A noise-reducing and environment-friendly vehicle exhaust pipe assembly

Abstract

The present invention discloses a noise-reducing and environment-friendly vehicle exhaust pipe assembly, comprising a front exhaust pipe, a middle exhaust pipe and a rear exhaust pipe. The front end of the front exhaust pipe is connected to a three-way catalytic converter, and the front end of the three-way catalytic converter is connected to a flange, which is connected to an external exhaust manifold. A front noise reducer is arranged between the front exhaust pipe and the middle exhaust pipe, and a heat exchange system is arranged on the front noise reducer. The present invention relates to the technical field of exhaust pipes. The noise-reducing and environment-friendly vehicle exhaust pipe assembly is provided with front and rear noise reducers on the exhaust pipe assembly to reduce the exhaust noise at the front and rear ends respectively, and the structure of the noise reducer is significantly different from the traditional noise reduction mainly relying on silencer cotton. The noise reducer is mainly improved in structure, and the sound is absorbed by arranging layers of sound channel reflection areas, and then combined with the use of silencer materials, most of the noise is absorbed inside the exhaust pipe, which significantly improves the noise reduction effect of the existing exhaust pipe.

Description

Technical Field

[0001] The invention relates to the technical field of exhaust pipes, in particular to a noise-reducing and environment-friendly vehicle exhaust pipe assembly. Background Art

[0002] Currently, internal combustion engine vehicles still occupy the main market worldwide. As we all know, internal combustion engines produce a large amount of exhaust gas when working, and the exhaust gas is discharged into the environment through the exhaust pipe.

[0003] There are two main types of harm caused by automobile exhaust to the environment, namely harmful gases (carbon monoxide, hydrocarbons and nitrogen oxides, etc.) and noise pollution. At present, the relevant research technology for eliminating harmful gases has become increasingly mature, but there is still little research on how to reduce automobile exhaust noise pollution. Most of the exhaust pipes with silencing function on the market use silencing cotton to achieve a certain noise reduction purpose. This silencing structure not only has limited noise reduction effect, but also due to the high temperature inside the exhaust pipe, the sound waves and vibrations generated by the exhaust gas are large, which will have a negative impact on the reliability of the silencing cotton.

[0004] Our company has been deeply engaged in the exhaust pipe related fields for many years. In combination with the above-mentioned current industry status, we now propose this exhaust pipe assembly, which has a highly efficient noise reduction effect and reliable quality, greatly improving the current exhaust pipe noise reduction effect. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the present invention provides a noise-reducing and environment-friendly vehicle exhaust pipe assembly, which solves the problem that the existing exhaust pipe has a poor noise reduction effect.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a noise-reducing and environment-friendly vehicle exhaust pipe assembly, comprising a front exhaust pipe, a middle exhaust pipe and a rear exhaust pipe.

[0009] A three-way catalytic converter is connected to the front end of the front exhaust pipe, and a flange is connected to the front end of the three-way catalytic converter, which is communicated with the external exhaust manifold.

[0010] A front noise reducer is arranged between the front exhaust pipe and the middle exhaust pipe, and a heat exchange system is arranged on the front noise reducer.

[0011] A purifier is arranged between the middle exhaust pipe and the rear exhaust pipe.

[0012] The rear end of the tail exhaust pipe is connected to a rear noise reducer, and the rear end of the rear noise reducer is installed with an exhaust pipe.

[0013] The exhaust pipe assembly is provided with a plurality of hanging ears fixed to the vehicle chassis.

[0014] As a further preference, the outer layer of the front noise reducer is provided with a first noise reduction chamber, and glass wool, ceramic fiber wool and a honeycomb vibration reduction layer are distributed in sequence from the outside to the inside of the first noise reduction chamber.

[0015] As a further preference, the inner layer of the front noise reducer is provided with a honeycomb conductive plate, which divides the inner layer space into a vibration reduction chamber and a second noise reduction chamber.

[0016] A vibration-damping sponge is arranged in the vibration-damping chamber, and a vibration-damping spring is embedded in the vibration-damping sponge.

[0017] There are several silencer bowls distributed horizontally in the second noise reduction room. The silencer bowls are in the shape of a lateral "eight", with a sound transmission channel reserved in the middle.

[0018] As further preferred, the heat exchange system includes a micro heat exchanger, a water inlet pipe, a cooling pipe, and a water outlet pipe, wherein the cooling pipe is arranged in the second noise reduction chamber and is laid in a circuitous manner in the gap between the silencer bowls.

[0019] The water inlet of the cooling pipe is communicated with the micro heat exchanger through the water inlet pipe, and the water outlet of the cooling pipe is communicated with the micro heat exchanger through the water outlet pipe.

[0020] The side walls of the silencer bowl and the cooling pipe are both provided with second silencer strips.

[0021] As a further preference, radial annular activated carbon filter layers are arranged in the purifier, adjacent annular activated carbon filter layers are separated by grids, compartments are formed between the grids, and carnosite is filled in the compartments.

[0022] The middle exhaust pipe is arranged at the innermost side of the annular activated carbon filter layer, and the tail exhaust pipe is arranged at the outermost side of the annular activated carbon filter layer.

[0023] As a further preference, a first sound-absorbing cotton is arranged on the periphery of the annular activated carbon filter layer.

[0024] As a further preference, a third noise reduction chamber and a fourth noise reduction chamber are respectively provided in the rear noise reducer, and a second sound-absorbing cotton is provided in the third noise reduction chamber.

[0025] A plurality of sound absorbing panels are distributed laterally in the fourth noise reduction chamber, and a sound transmission channel is opened in the middle of the sound absorbing panels.

[0026] As a further preference, a sound-absorbing protrusion is provided between adjacent sound-absorbing panels, the head of the sound-absorbing protrusion is located in the sound transmission channel of the front sound-absorbing panel, and the tail cover of the sound-absorbing protrusion is provided on the sound transmission channel of the rear sound-absorbing panel.

[0027] As a further preference, the noise-absorbing protrusion is a conical through-structure, and the inner wall of the noise-absorbing protrusion has first noise-absorbing strips symmetrically distributed up and down.

[0028] As further preferred, the length of the first sound-absorbing strip increases from left to right, and the extension length of the first sound-absorbing strip increases from left to right, so as to fully disperse the sound waves entering the sound-absorbing protrusion.

[0029] (III) Beneficial effects

[0030] The present invention provides a noise-reducing and environment-friendly vehicle exhaust pipe assembly, which has the following beneficial effects:

[0031] 1. The noise reduction and environment-friendly vehicle exhaust pipe assembly is provided with front and rear noise reducers on the exhaust pipe assembly to reduce the exhaust noise at the front and rear ends respectively. The structure of the noise reducer is significantly different from the traditional noise reduction mainly relying on silencer cotton. The noise reducer is mainly improved in structure. By providing layers of sound channel reflection areas to absorb the sound, combined with the use of silencer materials, most of the noise is absorbed inside the exhaust pipe, which significantly improves the noise reduction effect of the existing exhaust pipe.

[0032] 2. The noise-reducing and environment-friendly vehicle exhaust pipe assembly, by setting up a heat exchange system, not only effectively reduces the temperature of the exhaust gas, thereby improving the internal environment of the exhaust pipe and alleviating the damage to the internal components of the exhaust pipe caused by high temperature, but also can recycle the waste heat of the exhaust gas, thereby improving resource utilization.

[0033] 3. The noise reduction and environment-friendly vehicle exhaust pipe assembly can effectively absorb the kinetic energy of the exhaust gas during emission by arranging a vibration reduction mechanism in the front section of the noise reduction structure, thereby reducing the emission speed of the exhaust gas to a certain extent, so that the exhaust gas can fully contact the silencer structure in the exhaust pipe assembly, thereby further enhancing the noise reduction effect. Moreover, after the kinetic energy of the exhaust gas is reduced, the impact of the exhaust gas on the silencer structure during emission is also reduced, thereby extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of the present invention;

[0035] Figure 2 It is a cross-sectional view of the structure of the front noise reducer of the present invention;

[0036] Figure 3 It is a cross-sectional view of the structure of the purifier of the present invention;

[0037] Figure 4 It is a cross-sectional view of the structure of the rear noise reducer of the present invention;

[0038] Figure 5 This is a cross-sectional view of the rear noise reducer structure of the present invention.

[0039] In the figure: 1. front exhaust pipe; 2. middle exhaust pipe; 3. tail exhaust pipe; 4. three-way catalytic converter; 5. flange; 6. front noise reducer; 61. first noise reduction chamber; 62. glass wool; 63. ceramic fiber wool; 64. honeycomb vibration reduction layer; 65. honeycomb conduction plate; 66. vibration reduction chamber; 67. second noise reduction chamber; 68. vibration reduction sponge; 69. vibration reduction spring; 610. silencer bowl; 7. purifier; 71. annular active Carbon filter layer; 72. Grille; 73. Compartment; 74. First silencer; 8. Rear noise reducer; 81. Third noise reduction chamber; 82. Fourth noise reduction chamber; 83. Second silencer; 84. Sound-absorbing board; 85. Sound transmission channel; 86. Silencing protrusion; 87. First silencer strip; 9. Exhaust pipe; 10. Micro heat exchanger; 11. Water inlet pipe; 12. Water outlet pipe; 13. Cooling pipe; 14. Lifting ear; 15. Second silencer strip. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] like Figure 1 As shown, the present invention provides a technical solution: a noise-reducing and environment-friendly vehicle exhaust pipe assembly, comprising a front exhaust pipe 1, a middle exhaust pipe 2 and a rear exhaust pipe 3.

[0042] like Figure 1 As shown, the front end of the front exhaust pipe 1 is connected to a three-way catalytic converter 4 (this is the prior art and will not be described here), and the front end of the three-way catalytic converter 4 is connected to a flange 5, which is connected to an external exhaust manifold (not shown in the figure, the exhaust manifold is directly connected to the engine exhaust port).

[0043] like Figure 2 As shown, a front noise reducer 6 is arranged between the front exhaust pipe 1 and the middle exhaust pipe 2. The outer layer of the front noise reducer 6 is provided with a first noise reduction chamber 61. Glass wool 62, ceramic fiber wool 63 and honeycomb vibration reduction layer 64 are distributed in the first noise reduction chamber 61 from the outside to the inside. The first noise reduction chamber 61 can effectively isolate the internal noise of the exhaust pipe, especially the glass wool 62 and ceramic fiber wool 63 are high-quality sound insulation materials with obvious sound insulation effect. At the same time, the honeycomb vibration reduction layer 64 is provided to prevent noise propagation to a certain extent, absorb vibration, and reduce the vibration of the exhaust pipe assembly.

[0044] like Figure 2As shown, the inner layer of the front noise reducer 6 is provided with a honeycomb conductive plate 65 , and the honeycomb conductive plate 65 divides the inner layer space into a vibration reduction chamber 66 and a second noise reduction chamber 67 .

[0045] like Figure 2 As shown, a vibration-damping sponge 68 is provided in the vibration-damping chamber 66, and a vibration-damping spring 69 is embedded in the vibration-damping sponge 68. The purpose of the vibration-damping chamber 66 is to reduce the sound vibration of the exhaust gas and prevent the exhaust pipe from vibrating. Specifically, the vibration is absorbed by the vibration-damping sponge 68 and the vibration-damping spring 69, thereby weakening the kinetic energy of the exhaust gas sound during the propagation process, thereby ensuring the overall stability of the exhaust pipe assembly and avoiding its shaking.

[0046] like Figure 2 As shown, a number of silencer bowls 610 are distributed laterally in the second noise reduction chamber 67. The silencer bowls 610 are in a lateral "eight" shape, with a sound transmission channel reserved in the middle. The noise can be dispersed through the silencer bowls 610, and the sound waves propagate back and forth between the silencer bowls 610, thereby consuming a large amount of energy. As we all know, the propagation of sound relies on vibration. The greater the kinetic energy of the vibration, the louder the sound. By consuming the kinetic energy, the purpose of noise reduction is achieved.

[0047] like Figure 1-2 As shown, a heat exchange system is arranged on the front noise reducer 6, and the heat exchange system includes a micro heat exchanger 10, a water inlet pipe 11, a cooling pipe 13, and a water outlet pipe 12, wherein the cooling pipe 13 is arranged in the second noise reduction chamber 67, and is laid in a circuitous manner in the gap between the silencer bowls 610.

[0048] like Figure 1 As shown, the water inlet of the cooling pipe 13 is communicated with the micro heat exchanger 10 through the water inlet pipe 11 , and the water outlet of the cooling pipe 13 is communicated with the micro heat exchanger 10 through the water outlet pipe 12 .

[0049] Cold water is injected into the cooling pipe 13 through the water inlet pipe 11, and the cold water in the cooling pipe 13 absorbs the heat of the exhaust gas, thereby cooling the exhaust gas. The water after absorbing heat flows back to the micro heat exchanger 10 through the water outlet pipe 12, and the heat energy is utilized through the heat exchange of the micro heat exchanger 10 for other purposes (such as heating the air conditioner, etc.). After that, the cold water returns to the cooling pipe 13 through the water inlet pipe 11 to achieve the purpose of circulating heat absorption. This can not only absorb the high-temperature heat of the exhaust gas and reduce the greenhouse effect, but also improve the utilization rate of thermal energy. Secondly, after the temperature inside the exhaust pipe is reduced, a favorable environment is also formed for the internal components, achieving multiple goals at one stroke.

[0050] The side walls of the silencer bowl 610 and the cooling tube 13 are both provided with a second silencer strip 15. By providing the second silencer strip 15, the round-trip propagation time of the sound waves between the silencer bowl 610 and the cooling tube 13 can be further delayed, thereby increasing the purpose of noise reduction.

[0051] like Figure 3 As shown, a purifier 7 is arranged between the middle exhaust pipe 2 and the tail exhaust pipe 3, and a radial annular activated carbon filter layer 71 is arranged in the purifier 7. It should be noted that the pore size of the annular activated carbon filter layer 71 decreases from the inside to the outside, and adjacent annular activated carbon filter layers 71 are separated by grilles 72. Compartments 73 are formed between the grilles 72, and zeolite is filled in the compartments 73. The purpose of setting the grid 73 is to store the zeolite in a separate space to avoid violent shaking of the zeolite due to the vibration of the exhaust pipe.

[0052] In order to improve the exhaust gas purification efficiency, we adopt a radial method, that is, the exhaust gas enters from the center of the purifier 7, and then passes through the layers of activated carbon filter layer 71 and the purification of zeolite, and finally is discharged from the outermost side of the purifier 7. Compared with the traditional linear purification structure (such as three-way catalytic converter, etc.), this method greatly increases the contact area and contact time between the exhaust gas and the purification structure per unit area, thereby greatly improving the exhaust gas purification effect.

[0053] like Figure 3 As shown, the middle exhaust pipe 2 is arranged at the innermost side of the annular activated carbon filter layer 71, the tail exhaust pipe 3 is arranged at the outermost side of the annular activated carbon filter layer 71, and the first silencer cotton 74 is arranged on the periphery of the annular activated carbon filter layer 71. The first silencer cotton 74 is arranged to enhance the noise reduction effect of the purifier 7.

[0054] like Figure 1 As shown, the rear end of the tail exhaust pipe 3 is connected to a rear noise reducer 8, and the rear end of the rear noise reducer 8 is installed with an exhaust pipe 9.

[0055] like Figure 4-5 As shown, a third noise reduction chamber 81 and a fourth noise reduction chamber 82 are respectively provided in the rear noise reducer 8, and a second noise reduction cotton 83 is provided in the third noise reduction chamber 81.

[0056] like Figure 4-5 As shown, a plurality of sound absorbing panels 84 are distributed laterally in the fourth noise reduction chamber 82 , and a sound transmission channel 85 is opened in the middle of the sound absorbing panel 84 .

[0057] like Figure 4-5 As shown, the head of the silencer protrusion 86 is located in the sound transmission channel 85 of the front sound absorbing plate 84 , and the tail cover of the silencer protrusion 86 is arranged on the sound transmission channel 85 of the rear sound absorbing plate 84 .

[0058] like Figure 4-5As shown, a sound-absorbing protrusion 86 is provided between adjacent sound-absorbing panels 84. The sound-absorbing protrusion 86 is a conical through structure, and the inner wall of the sound-absorbing protrusion 86 is symmetrically distributed with a first sound-absorbing strip 87 up and down. The length of the first sound-absorbing strip 87 increases from left to right, and the extension length of the first sound-absorbing strip 87 increases from left to right, thereby fully dispersing the sound waves entering the sound-absorbing protrusion 86.

[0059] The purpose of the rear noise reducer 8 is to further reduce the noise of the exhaust gas. The rear noise reducer 8 also adopts a layered structure, namely a third noise reduction chamber 81 and a fourth noise reduction chamber 82. The third noise reduction chamber 81 serves the purpose of preventing the propagation of sound. Specifically, it is achieved through the second noise reduction cotton 83, while the fourth noise reduction chamber 82 achieves the purpose of noise reduction by dispersing the transmission of sound waves and then weakening their kinetic energy. Specifically, when the sound waves pass through the layers of sound-absorbing panels 84, they will be dispersed by the noise-absorbing protrusions 86, so that the sound waves propagate back and forth between the layers of sound-absorbing panels 84. Furthermore, the sound waves will also propagate inside the noise-absorbing protrusions 86. Similarly, we have a first noise-absorbing strip 87 inside it, so that the sound waves propagate back and forth inside the noise-absorbing protrusions 86, thereby weakening the sound wave energy and then achieving the purpose of noise reduction.

[0060] The exhaust pipe assembly is provided with a plurality of lifting ears 14 fixed to the vehicle chassis, and the exhaust pipe assembly is fixed to the chassis via the lifting ears 14 .

[0061] Meanwhile, the contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field.

[0062] When in use, the exhaust gas in the internal combustion engine enters the three-way catalytic converter 4 through the exhaust manifold via the flange 5, undergoes preliminary filtration and purification, and then enters the front noise reducer 6 through the front exhaust pipe 1.

[0063] When the exhaust gas enters the front noise reducer 6, it first enters the vibration reduction chamber 66. After the energy absorption and vibration reduction treatment of the shock-absorbing sponge 68 and the shock-absorbing spring 69, the shaking and vibration of the exhaust pipe caused by the exhaust gas during the propagation process can be greatly reduced, thereby improving the stability of the exhaust pipe.

[0064] After that, the exhaust gas enters the second noise reduction chamber 67, and the silencer bowls 610 distributed inside it can effectively disperse the sound waves, thereby absorbing the energy of the sound waves layer by layer and reducing the noise. Furthermore, the cooling pipe 13 located between the silencer bowls 610 has two functions. First, it cools the exhaust gas and reduces the heat of the exhaust gas, thereby achieving the purpose of improving the utilization rate and reducing the greenhouse effect. Second, the tortuous structure of the cooling pipe 13 itself also forms a natural noise reduction structure, which can also disperse the sound waves. Therefore, after being processed by the front noise reducer 6, the noise of the exhaust gas is greatly weakened.

[0065] Afterwards, the exhaust gas enters the purifier 7 through the middle exhaust pipe 2, and the exhaust gas is fully treated by the internal radial filtering and purification structure, thereby reducing the pollution of the exhaust gas.

[0066] Finally, the exhaust gas enters the rear noise reducer 8 through the tail exhaust pipe 3, and the sound waves are further dispersed by the internally distributed sound-absorbing structure, namely the sound-absorbing plate 84 and the sound-absorbing protrusion 86, so as to absorb the energy of the sound waves and achieve further sound-absorbing purpose. Finally, the exhaust gas is discharged from the exhaust pipe 9. At this time, the volume and pollution degree of the exhaust gas are greatly weakened, which basically meets the market requirements.

[0067] In order to further prove the reliability of this product, we have done some experimental tests to verify the noise reduction performance of this product. Please refer to the figure below for specific data;

[0068]

[0069] It should be noted that, No. 1-2 are exhaust pipes without any noise reduction treatment, No. 3-4 are ordinary noise reduction exhaust pipes currently on the market, and No. 5-7 are this product. For this test, we selected three types of test vehicles, namely trucks, large passenger cars and family cars. From the above table data, it can be seen that the decibel values ​​of the three types of vehicles No. 1-2 are approximately in the range of 90, 85 and 70 decibels, respectively. That is to say, the noise of these three types of vehicles without any noise reduction treatment is obviously a noise pollution phenomenon. Even for family cars, the decibel value is as high as 70 decibels, the decibel values ​​of the three types of vehicles measured by No. 3-4 are approximately in the range of 70, 65 and 50 decibels respectively. It can be seen that the decibel value of the exhaust pipe after noise reduction treatment has been significantly reduced. The decibel values ​​of the three types of vehicles measured by No. 5-7 are approximately in the range of 60, 53 and 40 decibels respectively. It can be seen that the noise reduction effect of this product is significantly improved compared with the ordinary noise reduction exhaust pipes on the market, especially for family cars. After using this product, the "noise-free" effect is basically achieved.

[0070] It should be noted that the electrical components appearing in this article are all connected to the external main controller and 220V or 380V mains electricity, and the main controller can be a conventional known device for controlling computers, etc. Its control principle, internal structure and control switch mode are all conventional means of the prior art, which are directly quoted here without further elaboration. In this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A noise-reducing and environment-friendly vehicle exhaust pipe assembly, characterized in that: It comprises a front exhaust pipe (1), a middle exhaust pipe (2) and a rear exhaust pipe (3); The front end of the front exhaust pipe (1) is connected to a three-way catalytic converter (4), and the front end of the three-way catalytic converter (4) is connected to a flange (5), and the flange (5) is connected to an external exhaust manifold; A front noise reducer (6) is arranged between the front exhaust pipe (1) and the middle exhaust pipe (2), and a heat exchange system is arranged on the front noise reducer (6); The inner layer of the front noise reducer (6) is provided with a honeycomb conductive plate (65), and the honeycomb conductive plate (65) divides the inner layer space into a vibration reduction chamber (66) and a second noise reduction chamber (67); A vibration-damping sponge (68) is arranged in the vibration-damping chamber (66), and a vibration-damping spring (69) is embedded in the vibration-damping sponge (68); A plurality of silencer bowls (610) are distributed laterally in the second noise reduction chamber (67), and the silencer bowls (610) are in a lateral "eight" shape, with a sound transmission channel reserved in the middle thereof; The heat exchange system comprises a micro heat exchanger (10), a water inlet pipe (11), a cooling pipe (13), and a water outlet pipe (12), wherein the cooling pipe (13) is arranged in the second noise reduction chamber (67) and is laid in a circuitous manner in the gap between the silencer bowls (610); The water inlet of the cooling pipe (13) is connected to the micro heat exchanger (10) through the water inlet pipe (11), and the water outlet of the cooling pipe (13) is connected to the micro heat exchanger (10) through the water outlet pipe (12); The side walls of the muffler bowl (610) and the cooling pipe (13) are both provided with a second muffler strip (15). A purifier (7) is provided between the middle exhaust pipe (2) and the rear exhaust pipe (3); The rear end of the tail exhaust pipe (3) is connected to a rear noise reducer (8), and the rear end of the rear noise reducer (8) is installed with an exhaust pipe (9); A third noise reduction chamber (81) and a fourth noise reduction chamber (82) are respectively arranged in the rear noise reduction device (8), and a second noise reduction cotton (83) is arranged in the third noise reduction chamber (81); A plurality of sound absorbing panels (84) are distributed laterally in the fourth noise reduction chamber (82), and a sound transmission channel (85) is provided in the middle of the sound absorbing panel (84); A sound-absorbing protrusion (86) is arranged between adjacent sound-absorbing panels (84), the head of the sound-absorbing protrusion (86) is located in the sound transmission channel (85) of the front sound-absorbing panel (84), and the tail cover of the sound-absorbing protrusion (86) is arranged on the sound transmission channel (85) of the rear sound-absorbing panel (84); The exhaust pipe assembly is provided with a plurality of lifting ears (14) fixed to the vehicle chassis.

2. The noise-reducing and environment-friendly vehicle exhaust pipe assembly according to claim 1, characterized in that: The outer layer of the front noise reducer (6) is provided with a first noise reduction chamber (61), and glass wool (62), ceramic fiber wool (63) and a honeycomb vibration reduction layer (64) are distributed in the first noise reduction chamber (61) from the outside to the inside.

3. The noise-reducing and environment-friendly vehicle exhaust pipe assembly according to claim 1, characterized in that: The purifier (7) is provided with a radial annular activated carbon filter layer (71), the pore size of the annular activated carbon filter layer 71 decreases from the inside to the outside, adjacent annular activated carbon filter layers (71) are separated by grids (72), compartments (73) are formed between the grids (72), and the compartments (73) are filled with carnosite; The middle exhaust pipe (2) is arranged at the innermost side of the annular activated carbon filter layer (71), and the tail exhaust pipe (3) is arranged at the outermost side of the annular activated carbon filter layer (71).

4. The noise-reducing and environment-friendly vehicle exhaust pipe assembly according to claim 3 is characterized by: A first sound-absorbing cotton (74) is arranged on the periphery of the annular activated carbon filter layer (71).

5. The noise-reducing and environment-friendly vehicle exhaust pipe assembly according to claim 1, characterized in that: The noise-absorbing protrusion (86) is a conical through-structure, and the inner wall of the noise-absorbing protrusion (86) is symmetrically distributed with first noise-absorbing strips (87) in the upper and lower parts.

6. The noise-reducing and environment-friendly vehicle exhaust pipe assembly according to claim 5, characterized in that: The length of the first sound-absorbing strip (87) increases from left to right, and the extension length of the first sound-absorbing strip (87) increases from left to right, thereby fully dispersing the sound waves entering the sound-absorbing protrusion (86).

Images