EP1888891B2 - Vehicle exhaust muffler and fabrication method - Google Patents

Vehicle exhaust muffler and fabrication method Download PDF

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Publication number
EP1888891B2
EP1888891B2 EP06723855.0A EP06723855A EP1888891B2 EP 1888891 B2 EP1888891 B2 EP 1888891B2 EP 06723855 A EP06723855 A EP 06723855A EP 1888891 B2 EP1888891 B2 EP 1888891B2
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EP
European Patent Office
Prior art keywords
muffler
tube
circumferential wall
insert
wall
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Active
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EP06723855.0A
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German (de)
French (fr)
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EP1888891A1 (en
EP1888891B1 (en
Inventor
Martin Henke
Albert Zahn
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Faurecia Emissions Control Technologies Germany GmbH
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Emcon Technologies Germany Augsburg GmbH
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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
    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49389—Header or manifold making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49398—Muffler, manifold or exhaust pipe making

Definitions

  • the invention relates to a vehicle silencer according to the preamble of claim 1 and to a method for producing an exhaust silencer.
  • the invention particularly relates to a transverse rear silencer.
  • Silencers as far as the production of the peripheral wall is concerned, are subdivided into two types of production, namely shell-type silencers and coil-type silencers.
  • shell-type silencers two deep-drawn sheets are joined together at the edge, while in the winding construction a sheet is wound around a core and closed, then the insert and the outside floors are pushed laterally and then closed axially by folding.
  • the invention relates to a vehicle silencer in wound construction.
  • the gas inlet and the gas outlet are provided on the end walls, optionally on opposite sides or on the same side. It is also known to guide the gas inlet through a peripheral wall in the muffler, wherein the inlet pipes are welded to the peripheral wall with its end.
  • a muffler is known with an inlet and an outlet tube, both tubes are welded to a housing.
  • the US 4,022,291 A describes a muffler with an elongated, tubular housing forming a chamber.
  • An inlet tube leads into the interior of the chamber.
  • Several outlet pipes extend into the chamber and are surrounded by a respective can-shaped housing for improving the damping.
  • the cans are attached to the housing.
  • the US 3,776,366 A1 shows a silencer with a tubular housing.
  • An inlet tube is attached to the housing via a mounting flange.
  • the invention relates to an exhaust muffler, in which the connection between the pipe associated with the peripheral wall and the peripheral wall itself is more stable and less stressed.
  • the tube is thus not exclusively connected via the peripheral wall with the exhaust muffler, but is therefore stored at two spaced locations on and in the exhaust muffler. This also has the advantage that a second outside of the exhaust silencer previously provided vehicle-mounted storage near the peripheral wall can be omitted.
  • the attachment of the tube to the insert is not limited to an axial sliding bearing, which would only act radially to the longitudinal extension of the tube. Rather, the tube is firmly connected in its axial as well as in its radial direction with the insert.
  • the attachment of the tube to the insert by mechanical forming.
  • This type of attachment is less susceptible to corrosion than welding.
  • Other advantages over welders are the lower distortion of the components and the higher strength.
  • a mechanical forming can also be achieved from the inside of the tube, which is advantageous in that the pipe end is not accessible from the outside when previously closed peripheral wall.
  • the tube and the insert are usually pressed together.
  • the insert according to the preferred embodiment has at least one inner end wall for forming a chamber to which a retaining wall is attached, to which in turn the pipe is attached.
  • the retaining wall is fastened between two opposite end walls.
  • a preferred embodiment provides that the insert, to which the pipe is attached, is held in the longitudinal direction of the muffler only through the pipe. This preferred embodiment allows unimpeded thermal expansion of the insert in the axial direction (axially relative to the muffler axis).
  • the invention also includes a method for producing an exhaust muffler with the features of claim 9.
  • FIG. 1 is a transverse, double-flow vehicle exhaust silencer, hereinafter referred to as vehicle muffler or just silencer shown.
  • vehicle muffler has an outer housing, which consists of opposite outer end walls 3, 5 and a peripheral wall 7, which in FIG. 1a is shown simplified.
  • the peripheral wall 7 is wound from a sheet metal part, wherein the outer longitudinal edge 9 is welded to the inner edge portion after winding. Alternatively, the two longitudinal edges may also be connected to each other by folding.
  • the silencer interior can be divided into two halves, namely a left and a right half. These halves are separated by end walls 11, 13, which are axially spaced from each other.
  • the left half has further, provided with flow openings 15 end walls 17, 19, which divide the left half in a total of three chambers 34, 36, 37.
  • An outlet tube 21, 39 in each half is provided with openings, not shown, on the outer periphery and protrudes through the end walls 3, 5, 17 and 19 therethrough, wherein it is at least welded to the end wall 3 and 5 respectively.
  • a retaining wall 23 is arranged made of sheet metal, which is welded to the end walls 11, 19.
  • the end wall 19 is connected via further connecting pipes 25, 27 of different cross-section with the end walls 3 and 17.
  • the retaining wall 23 has, as in FIG. 2 Good to see, cruciform embossments 29, which increase their stability.
  • An inlet pipe 31 protrudes through an opening in the peripheral wall 7 (see FIG. 2 ) and is welded to this over the entire tube circumference.
  • the inlet pipe 31 extends further into the silencer interior and also protrudes through a relatively precisely fitting opening in the retaining wall 23 (see also FIGS. 4 and 5 ).
  • the retaining wall has in the region of the passage opening for the inlet pipe 31 a sleeve-shaped edge 33 produced by plastic deformation.
  • FIGS. 1 and 2 It can be seen that in the left half of the inlet pipe 31 ends shortly after passing through the retaining wall 23. At a distance from it starts a connecting pipe 27 with a 90 ° -Abwinklung.
  • the tube 27 extends through aligned flow openings 15 of the end walls 17, 19th
  • the inlet pipe 31 of the right strand opens into a thicker connecting pipe 35, which leads into a middle chamber 37.
  • the outlet pipe 39 of the right-hand strand also opens into this middle chamber 37.
  • further tubes 25 are provided between the end walls 5, 13, 17, 19 in the right-hand strand, with corresponding end walls carrying the reference numerals already introduced for the left half. Some of the tubes 25 may be formed as non-gas flowed stabilization rods between the end walls.
  • outlet tube 39 protrudes through the outer end wall 5 and is welded thereto.
  • outlet pipes 21, 39 are outside so-called tail pipes 41 inserted.
  • These also have an outwardly facing flared end into which so-called intermediate pipes 43 are inserted.
  • the inserts are made consisting of the inner end walls and the connecting tubes and the retaining wall 23 and connected to the outer end walls 3, 5.
  • a sheet is wrapped around a core and, as in FIG. 1a represented, welded.
  • the openings for the passage of the inlet pipes 31 are already provided.
  • the inserts from both sides are axially inserted into the peripheral wall 7, the so-called shell, and the end walls 3, 5 are connected to the jacket 7.
  • the inlet pipes 31 are inserted through the openings in the peripheral wall 7 until they also protrude through the corresponding openings in the retaining walls 23.
  • the inlet pipes 31 are attached to the associated retaining walls 23, by mechanical forming.
  • a tool e.g. a kind of embossing tool or circulating rollers, in the interior of the corresponding tube 31 a.
  • the tube 31 is e.g. plastically deformed on the entire circumference of the tube in the region of the sleeve-like edge 33 to form a groove, wherein the edge 33 is deformed.
  • Tube 31 and retaining wall 23 are connected in this way axially and radially positively and non-positively connected and pressed.
  • FIG. 4 is also the bead-like extension 53, which has formed in the slender wall 23, easy to recognize.
  • tube 31 and retaining wall 23 can also be pressed together in segments, as in FIG. 5 shown.
  • the tube 31 has been pressed outward only on a few sections 55, which are circumferentially spaced from each other, forming beads 53 in the edge 33.
  • FIG. 6 is schematically an alternative to in the FIGS. 4 and 5 shown forming shown.
  • the difference to the embodiment of FIGS. 4 and 5 is that the tube 31 seen axially before and behind the edge 33 plastically outward, ie in the radial Direction, being deformed. In this case, the edge 33 is not deformed. The resulting beads secure the edge 33 in the axial direction. It is also possible, the pipe 31 only partially, similar to in FIG. 5 shown to deform before and after the edge 33.
  • Another possibility of forming is, e.g. the end of the tube 31 projecting through the opening to crimp end-to-end, resulting in a securing in an axial direction.
  • FIG. 3 essentially corresponds to the embodiment shown in the figures described so far, so that in the following only the differences must be addressed. Functionally identical parts receive the previously introduced reference numerals.
  • this transverse exhaust muffler is provided with a wound peripheral wall 7.
  • the muffler is single-flow and has only one central inlet tube 31.
  • This inlet tube 31 is, as in the aforementioned embodiments, welded to the peripheral wall 7 and projects through this and through the retaining wall 23 therethrough. After the retaining wall 23, the tube 31 is widened, namely on the circumference at a plurality of spaced-apart portions 55. A sleeve-like edge 33 may be omitted here, which otherwise also applies to the aforementioned embodiment.
  • the central insert in the silencer interior consists of the end walls 11, 19, the retaining wall 23 and connecting pipes or corresponding rods 25. This insert is positioned in the axial direction A only through the inlet pipe 31.
  • the outlet pipe 39 protrudes with a sliding fit through the end wall 19.
  • the outlet pipes 21, 39 can also pass through the peripheral wall 7.
  • the retaining wall 23 is preferably aligned at right angles to the longitudinal axis X of the inlet tube 31 passing through it.

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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)

Description

Die Erfindung betrifft einen Fahrzeugschalldämpfer nach dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zur Herstellung eines Abgasschalldämpfers.The invention relates to a vehicle silencer according to the preamble of claim 1 and to a method for producing an exhaust silencer.

Die Erfindung betrifft insbesondere einen querliegenden Nachschalldämpfer. Schalldämpfer werden, was die Herstellung der Umfangswand anbelangt, in zwei Herstellungsarten unterteilt, nämlich Schalldämpfer in Schalenbauweise und solche in Wickelbauweise. Bei der Schalenbauweise werden zwei tiefgezogene Bleche randseitig miteinander verbunden, während bei der Wickelbauweise ein Blech um einen Kern gewickelt und geschlossen wird, anschließend der Einsatz und die Außenböden seitlich eingeschoben werden und dann axial durch Falzen geschlossen wird.The invention particularly relates to a transverse rear silencer. Silencers, as far as the production of the peripheral wall is concerned, are subdivided into two types of production, namely shell-type silencers and coil-type silencers. In the shell construction, two deep-drawn sheets are joined together at the edge, while in the winding construction a sheet is wound around a core and closed, then the insert and the outside floors are pushed laterally and then closed axially by folding.

Die Erfindung betrifft einen Fahrzeugschalldämpfer in Wickelbauweise. Üblicherweise sind der Gaseinlaß und der Gasauslaß an den Stirnwänden vorgesehen, und zwar wahlweise an einander gegenüberliegenden Seiten oder an derselben Seite. Auch bekannt ist, den Gaseinlaß durch eine Umfangswand in den Schalldämpfer zu führen, wobei die Einlaßrohre an der Umfangswand mit ihrem Ende verschweißt sind.The invention relates to a vehicle silencer in wound construction. Usually, the gas inlet and the gas outlet are provided on the end walls, optionally on opposite sides or on the same side. It is also known to guide the gas inlet through a peripheral wall in the muffler, wherein the inlet pipes are welded to the peripheral wall with its end.

Aus der US 2,739,661 A ist ein Schalldämpfer bekannt mit einem Einlaß- und einem Auslaßrohr, wobei beide Rohre an einem Gehäuse angeschweißt sind.From the US 2,739,661 A a muffler is known with an inlet and an outlet tube, both tubes are welded to a housing.

Die US 4,022,291 A beschreibt einen Schalldämpfer mit einem länglichen, rohrförmigen Gehäuse, das eine Kammer bildet. Ein Einlaßrohr führt in das Innere der Kammer. Mehrere Auslaßrohre erstrecken sich in die Kammer und sind dort von je einem dosenförmigen Gehäuse zur Verbesserung der Dämpfung umgeben. Die Dosen sind am Gehäuse befestigt.The US 4,022,291 A describes a muffler with an elongated, tubular housing forming a chamber. An inlet tube leads into the interior of the chamber. Several outlet pipes extend into the chamber and are surrounded by a respective can-shaped housing for improving the damping. The cans are attached to the housing.

Die US 3,776,366 A1 zeigt einen Schalldämpfer mit einem rohrförmigen Gehäuse. Ein Einlaßrohr ist über einen Befestigungsflansch an dem Gehäuse angebracht.The US 3,776,366 A1 shows a silencer with a tubular housing. An inlet tube is attached to the housing via a mounting flange.

Die Erfindung betrifft einen Abgasschalldämpfer, bei dem die Verbindung zwischen dem der Umfangswand zugeordneten Rohr und der Umfangswand selbst stabiler und weniger belastet ist.The invention relates to an exhaust muffler, in which the connection between the pipe associated with the peripheral wall and the peripheral wall itself is more stable and less stressed.

Dies wird bei einem Abgasschalldämpfer der eingangs genannten Art mit den Merkmalen des Anspruchs 1 erreicht. Das Rohr ist damit nicht ausschließlich über die Umfangswand mit dem Abgasschalldämpfer verbunden, sondern wird folglich an zwei voneinander beabstandeten Stellen am und im Abgasschalldämpfer gelagert. Dies hat auch den Vorteil, daß eine zweite außerhalb des Abgasschalldämpfers bislang vorgesehene fahrzeugseitige Lagerung nahe der Umfangswand entfallen kann. Die Befestigung des Rohres am Einsatz ist nicht auf eine axiale Gleitlagerung, die nur radial zur Längserstreckung des Rohres wirken würde, beschränkt. Vielmehr ist das Rohr in seiner axialen wie in seiner radialen Richtung mit dem Einsatz fest verbunden.This is achieved with an exhaust silencer of the type mentioned with the features of claim 1. The tube is thus not exclusively connected via the peripheral wall with the exhaust muffler, but is therefore stored at two spaced locations on and in the exhaust muffler. This also has the advantage that a second outside of the exhaust silencer previously provided vehicle-mounted storage near the peripheral wall can be omitted. The attachment of the tube to the insert is not limited to an axial sliding bearing, which would only act radially to the longitudinal extension of the tube. Rather, the tube is firmly connected in its axial as well as in its radial direction with the insert.

Erfindungsgemäß erfolgt die Befestigung des Rohres am Einsatz durch mechanisches Umformen. Diese Befestigungsart ist weniger korrosionsanfällig als Schweißen. Weitere Vorteile gegenüber Schweißer sind der geringere Verzug der Bauteile und die höhere Festigkeit.According to the invention, the attachment of the tube to the insert by mechanical forming. This type of attachment is less susceptible to corrosion than welding. Other advantages over welders are the lower distortion of the components and the higher strength.

Ein mechanisches Umformen läßt sich auch vom Rohrinneren aus erreichen, was dahingehend vorteilhaft ist, daß das Rohrende bei zuvor geschlossener Umfangswand von außerhalb nicht mehr zugänglich ist.A mechanical forming can also be achieved from the inside of the tube, which is advantageous in that the pipe end is not accessible from the outside when previously closed peripheral wall.

Das Rohr und der Einsatz werden üblicherweise miteinander verpreßt.The tube and the insert are usually pressed together.

Es bietet sich an, das gesamte Rohr auf seinem Umfang im Bereich der Anlagefläche am Einsatz mit diesem zu verbinden. Alternativ ist auch ein segmentweises Verbinden des Umfangs möglich.It is advisable to connect the entire tube on its circumference in the area of the contact surface on the insert with this. Alternatively, a segment-wise connection of the circumference is possible.

Der Einsatz hat gemäß der bevorzugten Ausführungsform wenigstens eine innere Stirnwand zur Bildung einer Kammer, an der eine Haltewand befestigt ist, an welcher wiederum das Rohr angebracht ist. Üblicherweise liegt die Haltewand jedoch befestigt zwischen zwei gegenüberliegenden Stirnwänden.The insert according to the preferred embodiment has at least one inner end wall for forming a chamber to which a retaining wall is attached, to which in turn the pipe is attached. Usually, however, the retaining wall is fastened between two opposite end walls.

Eine bevorzugte Ausführungsform sieht vor, daß der Einsatz, an dem das Rohr befestigt ist, in Längsrichtung des Schalldämpfers nur durch das Rohr gehalten ist. Diese bevorzugte Ausführungsform erlaubt eine ungehinderte Wärmedehnung des Einsatzes in axialer Richtung (axial bezogen auf die Schalldämpferachse).A preferred embodiment provides that the insert, to which the pipe is attached, is held in the longitudinal direction of the muffler only through the pipe. This preferred embodiment allows unimpeded thermal expansion of the insert in the axial direction (axially relative to the muffler axis).

Es sind jedoch auch mehr als ein über die Umfangswand mit dem Schalldämpferinneren gekoppeltes Rohr möglich, sogenannte mehrflutige Systeme (insbesondere 2- und 4-flutige Systeme). Hier sieht die Erfindung z.B. vor, die beiden in das Innere hineinragenden Rohre an ihren freien Endstücken an zwei nebeneinanderliegenden Einsätzen zu befestigen.However, more than one pipe coupled to the silencer interior via the peripheral wall is possible, so-called multi-flow systems (in particular 2- and 4-pipe systems). Here, the invention sees e.g. to attach the two projecting into the interior tubes at their free end pieces on two adjacent inserts.

Darüber hinaus umfasst die Erfindung auch ein Verfahren zur Herstellung eines Abgasschalldämpfers mit den Merkmalen des Anspruchs 9.In addition, the invention also includes a method for producing an exhaust muffler with the features of claim 9.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung und aus den nachfolgenden Zeichnungen, auf die Bezug genommen wird. In den Zeichnungen zeigen:

  • Figur 1 eine Explosionsansicht einer zweiflutigen Ausführungsform des erfindungsgemäßen Fahrzeugschalldämpfers,
  • Figur la eine Prinzipskizze der Umfangswand des erfindungsgemäßen Schalldämpfers,
  • Figur 2 eine vergrößerte Ansicht des mittleren Bereichs des Schalldämpfers nach Figur 1,
  • Figur 3 eine Ansicht, teilweise im Schnitt, eines einflutigen Schalldämpfers nach der Erfindung,
  • Figuren 4 und 5 Schnittansichten durch den Bereich der Anbindung des Einlaßrohres an den Einsatz gemäß zwei verschiedener AusfÜhrungsformen; und
  • Figur 6 schematisch einen Schnitt durch den Bereich der Anbindung des Einlaßrohres an den Einsatz gemäß einer alternativen Ausführungsform.
Further features and advantages of the invention will become apparent from the following description and from the following drawings, to which reference is made. In the drawings show:
  • FIG. 1 an exploded view of a twin-flow embodiment of the vehicle muffler according to the invention,
  • FIG. 1 a shows a schematic diagram of the peripheral wall of the silencer according to the invention,
  • FIG. 2 an enlarged view of the central area of the muffler after FIG. 1 .
  • FIG. 3 a view, partly in section, of a single-flow muffler according to the invention,
  • FIGS. 4 and 5 Sectional views through the region of the connection of the inlet tube to the insert according to two different embodiments; and
  • FIG. 6 schematically a section through the region of the connection of the inlet tube to the insert according to an alternative embodiment.

In Figur 1 ist ein querliegender, zweiflutiger Fahrzeugabgasschalldämpfer, im folgenden kurz Fahrzeugschalldämpfer oder nur Schalldämpfer genannt, dargestellt. Der Schalldämpfer hat ein Außengehäuse, welches aus entgegengesetzten äußeren Stirnwänden 3, 5 und einer Umfangswand 7 besteht, welche in Figur 1a vereinfacht dargestellt ist. Die Umfangswand 7 wird aus einem Blechteil gewickelt, wobei der außenliegende Längsrand 9 mit dem innenliegenden Randabschnitt nach dem Wickeln verschweißt wird. Alternativ können die beiden Längsränder auch durch Falzen miteinander verbunden sein.In FIG. 1 is a transverse, double-flow vehicle exhaust silencer, hereinafter referred to as vehicle muffler or just silencer shown. The muffler has an outer housing, which consists of opposite outer end walls 3, 5 and a peripheral wall 7, which in FIG. 1a is shown simplified. The peripheral wall 7 is wound from a sheet metal part, wherein the outer longitudinal edge 9 is welded to the inner edge portion after winding. Alternatively, the two longitudinal edges may also be connected to each other by folding.

In Figur 1 ist die Umfangswand zur besseren Sichtbarkeit des Schalldämpferinneren weggelassen. Das Schalldämpferinnere kann in zwei Hälften unterteilt werden, nämlich in eine linke und eine rechte Hälfte. Diese Hälften sind durch Stirnwände 11, 13, welche axial einen Abstand voneinander haben, getrennt. Die linke Hälfte hat weitere, mit Durchströmöffnungen 15 versehene Stirnwände 17, 19, die die linke Hälfte in insgesamt drei Kammern 34, 36, 37 unterteilen. Ein Auslaßrohr 21, 39 in jeder Hälfte ist mit nicht dargestellten Öffnungen am Außenumfang versehen und ragt durch die Stirnwände 3, 5, 17 und 19 hindurch, wobei es zumindest an der Stirnwand 3 bzw. 5 angeschweißt ist. Zwischen den Stirnwänden 11, 19 ist eine Haltewand 23 aus Blech angeordnet, welche an den Stirnwänden 11, 19 angeschweißt ist.In FIG. 1 the peripheral wall is omitted for better visibility of the silencer interior. The silencer interior can be divided into two halves, namely a left and a right half. These halves are separated by end walls 11, 13, which are axially spaced from each other. The left half has further, provided with flow openings 15 end walls 17, 19, which divide the left half in a total of three chambers 34, 36, 37. An outlet tube 21, 39 in each half is provided with openings, not shown, on the outer periphery and protrudes through the end walls 3, 5, 17 and 19 therethrough, wherein it is at least welded to the end wall 3 and 5 respectively. Between the end walls 11, 19, a retaining wall 23 is arranged made of sheet metal, which is welded to the end walls 11, 19.

Wie in Figur 2 zu erkennen ist, ist die Stirnwand 19 über weitere Verbindungsrohre 25, 27 unterschiedlichen Querschnitts mit den Stirnwänden 3 und 17 verbunden. Die Stirnwände 17, 19, 11 bilden zusammen mit den Rohren 25, 27 und der Haltewand 23 einen Schalldämpfereinsatz, welcher vom Blechteil umgeben wird.As in FIG. 2 can be seen, the end wall 19 is connected via further connecting pipes 25, 27 of different cross-section with the end walls 3 and 17. The end walls 17, 19, 11 together with the tubes 25, 27 and the retaining wall 23 a muffler insert, which is surrounded by the sheet metal part.

Die Haltewand 23 hat, wie in Figur 2 gut zu sehen ist, kreuzförmige Einprägungen 29, die ihre Stabilität erhöhen. Ein Einlaßrohr 31 ragt durch eine Öffnung in der Umfangswand 7 (siehe Figur 2) und ist an dieser über den gesamten Rohrumfang angeschweißt. Das Einlaßrohr 31 erstreckt sich weiter in das Schalldämpferinnere und ragt auch noch durch eine relativ paßgenaue Öffnung in der Haltewand 23 hindurch (siehe auch Figuren 4 und 5). Die Haltewand hat im Bereich der Durchtrittsöffnung für das Einlaßrohr 31 einen hülsenförmigen, durch plastisches Umformen erzeugten Rand 33.The retaining wall 23 has, as in FIG. 2 Good to see, cruciform embossments 29, which increase their stability. An inlet pipe 31 protrudes through an opening in the peripheral wall 7 (see FIG. 2 ) and is welded to this over the entire tube circumference. The inlet pipe 31 extends further into the silencer interior and also protrudes through a relatively precisely fitting opening in the retaining wall 23 (see also FIGS. 4 and 5 ). The retaining wall has in the region of the passage opening for the inlet pipe 31 a sleeve-shaped edge 33 produced by plastic deformation.

In den Figuren 1 und 2 ist zu erkennen, daß in der linken Hälfte das Einlaßrohr 31 kurz nach Durchtritt durch die Haltewand 23 endet. Mit einem Abstand davon beginnt ein Verbindungsrohr 27 mit einer 90°-Abwinklung. Das Rohr 27 erstreckt sich durch fluchtende Durchströmöffnungen 15 der Stirnwände 17, 19.In the FIGS. 1 and 2 It can be seen that in the left half of the inlet pipe 31 ends shortly after passing through the retaining wall 23. At a distance from it starts a connecting pipe 27 with a 90 ° -Abwinklung. The tube 27 extends through aligned flow openings 15 of the end walls 17, 19th

Wie aus dem Vergleich zwischen der linken und der rechten Hälfte zu erkennen ist, mündet das Einlaßrohr 31 des rechten Stranges in ein dickeres Verbindungsrohr 35, welches in eine mittlere Kammer 37 führt. Das Auslaßrohr 39 des rechten Stranges mündet ebenfalls in diese mittlere Kammer 37. Darüber hinaus sind auch im rechten Strang weitere Rohre 25 zwischen den Stirnwänden 5, 13, 17, 19 vorgesehen, wobei entsprechende Stirnwände die bereits für die linke Hälfte eingeführten Bezugszeichen tragen. Einige der Rohre 25 können als nicht gasdurchströmte Stabilisierungsstangen zwischen den Stirnwänden ausgebildet sein.As can be seen from the comparison between the left and the right half, the inlet pipe 31 of the right strand opens into a thicker connecting pipe 35, which leads into a middle chamber 37. The outlet pipe 39 of the right-hand strand also opens into this middle chamber 37. In addition, further tubes 25 are provided between the end walls 5, 13, 17, 19 in the right-hand strand, with corresponding end walls carrying the reference numerals already introduced for the left half. Some of the tubes 25 may be formed as non-gas flowed stabilization rods between the end walls.

Auch das Auslaßrohr 39 ragt durch die äußere Stirnwand 5 hindurch und ist an dieser angeschweißt. In die aufgeweiteten Enden der. Auslaßrohre 21, 39 werden außenseitig sogenannte Endrohre 41 gesteckt. Entsprechendes gilt für die Einlaßrohre 31. Auch diese haben ein nach außen gewandtes aufgeweitetes Ende, in das sogenannte Zwischenrohre 43 gesteckt werden.Also, the outlet tube 39 protrudes through the outer end wall 5 and is welded thereto. In the flared ends of the. Outlet pipes 21, 39 are outside so-called tail pipes 41 inserted. The same applies to the inlet pipes 31. These also have an outwardly facing flared end into which so-called intermediate pipes 43 are inserted.

Die Herstellung des erfindungsgemäßen Abgasschalldämpfers wird im folgenden erläutert. Zuerst werden die Einsätze bestehend aus den innenliegenden Stirnwänden und den Verbindungsrohren sowie der Haltewand 23 hergestellt und mit den äußeren Stirnwänden 3, 5 verbunden. Ein Blech wird um einen Kern gewickelt und, wie in Figur 1a dargestellt, verschweißt. In der Umfangswand 7 sind bereits die Öffnungen zum Durchtritt der Einlaßrohre 31 vorgesehen. Anschließend werden die Einsätze von beiden Seiten axial in die Umfangswand 7, den sogenannten Mantel, eingeschoben, und die Stirnwände 3, 5 werden mit dem Mantel 7 verbunden.The production of the exhaust muffler according to the invention will be explained below. First, the inserts are made consisting of the inner end walls and the connecting tubes and the retaining wall 23 and connected to the outer end walls 3, 5. A sheet is wrapped around a core and, as in FIG. 1a represented, welded. In the peripheral wall 7, the openings for the passage of the inlet pipes 31 are already provided. Subsequently, the inserts from both sides are axially inserted into the peripheral wall 7, the so-called shell, and the end walls 3, 5 are connected to the jacket 7.

Die Einlaßrohre 31 werden durch die Öffnungen in der Umfangswand 7 hindurchgesteckt, bis sie auch durch die entsprechenden Öffnungen in den Haltewänden 23 ragen.The inlet pipes 31 are inserted through the openings in the peripheral wall 7 until they also protrude through the corresponding openings in the retaining walls 23.

Anschließend werden die Einlaßrohre 31 mit den zugeordneten Haltewänden 23 befestigt, und zwar durch mechanisches Umformen. Hierzu dringt ein Werkzeug, z.B. eine Art Prägewerkzeug oder zirkulierende Rollen, in das Innere des entsprechenden Rohres 31 ein. Das Rohr 31 wird z.B. auf dem gesamten Rohrumfang im Bereich des hülsenartigen Randes 33 nach außen plastisch unter Bildung einer Nut verformt, wobei der Rand 33 umgeformt wird. Rohr 31 und - Haltewand 23 werden auf diese Weise axial und radial miteinander form- und kraftschlüssig verbunden und verpreßt.Subsequently, the inlet pipes 31 are attached to the associated retaining walls 23, by mechanical forming. For this a tool, e.g. a kind of embossing tool or circulating rollers, in the interior of the corresponding tube 31 a. The tube 31 is e.g. plastically deformed on the entire circumference of the tube in the region of the sleeve-like edge 33 to form a groove, wherein the edge 33 is deformed. Tube 31 and retaining wall 23 are connected in this way axially and radially positively and non-positively connected and pressed.

Die zwischen den beiden verformten Abschnitten bildende Nut trägt das Bezugszeichen 51. In Figur 4 ist auch der wulstartige Fortsatz 53, der sich in der Hältewand 23 gebildet hat, gut zu erkennen.The groove forming between the two deformed sections bears the reference numeral 51 FIG. 4 is also the bead-like extension 53, which has formed in the slender wall 23, easy to recognize.

Anstatt einer geschlossen umlaufenden Nut 51 können Rohr 31 und Haltewand 23 auch segmentweise miteinander verpreßt werden, wie in Figur 5 dargestellt. Hier wurde das Rohr 31 nur an wenigen Abschnitten 55, die umfangsmäßig voneinander beabstandet sind, nach außen gedrückt, unter Bildung von Wülsten 53 im Rand 33.Instead of a closed circumferential groove 51 tube 31 and retaining wall 23 can also be pressed together in segments, as in FIG. 5 shown. Here, the tube 31 has been pressed outward only on a few sections 55, which are circumferentially spaced from each other, forming beads 53 in the edge 33.

Zur radialen Sicherung kann auch eine Preßpassung zwischen den beiden Teilen vorgesehen sein.For radial securing and an interference fit between the two parts can be provided.

In Figur 6 ist schematisch eine Alternative zum in den Figuren 4 und 5 gezeigten Umformen gezeigt. Der Unterschied zu den Ausführungsform der Figuren 4 und 5 besteht darin, daß das Rohr 31 axial gesehen vor und hinter dem Rand 33 plastisch nach außen, also in radialer Richtung, verformt wird. Dabei wird der Rand 33 nicht verformt. Die sich ergebenden Wülste sichern den Rand 33 in axialer Richtung. Es ist auch möglich, das Rohr 31 nur abschnittsweise, ähnlich wie in Figur 5 gezeigt, vor und nach dem Rand 33 zu verformen.In FIG. 6 is schematically an alternative to in the FIGS. 4 and 5 shown forming shown. The difference to the embodiment of FIGS. 4 and 5 is that the tube 31 seen axially before and behind the edge 33 plastically outward, ie in the radial Direction, being deformed. In this case, the edge 33 is not deformed. The resulting beads secure the edge 33 in the axial direction. It is also possible, the pipe 31 only partially, similar to in FIG. 5 shown to deform before and after the edge 33.

Eine andere Möglichkeit der Umformung besteht darin, z.B. das durch die Öffnung hindurchragende freie Endstück des Rohres 31 endseitig nach außen umzubördeln, was zu einer Sicherung in einer axialen Richtung führt.Another possibility of forming is, e.g. the end of the tube 31 projecting through the opening to crimp end-to-end, resulting in a securing in an axial direction.

Die Ausführungsfonn nach Figur 3 entspricht im wesentlichen der in den bislang beschriebenen Figuren gezeigten Ausführungsform, so daß im folgenden nur noch auf die Unterschiede eingegangen werden muß. Funktionsgleiche Teile erhalten die zuvor schon eingeführten Bezugszeichen.The Ausführungsfonn after FIG. 3 essentially corresponds to the embodiment shown in the figures described so far, so that in the following only the differences must be addressed. Functionally identical parts receive the previously introduced reference numerals.

Auch dieser querliegende Abgasschalldämpfer ist mit einer gewickelten Umfangswand 7 versehen. Der Schalldämpfer ist einflutig und besitzt nur ein zentrales Einlaßrohr 31. Dieses Einlaßrohr 31 ist, ebenso wie bei den zuvor erwähnten Ausführungsbeispielen, an der Umfangswand 7 angeschweißt und ragt durch diese und durch die Haltewand 23 hindurch. Nach der Haltewand 23 ist das Rohr 31 aufgeweitet, und zwar am Umfang an mehreren voneinander beabstandeten Abschnitten 55. Ein -hülsenartiger Rand 33 kann hier gegebenenfalls entfallen, was im übrigen auch für die zuvor erwähnte Ausführungsform gilt. Der zentrale Einsatz im Schalldämpferinneren besteht aus den Stirnwänden 11, 19, der Haltewand 23 sowie Verbindungsrohren oder entsprechenden -Stangen 25. Dieser Einsatz ist in axialer Richtung A nur durch das Einlaßrohr 31 positioniert. Das Auslaßrohr 39 ragt mit einem Schiebesitz durch die Stirnwand 19. Durch diese Ausbildung werden auf die Wände bei der Erwärmung und Abkühlung des Schalldämpfers geringere Kräfte ausgeübt, folglich sind sämtliche Einzelteile weniger Spannungen ausgesetzt, was auch für die Schweißnähte zur Befestigung der Rohre 21, 31, 39, 41 gilt.Also, this transverse exhaust muffler is provided with a wound peripheral wall 7. The muffler is single-flow and has only one central inlet tube 31. This inlet tube 31 is, as in the aforementioned embodiments, welded to the peripheral wall 7 and projects through this and through the retaining wall 23 therethrough. After the retaining wall 23, the tube 31 is widened, namely on the circumference at a plurality of spaced-apart portions 55. A sleeve-like edge 33 may be omitted here, which otherwise also applies to the aforementioned embodiment. The central insert in the silencer interior consists of the end walls 11, 19, the retaining wall 23 and connecting pipes or corresponding rods 25. This insert is positioned in the axial direction A only through the inlet pipe 31. The outlet pipe 39 protrudes with a sliding fit through the end wall 19. By this training lower forces are exerted on the walls during the heating and cooling of the muffler, consequently, all items are exposed to less stress, which also for the welds for fixing the tubes 21, 31st , 39, 41 applies.

Anstatt des Einlaßrohres 31 können natürlich auch die Auslaßrohre 21, 39 durch die Umfangswand 7 hindurchtreten.Of course, instead of the inlet pipe 31, the outlet pipes 21, 39 can also pass through the peripheral wall 7.

Die Haltewand 23 ist vorzugsweise im rechten Winkel zur Längsachse X des durch sie hindurchtretenden Einlaßrohres 31 ausgerichtet.The retaining wall 23 is preferably aligned at right angles to the longitudinal axis X of the inlet tube 31 passing through it.

Claims (10)

  1. A vehicle muffler, comprising
    opposite outer end walls (3, 5),
    a closed outer circumferential wall (7) formed by coiling a sheet metal part,
    at least one muffler insert,
    at least one inlet tube (31), and
    at least one outlet tube (21, 39),
    one of the tubes (31) extending through the circumferential wall (7) into the muffler interior and being fastened to the circumferential wall (7) and the muffler insert,
    characterized in that
    the tube (31) which extends through the circumferential wall (7) is fastened to the muffler insert by mechanical deformation, and that
    the tube (31) which protrudes through an opening in the circumferential wall (7) is welded to the circumferential wall (7) over the entire circumference of the tube.
  2. The vehicle muffler according to claim 1, characterized in that the tube (31) which extends through the circumferential wall (7) and the muffler insert are press-fitted with each other.
  3. The vehicle muffler according to claim 1 or 2, characterized in that the tube (31) which extends through the circumferential wall (7) is connected with the muffler insert along an entire circumference of the tube.
  4. The vehicle muffler according to any of the preceding claims, characterized in that the tube (31) which extends through the circumferential wall (7) is mechanically deformed starting from the tube interior, in order to be connected with the muffler insert.
  5. The vehicle muffler according to any of the preceding claims, characterized in that the muffler insert has at least one inner end wall (11, 13, 17, 19) for the formation of a chamber and that a support wall (23) is fastened to the inner end wall (11, 13, 19), at which the tube (31) extending through the circumferential wall (7) is arrested.
  6. The vehicle muffler according to claim 5, characterized in that the support wall (23) is situated between two inner end walls (11, 13, 19) to which it is fastened.
  7. The vehicle muffler according to any of the preceding claims, characterized in that the muffler insert, to which the tube (31) extending through the circumferential wall (7) is fastened, is held solely by the tube (31) in the longitudinal direction (A) of the muffler.
  8. The vehicle muffler according to any of the preceding claims, characterized in that two tubes (31) are provided which protrude through the circumferential wall (7) into the muffler interior and which are fastened at their free end pieces to two neighboring inserts.
  9. A method of manufacturing an exhaust muffler comprising opposite outer end walls (3, 5), an outer circumferential wall (7), at least one muffler insert, at least one inlet tube (31), and at least one outlet tube (21, 39), comprising the following steps:
    a) manufacturing the muffler insert;
    b) manufacturing the closed outer circumferential wall (7) of the exhaust muffler by coiling and closing a sheet metal part;
    c) inserting the muffler insert into the closed circumferential wall (7);
    d) fitting the inlet tube (31) and/or the outlet tube (21, 39) through the circumferential wall (7) into the muffler interior;
    e) fastening the tube (31) extending through the circumferential wall (7) to the muffler insert and to the circumferential wall (7), the tube (31) being fastened to the muffler insert by mechanical deformation.
  10. The method according to claim 9, characterized in that in step e) the tube (31) is mechanically deformed starting from the tube interior, in order to be connected with the muffler insert.
EP06723855.0A 2005-06-08 2006-03-30 Vehicle exhaust muffler and fabrication method Active EP1888891B2 (en)

Applications Claiming Priority (2)

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DE102005026376.3A DE102005026376C5 (en) 2005-06-08 2005-06-08 vehicle exhaust
PCT/EP2006/002888 WO2006131165A1 (en) 2005-06-08 2006-03-30 Vehicle exhaust muffler

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EP1888891A1 EP1888891A1 (en) 2008-02-20
EP1888891B1 EP1888891B1 (en) 2008-08-13
EP1888891B2 true EP1888891B2 (en) 2013-11-13

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US (1) US8051949B2 (en)
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KR (2) KR101045900B1 (en)
CN (1) CN101194089B (en)
DE (2) DE102005026376C5 (en)
ES (1) ES2313633T3 (en)
WO (1) WO2006131165A1 (en)

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DE102021114254A1 (en) 2021-06-02 2022-12-08 Purem GmbH Muffler and method of making a muffler
DE102021115962A1 (en) 2021-06-21 2022-12-22 Purem GmbH Muffler and method of making a muffler
EP4108890A1 (en) 2021-06-21 2022-12-28 Purem GmbH Silencer and method of manufacturing a silencer
EP4112892A1 (en) 2021-06-30 2023-01-04 Purem GmbH Sound absorber
DE102021116802A1 (en) 2021-06-30 2023-01-05 Purem GmbH silencer

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KR20100045529A (en) 2010-05-03
EP1888891A1 (en) 2008-02-20
DE102005026376A1 (en) 2006-12-14
DE102005026376C5 (en) 2019-05-02
WO2006131165A1 (en) 2006-12-14
KR101041542B1 (en) 2011-06-17
CN101194089A (en) 2008-06-04
EP1888891B1 (en) 2008-08-13
US8051949B2 (en) 2011-11-08
DE502006001349D1 (en) 2008-09-25
DE102005026376B4 (en) 2015-10-22
ES2313633T3 (en) 2009-03-01
KR101045900B1 (en) 2011-07-01
CN101194089B (en) 2012-07-04
KR20080017446A (en) 2008-02-26
US20080196969A1 (en) 2008-08-21

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