EP3032063B1 - Tubulure d'échappement - Google Patents

Tubulure d'échappement Download PDF

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Publication number
EP3032063B1
EP3032063B1 EP15197831.9A EP15197831A EP3032063B1 EP 3032063 B1 EP3032063 B1 EP 3032063B1 EP 15197831 A EP15197831 A EP 15197831A EP 3032063 B1 EP3032063 B1 EP 3032063B1
Authority
EP
European Patent Office
Prior art keywords
tubular body
cavity
attachment
pipe
attachment part
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
EP15197831.9A
Other languages
German (de)
English (en)
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EP3032063A1 (fr
Inventor
Micha HÖRR
Peter Gorke
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication of EP3032063A1 publication Critical patent/EP3032063A1/fr
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Publication of EP3032063B1 publication Critical patent/EP3032063B1/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
    • 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
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
    • 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
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
    • 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
    • F01N1/04—Silencing apparatus characterised by method of silencing by using resonance having sound-absorbing materials in resonance chambers
    • 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
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • 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
    • F01N13/1894—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells the parts being assembled in longitudinal direction
    • 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
    • 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
    • F01N1/026—Annular resonance chambers arranged concentrically to an exhaust passage and communicating with it, e.g. via at least one opening in the exhaust passage
    • 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
    • F01N2310/00—Selection of sound absorbing or insulating material
    • F01N2310/04—Metallic wool, e.g. steel wool, copper wool or the like
    • 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
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/14—Dead or resonance chambers connected to gas flow tube by relatively short side-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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/15—Plurality of resonance or dead chambers
    • 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
    • F01N2490/15—Plurality of resonance or dead chambers
    • F01N2490/155—Plurality of resonance or dead chambers being disposed one after the other in flow direction
    • 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
    • F01N2490/16—Chambers with particular shapes, e.g. spherical

Definitions

  • the present invention relates to an exhaust gas pipe of an exhaust system of an internal combustion engine according to the preamble of claim 1.
  • the invention also relates to an exhaust system, which is equipped with at least one such pipe.
  • An exhaust system which serves to remove combustion exhaust gases from an internal combustion engine, fulfills a number of functions.
  • the most important functions are, on the one hand, the implementation of exhaust gas aftertreatment in order to reduce the pollutant emissions of the internal combustion engine.
  • the exhaust system causes an intensive sound attenuation to reduce the noise emissions of the internal combustion engine.
  • Silencers with a small damping volume can be positioned virtually anywhere along the exhaust system and acoustically connect with a pipe of the exhaust system leading to exhaust gas.
  • a tubular housing of such a silencer can be arranged concentrically to such an exhaust pipe and connected thereto via end-side end floors.
  • a perforation in the exhaust pipe then leads to the acoustic coupling between the exhaust system, ie the interior of the exhaust pipe and a damping chamber formed in the housing, which surrounds the exhaust pipe annular.
  • the problem with such simple mufflers is the different thermal load of the exhaust pipe on the one hand and the tubular housing on the other.
  • the exhaust pipe is exposed to significantly higher temperature fluctuations than the housing, so that the connection points between the housing and the exhaust pipe, which are located at the front end of the housing, high thermal Alternating loads are exposed.
  • the exhaust pipes used in the exhaust system can also contribute to the stability of the exhaust system, for example, if about such an exhaust pipe two relatively heavy components of the exhaust system must be connected to each other.
  • a generic exhaust pipe leading an exhaust system of an internal combustion engine is from the JP 2012-122402 A known. It comprises a tubular body carrying exhaust gas, which has an interior, and a separate attachment with respect to the tubular body, which is laterally attached to the tubular body so that outside of the tubular body is arranged at least partially limited by the fixture cavity extending in the circumferential direction of the tubular body extends over less than 360 °.
  • the cavity is closed to the outside. Furthermore, the cavity is fluidically and / or acoustically connected to the interior.
  • the attachment is attached to two opposite sides of the tubular body to the tubular body, wherein the attachment is fixed on the respective side of the tubular body by means of a welded connection to the tubular body, which extends in the longitudinal extent of the tubular body along the tubular body.
  • Another exhaust pipe leading tube is from the US 2012/0186905 A1 known in which a separate attachment by means of pipe clamps attached to the tubular body is. Further exhaust pipes are out of the US 2011/0186373 A1 , from the JP H05-214930 A and from the EP 0 120 181 A1 known.
  • the present invention is concerned with the problem of providing for an exhaust pipe leading the above type or for an exhaust system equipped therewith an improved embodiment, which is characterized in particular by an additional function.
  • an increased dimensional stability or rigidity is sought for the exhaust pipe.
  • a particularly inexpensive manufacturability of a silencer may be desired.
  • a compact design for the exhaust pipe with muffler function may also be desired.
  • the invention is based on the general idea, the exhaust gas pipe, which is also referred to as the exhaust pipe to equip with a respect to a tubular body of the exhaust pipe separately manufactured attachment, wherein the attachment is externally attached to the tubular body, such that the outside of the tubular body a cavity is formed which is completely or partially delimited by the attachment. Furthermore, the attachment and tube body are coordinated so that the attachment extends in the circumferential direction of the tubular body over less than 360 ° and preferably over 180 ° or less than 180 °. By attaching the attachment to the tubular body, the exhaust pipe is stiffened in the region of the attachment.
  • the attachment is designed or arranged on the tubular body that a cavity in addition to the exhaust gas leading interior of the tubular body is formed, results transversely to the longitudinal direction of the tubular body an increased area moment of inertia, which significantly increases the rigidity of the exhaust pipe.
  • the provision of the cavity also provides the ability to use the cavity as a sound attenuation space, whereby the exhaust pipe can be modified to a silencer.
  • Such a silencer can be realized relatively inexpensively, since essentially only the attachment to the pipe body of the exhaust pipe must be mounted.
  • the arrangement of the attachment to the exhaust pipe also leads to an extremely compact design, so that the exhaust pipe presented here virtually at any point of the exhaust system between the beginning, the is usually formed by an exhaust manifold, and their end, which is usually formed by a tailpipe, realize.
  • the cavity is closed to the outside.
  • the cavity is fluidically and / or acoustically connected to an interior of the tubular body.
  • the cavity is filled with sound-absorbing material.
  • the attachment is attached to two opposite sides of the tubular body on the tubular body.
  • the attachment extends along the longitudinal direction of the tubular body, so that the attachment of the attachment to the tubular body in cross-section of the tubular body takes place on two opposite sides and preferably on two diametrically opposite sides.
  • the direct coupling of the attachment to the tubular body, in particular a good thermal coupling between attachment and tubular body is achieved, so that the temperature difference between the tubular body and fixture is reduced. As a result, also thermally induced stresses between fixture and tubular body are reduced.
  • the attachment is mounted on the respective side of the tubular body by means of a welded connection to the tubular body, which extends in the longitudinal direction of the tubular body along the tubular body. Since the fixation between attachment and tubular body thus takes place along the longitudinal direction of the tubular body, thermally induced expansion differences only lead to comparatively low stresses within the weld, since this is only loaded in its longitudinal direction.
  • An embodiment in which the respective welded connection extends over the entire length of the attachment is advantageous. As a result, the thermal cycling of the respective weld is minimized.
  • the attachment may be a one-piece shell body having a U-shaped cross-section and two legs connected by an arc transverse to a longitudinal extension of the exhaust duct of the tubular body, attached to opposite sides of the tubular body.
  • the design of the attachment as a shell body allows a particularly inexpensive feasibility of the attachment and the exhaust pipe so equipped.
  • the cavity is then limited on the one hand by an inner wall of the attachment and on the other hand by an outer wall of the tubular body.
  • the tubular body is perforated in the region of the attachment.
  • a perforation can in principle be configured in any desired manner, for example by a single wall opening or preferably by a multiplicity, comparatively smaller wall openings.
  • an acoustic coupling of the tube interior with the cavity whereby the cavity can be used as Schalldämpfungsraum.
  • the cavity serves as an expansion chamber or as an absorption chamber.
  • a "genuine" Helmholtz resonator can also be realized if a so-called “neck” containing the oscillatory volume is provided in a suitable manner.
  • a neck of the Helmholtz resonator can be produced by a branch pipe branching off from the pipe body within the attachment, by a corresponding geometry of the attachment, or by an exhibition or excavation of the pipe body during production of a wall opening in the pipe body.
  • a sound attenuation can be realized by means of micro perforation, if the openings of the perforation have an opening cross section of a maximum of 1 mm.
  • the attachment is a manufactured one piece further or other tubular body having a connection side which is shaped complementary to an outer wall of the exhaust gas pipe body, to which the additional tubular body is grown, so that the connection side contacted the outer wall surface. Due to the surface contact between the outside and the outer wall, an intense heat transfer between attachment and tubular body can be realized, which reduces thermally induced stresses due to temperature differences.
  • the cavity is limited at least in the cross section of the exhaust pipe exclusively by an inner side of the attachment. This allows a shaping of the cavity independently of the exhaust gas pipe body.
  • connection side of the attachment part and the outer wall of the exhaust-gas-conducting tubular body are perforated in the region of the contact between connection side and outer wall. This also makes an acoustic coupling created between the interior of the exhaust gas flowed through the tubular body and the non-perfused cavity of the attachment to realize a sound-damping function.
  • the perforations of connection side and outer wall can basically be configured identically. It is also possible to design the perforations differently.
  • the outer wall of the tube may be formed with a perforation formed by a plurality of openings, while the connection side has a perforation formed by a single opening which extends over all the openings of the perforation of the outer wall. Likewise, a reverse design is conceivable.
  • the cavity can be closed in the longitudinal extension of the tubular body at each end by a closure element.
  • a closure at the longitudinal ends of the cavity is especially necessary when the respective cavity is acoustically and ultimately also fluidically coupled to the interior of the tubular body.
  • the respective closure element can basically represent a separate component with respect to the attachment, which is fastened to the attachment in a suitable manner. It is also conceivable to form the respective closure element integrally on the attachment. Furthermore, it is conceivable to fasten the respective closure element to the tubular body. It is also conceivable to form at least one such closure element integrally on the tubular body.
  • the exhaust pipe leading body can basically have any spatial length. For example, it may extend arcuately or rectilinearly.
  • tubular body extends in a straight line or has a rectilinear section
  • at least two such attachment parts on the tubular body which are in the circumferential direction of the tubular body and / or in the longitudinal direction of the tubular body offset from one another are arranged on the tubular body.
  • the space available along the exhaust system can be exploited particularly favorably to provide a stiffening and / or a silencing function by attaching a plurality of such attachments to the respective exhaust pipe.
  • the tubular body may extend curved so that it has a bow.
  • the attachment is then arranged on an inner side of the sheet on the tubular body. In this way, a particularly efficient stiffening of the curved tubular body results in the region of the arc.
  • the attachment can be shaped so that the cavity is closed in the longitudinal extension of the tubular body at each end by the tubular body itself, even if this no additional closure elements are formed on the attachment.
  • the attachment is adapted to the curvature or to the arc of the tubular body, that the cavity is closed on all sides, when the attachment is attached to the tubular body. This measure also simplifies the production of the exhaust pipe presented here with attachment and cavity.
  • the attachment is a one-piece shell body having a U-shaped cross-section with two legs connected via a bow transversely to a longitudinal extent of the tubular body at opposite Side of the tubular body are attached.
  • the two legs are curved in each case at its edge remote from the arc of the shell body according to the arc of the tubular body. Since then also the If necessary, this weld follows this edge, resulting in a significant stiffening of the tubular body in the region of its arc.
  • An exhaust gas system comprises at least one exhaust aftertreatment device, which may be configured, for example, as a catalytic converter or as a particle filter or as a silencer or as any desired combination of such components.
  • the exhaust aftertreatment device or its housing is connected on the inlet side and the outlet side in each case to an exhaust pipe leading piece of pipe.
  • the exhaust system according to the invention is now formed at least in such a piece of pipe through an exhaust pipe of the type described above, which is characterized by an additional function, namely by an increased stiffness and optionally by a silencing function.
  • the exhaust system 1 has a plurality of pipe sections 5, for example, to connect two exhaust aftertreatment devices 2 with each other or to connect the exhaust manifold 3 with such an exhaust aftertreatment device 2.
  • the exhaust aftertreatment devices 2 may be, for example, a catalytic converter 6, a particulate filter 7 and a silencer 8.
  • a housing 35 of the respective exhaust aftertreatment device 2 is connected to such a pipe section 5 on the inlet side and / or outlet side.
  • the tailpipe 4 is directly connected to the silencer 8, the tailpipe 4.
  • the exhaust system 1 is used for discharging combustion exhaust gases from an internal combustion engine 9, which is also equipped for fresh air supply with a fresh air system 10.
  • internal combustion engine 9, exhaust system 1 and fresh air system 10 are arranged in a motor vehicle not shown here.
  • Fig. 1 are two of the pipe sections 5 as the exhaust pipe leading 11, which may also be referred to below as the exhaust pipe 11, designed as follows.
  • such an exhaust pipe 11 comprises a pipe section 15, which serves to guide an exhaust gas flow during operation of the exhaust system 1, and an attachment 12, which is not traversed by exhaust gas during operation of the exhaust system 1, which is a separate component with respect to the tubular body 15 and the the tubular body 15 is grown.
  • a geometry of the attachment 12 and its arrangement on the tubular body 15 are coordinated so that outside of the tubular body 15, a cavity 13 is formed, which is at least partially bounded by the attachment 12.
  • extending the attachment 12 and the cavity 13 in a circumferential direction 14 of the tubular body 15 is not complete, that is less than 360 ° and preferably over 180 ° along the tubular body 15 of the exhaust pipe 11.
  • the tubular body 15 performs the exhaust gas leading function the exhaust pipe 11 and can therefore be referred to as a flow-through or exhaust pipe leading body 15.
  • the attachment 12 is attached to two opposite sides of the tubular body 15 on the tubular body 15.
  • two welds 16 each, which fix the attachment 12 on the tubular body 15.
  • the respective weld 16 which can also be generally referred to as welded joint 16, extends in a longitudinal direction 17 or longitudinal extent 17 of the tubular body 15 along the tubular body 15.
  • the longitudinal direction 17 or the longitudinal extension 17 of the tubular body 15 follows a longitudinal central axis 18 of the tubular body 15, which according to the examples of Fig. 4 and 5a to 5d and 6a to 6d in a straight line or according to the example of Fig. 5e and 6e can be curved.
  • the respective welded connection 16 can extend over the entire length of the attachment 12 in the longitudinal direction 17 along the tubular body 15.
  • the attachment 12 may be a shell body 19, which is made in one piece, so in one piece.
  • the shell body 19 is provided transversely to the longitudinal extent 17 of the tubular body 15 with a substantially U-shaped cross section, in which two legs 20 are connected to each other via a sheet 21.
  • the opposing legs 20 are attached to opposite sides of the tubular body 15.
  • the tubular body 15 perforated in the region of the attachment 12, that is equipped with a perforation 22, which is formed purely by way of example by a plurality of separate openings 23.
  • an inner space 24 of the tubular body 15 is acoustically and ultimately also fluidically coupled to the cavity 13.
  • the cavity 13 is not flowed through by the exhaust gas.
  • the cavity 13 thus serves as a sound damping chamber, for example as an absorption chamber or as a reflection chamber.
  • a sound-absorbing material 25 for example, metal wool or the like.
  • the attachment 12 may be configured instead of a shell body 19 alternatively as a further tubular body 26, which is also suitably made in one piece or in one piece.
  • This further tubular body 26 is not traversed by exhaust gas in contrast to the exhaust-carrying tubular body 15 and has a connection side 27 which is shaped to be complementary to an outer wall 28 of the exhaust-carrying tubular body 15.
  • this complementary connection side 27 of the further tubular body 26 is attached to the outer wall 28 of the exhaust pipe tube body 15, such that the connection side 27 rests flat against the outer wall 28.
  • an intensive heat transfer between the exhaust gas pipe body 15 and the further tubular body 26 of the fixture 12 is achieved.
  • connection side 27 and the outer wall 28 are perforated in the region of the contact between the outer side 27 and the outer wall 28.
  • the exhaust pipe leading body 15 is again provided with a perforation 22 which is formed by a plurality of openings 23.
  • a perforation 29 of the further tubular body 26 is formed purely by way of example by a single opening 30 which covers the entire region of the perforation 22 of the tubular body 15 carrying exhaust gas. It is also conceivable to provide such a window-like opening in the exhaust gas-carrying tubular body 15, while then the further tubular body 26 a Having formed by a plurality of openings perforation.
  • the aforementioned variant is preferred because of the reduced flow resistance. Again, an acoustic and ultimately fluidic coupling between the in the cavity 13 and the interior 24 is created by the perforations 22, 29.
  • Fig. 4 can the cavity 13 in the longitudinal extension 17 of the tube 11 and the exhaust gas pipe body 15 are closed at each of its longitudinal ends or front ends in each case by a closure element 31.
  • a closure element 31 As a result, the shape of the attachment 12.
  • closure elements 31 are basically not required to achieve the desired stiffening of the exhaust pipe body 15 and the exhaust pipe 11.
  • the cavity 13 must be sealed tight on all sides, except for the area of the perforation 22.
  • the two closure elements 31 are designed both as regards the exhaust-carrying tubular body 15 and with respect to the attachment 12 as separate components, which are grown both to the attachment 12 and to the tubular body 15.
  • corresponding welds or welds are not shown here.
  • respective closure elements 31 form integrally on the tubular body 15 or integrally on the attachment 12.
  • the exhaust pipe 11 is generally straight. Its tubular body 15 thus extends straight.
  • two attachments 12 are attached to the tubular body 15.
  • the two attachments 12 in the longitudinal direction 17 of the tubular body 15 are mutually offset on the tubular body 15.
  • a and b of FIGS. 5 and 6 are the two attachments 12 diametrically opposite, that is offset by 180 ° in the circumferential direction 14 to each other on the tubular body 15. This makes it possible in particular to fix the two attachments 12 via common welds 16 on the tubular body 15.
  • FIGS. 5 and 6 are the attachments 12 in the longitudinal direction 17 each sized the same size. In principle, it is also conceivable to dimension the two attachment parts 12 unevenly.
  • the embodiment c of FIGS. 5 and 6 differs from the embodiment b of the FIGS. 5 and 6 in that the two attachments 12 are not exactly diametrically opposed, but are aligned at a different angle from 180 ° to each other. This can be advantageous for adapting the exhaust pipe 11 to special installation situations.
  • the attachments 12 can be attached as explained exclusively for stiffening purposes on the tubular body 15. This stiffening is particularly efficient when, with the help of the attachment 12 said cavity 13 is provided outside the exhaust pipe body 15 leading, as this significantly increases the area moment of inertia of the entire exhaust pipe 11.
  • the embodiment is preferred in which the cavity 13 is used as a sound-damping chamber, so that an acoustic coupling between the interior 24 of the tubular body 15 and the cavity 13 is made.
  • the closure elements 31 may be provided for this purpose. However, these closure elements 31 are in Fig. 6a to d not shown.
  • the exhaust pipe 11 and its tubular body 15 extend curved so that the tubular body 15 has a bow 33.
  • the attachment 12 is now preferably arranged on an inner side 34 of the sheet 33 on the tubular body 15.
  • the curved tube 11 can stiffen particularly efficient.
  • the attachment 12 according to the Fig. 5e and 6e each specifically be shaped so that the cavity 13 is closed at its longitudinal ends in each case by the tubular body 15 directly. This can be realized particularly easily when the attachment 12 is configured as a shell body 19. Separate or additional closure elements 31 can thus be dispensed with.
  • the two legs 20 of the U-shaped shell body 19 each have a distance from the rectilinear arc 21 of the shell body 19 edge along which the weld 16 extends.
  • Said edge has a curvature which corresponds to the curvature of the arc 33 of the tubular body 15, that is, has substantially the same radius of curvature.

Claims (9)

  1. Tuyau de gaz d'échappement (11) d'une installation de gaz d'échappement (1) d'un moteur à combustion interne (9),
    - avec un corps tubulaire de gaz d'échappement (15) qui présente un espace interne (24), et
    - avec au moins une pièce rapportée (12) séparée par rapport au corps tubulaire (15), qui est annexée latéralement au corps tubulaire (15) de sorte que soit agencé à l'extérieur sur le corps tubulaire (15) un espace creux (13) délimité au moins en partie par la pièce rapportée (12), qui s'étend dans la direction périphérique (14) du corps tubulaire (15) sur moins de 360°,
    - dans lequel l'espace creux (13) est fermé vers l'extérieur,
    - dans lequel l'espace creux (13) est relié à l'espace interne (24) au plan fluidique et/ou au plan acoustique,
    - dans lequel la pièce rapportée (12) est fixée sur le corps tubulaire (15) des deux côtés du corps tubulaire (15) opposés l'un à l'autre,
    - dans lequel la pièce rapportée (12) est fixée sur le corps tubulaire (15) du côté respectif du corps tubulaire (15) au moyen d'une liaison soudée (16), qui s'étend dans l'extension longitudinale (17) du corps tubulaire (15) le long du corps tubulaire (15),
    caractérisé en ce que
    - la pièce rapportée (12) est un autre corps tubulaire (26) fabriqué d'un seul tenant, qui présente un côté de raccordement (27) qui est formé de manière complémentaire à une paroi externe (28) du corps tubulaire de gaz d'échappement (15), auquel l'autre corps tubulaire (26) est annexé de sorte que le côté de raccordement (27) et la paroi externe (28) s'appliquent l'un sur l'autre à plat,
    - le côté de raccordement (27) et la paroi externe (28) sont perforés dans la zone du contact entre le côté de raccordement (27) et la paroi externe (28).
  2. Tuyau selon la revendication 1,
    caractérisé en ce que
    l'espace creux (13) est rempli d'un matériau (25) absorbant le son.
  3. Tuyau selon la revendication 1 ou 2,
    caractérisé en ce que
    une perforation (22) du corps tubulaire (15) présente plusieurs ouvertures (23) qui sont voisines l'une de l'autre axialement et/ou dans la direction périphérique (14) du corps tubulaire (15).
  4. Tuyau selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    l'espace creux (13) est fermé par un élément de fermeture (31) dans l'extension longitudinale (17) du corps tubulaire (15) à chaque extrémité.
  5. Tuyau selon la revendication 4,
    caractérisé en ce que
    au moins un tel élément de fermeture (31) est fixé sur le corps tubulaire (15).
  6. Tuyau selon la revendication 4 ou 5,
    caractérisé en ce que
    au moins un tel élément de fermeture (31) est fixé sur la pièce rapportée (12) ou y est formé d'un seul bloc.
  7. Tuyau selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que
    - le corps tubulaire (15) s'étend en ligne droite,
    - au moins deux de telles pièces rapportées (12) sont annexées au corps tubulaire (15), lesquelles parties sont agencées sur le corps tubulaire (15) décalées l'une par rapport à l'autre dans la direction périphérique (14) du corps tubulaire (15) et/ou dans la direction longitudinale (17) du corps tubulaire (15).
  8. Tuyau selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que
    - le corps tubulaire (15) s'étend de manière arquée et présente un arc (33), dans lequel la pièce rapportée (12) est agencée d'un côté interne (34) de l'arc (33) sur le corps tubulaire (15),
    - la pièce rapportée (12) est formée de sorte que l'espace creux (3) soit lui-même fermé dans l'extension longitudinale (17) du corps tubulaire (15) à chaque extrémité par le corps tubulaire (15),
    - la pièce rapportée (12) est un corps de coque (19) fabriquée d'un seul tenant, qui présente transversalement à une extension longitudinale (17) du corps tubulaire (15) une section transversale en forme de U avec deux branches (20) reliées via un arc (21), qui sont fixées aux côtés opposés du corps tubulaire (15),
    - les deux branches (20) sont arquées respectivement sur leur bord éloigné de l'arc (21) du corps de coque (19) correspondant à l'arc (33) du corps tubulaire (15).
  9. Installation de gaz d'échappement d'un moteur à combustion interne (9), qui présente au moins un dispositif de post-traitement de gaz d'échappement (2), qui est raccordé côté entrée et côté sortie respectivement à une pièce tubulaire conduisant un gaz d'échappement (5), dans laquelle au moins une telle pièce tubulaire (5) est formée par un tuyau de gaz d'échappement (11) selon l'une quelconque des revendications précédentes.
EP15197831.9A 2014-12-12 2015-12-03 Tubulure d'échappement Active EP3032063B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014225749.2A DE102014225749B4 (de) 2014-12-12 2014-12-12 Abgas führendes Rohr und Abgasanlage

Publications (2)

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EP3032063A1 EP3032063A1 (fr) 2016-06-15
EP3032063B1 true EP3032063B1 (fr) 2018-06-20

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EP (1) EP3032063B1 (fr)
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CN104995378B (zh) * 2013-02-12 2019-06-25 佛吉亚排放控制技术美国有限公司 具有共振阻尼的车辆排气系统
DE102020100162B4 (de) 2020-01-07 2023-01-12 Umfotec Gmbh Vorrichtung zur Absenkung von Luft- und Körperschall
JP7399023B2 (ja) * 2020-04-27 2023-12-15 株式会社クボタ 作業車のマフラ装置及び作業車

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DE102014225749B4 (de) 2018-03-22
US9644510B2 (en) 2017-05-09
EP3032063A1 (fr) 2016-06-15
US20160169070A1 (en) 2016-06-16
CN105697116B (zh) 2019-11-12
CN105697116A (zh) 2016-06-22
DE102014225749A1 (de) 2016-06-16

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