Muffler for exhaust gas system of internal combustion engine and exhaust gas system for internal combustion engine
By setting up balanced partition walls and long hole-shaped balanced pipe openings in the muffler of the exhaust gas equipment of the internal combustion engine, the problems of installation complexity and positioning difficulties are solved, simplified installation and precise positioning are achieved, and mechanical stability and heat resistance are improved.
Patent Information
- Application Number
- CN202411397136.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-10-09
- Filing Date
- 2024-10-09
- Publication Date
- 2025-04-11
AI Technical Summary
There are complexity and difficulty in positioning during the installation process of the existing internal combustion engine exhaust equipment mufflers.
By providing a balanced partition wall and an elongated hole-shaped balanced tube opening inside the muffler, the exhaust pipe is allowed to pass through the balanced partition wall at different locations, avoiding over-positioning, and achieving precise positioning of other components.
The installation process of exhaust gas equipment is simplified, further processing measures are avoided, such as separation of protruding pipe sections, and improved mechanical stability and heat resistance.
Smart Images
Figure CN119801707A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a muffler for an exhaust gas system of an internal combustion engine and an exhaust gas system for an internal combustion engine. Background Art
[0002] Such a silencer usually has a silencer housing, which has a peripheral wall extending in the direction of the longitudinal axis of the silencer and surrounding the longitudinal axis of the silencer and surrounding the internal space of the silencer radially outward, and has end walls axially delimiting the internal space of the silencer at the two axial end regions of the peripheral wall. The peripheral wall can be constructed as a tube body formed, for example, by winding a metal sheet, and end walls constructed as separate metal sheets can be installed on the two axial ends of the tube body. In an alternative design, the silencer housing can be composed of two housing covers, for example, each housing cover forming a part of the peripheral wall and a part of each end wall.
[0003] In order to divide the interior of the muffler into different chambers that contribute to the soundproofing, one or more partition walls are provided in the interior of the muffler, which are usually supported on the peripheral wall in the peripheral area thereof. In addition, one or more exhaust gas pipes are provided in the interior of the muffler, which pass through one or more partition walls of this type in the area of the corresponding pipe openings. In order to introduce exhaust gas into the interior of the muffler or to discharge exhaust gas from the interior of the muffler, at least one exhaust gas pipe can pass through a pipe opening formed in the peripheral wall or / and at least one exhaust gas pipe can pass through a pipe opening formed in the end wall. Summary of the invention
[0004] The object of the present invention is to provide a silencer for an exhaust system of an internal combustion engine, the structure of which allows simplified assembly.
[0005] According to the present invention, this object is achieved by a muffler for an exhaust gas device of an internal combustion engine, the muffler comprising a muffler shell having a circumferential wall surrounding an interior space of the muffler, at least one balancing partition wall arranged in the interior space of the muffler, and at least one exhaust pipe, the exhaust pipe passing through the balancing partition wall in the area of a balancing pipe opening constructed in at least one balancing partition wall, wherein the balancing pipe opening has a balancing opening internal dimension in at least one balancing opening longitudinal direction orthogonal to the opening center axis of the balancing pipe opening, and the exhaust pipe passing through the balancing pipe opening has a pipe external dimension in the longitudinal direction of the balancing opening, wherein the balancing opening internal dimension is greater than the pipe external dimension in the longitudinal direction of the balancing opening.
[0006] By providing such a balancing pipe opening for accommodating an exhaust pipe, the exhaust pipe passing through such a balancing pipe opening can be arranged at different positions in the longitudinal direction of the balancing opening with respect to the balancing partition. This avoids overdetermination when positioning such an exhaust pipe when the exhaust pipe also passes through other components of the muffler, such as other partitions and / or end walls or peripheral walls. On the other hand, the variation permitted during assembly in the positioning of the exhaust pipe in relation to the balancing partition enables precise positioning relative to other components passed through by the exhaust pipe, such as peripheral walls or end walls. This precise positioning that can be achieved during assembly of these components can in turn help avoid further processing measures, such as separating protruding pipe sections.
[0007] For a simple to implement design, the exhaust gas pipe can have an approximately circular outer circumferential contour.
[0008] In order to assist the variable positioning of the exhaust pipe in the region of the balancing pipe opening, it is proposed that the balancing pipe opening is configured in the form of an elongated hole, wherein the balancing pipe opening is delimited in the exhaust pipe receiving section by an opening edge section of the balancing partition extending approximately in a straight line approximately parallel to the longitudinal direction of the balancing opening. In the extension region of the exhaust pipe receiving section, the exhaust pipe can be positioned approximately freely without any jamming occurring between the two opening edge sections.
[0009] In order to achieve a stable structure, the balancing pipe opening may have a transverse dimension approximately perpendicular to the longitudinal direction of the balancing opening at least within the balancing length range of the balancing pipe opening that is approximately equal to the outer dimension of the exhaust pipe that is perpendicular to the longitudinal direction of the balancing opening.
[0010] For this purpose, it can be provided, for example, that a distance of the opening edge section approximately transversely to the longitudinal direction of the compensating opening is approximately equal to an outer dimension of the tube orthogonal to the longitudinal direction of the compensating opening.
[0011] Furthermore, a stable construction can be supported by the exhaust gas pipe being fixedly connected to the compensating partition wall in at least one fastening region which is spaced apart from the pipe longitudinal axis orthogonally to the longitudinal direction of the compensating opening.
[0012] For a mechanically stable and temperature-resistant design, the exhaust gas pipe can be connected to the compensating intermediate wall in at least one fastening region by material bonding, preferably welding.
[0013] Furthermore, for a stable configuration, provision can be made for the exhaust gas pipe to be fixedly connected to the compensating partition wall in at least one fastening region in the region of one of the opening edge sections.
[0014] The balancing partition wall can be configured as a sheet metal profile, and the balancing pipe opening can be surrounded by a flange formed in the balancing partition wall. Through the flange, an opening edge section can also be provided in the exhaust gas pipe receiving section of the balancing pipe opening.
[0015] In order to introduce exhaust gas into the interior space of the muffler or to discharge it from the interior space of the muffler, at least one exhaust gas pipe passing through the balancing pipe opening can be constructed as an angled pipe, which has a first pipe section extending in the direction of a first pipe longitudinal axis section passing through the balancing pipe opening and a second pipe section extending in the direction of a second pipe longitudinal axis section embedded in the pipe opening of the peripheral wall. In order to achieve, in particular in the region of the second pipe section (in which the second pipe section passes through the peripheral wall or is embedded in the pipe opening in the peripheral wall), that the pipe section ends flush with the peripheral wall, for example, it can be further provided that the longitudinal direction of the balancing opening and the second pipe longitudinal axis section are in one plane or / and are approximately parallel to each other.
[0016] Such an exhaust gas pipe can be provided as an approximately right-angled angle pipe when the first pipe longitudinal axis section and the second pipe longitudinal axis section are approximately orthogonal to one another.
[0017] In order to achieve defined sound-absorbing characteristics, it is proposed that at least two partition walls arranged one after another in the direction of the longitudinal axis of the muffler are provided in the interior space of the muffler, at least one exhaust gas pipe passes through at least two partition walls in the area of the corresponding pipe opening, and at least one, preferably each of the partition walls is a balancing partition wall.
[0018] In order to also facilitate a sound-damping connection between chambers separated by the equalizing partition walls, at least one, preferably a plurality of connecting openings can be formed in at least one, preferably each, equalizing partition wall.
[0019] The invention also relates to an exhaust system for an internal combustion engine, comprising at least one silencer designed according to the invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The present invention is described in detail below with reference to the accompanying drawings.
[0021] Figure 1 A perspective view of a muffler is shown with a partially opened housing;
[0022] Figure 2 Show Figure 1 The partition wall of the muffler;
[0023] Figure 3 Shows when the partition wall is constructed as a balanced partition wall Figure 2 Detailed view of the bulkhead;
[0024] Figure 4 Show Figure 1Principle partial longitudinal section of a silencer having a partition wall designed as a balancing partition wall. DETAILED DESCRIPTION
[0025] exist Figure 1 In the present invention, a silencer for an exhaust system of an internal combustion engine is generally indicated by 10. The silencer 10 comprises a silencer housing 12 which has a plurality of outer shells, for example formed by winding a sheet metal element and having a plurality of outer shells. Figure 1 The peripheral wall 14, which is only partially shown, and the two peripheral walls 14 along the longitudinal axis S of the muffler L The axial end regions 16, 18 are arranged spaced apart from each other and each has an end wall 20, 22. The peripheral wall 14 and the end walls 20, 22 delimit a silencer interior 24 through which the exhaust gas can flow.
[0026] In the embodiment shown, five partition walls 26 are arranged in the silencer interior 24. 1 , 26 2 , 26 3 , 26 4 , 26 5 . Next door 26 1 , 26 2 , 26 3 , 26 4 , 26 5 The circumferential walls 14 are supported in the respective peripheral region on the inner side and form between themselves and also in conjunction with the end walls 20 , 22 the respective chambers 28 of the muffler 10 . 1 , 28 2 , 28 3 , 28 4 , 28 5 , 28 6 .
[0027] A plurality of exhaust gas pipes, generally designated 30 and also only partially shown, extend within the interior of the muffler 10. The exhaust gas pipes 30 serve to introduce the exhaust gas from the internal combustion engine into the muffler 10 or its interior 24, leading through the various chambers 28. 1 , 28 2 , 28 3 , 28 4 , 28 5 , 28 6 and is discharged again from the muffler 10. For example, the exhaust pipe 30 may pass through the peripheral wall 14 and / or the exhaust pipe 30 may pass through one or more partition walls 26. 1 , 26 2 , 26 3 , 26 4 , 26 5 and one or two end walls 20 , 22 .
[0028] It should be pointed out here that Figure 1 The silencer 10 is shown merely by way of example. Of course, different configurations can be provided with regard to the number and positioning of the partition walls and the exhaust gas pipes in the silencer interior 24.
[0029] Figure 2 For example, according to the partition wall 26 2 An example of the design of such a partition wall is shown. 2 It is designed as a sheet metal molded part and has a substantially plate-shaped portion with respect to the longitudinal axis S of the muffler. L The main body 32 is oriented approximately orthogonally. In the peripheral region, an edge region 34 formed by crimping is connected to the main body 32, with which the partition wall 26 2 Abutting against the inner surface of the peripheral wall 14. For example, with the partition wall 26 2 Accordingly, the peripheral wall 14 can have a depression extending around the circumference, in which the edge region 34 is received for a defined retention of the partition wall 26. 2 .
[0030] In order to achieve the above mentioned 2 Two chambers 28 separated from each other 2 , 28 3 The connection between the two, which helps to eliminate noise, can be made in the partition wall 26 2 A plurality of connection openings 36 are provided in the main body 32. In addition, 2 The exhaust gas pipes 30 are respectively provided with pipe openings 38, 40. The pipe openings 38, 40 can be designed as flanges, so that the partition wall 26 is formed in the region of each of the pipe openings 38, 40. 2 The exhaust gas pipe 30 passing through the corresponding pipe opening 38, 40 can be fixed to such an opening edge section by welding, for example.
[0031] Although the basic structure of this muffler has been described above, Figure 3 and Figure 4 To illustrate the above reference Figure 2 Detailed description of the partition wall 26 2 It should also be emphasized here that the following description will be combined with the partition wall 26. 2 The design aspects described for the tube opening 38 may also be implemented in all or some of the other partition walls 26. 1 , 26 3 , 26 4 , 26 5 or in all or only some of the partition walls 261 , 26 2 , 26 3 , 26 4 , 26 5 This is achieved in the tube opening in the.
[0032] exist Figure 3 The middle joint pipe opening 38 is shown, which is different from the Figure 2 The pipe opening has a substantially circular cross-sectional geometry that is adapted to the outer contour of the exhaust pipe 30 passing through the outer contour, as can be seen in FIG. 3 . With this configuration, the pipe opening 38 forms a balancing pipe opening 42 that is oriented in the longitudinal direction R of the balancing opening. A The internal dimension of the balance opening I L Greater than the balance pipe opening 42 transverse to the balance opening longitudinal direction R A The horizontal dimension of the opening I Q Not only the longitudinal dimension I of the balance opening of the balance pipe opening 42 L And there is also the horizontal dimension of the opening I Q are orthogonal to Figure 4 The visible opening center axis M O observe.
[0033] The balancing pipe opening 42 or the partition wall 26 which in this embodiment provides the balancing partition wall 44 2 The shaping is carried out in such a way that, on the bead 46 surrounding the balancing pipe opening 42, opening edge sections 48, 50 are formed which extend in the balancing opening longitudinal direction R A The opening edge sections 48, 50 extend approximately straight and parallel to each other. Therefore, the opening edge sections 48, 50 form an exhaust pipe receiving section 53. The exhaust pipe 30 can be received in the exhaust pipe receiving section 53, and the exhaust pipe has a longitudinal direction R perpendicular to the equilibrium opening. A External dimensions of the tube A Q Roughly equal to the horizontal dimension I of the opening Q Thus, the exhaust pipe 30 is transverse to the longitudinal direction R of the equilibrium opening. A It is accommodated in the balancing pipe opening 42 substantially without play, but can be moved in the longitudinal direction R of the balancing opening. A The balancing pipe opening 42 may be arranged at any position along the opening edge sections 48, 50. For example, the geometric structure of the balancing pipe opening 42 may be such that when the exhaust gas pipe 30 is in the balancing opening longitudinal direction R A When the exhaust pipe 30 is positioned in an end region of the two opening edge sections 48, 50, the exhaust pipe 30 also rests on the corresponding arc-shaped connecting regions 52, 54 of the bead 46 which also provides the opening edge sections 48, 50. For this purpose, the radius of curvature of these arc-shaped connecting regions 52, 54 can be approximately equal to the radius of curvature of the outer circumference of the exhaust pipe 30.
[0034] Figure 4 The region of the silencer 10 is shown in which the exhaust gas pipe 30 designed as an angled pipe passes through the partition wall 26 designed as a compensating partition wall 48. 2 The exhaust pipe 30 has a substantially longitudinal axis L R The first pipe section 56 extends in the direction of the pipe longitudinal axis L. R Approximately parallel to, and possibly also coaxial with, the opening center axis M of the balancing pipe opening 42 O Positioning. At the same time, the longitudinal axis L R The first tube longitudinal axis section L of the first tube section 56 is also formed R1 .
[0035] The exhaust gas pipe 30 further comprises a second pipe section 58 which extends in a second pipe longitudinal axis section L. R2 The two tube longitudinal axis sections L R1 and L R2 The exhaust gas pipe 30 , which is designed approximately orthogonally to one another, such that it is designed as an angled pipe, forms a right-angle transition between the two pipe sections 56 , 58 .
[0036] The second pipe section 58 engages in a pipe opening 62 of the circumferential wall 14, which is formed in the circumferential wall 14 in the region of the bead 60, for example. A Since the second tube section 58 can be variably positioned in the compensation partition 42, there is the possibility of positioning the second tube section 58 in such a way that it ends flush with the peripheral wall 14 or the bead 60 formed thereon and can be connected there to the peripheral wall 14, for example, by a weld seam, or protrudes slightly beyond the bead 60 to a defined extent, so that a welded connection to the peripheral wall 14 can then be achieved in this protruding region. No further post-processing measures are then required to separate the excessively protruding end section of the second tube section 58.
[0037] For a stable structure, the exhaust pipe 30 can then have the first pipe section 56 fixedly connected to the equalizing partition wall 44 before or after the second pipe section 58 is fixedly connected to the peripheral wall 14. For this purpose, for example, the fastening regions 64, 66 can be formed by material bonding, in particular welding, where the first pipe section 56 of the exhaust pipe 30 abuts against the opening edge sections 48, 50.
[0038] exist Figure 3 and Figure 4 It can be clearly seen in FIG. 1 that, based on the long hole-shaped design of the balancing pipe opening 42, at least one side of the exhaust gas pipe 30 introduced into or passing through the balancing pipe opening is provided along the longitudinal direction R of the balancing opening. A The gaps 68 and 70 are formed respectively, and the chambers 28 formed on both sides of the balancing partition wall 44 are formed through the gaps.2 , 28 3 This is not detrimental to the functionality of the muffler 10, since the chamber 28 2 and 28 3 They are already connected to one another by means of connecting openings 36. If the entire opening cross section provided for this connection is important for the sound-absorbing properties, the opening cross section introduced by gaps 68 and / or 70 can be compensated by a correspondingly smaller number and / or size of connecting openings 36.
[0039] The design of the silencer 10 according to the invention with at least one balancing partition or balancing pipe opening makes it possible to position the corresponding exhaust pipe passing through or engaging in such a balancing pipe opening with a greater degree of freedom, thereby achieving in particular the previously described precise orientation with respect to other components, such as the peripheral wall. Figure 4 As shown in , the longitudinal direction of the balancing opening is oriented parallel to the direction in which the exhaust pipe should be oriented exactly relative to the other components. In the design example shown, this is the second pipe longitudinal axis section L R2 The extension direction of Figure 4 As can be seen in FIG. 1 , the second tube longitudinal axis section is parallel to the longitudinal direction R of the balancing opening. A In the assembled state, it also corresponds approximately to the center axis of the tube opening 62 formed in the peripheral wall 14 .
[0040] The design according to the invention is also particularly advantageous when the exhaust pipe passes through multiple partitions or one or more partitions and an end wall, thereby avoiding overdetermination in the defined positioning and preventing the exhaust pipe from getting stuck in the area where it passes through a partition or an end wall.
Claims
1. A muffler for an exhaust system of an internal combustion engine, the muffler comprising a muffler housing (12), the muffler housing having a peripheral wall (14) surrounding a muffler interior space (24), at least one balancing partition wall (44) arranged in the muffler interior space (24), and at least one exhaust gas pipe (30), the exhaust gas pipe passing through the balancing partition wall in the region of a balancing pipe opening (42) formed in the at least one balancing partition wall (44), wherein: The balance pipe opening (42) is transverse to the opening center axis (M) of the balance pipe opening (42). O ) at least one of the openings having a central axis (M O ) is perpendicular to the longitudinal direction of the balanced opening (R A ) has a balanced opening internal dimension (I L ), and the exhaust pipe (30) passing through the balancing pipe opening (42) is arranged in the longitudinal direction (R A ) has the outer dimensions of the tube (A L ), wherein the inner dimension of the balancing opening in the longitudinal direction of the balancing opening (I L ) is larger than the tube outer dimension (A L ).
2. The muffler according to claim 1, characterized in that: The exhaust pipe (30) has a substantially circular outer peripheral contour.
3. The muffler according to claim 1 or 2, characterized in that: The balancing pipe opening (42) is designed in the form of an elongated hole, wherein the balancing pipe opening (42) is formed in the exhaust gas pipe receiving section (52) by a longitudinal direction (R A ) are defined by generally parallel, generally straight-line extending opening edge segments (48, 50).
4. The muffler according to any one of claims 1 to 3, characterized in that: The balancing pipe opening (42) is substantially perpendicular to the longitudinal direction (R) of the balancing opening at least within a balancing length range (53) of the balancing pipe opening (42). A ) of the opening transverse dimension (I Q ) is approximately equal to the longitudinal direction (R A ) of the outer dimensions of the tube (A Q ).
5. The muffler according to claim 3 and claim 4, characterized in that The opening edge sections (48, 50) are substantially transverse to the longitudinal direction (R A ) is approximately equal to the distance in the longitudinal direction of the balance opening (R A ) Orthogonal to the outer dimension of the tube (A Q ).
6. The muffler according to any one of claims 1 to 5, characterized in that: The exhaust pipe (30) is perpendicular to the longitudinal direction (R A ) ground and the longitudinal axis of the tube (L R ) and is fixedly connected to the balancing partition wall (42) in at least one fastening area (64, 66) spaced apart from the balancing partition wall (42).
7. The muffler according to claim 6, characterized in that: The exhaust gas pipe (30) is connected to the compensating intermediate wall (44) in the at least one fastening region (64, 66) by material bonding, preferably welding.
8. The muffler according to claim 3 and claim 6 or 7, characterized in that: The exhaust gas pipe (30) is fixedly connected to the compensating partition wall (44) in at least one fastening region (64, 66) in the region of one of the opening edge sections (48, 50).
9. The muffler according to any one of claims 1 to 8, characterized in that: The compensating intermediate wall (44) is designed as a sheet metal profile, and the compensating pipe opening (42) is surrounded by a bead (46) formed in the compensating intermediate wall (44).
10. The muffler according to any one of claims 1 to 9, characterized in that: At least one exhaust gas pipe (30) passing through the balancing pipe opening (42) is designed as an angle pipe having a first pipe longitudinal axis section (L) passing through the balancing pipe opening (42). R1 ) and a second tube longitudinal axis section (L) which is engaged in the tube opening (62) of the circumferential wall (14). R2 ) direction, and the balance opening is longitudinally oriented in the direction (R A ) and the second tube longitudinal axis section (L R2 ) are in one plane and / or are approximately parallel to each other.
11. The muffler according to claim 10, characterized in that The first tube longitudinal axis section (L R1 ) and the second tube longitudinal axis section (L R2 ) are approximately orthogonal to each other.
12. The muffler according to any one of claims 1 to 11, characterized in that: At least two muffler inner spaces (24) are provided along the muffler longitudinal axis S. L Partition walls (261, 262, 263, 264, 265) are arranged in a direction successively from one another, at least one exhaust gas pipe (30) passes through at least two partition walls (261, 262, 263, 264, 265) in the area of a corresponding pipe opening (38, 40), and at least one of the partition walls (261, 262, 263, 264, 265), preferably each partition wall, is a balancing partition wall (44).
13. The muffler according to any one of claims 1 to 12, characterized in that: At least one, preferably a plurality of connecting openings (36) are formed in at least one, preferably each, compensating intermediate wall (44).
14. An exhaust system for an internal combustion engine, comprising at least one muffler (10) according to any one of claims 1 to 13.