EP1239128A1 - Vehicle silencer - Google Patents

Vehicle silencer Download PDF

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Publication number
EP1239128A1
EP1239128A1 EP02003434A EP02003434A EP1239128A1 EP 1239128 A1 EP1239128 A1 EP 1239128A1 EP 02003434 A EP02003434 A EP 02003434A EP 02003434 A EP02003434 A EP 02003434A EP 1239128 A1 EP1239128 A1 EP 1239128A1
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EP
European Patent Office
Prior art keywords
sheet
vent hole
silencer according
silencer
spacers
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.)
Withdrawn
Application number
EP02003434A
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German (de)
French (fr)
Inventor
Peter Ilnseher
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.)
ILNSEHER, PETER
Original Assignee
Zeuna Starker GmbH and Co KG
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Filing date
Publication date
Application filed by Zeuna Starker GmbH and Co KG filed Critical Zeuna Starker GmbH and Co KG
Publication of EP1239128A1 publication Critical patent/EP1239128A1/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Withdrawn legal-status Critical Current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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/16—Selection of particular materials

Definitions

  • the present invention relates to a silencer for the exhaust system of an internal combustion engine Motor vehicle, comprising a housing with a made from a two-layer sheet.
  • the housing shells of modern motor vehicle silencers are often made from a two-layer sheet manufactured, the individual layers of different Material. While the outer, for the mechanical strength designed position mostly a structural steel is used to manufacture the inner layer, exposed to the highly corrosive exhaust gas condensate is, stainless steel is used. Despite the one with the two-ply Structure of the housing shell associated effort such a design is still cheaper than the production of a functionally identical silencer with a single-layer casing made of stainless steel. This depends on the extreme price differences for stainless steel on the one hand and structural steel on the other together.
  • Spacers therefore ensure in particular Areas of strong curvature, as in typical oval Mufflers occur for the possibility of one Gas exchange between the two sheets.
  • the latter was particularly oval in cross-section due to the particularly firm contact of the inner sheet on the outer sheet in the areas of strong curvature the lower area in any case if in this Area neither in the inner sheet nor in the outer sheet a vent hole was intended to be hermetically sealed.
  • the at least one in the inner sheet or in that Outer plate provided vent hole in particular With regard to the salt water and condensate problem can be arranged in an optimized manner. Specifically, this means that with a suitable design of the silencer by the provided according to the invention by the spacers guaranteed air ring gap already one in the inner plate or arranged in the outer plate Vent hole is sufficient to remove gases from any Place between the two sheets by evaporating Manufacturing backlogs arise.
  • That vent hole can, if it is in the Outer sheet is provided on a splash proof Position be arranged; and becomes that vent hole provided in the inner panel, so it can in Area of the upper half of the silencer arranged be so that the penetration of condensate through that Vent hole between the inner panel and the outer panel is excluded.
  • a single vent hole is sufficient to allow the entire space between the inner sheet and the To ventilate the outer sheet, advantageously in that that the area through which in the case of the arrangement of the Vent hole in the outer panel splash water through get between the inner panel and the outer panel can, is minimal.
  • Spacers can be according to a preferred one Further development of the present invention in the form a surface structure of the inner sheet executed his. This is particularly cheap, but not at all mandatory. For example, the execution also comes the spacer in the form of a surface structure of the outer sheet. You can also do both Inner sheet like the outer sheet for producing corresponding Spacers have a suitable surface structure exhibit. Another way of realization the spacer provided according to the invention is between the inner sheet and the outer sheet insert an appropriately structured intermediate layer, for example in the form of a wire mesh. All these other options do not change anything the fact that from a manufacturing point of view Execution of the spacers in the form of a surface structure of the inner sheet proves to be particularly cheap.
  • the surface structure selective elevations of the inner sheet or of the outer sheet includes. This ensures comparatively large channels between the points of contact of the Inner sheet and the outer sheet through which evaporating residues get to the vent hole and can escape through it.
  • the amount of the above specified increases is particularly preferred between 0.5 times and twice the value the thickness of the sheet in question. Here are the increases particularly preferably evenly over that Distributed sheet. Your extension is chosen that it is particularly preferred between 2% and Make up 20% of the surface of the sheet in question.
  • the present can be particularly advantageous Realize the invention in such a silencer of the generic type, whose coat from a flat two-layer sheet metal blank is wound. Across from Half-shell mufflers come here Advantage of the full connection of the area between the two sheets through the continuous Air ring gap especially for wearing.
  • the silencer illustrated in the drawing includes a housing with a jacket 1 and two ends arranged end floors 2.
  • the interior 3 of the Muffler is through two partitions 4 in total divided into three functional chambers.
  • In the middle functional chamber open the upstream end floor and penetrating the neighboring partition Exhaust gas inflow pipe 5 and one on the outflow side End floor and the neighboring partition penetrating exhaust gas discharge pipe 6.
  • the silencer has an oval cross section.
  • the casing 1 of the housing is made of a flat, two-layer Sheet metal blank wrapped.
  • the outer sheet 7 is made relatively thick-walled; it is made of structural steel.
  • the inner sheet 8 is relatively thin-walled performed; it is made of stainless steel.
  • the inner sheet 8 has a surface structure in shape of arranged evenly distributed over the sheet punctiform knobs 9. Those pimples 9 that are about the thickness of the inner panel 8 to the outside raise the rest of the inner panel 10, form spacers 11, through which the inner panel 8 and the Outer sheet 7 to form an air ring gap 12 a defined distance from each other.
  • the air ring gap 12 surrounds the inner sheet 8 above it entire circumferential surface. It is over one in the inner panel 8 provided, in the upper vertex area arranged vent hole 13 in the interior 3 of the Muffler vented into it. Alternatively, there would be ventilation of the air ring gap 12 into the environment via a vent hole arranged in the outer plate 7 into consideration. It is understood that in the area of Front edges 14 of the silencer of the air ring gap 12 is tightly sealed by suitable measures, for example by flared seams, which the end floors 2 and the outer plate 7 of the housing shell 1 with each other connect.

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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)

Abstract

The silencer comprises a housing with a double-layered metal sleeve (1) with an air ring gap (12) formed between the inner plate (8) and outer plate (7) of the sleeve and defined by spacers (11). At least or just one ventilation hole (13) is provided in the inner or outer plate. The spacers can be formed in the surface structure of the inner plate or outer plate.

Description

Die vorliegende Erfindung betrifft einen Schalldämpfer für die Abgasanlage eines verbrennungsmotorisch angetriebenen Kraftfahrzeugs, umfassend ein Gehäuse mit einem aus einem zweilagigen Blech gefertigten Mantel.The present invention relates to a silencer for the exhaust system of an internal combustion engine Motor vehicle, comprising a housing with a made from a two-layer sheet.

Die Gehäusemäntel von modernen Kraftfahrzeugschalldämpfern werden vielfach aus einem zweilagigen Blech hergestellt, dessen einzelne Lagen aus unterschiedlichem Material bestehen. Während die äußere, für die mechanische Festigkeit ausgelegte Lage zumeist aus einem Baustahl besteht, wird zur Herstellung der Innenlage, die dem stark korrosiven Abgas-Kondensat ausgesetzt ist, Edelstahl verwendet. Trotz des mit dem zweilagigen Aufbau des Gehäusemantels verbundenen Aufwands ist eine solche Bauweise noch immer kostengünstiger als die Herstellung eines funktionsgleichen Schalldämpfers mit einem einlagigen, aus Edelstahl bestehenden Gehäusemantel. Dies hängt mit den extremen Preisunterschieden für Edelstahl einerseits und Baustahl andererseits zusammen.The housing shells of modern motor vehicle silencers are often made from a two-layer sheet manufactured, the individual layers of different Material. While the outer, for the mechanical strength designed position mostly a structural steel is used to manufacture the inner layer, exposed to the highly corrosive exhaust gas condensate is, stainless steel is used. Despite the one with the two-ply Structure of the housing shell associated effort such a design is still cheaper than the production of a functionally identical silencer with a single-layer casing made of stainless steel. This depends on the extreme price differences for stainless steel on the one hand and structural steel on the other together.

Ein bei bekannten Kraftfahrzeugschalldämpfern mit einem aus einem zweilagigen Blech gefertigten Mantel immer wieder zu beobachtendes Problem ist die Verformung des (relativ dünnwandigen) Innenblechs in das Innere des Schalldämpfers hinein kurzfristig nach der Inbetriebnahme des Kraftfahrzeugs.One with known motor vehicle silencers always made from a two-layer sheet The problem to be observed again is the deformation of the (relatively thin walled) inner sheet in the interior of the Muffler shortly after commissioning of the motor vehicle.

Hieraus leitet sich die der vorliegenden Erfindung zugrundeliegende Aufgabenstellung ab, die darin besteht, einen Schalldämpfer der eingangs angegebenen Art zu schaffen, bei dem auch bei einer besonders dünnwandigen Ausführung des Innenblechs dieses seine ursprüngliche Form im Betrieb des Kraftfahrzeugs zuverlässig beibehält.This leads to the basis of the present invention Task that consists of a silencer of the type specified at the beginning create, even with a particularly thin-walled Execution of the inner panel this its original Maintains shape reliably in the operation of the motor vehicle.

Gelöst wird diese Aufgabe gemäß der vorliegenden Erfindung dadurch, daß zwischen dem Innenblech und dem Außenblech des Mantels ein durch Abstandshalter definierter Luftringspalt besteht, wobei in dem Innenblech oder in dem Außenblech mindestens ein Entlüftungsloch vorgesehen ist. Von besonderer Bedeutung für den erfindungsgemäßen Schalldämpfer ist somit, daß das Innenblech und das Außenblech des Gehäusemantels über geeignete Abstandshalter großflächig auf einem solchen Abstand zueinander gehalten werden, daß ein zumindest im wesentlichen in Umfangsrichtung durchgehender, ununterbrochener Luftringspalt zwischen den beiden Lagen des Mantels entsteht, welcher über mindestens ein in dem Innenblech oder aber dem Außenblech angeordnetes Entlüftungsloch zum Inneren des Schalldämpfers bzw. in die Umgebung belüftet ist. Die erfindungsgemäß vorgesehenen Abstandshalter sorgen somit insbesondere auch in Bereichen starker Krümmung, wie sie bei typischen ovalen Schalldämpfern vorkommen, für die Möglichkeit eines Gasaustausches zwischen den beiden Blechen. Dies ist ein bedeutender Aspekt des erfindungsgemäßen Schalldämpfers gegenüber bekannten Schalldämpfern mit einem aus einem zweilagigen Blech gefertigten Gehäusemantel. Bei letzteren war insbesondere bei einem ovalen Querschnitt durch die besonders feste Anlage des Innenblechs an dem Außenblech in den Bereichen starker Krümmung der untere Bereich jedenfalls dann, wenn in diesem Bereich weder im Innenblech noch im Außenblech ein Entlüftungsloch vorgesehen war, hermetisch abgekapselt. This object is achieved according to the present invention characterized in that between the inner plate and the Outer sheet of the jacket defined by spacers Air ring gap exists, being in the inner panel or at least one vent hole in the outer sheet is provided. Of particular importance for the invention Muffler is thus that the inner panel and the outer sheet of the housing shell via suitable Spacers over a large area at such a distance to each other that a at least in essentially continuous in the circumferential direction Air ring gap between the two layers of the Coat arises, which over at least one in the Inner plate or vent hole arranged on the outer plate to the inside of the silencer or in the Environment is ventilated. The provided according to the invention Spacers therefore ensure in particular Areas of strong curvature, as in typical oval Mufflers occur for the possibility of one Gas exchange between the two sheets. This is an important aspect of the silencer according to the invention compared to known silencers with a made of a two-layer sheet metal casing. The latter was particularly oval in cross-section due to the particularly firm contact of the inner sheet on the outer sheet in the areas of strong curvature the lower area in any case if in this Area neither in the inner sheet nor in the outer sheet a vent hole was intended to be hermetically sealed.

Dies wird verantwortlich gemacht dafür, daß es nach Inbetriebnahme des Schalldämpfers aufgrund der hohen Betriebstemperaturen zu einer Verdampfung zwischen den beiden Lagen eingeschlossener Rückstände aus dem Fertigungsprozeß (Öl, Wasser, Emulsionen oder dergleichen) und infolge hiervon zu einer starken Druckentwicklung mit der weiter oben beschriebenen Konsequenz der Verformung des Innenblechs in das Innere des Schalldämpfers hinein kam. Die Anordnung von Entlüftungslöchern in der unteren Hälfte des Schalldämpfers hätte indessen zu anderen gravierenden Problemen geführt, indem - bei Anordnung des mindestens einen Entlüftungsloches in dem Innenblech - stark korrosives Kondensat an das nicht korrosionsfeste Außenblech gelangt wäre bzw. - bei Anordnung des mindestens einen Entlüftungslochs im Außenblech - salzhaltiges Spritzwasser durch das betreffende Entlüftungsloch zwischen das Innenblech und das Außenblech gelangt wäre und dort, begünstigt durch die hohen Temperaturen, zu schnell voranschreitenden Korrosionsschäden geführt hätte.This is held responsible for the fact that after commissioning of the silencer due to the high operating temperatures to evaporation between the two layers of trapped residues from the manufacturing process (Oil, water, emulsions or the like) and consequently to a strong pressure development with the consequence of the deformation described above of the inner panel into the interior of the silencer came in. The arrangement of ventilation holes in the lower half of the silencer however, has led to other serious problems in that - When arranging the at least one vent hole in the inner plate - highly corrosive condensate would have reached the non-corrosion-resistant outer sheet or - when arranging the at least one vent hole in the outer panel - saline spray water through the relevant vent hole between the inner panel and the outer sheet would have reached and there, favored due to the high temperatures, progressing too quickly Would have caused corrosion damage.

In Anwendung der vorliegenden Erfindung kann indessen das mindestens eine in dem Innenblech oder aber in dem Außenblech vorgesehene Entlüftungsloch insbesondere im Hinblick auf die Salzwasser- und Kondensatproblematik optimiert angeordnet werden. Konkret heißt dies, daß bei geeigneter Ausführung des Schalldämpfers durch den erfindungsgemäß vorgesehenen, durch die Abstandshalter gewährleisteten Luftringspalt bereits ein einziges in dem Innenblech oder aber in dem Außenblech angeordnetes Entlüftungsloch ausreichend ist, um Gase, die an beliebiger Stelle zwischen den beiden Blechen durch verdampfende Fertigungsrückstände entstehen, abzuführen. Jenes Entlüftungsloch kann dabei, sofern es in dem Außenblech vorgesehen wird, an einer spritzwassergeschützen Position angeordnet sein; und wird jenes Entlüftungsloch im Innenblech vorgesehen, so kann es im Bereich der oberen Hälfte des Schalldämpfers angeordnet werden, so daß das Eindringen von Kondensat durch jenes Entlüftungsloch zwischen das Innenblech und das Außenblech ausgeschlossen ist. Auch wirkt sich der Umstand, daß in Anwendung der vorliegenden Erfindung im allgemeinen ein einziges Entlüftungsloch ausreicht, um den gesamten Zwischenraum zwischen dem Innenblech und dem Außenblech zu belüften, vorteilhaft dahingehend aus, daß die Fläche, durch die im Falle der Anordnung des Entlüftungslochs im Außenblech Spritzwasser hindurch zwischen das Innenblech und das Außenblech gelangen kann, minimal ist.However, using the present invention the at least one in the inner sheet or in that Outer plate provided vent hole in particular With regard to the salt water and condensate problem can be arranged in an optimized manner. Specifically, this means that with a suitable design of the silencer by the provided according to the invention by the spacers guaranteed air ring gap already one in the inner plate or arranged in the outer plate Vent hole is sufficient to remove gases from any Place between the two sheets by evaporating Manufacturing backlogs arise. That vent hole can, if it is in the Outer sheet is provided on a splash proof Position be arranged; and becomes that vent hole provided in the inner panel, so it can in Area of the upper half of the silencer arranged be so that the penetration of condensate through that Vent hole between the inner panel and the outer panel is excluded. The fact also affects that in general using the present invention a single vent hole is sufficient to allow the entire space between the inner sheet and the To ventilate the outer sheet, advantageously in that that the area through which in the case of the arrangement of the Vent hole in the outer panel splash water through get between the inner panel and the outer panel can, is minimal.

Die erfindungsgemäß vorgesehenen, den Luftringspalt definierenden Abstandshalter können gemäß einer bevorzugten Weiterbildung der vorliegenden Erfindung in Form einer Oberflächenstruktur des Innenblechs ausgeführt sein. Dies ist zwar besonders günstig, hingegen keineswegs zwingend. So kommt beispielsweise auch die Ausführung der Abstandshalter in Form einer Oberflächenstruktur des Außenblechs in Betracht. Auch können sowohl das Innenblech wie das Außenblech zur Herstellung entsprechender Abstandshalter eine geeignete Oberflächenstruktur aufweisen. Eine weitere Möglichkeit der Realisierung der erfindungsgemäß vorgesehenen Abstandshalter besteht darin, zwischen das Innenblech und das Außenblech eine entsprechend strukturierte Zwischenlage einzufügen, beispielsweise in Form eines Drahtgeflechts. All diese weiteren Möglichkeiten ändern indessen nichts daran, daß sich unter Herstellungsgesichtspunkten die Ausführung der Abstandshalter in Form einer Oberflächenstruktur des Innenblechs als besonders günstig erweist.The air ring gap defined according to the invention Spacers can be according to a preferred one Further development of the present invention in the form a surface structure of the inner sheet executed his. This is particularly cheap, but not at all mandatory. For example, the execution also comes the spacer in the form of a surface structure of the outer sheet. You can also do both Inner sheet like the outer sheet for producing corresponding Spacers have a suitable surface structure exhibit. Another way of realization the spacer provided according to the invention is between the inner sheet and the outer sheet insert an appropriately structured intermediate layer, for example in the form of a wire mesh. All these other options do not change anything the fact that from a manufacturing point of view Execution of the spacers in the form of a surface structure of the inner sheet proves to be particularly cheap.

Besonders vorteilhaft ist es dabei, wenn die Oberflächenstruktur punktuelle Erhöhungen des Innenblechs bzw. des Außenblechs umfaßt. Dies gewährleistet vergleichsweise große Kanäle zwischen den Berührungspunkten des Innenblechs und des Außenblechs, durch die hindurch verdampfende Reststoffe zu dem Entlüftungsloch gelangen und durch dieses entweichen können. Die Höhe der vorstehend angegebenen Erhöhungen beträgt besonders bevorzugt zwischen dem 0,5-fachen und dem zweifachen Wert der Dicke des betreffenden Blechs. Dabei sind die Erhöhungen besonders bevorzugt gleichmäßig über das betreffende Blech verteilt. Ihre Ausdehnung ist so gewählt, daß sie besonders bevorzugt zwischen 2 % und 20 % der Oberfläche des betreffenden Blechs ausmachen.It is particularly advantageous if the surface structure selective elevations of the inner sheet or of the outer sheet includes. This ensures comparatively large channels between the points of contact of the Inner sheet and the outer sheet through which evaporating residues get to the vent hole and can escape through it. The amount of the above specified increases is particularly preferred between 0.5 times and twice the value the thickness of the sheet in question. Here are the increases particularly preferably evenly over that Distributed sheet. Your extension is chosen that it is particularly preferred between 2% and Make up 20% of the surface of the sheet in question.

Mit besonders großem Vorteil läßt sich die vorliegende Erfindung realisieren bei einem solchen Schalldämpfer der gattungsgemäßen Art, dessen Mantel aus einem ebenen zweilagigen Blechzuschnitt gewickelt ist. Gegenüber Schalldämpfern in Halbschalenbauweise kommt hier der Vorteil der vollumfänglichen Verbindung des Bereichs zwischen den beiden Blechen durch den durchgehenden Luftringspalt besonders zum Tragen.The present can be particularly advantageous Realize the invention in such a silencer of the generic type, whose coat from a flat two-layer sheet metal blank is wound. Across from Half-shell mufflers come here Advantage of the full connection of the area between the two sheets through the continuous Air ring gap especially for wearing.

Es versteht sich, daß über die Länge des Schalldämpfers mehrere der vorstehend erläuterten Luftringspalte angeordnet sein können, die nicht notwendigerweise miteinander in Verbindung stehen müssen. In diesem Falle wäre jeder der isolierten Luftringspalte über ein eigenes Belüftungsloch zu belüften. It is understood that the length of the silencer arranged several of the air ring gaps explained above can be that not necessarily with each other have to be connected. In this case it would be each of the isolated air ring gaps has its own To ventilate the ventilation hole.

Im folgenden wird die vorliegende Erfindung anhand eines in der Zeichnung veranschaulichten bevorzugten Ausführungsbeispiels näher erläutert. Dabei zeigt

Fig. 1
einen schematischen Querschnitt durch einen Abgasschalldämpfer nach der vorliegenden Erfindung,
Fig. 2
einen schematischen Längsschnitt durch den Abgasschalldämpfer nach Figur 1 und
Fig. 3
eine Draufsicht auf das Innenblech des Gehäuses des Schalldämpfers nach den Figuren 1 und 2.
The present invention is explained in more detail below on the basis of a preferred exemplary embodiment illustrated in the drawing. It shows
Fig. 1
2 shows a schematic cross section through an exhaust gas silencer according to the present invention,
Fig. 2
a schematic longitudinal section through the exhaust silencer according to Figure 1 and
Fig. 3
a plan view of the inner plate of the housing of the muffler according to Figures 1 and 2.

Der in der Zeichnung veranschaulichte Schalldämpfer umfaßt ein Gehäuse mit einem Mantel 1 und zwei endseitig angeordneten Abschlußböden 2. Der Innenraum 3 des Schalldämpfers ist durch zwei Trennböden 4 in insgesamt drei Funktionskammern unterteilt. In die mittlere Funktionskammer münden dabei ein den zuströmseitigen Abschlußboden und den benachbarten Trennboden durchsetzendes Abgaszuströmrohr 5 und ein den abströmseitigen Abschlußboden und dem benachbarten Trennboden durchsetzendes Abgasabströmrohr 6.The silencer illustrated in the drawing includes a housing with a jacket 1 and two ends arranged end floors 2. The interior 3 of the Muffler is through two partitions 4 in total divided into three functional chambers. In the middle functional chamber open the upstream end floor and penetrating the neighboring partition Exhaust gas inflow pipe 5 and one on the outflow side End floor and the neighboring partition penetrating exhaust gas discharge pipe 6.

Der Schalldämpfer weist einen ovalen Querschnitt auf. Der Mantel 1 des Gehäuses ist aus einem ebenen, zweilagigen Blechzuschnitt gewickelt. Das Außenblech 7 ist relativ dickwandig ausgeführt; es besteht aus Baustahl. Demgegenüber ist das Innenblech 8 relativ dünnwandig ausgeführt; es besteht aus Edelstahl.The silencer has an oval cross section. The casing 1 of the housing is made of a flat, two-layer Sheet metal blank wrapped. The outer sheet 7 is made relatively thick-walled; it is made of structural steel. In contrast, the inner sheet 8 is relatively thin-walled performed; it is made of stainless steel.

Das Innenblech 8 weist eine Oberflächenstruktur in Form von gleichmäßig über das Blech verteilt angeordneten punktförmigen Noppen 9 auf. Jene Noppen 9, die sich etwa um die Stärke des Innenblechs 8 nach außen gegenüber dem übrigen Innenblech 10 erheben, bilden Abstandshalter 11, durch welche das Innenblech 8 und das Außenblech 7 zur Bildung eines Luftringspalts 12 auf einen definierten Abstand zueinander gebracht werden. Der Luftringspalt 12 umgibt das Innenblech 8 über dessen gesamte Umfangsfläche. Er ist über ein in dem Innenblech 8 vorgesehenes, in dem oberen Scheitelbereich angeordnetes Entlüftungsloch 13 in das Innere 3 des Schalldämpfers hinein entlüftet. Alternativ hierzu käme eine Entlüftung des Luftringspalts 12 in die Umgebung über ein in dem Außenblech 7 angeordnetes Entlüftungsloch in Betracht. Es versteht sich, daß im Bereich der Stirnkanten 14 des Schalldämpfers der Luftringspalt 12 durch geeignete Maßnahmen dicht verschlossen ist, beispielsweise durch Bördelnähte, welche die Abschlußböden 2 und das Außenblech 7 des Gehäusemantels 1 miteinander verbinden.The inner sheet 8 has a surface structure in shape of arranged evenly distributed over the sheet punctiform knobs 9. Those pimples 9 that are about the thickness of the inner panel 8 to the outside raise the rest of the inner panel 10, form spacers 11, through which the inner panel 8 and the Outer sheet 7 to form an air ring gap 12 a defined distance from each other. The air ring gap 12 surrounds the inner sheet 8 above it entire circumferential surface. It is over one in the inner panel 8 provided, in the upper vertex area arranged vent hole 13 in the interior 3 of the Muffler vented into it. Alternatively, there would be ventilation of the air ring gap 12 into the environment via a vent hole arranged in the outer plate 7 into consideration. It is understood that in the area of Front edges 14 of the silencer of the air ring gap 12 is tightly sealed by suitable measures, for example by flared seams, which the end floors 2 and the outer plate 7 of the housing shell 1 with each other connect.

Claims (8)

Schalldämpfer für die Abgasanlage eines verbrennungsmotorisch angetriebenen Kraftfahrzeugs, umfassend ein Gehäuse mit einem aus einem zweilagigen Blech gefertigten Mantel (1), mit den folgenden Merkmalen: Zwischen dem Innenblech (8) und dem Außenblech (7) des Mantels (1) besteht ein durch Abstandshalter (11) definierter Luftringspalt (12); in dem Innenblech (8) oder in dem Außenblech (7) ist mindestens ein Entlüftungsloch (13) vorgesehen. Muffler for the exhaust system of a motor vehicle driven by an internal combustion engine, comprising a housing with a casing (1) made from a two-layer sheet, with the following features: There is an air ring gap (12) defined by spacers (11) between the inner plate (8) and the outer plate (7) of the jacket (1); At least one vent hole (13) is provided in the inner sheet (8) or in the outer sheet (7). Schalldämpfer nach Anspruch 1,
dadurch gekennzeichnet, daß genau ein Entlüftungsloch (13) vorgesehen ist.Silencer according to claim 1,
characterized in that exactly one vent hole (13) is provided. Schalldämpfer nach Anspruch 1 oder Anspruch 2,
dadurch gekennzeichnet, daß das mindestens eine Entlüftungsloch (13) in der oberen Hälfte des Innenblechs (8) bzw. des Außenblechs (7) angeordnet ist.Silencer according to claim 1 or claim 2,
characterized in that the at least one vent hole (13) is arranged in the upper half of the inner plate (8) or the outer plate (7). Schalldämpfer nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß die Abstandshalter (11) in Form einer Oberflächenstruktur des Innenblechs (8) ausgeführt sind.Silencer according to one of claims 1 to 3,
characterized in that the spacers (11) are designed in the form of a surface structure of the inner sheet (8). Schalldämpfer nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß die Abstandshalter (11) in Form einer Oberflächenstruktur des Außenblechs (7) ausgeführt sind. Silencer according to one of claims 1 to 3,
characterized in that the spacers (11) are designed in the form of a surface structure of the outer sheet (7). Schalldämpfer nach Anspruch 4 oder Anspruch 5,
dadurch gekennzeichnet, daß die Oberflächenstruktur punktuelle Erhöhungen (9) des Innenblechs (8) bzw. des Außenblechs (7) umfaßt.Silencer according to claim 4 or claim 5,
characterized in that the surface structure comprises selective elevations (9) of the inner plate (8) or of the outer plate (7). Schalldämpfer nach Anspruch 6,
dadurch gekennzeichnet, daß die Höhe der Erhöhungen (9) zwischen dem 0,5-fachen und dem 2-fachen Wert der Dicke des betreffenden Blechs (7, 8) beträgt.Silencer according to claim 6,
characterized in that the height of the elevations (9) is between 0.5 times and 2 times the thickness of the sheet (7, 8) in question. Schalldämpfer nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß der Mantel (1) aus einem ebenen zweilagigen Blechzuschnitt gewickelt ist.Silencer according to one of claims 1 to 7,
characterized in that the jacket (1) is wound from a flat two-layer sheet metal blank.
EP02003434A 2001-02-17 2002-02-14 Vehicle silencer Withdrawn EP1239128A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10107040 2001-02-17
DE2001107040 DE10107040A1 (en) 2001-02-17 2001-02-17 Silencer for vehicle exhausts has housing with double-layered metal sleeve with air ring gap between sleeves defined by spacers and having ventilation hole in inner or outer plate

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EP1239128A1 true EP1239128A1 (en) 2002-09-11

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US9449592B2 (en) 2013-09-09 2016-09-20 Bosal Emission Control Systems N.V. Muffler shell for use in the exhaust system of a vehicle

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DE202008016200U1 (en) * 2008-12-06 2009-03-12 Heinrich Gillet Gmbh Muffler for exhaust systems

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Publication number Priority date Publication date Assignee Title
DE102008006401A1 (en) * 2008-01-28 2009-07-30 Benteler Automobiltechnik Gmbh Method for producing an exhaust silencer and exhaust silencer
US9449592B2 (en) 2013-09-09 2016-09-20 Bosal Emission Control Systems N.V. Muffler shell for use in the exhaust system of a vehicle

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