CN210134990U

CN210134990U - Silencer, exhaust equipment and exhaust system with dynamic sound

Info

Publication number: CN210134990U
Application number: CN201920227900.8U
Authority: CN
Inventors: 靳永军; 万骞; 赵新民; 杨福生
Original assignee: Hippocampal New Energy Automobile Co Ltd; Hippocampus Motor Co Ltd
Current assignee: Hippocampal New Energy Automobile Co Ltd; Hippocampus Motor Co Ltd; Haima Motor Corp; Haima New Energy Vehicle Co Ltd
Priority date: 2019-02-21
Filing date: 2019-02-21
Publication date: 2020-03-10
Anticipated expiration: 2029-02-21

Abstract

The utility model discloses a silencer, exhaust apparatus and have exhaust system of dynamic sound relates to car silencer technical field. The silencer comprises a shell and a silencing pipe, wherein the silencing pipe is arranged in the shell, one end of the silencing pipe is communicated with the outside of the shell, the other end of the silencing pipe is communicated with an inner cavity of the shell, and the silencing pipe is provided with a bending part. The silencer has the advantages of reasonable design, simple structure and easy production, not only can enhance the silencing performance of low frequency bands, but also can enhance the silencing performance of medium and high frequency bands, reduce the low-rotating-speed rumbling of exhaust and improve the quality of dynamic sound.

Description

Silencer, exhaust equipment and exhaust system with dynamic sound

Technical Field

The utility model relates to an automobile muffler technical field particularly, relates to a silencer, exhaust apparatus and have exhaust system of dynamic sound.

Background

The noise elimination performance design of the current exhaust system mostly aims at small noise pressure level, and along with the improvement of NVH technology, the noise pressure level of an automobile is well controlled.

With the social development, the personalized requirements of consumers on automobiles are continuously improved, so that the noise elimination characteristics and the sound quality of part of mufflers not only need to meet the requirements of sound pressure level, but also need to meet the personalized requirements of dynamic sound quality.

How to design an exhaust system capable of controlling the exhaust noise sound pressure level and the dynamic sound quality is an urgent technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a silencer can control exhaust noise sound pressure level and dynamic sound quality.

The embodiment of the utility model is realized like this:

based on above-mentioned purpose, the embodiment of the utility model provides a silencer, including casing and muffler pipe, muffler pipe set up in the casing and one end and the outside intercommunication of casing, the other end with the inner chamber intercommunication of casing, muffler pipe is provided with the kink.

In addition, according to the utility model discloses a silencer that the embodiment provided can also have following additional technical characterstic:

in an optional embodiment of the present invention, the bending portion includes a first arc-shaped section, a first straight-line section, a second arc-shaped section and a second straight-line section which are connected in sequence, a plurality of partition plates are disposed in the housing, and an inner cavity of the housing is divided into a first cavity, a second cavity, a third cavity and a fourth cavity by the plurality of partition plates;

the first arc-shaped section is located in the first cavity, the second arc-shaped section is located in the fourth cavity, one end, far away from the first straight line section, of the first arc-shaped section is communicated with the outside of the shell, and one end, far away from the second arc-shaped section, of the second straight line section is communicated with the first cavity.

In an optional embodiment of the present invention, the volume of the first chamber is greater than the volume of the fourth chamber, and the volume of the fourth chamber is greater than the volume of the second chamber and the volume of the third chamber, respectively.

In an optional embodiment of the present invention, the first straight line segment includes a flow guiding portion, the flow guiding portion is provided with a first flow guiding hole communicating the inner cavity of the noise elimination tube with the third chamber, and the second arc-shaped segment is provided with a second flow guiding hole communicating the inner cavity of the noise elimination tube with the fourth chamber;

the aperture of the first flow guide holes is larger than that of the second flow guide holes, and the number of the first flow guide holes is larger than that of the second flow guide holes.

The utility model discloses an in optional embodiment, the silencer still includes first tail pipe and second tail pipe, first tail pipe is worn to locate first cavity will second cavity and external intercommunication, the second tail pipe is worn to locate the fourth cavity with the third cavity will second cavity and external intercommunication, the length dimension of first tail pipe is greater than the length dimension of second tail pipe.

The utility model also provides an exhaust apparatus, including foretell silencer.

In an optional embodiment of the present invention, the exhaust apparatus further comprises a pre-muffler, the pre-muffler is connected to one end of the muffling pipe through a first exhaust line.

In an optional embodiment of the present invention, the pre-muffler includes a housing, a main muffling pipe and two front muffling plates, the main muffling pipe is disposed through an inner cavity of the housing and is communicated with the first exhaust pipe, the two front muffling plates are disposed at an interval, and the main muffling pipe is divided into a first section, a second section and a third section;

the first section and the third section are provided with first communicating holes, the second section is provided with second communicating holes, the number of the first communicating holes is larger than that of the second communicating holes, and the aperture of the first communicating holes is smaller than that of the second communicating holes.

The utility model also provides an exhaust system with active sound, including foretell exhaust apparatus.

In an optional embodiment of the present invention, the exhaust system further comprises an exhaust hot end and a pre-muffler, wherein the exhaust hot end is connected to one end of the pre-muffler, which is far away from the muffler, through a second exhaust pipeline.

The embodiment of the utility model provides a beneficial effect is: the noise control device has the advantages of reasonable design, simple structure, capability of properly controlling the sound pressure level of the exhaust noise and generating dynamic sound quality, capability of meeting individual requirements of consumers and low noise sharpness, low back pressure and high consistency of the noise quality of the left tail pipe port and the right tail pipe port of the exhaust system.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of a muffler according to embodiment 1 of the present invention at a first viewing angle;

FIG. 2 is a schematic view of a muffler from a second perspective;

FIG. 3 is a cross-sectional view of the tailpipe connection of FIG. 1;

FIG. 4 is a schematic view of an exhaust apparatus provided in the present embodiment 2;

FIG. 5 is a cross-sectional view of the pre-muffler of FIG. 4;

fig. 6 is a schematic structural diagram of an exhaust system with dynamic sound provided in embodiment 3;

fig. 7 is a graph of band division and transmission loss performance.

Icon: 10-a muffler; 11-a housing; 112-a first chamber; 113-a second chamber; 114-a third chamber; 116-a fourth chamber; 12-a muffler pipe; 121-a first arc segment; 123-a first straight line segment; 124-a second arc segment; 126-second straight line segment; 128-first flow guide holes; 129-second diversion holes; 131-a first separator; 132 — a first perforation; 133-a second separator; 134-a second perforation; 135-a third separator; 136-third perforation; 14-a first tailpipe; 15-a second tailpipe; 152-an outer tube section; 154-inner tube section; 156-end wall; 20-an exhaust device; 21-a pre-muffler; 211-a housing; 213-main muffler pipe; 215-front baffle plate; 221-first stage; 222-a second segment; 223-third section; 224 — a first via hole; 225-second communication hole; 226-forward eliminating the first chamber; 227-pre-eliminating the second chamber; 228-anterior elimination of the third chamber; 25-a first exhaust line; 30-an exhaust system; 31-exhaust hot end; 32-a second exhaust line; 324-a first pipe section; 326-a second pipeline section; 328-flange pair.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "first", "second", "third", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

Example 1

Fig. 1 is a schematic view of a muffler 10 provided in this embodiment 1 from a first perspective, and fig. 2 is a schematic view of the muffler 10 from a second perspective, as shown in fig. 1 and fig. 2.

The muffler 10 provided by this embodiment 1 is used as a silencing assembly component, and adopts a large-volume low-frequency silencing cavity structure and a silencing pipe 12 structure with a bending portion and a long length, so as to greatly enhance the silencing performance of a low frequency band.

The specific structure and the correspondence between the various components of the muffler 10 will be described in detail below.

The muffler 10 includes a housing 11, a muffler pipe 12, a partition, a first tail pipe 14, and a second tail pipe 15. The casing 11 is a cylindrical thin-wall hollow structure with an oval longitudinal section, the casing 11 comprises a side wall and two opposite end walls 156, the muffler pipe 12 penetrates through the side wall and is positioned in the casing 11, one end of the muffler pipe 12 is communicated with the outside of the casing 11, the other end of the muffler pipe is communicated with the inner cavity of the casing 11, the first tail pipe 14 and the second tail pipe 15 penetrate through the two end walls 156 respectively, one end of the tail pipe is positioned in the casing 11, the other end of the tail pipe is communicated with the outside of the casing 11, and partition plates are arranged in the casing 11 at intervals to divide the inner cavity of the casing 11 into a plurality.

The muffling tube 12 is provided with a bending portion so that the muffling tube 12 is arranged inside the housing 11 in a winding manner, the number of the partition plates is three, and the inner cavity of the housing 11 is sequentially divided into a first chamber 112, a second chamber 113, a third chamber 114 and a fourth chamber 116.

Specifically, the bent portion includes a first arc-shaped segment 121, a first straight segment 123, a second arc-shaped segment 124 and a second straight segment 126 connected in sequence. The bending angle of the first arc-shaped section 121 is about 90 degrees, the first arc-shaped section 121 is located in the first chamber 112, the extending direction of the first straight line section 123 is the same as the central axis of the shell 11, the second arc-shaped section 124 is located in the fourth chamber 116, the second straight line section 126 is parallel to the first straight line section 123, one end, far away from the first straight line section 123, of the first arc-shaped section 121 is communicated with the outside of the shell 11, one end, far away from the second arc-shaped section 124, of the second straight line section 126 is communicated with the first chamber 112, and the second arc-shaped section 124 can also adopt a stamping clamshell welding mode to replace a bent pipe.

Optionally, the first straight line segment 123 includes a flow guiding portion, the flow guiding portion is provided with a first flow guiding hole 128 communicating the inner cavity of the muffler pipe 12 with the third chamber 114, and the second arc-shaped segment 124 is provided with a second flow guiding hole 129 communicating the inner cavity of the muffler pipe 12 with the fourth chamber 116.

Compared with the second diversion holes 129, the first diversion holes 128 have a larger aperture than the second diversion holes 129, and the number of the first diversion holes 128 is larger than the number of the second diversion holes 129. The muffler pipe 12 located inside the housing 11 has a substantially U-shaped configuration, i.e., the first straight section 123, the second curved section 124, and the second straight section 126 form a U-shaped configuration. And the muffler pipe 12 is made of stainless steel.

In this embodiment, the aperture of the first guiding hole 128 is 8mm, and the first guiding hole 128 is not limited to a circular hole, but may also be a hole with other shapes such as a long strip, an ellipse, a rectangle, and the like.

A first chamber 112, a second chamber 113, a third chamber 114 and a fourth chamber 116 which are sequentially divided by a plurality of partition plates, wherein the volume of the first chamber 112 is larger than that of the fourth chamber 116, and the first chamber 112 is communicated with the silencing pipe 12 and is mainly used for eliminating low-frequency noise; the volume of the fourth chamber 116 is respectively larger than the volume of the second chamber 113 and the volume of the third chamber 114, sound-absorbing cotton is filled in the fourth chamber 116 and used for broadband noise elimination, and the sound-absorbing cotton is made of fiber materials and mainly aims at high-frequency noise; the volume of the second chamber 113 and the volume of the third chamber 114 may be equal or different, but the volumes are smaller than the volume of the fourth chamber 116, so as to eliminate the noise in the broadband.

Optionally, the second chamber 113, the third chamber 114 and the fourth chamber 116 need to avoid forming a long expansion chamber to properly control the amount of sound attenuation in the middle frequency band.

Optionally, the first tail pipe 14 penetrates through the first chamber 112 to communicate the second chamber 113 with the outside, when the structural arrangement of the muffler 10 is limited, the length of the first tail pipe 14 is greater than the length of the second tail pipe 15, and the pipe diameter of the first tail pipe 14 is greater than the pipe diameter of the second tail pipe 15, so that the pressure loss of the pipes of the first tail pipe 14 and the second tail pipe 15 is consistent, and the consistency of the sound quality is improved.

The second tail pipe 15 penetrates through the fourth chamber 116 and the third chamber 114 to communicate the second chamber 113 with the outside, and the length of the first tail pipe 14 is larger than that of the second tail pipe 15, so that the broadband noise elimination is realized.

In the present embodiment, the number of the partition plates is three, and the partition plates are respectively a first partition plate 131, a second partition plate 133 and a third partition plate 135, and the first partition plate 131, the second partition plate 133 and the third partition plate 135 are arranged in parallel at intervals, so as to divide the inner cavity of the housing 11 into the first chamber 112, the second chamber 113, the third chamber 114 and the fourth chamber 116.

Optionally, the first partition 131 is provided with first through holes 132 for communicating the first chamber 112 and the second chamber 113, the number of the first through holes 132 is small, the aperture is small, and the first through holes are mainly used for tuning and can make the transmission loss transition uniform; the second partition 133 is provided with second through holes 134, the second through holes 134 are used for communicating the second chamber 113 and the third chamber 114, the number of the second through holes 134 is larger than that of the first through holes 132, and the aperture of the second through holes 134 is slightly larger than that of the first through holes 132, and the second through holes 134 are mainly used for air flow passing and tuning; the third partition 135 is provided with third through holes 136, the third through holes 136 are used for communicating the third chamber 114 with the fourth chamber 116, the number of the third through holes 136 is larger than that of the second through holes 134, and the aperture of the third through holes 136 is smaller than that of the second through holes 134, so that the third partition mainly plays a role in tuning.

Optionally, the first partition plate 131 and the second partition plate 133 are both provided with ribs for enhancing the strength of the partition plates and reducing the sound radiation of the partition plates, and the shape of the third partition plate 135 is substantially the same as that of the second partition plate 133, and only the number of the perforations and the aperture are different.

Optionally, the two end walls 156 of the housing 11 are respectively a first end cover and a second end cover, the first tail pipe 14 penetrates through the first chamber 112 and then penetrates out of the first end cover, the second end cover is in the same shape as the first end cover and symmetrically distributed, the second tail pipe 15 penetrates through the third chamber 114 and the fourth chamber 116 and then penetrates out of the second end cover, and the first end cover and the second end cover are both protruded outwards, so that the strength of the housing 11 is enhanced, and the volumes of the first chamber 112 and the fourth chamber 116 are increased.

Fig. 3 is a cross-sectional view of the tail pipe, as shown in fig. 3.

In this embodiment, the housing 11 is formed by rolling and pressing, and the two ends of the housing 11 are respectively connected with the first end cover and the second end cover in a sealing manner by welding, so that the housing is easy to form. The first tailpipe 14 includes an outer pipe section 152 and an inner pipe section 154 that are connected to each other, and the second tailpipe 15 also includes an outer pipe section 152 and an inner pipe section 154 that are connected to each other. The outer pipe section 152 and the inner pipe section 154 are connected at the end wall 156 of the shell 11, and are sleeved, the outer pipe section 152 and the inner pipe section 154 are sleeved and then penetrate through a penetrating hole of the end wall 156, and are finally plugged in a welding mode, and upstream parts of airflow are connected in a mode of extending into downstream parts, so that the flow noise risk can be reduced, and the sound sharpness is reduced.

Optionally, the outer pipe sections 152 of the first tail pipe 14 and the second tail pipe 15 are bent by 90 °, so that the flow noise can be reduced well.

The muffler 10 provided by this embodiment adopts the structural style of the large-volume low-frequency muffling cavity and the muffling tube 12 with the bending portion, thereby greatly enhancing the muffling performance of the low frequency band, through the arrangement of the partition board and the filling of the muffling cotton, the medium-high frequency muffling performance is enhanced, the inner cavity of the muffling tube 12 is communicated with the third chamber 114 through the first flow guide hole 128, so that the airflow in the first straight line segment 123 of the muffling tube 12 flows to the third chamber 114, the muffling capability of the low-frequency muffling cavity is fully exerted, the muffling performance of the low frequency band is improved, the low-speed booming of the exhaust gas is reduced, and the dynamic sound.

The first tail pipe 14 and the second tail pipe 15 are designed to be different in diameter, the length dimension of the first tail pipe 14 is larger than that of the second tail pipe 15, but the diameter of the first tail pipe 14 is larger than that of the second tail pipe 15, sound quality consistency of the left tail pipe and the right tail pipe is improved, the equivalent tail pipe length is properly controlled, standing wave frequency of the equivalent tail pipe is enabled to be in a range of 150-300 Hz, and dynamic sound quality is enhanced.

It will be appreciated that the tailpipe connection may be applied to other similar connection locations.

The utility model discloses the beneficial effect that silencer 10 that embodiment 1 provided has is: the silencer has the advantages of being reasonable in design, simple in structure and easy to produce, not only being capable of enhancing the silencing performance of low frequency bands, but also being capable of enhancing the silencing performance of medium and high frequency bands, reducing the low-rotating-speed bombing of exhaust and improving the quality of dynamic sound.

Example 2

Embodiment 2 of the present invention provides an exhaust apparatus 20, including the muffler 10 as provided in embodiment 1, the exhaust apparatus 20 further including a pre-muffler 21, the pre-muffler 21 being connected to one end of the muffler pipe 12 through a first exhaust line 25,

fig. 4 is a schematic view of the exhaust apparatus 20, and fig. 5 is a sectional view of the pre-muffler 21 of fig. 4, and the pre-muffler 21 will be described in detail with reference to fig. 4 and 5.

The pre-muffler 21 includes a housing 211, a main muffler pipe 213 and two front muffling plates 215, the main muffler pipe 213 is a cylindrical structure, and is inserted into the inner cavity of the housing 211 and communicated with the first exhaust pipe 25, and the two front muffling plates 215 are disposed at an interval and divide the main muffler pipe 213 into a first section 221, a second section 222 and a third section 223.

The first section 221 and the third section 223 are both provided with first communicating holes 224, the second section 222 is provided with second communicating holes 225, the number of the first communicating holes 224 is larger than that of the second communicating holes 225, and the aperture of the first communicating holes 224 is smaller than that of the second communicating holes 225.

The two front muffling plates 215 divide the inner cavity of the housing 211 into a front muffling first chamber 226, a front muffling second chamber 227 and a front muffling third chamber 228, and the second communication hole 225 is formed in the second section 222 of the main muffling pipe 213, so that the similar acoustic effect can be achieved, the exhaust back pressure can be reduced, and the power performance can be improved.

Optionally, the outer shell 211 is a cylindrical structure with a circular thin wall in a longitudinal section, two ends of the outer shell form an end cone through a spinning process, and the end cone is connected with the first exhaust pipeline 25 in a welding manner, that is, two ends of the first exhaust pipeline 25 are respectively connected with the pre-silencer 21 and the silencer 10 in a welding manner.

It will be appreciated that the housing 211 may be formed in other ways, such as by attaching an outer housing and a stamped end cap, respectively, instead of spinning the end cone on the housing 211.

Optionally, the front silencing first cavity 226 is used for medium-high frequency broadband silencing, sound absorbing cotton is arranged in the front silencing first cavity 226, sound absorbing cotton is also arranged in the front silencing third cavity 228, the sound absorbing cotton is made of fiber materials, the volume of the front silencing second cavity 227 is small relative to the front silencing first cavity 226 and the front silencing third cavity 228, and the front silencing first cavity 226, the front silencing second cavity 227 and the front silencing third cavity 228 are all used for medium-high frequency broadband silencing.

Optionally, the front baffle plate 215 is made of stainless steel, air guide holes are formed in the front baffle plate 215, the number of the air guide holes is large, the hole diameter is small, and the front baffle plate is used for communicating two adjacent cavities. The pre-muffler 21 mainly aims at medium-high frequency noise elimination, so that the sound pressure level of the noise of the exhaust equipment 20 is proper, and dynamic sound quality is achieved.

Example 3

Embodiment 3 of the present invention provides an exhaust system 30 with dynamic sound, including the exhaust apparatus 20 provided as embodiment 2, the specific description is as follows:

fig. 6 is a schematic structural diagram of the exhaust system 30, please refer to fig. 6.

The exhaust system 30 includes a pre-muffler 21 and a hot exhaust end 31, and the hot exhaust end 31 is connected to an end of the pre-muffler 21 away from the muffler 10 through a second exhaust pipe 32. Wherein, the exhaust hot end 31 is internally provided with an exhaust purification carrier. Second exhaust gas line 32 includes a first line segment 324 and a second line segment 326, wherein first line segment 324 is connected to exhaust hot end 31 by a pair of flanges 328, and a section of first line segment 324 near exhaust hot end 31 is a flexible device having a vibration damping effect.

Optionally, the first pipe section 324 and the second pipe section 326 are connected by a flange pair 328, one end of the second pipe is fixedly connected with the flange pair 328 by welding, and the other end is also fixedly connected with the pre-muffler 21 by welding.

It will be appreciated that the flange pair 328 may be replaced by other band-type sealing connectors, and the specific form is not limited, but is satisfactory for the fixed connection and sealing function.

The utility model discloses a design based on exhaust apparatus 20, pre-silencer 21 and exhaust hot end 31 is integrated to be gone up and is realized, and the non-is to exhaust manifold length differentiation, perhaps modifies the mode of engine ignition control strategy, more can embody its advantage and characteristics on the car that carries on the supercharged engine type. When the automobile runs, the exhaust gas burned in the engine cylinder enters the exhaust system 30 provided by the embodiment after passing through the exhaust manifold or the supercharger, passes through the exhaust hot end 31, the pre-muffler 21 and the muffler 10 in sequence, and is finally discharged to the atmosphere through the first tail pipe 14 and the second tail pipe 15.

Fig. 7 is a graph of band division and transmission loss performance, please refer to fig. 7. Wherein the abscissa is frequency in Hz, the ordinate is transmission loss in decibels (dB) at the corresponding frequency; in general, the greater the transmission loss at a corresponding frequency, the greater the silencing effect, and the lower the noise pressure level at that frequency.

The exhaust hot end 31 and the first and second exhaust pipelines 32 have a certain silencing function, and when airflow passes through the pre-silencer 21, the communicating holes and the through holes are sequentially connected with each adjacent pipeline and cavity to form the impedance composite silencer 10, so that high-frequency noise and part of middle-low frequency noise are mainly reduced. As the gas stream passes through the muffler 10, the components form a sound-deadening unit that primarily attenuates low frequency components, high frequency components, and portions of mid-frequency components. The target transmission loss and the target sound quality are finally achieved, and the overall trend is shown as a transmission loss curve B in fig. 7.

The transmission loss curve C obtained by calculation by using the design optimization structure basically meets the requirement trend line B, large transmission loss exists in a frequency band interval R1, proper transmission loss exists in a frequency band R2, and large transmission loss exists in a frequency band interval R3, so that the main-order energy is reduced, the harmonic-order and half-order energy in an R2 interval is properly improved, high-frequency energy components such as flow noise are reduced, and the effects that the sound pressure level is proper and dynamic sound quality is achieved.

As shown by curve D in fig. 7, the first through hole 132 is added to the first partition 131, so that the curve transition is smooth, and the valley value is increased at the boundary frequency position of the frequency bands R1 and R2, thereby improving the linearity of the exhaust noise and improving the quality of the exhaust sound.

Therefore, the exhaust system 30 provided in this embodiment can properly control the exhaust noise sound pressure level and generate dynamic sound quality, thereby satisfying the individual requirements of consumers, and having the advantages of low noise sharpness, low back pressure, and high consistency of the noise quality of the left and right tailpipe ports of the exhaust system 30.

It should be noted that, in the case of conflict, the features in the embodiments of the present invention may be combined with each other.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A silencer is characterized by comprising a shell and a silencing pipe, wherein the silencing pipe is arranged in the shell, one end of the silencing pipe is communicated with the outside of the shell, the other end of the silencing pipe is communicated with an inner cavity of the shell, and the silencing pipe is provided with a bending part;

the bent part comprises a first arc-shaped section, a first straight line section, a second arc-shaped section and a second straight line section which are sequentially connected, a plurality of partition plates are arranged in the shell, and an inner cavity of the shell is divided into a first cavity, a second cavity, a third cavity and a fourth cavity by the plurality of partition plates;

2. The muffler of claim 1 wherein the volume of the first chamber is greater than the volume of the fourth chamber, the volume of the fourth chamber being greater than the volume of the second chamber and the volume of the third chamber, respectively.

3. The muffler of claim 1, wherein the first straight line segment includes a flow guide portion, the flow guide portion defines a first flow guide hole communicating the inner cavity of the muffler pipe with the third chamber, and the second arcuate segment defines a second flow guide hole communicating the inner cavity of the muffler pipe with the fourth chamber;

4. The muffler according to any one of claims 1 to 3, further comprising a first tail pipe penetrating the first chamber to communicate the second chamber with the outside, and a second tail pipe penetrating the fourth chamber and the third chamber to communicate the second chamber with the outside, wherein a length dimension of the first tail pipe is greater than a length dimension of the second tail pipe.

5. An exhaust apparatus, characterized by comprising a muffler according to any one of claims 1 to 4.

6. The exhaust apparatus of claim 5, further comprising a pre-muffler connected to one end of the muffler pipe by a first exhaust line.

7. The exhaust apparatus as claimed in claim 6, wherein the pre-muffler includes a housing, a main muffler pipe penetrating an inner cavity of the housing and communicating with the first exhaust line, and two front muffling plates spaced apart from each other and dividing the main muffler pipe into a first section, a second section, and a third section;

8. An exhaust system having a dynamic sound, comprising an exhaust apparatus according to any of claims 5 to 7.

9. The exhaust system of claim 8 further comprising an exhaust hot end and a pre-muffler, the exhaust hot end connected to an end of the pre-muffler distal from the muffler by a second exhaust line.