CN220955781U

CN220955781U - Standing wave elimination structure of exhaust pipe and vehicle exhaust system

Info

Publication number: CN220955781U
Application number: CN202322748555.1U
Authority: CN
Inventors: 孟建; 刘兵; 周玉磊; 钱胡琪
Original assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Priority date: 2023-10-12
Filing date: 2023-10-12
Publication date: 2024-05-14
Anticipated expiration: 2033-10-12

Abstract

The utility model provides a standing wave elimination structure of an exhaust pipe and a vehicle exhaust system, wherein the standing wave elimination structure of the exhaust pipe comprises the exhaust pipe and an elimination assembly, and a first through hole communicated with the inside of the exhaust pipe is formed in the exhaust pipe; the eliminating assembly comprises a dense hole piece, the dense hole piece is arranged at the first through hole in a covering mode, and dense perforations are formed in the dense hole piece, corresponding to the covering surface of the first through hole. The standing wave eliminating structure of the exhaust pipe can interrupt the standing wave and weaken the energy transferred by the vibration of the standing wave, thereby achieving the effects of eliminating the standing wave and eliminating the bombing sound generated by the standing wave.

Description

Standing wave elimination structure of exhaust pipe and vehicle exhaust system

Technical Field

The utility model relates to the technical field of automobile parts, in particular to a standing wave elimination structure of an exhaust pipe and a vehicle exhaust system.

Background

Exhaust systems for fuel-powered vehicles are used to exhaust gases produced by engine operation and typically include exhaust pipes, mufflers, catalysts, and the like.

In the prior art, a plurality of silencers, such as a front silencer, a middle silencer and a rear silencer, are arranged on an exhaust pipe to eliminate noise to the greatest extent and ensure a comfortable driving environment.

However, due to the longer exhaust line, the sound waves create standing waves within the pipe, causing a greater booming sound, which in turn affects the ride experience.

Disclosure of utility model

Based on the above, the utility model provides a standing wave elimination structure of an exhaust pipe and a vehicle exhaust system, so as to solve the technical problem that the existing vehicle exhaust system generates larger bombing sound by standing waves.

In a first aspect, the present utility model provides a standing wave elimination structure of an exhaust pipe, including an exhaust pipe and an elimination assembly, wherein a first through hole communicated with the inside of the exhaust pipe is formed on the exhaust pipe;

The eliminating assembly comprises a dense hole piece, the dense hole piece is arranged at the first through hole in a covering mode, and dense perforations are formed in the dense hole piece, corresponding to the covering surface of the first through hole.

In one possible implementation, the densely perforated holes are rectangular holes, the width of the rectangular holes is 0.1 mm-0.25 mm, and the aperture ratio on the covering surface is not less than 90%.

In one possible implementation, the abatement assembly further includes a mount fixedly connecting the perimeter of the dense patch to the exhaust pipe around the first through hole.

In one possible implementation manner, one side of the mounting piece is provided with a containing groove for containing the dense hole piece, and the mounting piece is also provided with a second through hole for communicating with the containing groove;

The sealing hole piece is arranged in the accommodating groove, and the periphery of the sealing hole piece is welded with the mounting piece;

The second through hole is opposite to the first through hole, one side, close to the accommodating groove, of the mounting piece abuts against the exhaust pipe, and the mounting piece is connected with the exhaust pipe in a welding mode.

In one possible implementation, the abatement assembly further includes a shield member disposed over the mounting member and coupled to the exhaust pipe, leaving an open cavity between the shield member and the mounting member.

In one possible implementation, the opening in the open cavity is directed towards the rear of the exhaust pipe.

In one possible implementation, the guard is welded to the exhaust pipe.

In a second aspect, the present utility model also provides a vehicle exhaust system comprising an exhaust pipe and any one of the possible standing wave elimination structures of the exhaust pipe provided in at least one first aspect provided on the exhaust pipe.

In one possible implementation, the exhaust pipe has at least one standing wave point, and at least one standing wave eliminating structure of the exhaust pipe is disposed at the standing wave point.

In one possible implementation, the device further comprises at least one muffler, and the exhaust pipe is in communication with the muffler.

The utility model provides a standing wave elimination structure of an exhaust pipe and a vehicle exhaust system. The standing wave is eliminated by arranging a first through hole communicated with the inside of the exhaust pipe on the exhaust pipe and arranging an eliminating component at the first through hole. The eliminating assembly comprises a dense hole piece, dense perforations are formed in the dense hole piece, the dense hole piece is arranged at the first through hole in a covering mode, and the dense perforations are formed in the dense hole piece, corresponding to the first through hole, in the covering mode, when standing waves pass through the first through hole in the transmission process of the exhaust pipe, the standing waves pass through the dense perforations in the dense hole piece, resonance is eliminated, the standing waves are broken, energy transmitted by vibration of the standing waves is weakened, and the effects of eliminating the standing waves and eliminating the bombing sound generated by the standing waves are achieved. Therefore, the standing wave eliminating structure of the exhaust pipe can eliminate standing waves and the bombing sound generated by the standing waves, and improve driving experience.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of a standing wave elimination structure of an exhaust pipe according to an embodiment of the present utility model;

FIG. 2 is an exploded view of the standing wave elimination structure of the exhaust pipe of FIG. 1;

FIG. 3 is a partial view of the standing wave elimination structure of the exhaust pipe of FIG. 1;

fig. 4 is a schematic diagram of mounting positions of a standing wave elimination structure of three standing wave points on an exhaust pipe according to an embodiment of the present utility model.

Reference numerals:

100: an exhaust pipe;

110: a first through hole;

200: an abatement assembly;

210: a dense hole sheet;

211: densely perforating;

220: a mounting member;

221: a receiving groove;

222: a second through hole;

230: a guard;

231: an open cavity;

300: a muffler.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the utility model. Rather, they are merely examples of methods and apparatus consistent with aspects of the utility model as detailed in the accompanying claims.

The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As noted in the background, exhaust systems of fuel-fired vehicles are used to exhaust gases produced by engine operation and typically include exhaust pipes, mufflers (also called silencers), catalysts, and the like. In the prior art, taking the front-mounted vehicle type of the engine as an example, the exhaust pipe is connected with the exhaust manifold of the engine and then extends and distributes towards the tail direction, wherein most of noise can be eliminated by arranging a plurality of silencers, such as a front silencer, a middle silencer and a rear silencer, on the exhaust pipe, and a comfortable driving environment is ensured. However, because the exhaust pipe is long, particularly the exhaust pipe between the middle silencer and the rear silencer is long, the sound wave generates standing waves in the pipeline, and noise such as large bombing sound is caused, so that driving experience is affected. And the internal structure of the muffler is complex, and the arrangement of a plurality of mufflers not only increases the manufacturing cost of the whole vehicle, but also increases the weight of the whole vehicle and the like, so that the problem of need of optimization is solved.

In view of the foregoing problems in the prior art, the present utility model provides a standing wave eliminating structure of an exhaust pipe and an exhaust system of a vehicle. The utility model provides a standing wave elimination structure of an exhaust pipe, which comprises the exhaust pipe and an elimination assembly. The standing wave is eliminated by arranging a first through hole communicated with the inside of the exhaust pipe on the exhaust pipe and arranging an eliminating component at the first through hole. The eliminating assembly comprises a dense hole piece, dense perforations are formed in the dense hole piece, the dense hole piece is arranged at the first through hole in a covering mode, and the dense perforations are formed in the dense hole piece, corresponding to the first through hole, in the covering mode, when standing waves pass through the first through hole in the transmission process of the exhaust pipe, the standing waves pass through the dense perforations in the dense hole piece, resonance is eliminated, the standing waves are broken, energy transmitted by vibration of the standing waves is weakened, and the effects of eliminating the standing waves and eliminating the bombing sound generated by the standing waves are achieved.

In the following, an exemplary application scenario of an embodiment of the present utility model is described.

The standing wave eliminating structure of the exhaust pipe can be applied to passenger cars with fuel engines, wherein the passenger cars generally comprise cars, pickup trucks, utility vehicles MPV (Multiple purpose vehicle), off-road vehicles SUV (Sport utility vehicle) and other light cars, and particularly, the standing wave eliminating structure of the exhaust pipe can be applied to the exhaust pipe communicated with an exhaust port of an engine, such as the position between a middle silencer and a rear silencer, so that standing waves and bombing sounds generated by the standing waves can be eliminated through the standing wave eliminating structure of the exhaust pipe, and driving experience is improved.

The technical scheme of the utility model is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.

FIG. 1 is a schematic view of a standing wave elimination structure of an exhaust pipe according to an embodiment of the present utility model; FIG. 2 is an exploded view of FIG. 1; FIG. 3 is a partial view of FIG. 1; fig. 4 is a schematic diagram of mounting positions of a standing wave elimination structure of three standing wave points on an exhaust pipe according to an embodiment of the present utility model.

Referring to fig. 1-3, the standing wave eliminating structure of the exhaust pipe provided in this embodiment includes an exhaust pipe 100 and an eliminating component 200, where a first through hole 110 communicating with the interior of the exhaust pipe 100 is formed on the exhaust pipe 100.

The eliminating assembly 200 includes a sealing plate 210, wherein the sealing plate 210 is arranged at the first through hole 110 in a covering manner, and a dense perforation 211 is arranged on the sealing plate 210 corresponding to the covering surface of the first through hole 110.

In this embodiment, the exhaust pipe 100 is connected to an exhaust branch pipe on the fuel engine for exhausting exhaust gas generated by the engine operation, and the exhaust pipe 100 may be disposed on the chassis in the direction from the head to the tail. A plurality of mufflers, such as a front muffler, a center muffler, and a rear muffler, may be mounted on the exhaust pipe 100 to reduce engine noise, and a three-way catalyst may be mounted on the front section of the exhaust pipe 100 to purify exhaust gas.

The exhaust pipe 100 is provided with a first through hole 110 for passing the standing wave, and the first through hole 110 may be disposed at a position between a longer section of the pipeline, such as a middle muffler and a rear muffler, where the specific position and the specific size of the first through hole 110 may be determined according to the actual requirement, which is not limited in this embodiment.

The abatement assembly 200 includes a closed cell sheet 210, which may be a sheet-like structure made of a metallic material, the closed cell sheet 210 being blanket-mounted at the first through-hole 110. The periphery of the sealing plate 210 may be connected to the exhaust pipe 100 around the first through hole 110 by welding, or the periphery of the sealing plate 210 may be pressed against the exhaust pipe 100 around the first through hole 110 by other components, which is not particularly limited in this embodiment.

The dense perforated holes 211 are disposed on the covering surface of the dense perforated sheet 210 corresponding to the first through holes 110, where the dense perforated holes 211 are micro-perforated holes densely arranged on the dense perforated sheet 210, and the micro-perforated holes may be disposed on the dense perforated sheet 210 in an array or may be disposed on the dense perforated sheet 210 in a staggered manner, and the dense perforated holes 211 may be rectangular holes, kidney-shaped holes, in-line holes, square holes, round holes, or the like. The dense perforations 211 are used to pass through and absorb the standing waves, and prevent the standing waves from being transmitted in the pipe in a reflection manner, so that the standing waves are broken and eliminated, and the dense perforations 211 prevent the exhaust gas from passing through as much as possible.

Specifically, when the standing wave passes through the first through holes 110 during the transmission in the exhaust pipe 100, the standing wave passes through the densely perforated holes 211 of the densely perforated plate 210 to be interrupted, and the energy of vibration transmission is weakened, thereby achieving the effects of eliminating the standing wave and eliminating the booming sound generated by the standing wave.

It can be understood that, compared with the structure in the prior art that a plurality of silencers are provided on the exhaust pipe, the application of the standing wave eliminating structure of the exhaust pipe in this embodiment can reduce the number of the silencers and use a smaller volume of the silencers on the premise of ensuring the silencing performance of the exhaust pipe. Thereby reducing the weight of the whole vehicle and reducing the manufacturing cost of the whole vehicle.

The standing wave elimination structure of the exhaust pipe provided in the present embodiment includes the exhaust pipe 100 and the elimination assembly 200. Standing waves are eliminated by providing the exhaust pipe 100 with a first through hole 110 communicating with the inside of the exhaust pipe 100, and by providing the elimination assembly 200 at the first through hole 110. The eliminating assembly 200 includes a dense perforated plate 210, and by covering the dense perforated plate 210 at the first through hole 110 and providing dense perforations 211 on the dense perforated plate 210 corresponding to the coverage of the first through hole 110, when the standing wave passes through the dense perforations 211 on the dense perforated plate 210 during the transmission of the standing wave in the exhaust pipe, resonance is eliminated, thereby breaking the standing wave and weakening the energy of vibration transmission thereof, and achieving the effects of eliminating the standing wave and eliminating the booming sound generated by the standing wave.

Therefore, the standing wave eliminating structure of the exhaust pipe can eliminate standing waves and the bombing sound generated by the standing waves, and improve driving experience. In addition, through using this standing wave elimination structure, can cancel leading silencer, and under the prerequisite that satisfies the exhaust sound damping performance moreover, the rear silencer that the volume is smaller can be installed to the terminal of blast pipe to also alleviateed the weight of whole car and reduced whole car manufacturing cost.

In one possible design, as shown in fig. 1-3, in the standing wave eliminating structure of the exhaust pipe provided in this embodiment, the dense perforations 211 are rectangular holes or kidney-shaped holes, the width of the rectangular holes or kidney-shaped holes is 0.1mm to 0.25mm, and the length is not particularly limited. The aperture ratio on the cover surface is not less than 90%, and the aperture ratio refers to the percentage of the area of the hole on the cover surface to the area of the cover surface. Thus, the effects of better eliminating standing waves and less air leakage can be achieved.

Illustratively, the dense perforations 211 are elongated rectangular holes having a width of 0.15mm, the length of the rectangular holes is not limited, and the aperture ratio on the cover surface is 90% or more. Of course, the width of the rectangular hole can be slightly larger than 0.25mm or slightly smaller than 0.1mm, and the aperture ratio on the covering surface can be slightly smaller than 90%. Of course, the dense perforation 211 should also take into consideration the influence of the precision of processing, cost, etc., and in any case, it is sufficient to eliminate standing waves and to minimize air leakage, and the present embodiment is not limited excessively.

Alternatively, as shown in fig. 1 to 3, in the standing wave eliminating structure of the exhaust pipe provided in this embodiment, the eliminating assembly 200 may further include a mounting member 220, where the mounting member 220 fixedly connects the periphery of the dense hole sheet 210 to the exhaust pipe 100 around the first through hole 110. Thus, the periphery of the thinner dense hole sheet 210 can be fixed by the mounting piece 220, so that the strength of the dense hole sheet 210 is improved, and the service life of the dense hole sheet is ensured.

Further, the mounting member 220 may be configured such that, as shown in fig. 2 and 3, a receiving groove 221 for receiving the sealing hole piece 210 is formed at one side of the mounting member 220, and a second through hole 222 for communicating with the receiving groove 221 is formed in the mounting member 220. The sealing plate 210 is mounted in the receiving groove 221, and the periphery of the sealing plate 210 is welded to the mounting member 220. The second through hole 222 is opposite to the first through hole 110, one side of the mounting member 220, which is close to the accommodating groove 221, abuts against the exhaust pipe 100, and the mounting member 220 is welded to the exhaust pipe 100. This arrangement facilitates operations such as positioning and mounting of the blind via 210.

Specifically, the mounting member 220 may be a plate-shaped structure made of a metal material, and one side of the mounting member 220 is provided with a receiving groove 221, the receiving groove 221 being matched with the outer circumference of the closely spaced plate 210, and the depth of the receiving groove 221 being matched with the thickness of the closely spaced plate 210. The accommodating groove 221 is provided with a second through hole 222, and the second through hole 222 is matched with the first through hole 110 in shape and size. During installation, the sealing hole piece 210 may be first installed in the accommodating groove 221 for positioning, then the periphery of the sealing hole piece 210 is welded to the mounting piece 220, such as full-periphery laser welding, and then one side of the mounting piece 220, which is close to the accommodating groove 221, is attached to the outer wall of the exhaust pipe 100, so that the second through hole 222 is aligned with the first through hole 110, and finally the periphery of the mounting piece 220 is welded and fixed to the outer wall of the exhaust pipe 100, such as full-periphery gas shielded welding.

Still further, in order to better protect the sealing plate 210 and the mounting member 220, as shown in fig. 2 and 3, the eliminating assembly 200 may further include a protecting member 230, where the protecting member 230 is disposed on the mounting member 220 in a covering manner and is connected to the exhaust pipe 100, and an open cavity 231 is left between the protecting member 230 and the mounting member 220. Thus, in the daily driving process, the dense hole sheet 210 and the mounting piece 220 can be effectively protected, the dense holes on the dense hole sheet 210 are prevented from being blocked by dirt, water stains and the like, and the service life is prolonged.

Alternatively, as shown in fig. 1 to 3, in the present embodiment, the opening on the opening chamber 231 faces the rear of the exhaust pipe 100, i.e., the opening faces in line with the exhaust direction. In this way, the opening toward the rear of the exhaust pipe 100 can reduce wind resistance during high-speed travel with respect to the opening on the opening chamber 231 toward the front.

Of course, consideration is also given to the actual installation, for example, when the exhaust pipe is bent, the opening in the opening chamber 231 is disposed as far rearward as possible.

Alternatively, as shown in fig. 1 to 3, in the present embodiment, the guard 230 is welded to the exhaust pipe 100. In this way, the guard 230 is conveniently fastened to the outer wall of the exhaust pipe 100.

For example, the protecting member 230 may be made of a metal material (such as stainless steel, etc.) by punching, the protecting member 230 has an open cavity 231, the protecting member 230 covers the sealing hole sheet 210 and the mounting member 220, the open cavity 231 faces backward, and the periphery of the protecting member 230 is fixed to the outer wall of the exhaust pipe 100 by welding, such as gas shielded welding, etc.

The embodiment of the utility model also provides a vehicle exhaust system, which comprises an exhaust pipe 100 and at least one standing wave elimination structure of the exhaust pipe provided by any one of the embodiments arranged on the exhaust pipe 100.

The standing wave eliminating structure of the exhaust pipe is described in detail in the above embodiments, and will not be described here again.

It will be appreciated that the exhaust pipe 100 in the vehicle exhaust system has a portion provided with a standing wave eliminating structure to eliminate standing waves. For example, the standing wave elimination structure of the exhaust pipe is provided on the exhaust pipe 100 at a position between the center muffler and the rear muffler, and standing waves formed due to a longer pipe line can be eliminated.

The vehicle exhaust system provided by the embodiment of the utility model comprises the exhaust pipe 100 and the elimination component 200 by preparing the standing wave elimination structure of the exhaust pipe. Standing waves are eliminated by providing the exhaust pipe 100 with a first through hole 110 communicating with the inside of the exhaust pipe 100, and by providing the elimination assembly 200 at the first through hole 110. The eliminating assembly 200 includes a dense perforated plate 210, and by covering the dense perforated plate 210 at the first through hole 110 and providing dense perforations 211 on the dense perforated plate 210 corresponding to the coverage of the first through hole 110, when a standing wave passes through the dense perforations 211 on the dense perforated plate 210 during the transmission of the standing wave in the exhaust pipe 100, resonance is eliminated, thereby breaking the standing wave and weakening the energy of vibration transmission thereof, and achieving the effects of eliminating the standing wave and eliminating the booming sound generated by the standing wave.

Further, as shown in fig. 4, the exhaust pipe 100 has at least one standing wave point, and at least one standing wave eliminating structure of the exhaust pipe is disposed at the standing wave point. Among them, it is known from the standing wave forming condition that the standing wave is generated when the tube length is an integer multiple of half wavelength. The position of the standing wave point (i.e., the position of the antinode) can be found by calculation or simulation, for example:

1) When the length of the exhaust pipe 100 is 1 times half wavelength, there is only one standing wave point, which is located approximately at 1/2 of the total length of the exhaust pipe 100, so that the standing wave eliminating structure can be provided at 1/2 of the total length of the exhaust pipe 100.

2) When the length of the exhaust pipe 100 is 2 times the half wavelength, there are two standing wave points located approximately at 1/4 and 3/4 of the total length of the exhaust pipe 100, so that standing wave eliminating structures can be provided at 1/4 and 3/4 of the total length of the exhaust pipe 100.

3) When the length of the exhaust pipe 100 is 3 times the half wavelength, as shown in fig. 4, there are three standing wave points located approximately at 1/6, 1/2 and 5/6 of the total length of the exhaust pipe 100, so that standing wave eliminating structures can be provided at 1/6, 1/2 and 5/6 of the total length of the exhaust pipe 100.

It should be noted that the total length of the exhaust pipe 100 refers specifically to the actual length of the exhaust pipe 100 including the bent portion, that is, the actual transmission length of the exhaust pipe 100 between the mid-muffler (corresponding to the muffler 300 on the left side in fig. 4) and the rear muffler (corresponding to the muffler 300 on the right side in fig. 4).

Optionally, as shown in fig. 4, in the vehicle exhaust system of the exhaust pipe provided in the present embodiment, at least one muffler 300 is further included, and the exhaust pipe 100 is in communication with the muffler 300.

Illustratively, the front end of the exhaust pipe 100 is communicated with a centrally-mounted muffler (corresponding to the muffler 300 on the left side in fig. 4), and the rear end of the exhaust pipe 100 is communicated with a rear-mounted muffler (corresponding to the muffler 300 on the right side in fig. 4), so that one pre-mounted muffler can be saved, and a rear-mounted muffler with a smaller volume can be used or omitted, thereby installing a rear-mounted muffler with a smaller volume at the tail end of the exhaust pipe on the premise of meeting the exhaust silencing performance, and further reducing the weight of the whole vehicle and the manufacturing cost of the whole vehicle.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.

It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims

1. The standing wave elimination structure of the exhaust pipe is characterized by comprising the exhaust pipe and an elimination assembly, wherein a first through hole communicated with the inside of the exhaust pipe is formed in the exhaust pipe;

The eliminating assembly comprises a dense hole sheet, the dense hole sheet is arranged at the first through hole in a covering mode, and dense perforations are formed in the dense hole sheet, corresponding to the covering surface of the first through hole.

2. The standing wave elimination structure of exhaust pipe according to claim 1, wherein the densely perforated holes are rectangular holes, the width of the rectangular holes is 0.1mm to 0.25mm, and the aperture ratio on the cover surface is not less than 90%.

3. The standing wave elimination structure of an exhaust pipe according to claim 1 or 2, wherein the elimination assembly further comprises a mount fixedly connecting the dense hole sheet periphery to the exhaust pipe around the first through hole.

4. The standing wave elimination structure of exhaust pipe according to claim 3, wherein one side of said mounting member is provided with an accommodation groove for accommodating said dense hole sheet, and said mounting member is further provided with a second through hole penetrating said accommodation groove;

The sealing hole piece is arranged in the accommodating groove, and the periphery of the sealing hole piece is connected with the mounting piece in a welding way;

5. The standing wave elimination structure of an exhaust pipe according to claim 3, wherein the elimination assembly further comprises a shielding member which is arranged on the mounting member in a covering manner and is connected with the exhaust pipe, and an open cavity is left between the shielding member and the mounting member.

6. The standing wave elimination structure of an exhaust pipe according to claim 5, wherein an opening on the opening chamber faces toward the rear of the exhaust pipe.

7. The standing wave elimination structure of an exhaust pipe according to claim 5, wherein the guard is welded to the exhaust pipe.

8. A vehicle exhaust system comprising an exhaust pipe and at least one standing wave elimination structure of the exhaust pipe according to any one of claims 1 to 7 provided on the exhaust pipe.

9. The vehicle exhaust system according to claim 8, wherein the exhaust pipe has at least one standing wave point thereon, at which at least one standing wave eliminating structure of the exhaust pipe is provided.

10. The vehicle exhaust system according to claim 9 further comprising at least one muffler, the exhaust pipe being in communication with the muffler.