching the sound insulation chamber and securing its position relative to the housing.
  • the fastening element as a tab with unequal long longitudinal sides, the larger long side being firmly connected to an end wall of the sound insulation chamber and the shorter long side being firmly connected to the inside of the housing, a three-point fastening and thus a vibration-free and stable construction created that provides sufficient stability even when using the silencer in off-road vehicles for the rough operation there. Furthermore, this measure minimizes the transmission capacity of structure-borne noise insofar as only the shorter long side of the bracket is connected to the housing of the silencer.
  • FR-A-1472876 a silencer according to the preamble of claim 1 was known, the space between the soundproofing chamber and the inside of the housing and filled with soundproofing material being divided into a plurality of chambers by partition walls arranged essentially perpendicular to the flow direction of the exhaust gas . Although these partitions surround the actual sound insulation chamber and can therefore determine the relative position of the same to the housing of the muffler to a certain extent, however, it is not clear from FR-A-1472876 whether or that these partitions with the outside of the sound insulation chamber and / or the inside of the Housing are firmly connected.
  • the housing of which is formed by two half-shells which are connected to one another by folding along at least one of their longitudinal sides, there is an inexpensive fastening of the tab to the housing in that the tab projects between the two folded ends of the half-shells.
  • both the front wall of the sound insulation chamber and the wall of the housing opposite this are each provided with a receiving groove for the tab, the width of which corresponds to the thickness of the tab and the lengths of which correspond essentially to the corresponding lengths of the longitudinal sides of the tab.
  • the silencer shown in Fig. 1 has a housing which is formed by two half-halves 2, 3 which are connected to one another along their long sides. This connection can be formed in a manner to be explained later by folding the free ends of the long sides of the half-shells.
  • the actual sound insulation chamber 4 is arranged in the interior of the housing, the space between the outer wall of the sound insulation chamber 4 and the inner wall of the housing 1 having a sound insulation material 5, for example, an insulation mat is filled.
  • an exhaust gas inlet pipe 7 and an exhaust gas outlet pipe 8 protrude into the interior of the sound insulation chamber 4.
  • the axis of the inlet pipe 7 can be at an angle to the longitudinal axis of the housing.
  • Both exhaust pipes 7, 8 penetrate the walls of both the sound insulation chamber 4 and the housing 1 and project with their other ends into the open. These two pipe ends simultaneously form the connecting pieces for the exhaust pipes, not shown, leading from or to the silencer.
  • Both the exhaust gas inlet pipe 7 and the exhaust gas outlet pipe 8 are connected to the housing 1 and the sound insulation chamber 4 both in its area penetrating the housing 1 and in its area penetrating the sound insulation chamber 4. This connection can be made by welding and is used to fasten the sound insulation chamber 4 inside the housing 1.
  • the soundproofing chamber 4 is firmly connected in the region of one of its end walls, preferably in the region of the wall facing away from the exhaust pipes, to a long side 9 of an additional fastening element designed as a tab 10, the other long side of which is firmly connected to the housing 1.
  • the fastening element or the tab 10 forms, together with the ends of the exhaust pipes 7, 8 which are fixedly connected to the sound insulation chamber 4, a three-point bearing which is low in vibration and secures the relative position of the sound insulation chamber 4 and the housing 1.
  • the long sides 9, 11 of the Tab 10 In order on the one hand to have the largest possible area available for fastening the tab 10 to the sound insulation chamber 4, but on the other hand to reduce the transmission of structure-borne noise to a minimum, the long sides 9, 11 of the Tab 10 of different lengths.
  • the long side 9 extends over the entire width of the sound insulation chamber 4, while the long side 11 fastened to the housing 1, on the other hand, is substantially shorter.
  • the tab 10 can be fastened to the sound insulation chamber 4 as well as to the housing 1 by means of a weld seam.
  • the tab 10 is formed in one piece with the wall of the sound insulation chamber 4 facing it. It protrudes with its short longitudinal side between the ends 12 and the two half-shells 2 and 3 of the housing 1 and can thus be folded in by folding while connecting the two half-shells of the housing without requiring an additional operation for their attachment.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Communication Cables (AREA)

Abstract

A silencer has a housing (1) and a silencer chamber (4) arranged inside the former and surrounded with sound-insulating material (5), and an exhaust inlet pipe (7) and exhaust outlet pipe (8), both passing through the housing (1) and extending into the interior of the silencer chamber (4). Their ends fix the position of the silencer chamber (4) relative to the housing (1). An additional fixing element (10) is also provided for the silencer chamber (4), which element at one end engages on an outer side of the silencer chamber and at the other on an inner side of the housing (1). <IMAGE>

Description

Die Erfindung betrifft einen Schalldämpfer gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a silencer according to the preamble of patent claim 1.

Bei solchen Schalldämpfern durchdringen sowohl das Abgaseintritts- als auch das Abgasaustrittsrohr das Gehäuse des Schalldämpfers und ragen mit ihrem jeweiligen Ende in die eigentliche Schalldämmkammer. Beide Rohre sind dabei sowohl mit dem Gehäuse als auch mit der Wandung der Schalldämmkammer verbunden und fixieren hiermit die Relativlage der Schalldämmkammer zum Gehäuse.In such mufflers, both the exhaust gas inlet pipe and the exhaust gas outlet pipe penetrate the housing of the muffler and protrude with their respective ends into the actual soundproofing chamber. Both pipes are connected both to the housing and to the wall of the sound insulation chamber and hereby fix the relative position of the sound insulation chamber to the housing.

Diese Befestigung stellt eine Zweipunkthalterung dar, die insbesondere dann, wenn die beiden Rohre im Bereich nur eines stirnseitigen Endes der Schalldämmkammer bzw. des Gehäuses mit letzterem verbunden sind, relativ leicht zu Schwingungen neigt. Hinzu kommt, daß die beiden Rohre in ihrem jeweiligen Befestigungsbereich sowohl thermischen als auch mechanischen Belastungen ausgesetzt sind, was insbesondere dann, wenn noch Korrosionseinwirkungen hinzukommen, zu einer relativ schnellen Zerstörung der Verbindungen führen kann.This attachment represents a two-point bracket, which tends to vibrate relatively easily, especially when the two pipes are connected to the latter in the region of only one end face of the sound insulation chamber or the housing. In addition, the two pipes are exposed to both thermal and mechanical loads in their respective fastening area, which can lead to a relatively rapid destruction of the connections, especially when there are also corrosion effects.

Obwohl in solchen Fällen die thermisch am stärksten belastete Schalldämmkammer noch in Ordnung und funktionsfähig ist, führt dies, da die Relativlage zwischen Schalldämmkammer und Gehäuse nicht mehr gesichert und das Schalldämmaterial infolge einer möglichen Veränderung seiner Lage, die im allgemeinen zu einer einseitigen Anhäufung führt, seine Funktion nicht oder zumindest nicht mehr ausreichend erfüllen kann, des öfteren zur Unbrauchbarkeit des gesamten Schalldämpfers.Although in such cases the thermally most stressed sound insulation chamber is still in order and functional, this leads to the fact that the relative position between the sound insulation chamber and the housing is no longer secured and the sound insulation material due to a possible change in its position, which generally leads to a one-sided accumulation Function can not or at least not sufficiently perform, often to the unusability of the entire silencer.

Der Erfindung liegt die Aufgabe zugrunde, eine schwingungsarme und damit stabile Anordnung zu schaffen, die eine ausreichende Sicherheit für die Befestigung der Schalldämmkammer und die Sicherung ihrer Relativlage zum Gehäuse bietet.The invention has for its object to provide a low-vibration and thus stable arrangement that offers sufficient security for attaching the sound insulation chamber and securing its position relative to the housing.

Diese Aufgabe wird gelöst, durch die Ausbildung des Befestigungselementes als Lasche mit ungleich langen Längsseiten, wobei die größere Längsseite mit einer stirnseitigen Wandung der Schalldämmkammer und die kürzere Längsseite mit der Innenseite des Gehäuses fest verbunden ist, wird eine Dreipunktbefestigung und somit eine schwingungsfreie und stabile Konstruktion geschaffen, die selbst beim Einsatz des Schalldämpfers in Geländefahrzeugen für den dort herrschenden rauhen Betrieb eine ausreichende Stabilität bietet. Ferner wird durch diese Maßnahme die Übertragungsfähigkeit von Körperschall insoweit minimiert, als nur die kürzere Längsseite der Lasche mit dem Gehäuse des Schalldämpfers verbunden ist.This problem is solved by the design of the fastening element as a tab with unequal long longitudinal sides, the larger long side being firmly connected to an end wall of the sound insulation chamber and the shorter long side being firmly connected to the inside of the housing, a three-point fastening and thus a vibration-free and stable construction created that provides sufficient stability even when using the silencer in off-road vehicles for the rough operation there. Furthermore, this measure minimizes the transmission capacity of structure-borne noise insofar as only the shorter long side of the bracket is connected to the housing of the silencer.

Durch die FR-A-1472876 wurde zwar ein Schalldämpfer gemäß dem Oberbegriff des Patentanspruches 1 bekannt, wobei der zwischen der Schalldämmkammer und der Innenseite des Gehäuses gelegene und mit Schalldämmaterial ausgefüllte Raum durch im wesentlichen senkrecht zur Strömungsrichtung des Abgases angeordnete Zwischenwände in mehrere Kammern unterteilt ist. Diese Zwischenwände umgeben zwar die eigentliche Schalldämmkammer und können daher die Relativlage derselben zum Gehäuse des Schalldämpfers in bestimmten Maße bestimmen, jedoch geht aus der FR-A-1472876 nicht hervor, ob bzw daß diese Zwischenwände mit der Außenseite der Schalldämmkammer und / oder der Innenseite des Gehäuses fest verbunden sind.From FR-A-1472876 a silencer according to the preamble of claim 1 was known, the space between the soundproofing chamber and the inside of the housing and filled with soundproofing material being divided into a plurality of chambers by partition walls arranged essentially perpendicular to the flow direction of the exhaust gas . Although these partitions surround the actual sound insulation chamber and can therefore determine the relative position of the same to the housing of the muffler to a certain extent, however, it is not clear from FR-A-1472876 whether or that these partitions with the outside of the sound insulation chamber and / or the inside of the Housing are firmly connected.

Eine kostengünstige Herstellung von Schalldämmkammer und Lasche ergibt sich dadurch, daß die Lasche mit der stirnseitigen Wandung der Schalldämmkammer einstückig ausgebildet ist.An inexpensive manufacture of sound insulation chamber and tab results from the fact that the tab is formed in one piece with the front wall of the sound insulation chamber.

Für Schalldämpfer, deren Gehäuse von zwei Halbschalen gebildet ist, die entlang zumindest einer ihrer Längsseiten durch Falzen miteinander verbunden sind, ergibt sich eine kostengünstige Befestigung der Lasche am Gehäuse dadurch, daß die Lasche zwischen die beiden gefalzten Enden der Halbschalen ragt.For mufflers, the housing of which is formed by two half-shells which are connected to one another by folding along at least one of their longitudinal sides, there is an inexpensive fastening of the tab to the housing in that the tab projects between the two folded ends of the half-shells.

Gemäß einer weiteren Ausführungsvariante der Erfindung ist sowohl die stirnseitige Wandung der Schalldämmkammer als auch die dieser gegenüberliegende Wandung des Gehäuses mit je einer Aufnahmenut für die Lasche versehen, deren Weite der Dicke der Lasche und deren Längen im wesentlichen den entsprechenden Längen der Längsseiten der Lasche entsprechen.According to a further embodiment of the invention, both the front wall of the sound insulation chamber and the wall of the housing opposite this are each provided with a receiving groove for the tab, the width of which corresponds to the thickness of the tab and the lengths of which correspond essentially to the corresponding lengths of the longitudinal sides of the tab.

Die Erfindung ist anhand eines in den beigefügten Zeichnungen dargestellten Ausführungsbeispiels näher erläutert.
Es zeigen:

Figur 1
eine Vorderansicht eines Schalldämpfers;
Figur 2
einen Schnitt durch den Schalldämpfer;
Figur 3
einen Schnitt nach Linie A-A der Fig. 2; und
Figur 4
eine vergrößerte Darstellung einer Einzelheit B der Fig. 3.
The invention is explained in more detail with reference to an embodiment shown in the accompanying drawings.
Show it:
Figure 1
a front view of a muffler;
Figure 2
a section through the silencer;
Figure 3
a section along line AA of Fig. 2; and
Figure 4
an enlarged view of a detail B of FIG. 3rd

Der in Fig. 1 gezeigte Schalldämpfer weist ein Gehäuse auf, das von zwei Halbshalen 2, 3 gebildet ist, die entlang ihrer Längsseiten miteinander verbunden sind. Diese Verbindung kann in später noch zu erläuternder Weise durch Falzen der freien Enden der Längsseiten der Halbschalen gebildet sein.The silencer shown in Fig. 1 has a housing which is formed by two half-halves 2, 3 which are connected to one another along their long sides. This connection can be formed in a manner to be explained later by folding the free ends of the long sides of the half-shells.

Im Inneren des Gehäuses ist die eigentliche Schalldämmkammer 4 angeordnet, wobei der zwischen der Außenwandung der Schalldämmkammer 4 und der Innenwandung des Gehäuses 1 vorhandene Raum mit einem schalldämmenden Material 5, beispielsweise einer Dämmatte ausgefüllt ist.The actual sound insulation chamber 4 is arranged in the interior of the housing, the space between the outer wall of the sound insulation chamber 4 and the inner wall of the housing 1 having a sound insulation material 5, for example, an insulation mat is filled.

In den Innenraum der Schalldämmkammer 4 ragen die Enden eines Abgaseintrittsrohres 7 und eines Abgasaustrittsrohres 8. Die Achse des Eintrittsrohres 7 kann dabei aus strömungstechnischen Gründen im Winkel zur Längsachse des Gehäuses verlaufen. Beide Abgasrohre 7, 8 durchdringen die Wandungen sowohl der Schalldämmkammer 4 als auch des Gehäuses 1 und ragen mit ihren anderen Enden ins Freie. Diese beiden Rohrenden bilden gleichzeitig die Anschlußstutzen für die - nicht dargestellten - vom bzw. zum Schalldämpfer führenden Abgasrohre.The ends of an exhaust gas inlet pipe 7 and an exhaust gas outlet pipe 8 protrude into the interior of the sound insulation chamber 4. For reasons of flow technology, the axis of the inlet pipe 7 can be at an angle to the longitudinal axis of the housing. Both exhaust pipes 7, 8 penetrate the walls of both the sound insulation chamber 4 and the housing 1 and project with their other ends into the open. These two pipe ends simultaneously form the connecting pieces for the exhaust pipes, not shown, leading from or to the silencer.

Sowohl das Abgaseintrittsrohr 7 als auch das Abgasaustrittsrohr 8 ist sowohl in seinem das Gehäuse 1 als auch in seinem die Schalldämmkammer 4 durchdringenden Bereich mit dem Gehäuse 1 bzw. der Schalldämmkammer 4 verbunden. Diese Verbindung kann durch Schweißen hergestellt sein und dient der Befestigung der Schalldämmkammer 4 im Inneren des Gehäuses 1.Both the exhaust gas inlet pipe 7 and the exhaust gas outlet pipe 8 are connected to the housing 1 and the sound insulation chamber 4 both in its area penetrating the housing 1 and in its area penetrating the sound insulation chamber 4. This connection can be made by welding and is used to fasten the sound insulation chamber 4 inside the housing 1.

Die Schalldämmkammer 4 ist im Bereich einer ihrer stirnseitigen Wandungen, vorzugsweise im Bereich der den Abgasrohren abgekehrten Wandung mit einer Längsseite 9 eines als Lasche 10 ausgebildeten zusätzlichen Befestigungselementes fest verbunden, dessen andere Längsseite mit dem Gehäuse 1 fest verbunden ist. Das Befestigungselement bzw. die Lasche 10 bildet zusammen mit den mit der Schalldämmkammer 4 fest verbundenen Enden der Abgasrohre 7, 8 eine Dreipunktlagerung, die schwingungsarm ist und die Relativlage von Schalldämmkammer 4 und Gehäuse 1 sichert.The soundproofing chamber 4 is firmly connected in the region of one of its end walls, preferably in the region of the wall facing away from the exhaust pipes, to a long side 9 of an additional fastening element designed as a tab 10, the other long side of which is firmly connected to the housing 1. The fastening element or the tab 10 forms, together with the ends of the exhaust pipes 7, 8 which are fixedly connected to the sound insulation chamber 4, a three-point bearing which is low in vibration and secures the relative position of the sound insulation chamber 4 and the housing 1.

Um einerseits für die Befestigung der Lasche 10 an der Schalldammkammer 4 eine möglichst große Fläche zur Verfügung zu haben, andererseits aber die Übertragung von Körperschall auf ein Minimum zu senken, sind die Längsseiten 9, 11 der Lasche 10 unterschiedlich lang. Die Längsseite 9 erstreckt sich dabei über die gesamte Breite der Schalldämmkammer 4, während die am Gehäuse 1 befestigte Längsseite 11 demgegenüber wesentlich kürzer ausgebildet ist. Die Lasche 10 kann dabei sowohl an der Schalldämmkammer 4 als auch am Gehäuse 1 mittels einer Schweißnaht befestigt sein.In order on the one hand to have the largest possible area available for fastening the tab 10 to the sound insulation chamber 4, but on the other hand to reduce the transmission of structure-borne noise to a minimum, the long sides 9, 11 of the Tab 10 of different lengths. The long side 9 extends over the entire width of the sound insulation chamber 4, while the long side 11 fastened to the housing 1, on the other hand, is substantially shorter. The tab 10 can be fastened to the sound insulation chamber 4 as well as to the housing 1 by means of a weld seam.

In einer bevorzugten Ausführungsform ist (Fig. 4) die Lasche 10 mit der ihr zugekehrten Wandung der Schalldämmkammer 4 einstückig ausgebildet. Sie ragt dabei mit ihrer kurzen Längsseite zwischen die Enden 12 bzw. der beiden Halbschalen 2 bzw. 3 des Gehäuses 1 und kann dadurch ohne einen zusätzlichen Arbeitsgang für ihre Befestigung zu erfordern, beim Verbinden der beiden Halbschalen des Gehäuses durch Falzen mit eingefalzt werden.In a preferred embodiment (FIG. 4), the tab 10 is formed in one piece with the wall of the sound insulation chamber 4 facing it. It protrudes with its short longitudinal side between the ends 12 and the two half-shells 2 and 3 of the housing 1 and can thus be folded in by folding while connecting the two half-shells of the housing without requiring an additional operation for their attachment.

Selbstverständlich ist auch eine andere Befestigungsart der Lasche an der Schalldämmkammer bzw. am Gehäuse möglich, beispielsweise eine solche, bei der sowohl die Schalldämmkammer als auch das Gehäuse einer der Dicke der Lasche entsprechend weite Nut aufweist, wobei die Längen der beiden Nuten an die jeweilige Länge der Längsseiten der Lasche angepaßt sind.Of course, another type of fastening of the tab on the sound insulation chamber or on the housing is possible, for example one in which both the sound insulation chamber and the housing have a groove corresponding to the thickness of the tab, the lengths of the two grooves depending on the length the long sides of the tab are adapted.

Claims (4)

  1. A silencer, preferably for gaseous media, comprising a casing (1), a sound-absorption chamber (4) which is arranged in the interior of the casing (1) and which is surrounded by sound-absorption material (5), and an exhaust gas outlet pipe (8) and an exhaust gas intake pipe (7) respectively passing through the casing (1) and projecting into the interior of the sound-absorption chamber (4), and a fixing element (10) for determining the relative position of the sound-absorption chamber (4) relative to the casing (1), characterised in that the fixing element (10) is in the form of a plate with longitudinal sides (9, 11) of unequal lengths, wherein the longer longitudinal side (9) is fixedly connected to an end wall of the sound-absorption chamber (4) and the shorter longitudinal side (11) is fixedly connected to the inside of the casing (1).
  2. A silencer according to claim 1 characterised in that the plate (10) is provided integrally with the end wall of the sound-absorption chamber (4).
  3. A silencer according to claim 1 having a casing (1) which is formed by two half-shell portions (2, 3) which are connected together by folding along at least one of their longitudinal sides characterised in that the plate (10) extends between the two folded ends (12, 13) of the half-shell portions (2, 3).
  4. A silencer according to claim 1 characterised in that both the end wall of the sound-absorption chamber (4) and also the wall of the casing (1), which is opposite thereto, each have a respective groove whose width corresponds to the thickness of the plate (10) and whose lengths substantially correspond to the length of the longitudinal sides (9, 11) of the plate (10).
EP94102072A 1993-06-05 1994-02-10 Exhaust silencer Expired - Lifetime EP0628705B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9308419U DE9308419U1 (en) 1993-06-05 1993-06-05 Silencer for preferably gaseous media
DE9308419U 1993-06-05

Publications (2)

Publication Number Publication Date
EP0628705A1 EP0628705A1 (en) 1994-12-14
EP0628705B1 true EP0628705B1 (en) 1996-07-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP94102072A Expired - Lifetime EP0628705B1 (en) 1993-06-05 1994-02-10 Exhaust silencer

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EP (1) EP0628705B1 (en)
AT (1) ATE140302T1 (en)
DE (2) DE9308419U1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19608273A1 (en) * 1996-03-05 1997-09-11 Eberspaecher J Gmbh & Co Combined reflection-absorption exhaust silencer in multi-chamber design
DE19627299A1 (en) * 1996-07-06 1998-01-08 Eberspaecher J Gmbh & Co Silencer with outer and inner half shells
ES2165310B1 (en) * 2000-02-25 2003-04-01 Mbk Ind EXHAUST MUFFLER.
DE50110583D1 (en) * 2000-04-14 2006-09-14 Eberspaecher J Gmbh & Co Exhaust silencer in multi-chamber design
DE10058142A1 (en) * 2000-04-14 2001-10-18 Eberspaecher J Gmbh & Co Exhaust silencer in multi-chamber design

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GB1084819A (en) * 1963-11-14 1967-09-27 Gordon Edwardes Lind Walder Improved form of silencer for the exhaust gases from internal combustion engines
FR1472876A (en) * 1966-03-31 1967-03-10 Gillet Kg Heinrich Exhaust silencer for combustion engine
DE2606578A1 (en) * 1976-02-19 1977-08-25 Boysen Friedrich Gmbh Co Kg IC engine exhaust silencer housing - has flanged sections, part folded edge and unfolded edge screw attachment
FR2457969A1 (en) * 1977-07-09 1980-12-26 Harmo Ind Ltd Joint between silencer end cap and outlet pipe - is achieved by forming ridges with expanding mandrel
DE2927758C2 (en) * 1979-07-10 1983-04-28 Audi Nsu Auto Union Ag, 7107 Neckarsulm Exhaust silencers for internal combustion engines
DE3415064A1 (en) * 1984-04-21 1985-10-31 Fa. J. Eberspächer, 7300 Esslingen Process for the manufacture of a silencer
DE3826707A1 (en) * 1988-08-05 1990-02-08 Gruenzweig & Hartmann METHOD FOR PRODUCING AN EXHAUST MUFFLER
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DE9210397U1 (en) * 1992-08-04 1992-10-01 Walker Deutschland GmbH, 6806 Viernheim Exhaust silencer

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DE59400407D1 (en) 1996-08-14
EP0628705A1 (en) 1994-12-14
DE9308419U1 (en) 1994-10-13
ATE140302T1 (en) 1996-07-15

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