EP3173595B1 - Silencieux - Google Patents

Silencieux Download PDF

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Publication number
EP3173595B1
EP3173595B1 EP16199742.4A EP16199742A EP3173595B1 EP 3173595 B1 EP3173595 B1 EP 3173595B1 EP 16199742 A EP16199742 A EP 16199742A EP 3173595 B1 EP3173595 B1 EP 3173595B1
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EP
European Patent Office
Prior art keywords
resonator
overpipe
axially
resonator pipe
silencer 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.)
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Application number
EP16199742.4A
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German (de)
English (en)
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EP3173595A1 (fr
Inventor
Peter Kast
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
Original Assignee
Eberspaecher Exhaust Technology GmbH and Co KG
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Publication of EP3173595A1 publication Critical patent/EP3173595A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/023—Helmholtz resonators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/084—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
    • 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
    • F01N2470/02—Tubes being perforated
    • 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
    • F01N2470/24—Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/02—Two or more expansion chambers in series connected by means of tubes

Definitions

  • the present invention relates to a muffler for an exhaust system of an internal combustion engine.
  • Mufflers with housing usually have a peripheral circumferential shell and two axial ends (eg JPS54143941U . EP2520775 A1 . WO2013125764 A1 )
  • the housing can be arranged axially between the ends at least one intermediate bottom.
  • Such shelves serve on the one hand to redesignsteifen the case.
  • such shelves can also be used to position or hold tubes within the housing.
  • a welded connection can be used to fasten such a pipe to an intermediate floor.
  • welds in the, usually ferritic, alloys used to make the tubes and shelves in silencers increase the risk of intergranular corrosion.
  • Such form and / or frictional connections come without material connection, whereby the risk of intergranular corrosion is significantly reduced.
  • Such positive and / or frictional connections are, for example, compounds which are associated with a plastic deformation on the tube and / or on the intermediate bottom in order to bring about the desired fixation. Particularly advantageous in this case, a rib fixation has been found.
  • the intermediate bottom in the region of an opening, in which the respective tube is to be inserted, equipped with a ring collar. Then the pipe is inserted into the opening, so that the ring collar runs around the outside of the pipe.
  • the respective rib can be configured as an annular rib which extends annularly in the circumferential direction or can be formed by a plurality of rib segments distributed in the circumferential direction. For such a rib fixation only tubes with a comparatively large diameter currently come into consideration.
  • Helmholtz resonators are often used, which have a resonator and a resonator tube, which is often referred to as a neck.
  • a Helmholtz resonator is not flowed through by the exhaust gas, but only fluidly or acoustically coupled to the exhaust gas flow.
  • the resonant frequency of such a Helmholtz resonator is determined by the volume enclosed by the resonator chamber and by the dimensions of the resonator tube.
  • the dimensions of the resonator tube are determined at least by the diameter of the resonator tube and by the length of the resonator tube.
  • the resonator tube In order to fix such a resonator tube by means of a rib fixation on at least one intermediate floor, the resonator tube must be provided with a relatively large diameter. Due to the relationship described above between the resonance frequency and the Dimensions of the resonator tube, an increase in the tube diameter also requires an increase in the tube length, if the resonance frequency is to remain constant. By specifying a comparatively large diameter for the resonator tube, problems may therefore arise in silencers which have a relatively small, predetermined installation space. In particular, the required length for the resonator tube may be greater than the installation space available in the muffler for this purpose.
  • the present invention is concerned with the problem of providing an improved embodiment for a silencer of the type described above, which is particularly characterized in that on the one hand a Helmholtz resonator can be realized, while on the other hand, the resonator tube by means of a positive and / or non-positive connection at a the resonator space limiting intermediate floor can be attached.
  • the invention is based on the general idea of extending the resonator tube within the resonator cavity by means of a tube-in-tube arrangement.
  • an end section of the resonator tube is inserted into an overtube inside the resonator chamber.
  • the overtube is closed at the end, which faces away from the intermediate bottom, which is penetrated by the resonator tube.
  • the overtube has an internal cross-section which is larger than an external cross-section which the resonator tube has in its end section.
  • the length of the overtube to the length of the resonator tube are added.
  • the volume of the additional space can be added to the volume enclosed by the resonator tube.
  • an embodiment in which the overtube is axially secured by means of a spaced axially from the intermediate bottom separate form and / or frictional connection on the resonator tube.
  • the overtube is fastened exclusively to the resonator tube, so that it is radially and axially spaced in the resonator chamber from the rest of the housing.
  • the overtube it is also possible to fix the overtube to the housing so that it has no connection to the resonator tube.
  • the resonator tube ends free-standing within the overtube.
  • the overtube in the resonator can also end free-standing.
  • the overtube to the resonator tube is arranged contactless and radially spaced at the intermediate bottom is supported. This can lead to a simplified production.
  • the respective positive and / or non-positive connection can be produced by means of a plastic deformation of the resonator tube and / or the intermediate bottom in the region of the connection.
  • the overtube can protrude into the intermediate bottom and be attached axially thereto by means of the positive and / or non-positive connection on the resonator tube.
  • the overtube can protrude into the intermediate bottom and be attached axially thereto by means of the positive and / or non-positive connection on the resonator tube.
  • the respective positive and / or non-positive connection may have an annular collar formed on the intermediate base or on the overtube, which surrounds the resonator tube in the circumferential direction.
  • the respective positive and / or non-positive connection may have two ribs formed on the resonator tube, which are arranged axially on both sides of the respective annular collar for the axial attachment of the annular collar on the resonator tube.
  • an outer cross section of the ribs is greater than an inner cross section of the respective annular collar.
  • the respective annular collar is axially fixed by the two ribs by positive engagement on the resonator tube.
  • Such a form and / or frictional connection can also be referred to as rib fixation.
  • the ribs can be produced by plastic deformation of the resonator tube, e.g. by means of a hydraulic hydroforming process.
  • the region of the resonator tube lying axially between the ribs can also be radially plastically expanded, ie calibrated, in order to press it with the annular collar.
  • Machines for producing such rib fixations are e.g. offered by Upland Technologies Inc. of Cambridge, Ontario, Canada under the name "Ridge Lock Machine".
  • the respective annular collar can abut axially between the ribs radially on the outside of the resonator tube. If a common rib fixation is provided for the intermediate bottom and the overtube on the resonator tube, only one ring collar is suitably supported Radially on the outside of the resonator tube, while at this ring collar then the other ring collar is supported radially on the outside.
  • the overtube is arranged without contact with the resonator, it may be provided in another embodiment, that the annular collar of the intermediate bottom forms an inner U-leg of the resonator tube in the circumferential direction enclosing U-shaped edge portion of the intermediate bottom, said overtube radially on an outer U -Skel of this edge region is supported on a side facing away from the resonator tube side.
  • a U-base which connects the two U-legs together, is then facing the additional space and limits this axially. This results in a particularly easy to implement embodiment.
  • the over-tube can be axially closed at its end remote from the intermediate tube penetrated by the resonator tube end by the housing or its shell or by another intermediate bottom, which limits the resonator axially.
  • a communicating connection between resonator tube and additional space can be realized particularly simply by arranging the resonator tube with an open end axially spaced from this closed end of the overtube.
  • the over-tube may be axially closed off at its end facing away from the latter, which is penetrated by the resonator tube, by means of a separate cover which is fastened to the overtube.
  • the resonator tube carries the overtube, while the overtube is spaced with the lid to the housing, so has no contact.
  • the intermediate space can be fluidically connected to the resonator tube via a proximal connection, which is located in the region of one end of the resonator tube, and via a distal, axially spaced distal connection located at the over tube in an area remote from the end of the resonator tube , be fluidly connected to the resonator.
  • the axial distance between the proximal connection and the distal connection corresponds to the extension of the resonator tube, which is achieved by means of the overtube.
  • the additional space has no further fluidic connection to the resonator tube and to the resonator chamber, so that only the proximal connection and the distal connection are provided. The acoustic coupling between the resonator tube and the resonator cavity thus takes place through the proximal connection, through the intermediate space and through the distal connection.
  • the proximal connection can be formed by a gap between the closed end of the overtube and the open end of the resonator tube.
  • the proximal connection can be formed by a perforation formed on the tube, wherein the end of the resonator tube is closed.
  • a common cover may be provided for closing the end of the resonator tube and the end of the overtube, which is fastened to the resonator tube and / or to the overtube.
  • a lid may for example be pressed or jammed or crimped with the respective tube.
  • the distal connection may be formed by a perforation formed on the over tube.
  • the respective perforation may have a plurality of openings distributed in the circumferential direction.
  • the housing of the muffler come basically any designs into consideration, e.g. Half-shell construction, wound construction, tube or barrel construction.
  • the shell of the housing is formed by a jacket extending in the circumferential direction, wherein the axial ends of the housing are each formed by a separate end bottom with respect to the shell.
  • the intermediate floor is then arranged axially between these end floors and spaced therefrom.
  • the sheath is formed by two half-shells, which also form the axial ends of the housing.
  • FIG. 1 includes a muffler 1, which is suitable for use in an exhaust system of an internal combustion engine, preferably a road vehicle, a housing 2, whose longitudinal central axis 3 defines an axial direction 4, which is indicated in the figures by a double arrow.
  • the housing 2 can have any square and non-angular cross-section, such as a rectangular, square, circular or elliptical or oval cross-section.
  • the housing 2 has a circumferentially encircling shell 5 and two axial ends 6.
  • the housing 2 may be made for example in winding construction or in barrel or tube construction.
  • the sheath 5 formed by a closed in the circumferential direction circumferential jacket 43.
  • the housing 2 At the axial ends 6 are then end floors 44, the housing 2 at the two axial Close ends 6. It is clear that the housing 2 can in principle also be produced in half-shell construction. Then at least the two end floors 44 are missing.
  • the muffler 1 may have within the housing 2 at least one intermediate bottom 7, 8, 9, 10, which is arranged axially between the two ends 6 and between the end plates 44 and enclosed by the shell 5 and the jacket 43.
  • the Fig. 1 four intermediate floors 7, 8, 9, 10 are provided, of which in principle only the intermediate bottom 7 provided with the reference numeral 7 is required, while the other intermediate floors 8, 9, 10 can basically be dispensed with. Subsequently, these intermediate floors for better distinction as the first, second, third and fourth intermediate bottom 7, 8, 9, 10 according to their sequence in Fig. 1 be designated from right to left.
  • the muffler 1 contains a Helmholtz resonator 11, which is not traversed by the exhaust gas during operation of the muffler 1.
  • the Helmholtz resonator 11 has a resonator chamber 12 and a resonator tube 13. Via the resonator tube 13, a region 14 through which exhaust gas flows during operation of the muffler 1 is acoustically and fluidically coupled to the resonator chamber 12.
  • the resonator chamber 12 is bounded radially by the shell 5 or by the jacket 43 and axially on the one hand by said first intermediate bottom 7. Axial on the other hand, the resonator 12 is limited for example by the housing 2, in the example shown by one of the end plates 44.
  • the resonator tube 13 penetrates the first intermediate bottom 7 and is axially fixed thereto by means of a positive and / or frictional connection 15, which will be described below with reference to FIGS Fig. 2 to 6 will be explained in more detail.
  • Fig. 1 Closes axially to the resonator 12 an expansion chamber 16 or an absorption chamber 16 at.
  • the absorption chamber 16 differs from the expansion chamber 16 in that the absorption chamber 16 is filled with a sound-absorbing material.
  • the expansion chamber 16 or absorption chamber 16 is axially bounded by the first and second intermediate bottom 7, 8 and radially through the shell 5 and the shell 43 and completely penetrated by the resonator tube 13. Accordingly, the resonator tube 13 also penetrates the second intermediate bottom 8, whereby the second intermediate bottom 8 on the resonator tube 13 can likewise be fastened by a positive and / or frictional connection 15.
  • an inlet chamber 17 is further formed, into which an inlet pipe 42 opens, which passes through the jacket 43 for this purpose.
  • a connecting tube 18 connects the inlet chamber 17 with a deflection chamber 19.
  • the deflection chamber 19 is bounded radially by the jacket 43 and axially by the other end floor 44 and by the fourth intermediate floor 10.
  • the fourth intermediate bottom 10 is here equipped with a perforation 20, whereby the deflection chamber 19 is fluidically connected to an outlet chamber 21, from which an outlet pipe 22 leads out.
  • the outlet tube 22 passes through the fourth intermediate bottom 10 and the other end bottom 44. In this case, the outlet tube 22 may be fixed to the end bottom 44 and the intermediate bottom 10 each with a positive and / or frictional connection 15.
  • the outlet chamber 21 is bounded radially by the casing 43 and axially by the third intermediate bottom 9 and by the fourth intermediate bottom 10.
  • the connecting tube 18 passes through the third intermediate bottom 9 and the fourth intermediate bottom 10 and can be attached thereto by means of a positive and / or non-positive connection 15.
  • a positive and / or non-positive connection 15 For the connection of the inlet pipe 42 with the jacket 43 and for the connection of the outlet tube 22 to the respective end floor 44 may be a welded joint preferred to achieve the required tightness.
  • the flow-through region 14 thus comprises the inlet tube 42, the inlet chamber 17, the connecting tube 18, the deflection chamber 19, the outlet chamber 21 and the outlet tube 22.
  • the resonator tube 13 is fluidly connected to the inlet chamber 17 in that the resonator chamber 12 is acoustically connected to the exhaust-gas-conducting region 14 via the resonator tube 13.
  • the expansion chamber 16 or the absorption chamber 16 may be acoustically connected to the exhaust-carrying region 14 by a perforation, either directly by a perforation formed in the second intermediate bottom 8 or indirectly by a perforation formed in the first intermediate bottom 7 or by a resonator tube 13 within the Expansion chamber 16 and the absorption chamber 16 formed perforation.
  • a perforation either directly by a perforation formed in the second intermediate bottom 8 or indirectly by a perforation formed in the first intermediate bottom 7 or by a resonator tube 13 within the Expansion chamber 16 and the absorption chamber 16 formed perforation.
  • the resonator tube 13 is imperforated inside the expansion chamber 16 or absorption chamber 16 and that the first intermediate bottom 7, which axially limits the resonator chamber 12, is likewise imperforate.
  • the resonator tube 13 is provided in the resonator 12 with an over tube 24 into which an end portion 25 of the resonator tube 13 is inserted axially.
  • the over-tube 24 envelops the end section 25.
  • the over-tube 24 is closed at an end 26 facing away from the first intermediate bottom 7.
  • An inner cross section of the overtube 24 and an outer cross section of the resonator tube 13 in the end portion 25 are matched to one another such that an additional space 27 is formed radially between the overtube 24 and the resonator tube 13.
  • This additional space 27 is fluidically on the one hand with the resonator tube 13 and on the other hand with the resonator 12 acoustically in connection.
  • the resonator tube 13 is fluidically and acoustically connected to the resonator chamber 12 through this intermediate space 27.
  • the overtube 24 in the resonator 12 ends free-standing, so that it has no connection to the resonator tube 13, the show Fig. 2 to 5 preferred embodiments in which the overtube 24 is attached to the resonator tube 13.
  • the overtube 24, however, is attached to the intermediate bottom 7.
  • a positive and / or frictional connection 15 is used for the axial attachment of the resonator tube 13 on the overtube 24 also a positive and / or frictional connection 15 is used.
  • FIG. 2 and 3 is the form and / or frictional connection 15 for attaching the overtube 24 on the resonator tube 13 axially spaced and thus formed separately from the positive and / or frictional connection 15, with which the first intermediate bottom 7 is attached to the resonator tube 13.
  • Fig. 2 is also recognizable that the resonator tube 13 is axially fixedly connected via a further positive and / or frictional connection 15 with the second intermediate bottom 8.
  • the overtube 24 extends axially into the first intermediate bottom 7.
  • the overtube 24 can be fastened to the resonator tube 13 together with this first intermediate bottom 7 by means of a common positive and / or non-positive connection 15.
  • the respective form and / or frictional connection 15 is designed as a rib fixation.
  • a respective annular collar 28, 29, 30 is formed on the respective intermediate bottom 7, 8 and on the over tube 24.
  • the first intermediate bottom 7 shows the annular collar 28.
  • the annular collar 29 is formed.
  • the annular collar 30 is formed.
  • the respective annular collar 28, 29, 30 surrounds the resonator tube 13 in its circumferential direction.
  • the respective rib fixation, which is also referred to below as 15, on the resonator tube 13 comprises two radially outwardly projecting bead-like ribs 31 and 32 and 33, respectively.
  • the ribs 31 are formed axially on both sides of the annular collar 28 of the first intermediate bottom 7.
  • the ribs 32 are arranged axially on either side of the annular collar 29 of the overtube 24.
  • the ribs 33 are arranged axially on either side of the annular collar 30 of the second intermediate bottom 8.
  • the annular collar 28 of the first intermediate bottom 7 and the annular collar 29 of the overtube 24 between the two ribs 31 are arranged.
  • the ribs 31, 32, 33 are matched to the annular collar 28, 29, 30 so that an outer diameter of the respective annular rib 31 is greater than an inner diameter of the respectively associated, thus axially fixed annular collar 28, 29, 30th
  • the ribs 31, 32, 33 are in each case designed as annular ribs which encircle in the circumferential direction of the resonator tube 13.
  • these ribs 31, 32, 33 can also be realized by a plurality of rib segments distributed in the circumferential direction of the resonator tube 13.
  • the ribs 31, 32, 33 can be formed, for example, by means of a plastic forming process on the resonator tube 13, while the annular collar 28, 29, 30 are already pushed onto the resonator tube 13. In this case, at the same time a radial compression between the outside of the resonator tube 13 and an inner side of the respective annular collar 28, 29, 30 take place.
  • the plastic deformation can be realized for example by means of a hydraulic hydroforming process.
  • mechanical forming processes such as, for example, the above-mentioned RidgeLock process of Upland Technologies Inc.
  • annular collar 29 of the overtube 24 is arranged radially between the resonator tube 13 and the annular collar 28 of the intermediate bottom 7.
  • annular collar 28 of the intermediate bottom 4 would have to be angled in the opposite direction.
  • the outer tube 24 is axially closed at its end 26 remote from the first intermediate bottom 7 by the end base 6.
  • said end 35 of the resonator tube 13 axially open.
  • the additional space 27 is fluidly connected on the one hand axially to the resonator tube 13 via a proximal connection 36, while on the other hand it is fluidically connected to the resonator chamber 12 via a distal connection 37.
  • the proximal connection 36 is located in the region of the end 35 of the resonator tube 13, which is arranged within the overtube 24.
  • the distal connection 37 is located on the over tube 24, in a region axially spaced from said end 35 of the resonator tube 13. Expediently, the over-tube 24, apart from the distal connection 37, has no further fluidic connection to the resonator chamber 12.
  • the resonator tube too 13 has no further fluidic connection with the additional space 27 apart from the proximal connection 36.
  • the proximal connection 36 is formed by an axial gap 38 formed axially between the closed end 26 of the overtube 24 and the open end of the resonator tube 35.
  • the proximal connection 36 is formed by a perforation 39 formed on the resonator tube 13.
  • the end 35 of the resonator tube 13 is axially closed.
  • the distal connection 37 is formed by a radial gap 40.
  • the distal connection 37 is formed in each case by a perforation 41 formed in the over-tube 24.
  • the overtube 24 is arranged without contact with the resonator tube 13. While in the example of the Fig. 1 At its end facing the intermediate bottom 7 ends free-standing and thus axially spaced to the intermediate bottom 7, it is in the example of Fig. 6 supported on the intermediate bottom 7, and that radially spaced from the resonator tube 13. Further, in Fig. 6 provided that the intermediate bottom 7 has a U-shaped edge portion 46 which encloses a penetrated by the resonator tube 13 through opening 48 in the circumferential direction. As a result, the peripheral portion 46 also encloses the resonator tube 13 in the circumferential direction.
  • the edge region 46 has in profile a radially inner inner U-leg 45, a radially outer outer U-leg 47 and a U-base 49, which connects the two U-legs 45, 47 with each other.
  • the U-base 49 is facing the gap 27.
  • the inner U-leg 45 forms the above-mentioned annular collar 28 of the intermediate bottom 7.
  • the overtube 24 is axially mounted on the edge region 46 and radially supported on the outer U-leg 47.
  • the edge region 46 axially opposite a recess 50 is formed at the end bottom 44, which forms an annular step 51. On this annular step 51, the overtube 24 is also axially mounted and radially supported thereon.

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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)

Claims (15)

  1. Silencieux pour un système de gaz d'échappement d'un moteur à combustion interne,
    - avec un corps (2), qui comporte une enveloppe (5) s'étendant en direction circonférentielle,
    - avec un résonateur de Helmholtz (11), qui comporte un espace de résonateur (12) non traversé par les gaz d'échappement et un tuyau de résonateur (13),
    - dans lequel l'espace de résonateur (12) est délimité radialement par l'enveloppe (5) et de façon axiale par un fond intermédiaire (7) qui est agencé de façon axiale entre deux extrémités axiales (6) du corps (2),
    - dans lequel le tuyau de résonateur (13) traverse le fond intermédiaire (7),
    caractérisé en ce que
    - le tuyau de résonateur (13) est fixé de façon axiale au fond intermédiaire (7) au moyen d'un assemblage par concordance de forme et/ou en force (15),
    - le tuyau de résonateur (13) dans l'espace de résonateur (12) est équipé d'un sur-tuyau (24) qui enveloppe un tronçon terminal (25) du tuyau de résonateur (13) et qui est fermé à une extrémité (26) éloignée du fond intermédiaire (7),
    - le tuyau de résonateur (13) est relié pour les fluides à l'espace de résonateur (12) à travers un espace intermédiaire (27) réalisé entre le sur-tuyau (24) et le tuyau de résonateur (13).
  2. Silencieux selon la revendication 1, caractérisé en ce que le sur-tuyau (24) est fixé de façon axiale au tuyau de résonateur (13) au moyen d'un assemblage par concordance de forme et/ou en force (15).
  3. Silencieux selon la revendication 1 ou 2, caractérisé en ce que le sur-tuyau (24) pénètre jusque dans le fond intermédiaire (7) et, conjointement à celui-ci, est fixé de façon axiale au tube de résonateur (13) au moyen de l'assemblage par concordance de forme et/ou en force (15).
  4. Silencieux selon la revendication 1, caractérisé en ce que le sur-tuyau (24) est agencé sans contact par rapport au tuyau de résonateur (13) et est appuyé au fond intermédiaire (7) à une certaine distance radiale par rapport audit tuyau de résonateur.
  5. Silencieux selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'assemblage par concordance de forme et/ou en force (15) respectif comporte un collet annulaire (28, 29), qui est réalisé au niveau du fond intermédiaire (7) et/ou du sur-tuyau (24) et qui entoure le tuyau de résonateur (13) en direction circonférentielle, ainsi que deux nervures (31, 32) qui sont réalisées au niveau du tuyau de résonateur (13) et qui sont agencées de façon axiale des deux côtés du collet annulaire (28, 29) respectif afin de fixer de façon axiale le collet annulaire (28, 29) au niveau du tuyau de résonateur (13) et dont le diamètre extérieur est plus grand qu'un diamètre intérieur du collet annulaire (28, 29) respectif.
  6. Silencieux selon les revendications 3 et 5, caractérisé en ce que le collet annulaire (29) du sur-tuyau (24) est agencé radialement entre le tuyau de résonateur (13) et le collet annulaire (28) du fond intermédiaire (7).
  7. Silencieux selon les revendications 4 et 5, caractérisé en ce que
    - le collet annulaire (28) du fond intermédiaire (7) forme une branche en U intérieure (45) d'une zone de bord (46) en forme de U, qui entoure le tuyau de résonateur (13) en direction circonférentielle, du fond intermédiaire (7),
    - le sur-tuyau (24) est appuyé radialement à une branche en U extérieure (47) de cette zone de bord (46).
  8. Silencieux selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le sur-tuyau (24) est fermé de façon axiale au niveau de son extrémité (26) éloignée du fond intermédiaire (7) par le corps (2) ou par un autre fond intermédiaire qui délimite de façon axiale l'espace de résonateur (12).
  9. Silencieux selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le sur-tuyau (24) est fermé de façon axiale au niveau de son extrémité (26) éloignée du fond intermédiaire (7) par un couvercle (34) qui est fixé au sur-tuyau (24).
  10. Silencieux selon l'une quelconque des revendications 1 à 9, caractérisé en ce que l'espace supplémentaire (27) est relié pour les fluides au tuyau de résonateur (13) par l'intermédiaire d'une liaison proximale (36) qui se situe dans la zone d'une extrémité (35) du tuyau de résonateur (13) et il est relié pour les fluides à l'espace de résonateur (12) par l'intermédiaire d'une liaison distale (37) qui est distante de façon axiale de la précédente et qui se situe au niveau du sur-tuyau (24) dans une zone éloignée de l'extrémité (35) du tuyau de résonateur (13).
  11. Silencieux selon la revendication 10, caractérisé en ce que la liaison proximale (36) est formée par une fente (38) entre l'extrémité fermée (26) du sur-tuyau (24) et l'extrémité ouverte (35) du tuyau de résonateur (13).
  12. Silencieux selon la revendication 10, caractérisé en ce que la liaison proximale (36) est formée par une perforation (39) réalisée au niveau du tuyau de résonateur (13), l'extrémité (35) du tuyau de résonateur (13) étant fermée.
  13. Silencieux selon la revendication 12, caractérisé en ce qu'un couvercle commun (34) est prévu pour fermer l'extrémité (35) du tuyau de résonateur (13) et l'extrémité (26) du sur-tuyau (24), lequel couvercle est fixé au niveau du tuyau de résonateur (13) et/ou au niveau du sur-tuyau (24).
  14. Silencieux selon l'une quelconque des revendications 10 à 13, caractérisé en ce que la liaison distale (37) est formée par une perforation (41) réalisée à travers le sur-tuyau (24).
  15. Silencieux selon l'une quelconque des revendications 1 à 14, caractérisé en ce que
    - l'enveloppe (5) du corps (2) est formée par un manteau (43) s'étendant dans la direction circonférentielle, les extrémités axiales (6) du corps (2) étant formées à chaque fois par un fond d'extrémité (44) séparé par rapport au manteau (43), ou
    - l'enveloppe (5) est formée par deux demi-coques qui forment aussi les extrémités axiales (6) du corps (2).
EP16199742.4A 2015-11-30 2016-11-21 Silencieux Active EP3173595B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015223680.3A DE102015223680A1 (de) 2015-11-30 2015-11-30 Schalldämpfer

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EP3173595B1 true EP3173595B1 (fr) 2018-09-05

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11421569B2 (en) 2019-10-18 2022-08-23 Tenneco Automotive Operating Company Inc. Muffler

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11319847B2 (en) * 2018-09-19 2022-05-03 Tenneco Automotive Operating Company Inc. Exhaust device with noise suppression system
RU197501U1 (ru) * 2020-01-31 2020-05-12 Общество с ограниченной ответственностью "Ульяновский автомобильный завод" Глушитель выхлопа

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Publication number Priority date Publication date Assignee Title
JPS54143941U (fr) * 1978-03-30 1979-10-05
JPH0783021A (ja) * 1993-09-17 1995-03-28 Sankei Kogyo Kk 自動車等のマフラ
JP2005256736A (ja) * 2004-03-11 2005-09-22 Calsonic Kansei Corp 自動車用レゾネータ構造
RU81768U1 (ru) * 2008-06-27 2009-03-27 Общество с ограниченной ответственностью "Металлопродукция" Глушитель шума выхлопа двигателя внутреннего сгорания
KR101181007B1 (ko) * 2009-12-02 2012-09-07 현대자동차주식회사 차량용 소음기
US8607923B2 (en) * 2009-12-28 2013-12-17 Toyota Jidosha Kabushiki Kaisha Exhaust apparatus of internal combustion engine
DE102010062049A1 (de) * 2010-11-26 2012-05-31 J. Eberspächer GmbH & Co. KG Schalldämpfer
KR101315266B1 (ko) * 2012-02-24 2013-10-08 세종공업 주식회사 소음기용 테일파이프구조

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11421569B2 (en) 2019-10-18 2022-08-23 Tenneco Automotive Operating Company Inc. Muffler

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RU2016144533A3 (fr) 2018-05-14
RU2654775C2 (ru) 2018-05-22
EP3173595A1 (fr) 2017-05-31
DE102015223680A1 (de) 2017-06-01
RU2016144533A (ru) 2018-05-14
CN107035462A (zh) 2017-08-11
CN107035462B (zh) 2020-01-31

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