EP3473823A1 - Sound insulation insert, silencer with same and method for producing a sound insulation insert - Google Patents
Sound insulation insert, silencer with same and method for producing a sound insulation insert Download PDFInfo
- Publication number
- EP3473823A1 EP3473823A1 EP18201009.0A EP18201009A EP3473823A1 EP 3473823 A1 EP3473823 A1 EP 3473823A1 EP 18201009 A EP18201009 A EP 18201009A EP 3473823 A1 EP3473823 A1 EP 3473823A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- muffler
- insert
- plane
- partition wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- 230000003584 silencer Effects 0.000 title claims description 26
- 238000009413 insulation Methods 0.000 title 2
- 238000005192 partition Methods 0.000 claims abstract description 112
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- 238000006243 chemical reaction Methods 0.000 claims 2
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- 238000012545 processing Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
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- 239000003546 flue gas Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- 230000006835 compression Effects 0.000 description 1
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- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- 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
- F01N13/1872—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
-
- 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
- F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
-
- 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
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
- F01N13/1844—Mechanical joints
- F01N13/185—Mechanical joints the connection being realised by deforming housing, tube, baffle, plate, or parts thereof
-
- 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
- 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
- F01N1/08—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
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/18—Exhaust treating devices having provisions not otherwise provided for for improving rigidity, e.g. by wings, ribs
-
- 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
- F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
- F01N2450/20—Methods or apparatus for fitting, inserting or repairing different elements by mechanical joints, e.g. by deforming housing, tube, baffle plate or parts thereof
-
- 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
- F01N2470/06—Tubes being formed by assembly of stamped or otherwise deformed sheet-metal
-
- 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
- F01N2470/14—Plurality of outlet tubes, e.g. in parallel or with different length
-
- 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
- F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
-
- 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
- F01N2490/08—Two or more expansion chambers in series separated by apertured walls only
Definitions
- the present invention relates to an insert for a silencer (hereinafter: silencer insert) of an exhaust system of an internal combustion engine and to a silencer with this silencer insert.
- the invention also relates to a method for producing such a silencer insert.
- an internal combustion engine for example reciprocating engine, rotary piston engine or free-piston engine
- noises are generated as a result of successive operating cycles (in particular suction and compression of a fuel-air mixture, working and expelling the combusted fuel-air mixture).
- These go through as a structure-borne noise the internal combustion engine and are radiated outside of the internal combustion engine as airborne sound.
- the noise as airborne noise, together with the burned fuel-air mixture (hereinafter exhaust gas) pass through an exhaust system in fluid communication with the internal combustion engine. In doing so, flow noises frequently occur in addition to the noises produced by the internal combustion engine.
- the noise passing through the exhaust system is called exhaust noise.
- the exhaust noises which pass through the exhaust system together with the exhaust gas as airborne noise, are reduced by arranged in front of an orifice of the exhaust system muffler, which may be downstream of existing catalysts.
- Such silencers can work, for example, according to the absorption and / or reflection principle.
- resonance absorbers are used which operate on the principle of a Helmholtz resonator.
- mufflers have in common that they have a housing that limits the muffler to the outside. In this way it is also prevented that exhaust gas can leave the exhaust system prematurely.
- a muffler insert is usually arranged inside the housing, which consists for example of at least one partition wall and / or at least one straight or curved line (pipe).
- the interior of the housing in split different chambers, which are flowed through differently and thus realize the sound attenuation. Via the lines inside the muffler, the exhaust gas is conducted within the housing to the individual chambers.
- the housing and the muffler insert are often formed from sheet metal, stainless steel sheet or stainless steel sheet.
- Silencers can be made in different ways: For example, in the EP 2 375 017 B1 and the WO 2006/131165 A1 described winding construction is first formed by bending a sheet and closing the joint (for example, by welding, soldering or flanging) an elongated hollow body with open end faces. Subsequently, a muffler insert is inserted into the hollow body and the end faces of the hollow body are closed (for example, by deep-drawn sheets). In this case, one or both end faces and the peripheral wall of exhaust pipes can be penetrated.
- the housing of the muffler of two (or more) shells is formed, which are connected to each other after inserting the muffler insert (for example by welding, soldering or flanging). It can be formed on the shells connecting pieces for exhaust pipes.
- FIG. 1A a lower shell 101 of the muffler with a muffler insert 110 received from the lower shell 101, an exhaust gas inlet conduit 102 penetrating the lower shell 101, and two exhaust gas outlet conduits 103 and 104 led outwardly between lower shell 101 and upper shell (not shown). Further, the lower shell 101 receives one from the muffler insert 110 separate partition 105.
- the muffler insert 110 is formed of three perforated and profiled partitions 111, 112 and 113.
- the partitions 111, 112 and 113 were first formed separately from sheet material and then welded together.
- two welds 114 are visible, which connect the partitions 111 and 113.
- Embodiments therefore provide a muffler insert that is particularly easy and inexpensive to manufacture, and is particularly robust.
- Embodiments of a muffler insert for a muffler of an exhaust system have a first partition wall, a second partition wall and a connection wall arranged between the first partition wall and the second partition wall.
- the first partition wall defines a first plane
- the second partition wall defines a second plane different from the first plane
- the connecting wall defines a third plane that differs from both the first plane and the second plane.
- the first partition wall and the second partition wall and the connection wall each have a flat circumference (ie, a circumference lying in a plane) defining the respective plane.
- the first partition wall and / or the second partition wall and / or the connecting wall has at least one perforated region.
- each partition has a total of between 100 and 1,000 or between 200 and 900 or between 300 and 800 or between 400 and 600 and in particular 500 holes, which the Define perforated areas.
- the diameter of the holes in the perforated region is between 0.1 mm and 6 mm and in particular between 0.2 mm and 3 mm.
- between 1 and 50 holes or between 2 and 30 holes or between 3 and 20 holes per square centimeter are arranged in the perforated area.
- the connecting wall is integrally formed with both the first partition wall and the second partition wall from a single piece of material.
- the connecting wall and the first and second partition walls are arranged so that the first plane with the second plane forms an angle of at most 60 ° or at most 45 ° or at most 30 °.
- the first level may be parallel to the second level.
- the angle between two planes is equal to the smallest angle between normal vectors on these planes.
- the connecting wall and the first and second partition walls By forming the connecting wall and the first and second partition walls from a single formed piece of material, the manufacturing process is simplified because the number of parts to be handled is reduced. A pre-assembly of the muffler insert by welding several walls can be omitted. Further, there is a (certain) weight saving, since a one-piece trained Schalldämpfer queries weighs less than a formed of several interconnected components muffler insert. Since in a one-piece muffler insert, the connecting wall and the first and second partitions are connected not only at points but over the entire connection area and therefore interconnected, the resulting muffler insert is stiffer than a muffler insert, in which the individual components are only selectively interconnected.
- the third plane with the first and / or second plane encloses an angle of between 20 ° and 90 °. According to one embodiment, the third plane with the first and / or second plane encloses an angle of between 40 ° and 90 °. According to an embodiment closes the third level with the first and / or second level an angle of between 60 ° and 90 °. At such angles, the first and second partition walls can be arranged parallel to each other.
- At least one of the first partition wall, the second partition wall and the connecting wall along its circumference not connected to another wall has an edge portion which is folded over the associated plane by between 70 ° and 110 °.
- at least one of the first partition wall, the second partition wall and the connecting wall along its circumference not connected to another wall has an edge portion which is folded over the associated plane by between 80 ° and 100 °.
- at least one of the first partition wall, the second partition wall and the connecting wall along its circumference not connected to another wall has an edge portion that is folded vertically relative to the associated plane.
- This folded edge portion is formed as a contact surface for a housing of a muffler.
- Such a flip over of the edge region is also referred to as "edge-off”.
- At least one of the first partition wall, the second partition wall and the connecting wall along its circumference not connected to another wall has a coupling portion in which the wall in the circumferential direction has a projection and / or recess formed therewith to engage a coupling portion of a housing of a muffler.
- a sign of the curvature of the circumference of the respective wall in the circumferential direction varies at least twice within a circumferentially circumferentially measured distance of less than 5 cm.
- At least one of the first partition wall, the second partition wall and the connecting wall has at least one raised stiffening region defining a plane parallel to and spaced from the plane defined by the respective wall by at least twice the wall thickness of the respective wall is.
- the respective walls may have plateaus which increase the rigidity of the respective wall.
- the plane defined by the raised stiffening region is at most 100 times the wall thickness or at most 50 times the wall thickness or at most 20 times the wall thickness from the plane defined by the respective wall.
- At least one of the first partition wall, the second partition wall and the connecting wall has at least one passage opening for an exhaust gas line.
- the muffler insert can serve for the storage of exhaust pipes inside a muffler.
- the first and second partition wall and the connecting wall are formed from sheet metal, sheet steel, stainless steel sheet, in particular stainless steel sheet.
- Embodiments of a muffler have, in addition to a housing, a muffler insert received by the housing as described above.
- At least one coupling section in the form of a bead or a projection is introduced into the housing and the coupling section of the housing engages with a coupling section formed on the muffler insert.
- the silencer further comprises at least one exhaust pipe passing through the housing, and the exhaust pipe passes through a passage opening formed in the silencer insert. Then the exhaust pipe have adjacent to the passage opening at least a region in which an (outer) diameter of the exhaust pipe relative to the diameter of the passage opening of the muffler insert is increased, or a wall portion of the exhaust pipe is pressed radially outward, as shown in the WO 2006/131165 A1 is described.
- the exhaust pipe on both sides of the passage opening each having a region in which the outer diameter relative to the diameter of the passage opening is increased or a wall portion of the exhaust pipe is pressed radially outward.
- Embodiments of a method of manufacturing a muffler insert as described above include the following steps: providing a sheet metal strip; Perforating the sheet metal strip to form at least one perforated area; Cutting portions of the sheet metal strip to form mutually spaced pairs of partitions of the muffler insert through each connecting wall; Bending of the partitions of the muffler insert forming portions of the metal strip relative to the connecting wall of the muffler insert forming portion of the metal strip by between 20 ° and 160 ° or between 40 ° and 140 ° or between 60 ° and 120 ° or between 80 ° and 100 °, in particular by 90 ° (this bending can take place in several steps and along two bending edges, furthermore, in order to obtain a desired angle, overbending can take place in order to take account of a resilient property of the sheet metal material); Introducing at least one passage opening for an exhaust gas line into at least one partition wall or connecting wall of the silencer insert; and cutting the connecting wall.
- a one-piece silencer insert can be provided without the necessity of connecting several individual parts together.
- the cutting of the partitions and / or the connecting wall is carried out in several steps, wherein first a rough pre-cutting / free cutting takes place, and then a precise cutting of the desired contour.
- a plurality of muffler inserts are simultaneously formed from a sheet metal strip, and the plurality of muffler inserts remain connected to one another via their connecting walls until a free cutting or trimming of the connecting walls.
- the method additionally comprises the step of: deep drawing the sheet metal strip to form at least one raised stiffening region. Since this step occurs before the sections of the sheet-metal strip forming the partitions of the muffler insert are cut, this step can take place simultaneously for a plurality of muffler inserts to be produced from the sheet-metal strip.
- the method additionally comprises the following step: folding edge sections of the sections of the sheet-metal strip forming the partitions of the silencer insert by between 70 ° and 110 ° or by between 80 ° and 100 °, in particular by 90 ° (this folding can be done in several steps). In this way, the stability of the partition walls forming areas is increased and created a contact surface for a housing of a muffler.
- the method additionally comprises the step of introducing at least one passage opening for an exhaust pipe into the connecting wall of the muffler insert ,
- this at least one passage opening is introduced in a wedge-acting manner, which means that the opening runs in a funnel-shaped or sculpted manner in its edge region. This increases one Contact surface for the exhaust pipe and facilitates passage of the exhaust pipe through the passage opening.
- the method additionally comprises the step of flipping over edge portions of the portion of the metal strip forming the connecting wall of the muffler insert by between 70 ° and 110 ° or between 80 ° and 100 °, in particular by 90 ° , As a result, the rigidity of the connecting wall is increased and increases a contact surface for a housing of a muffler.
- FIG. 2 a formed from stainless steel sheet deep-drawn lower shell 1 of the muffler, which receives a separate partition 5 and a muffler insert 10, which are also formed from deep-drawn stainless steel sheet.
- the separate partition wall 5 and the muffler insert 10 are arranged in recesses, which are embossed in the lower shell 1 of the muffler housing.
- the upper shell of the muffler housing is not shown for the sake of clarity, but corresponds in shape largely mirror-symmetrical to the shape of the lower shell. 1
- the silencer insert 10 passes through an exhaust gas inlet line 2, which also passes through the lower shell 1 of the silencer housing and opens into a space defined between the first partition wall 11, the second partition wall 12 and the connecting wall 13.
- the first and second partition walls 11 and 12 and the connecting wall 13 arranged between the two partition walls 11 and 12 are integrally formed from a stainless steel sheet.
- the first and second partition walls 11 and 12 and the separate partition 5 are further penetrated by two exhaust gas outlet 3 and 4, which are led out of the lower shell 1 and the upper shell of the muffler housing at opposite ends thereof.
- the structure of the muffler insert 10 is particularly good from the FIGS. 3A and 3B seen. It shows the FIG. 3A the muffler insert 10 alone and FIG. 3B the silencer insert 10 with the content held by it exhaust gas inlet line. 2
- the first partition wall 11 defines a first plane E1
- the second partition wall 12 defines a second plane E2
- the connecting wall 13 defines a third plane E3.
- the first and second planes E1 and E2 are in each case perpendicular to the third plane E3 and thus enclose with this an angle of 90 °. Further, the two planes E1 and E2 are oriented parallel to each other in the embodiment shown.
- each of the first and second partitions 11 and 12 and the connecting wall 13 has a plurality of (the partition walls four and the connecting wall two) perforated areas 15. Overall, about 500 holes are introduced into each of the partitions 11 and 12. In the connecting wall 13 8 holes are introduced, however, have a substantially larger diameter than the holes in the partitions 11 and 12th
- first and second partition walls 11 and 12 each have a raised stiffening area 16.
- the connecting wall 13 has two raised stiffening areas 16.
- the raised stiffening areas define planes which in the embodiment shown are five times the wall thickness of the respective wall 11, 12, 13 are spaced from the plane E1, E2 or E3, which is determined by the respective wall 11, 12, 13.
- a through hole 17 is provided for the exhaust gas inlet pipe 2, which is formed so that it has a funnel-shaped cross section and is anittulpt.
- two passage openings for the Abgasauslasstechnischen 3 and 4 are provided, which are each also also formed so that they have a funnel-shaped cross-section and are curattulpt.
- first and second partition wall 11 and 12 and the connecting wall 13 each have edge portions 18, which is folded perpendicular to the plane defined by the respective wall E1, E2 or E3 and
- edge portions 18 which is folded perpendicular to the plane defined by the respective wall E1, E2 or E3 and
- first and second partition wall 11 and 12 in the vicinity of their connection to the connecting wall 13 on two opposite sides each have coupling portions 14 which can engage with corresponding formed on the lower shell 1 and the upper shell of the muffler coupling portions. This will be explained below with reference to the Figures 4, 4A, 4B and 4C explained in more detail.
- FIG. 4A a cut through the FIG. 4 along the section line CC and the FIG. 4C the detail E off FIG. 4A ,
- the lower shell 1 and the upper shell of the muffler each have coupling portions 6 and 7 in the form of protrusions projecting in the direction of the interior of the muffler housing. These projections cooperate with coupling portions 14 in the form of recesses formed on the first and second partition walls 11 and 12, thus preventing movement of the muffler insert 10 toward the exhaust gas inlet duct 2.
- FIG. 4B which cut through the FIG. 4 shows along the section line DD, it can be seen how the exhaust gas inlet pipe 2 can be stored in the through hole 17 of the connecting wall 13.
- the exhaust gas inlet pipe 2 after being threaded through the through hole 17 has been reshaped from the inside so as to have portions 21 on both sides of the through hole 17 in which the outer diameter of the exhaust gas inlet pipe 2 is increased. In this way, an axial movement of the exhaust gas inlet line 2 with respect to the connecting wall 13 can be prevented.
- FIGS. 5A to 5J A method of manufacturing a muffler insert according to the above embodiment is described. Although the described muffler insert has a great similarity to the muffler insert described above, it does not correspond to it completely.
- a provided sheet metal strip in the form of a stainless steel sheet 8 is partially perforated in a first step.
- six superposed muffler inserts are simultaneously formed from the stainless steel sheet 8.
- FIG. 5D dashed lines, along which in the in FIG. 5E shown subsequent step edge portions of the first and second partitions perpendicular be transferred.
- the edge regions of the connecting walls 13 are not yet folded, since the connecting walls 13 of the six muffler inserts are still connected to each other in order to allow common handling of the muffler inserts.
- FIGS. 5F and 5G which views are from the front of the stainless steel sheet 8.
- the raised stiffening portions 16 are visible in the connecting wall 13, whereas the raised stiffening portions in the first and second partition walls 11 and 12 are obscured by the folded edge portions 18.
- the passage openings for the exhaust pipes are introduced into the first and second partitions 11 and 12 and the connecting wall 13.
- FIG. 5H is a view from the left.
- the passage openings 17 are introduced in such a way that the edge area is opened, which facilitates insertion of the exhaust pipes and also increases the contact area with the exhaust pipes.
- FIGS. 5I and 5J only a single muffler insert shown.
- edge regions of the connecting wall 13 are folded vertically relative to the connecting wall 13, as is apparent from the synopsis of FIGS. 5I and 5J results, whereby the connecting wall 13 is stiffened.
- the present invention is not limited thereto.
- the muffler insert also have more than two partitions with pairs of connecting walls arranged therebetween.
- muffler insert has been described above in connection with a (semi-) shell type muffler, the muffler insert may alternatively be used in a coil type muffler.
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Abstract
Ein Schalldämpfereinsatz (10) für einen Schalldämpfer einer Abgasanlage weist eine erste und zweite Trennwand (11, 12) sowie eine zwischen diesen angeordnete Verbindungswand (13) auf. Die erste Trennwand (11) legt eine erste Ebene (E1), die zweite Trennwand (12) legt eine von der ersten Ebene (E1) verschiedene zweite Ebene (E2) und die Verbindungswand (13 legt eine sowohl von der ersten Ebene (E1) als auch der zweiten Ebene (E2) verschiedene dritte Ebene (E3) fest. Wenigstens eine von der ersten Trennwand (11), der zweiten Trennwand (12) und der Verbindungswand (13) weist wenigstens einen perforierten Bereich (15) auf. Dabei ist die Verbindungswand (13) einstückig mit sowohl der ersten Trennwand (11) als auch der zweiten Trennwand (12) gebildet. Weiter schließt die erste Ebene (E1) mit der zweiten Ebene (E2) einen Winkel von höchstens 60° ein, und ist die erste Ebene (E1) insbesondere zu der zweiten Ebene (E2) parallel.A muffler insert (10) for a muffler of an exhaust system has a first and second partition (11, 12) and a connecting wall (13) arranged between them. The first partition (11) defines a first plane (E1), the second partition (12) defines a second plane (E2) different from the first plane (E1), and the connecting wall (13) defines one from both the first plane (E1). At least one of the first partition wall (11), the second partition wall (12) and the connecting wall (13) has at least one perforated area (15) the connecting wall (13) is integrally formed with both the first partition wall (11) and the second partition wall (12) Further, the first plane (E1) with the second plane (E2) forms an angle of at most 60 °, and is first level (E1) in particular to the second level (E2) in parallel.
Ein Schalldämpfer weist ein Gehäuse (1) auf, welches den Schalldämpfereinsatz (10) aufnimmt.A muffler has a housing (1) which receives the muffler insert (10).
Weiter wird ein Verfahren zur Herstellung des Schalldämpfereinsatzes beschrieben. Furthermore, a method for producing the muffler insert will be described.
Description
Die vorliegende Erfindung betrifft einen Einsatz für einen Schalldämpfer (im Folgenden: Schalldämpfereinsatz) einer Abgasanlage einer Verbrennungskraftmaschine sowie einen Schalldämpfer mit diesem Schalldämpfereinsatz. Die Erfindung betrifft außerdem ein Verfahren zum Herstellen eines derartigen Schalldämpfereinsatzes.The present invention relates to an insert for a silencer (hereinafter: silencer insert) of an exhaust system of an internal combustion engine and to a silencer with this silencer insert. The invention also relates to a method for producing such a silencer insert.
Unabhängig von der Bauform einer Verbrennungskraftmaschine (beispielsweise Hubkolbenmotor, Rotationskolbenmotor oder Freikolbenmotor) werden infolge der hintereinander ablaufenden Arbeitstakte (insbesondere Ansaugen und Verdichten eines Kraftstoff-Luftgemischs, Arbeiten und Ausstoßen des verbrannten Kraftstoff-Luftgemischs) Geräusche erzeugt. Diese durchlaufen zum einen als Körperschall die Verbrennungskraftmaschine und werden außen an der Verbrennungskraftmaschine als Luftschall abgestrahlt. Zum anderen durchlaufen die Geräusche als Luftschall zusammen mit dem verbrannten Kraftstoff-Luftgemisch (im folgenden Abgas) eine mit der Verbrennungskraftmaschine in Fluidverbindung stehende Abgasanlage. Dabei treten zu den von der Verbrennungskraftmaschine hervorgerufenen Geräuschen häufig noch Strömungsgeräusche hinzu. Die die Abgasanlage durchlaufenden Geräusche werden Abgasgeräusche genannt.Regardless of the design of an internal combustion engine (for example reciprocating engine, rotary piston engine or free-piston engine) noises are generated as a result of successive operating cycles (in particular suction and compression of a fuel-air mixture, working and expelling the combusted fuel-air mixture). These go through as a structure-borne noise the internal combustion engine and are radiated outside of the internal combustion engine as airborne sound. On the other hand, the noise as airborne noise, together with the burned fuel-air mixture (hereinafter exhaust gas), pass through an exhaust system in fluid communication with the internal combustion engine. In doing so, flow noises frequently occur in addition to the noises produced by the internal combustion engine. The noise passing through the exhaust system is called exhaust noise.
Die Abgasgeräusche, welche die Abgasanlage zusammen mit dem Abgas als Luftschall durchlaufen, werden durch vor einer Mündung der Abgasanlage angeordnete Schalldämpfer reduziert, welche ggf. vorhandenen Katalysatoren nachgeschaltet sind. Derartige Schalldämpfer können beispielsweise nach dem Absorptions- und/oder Reflexionsprinzip arbeiten. Dabei werden unter anderem Resonanzabsorber verwendet, die nach dem Prinzip eines Helmholtz-Resonators arbeiten.The exhaust noises, which pass through the exhaust system together with the exhaust gas as airborne noise, are reduced by arranged in front of an orifice of the exhaust system muffler, which may be downstream of existing catalysts. Such silencers can work, for example, according to the absorption and / or reflection principle. Among other things, resonance absorbers are used which operate on the principle of a Helmholtz resonator.
Allen Arten von Schalldämpfern ist gemeinsam, dass sie ein Gehäuse aufweisen, das den Schalldämpfer nach außen begrenzt. Auf diese Weise wird auch verhindert, dass Abgas die Abgasanlage vorzeitig verlassen kann. Weiter ist im Inneren des Gehäuses in der Regel ein Schalldämpfereinsatz angeordnet, der beispielsweise aus wenigstens einer Trennwand und/oder wenigstens einer geraden oder gekrümmten Leitung (Rohr) besteht. Mittels der Trennwände wird der Innenraum des Gehäuses in unterschiedliche Kammern aufgeteilt, die unterschiedlich durchströmt werden und somit die Schalldämpfung realisieren. Über die Leitungen im Inneren des Schalldämpfers wird das Abgas innerhalb des Gehäuses zu den einzelnen Kammern geleitet.All types of mufflers have in common that they have a housing that limits the muffler to the outside. In this way it is also prevented that exhaust gas can leave the exhaust system prematurely. Further, a muffler insert is usually arranged inside the housing, which consists for example of at least one partition wall and / or at least one straight or curved line (pipe). By means of the partition walls, the interior of the housing in split different chambers, which are flowed through differently and thus realize the sound attenuation. Via the lines inside the muffler, the exhaust gas is conducted within the housing to the individual chambers.
Gebildet werden das Gehäuse und der Schalldämpfereinsatz häufig aus Blech, Edelstahlblech oder nichtrostendem Stahlblech.The housing and the muffler insert are often formed from sheet metal, stainless steel sheet or stainless steel sheet.
Schalldämpfer können auf unterschiedliche Weisen hergestellt werden:
Bei der beispielsweise in der
For example, in the
Bei der beispielsweise in der
Im Folgenden wird der Aufbau eines Schalldämpfers in (Halb-)Schalenbauweise, bei welchem Trennwände auf herkömmliche Weise verbunden sind, unter Bezugnahme auf
Dabei zeigt
Wie besonders gut aus
Bei den vorbekannten Schalldämpfern ist es unabhängig von ihrer Bauweise nachteilig, dass die richtige Positionierung der Trennwände des Schalldämpfereinsatzes aufwendig ist. Eine präzise Positionierung der Trennwände ist erforderlich, da diese häufig nach dem Zusammenbau des Schalldämpfers von Abgasleitungen durchsetzt werden sollen. Zwar werden die Trennwände des Schalldämpfereinsatzes häufig noch vor dem Einbringen in das Gehäuse zur Bildung eines Schalldämpfereinsatzes mittels Rohren und/oder Verstrebungen miteinander verbunden; allerdings wird hierdurch der Arbeitsaufwand nur in eine Vormontage verlagert. Zudem sind die dabei verwendeten Schweißstellen anfällig für Korrosion und insbesondere für interkristalline Korrosion, da die hohen Temperaturen das Gefüge der verwendeten Materialien verändern.In the prior art mufflers, it is disadvantageous regardless of their design that the correct positioning of the partitions of the muffler insert is expensive. A precise positioning of the partitions is required because they are often interspersed with the assembly of the muffler exhaust pipes. Although the partitions of the muffler insert are often still connected to each other before introduction into the housing to form a muffler insert by means of pipes and / or struts; However, this workload is only shifted to a pre-assembly. In addition, the welds used in this case are prone to corrosion and especially for intergranular corrosion, since the high temperatures change the structure of the materials used.
Ausführungsformen stellen daher einen Schalldämpfereinsatz bereit, der besonders einfach und kostengünstig hergestellt werden kann, und besonders robust ist.Embodiments therefore provide a muffler insert that is particularly easy and inexpensive to manufacture, and is particularly robust.
Ausführungsformen eines Schalldämpfereinsatzes für einen Schalldämpfer einer Abgasanlage weisen eine erste Trennwand, eine zweite Trennwand und eine zwischen der ersten Trennwand und der zweiten Trennwand angeordnete Verbindungswand auf. Dabei legt die erste Trennwand eine erste Ebene, die zweite Trennwand eine von der ersten Ebene verschiedene zweite Ebene und die Verbindungswand eine sowohl von der ersten Ebene als auch von der zweiten Ebene verschiedene dritte Ebene fest. Gemäß einer Ausführungsform weisen die erste Trennwand und zweite Trennwand und die Verbindungswand jeweils einen ebenen Umfang (d. h. einen Umfang, der in einer Ebene liegt) auf, welcher die jeweilige Ebene festlegt. Die erste Trennwand und/oder die zweite Trennwand und/oder die Verbindungswand weist wenigstens einen perforierten Bereich auf. Gemäß einer Ausführungsform weist jede Trennwand insgesamt zwischen 100 und 1.000 oder zwischen 200 und 900 oder zwischen 300 und 800 oder zwischen 400 und 600 und insbesondere 500 Löcher auf, welche die perforierten Bereiche festlegen. Gemäß einer weiteren Ausführungsform beträgt der Durchmesser der Löcher im perforierten Bereich zwischen 0,1 mm und 6 mm und insbesondere zwischen 0,2 mm und 3 mm. Gemäß einer Ausführungsform sind im perforierten Bereich zwischen 1 und 50 Löcher oder zwischen 2 und 30 Löcher oder zwischen 3 und 20 Löcher pro Quadratzentimeter angeordnet. Die Verbindungswand ist mit sowohl der ersten Trennwand als auch der zweiten Trennwand einstückig aus einem einzigen Materialstück gebildet. Dabei sind die Verbindungswand und die ersten und zweiten Trennwände so angeordnet, dass die erste Ebene mit der zweiten Ebene einen Winkel von höchstens 60° oder höchstens 45° oder höchstens 30° einschließt. Insbesondere kann die erste Ebene zu der zweiten Ebene parallel sein. Definitionsgemäß ist der Winkel zwischen zwei Ebenen gleich dem kleinsten Winkel zwischen Normalenvektoren auf diese Ebenen.Embodiments of a muffler insert for a muffler of an exhaust system have a first partition wall, a second partition wall and a connection wall arranged between the first partition wall and the second partition wall. In this case, the first partition wall defines a first plane, the second partition wall defines a second plane different from the first plane, and the connecting wall defines a third plane that differs from both the first plane and the second plane. According to an embodiment, the first partition wall and the second partition wall and the connection wall each have a flat circumference (ie, a circumference lying in a plane) defining the respective plane. The first partition wall and / or the second partition wall and / or the connecting wall has at least one perforated region. According to one embodiment, each partition has a total of between 100 and 1,000 or between 200 and 900 or between 300 and 800 or between 400 and 600 and in particular 500 holes, which the Define perforated areas. According to a further embodiment, the diameter of the holes in the perforated region is between 0.1 mm and 6 mm and in particular between 0.2 mm and 3 mm. According to one embodiment, between 1 and 50 holes or between 2 and 30 holes or between 3 and 20 holes per square centimeter are arranged in the perforated area. The connecting wall is integrally formed with both the first partition wall and the second partition wall from a single piece of material. In this case, the connecting wall and the first and second partition walls are arranged so that the first plane with the second plane forms an angle of at most 60 ° or at most 45 ° or at most 30 °. In particular, the first level may be parallel to the second level. By definition, the angle between two planes is equal to the smallest angle between normal vectors on these planes.
Indem die Verbindungswand und die ersten und zweiten Trennwände aus einem einzigen umgeformten Materialstück gebildet sind, wird der Herstellungsprozess vereinfacht, da die Anzahl der zu handhabenden Teile reduziert wird. Eine Vormontage des Schalldämpfereinsatzes durch Verschweißen von mehreren Wänden kann entfallen. Weiter kommt es zu einer (gewissen) Gewichtseinsparung, da ein einstückig ausgebildeter Schalldämpfereinsatz weniger wiegt, als ein aus mehreren miteinander verbundenen Komponenten gebildeter Schalldämpfereinsatz. Da bei einem einstückigen Schalldämpfereinsatz die Verbindungswand und die ersten und zweiten Trennwände nicht nur punktuell sondern über den ganzen Verbindungsbereich zusammenhängen und daher miteinander verbunden sind, ist der erhaltene Schalldämpfereinsatz steifer als ein Schalldämpfereinsatz, bei dem die einzelnen Komponenten nur punktuell miteinander verbunden sind. Weiter ist bei einem einstückigen Schalldämpfereinsatz die Wahrscheinlichkeit des Auftretens einer interkristallinen Korrosion verringert, da es keine Schweißnähte gibt. Schließlich erlaubt es der Verzicht auf Schweißnähte auch, den Schalldämpfereinsatz insgesamt aus günstigeren Legierungen und insbesondere schlecht schweißbaren Legierungen zu fertigen, da keine Schweißbarkeit erforderlich ist.By forming the connecting wall and the first and second partition walls from a single formed piece of material, the manufacturing process is simplified because the number of parts to be handled is reduced. A pre-assembly of the muffler insert by welding several walls can be omitted. Further, there is a (certain) weight saving, since a one-piece trained Schalldämpfereinsatz weighs less than a formed of several interconnected components muffler insert. Since in a one-piece muffler insert, the connecting wall and the first and second partitions are connected not only at points but over the entire connection area and therefore interconnected, the resulting muffler insert is stiffer than a muffler insert, in which the individual components are only selectively interconnected. Further, in a one-piece muffler insert, the likelihood of occurrence of intergranular corrosion is reduced since there are no welds. Finally, dispensing with welds also makes it possible to manufacture the muffler insert as a whole from more favorable alloys and in particular from alloys which are difficult to weld, since no weldability is required.
Gemäß einer Ausführungsform schließt die dritte Ebene mit der ersten und/oder zweiten Ebene einen Winkel von zwischen 20° und 90° ein. Gemäß einer Ausführungsform schließt die dritte Ebene mit der ersten und/oder zweiten Ebene einen Winkel von zwischen 40° und 90° ein. Gemäß einer Ausführungsform schließt die dritte Ebene mit der ersten und/oder zweiten Ebene einen Winkel von zwischen 60° und 90° ein. Bei derartigen Winkeln können die erste und zweite Trennwand parallel zueinander angeordnet werden.According to one embodiment, the third plane with the first and / or second plane encloses an angle of between 20 ° and 90 °. According to one embodiment, the third plane with the first and / or second plane encloses an angle of between 40 ° and 90 °. According to an embodiment closes the third level with the first and / or second level an angle of between 60 ° and 90 °. At such angles, the first and second partition walls can be arranged parallel to each other.
Gemäß einer Ausführungsform weist wenigstens eine von der ersten Trennwand, der zweiten Trennwand und der Verbindungswand entlang ihres nicht mit einer anderen Wand zusammenhängenden Umfangs einen Randabschnitt auf, der gegenüber der zugehörigen Ebene um zwischen 70° und 110° umgelegt ist. Gemäß einer Ausführungsform weist wenigstens eine von der ersten Trennwand, der zweiten Trennwand und der Verbindungswand entlang ihres nicht mit einer anderen Wand zusammenhängenden Umfangs einen Randabschnitt auf, der gegenüber der zugehörigen Ebene um zwischen 80° und 100° umgelegt ist. Gemäß einer Ausführungsform weist wenigstens eine von der ersten Trennwand, der zweiten Trennwand und der Verbindungswand entlang ihres nicht mit einer anderen Wand zusammenhängenden Umfangs einen Randabschnitt auf, der gegenüber der zugehörigen Ebene senkrecht umgelegt ist. Dieser umgelegte Randabschnitt ist als Anlagefläche für ein Gehäuse eines Schalldämpfers ausbildet. Ein derartiges Umlegen des Randbereichs wird auch als "Randabstellen" bezeichnet. Durch diese Maßnahme wird nicht nur die Anlagefläche für ein Gehäuse eines Schalldämpfers vergrößert, sondern auch die Steifigkeit der jeweiligen Wand erheblich erhöht.According to one embodiment, at least one of the first partition wall, the second partition wall and the connecting wall along its circumference not connected to another wall has an edge portion which is folded over the associated plane by between 70 ° and 110 °. According to one embodiment, at least one of the first partition wall, the second partition wall and the connecting wall along its circumference not connected to another wall has an edge portion which is folded over the associated plane by between 80 ° and 100 °. According to one embodiment, at least one of the first partition wall, the second partition wall and the connecting wall along its circumference not connected to another wall has an edge portion that is folded vertically relative to the associated plane. This folded edge portion is formed as a contact surface for a housing of a muffler. Such a flip over of the edge region is also referred to as "edge-off". By this measure, not only the contact surface is increased for a housing of a muffler, but also significantly increases the rigidity of the respective wall.
Gemäß einer Ausführungsform weist wenigstens eine von der ersten Trennwand, der zweiten Trennwand und der Verbindungswand entlang ihres nicht mit einer anderen Wand zusammenhängenden Umfangs einen Kupplungsabschnitt auf, in welchem die Wand in Umgangsrichtung einen Vorsprung und/oder Rücksprung aufweist, der dazu ausgebildet ist, mit einem Kupplungsabschnitt eines Gehäuses eines Schalldämpfers in Eingriff zu kommen. Gemäß einer Ausführungsform ändert sich bei einem Vorsprung oder Rücksprung ein Vorzeichen der Krümmung des Umfangs der jeweiligen Wand in Umfangsrichtung innerhalb einer in Umfangsrichtung entlang des Umfangs gemessenen Strecke von weniger als 5 cm wenigstens zweimal. Mittels dieses Kupplungsabschnitts ist es möglich, den Schalldämpfereinsatz sicher in einem Gehäuse eines Schalldämpfers zu positionieren, ohne dass eine zusätzliche Befestigung durch Verschweißen oder dergleichen erforderlich ist. Zudem dient dieser Kupplungsabschnitt zur Versteifung der ganzen Struktur eines den Schalldämpfereinsatz aufnehmenden Schalldämpfers, so dass Vibrationen eines Gehäuses des Schalldämpfers reduziert werden.According to one embodiment, at least one of the first partition wall, the second partition wall and the connecting wall along its circumference not connected to another wall has a coupling portion in which the wall in the circumferential direction has a projection and / or recess formed therewith to engage a coupling portion of a housing of a muffler. According to an embodiment, in a projection or recess, a sign of the curvature of the circumference of the respective wall in the circumferential direction varies at least twice within a circumferentially circumferentially measured distance of less than 5 cm. By means of this coupling portion, it is possible to safely position the muffler insert in a housing of a muffler, without requiring an additional attachment by welding or the like. In addition, this serves A coupling portion for stiffening the entire structure of a muffler receiving the muffler insert, so that vibrations of a housing of the muffler are reduced.
Gemäß einer Ausführungsform weist wenigstens eine von der ersten Trennwand, der zweiten Trennwand und der Verbindungswand wenigstens einen erhabenen Versteifungsbereich auf, der eine Ebene festlegt, die zu der durch die jeweilige Wand festgelegten Ebene parallel und von dieser um wenigstens die doppelte Wandstärke der jeweiligen Wand beabstandet ist. Auf diese Weise können die jeweiligen Wände Plateaus aufweisen, welche die Steifigkeit der jeweiligen Wand erhöhen. Gemäß einer Ausführungsform ist die von dem erhabenen Versteifungsbereich festgelegte Ebene um höchstens die hundertfache Wandstärke oder höchstens die fünfzigfache Wandstärke oder höchstens die zwanzigfache Wandstärke von der durch die jeweilige Wand festgelegten Ebene beabstandet.According to one embodiment, at least one of the first partition wall, the second partition wall and the connecting wall has at least one raised stiffening region defining a plane parallel to and spaced from the plane defined by the respective wall by at least twice the wall thickness of the respective wall is. In this way, the respective walls may have plateaus which increase the rigidity of the respective wall. According to one embodiment, the plane defined by the raised stiffening region is at most 100 times the wall thickness or at most 50 times the wall thickness or at most 20 times the wall thickness from the plane defined by the respective wall.
Gemäß einer Ausführungsform weist wenigstens eine von der ersten Trennwand, der zweiten Trennwand und der Verbindungswand wenigstens eine Durchgangsöffnung für eine Abgasleitung auf. Auf diese Weise kann der Schalldämpfereinsatz zur Lagerung von Abgasleitungen im Inneren eines Schalldämpfers dienen.According to one embodiment, at least one of the first partition wall, the second partition wall and the connecting wall has at least one passage opening for an exhaust gas line. In this way, the muffler insert can serve for the storage of exhaust pipes inside a muffler.
Gemäß einer Ausführungsform sind die erste und zweite Trennwand sowie die Verbindungswand aus Blech, Stahlblech, Edelstahlblech gebildet, insbesondere nichtrostendem Stahlblech.According to one embodiment, the first and second partition wall and the connecting wall are formed from sheet metal, sheet steel, stainless steel sheet, in particular stainless steel sheet.
Ausführungsformen eines Schalldämpfers weisen neben einem Gehäuse einen von dem Gehäuse aufgenommenen Schalldämpfereinsatz wie vorstehend beschrieben auf.Embodiments of a muffler have, in addition to a housing, a muffler insert received by the housing as described above.
Gemäß einer Ausführungsform ist in das Gehäuse wenigstens ein Kupplungsabschnitt in Form einer Sicke oder eines Vorsprungs eingebracht und steht der Kupplungsabschnitt des Gehäuses mit einem am Schalldämpfereinsatz ausgebildeten Kupplungsabschnitt in Eingriff.According to one embodiment, at least one coupling section in the form of a bead or a projection is introduced into the housing and the coupling section of the housing engages with a coupling section formed on the muffler insert.
Gemäß einer Ausführungsform weist der Schalldämpfer weiter wenigstens eine das Gehäuse durchsetzende Abgasleitung auf, und durchsetzt die Abgasleitung eine im Schalldämpfereinsatz ausgebildete Durchgangsöffnung. Dann kann die Abgasleitung benachbart zur Durchgangsöffnung wenigstens einen Bereich aufweisen, in welchem ein (Außen-)Durchmesser der Abgasleitung gegenüber dem Durchmesser der Durchgangsöffnung des Schalldämpfereinsatzes vergrößert ist, oder ein Wandabschnitt der Abgasleitung radial nach außen gedrückt ist, wie es in der
Ausführungsformen eines Verfahrens zur Herstellung eines Schalldämpfereinsatzes, wie er vorstehend beschrieben ist, weisen die folgenden Schritte auf: Bereitstellen eines Blechstreifens; Perforieren des Blechstreifens, um wenigstens einen perforierten Bereich zu bilden; Zuschneiden von Abschnitten des Blechstreifens, um voneinander durch jeweils eine Verbindungswand beabstandete Paare von Trennwänden des Schalldämpfereinsatzes zu bilden; Biegen der die Trennwände des Schalldämpfereinsatzes bildenden Abschnitte des Blechstreifens gegenüber dem die Verbindungswand des Schalldämpfereinsatzes bildenden Abschnitt des Blechstreifens um zwischen 20° und 160° oder um zwischen 40° und 140° oder um zwischen 60° und 120° oder um zwischen 80° und 100°, insbesondere um 90° (dieses Biegen kann in mehreren Schritten und entlang zweier Biegekanten erfolgen; weiter kann zur Erzielung eines gewünschten Winkels ein Überbiegen erfolgen, um einer federnden Eigenschaft des Blechmaterials Rechnung zu tragen); Einbringen von wenigstens einer Durchgangsöffnung für eine Abgasleitung in wenigstens eine Trennwand oder Verbindungswand des Schalldämpfereinsatzes; und Zuschneiden der Verbindungswand.Embodiments of a method of manufacturing a muffler insert as described above include the following steps: providing a sheet metal strip; Perforating the sheet metal strip to form at least one perforated area; Cutting portions of the sheet metal strip to form mutually spaced pairs of partitions of the muffler insert through each connecting wall; Bending of the partitions of the muffler insert forming portions of the metal strip relative to the connecting wall of the muffler insert forming portion of the metal strip by between 20 ° and 160 ° or between 40 ° and 140 ° or between 60 ° and 120 ° or between 80 ° and 100 °, in particular by 90 ° (this bending can take place in several steps and along two bending edges, furthermore, in order to obtain a desired angle, overbending can take place in order to take account of a resilient property of the sheet metal material); Introducing at least one passage opening for an exhaust gas line into at least one partition wall or connecting wall of the silencer insert; and cutting the connecting wall.
Mit diesem Verfahren kann ein einstückiger Schalldämpfereinsatz bereitgestellt werden, ohne dass es erforderlich ist, mehrere Einzelteile miteinander zu verbinden.With this method, a one-piece silencer insert can be provided without the necessity of connecting several individual parts together.
Gemäß einer Ausführungsform erfolgt das Zuschneiden der Trennwände und/oder der Verbindungswand in mehreren Schritten, wobei zunächst ein grobes Vorschneiden/Freischneiden erfolgt, und anschließend ein präzises Zuschneiden der gewünschten Kontur.According to one embodiment, the cutting of the partitions and / or the connecting wall is carried out in several steps, wherein first a rough pre-cutting / free cutting takes place, and then a precise cutting of the desired contour.
Gemäß einer Ausführungsform werden mehrere Schalldämpfereinsätze gleichzeitig aus einem Blechstreifen gebildet und bleiben die mehreren Schalldämpfereinsätze über ihre Verbindungswände bis zu einem Freischneiden oder Zuschneiden der Verbindungswände miteinander verbunden. Es besteht somit eine Streifenanbindung zwischen den Verbindungswänden der herzustellenden Schalldämpfereinsätze. Durch eine solche Streifenanbindung können die Herstellungskosten reduziert werden, da weniger Teile gehandhabt und positioniert werden müssen.According to one embodiment, a plurality of muffler inserts are simultaneously formed from a sheet metal strip, and the plurality of muffler inserts remain connected to one another via their connecting walls until a free cutting or trimming of the connecting walls. There is thus a strip connection between the connecting walls of the muffler inserts to be produced. By such a strip connection, the manufacturing cost can be reduced because fewer parts must be handled and positioned.
Gemäß einer Ausführungsform weist das Verfahren nach dem Schritt des Bereitstellens des Blechstreifens und vor dem Schritt des Zuschneidens der die Trennwände des Schalldämpfereinsatzes bildenden Abschnitte des Blechstreifens zusätzlich folgenden Schritt auf: Tiefziehen des Blechstreifens um wenigstens einen erhabenen Versteifungsbereich zu formen. Da dieser Schritt vor dem Zuschneiden der die Trennwände des Schalldämpfereinsatzes bildenden Abschnitte des Blechstreifens erfolgt, kann dieser Schritt für eine Mehrzahl von aus dem Blechstreifen herzustellenden Schalldämpfereinsätze gleichzeitig erfolgen.According to one embodiment, after the step of providing the sheet metal strip and before the step of cutting the portions of the sheet metal strip forming the partitions of the silencer insert, the method additionally comprises the step of: deep drawing the sheet metal strip to form at least one raised stiffening region. Since this step occurs before the sections of the sheet-metal strip forming the partitions of the muffler insert are cut, this step can take place simultaneously for a plurality of muffler inserts to be produced from the sheet-metal strip.
Gemäß einer Ausführungsform weist das Verfahren nach dem Schritt des Zuschneidens der die Trennwände des Schalldämpfereinsatzes bildenden Abschnitte des Blechstreifens zusätzlich folgenden Schritt auf: Umlegen von Randabschnitten der die Trennwände des Schalldämpfereinsatzes bildenden Abschnitte des Blechstreifens um zwischen 70° und 110° oder um zwischen 80° und 100°, insbesondere um 90° (dieses Umlegen kann in mehreren Schritten erfolgen). Auf diese Weise wird die Stabilität der die Trennwände bildenden Bereiche erhöht und eine Anlagefläche für ein Gehäuse eines Schalldämpfers geschaffen.According to one embodiment, after the step of cutting the sections of the sheet-metal strip forming the partitions of the silencer insert, the method additionally comprises the following step: folding edge sections of the sections of the sheet-metal strip forming the partitions of the silencer insert by between 70 ° and 110 ° or by between 80 ° and 100 °, in particular by 90 ° (this folding can be done in several steps). In this way, the stability of the partition walls forming areas is increased and created a contact surface for a housing of a muffler.
Gemäß einer Ausführungsform weist das Verfahren nach dem Schritt des Einbringens von wenigstens einer Durchgangsöffnung für eine Abgasleitung in wenigstens eine Trennwand des Schalldämpfereinsatzes und vor dem Schritt des Beschneidens der Verbindungswand zusätzlich den Schritt eines Einbringens von wenigstens einer Durchgangsöffnung für eine Abgasleitung in die Verbindungswand des Schalldämpfereinsatzes auf. Gemäß einer Ausführungsform wird diese wenigstens eine Durchgangsöffnung keilwirkend eingebracht, was bedeutet, dass die Öffnung in ihrem Randbereich trichterförmig oder aufgetulpt verläuft. Dies erhöht eine Anlagefläche für die Abgasleitung und erleichtert ein Hindurchführen der Abgasleitung durch die Durchgangsöffnung.According to one embodiment, after the step of introducing at least one passage for an exhaust pipe into at least one partition wall of the muffler insert and before the step of trimming the connecting wall, the method additionally comprises the step of introducing at least one passage opening for an exhaust pipe into the connecting wall of the muffler insert , According to one embodiment, this at least one passage opening is introduced in a wedge-acting manner, which means that the opening runs in a funnel-shaped or sculpted manner in its edge region. This increases one Contact surface for the exhaust pipe and facilitates passage of the exhaust pipe through the passage opening.
Gemäß einer Ausführungsform weist das Verfahren nach dem Schritt des Zuschneidens der Verbindungswand zusätzlich den Schritt eines Umlegens von Randabschnitten des die Verbindungswand des Schalldämpfereinsatzes bildenden Abschnitts des Blechstreifens um zwischen 70° und 110° oder um zwischen 80° und 100°, insbesondere um 90° auf. Hierdurch wird die Steifigkeit der Verbindungswand erhöht und eine Anlagefläche für ein Gehäuse eines Schalldämpfers vergrößert.According to one embodiment, after the step of trimming the connecting wall, the method additionally comprises the step of flipping over edge portions of the portion of the metal strip forming the connecting wall of the muffler insert by between 70 ° and 110 ° or between 80 ° and 100 °, in particular by 90 ° , As a result, the rigidity of the connecting wall is increased and increases a contact surface for a housing of a muffler.
Ausführungsformen der Erfindung werden nachfolgend anhand von Figuren näher erläutert. Hierbei zeigt
- Figur 1A
- eine perspektivische Ansicht eines herkömmlichen Schalldämpfers in (Halb-)Schalenbauweise, wobei eine Oberschale des Schalldämpfers nicht dargestellt ist;
- Figur 1B
- eine perspektivische Ansicht eines Schalldämpfereinsatzes des Schalldämpfers aus
Figur 1A ; Figur 2- eine perspektivische Ansicht eines Schalldämpfers gemäß einer Ausführungsform, wobei eine Oberschale des Schalldämpfers nicht dargestellt ist;
- Figur 3A
- eine perspektivische Ansicht eines Schalldämpfereinsatzes des Schalldämpfers aus
Figur 2 ; - Figur 3B
- eine perspektivische Ansicht des Schalldämpfereinsatzes aus
Figur 3A mit einer hindurchgeführten Abgaseinlassleitung; Figur 4- eine Seitenansicht des Schalldämpfers aus
Figur 2 ; - Figuren 4A und 4B
- Schnittansichten durch den
Schalldämpfer aus Figur 4 entlang unterschiedlicher Schnittlinien; - Figur 4C
- eine Detailansicht der
Figur 4A ; - Figuren 5A bis 5E
- Aufsichten auf einen Blechstreifen, aus dem gleichzeitig mehrere Schalldämpfereinsätze gebildet werden, wobei die Figuren unterschiedliche Bearbeitungszustände des Blechstreifens zeigen;
- Figuren 5F und 5G
- Ansichten von vorne auf den Blechstreifen, aus dem gleichzeitig mehrere Schalldämpfereinsätze gebildet werden, wobei die Figuren unterschiedliche Bearbeitungszustände des Blechstreifens zeigen;
- Figur 5H
- eine Ansicht von links auf den Blechstreifen, aus dem gleichzeitig mehrere Schalldämpfereinsätze gebildet werden; und
- Figuren 5I und 5J
- Ansichten von hinten auf den Blechstreifen, aus dem gleichzeitig mehrere Schalldämpfereinsätze gebildet werden, wobei die Figuren unterschiedliche Bearbeitungszustände des Blechstreifens zeigen.
- Figure 1A
- a perspective view of a conventional muffler in (half) shell construction, wherein an upper shell of the muffler is not shown;
- FIG. 1B
- a perspective view of a muffler insert of the muffler
Figure 1A ; - FIG. 2
- a perspective view of a muffler according to an embodiment, wherein an upper shell of the muffler is not shown;
- FIG. 3A
- a perspective view of a muffler insert of the muffler
FIG. 2 ; - FIG. 3B
- a perspective view of the muffler insert
FIG. 3A with a guided exhaust gas inlet line; - FIG. 4
- a side view of the muffler
FIG. 2 ; - FIGS. 4A and 4B
- Section views through the muffler
FIG. 4 along different cutting lines; - FIG. 4C
- a detailed view of the
FIG. 4A ; - FIGS. 5A to 5E
- Supervision of a metal strip from the same time several muffler inserts are formed, the figures show different states of processing of the metal strip;
- FIGS. 5F and 5G
- View from the front of the metal strip from the same time several muffler inserts are formed, the figures show different states of processing of the metal strip;
- FIG. 5H
- a view from the left on the metal strip, from which several muffler inserts are formed simultaneously; and
- FIGS. 5I and 5J
- Views from the rear of the metal strip from which several muffler inserts are formed simultaneously, the figures show different states of processing of the metal strip.
Im Folgenden wird unter Bezugnahme auf die
Dabei zeigt
In dem in
Der Aufbau des Schalldämpfereinsatzes 10 ist besonders gut aus den
Wie aus
Wie besonders gut aus
Weiter weisen die ersten und zweiten Trennwände 11 und 12 jeweils einen erhabenen Versteifungsbereich 16 auf. Die Verbindungswand 13 weist zwei erhabene Versteifungsbereiche 16 auf. Die erhabenen Versteifungsbereiche legen dabei jeweils Ebenen fest, die in der gezeigten Ausführungsform um die fünffache Wandstärke der jeweiligen Wand 11, 12, 13 von der Ebene E1, E2 oder E3 beabstandet sind, welche durch die jeweilige Wand 11, 12, 13 festgelegt wird.Furthermore, the first and
In der Verbindungswand 13 ist eine Durchgangsöffnung 17 für die Abgaseinlassleitung 2 vorgesehen, die so ausgebildet ist, dass sie einen trichterförmigen Querschnitt aufweist und aufgetulpt ist. In der ersten und zweiten Trennwand 11 und 12 sind jeweils zwei Durchgangsöffnungen für die Abgasauslassleitungen 3 und 4 vorgesehen, die jeweils ebenfalls so ausgeformt sind, dass sie einen trichterförmigen Querschnitt aufweisen und aufgetulpt sind.In the connecting
An ihrem Umfang, der nicht mit einer anderen Wand in Verbindung steht, weisen die erste und zweite Trennwand 11 und 12 sowie die Verbindungswand 13 jeweils Randabschnitte 18 auf, welche gegenüber der von der jeweiligen Wand festgelegten Ebene E1, E2 oder E3 senkrecht umgelegt ist und somit als Anlagefläche für die Unterschale bzw. die Oberschale des Schalldämpfers zur Verfügung steht, wie es in
Weiter weisen die erste und zweite Trennwand 11 und 12 in der Nähe ihrer Verbindung zur Verbindungswand 13 an zwei gegenüberliegenden Seiten jeweils Kopplungsabschnitte 14 auf, welche mit entsprechenden an der Unterschale 1 und der Oberschale des Schalldämpfers ausgebildeten Kopplungsabschnitten in Eingriff kommen können. Dies wird im Folgenden unter Verweis auf die
Dabei zeigt die
Wie aus
Aus
Im Folgenden wird unter Bezugnahme auf die
Wie in
Anschließend werden die Bereiche des Edelstahlblechs 8, welche die ersten und zweiten Trennwände des Schalldämpfereinsatzes bilden, frei geschnitten. Die entsprechenden Schnittkanten 81 sind in
Anschließend werden durch Tiefziehen des Edelstahlblechs 8 erhabene Versteifungsbereiche 16 eingeprägt, die schematisch in
Danach erfolgt in dem in
Dabei zeigt
Zuvor werden jedoch die ersten und zweiten Trennwände 11 und 12 in mehreren Schritten gegenüber der Verbindungswand 13 so umgebogen, dass sie zu der Verbindungswand 13 jeweils senkrecht stehen. Dies ist in den
Anschließend werden in die ersten und zweiten Trennwände 11 und 12 sowie die Verbindungswand 13 die Durchgangsöffnungen für die Abgasleitungen eingebracht. Dies ist schematisch in der
Anschließend werden auch die Verbindungswände 13 zugeschnitten und die Schalldämpfereinsätze so voneinander getrennt. Aus diesem Grund ist in
Auch wenn vorstehend ein Schalldämpfereinsatz mit zwei Trennwänden und einer Verbindungswand beschrieben worden ist, ist die vorliegende Erfindung hierauf nicht beschränkt. Beispielsweise kann der Schalldämpfereinsatz auch mehr als zwei Trennwände mit paarweise dazwischen angeordneten Verbindungswänden aufweisen.Although a muffler insert having two partition walls and a connecting wall has been described above, the present invention is not limited thereto. For example, the muffler insert also have more than two partitions with pairs of connecting walls arranged therebetween.
Auch wenn vorstehend ein Schalldämpfereinsatz in Verbindung mit einem Schalldämpfer in (Halb-)Schalenbauweise beschrieben worden ist, kann der Schalldämpfereinsatz alternativ auch in einem Schalldämpfer in Wickelbauweise verwendet werden.Although a muffler insert has been described above in connection with a (semi-) shell type muffler, the muffler insert may alternatively be used in a coil type muffler.
- 11
- Unterschale eines SchalldämpfergehäusesLower shell of a silencer housing
- 22
- AbgaseinlassleitungExhaust gas inlet pipe
- 2121
- Abschnitte der Abgaseinlassleitung mit vergrößertem AußendurchmesserSections of the exhaust gas inlet line with enlarged outer diameter
- 33
- Abgasauslassleitungflue gas outlet conduit
- 44
- Abgasauslassleitungflue gas outlet conduit
- 55
- separate Trennwandseparate partition
- 66
- Kupplungsabschnitt in der Unterschale des SchalldämpfergehäusesCoupling section in the lower shell of the muffler housing
- 77
- Kupplungsabschnitt in der Oberschale des SchalldämpfergehäusesCoupling section in the upper shell of the silencer housing
- 88th
- Blechstreifenmetal strip
- 1010
- Schalldämpfereinsatzmuffler insert
- 1111
- erste Trennwandfirst partition
- 1212
- zweite Trennwandsecond partition
- 1313
- Verbindungswandconnecting wall
- 1414
- Kupplungsabschnitt des SchalldämpfereinsatzesCoupling section of the muffler insert
- 1515
- perforierter Bereichperforated area
- 1616
- erhabener Versteifungsbereichraised stiffening area
- 1717
- Durchgangsöffnung für eine AbgasleitungThrough opening for an exhaust pipe
- 1818
- umgelegter Randabschnittfolded edge section
- 8181
- Schnittkantencut edges
- E1E1
- erste Ebenefirst floor
- E2E2
- zweite Ebenesecond level
- E3E3
- dritte EbeneThird level
Claims (14)
wobei in das Gehäuse (1) wenigstens ein Kupplungsabschnitt (6) in Form einer Sicke oder eines Vorsprungs eingebracht ist, und
wobei der Kupplungsabschnitt (6) des Gehäuses mit dem Kupplungsabschnitt (14) des Schalldämpfereinsatzes (10) nach Anspruch 4 in Eingriff steht.Silencer according to claim 7,
wherein in the housing (1) at least one coupling portion (6) is introduced in the form of a bead or a projection, and
wherein the coupling portion (6) of the housing with the coupling portion (14) of the muffler insert (10) according to claim 4 is engaged.
weiter aufweisend wenigstens eine das Gehäuse (1) durchsetzende Abgasleitung, wobei die Abgasleitung (2, 3, 4) die Durchgangsöffnung (17) des Schalldämpfereinsatzes (10) nach Anspruch 6 durchsetzt und benachbart zur Durchgangsöffnung (17) wenigstens einen Bereich aufweist, in welchem ein Durchmesser der Abgasleitung (2, 3, 4) gegenüber dem Durchmesser der Durchgangsöffnung (17) des Schalldämpfereinsatzes (10) vergrößert ist, oder ein Wandabschnitt der Abgasleitung (2, 3, 4) radial nach außen gedrückt ist.Silencer according to claim 7 or 8,
further comprising at least one the housing (1) passing through the exhaust pipe, wherein the exhaust pipe (2, 3, 4) passes through the through hole (17) of the muffler insert (10) according to claim 6 and adjacent to the passage opening (17) has at least one region in which a diameter of the exhaust pipe (2, 3, 4) relative to the diameter of Through opening (17) of the muffler insert (10) is increased, or a wall portion of the exhaust pipe (2, 3, 4) is pressed radially outward.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017124750.5A DE102017124750A1 (en) | 2017-10-23 | 2017-10-23 | Muffler insert, muffler with this and method of making a muffler insert |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3473823A1 true EP3473823A1 (en) | 2019-04-24 |
EP3473823B1 EP3473823B1 (en) | 2020-01-08 |
Family
ID=63878554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18201009.0A Active EP3473823B1 (en) | 2017-10-23 | 2018-10-17 | Silencer with sound insulation insert and method for producing a silencer with sound insulation insert |
Country Status (4)
Country | Link |
---|---|
US (1) | US11248513B2 (en) |
EP (1) | EP3473823B1 (en) |
CN (1) | CN109695491B (en) |
DE (1) | DE102017124750A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4343123A1 (en) * | 2022-09-26 | 2024-03-27 | Purem GmbH | Silencer |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6822985B2 (en) * | 2018-01-05 | 2021-01-27 | フタバ産業株式会社 | Silencer |
DE102020109817A1 (en) * | 2020-04-08 | 2021-10-14 | Purem GmbH | Insert assembly for a muffler of an exhaust system of an internal combustion engine |
RU202977U1 (en) * | 2020-07-14 | 2021-03-17 | Публичное акционерное общество "КАМАЗ" | Exhaust silencer for internal combustion engine |
DE102021115392A1 (en) * | 2021-06-15 | 2022-12-15 | Purem GmbH | Silencer for an exhaust system of an internal combustion engine |
DE102021115962A1 (en) * | 2021-06-21 | 2022-12-22 | Purem GmbH | Muffler and method of making a muffler |
DE102021132303A1 (en) | 2021-12-08 | 2023-06-15 | Faurecia Emissions Control Technologies, Germany Gmbh | Method of manufacturing a housing for an exhaust system component and housing |
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-
2017
- 2017-10-23 DE DE102017124750.5A patent/DE102017124750A1/en not_active Withdrawn
-
2018
- 2018-10-17 EP EP18201009.0A patent/EP3473823B1/en active Active
- 2018-10-22 US US16/166,566 patent/US11248513B2/en active Active
- 2018-10-23 CN CN201811239430.3A patent/CN109695491B/en active Active
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DE10060522A1 (en) * | 2000-12-06 | 2002-06-27 | Eberspaecher J Gmbh & Co | Exhaust silencer for a fuel-operated heater |
DE102009053429A1 (en) * | 2009-11-17 | 2011-09-15 | Heinrich Gillet Gmbh | silencer |
EP2375017A2 (en) * | 2010-04-10 | 2011-10-12 | Bayerische Motoren Werke Aktiengesellschaft | Method for manufacturing an automobile muffler and automobile muffler |
DE112014003814T5 (en) * | 2013-08-20 | 2016-05-04 | Tenneco Automotive Operating Company Inc. | Adapted silencer |
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Also Published As
Publication number | Publication date |
---|---|
DE102017124750A1 (en) | 2019-04-25 |
US20190120115A1 (en) | 2019-04-25 |
US11248513B2 (en) | 2022-02-15 |
EP3473823B1 (en) | 2020-01-08 |
CN109695491B (en) | 2021-08-24 |
CN109695491A (en) | 2019-04-30 |
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