EP2463492B1 - Housing of silencer - Google Patents

Housing of silencer Download PDF

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Publication number
EP2463492B1
EP2463492B1 EP11189883.9A EP11189883A EP2463492B1 EP 2463492 B1 EP2463492 B1 EP 2463492B1 EP 11189883 A EP11189883 A EP 11189883A EP 2463492 B1 EP2463492 B1 EP 2463492B1
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EP
European Patent Office
Prior art keywords
support
shell
lever
silencer housing
housing according
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.)
Active
Application number
EP11189883.9A
Other languages
German (de)
French (fr)
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EP2463492A1 (en
Inventor
Arnulf Spieth
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.)
Eberspaecher Exhaust Technology GmbH and Co KG
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Eberspaecher Exhaust Technology GmbH and Co KG
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Publication of EP2463492A1 publication Critical patent/EP2463492A1/en
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Publication of EP2463492B1 publication Critical patent/EP2463492B1/en
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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
    • 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
    • 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
    • F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/10—Tubes having non-circular cross section

Definitions

  • the present invention relates to a muffler housing, as it can be found, for example, in a component of an exhaust system of an internal combustion engine, in particular of a motor vehicle, according to the preamble of claim 1.
  • Such a muffler housing may be cylindrical and usually comprises a jacket which encloses a housing interior in the circumferential direction. Basically, two end floors may be provided which close the housing interior axially and are firmly connected to the jacket.
  • the muffler housing may be implemented in a winding construction, in which a one-piece jacket is wound in the circumferential direction and the butt ends are fastened to each other.
  • the muffler housing can be manufactured in a half-shell construction, in which two half-shells enclose the two end floors and the housing interior in the circumferential direction in each case by about 180 ° and which are fastened together in the region of their ends in a parting plane.
  • a half-shell construction is conceivable in which the half-shells also axially limit the housing interior, so that no end floors are present.
  • a pipe construction is possible in which a tubular body is used as a jacket.
  • the silencer housing can be excited to vibrations and vibrations, for example, a vibration excitation by the road or by the engine or by gas pulsations in the exhaust system can take place. It has been shown that natural vibrations are generated in particular in the region of the shell can lead to an unwanted noise emission. In addition, it is being attempted in the field of vehicles to save weight in order to reduce the energy consumption of the vehicles. In muffler housings, in particular components of exhaust systems, this leads to the fact that reduced wall thicknesses are selected for the sheets used. This shows that reduced wall thicknesses, in particular in the region of the jacket, increase the tendency to self-oscillations of the jacket.
  • Silencer housing with a jacket which encloses a housing interior in the circumferential direction for example, from DE 37 04 006 A1 , of the DE 198 49 118 A1 , of the WO 2004/027231 A1 and the WO 98/53187 A1 known.
  • the present invention is concerned with the problem of providing a muffler housing of the type mentioned an improved embodiment, which is characterized in particular by the fact that even with low wall thickness, a tendency to self-oscillations in the region of the shell is reduced.
  • the invention is based on the general idea to equip the muffler housing with at least one biasing device, which is located in the housing interior, that is disposed within the shell and at least a support region of the shell initiates an outwardly oriented bias or support force in the jacket.
  • this biased support of the shell its natural vibration behavior changes significantly, so that the tendency to undesirable Natural vibration can be significantly reduced. This makes it possible to reduce the wall thickness of the sheet used for the production of the shell, without causing an undesirably high acoustic emission.
  • the respective biasing device is designed so that it is supported on a first support portion of the shell inside the jacket and receives an inwardly oriented first support force and is supported on a spaced from the first support portion second support portion of the shell inside the jacket and an outward oriented second support force in the jacket initiates.
  • This second support force can be greater than the first support force.
  • the biasing forces are equal.
  • the respective biasing device is supported on the shell in two spaced-apart support areas with a first bias and a second bias from. These biases may vary in size, preferably with the first biasing force being less than the second biasing force.
  • the pretensioning device receives a first force or pretension in the first support region and transmits this in the form of a second force or pretension to the second support region.
  • the invention utilizes the knowledge that, in the case of a muffler housing with an intermediate bottom arranged in the housing interior, the mantle experiences inhomogeneous radial support in the circumferential direction as soon as the muffler housing has a round cross section in longitudinal section, which deviates from a circular circular cross section and is oval or elliptical, for example .
  • the bias voltages in particular the bias voltages of different sizes, can be selected and positioned in such a way as to stiffen the jacket so that targeted areas of the jacket that are susceptible to vibration are supported.
  • the muffler housing is cylindrical and has two end floors, which close the housing interior axially and are firmly connected to the jacket. The pretensioner is then conveniently placed between the end shelves.
  • the muffler housing has two half shells, which bound the housing interior in the circumferential direction and axially.
  • the two support portions may be spaced apart in the circumferential direction.
  • the two support areas can lie in particular in the same axial plane of the shell.
  • the two support portions may be spaced apart in the axial direction. This makes it possible to support particularly vulnerable areas of the jacket.
  • the housing interior may have a round, flattened cross-section transverse to the axial direction, so that a radius of curvature of the jacket varies in the circumferential direction.
  • the cross section is elliptical or oval.
  • the two support areas can now be arranged in the peripheral regions with different radii of curvature. This embodiment is based on the recognition that the radius of curvature has an effect on the rigidity of the respective cladding region and thus an effect on the tendency of the respective cladding region to vibrate. In particular, areas with a smaller radius of curvature are less susceptible to vibration than areas with a larger radius of curvature.
  • the second support region which in particular generates the larger second bias voltage, can now be arranged in a peripheral region which has a smaller radius of curvature than a peripheral region in which the first support region which generates the smaller first bias voltage is arranged.
  • the two support areas in the circumferential direction by at least 30 ° and at most 90 ° and preferably about 45 ° apart from each other.
  • the respective biasing means may be disposed on an end floor or on an intermediate floor. It is also possible to arrange a preload structure in the housing interior which has the respective pretensioning device. Such an end floor forms an axial boundary of the housing interior. In contrast, such an intermediate floor is disposed within the housing interior, in particular axially between the two end floors, if the muffler housing has two end floors.
  • the respective biasing means comprises at least one lever which has two spaced support contours, which are supported in each case in one of the support areas on the inside of the jacket is particularly advantageous.
  • the respective lever is pivotally arranged so that it has a spatially fixed axis of rotation, which can be positioned between the two support contours relative to the lever in particular so that arise for the support contours different sized lever arms. Since the torques have to cancel the lever, the different sized lever arms in the two support contours produce the desired different sized biases.
  • the said lever thus comprises a first lever arm which is assigned to the first support contour and thus to the first support region and a second lever arm which is assigned to the second support contour and thus to the second support region, wherein the first lever arm can be larger than the second lever arm, in particular so that the first bias voltage is smaller than the second bias voltage, when the lever does not move in the mounted state and thus there is a moment equilibrium.
  • the respective lever can be arranged pivotably about an axis of rotation on an end floor or on an intermediate floor or on a pretensioning structure arranged in the housing interior.
  • the respective lever on the respective bottom or on the biasing structure can be mounted rotatably adjustable about the axis of rotation or arranged to be rollable about the axis of rotation.
  • At least one of the support contours of the respective lever may be formed on a support body which is movably disposed on the respective lever.
  • the same support body can be biased by a plurality of levers against the jacket, whereby larger supporting forces can be realized.
  • the support body may have a convex outer contour facing the shell, which is shaped to be complementary to the concave inner contour of the respective support region of the shell. This results in a secure Support between the support body and the jacket, which avoids in particular relative movements between the support body and the jacket.
  • the jacket can be configured in winding construction or pipe construction or in half-shell construction.
  • the second support region can be arranged proximal to a parting plane in which the two half-shells are fastened to one another, while then the first support region is arranged distally to the parting plane.
  • This design is based on the consideration that the shell halves in the region of the parting plane have a higher stiffener than spaced from the parting plane, so that the stiffening acts particularly effective distal to the parting plane.
  • the silencer housing is preferably the housing of a silencer of an exhaust system of an internal combustion engine, in particular of a motor vehicle.
  • a cylindrical muffler housing 1 comprises a jacket 2 and two end floors 3, 4.
  • the muffler housing 1 is the housing 1 of a muffler 5 a in Fig. 1 only in the region of the muffler 5 shown exhaust system 6, which can be used in an internal combustion engine, in particular a motor vehicle, for the discharge of exhaust gases.
  • the jacket 2 surrounds a housing interior 7 in a direction indicated by a double arrow circumferential direction 8.
  • the end floors 3, 4 close the housing interior 7 in a in Fig. 1
  • the end bottoms 3, 4 form the axial end faces or ends of the muffler housing 1.
  • the end floors 3, 4 are fixedly connected to the jacket 2.
  • the jacket 2 may also be shaped so that it assumes the function of the end floors 4, 5, namely the axial boundary of the housing interior 7.
  • the shell 2 is realized in half-shell construction, so that it comprises two half-shells 10, 11, which lie against one another in a parting plane 12 or are fastened to one another.
  • the two half-shells 10, 11 may have transverse to the longitudinal direction 9 projecting collar 13, via which the half-shells 10, 11 abut each other in the parting plane 12 and over which the half-shells 10, 11 may be attached to each other.
  • the in Fig. 1 shown longitudinal section of the muffler housing 1 is guided through the parting plane 12, so that only one of the half-shells 10, 11 is visible.
  • the half-shells 10, 11 may be formed so as to integrally include the two end floors 4, 5 so that separate end floors can be dispensed with.
  • the jacket 2 can also be configured in a winding construction or in a tubular construction.
  • the following explanations apply not only to the half-shell construction shown, but also analogous to the pipe construction or for the winding construction or for any other suitable construction for the muffler housing 1 and the jacket. 2
  • the muffler housing 1 also has at least one biasing device 14, which is arranged axially between the end floors 3, 4 in the housing interior 7.
  • at least one biasing device 14 is arranged axially between the end floors 3, 4 in the housing interior 7.
  • two such pretensioners 14 are shown.
  • only a single biasing device 14 is shown.
  • the respective biasing device 14 is supported on a first support portion 15 of the shell 2 inside the jacket 2 under an outwardly oriented, indicated by an arrow first bias 16 from. Furthermore, the biasing device 14 is supported on a second support portion 17 of the shell 2 inside on the jacket 2 under an outwardly oriented, also indicated by an arrow second bias 18 from. In this case, the second bias voltage 18 is preferably greater than the first bias voltage 16.
  • the two support portions 15, 17 are spaced from each other on the jacket 2 is positioned. Suitably, the two support portions 15, 17 are spaced apart in the circumferential direction 8. You can basically lie in the same axial plane of the shell 2.
  • the two support portions 15, 17 may be arranged spaced apart in the axial direction 9. They may lie in the same peripheral portion, so be aligned axially aligned with each other. In principle, however, they can also be spaced apart in the circumferential direction 8.
  • the muffler housing 1 or its housing interior 7 has a transversely to the axial direction 9 has a round, but not circular, but flattened cross section, which may be particularly oval or elliptical.
  • a radius of curvature 19 of the jacket 2 in the circumferential direction 8 can vary.
  • the two support regions 15, 17 are then expediently in peripheral regions 20, 21, which have different radii of curvature 19.
  • the first support region 15 is arranged in a first circumferential region 20, which has a larger radius of curvature 19 than a second peripheral region 21, in which the second support region 17 is arranged.
  • the second support area 17 associated with the larger second pretension 18 is located in the second peripheral area 21 with a smaller radius of curvature 19.
  • the two support portions 15, 17 in the circumferential direction 8 spaced by at least 30 ° and at most 90 ° apart.
  • the two support areas 15, 17 are each spaced apart in the circumferential direction by approximately 45 °.
  • the first support portion 15 is disposed distal to the parting plane 12, while the second support portion 21 is disposed proximal to the parting plane 12.
  • the biasing device 14 shown on the left is arranged on one of the end floors 3, 4.
  • the in Fig. 1 Right biasing means 14 shown arranged on an intermediate bottom 22, which is arranged axially between the two end floors 3, 4.
  • said intermediate bottom 22 may have at least one passage opening 35 and / or at least one perforation 36.
  • the respective biasing means 14 at least one lever 24 shown here only in simplified form, the two spaced support contours, namely a first support contour 25 and a second support structure 26 which are spaced from each other on the respective lever 24.
  • the two support structures 25, 26 are located at the mutually remote ends of the respective lever 24.
  • the first support contour 25 is supported in the first support region 15 on the inside of the casing 2.
  • the second support contour 26 is supported in the second support region 17 inside the jacket 2.
  • the Lever 24 is associated with an axis of rotation 27 about which the lever 24 is movable.
  • the axis of rotation 27 is largely fixed in position within the muffler housing 1 or spatially fixed.
  • the axis of rotation 27 is arranged on the lever 24 between the support contours 25, 26, and that asymmetrically, so that form two different sized lever arms on the lever 24 for the two support contours 25, 26, namely a first lever arm 28 of the rotation axis 27 for first support contour 25 leads, and a second lever arm 29 which leads from the axis of rotation 27 to the second support contour 26.
  • the first lever arm 28 is greater than the second lever arm 29. Since the lever 27 immobile rests in the assembled state of the muffler housing 1, the torque acting on the lever 24 are equal or in equilibrium. As a result, the second preload 18 introduced at the shorter second lever arm 29 into the second support region 17 is greater than the first preload 16 introduced via the larger first lever arm 28 into the first support region 15.
  • the said lever arms 28, 29 are to be understood in terms of their effective Hebelarmin, ie in terms of their physical or mathematical Hebelarmin.
  • the respective lever 24 on one of the end shelves 3, 4 or on such an intermediate floor 22 can be pivotably arranged about the axis of rotation 27, so that it is rotatably mounted on the respective floor 3, 4, 22 about the axis of rotation 27.
  • a corresponding pivot bearing 30 is shown in simplified form in the figures. In this embodiment, the spatial position of the rotation axis 27 is fixed.
  • the pivotability of the lever 24 about the rotation axis 27 according to Fig. 4 also be realized in that the respective lever 24 in the region of the axis of rotation 27 is arranged rollable on the respective bottom 3, 4, 22.
  • Fig. 4 is a suitable rolling contour 31 shown simplified.
  • the spatial position of the axis of rotation 27 can change slightly by the rolling movement, so that it is only substantially fixed in this case.
  • the pretensioning device 14 has a pretensioning structure 23, which is located axially between the end floors 3, 4.
  • a pretensioning structure 23 comprises this biasing structure 23 a plurality of levers 24, namely purely exemplary and without limiting the generality of exactly four such lever 24, which are arranged distributed in the circumferential direction 8.
  • Each lever 24 is supported on a first support region 15 and on a second support region 17 from the inside of the casing 2. Accordingly, four first support regions 15 and four second support regions 17 are distributed in the circumferential direction 8 on the casing 2.
  • the support structure 23 may have a comparatively stiff support 32, on which the individual levers 24 are arranged, wherein the pivotability of the respective lever 24 about the associated axis of rotation 27 may be realized by the elasticity of the support 32 or by corresponding bearing points.
  • the respective biasing means 14 comprises a support body 33, on which one of the support contours 15, 17, here the first support contour 15 is formed.
  • This support body 33 is movably arranged on at least one such lever 24.
  • the movable coupling between the support body 33 and the respective lever 24 each have a slot 34 which allows a relative movement between the support body 33 and associated lever 24.
  • the same support body 33 at the same time over a plurality of levers 24, namely, for example. Via two levers 24 biased against the jacket 2.
  • the respective owns Support body 33 expediently a coat 2 facing convex outer contour which is complementary to the concave inner contour of the respective support portion 15, 17, here of the first support portion 15 of the shell 2 is formed. This results in a large-area and stable support for the support body 33 on the shell. 2
  • both Fig. 1 to 5 and 8th the levers 24 are each mounted on a suitable position of the respective bottom 3, 4, 22 axially to the respective bottom 3, 4, 22.
  • the assembly of the muffler housing 1 is based on the Fig. 8a and 8b explained in more detail:

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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)
  • Vibration Prevention Devices (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Description

Die vorliegende Erfindung betrifft ein Schalldämpfergehäuse, wie es bspw. bei einer Komponente einer Abgasanlage einer Brennkraftmaschine, insbesondere eines Kraftfahrzeugs, Verwendung finden kann, gemäß dem Oberbegriff des Anspruchs 1.The present invention relates to a muffler housing, as it can be found, for example, in a component of an exhaust system of an internal combustion engine, in particular of a motor vehicle, according to the preamble of claim 1.

Ein derartiges Schalldämpfergehäuse kann zylindrisch ausgestaltet sein und umfasst üblicherweise einen Mantel, der einen Gehäuseinnenraum in Umfangsrichtung umschließt. Grundsätzlich können zwei Endböden vorgesehen sein, die den Gehäuseinnenraum axial verschließen und die fest mit dem Mantel verbunden sind. Dabei kann das Schalldämpfergehäuse in Wickelbauweise ausgeführt sein, bei der ein einteiliger Mantel in der Umfangsrichtung gewickelt ist und dessen Stoßenden aneinander befestigt sind. Alternativ kann das Schalldämpfergehäuse in Halbschalenbauweise gefertigt sein, bei der zwei Halbschalen die beiden Endböden und den Gehäuseinnenraum in der Umfangsrichtung jeweils um etwa 180° umschließen und die im Bereich ihrer Enden in einer Trennebene aneinander befestigt sind. Auch ist eine Halbschalenbauweise denkbar, bei welcher die Halbschalen den Gehäuseinnenraum auch axial begrenzen, so dass keine Endböden vorhanden sind. Ebenso ist eine Rohrbauweise möglich, bei der ein Rohrkörper als Mantel verwendet wird.Such a muffler housing may be cylindrical and usually comprises a jacket which encloses a housing interior in the circumferential direction. Basically, two end floors may be provided which close the housing interior axially and are firmly connected to the jacket. In this case, the muffler housing may be implemented in a winding construction, in which a one-piece jacket is wound in the circumferential direction and the butt ends are fastened to each other. Alternatively, the muffler housing can be manufactured in a half-shell construction, in which two half-shells enclose the two end floors and the housing interior in the circumferential direction in each case by about 180 ° and which are fastened together in the region of their ends in a parting plane. Also, a half-shell construction is conceivable in which the half-shells also axially limit the housing interior, so that no end floors are present. Likewise, a pipe construction is possible in which a tubular body is used as a jacket.

Insbesondere bei Fahrzeuganwendungen kann das Schalldämpfergehäuse zu Schwingungen und Vibrationen angeregt werden, beispielsweise kann eine Schwingungsanregung durch die Fahrbahn oder durch den Motor oder durch Gaspulsationen in der Abgasanlage erfolgen. Es hat sich gezeigt, dass insbesondere im Bereich des Mantels Eigenschwingungen generiert werden können, die zu einer unerwünschten Schallemission führen. Hinzu kommt, dass gerade im Fahrzeugbereich versucht wird, Gewicht einzusparen, um den Energieverbrauch der Fahrzeuge zu reduzieren. Bei Schalldämpfergehäusen, insbesondere von Komponenten von Abgasanlagen, führt dies dazu, dass für die verwendeten Bleche reduzierte Wandstärken ausgewählt werden. Hierbei zeigt sich, dass reduzierte Wandstärken insbesondere im Bereich des Mantels die Tendenz zu Eigenschwingungen des Mantels erhöhen.In particular, in vehicle applications, the silencer housing can be excited to vibrations and vibrations, for example, a vibration excitation by the road or by the engine or by gas pulsations in the exhaust system can take place. It has been shown that natural vibrations are generated in particular in the region of the shell can lead to an unwanted noise emission. In addition, it is being attempted in the field of vehicles to save weight in order to reduce the energy consumption of the vehicles. In muffler housings, in particular components of exhaust systems, this leads to the fact that reduced wall thicknesses are selected for the sheets used. This shows that reduced wall thicknesses, in particular in the region of the jacket, increase the tendency to self-oscillations of the jacket.

Schalldämpfergehäuse mit einem Mantel, der einen Gehäuseinnenraum in Umfangsrichtung umschließt, sind beispielsweise aus der DE 37 04 006 A1 , der DE 198 49 118 A1 , der WO 2004/027231 A1 und der WO 98/53187 A1 bekannt.Silencer housing with a jacket which encloses a housing interior in the circumferential direction, for example, from DE 37 04 006 A1 , of the DE 198 49 118 A1 , of the WO 2004/027231 A1 and the WO 98/53187 A1 known.

Die vorliegende Erfindung beschäftigt sich mit dem Problem, für ein Schalldämpfergehäuse der eingangs genannten Art eine verbesserte Ausführungsform anzugeben, die sich insbesondere dadurch auszeichnet, dass auch bei geringer Wandstärke eine Neigung zu Eigenschwingungen im Bereich des Mantels reduziert ist.The present invention is concerned with the problem of providing a muffler housing of the type mentioned an improved embodiment, which is characterized in particular by the fact that even with low wall thickness, a tendency to self-oscillations in the region of the shell is reduced.

Dieses Problem wird erfindungsgemäß durch den Gegenstand des unabhängigen Anspruchs gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.This problem is solved according to the invention by the subject matter of the independent claim. Advantageous embodiments are the subject of the dependent claims.

Die Erfindung beruht auf dem allgemeinen Gedanken, das Schalldämpfergehäuse mit wenigstens einer Vorspanneinrichtung auszustatten, die sich im Gehäuseinnenraum befindet, also innerhalb des Mantels angeordnet ist und die an wenigsten einem Stützbereich des Mantels eine nach außen orientierte Vorspannung oder Stützkraft in den Mantel einleitet. Durch diese vorgespannte Abstützung des Mantels verändert sich sein Eigenschwingverhalten signifikant, so dass die Tendenz zu unerwünschten Eigenschwingungen erheblich reduziert werden kann. Hierdurch ist es möglich, die Wandstärke des für die Herstellung des Mantels verwendeten Blechs zu reduzieren, ohne dass dabei eine unerwünscht hohe Schallemission entsteht.The invention is based on the general idea to equip the muffler housing with at least one biasing device, which is located in the housing interior, that is disposed within the shell and at least a support region of the shell initiates an outwardly oriented bias or support force in the jacket. By this biased support of the shell, its natural vibration behavior changes significantly, so that the tendency to undesirable Natural vibration can be significantly reduced. This makes it possible to reduce the wall thickness of the sheet used for the production of the shell, without causing an undesirably high acoustic emission.

Zweckmäßig ist die jeweilige Vorspanneinrichtung dabei so konzipiert, dass sie an einem ersten Stützbereich des Mantels innen am Mantel abgestützt ist und eine nach innen orientierte erste Stützkraft aufnimmt und sich an einem vom ersten Stützbereich beabstandeten zweiten Stützbereich des Mantels innen am Mantel abstützt und eine nach außen orientierte zweite Stützkraft in den Mantel einleitet. Diese zweite Stützkraft kann dabei größer sein als die erste Stützkraft. Grundsätzlich ist auch eine Bauform denkbar, bei welcher die Vorspannkräfte gleich groß sind. Mit anderen Worten, die jeweilige Vorspanneinrichtung stützt sich am Mantel in zwei voneinander beabstandeten Stützbereichen mit einer ersten Vorspannung und mit einer zweiten Vorspannung ab. Diese Vorspannungen können unterschiedlich groß sein, wobei vorzugsweise die erste Vorspannkraft kleiner ist als die zweite Vorspannkraft. Die Vorspanneinrichtung nimmt im ersten Stützbereich eine erste Kraft oder Vorspannung auf und überträgt diese in Form einer zweiten Kraft oder Vorspannung an den zweiten Stützbereich.Suitably, the respective biasing device is designed so that it is supported on a first support portion of the shell inside the jacket and receives an inwardly oriented first support force and is supported on a spaced from the first support portion second support portion of the shell inside the jacket and an outward oriented second support force in the jacket initiates. This second support force can be greater than the first support force. In principle, a design is conceivable in which the biasing forces are equal. In other words, the respective biasing device is supported on the shell in two spaced-apart support areas with a first bias and a second bias from. These biases may vary in size, preferably with the first biasing force being less than the second biasing force. The pretensioning device receives a first force or pretension in the first support region and transmits this in the form of a second force or pretension to the second support region.

Die Erfindung nutzt hierbei die Erkenntnis, dass bei einem Schalldämpfergehäuse mit einem im Gehäuseinnenraum angeordneten Zwischenboden der Mantel in der Umfangsrichtung eine inhomogene radiale Abstützung erfährt, sobald das Schalldämpfergehäuse im Längsschnitt einen runden Querschnitt aufweist, der von einem kreisrunden Kreisquerschnitt abweicht und z.B. oval oder elliptisch ist. Die Vorspannungen, insbesondere die unterschiedlich großen Vorspannungen, können so zur Aussteifung des Mantels gewählt und positioniert werden, dass gezielt schwingungsgefährdete Bereiche des Mantels abgestützt werden.In this case, the invention utilizes the knowledge that, in the case of a muffler housing with an intermediate bottom arranged in the housing interior, the mantle experiences inhomogeneous radial support in the circumferential direction as soon as the muffler housing has a round cross section in longitudinal section, which deviates from a circular circular cross section and is oval or elliptical, for example , The bias voltages, in particular the bias voltages of different sizes, can be selected and positioned in such a way as to stiffen the jacket so that targeted areas of the jacket that are susceptible to vibration are supported.

Bei einer vorteilhaften Ausführungsform kann vorgesehen sein, dass das Schalldämpfergehäuse zylindrisch ausgestaltet ist und zwei Endböden aufweist, die den Gehäuseinnenraum axial verschließen und fest mit dem Mantel verbunden sind. Die Vorspanneinrichtung ist dann zweckmäßig zwischen den Endböden angeordnet. Alternativ kann vorgesehen sein, dass das Schalldämpfergehäuse zwei Halbschalen aufweist, die den Gehäuseinnenraum in Umfangsrichtung und axial begrenzen.In an advantageous embodiment it can be provided that the muffler housing is cylindrical and has two end floors, which close the housing interior axially and are firmly connected to the jacket. The pretensioner is then conveniently placed between the end shelves. Alternatively it can be provided that the muffler housing has two half shells, which bound the housing interior in the circumferential direction and axially.

Entsprechend einer anderen vorteilhaften Ausführungsform können die beiden Stützbereiche in der Umfangsrichtung voneinander beabstandet sein. Dabei können die beiden Stützbereiche insbesondere in derselben Axialebene des Mantels liegen. Alternativ können die beiden Stützbereiche in der Axialrichtung voneinander beabstandet sein. Hierdurch ist es möglich, besonders schwingungsgefährdete Bereiche des Mantels abzustützen.According to another advantageous embodiment, the two support portions may be spaced apart in the circumferential direction. In this case, the two support areas can lie in particular in the same axial plane of the shell. Alternatively, the two support portions may be spaced apart in the axial direction. This makes it possible to support particularly vulnerable areas of the jacket.

Entsprechend einer vorteilhaften Ausführungsform kann der Gehäuseinnenraum quer zur Axialrichtung einen runden, abgeflachten Querschnitt aufweisen, so dass ein Krümmungsradius des Mantels in der Umfangsrichtung variiert. Beispielsweise ist der Querschnitt elliptisch oder oval. Zweckmäßig können nun die beiden Stützbereiche in Umfangsbereichen mit verschiedenen Krümmungsradien angeordnet sein. Diese Ausführungsform beruht auf der Erkenntnis, dass der Krümmungsradius eine Auswirkung auf die Steifigkeit des jeweiligen Mantelbereichs und somit eine Auswirkung auf die Schwingungsneigung des jeweiligen Mantelbereichs hat. Insbesondere sind Bereiche mit kleinerem Krümmungsradius weniger schwingungsgefährdet als Bereiche mit größerem Krümmungsradius.According to an advantageous embodiment, the housing interior may have a round, flattened cross-section transverse to the axial direction, so that a radius of curvature of the jacket varies in the circumferential direction. For example, the cross section is elliptical or oval. Appropriately, the two support areas can now be arranged in the peripheral regions with different radii of curvature. This embodiment is based on the recognition that the radius of curvature has an effect on the rigidity of the respective cladding region and thus an effect on the tendency of the respective cladding region to vibrate. In particular, areas with a smaller radius of curvature are less susceptible to vibration than areas with a larger radius of curvature.

Zweckmäßig kann nun der zweite Stützbereich, der insbesondere die größere zweite Vorspannung erzeugt, in einem Umfangsbereich angeordnet sein, der einen kleineren Krümmungsradius aufweist als ein Umfangsbereich, in dem der erste Stützbereich, der die kleinere erste Vorspannung erzeugt, angeordnet ist. Insbesondere können die beiden Stützbereiche in der Umfangsrichtung um mindestens 30° und höchstens 90° und vorzugsweise etwa um 45° voneinander beabstandet sein.Advantageously, the second support region, which in particular generates the larger second bias voltage, can now be arranged in a peripheral region which has a smaller radius of curvature than a peripheral region in which the first support region which generates the smaller first bias voltage is arranged. In particular, the two support areas in the circumferential direction by at least 30 ° and at most 90 ° and preferably about 45 ° apart from each other.

Bei einer anderen Ausführungsform kann die jeweilige Vorspanneinrichtung an einem Endboden oder an einem Zwischenboden angeordnet sein. Ebenso ist es möglich, im Gehäuseinnenraum eine Vorspannstruktur anzuordnen, welche die jeweilige Vorspanneinrichtung aufweist. Ein solcher Endboden bildet eine axiale Begrenzung des Gehäuseinnenraums. Im Unterschied dazu, ist ein solcher Zwischenboden innerhalb des Gehäuseinnenraums angeordnet, insbesondere axial zwischen den beiden Endböden, sofern das Schalldämpfergehäuse zwei Endböden aufweist.In another embodiment, the respective biasing means may be disposed on an end floor or on an intermediate floor. It is also possible to arrange a preload structure in the housing interior which has the respective pretensioning device. Such an end floor forms an axial boundary of the housing interior. In contrast, such an intermediate floor is disposed within the housing interior, in particular axially between the two end floors, if the muffler housing has two end floors.

Besonders vorteilhaft ist es, wenn die jeweilige Vorspanneinrichtung zumindest einen Hebel aufweist, der zwei voneinander beabstandete Stützkonturen aufweist, die sich jeweils in einem der Stützbereiche innen am Mantel abstützen. Ferner ist der jeweilige Hebel verschwenkbar angeordnet, so dass er eine räumlich fixierte Drehachse aufweist, die zwischen den beiden Stützkonturen bezüglich des Hebels insbesondere so positioniert sein kann, dass sich für die Stützkonturen unterschiedlich große Hebelarme ergeben. Da sich die Drehmomente am Hebel aufheben müssen, erzeugen die unterschiedlich großen Hebelarme in den beiden Stützkonturen die gewünschten unterschiedlich großen Vorspannungen.It when the respective biasing means comprises at least one lever which has two spaced support contours, which are supported in each case in one of the support areas on the inside of the jacket is particularly advantageous. Further, the respective lever is pivotally arranged so that it has a spatially fixed axis of rotation, which can be positioned between the two support contours relative to the lever in particular so that arise for the support contours different sized lever arms. Since the torques have to cancel the lever, the different sized lever arms in the two support contours produce the desired different sized biases.

Der besagte Hebel umfasst somit einen ersten Hebelarm, welcher der ersten Stützkontur und somit dem ersten Stützbereich zugeordnet ist und einen zweiten Hebelarm, welcher der zweiten Stützkontur und somit dem zweiten Stützbereich zugeordnet ist, wobei der erste Hebelarm insbesondere größer sein kann als der zweite Hebelarm, so dass die erste Vorspannung kleiner ist als die zweite Vorspannung, wenn sich der Hebel im montierten Zustand nicht bewegt und somit ein Momentengleichgewicht herrscht.The said lever thus comprises a first lever arm which is assigned to the first support contour and thus to the first support region and a second lever arm which is assigned to the second support contour and thus to the second support region, wherein the first lever arm can be larger than the second lever arm, in particular so that the first bias voltage is smaller than the second bias voltage, when the lever does not move in the mounted state and thus there is a moment equilibrium.

Zweckmäßig kann der jeweilige Hebel an einem Endboden oder an einem Zwischenboden oder an einer im Gehäuseinnenraum angeordneten Vorspannstruktur um besagte Drehachse verschwenkbar angeordnet sein. Dabei kann der jeweilige Hebel am jeweiligen Boden bzw. an der Vorspannstruktur um die Drehachse drehverstellbar gelagert oder um die Drehachse abrollbar angeordnet sein.Expediently, the respective lever can be arranged pivotably about an axis of rotation on an end floor or on an intermediate floor or on a pretensioning structure arranged in the housing interior. In this case, the respective lever on the respective bottom or on the biasing structure can be mounted rotatably adjustable about the axis of rotation or arranged to be rollable about the axis of rotation.

Gemäß einer anderen vorteilhaften Ausführungsform kann zumindest eine der Stützkonturen des jeweiligen Hebels an einem Stützkörper ausgebildet sein, der beweglich am jeweiligen Hebel angeordnet ist. Durch die Verwendung eines derartigen Stützkörpers kann eine verbesserte Stützwirkung erzielt werden. Insbesondere lässt sich der Mantel über eine größere Fläche abstützen bzw. stabilisieren, was die Schwingungsfähigkeit des Mantels in diesem Stützbereich signifikant reduziert.According to another advantageous embodiment, at least one of the support contours of the respective lever may be formed on a support body which is movably disposed on the respective lever. By using such a support body, an improved support effect can be achieved. In particular, the jacket can be supported or stabilized over a larger area, which significantly reduces the vibration capability of the jacket in this support area.

Vorzugsweise kann derselbe Stützkörper über mehrere Hebel gegen den Mantel vorgespannt sein, wodurch größere Stützkräfte realisierbar sind. Insbesondere kann der Stützkörper eine dem Mantel zugewandte konvexe Außenkontur aufweisen, die komplementär zur konkaven Innenkontur des jeweiligen Stützbereichs des Mantels geformt ist. Hierdurch ergibt sich eine sichere Abstützung zwischen Stützkörper und Mantel, die insbesondere Relativbewegungen zwischen Stützkörper und Mantel vermeidet.Preferably, the same support body can be biased by a plurality of levers against the jacket, whereby larger supporting forces can be realized. In particular, the support body may have a convex outer contour facing the shell, which is shaped to be complementary to the concave inner contour of the respective support region of the shell. This results in a secure Support between the support body and the jacket, which avoids in particular relative movements between the support body and the jacket.

Der Mantel kann in Wickelbauweise oder in Rohrbauweise oder aber in Halbschalenbauweise ausgestaltet sein. Bei Halbschalenbauweise kann der zweite Stützbereich proximal zu einer Trennebene angeordnet sein, in der die beiden Halbschalen aneinander befestigt sind, während dann der erste Stützbereich distal zur Trennebene angeordnet ist. Diese Bauweise beruht auf der Überlegung, dass die Mantelhalbschalen im Bereich der Trennebene eine höhere Aussteifung besitzen als beabstandet zur Trennebene, so dass die Aussteifung besonders effektiv distal zur Trennebene wirkt.The jacket can be configured in winding construction or pipe construction or in half-shell construction. In the case of a half-shell construction, the second support region can be arranged proximal to a parting plane in which the two half-shells are fastened to one another, while then the first support region is arranged distally to the parting plane. This design is based on the consideration that the shell halves in the region of the parting plane have a higher stiffener than spaced from the parting plane, so that the stiffening acts particularly effective distal to the parting plane.

Wie bereits eingangs erläutert, handelt es sich beim Schalldämpfergehäusebevorzugt um das Gehäuse eines Schalldämpfers einer Abgasanlage einer Brennkraftmaschine, insbesondere eines Kraftfahrzeugs.As already explained at the outset, the silencer housing is preferably the housing of a silencer of an exhaust system of an internal combustion engine, in particular of a motor vehicle.

Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.

Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Bauteile beziehen.Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.

Es zeigen, jeweils schematisch,

Fig. 1
einen stark vereinfachten Längsschnitt durch ein Schalldämpfergehäuse,
Fig. 2 bis 7
jeweils einen Querschnitt durch das Schalldämpfergehäuse, jedoch bei verschiedenen Ausführungsformen,
Fig. 8
einen Querschnitt des Schalldämpfergehäuses bei verschiedenen Montagezuständen a und b.
Show, in each case schematically,
Fig. 1
a greatly simplified longitudinal section through a silencer housing,
Fig. 2 to 7
each a cross section through the muffler housing, but in various embodiments,
Fig. 8
a cross section of the muffler housing at different mounting states a and b.

Entsprechend den Fig. 1 bis 8 umfasst ein zylindrisches Schalldämpfergehäuse 1 einen Mantel 2 und zwei Endböden 3, 4. Das Schalldämpfergehäuse 1 ist das Gehäuse 1 eines Schalldämpfers 5 einer in Fig. 1 nur im Bereich des Schalldämpfers 5 gezeigten Abgasanlage 6, die bei einer Brennkraftmaschine, insbesondere eines Kraftfahrzeugs, zum Abführen von Abgasen verwendet werden kann.According to the Fig. 1 to 8 a cylindrical muffler housing 1 comprises a jacket 2 and two end floors 3, 4. The muffler housing 1 is the housing 1 of a muffler 5 a in Fig. 1 only in the region of the muffler 5 shown exhaust system 6, which can be used in an internal combustion engine, in particular a motor vehicle, for the discharge of exhaust gases.

Der Mantel 2 umschließt einen Gehäuseinnenraum 7 in einer durch einen Doppelpfeil angedeuteten Umfangsrichtung 8. Die Endböden 3, 4 verschließen den Gehäuseinnenraum 7 in einer in Fig. 1 durch einen Doppelpfeil angedeuteten Axialrichtung 9. Dabei bilden die Endböden 3, 4 die axialen Stirnseiten oder Enden des Schalldämpfergehäuses 1. Die Endböden 3, 4 sind fest mit dem Mantel 2 verbunden. Bei einer anderen Ausführungsform kann der Mantel 2 auch so geformt sein, dass er die Funktion der Endböden 4,5, nämlich die axiale Begrenzung des Gehäuseinnenraums 7 übernimmt.The jacket 2 surrounds a housing interior 7 in a direction indicated by a double arrow circumferential direction 8. The end floors 3, 4 close the housing interior 7 in a in Fig. 1 In this case, the end bottoms 3, 4 form the axial end faces or ends of the muffler housing 1. The end floors 3, 4 are fixedly connected to the jacket 2. In another embodiment, the jacket 2 may also be shaped so that it assumes the function of the end floors 4, 5, namely the axial boundary of the housing interior 7.

Bei den hier gezeigten Ausführungsformen ist der Mantel 2 in Halbschalenbauweise realisiert, so dass er zwei Halbschalen 10, 11 umfasst, die in einer Trennebene 12 aneinander liegen bzw. aneinander befestigt sind. Insbesondere können die beiden Halbschalen 10, 11 quer zur Längsrichtung 9 abstehende Kragen 13 aufweisen, über welche die Halbschalen 10, 11 in der Trennebene 12 aneinander anliegen und über welche die Halbschalen 10, 11 aneinander befestigt sein können. Der in Fig. 1 gezeigte Längsschnitt des Schalldämpfergehäuses 1 ist dabei durch die Trennebene 12 geführt, so dass nur eine der Halbschalen 10, 11 sichtbar ist. Bei der vorstehend genannten anderen Ausführungsform können die Halbschalen 10. 11 so geformt sein, dass sie die beiden Endböden 4, 5 integral beinhalten, so dass auf separate Endböden verzichtete werden kann.In the embodiments shown here, the shell 2 is realized in half-shell construction, so that it comprises two half-shells 10, 11, which lie against one another in a parting plane 12 or are fastened to one another. In particular, the two half-shells 10, 11 may have transverse to the longitudinal direction 9 projecting collar 13, via which the half-shells 10, 11 abut each other in the parting plane 12 and over which the half-shells 10, 11 may be attached to each other. The in Fig. 1 shown longitudinal section of the muffler housing 1 is guided through the parting plane 12, so that only one of the half-shells 10, 11 is visible. In the above-mentioned other embodiment, the half-shells 10, 11 may be formed so as to integrally include the two end floors 4, 5 so that separate end floors can be dispensed with.

Alternativ zur Halbschalenbauweise kann der Mantel 2 auch in Wickelbauweise oder in Rohrbauweise ausgestaltet sein. Die nachfolgenden Erläuterungen gelten nicht nur für die gezeigte Halbschalenbauweise, sondern analog auch für die Rohrbauweise bzw. für die Wickelbauweise oder für eine beliebige andere geeignete Bauweise für das Schalldämpfergehäuse 1 bzw. den Mantel 2.As an alternative to the half-shell construction, the jacket 2 can also be configured in a winding construction or in a tubular construction. The following explanations apply not only to the half-shell construction shown, but also analogous to the pipe construction or for the winding construction or for any other suitable construction for the muffler housing 1 and the jacket. 2

Das Schalldämpfergehäuse 1 weist außerdem zumindest eine Vorspanneinrichtung 14 auf, die axial zwischen den Endböden 3, 4 im Gehäuseinnenraum 7 angeordnet ist. Im Beispiel der Fig. 1 sind zwei derartige Vorspanneinrichtungen 14 dargestellt. In den Fig. 2 bis 8 ist dagegen nur eine einzige Vorspanneinrichtung 14 gezeigt.The muffler housing 1 also has at least one biasing device 14, which is arranged axially between the end floors 3, 4 in the housing interior 7. In the example of Fig. 1 two such pretensioners 14 are shown. In the Fig. 2 to 8 however, only a single biasing device 14 is shown.

Die jeweilige Vorspanneinrichtung 14 stützt sich an einem ersten Stützbereich 15 des Mantels 2 innen am Mantel 2 unter einer nach außen orientierten, durch einen Pfeil angedeuteten ersten Vorspannung 16 ab. Ferner stützt sich die Vorspanneinrichtung 14 an einem zweiten Stützbereich 17 des Mantels 2 innen am Mantel 2 unter einer nach außen orientierten, ebenfalls durch einen Pfeil angedeuteten zweiten Vorspannung 18 ab. Dabei ist die zweite Vorspannung 18 vorzugsweise größer als die erste Vorspannung 16. Die beiden Stützbereiche 15, 17 sind voneinander beabstandet am Mantel 2 positioniert. Zweckmäßig sind die beiden Stützbereiche 15, 17 in der Umfangsrichtung 8 voneinander beabstandet. Sie können dabei grundsätzlich in derselben Axialebene des Mantels 2 liegen.The respective biasing device 14 is supported on a first support portion 15 of the shell 2 inside the jacket 2 under an outwardly oriented, indicated by an arrow first bias 16 from. Furthermore, the biasing device 14 is supported on a second support portion 17 of the shell 2 inside on the jacket 2 under an outwardly oriented, also indicated by an arrow second bias 18 from. In this case, the second bias voltage 18 is preferably greater than the first bias voltage 16. The two support portions 15, 17 are spaced from each other on the jacket 2 is positioned. Suitably, the two support portions 15, 17 are spaced apart in the circumferential direction 8. You can basically lie in the same axial plane of the shell 2.

Bei einer alternativen Ausführungsform können die beiden Stützbereiche 15, 17 in der Axialrichtung 9 voneinander beabstandet angeordnet sein. Dabei können sie im gleichen Umfangsabschnitt liegen, also axial zueinander fluchtend ausgerichtet sein. Grundsätzlich können sie jedoch auch in der Umfangsrichtung 8 voneinander beabstandet sein.In an alternative embodiment, the two support portions 15, 17 may be arranged spaced apart in the axial direction 9. They may lie in the same peripheral portion, so be aligned axially aligned with each other. In principle, however, they can also be spaced apart in the circumferential direction 8.

Bei den hier gezeigten bevorzugten Ausführungsformen besitzt das Schalldämpfergehäuse 1 bzw. sein Gehäuseinnenraum 7 quer zur Axialrichtung 9 einen runden, jedoch nicht kreisförmigen, sondern abgeflachten Querschnitt, der insbesondere oval oder elliptisch sein kann. Insbesondere kann dabei ein Krümmungsradius 19 des Mantels 2 in der Umfangsrichtung 8 variieren. Die beiden Stützbereiche 15, 17 befinden sich dann zweckmäßig in Umfangsbereichen 20, 21, die verschiedene Krümmungsradien 19 aufweisen. Insbesondere ist dabei vorgesehen, dass der erste Stützbereich 15 in einem ersten Umfangsbereich 20 angeordnet ist, der einen größeren Krümmungsradius 19 aufweist als ein zweiter Umfangsbereich 21, in dem der zweite Stützbereich 17 angeordnet ist. Mit anderen Worten, der der größeren zweiten Vorspannung 18 zugeordnete zweite Stützbereich 17 befindet sich im zweiten Umfangsbereich 21 mit kleinerem Krümmungsradius 19. Je kleiner der Krümmungsradius 19, desto stabiler ist der Mantel 2, desto größere Kräfte können am Mantel 2 ohne schädliche Deformation abgestützt werden.In the preferred embodiments shown here, the muffler housing 1 or its housing interior 7 has a transversely to the axial direction 9 has a round, but not circular, but flattened cross section, which may be particularly oval or elliptical. In particular, a radius of curvature 19 of the jacket 2 in the circumferential direction 8 can vary. The two support regions 15, 17 are then expediently in peripheral regions 20, 21, which have different radii of curvature 19. In particular, it is provided that the first support region 15 is arranged in a first circumferential region 20, which has a larger radius of curvature 19 than a second peripheral region 21, in which the second support region 17 is arranged. In other words, the second support area 17 associated with the larger second pretension 18 is located in the second peripheral area 21 with a smaller radius of curvature 19. The smaller the radius of curvature 19, the more stable is the jacket 2, the greater the forces which can be supported on the jacket 2 without damaging deformation ,

Zweckmäßig sind die beiden Stützbereiche 15, 17 in der Umfangsrichtung 8 um mindestens 30° und um höchstens 90° voneinander beabstandet. Bei den gezeigten Beispielen sind die beiden Stützbereiche 15, 17 in der Umfangsrichtung jeweils um etwa 45° voneinander beabstandet.Suitably, the two support portions 15, 17 in the circumferential direction 8 spaced by at least 30 ° and at most 90 ° apart. In the examples shown, the two support areas 15, 17 are each spaced apart in the circumferential direction by approximately 45 °.

Wie sich den Fig. 2 bis 8 entnehmen lässt, ist bei dem hier in Halbschalenbauweise ausgestalteten Mantel 2 der erste Stützbereich 15 distal zur Trennebene 12 angeordnet, während der zweite Stützbereich 21 proximal zur Trennebene 12 angeordnet ist.How the Fig. 2 to 8 can be seen, in the case 2 designed here in half-shell construction, the first support portion 15 is disposed distal to the parting plane 12, while the second support portion 21 is disposed proximal to the parting plane 12.

Gemäß Fig. 1 ist die links dargestellte Vorspanneinrichtung 14 an einem der Endböden 3, 4 angeordnet. Im Unterschied dazu ist die in Fig. 1 rechts gezeigte Vorspanneinrichtung 14 an einem Zwischenboden 22 angeordnet, der axial zwischen den beiden Endböden 3, 4 angeordnet ist. Im Unterschied dazu zeigt Fig. 3 eine Ausführungsform, bei der die jeweilige Vorspanneinrichtung 14 eine Vorspannstruktur 23 aufweist, die ohne Boden auskommt und axial zwischen den Endböden 3, 4 im Gehäuseinnenraum 7 angeordnet werden kann.According to Fig. 1 the biasing device 14 shown on the left is arranged on one of the end floors 3, 4. In contrast, the in Fig. 1 Right biasing means 14 shown arranged on an intermediate bottom 22, which is arranged axially between the two end floors 3, 4. In contrast, shows Fig. 3 an embodiment in which the respective biasing means 14 has a biasing structure 23, which does not require floor and can be arranged axially between the end floors 3, 4 in the housing interior 7.

Gemäß Fig. 2 kann besagter Zwischenboden 22 bspw. zumindest eine Durchgangsöffnung 35 und/oder zumindest eine Perforation 36 aufweisen.According to Fig. 2 For example, said intermediate bottom 22 may have at least one passage opening 35 and / or at least one perforation 36.

Vorzugsweise weist die jeweilige Vorspanneinrichtung 14 zumindest einen hier nur vereinfacht dargestellten Hebel 24 auf, der zwei voneinander beabstandete Stützkonturen, nämlich eine erste Stützkontur 25 und eine zweite Stützstruktur 26 aufweist, die voneinander beabstandet am jeweiligen Hebel 24 angeordnet sind. Insbesondere befinden sich die beiden Stützstrukturen 25, 26 an den voneinander entfernten Enden des jeweiligen Hebels 24. Die erste Stützkontur 25 stützt sich im ersten Stützbereich 15 innen am Mantel 2 ab. Die zweite Stützkontur 26 stützt sich im zweiten Stützbereich 17 innen am Mantel 2 ab. Dem Hebel 24 ist eine Drehachse 27 zugeordnet, um welche der Hebel 24 beweglich ist. Die Drehachse 27 ist innerhalb des Schalldämpfergehäuses 1 weitgehend lagefixiert bzw. räumlich fix. Die Drehachse 27 ist am Hebel 24 zwischen den Stützkonturen 25, 26 angeordnet, und zwar asymmetrisch, so dass sich am Hebel 24 für die beiden Stützkonturen 25, 26 zwei unterschiedlich große Hebelarme ausbilden, nämlich ein erster Hebelarm 28, der von der Drehachse 27 zur ersten Stützkontur 25 führt, und ein zweiter Hebelarm 29, der von der Drehachse 27 zur zweiten Stützkontur 26 führt. Erkennbar ist der erste Hebelarm 28 größer als der zweite Hebelarm 29. Da der Hebel 27 im montierten Zustand des Schalldämpfergehäuses 1 unbeweglich ruht, sind die am Hebel 24 angreifenden Drehmomente gleich groß bzw. im Gleichgewicht. In der Folge ist die am kürzeren zweiten Hebelarm 29 in den zweiten Stützbereich 17 eingeleitete zweite Vorspannung 18 größer als die über den größeren ersten Hebelarm 28 in den ersten Stützbereich 15 eingeleitete erste Vorspannung 16.Preferably, the respective biasing means 14 at least one lever 24 shown here only in simplified form, the two spaced support contours, namely a first support contour 25 and a second support structure 26 which are spaced from each other on the respective lever 24. In particular, the two support structures 25, 26 are located at the mutually remote ends of the respective lever 24. The first support contour 25 is supported in the first support region 15 on the inside of the casing 2. The second support contour 26 is supported in the second support region 17 inside the jacket 2. the Lever 24 is associated with an axis of rotation 27 about which the lever 24 is movable. The axis of rotation 27 is largely fixed in position within the muffler housing 1 or spatially fixed. The axis of rotation 27 is arranged on the lever 24 between the support contours 25, 26, and that asymmetrically, so that form two different sized lever arms on the lever 24 for the two support contours 25, 26, namely a first lever arm 28 of the rotation axis 27 for first support contour 25 leads, and a second lever arm 29 which leads from the axis of rotation 27 to the second support contour 26. Recognizable, the first lever arm 28 is greater than the second lever arm 29. Since the lever 27 immobile rests in the assembled state of the muffler housing 1, the torque acting on the lever 24 are equal or in equilibrium. As a result, the second preload 18 introduced at the shorter second lever arm 29 into the second support region 17 is greater than the first preload 16 introduced via the larger first lever arm 28 into the first support region 15.

Die genannten Hebelarme 28, 29 sind hinsichtlich ihrer wirksamen Hebelarmlänge, also hinsichtlich ihrer physikalischen bzw. mathematischen Hebelarmlänge zu verstehen.The said lever arms 28, 29 are to be understood in terms of their effective Hebelarmlänge, ie in terms of their physical or mathematical Hebelarmlänge.

Entsprechend den Fig. 1, 2 und 5 bis 8 kann der jeweilige Hebel 24 an einem der Endböden 3, 4 oder an einem solchen Zwischenboden 22 um die Drehachse 27 dadurch verschwenkbar angeordnet sein, dass er am jeweiligen Boden 3, 4, 22 um die Drehachse 27 drehverstellbar gelagert ist. Ein entsprechendes Drehlager 30 ist in den Figuren vereinfacht dargestellt. Bei dieser Ausführungsform ist die Raumlage der Drehachse 27 fixiert.According to the Fig. 1, 2 and 5 to 8 For example, the respective lever 24 on one of the end shelves 3, 4 or on such an intermediate floor 22 can be pivotably arranged about the axis of rotation 27, so that it is rotatably mounted on the respective floor 3, 4, 22 about the axis of rotation 27. A corresponding pivot bearing 30 is shown in simplified form in the figures. In this embodiment, the spatial position of the rotation axis 27 is fixed.

Alternativ kann die Verschwenkbarkeit des Hebels 24 um die Drehachse 27 gemäß Fig. 4 auch dadurch realisiert sein, dass der jeweilige Hebel 24 im Bereich der Drehachse 27 abrollbar am jeweiligen Boden 3, 4, 22 angeordnet ist. In Fig. 4 ist eine hierfür geeignete Abrollkontur 31 vereinfacht dargestellt. Bei dieser Ausführungsform kann sich die Raumlage der Drehachse 27 durch die Abrollbewegung leicht verändern, so dass sie in diesem Fall nur im Wesentlichen fixiert ist.Alternatively, the pivotability of the lever 24 about the rotation axis 27 according to Fig. 4 also be realized in that the respective lever 24 in the region of the axis of rotation 27 is arranged rollable on the respective bottom 3, 4, 22. In Fig. 4 is a suitable rolling contour 31 shown simplified. In this embodiment, the spatial position of the axis of rotation 27 can change slightly by the rolling movement, so that it is only substantially fixed in this case.

Bei der in Fig. 3 gezeigten Ausführungsform weist die Vorspanneinrichtung 14 wie bereits erwähnt eine Vorspannstruktur 23 auf, die sich axial zwischen den Endböden 3, 4 befindet. Im Beispiel der Fig. 3 umfasst diese Vorspannstruktur 23 mehrere Hebel 24, nämlich rein exemplarisch und ohne Beschränkung der Allgemeinheit genau vier derartige Hebel 24, die in der Umfangsrichtung 8 verteilt angeordnet sind. Jeder Hebel 24 stützt sich an einem ersten Stützbereich 15 und an einem zweiten Stützbereich 17 von innen am Mantel 2 ab. Dementsprechend sind hier vier erste Stützbereiche 15 und vier zweite Stützbereiche 17 in der Umfangsrichtung 8 verteilt am Mantel 2 ausgebildet. Die Stützstruktur 23 kann einen vergleichsweise steifen Träger 32 aufweisen, an dem die einzelnen Hebel 24 angeordnet sind, wobei die Verschwenkbarkeit des jeweiligen Hebels 24 um die zugehörige Drehachse 27 durch die Elastizität des Trägers 32 oder durch entsprechende Lagerstellen realisiert sein kann.At the in Fig. 3 As already mentioned, the pretensioning device 14 has a pretensioning structure 23, which is located axially between the end floors 3, 4. In the example of Fig. 3 comprises this biasing structure 23 a plurality of levers 24, namely purely exemplary and without limiting the generality of exactly four such lever 24, which are arranged distributed in the circumferential direction 8. Each lever 24 is supported on a first support region 15 and on a second support region 17 from the inside of the casing 2. Accordingly, four first support regions 15 and four second support regions 17 are distributed in the circumferential direction 8 on the casing 2. The support structure 23 may have a comparatively stiff support 32, on which the individual levers 24 are arranged, wherein the pivotability of the respective lever 24 about the associated axis of rotation 27 may be realized by the elasticity of the support 32 or by corresponding bearing points.

Bei den Ausführungsformen der Fig. 5 und 7 umfasst die jeweilige Vorspanneinrichtung 14 einen Stützkörper 33, an dem eine der Stützkonturen 15, 17, hier die erste Stützkontur 15 ausgebildet ist. Dieser Stützkörper 33 ist dabei beweglich an wenigstens einem solchen Hebel 24 angeordnet. In den Beispielen der Fig. 5 und 7 ist für die bewegliche Kopplung zwischen Stützkörper 33 und jeweiligem Hebel 24 jeweils ein Langloch 34 vorgesehen, das eine Relativbewegung zwischen Stützkörper 33 und zugehörigem Hebel 24 ermöglicht. Ferner ist bei den hier gezeigten Beispielen der Fig. 5 und 7 derselbe Stützkörper 33 gleichzeitig über mehrere Hebel 24, nämlich bspw. über jeweils zwei Hebel 24 gegen den Mantel 2 vorgespannt. Ferner besitzt der jeweilige Stützkörper 33 zweckmäßig eine dem Mantel 2 zugewandte konvexe Außenkontur, die komplementär zur konkaven Innenkontur des jeweiligen Stützbereichs 15, 17, hier des ersten Stützbereichs 15 des Mantels 2 geformt ist. Somit ergibt sich eine großflächige und stabile Abstützung für den Stützkörper 33 am Mantel 2.In the embodiments of the Fig. 5 and 7 the respective biasing means 14 comprises a support body 33, on which one of the support contours 15, 17, here the first support contour 15 is formed. This support body 33 is movably arranged on at least one such lever 24. In the examples of Fig. 5 and 7 is provided for the movable coupling between the support body 33 and the respective lever 24 each have a slot 34 which allows a relative movement between the support body 33 and associated lever 24. Furthermore, in the examples shown here Fig. 5 and 7 the same support body 33 at the same time over a plurality of levers 24, namely, for example. Via two levers 24 biased against the jacket 2. Furthermore, the respective owns Support body 33 expediently a coat 2 facing convex outer contour which is complementary to the concave inner contour of the respective support portion 15, 17, here of the first support portion 15 of the shell 2 is formed. This results in a large-area and stable support for the support body 33 on the shell. 2

Bei den Fig. 1 bis 5 und 8 sind die Hebel 24 jeweils an einer geeigneten Stelle des jeweiligen Bodens 3, 4, 22 axial an den jeweiligen Boden 3, 4, 22 angebaut. Im Unterschied dazu zeigen die Fig. 6 und 7 Ausführungsformen, bei denen die Hebel 24 randseitig an den Zwischenboden 22 angebaut sind, so dass sich die Hebel 24 im montierten Zustand radial zwischen dem Zwischenboden 22 und dem Mantel 2 befinden.Both Fig. 1 to 5 and 8th the levers 24 are each mounted on a suitable position of the respective bottom 3, 4, 22 axially to the respective bottom 3, 4, 22. In contrast, the show Fig. 6 and 7 Embodiments in which the levers 24 are mounted on the edge of the intermediate bottom 22, so that the lever 24 are in the assembled state radially between the intermediate bottom 22 and the shell 2.

Die Montage des Schalldämpfergehäuses 1 wird anhand der Fig. 8a und 8b näher erläutert:The assembly of the muffler housing 1 is based on the Fig. 8a and 8b explained in more detail:

Zunächst wird die eine (zweite) Halbschale 11 mit sämtlichen innenliegenden Komponenten des Schalldämpfergehäuses 1 und - je nach Bauweise - mit den Endböden 3, 4 bestückt. Anschließend wird die andere (erste) Halbschale 10 angebaut. Während des Anbringens der anderen (ersten) Halbschale 10 kommt diese gemäß Fig. 8a zunächst im zweiten Stützbereich 17 an der zweiten Stützkontur 26 des Hebels 24 zur Anlage, so dass diese (erste) Halbschale 10 bei weiterer Annäherung an die andere (zweite) Halbschale 11 eine Kraft auf den Hebel 24 einleitet. Verzögert kommt dann auch der erste Stützbereich 15 mit der ersten Stützkontur 25 des Hebels 24 in Kontakt, wodurch dann bei weiterer Annäherung der beiden Halbschalen 10, 11 aneinander die Vorspannungen im Hebel 24 aufgebaut werden. Fig. 8b zeigt den Zustand bei vollständiger Annäherung der beiden Halbschalen 10, 11.First, the one (second) half shell 11 with all the internal components of the muffler housing 1 and - depending on the design - equipped with the end floors 3, 4. Subsequently, the other (first) half-shell 10 is grown. During the attachment of the other (first) half-shell 10 comes this according Fig. 8a initially in the second support region 17 on the second support contour 26 of the lever 24 to the system, so that this (first) half-shell 10 on further approaching the other (second) half-shell 11 introduces a force on the lever 24. Delayed then comes the first support portion 15 with the first support contour 25 of the lever 24 in contact, which then on closer approach of the two half-shells 10, 11 together, the bias voltages are built in the lever 24. Fig. 8b shows the state at full approach of the two half-shells 10, 11th

Claims (15)

  1. A silencer housing, having a shell (2), which encloses a housing interior (7) in circumferential direction (8), characterized by at least one preload device (14) which is arranged in the housing interior (7), which supports itself on a first support region (15) of the shell (2) on the shell inside (2) subject to a first preload (16) orientated towards the outside and which supports itself on a second support region (17) of the shell (2) on the shell (2) inside that is spaced from the first support region (15) subject to a second preload (18) which is orientated towards the outside.
  2. The silencer housing according to Claim 1, characterized
    - in that the silencer housing (1) is configured cylindrically and comprises two end bottoms (3, 4), which axially close off the housing interior (7) and are connected to the shell (2) in a fixed manner, wherein the preload device (14) is arranged between the end bottoms (3, 4), or
    - in that the silencer housing (1) comprises two half shells (10, 11), which axially delimit the housing interior (7) in circumferential direction.
  3. The silencer housing according to Claim 1 or 2, characterized in that the two support regions (15, 17) are spaced from one another in the circumferential direction (8).
  4. The silencer housing according to Claim 3, characterized in that the two support regions (15, 17) lie in the same axial plane of the shell (2).
  5. The silencer housing according to any one of the Claims 1 to 3, characterized in that the two support regions (15, 17) are axially spaced from one another in the axial direction (9).
  6. The silencer housing according to any one of the Claims 1 to 5, characterized in that the housing interior (7) transversely to the axial direction (9) comprises a round, flattened cross section, so that a curvature radius (19) of the shell (2) varies in the circumferential direction (8), wherein the two support regions (15, 17) are arranged in circumferential regions (20, 21) with different curvature radii (19).
  7. The silencer housing according to Claim 6, characterized in that the second support region (17) is arranged in a second circumferential region (21), which comprises a smaller curvature radius (19) than a first circumferential region (20), in which the first support region (15) is arranged.
  8. The silencer housing according to Claim 6 or 7, characterized in that the two support regions (15, 17) are spaced from one another in the circumferential direction (8) by at least 30° and a maximum of 90° and preferentially by approximately 45°.
  9. The silencer housing according to any one of the Claims 1 to 8, characterized in that the respective preload device (14) is arranged on an end bottom (3, 4) of the silencer housing (1) axially delimiting the housing interior (7) or on an intermediate bottom (22) which is arranged in the housing interior (7) in particular axially between two end bottoms (3, 4).
  10. The silencer housing according to any one of the Claims 1 to 9, characterized in that the respective preload device (14) comprises at least one lever (24) which has two support contours (25, 26) which are spaced from one another, each of which supports itself in one of the support regions (15, 17) on the shell (2) inside, wherein an axis of rotation (27) of the lever (24) is positioned between the support contours (25, 26) so that lever arms (28, 29) which are different in size are obtained for the support structures (25, 26).
  11. The silencer housing according to Claim 10, characterized in that the respective lever (24) is pivotably arranged about the axis of rotation (27) on an end bottom (3, 4) axially delimiting the housing interior (7) or on an intermediate bottom (22) which is arranged in the housing interior (7) in particular axially between two end bottoms (3, 4), wherein in particular the respective lever (24) can be rotation-adjustably mounted about the axis of rotation (27) or be arranged so as to be able to roll about the axis of rotation (27) on the respective bottom (3, 4, 22).
  12. The silencer housing according to Claim 10, characterized in that the respective preload device (14) comprises a preload structure (23) which is arranged in the housing interior (7) in particular between the end bottoms (3, 4), which comprises multiple such levers (24) which are arranged distributed in the circumferential direction (8).
  13. The silencer housing according to any one of the Claims 10 to 12, characterized in that at least one of the support structures (25, 26) of the respective lever (24) is formed on a support body (33), which is moveably arranged on the respective lever (24).
  14. The silencer housing according to Claim 13, characterized
    - in that the same support body (33) is preloaded against the shell (2) via multiple levers (24), and/or
    - in that the support body (33) has a convex outer contour facing the shell (2), which is formed complementarily to the concave inner contour of the respective support region (15, 17) of the shell (2).
  15. The silencer housing according to any one of the Claims 1 to 14, characterized in that the shell (2) is configured in wrap-around design or in tubular design or in semi-shell design, wherein it can be provided in particular that the second support region (17) in the case of a shell (2) configured in semi-shell design is arranged proximately to a separating plane (12), in which the two half shells (10, 11) are fastened to one another, while the first support region (15) is arranged distally to the separating plane (12).
EP11189883.9A 2010-12-07 2011-11-21 Housing of silencer Active EP2463492B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010062569A DE102010062569A1 (en) 2010-12-07 2010-12-07 casing

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EP2463492A1 EP2463492A1 (en) 2012-06-13
EP2463492B1 true EP2463492B1 (en) 2015-01-07

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US (1) US8733498B2 (en)
EP (1) EP2463492B1 (en)
JP (1) JP5379840B2 (en)
CN (1) CN102562242B (en)
DE (1) DE102010062569A1 (en)
ES (1) ES2532076T3 (en)

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DE102015101980A1 (en) * 2015-02-11 2016-08-11 Tenneco Gmbh Exhaust pipe with deformed portion
GB2536956B (en) * 2015-04-02 2018-10-31 Ford Global Tech Llc Muffler for enhanced crash safety

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GB0327401D0 (en) * 2003-11-25 2003-12-31 Emmett Malcolm D Silencer for exhaust systems
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DE102004042110B3 (en) * 2004-08-30 2005-09-22 J. Eberspächer GmbH & Co. KG Automotive silencer has cylindrical sleeve with dished inner partition in contact with sleeve inner face
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CN101289952B (en) * 2008-06-03 2011-09-21 重庆大学 Expanding cavity adjustable exhaust silencer
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EP2518286B1 (en) * 2011-04-28 2015-07-15 Eberspächer Exhaust Technology GmbH & Co. KG Exhaust silencer for motor vehicles

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Publication number Publication date
DE102010062569A1 (en) 2012-06-14
CN102562242B (en) 2014-11-05
JP5379840B2 (en) 2013-12-25
US8733498B2 (en) 2014-05-27
EP2463492A1 (en) 2012-06-13
ES2532076T3 (en) 2015-03-24
CN102562242A (en) 2012-07-11
JP2012122480A (en) 2012-06-28
US20120138382A1 (en) 2012-06-07

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