EP1888891A1 - Vehicle exhaust muffler - Google Patents

Vehicle exhaust muffler

Info

Publication number
EP1888891A1
EP1888891A1 EP06723855A EP06723855A EP1888891A1 EP 1888891 A1 EP1888891 A1 EP 1888891A1 EP 06723855 A EP06723855 A EP 06723855A EP 06723855 A EP06723855 A EP 06723855A EP 1888891 A1 EP1888891 A1 EP 1888891A1
Authority
EP
European Patent Office
Prior art keywords
peripheral wall
insert
tube
extending
vehicle
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.)
Granted
Application number
EP06723855A
Other languages
German (de)
French (fr)
Other versions
EP1888891B1 (en
EP1888891B2 (en
Inventor
Martin Henke
Albert Zahn
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.)
Faurecia Emissions Control Technologies Germany GmbH
Original Assignee
Emcon Technologies Germany Augsburg GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Emcon Technologies Germany Augsburg GmbH filed Critical Emcon Technologies Germany Augsburg GmbH
Publication of EP1888891A1 publication Critical patent/EP1888891A1/en
Publication of EP1888891B1 publication Critical patent/EP1888891B1/en
Application granted granted Critical
Publication of EP1888891B2 publication Critical patent/EP1888891B2/en
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Links

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, with opposite outer end walls, a formed by winding a sheet metal part, closed outer peripheral wall, at least one silencer insert, at least one inlet and at least one outlet pipe.
  • 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.
  • 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.
  • an exhaust silencer of the type mentioned above in that one of the tubes extends through the peripheral wall into the silencer interior and is secured to the peripheral wall and the insert.
  • the tube is thus not exclusively on the peripheral wall with the spaced locations on and stored 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 is preferably carried out by mechanical forming. This type of attachment is less susceptible to corrosion than welding. Further advantages over welding 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).
  • FIG. 1 shows an exploded view of a twin-flow embodiment of the vehicle silencer according to the invention
  • FIG. 1a is a schematic diagram of the peripheral wall of the silencer according to the invention.
  • FIG. 2 shows an enlarged view of the middle region of the silencer according to FIG. 1,
  • FIG. 3 shows a view, partly in section, of a single-flow muffler according to the invention
  • Figure 6 shows schematically a section through the region of the connection of the inlet tube to the insert according to an alternative embodiment.
  • a transverse, double-flow vehicle exhaust silencer hereinafter referred to as vehicle muffler or only muffler, shown.
  • the muffler has an outer housing, which consists of opposite outer end walls 3, 5 and a peripheral wall 7, which is shown simplified in Figure Ia.
  • 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. Silencer inside omitted.
  • 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 about more
  • the retaining wall 23 has, as can be clearly seen in Figure 2, cruciform indentations 29, which increase their stability.
  • An inlet pipe 31 protrudes through an opening in the peripheral wall 7 (see Figure 2) and is welded thereto over the entire pipe 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 Figures 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.
  • a connecting pipe 27 with a 90 ° -Abwinklung.
  • the tube 27 extends through aligned flow openings 15 of the end walls 17, 19th 1, the inlet tube 31 of the right-hand branch opens into a thicker connecting tube 35, which flows 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.
  • tail pipes 41 are inserted outside.
  • 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 wound around a core and, as shown in Figure Ia, 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 these openings 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 for example a type embossing tool or circulating rollers, penetrates into the interior of the corresponding tube 31.
  • the tube 31 is eg on the entire Forming a groove deformed, wherein the edge 33 is formed.
  • Tube 31 and retaining wall 23 are in this way axially and radially positively and non-positively connected and pressed.
  • FIG. 6 schematically shows an alternative to the forming shown in FIGS. 4 and 5.
  • the difference from the embodiment of Figures 4 and 5 is that the tube 31 axially seen before and behind the edge 33 plastically outwardly, ie in the radial direction, is 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 to deform the pipe 31 only in sections, similar to that shown in FIG. 5, 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 corresponds substantially to the embodiment shown in the figures described so far, so that in the following only the differences must be discussed. Functionally identical parts receive the previously introduced reference numerals.
  • 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 optionally be omitted here, which also applies to the rest of the embodiment mentioned above.
  • 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.

Landscapes

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

Abstract

A vehicle exhaust muffler, which is provided with a wound design, has a pipe (31), which extends through the peripheral wall (7), is welded on one side to the peripheral wall (7) and is fastened on the other to a retaining wall (23) of an inner lying insert by means of mechanical shaping.

Description

Fahrzeugschalldämpfer vehicle exhaust
Die Erfindung betrifft einen Fahrzeugschalldämpfer, mit entgegengesetzten äußeren Stirnwänden, einer durch Wickeln eines Blechteils gebildeten, geschlossenen äußeren Umfangswand, wenigstens einem Schalldämpfereinsatz, wenigstens einem Einlaß- und wenigstens einem Auslaßrohr.The invention relates to a vehicle silencer, with opposite outer end walls, a formed by winding a sheet metal part, closed outer peripheral wall, at least one silencer insert, at least one inlet and at least one outlet pipe.
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.The invention relates to a vehicle silencer in wound construction.
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.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.
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 dadurch erreicht, daß sich eines der Rohre durch die Umfangswand ins Schalldämpferinnere erstreckt und an der Umfangswand und dem Einsatz befestigt ist. Das Rohr ist damit nicht ausschließlich über die Umfangswand mit dem 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 in an exhaust silencer of the type mentioned above in that one of the tubes extends through the peripheral wall into the silencer interior and is secured to the peripheral wall and the insert. The tube is thus not exclusively on the peripheral wall with the spaced locations on and stored 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.
Die Befestigung des Rohres am Einsatz erfolgt vorzugsweise durch mechanisches Umformen. Diese Befestigungsart ist weniger korrosionsanfällig als Schweißen. Weitere Vorteile gegenüber Schweiße sind der geringere Verzug der Bauteile und die höhere Festigkeit.The attachment of the tube to the insert is preferably carried out by mechanical forming. This type of attachment is less susceptible to corrosion than welding. Further advantages over welding 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 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 to attach the two projecting into the interior tubes at their free end pieces on two adjacent inserts.
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: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:
- Figur 1 eine Explosionsansicht einer zweiflutigen Ausfuhrungsform des erfindungsgemäßen Fahrzeugschalldämpfers,FIG. 1 shows an exploded view of a twin-flow embodiment of the vehicle silencer according to the invention,
- Figur Ia eine Prinzipskizze der Umfangswand des erfindungsgemäßen Schalldämpfers,FIG. 1a is a schematic diagram of the peripheral wall of the silencer according to the invention,
- Figur 2 eine vergrößerte Ansicht des mittleren Bereichs des Schalldämpfers nach Figur 1 ,FIG. 2 shows an enlarged view of the middle region of the silencer according to FIG. 1,
- Figur 3 eine Ansicht, teilweise im Schnitt, eines einflutigen Schalldämpfers nach der Erfindung,FIG. 3 shows a view, partly in section, of a single-flow muffler according to the invention,
- Figuren 4 und 5 Schnittansichten durch den Bereich der Anbindung des- Figures 4 and 5 are sectional views through the region of the connection of the
Einlaßrohres an den Einsatz gemäß zwei verschiedener Ausführungsformen; undInlet tube to the insert according to two different embodiments; and
- Figur 6 schematisch einen Schnitt durch den Bereich der Anbindung des Einlaßrohres an den Einsatz gemäß einer alternativen Ausführungsform.Figure 6 shows 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 Ia 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. 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 Figure 1, a transverse, double-flow vehicle exhaust silencer, hereinafter referred to as vehicle muffler or only muffler, shown. The muffler has an outer housing, which consists of opposite outer end walls 3, 5 and a peripheral wall 7, which is shown simplified in Figure Ia. 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. Silencer inside omitted. 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 weitereAs can be seen in Figure 2, the end wall 19 is about more
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 Schalldämpferinsatz, welcher vom Blechteil umgeben wird.Connecting pipes 25, 27 of different cross-section with the end walls 3 and 17 are connected. 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 can be clearly seen in Figure 2, cruciform indentations 29, which increase their stability. An inlet pipe 31 protrudes through an opening in the peripheral wall 7 (see Figure 2) and is welded thereto over the entire pipe 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 Figures 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 EinlaßrohrIn Figures 1 and 2 it can be seen that in the left half of the inlet pipe
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. erkennen ist, mündet das Einlaßrohx 31 des rechten Stranges in ein dickeres Verbindungsrohr 35, welches in eine mittlere Kammer 37 rührt. 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.31 shortly after passing through the retaining wall 23 ends. 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 1, the inlet tube 31 of the right-hand branch opens into a thicker connecting tube 35, which flows 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 tubes 21, 39 so-called tail pipes 41 are inserted outside. 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 erfmdungsgemäßen 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 Ia 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 is 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 wound around a core and, as shown in Figure Ia, 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 diese Öffnungen hindurchgesteckt, bis sie auch durch die entsprechenden Öffnungen in den Haltewänden 23 ragen.The inlet pipes 31 are inserted through these openings 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 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 purpose, a tool, for example a type embossing tool or circulating rollers, penetrates into the interior of the corresponding tube 31. The tube 31 is eg on the entire Forming a groove deformed, wherein the edge 33 is formed. Tube 31 and retaining wall 23 are in this way axially and radially positively and non-positively connected and pressed.
Die zwischen den beiden verformten Abschnitten bildende Nut trägt dasThe groove forming between the two deformed sections carries this
Bezugszeichen 51. In Figur 4 ist auch der wulstartige Fortsatz 53, der sich in der Haltewand 23 gebildet hat, gut zu erkennen.Reference numeral 51. In Figure 4, the bead-like projection 53, which has formed in the retaining wall 23, can be clearly seen.
Anstatt einer geschlossen umlaufenden Nut 51 können Rohr 31 und HaltewandInstead of a closed circumferential groove 51 tube 31 and retaining wall
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 Wülsten23 are also pressed together in segments, as shown in Figure 5. Here, the tube 31 has been pushed outwardly only at a few portions 55 circumferentially spaced apart to form beads
53 im Rand 33.53 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.FIG. 6 schematically shows an alternative to the forming shown in FIGS. 4 and 5. The difference from the embodiment of Figures 4 and 5 is that the tube 31 axially seen before and behind the edge 33 plastically outwardly, ie in the radial direction, is 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 to deform the pipe 31 only in sections, similar to that shown in FIG. 5, 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 Ausführungsform 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. 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.The embodiment of Figure 3 corresponds substantially to the embodiment shown in the figures described so far, so that in the following only the differences must be discussed. Functionally identical parts receive the previously introduced reference numerals. Provided 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 optionally be omitted here, which also applies to the rest of the embodiment mentioned above. 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

r cuouiaua μi UOIJLC r cuouiaua μi UOIJLC
1. Fahrzeugschalldämpfer, mit entgegengesetzten äußeren Stirnwänden (3, 5), einer durch Wickeln eines Blechteils gebildeten, geschlossenen äußeren Umfangswand (7), wenigstens einem Schalldämpfereinsatz, wenigstens einem Einlaßrohr (31) und wenigstens einem Auslaßrohr (21, 39), dadurch gekennzeichnet, daß sich eines der Rohre (31) durch die Umfangswand (7) ins Schalldämpferinnere erstreckt und an der Umfangswand (7) und am Einsatz befestigt ist.1. A vehicle muffler, with opposite outer end walls (3, 5), formed by winding a sheet metal part, closed outer peripheral wall (7), at least one muffler insert, at least one inlet pipe (31) and at least one outlet pipe (21, 39), characterized in that one of the tubes (31) extends through the peripheral wall (7) into the silencer interior and is fastened to the peripheral wall (7) and to the insert.
2. Fahrzeugschalldämpfer nach Anspruch 1, dadurch gekennzeichnet, daß das sich durch die Umfangswand (7) hindurch erstreckende Rohr (31) durch mechanisches Umformen an dem Einsatz befestigt ist.2. A vehicle silencer according to claim 1, characterized in that the through the peripheral wall (7) extending therethrough tube (31) is fixed by mechanical deformation of the insert.
3. Fahrzeugschalldämpfer nach Anspruch 2, dadurch gekennzeichnet, daß das sich durch die Umfangswand (7) erstreckende Rohr (31) und der Einsatz miteinander verpreßt sind.3. A vehicle silencer according to claim 2, characterized in that extending through the peripheral wall (7) extending tube (31) and the insert are pressed together.
4. Fahrzeugschalldämpfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das sich durch die Umfangswand (7) erstreckende Rohr (31) auf einem gesamten Rohrumfang mit dem Einsatz verbunden ist.4. Vehicle silencer according to one of the preceding claims, characterized in that extending through the peripheral wall (7) extending tube (31) is connected to the insert over an entire pipe circumference.
5. Fahrzeugschalldämpfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das sich durch die Umfangswand (7) erstreckende Rohr (31) vom Rohrinneren aus mechanisch umgeformt ist, um mit dem Einsatz verbunden zu werden.5. A vehicle silencer according to one of the preceding claims, characterized in that extending through the peripheral wall (7) extending tube (31) from the inside of the tube is mechanically transformed to be connected to the insert.
6. Fahrzeugschalldämpfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Einsatz wenigstens eine innere Stirnwand (H5 13, 19) eine Haltewand (23) befestigt ist, an der das sich durch die Umfangswand (7) erstreckende Rohr (31) arretiert ist.6. Vehicle silencer according to one of the preceding claims, characterized in that the insert at least one inner end wall (H 5 13, 19) a retaining wall (23) is fixed, on which the through the peripheral wall (7) extending tube (31) is locked.
7. Fahrzeugschalldämpfer nach Anspruch 6, dadurch gekennzeichnet, daß die Haltewand (23) zwischen zwei inneren Stirnwänden (11, 13, 19) liegt, an denen sie befestigt ist.7. A vehicle muffler according to claim 6, characterized in that the retaining wall (23) between two inner end walls (11, 13, 19), to which it is attached.
8. Fahrzeugschalldämpfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Einsatz, an dem das sich durch die Umfangswand (7) erstreckende Rohr (3) befestigt ist, in Längsrichtung (A) des Schalldämpfers nur durch das Rohr (31) gehalten ist.8. A vehicle silencer according to one of the preceding claims, characterized in that the insert, on which by the peripheral wall (7) extending tube (3) is fixed, in the longitudinal direction (A) of the muffler is held only by the tube (31) ,
9. Fahrzeugschalldämpfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwei durch die Umfangswand (7) in das Schall- dämpferinnere hineinragende Rohre (31) vorgesehen sind, die an ihren freien Endstücken an zwei nebeneinanderliegenden Einsätzen befestigt sind. 9. A vehicle silencer according to one of the preceding claims, characterized in that two through the peripheral wall (7) in the silencer inside projecting tubes (31) are provided, which are fastened at their free end pieces on two adjacent inserts.
EP06723855.0A 2005-06-08 2006-03-30 Vehicle exhaust muffler and fabrication method Active EP1888891B2 (en)

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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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US20080196969A1 (en) 2008-08-21
KR101041542B1 (en) 2011-06-17
KR20100045529A (en) 2010-05-03
US8051949B2 (en) 2011-11-08
ES2313633T3 (en) 2009-03-01
EP1888891B2 (en) 2013-11-13
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DE102005026376B4 (en) 2015-10-22
DE102005026376C5 (en) 2019-05-02
KR101045900B1 (en) 2011-07-01
WO2006131165A1 (en) 2006-12-14
DE102005026376A1 (en) 2006-12-14
CN101194089B (en) 2012-07-04
DE502006001349D1 (en) 2008-09-25

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