Automobile muffler module

Abstract

The utility model discloses an automobile silencer module relates to the technical field of automobile silencer, it includes the shell, and the air inlet end intercommunication of shell has the connecting pipeline, and the one end fixed intercommunication of connecting pipeline is away from the shell has the air inlet pipeline, and the air inlet pipeline is fixed intercommunication with automobile exhaust pipe, and the air outlet end integral intercommunication of connecting pipeline has the flow guide pipe, and is provided with the hole on the flow guide pipe, and the one end fixed intercommunication of flow guide pipe is away from the air outlet pipeline of connecting pipeline, and the air outlet pipeline's air outlet end extends to the outside of shell, and the outside of flow guide pipe is fixedly connected with the baffle along the vertical direction, and the baffle divides the inside space of shell into first cavity and second cavity, and the outside of shell is provided with mounting part, and mounting part is connected with the automobile dismounting. The automobile silencer module has played the resistance and the resistance silencing advantage, has realized the high -efficient suppression to the exhaust broadband noise, has guaranteed low exhaust back pressure simultaneously, thereby has improved the engine efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive muffler technology, specifically an automotive muffler module. Background Technology

[0002] With the rapid development of the automotive industry and the continuous growth of motor vehicle ownership, vehicle noise pollution has become an important part of urban environmental problems. Engine exhaust noise is one of the main noise sources during vehicle operation. It has a wide frequency spectrum and high sound pressure level, especially in the low frequency range, which not only interferes with driving comfort but also seriously affects the quality of life and physical and mental health of residents around the road.

[0003] As the core noise reduction component of the exhaust system, the performance of the muffler directly affects whether the overall vehicle noise level meets the standards, and also has a significant impact on the engine's exhaust back pressure and power performance.

[0004] Traditional automotive mufflers can be broadly classified into two categories based on their noise reduction principles: resistive mufflers and reactive mufflers. Resistive mufflers rely on porous sound-absorbing materials laid inside to dissipate sound energy, and are highly effective against mid-to-high frequency noise. However, they are prone to material aging and pulverization failure under high temperature and high-speed airflow, and may also produce particulate matter emissions. Reactive mufflers, on the other hand, are based on abrupt changes in pipe cross-section or a side-branch resonant cavity structure, utilizing the principles of sound wave reflection and interference to eliminate noise at specific frequencies. They are particularly good at suppressing low-frequency noise, but their noise reduction bandwidth is usually narrow, and improper design can lead to excessive exhaust back pressure, reducing engine efficiency.

[0005] Therefore, in response to the above problems, the applicant needs to design an automotive muffler module to solve the problem. Utility Model Content

[0006] The purpose of this invention is to provide an automotive muffler module to solve the problems mentioned in the background section.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an automotive muffler module, comprising a housing, wherein the air inlet end of the housing is connected to a connecting pipe, the end of the connecting pipe away from the housing is fixedly connected to an air intake pipe, and the air intake pipe is fixedly connected to an automotive exhaust pipe, the air outlet end of the connecting pipe is integrally connected to a guide pipe, and the guide pipe is provided with a hole, the end of the guide pipe away from the connecting pipe is fixedly connected to an air outlet pipe, and the air outlet end of the air outlet pipe extends to the outside of the housing, the outside of the guide pipe is fixedly connected to a baffle plate in a vertical direction, and the baffle plate divides the inner space of the housing into a first cavity and a second cavity, and the outside of the housing is provided with a mounting component, and the mounting component is detachably connected to the automotive.

[0008] Furthermore, the mounting component includes a mounting ring disposed on the outer side of the housing, and an extension plate integrally disposed on the mounting ring. The extension plate is provided with a threaded rod, and a nut is threaded onto the threaded rod. The extension plate is connected to the vehicle through the threaded rod and the nut.

[0009] Through the above structural design, the mounting components adopt a threaded connection method, which facilitates the quick installation and fixation of the muffler module and improves assembly efficiency.

[0010] Furthermore, the barrier plate is an arc-shaped plate with its concave surface facing the direction of the air intake pipe.

[0011] Through the above structural design, the baffle plate adopts an arc shape and faces the direction of the air intake pipe, which can effectively guide the airflow and optimize the sound wave reflection path, thereby enhancing the low-frequency noise reduction effect.

[0012] Furthermore, the inner wall of the outer shell is bonded with a high-temperature resistant sound-absorbing material in the first cavity area.

[0013] Through the above structural design, high-temperature resistant sound-absorbing material is pasted into the first cavity, which can maintain sound absorption performance in high-temperature environments and improve the absorption capacity of mid-to-high frequency noise.

[0014] Furthermore, the outlet end of the air outlet pipe is bent downwards.

[0015] The downward bend in the exhaust pipe, as described above, prevents rainwater or foreign objects from flowing back into the muffler, thus enhancing the system's durability.

[0016] Furthermore, the outer surface of the outer casing is coated with a high-temperature resistant and corrosion-resistant coating.

[0017] Through the above structural design, the outer shell surface is coated with a high-temperature resistant and corrosion-resistant coating, which significantly improves the muffler's corrosion resistance and service life in harsh environments.

[0018] Furthermore, the guide tube has a double-layer composite structure, including an inner tube and an outer tube sleeved outside the inner tube.

[0019] Through the above structural design, the guide tube adopts a double-layer composite structure, combining a reactive structure and a resistive sound-absorbing layer to achieve efficient suppression of broadband noise.

[0020] Furthermore, the inner tube is made of high-temperature resistant stainless steel, the outer tube is made of sound-absorbing material, and sound-absorbing cotton is filled between the inner and outer tubes.

[0021] Through the above structural design, the inner stainless steel tube ensures structural strength and high temperature resistance, while the outer sound-absorbing material and sound-absorbing cotton work together to enhance the absorption effect of mid-to-high frequency noise.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] This automotive muffler module features installation components that ensure convenient and reliable installation, removal, and fixation. The arc-shaped baffle optimizes airflow and sound wave paths, enhancing low-frequency noise reduction. The high-temperature resistant sound-absorbing material in the first cavity effectively absorbs mid-to-high frequency noise, while the high-temperature resistant and corrosion-resistant coating on the outer shell enhances environmental durability. The dual-layer composite structure of the guide tube works synergistically to efficiently dissipate broadband sound wave energy. Ultimately, while ensuring low exhaust back pressure and engine power, it achieves comprehensive and long-lasting efficient suppression of broadband exhaust noise, thereby improving engine efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the inner side structure of the outer shell of this utility model;

[0026] Figure 3 This is a three-dimensional structural diagram of the mounting components of this utility model;

[0027] Figure 4 This is a schematic diagram of the layered structure of the guide tube of this utility model.

[0028] In the diagram: 1. Outer shell; 2. Mounting components; 10. Connecting pipe; 11. Inlet pipe; 12. Guide pipe; 13. Hole; 14. Barrier plate; 15. First cavity; 16. Second cavity; 17. Outlet pipe; 20. Mounting ring; 21. Extension plate; 22. Threaded rod; 23. Nut; 121. Inner tube; 122. Outer tube; 123. Sound-absorbing cotton. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figures 1-4As shown, this utility model discloses an automotive muffler module, including a housing 1, with a connecting pipe 10 connected to the air inlet end of the housing 1. An air inlet pipe 11 is fixedly connected to the end of the connecting pipe 10 away from the housing 1, and the air inlet pipe 11 is fixedly connected to the automotive exhaust pipe. A guide pipe 12 is integrally connected to the air outlet end of the connecting pipe 10, and a hole 13 is provided on the guide pipe 12. An air outlet pipe 17 is fixedly connected to the end of the guide pipe 12 away from the connecting pipe 10, and the air outlet end of the air outlet pipe 17 extends to the outside of the housing 1. A baffle plate 14 is fixedly connected to the outside of the guide pipe 12 in a vertical direction, and the baffle plate 14 divides the inner space of the housing 1 into a first cavity 15 and a second cavity 16. An installation component 2 is provided on the outside of the housing 1, and the installation component 2 is detachably connected to the automotive.

[0031] Mounting component 2 includes a mounting ring 20 disposed on the outside of housing 1, and an extension plate 21 integrally disposed on the mounting ring 20. The extension plate 21 is provided with a threaded rod 22, and a nut 23 is threaded on the threaded rod 22. The extension plate 21 is connected to the vehicle through the threaded rod 22 and the nut 23. The muffler module is firmly fixed to the predetermined position on the vehicle body by bolt connection. The extension plate 21 provides sufficient installation freedom to adapt to different vehicle body layout spaces, ensures the stability of the muffler connection in the long-term vibration environment of the vehicle, and simplifies the installation and disassembly process.

[0032] The baffle plate 14 is an arc-shaped plate with its concave surface facing the air intake pipe 11. It can smoothly guide the high-speed exhaust airflow, avoid generating turbulence or vortices to reduce airflow regeneration noise. At the same time, its arc-shaped surface can focus and directionally reflect sound waves, accurately guiding sound waves to the surface of the sound-absorbing material of the first cavity 15 or causing them to interfere and cancel each other out more effectively in the second cavity 16. This enhances the suppression effect on low-frequency roaring noise and improves the performance of resistance noise reduction.

[0033] The inner wall of the outer shell 1 is bonded with high-temperature resistant sound-absorbing material in the first cavity 15 area, making the first cavity 15 a composite noise reduction unit. It retains the characteristics of resistive noise reduction through cavity reflection and introduces the mechanism of resistive noise reduction through porous material to dissipate sound energy, ensuring the continuous and stable absorption capability of the muffler for mid-to-high frequency noise throughout its entire life cycle, and effectively broadening the frequency range of overall noise reduction.

[0034] The outlet end of the exhaust pipe 17 is bent downwards, which can utilize the principle of gravity to effectively prevent rainwater, melted snow water, and dust and impurities raised from the road from flowing back into the muffler through the outlet when the vehicle is turned off or in the external environment.

[0035] The outer surface of the housing 1 is coated with a high-temperature resistant and corrosion-resistant coating. The coating protects the muffler module from the harsh working environment and resists the heat radiation from the high-temperature exhaust gas inside, the continuous baking from the engine compartment, and the impact of gravel, salt spray, moisture and chemical corrosion from the external road surface, thereby extending the service life of the muffler assembly.

[0036] The guide tube 12 has a double-layer composite structure, including an inner tube 121 and an outer tube 122 sleeved outside the inner tube 121. Sound waves enter the guide tube 12 through the hole 13, and their energy is consumed by the material of the outer tube 122, thus achieving comprehensive and efficient attenuation of low-frequency, mid-frequency and high-frequency broadband noise.

[0037] The inner tube 121 is made of high-temperature resistant stainless steel, and the outer tube 122 is made of sound-absorbing material. Sound-absorbing cotton 123 is filled between the inner tube 121 and the outer tube 122. The inner tube 121 is made of high-temperature resistant stainless steel and is in direct contact with high-temperature, high-speed exhaust gas that may contain corrosive particles, ensuring the structural integrity, heat resistance and corrosion resistance of the flow channel. The outer tube 122 is made of porous sound-absorbing material and together with the sound-absorbing cotton 123 filling it, it forms a highly efficient resistive sound-absorbing sleeve. This allows the flow guide tube 12 to withstand harsh working conditions while maximizing the absorption of broadband noise in the mid-to-high frequency range on its periphery, converting energy into heat energy dissipation through friction, and improving the overall sound absorption efficiency.

[0038] When using this automotive muffler module, the high-temperature exhaust gas from the engine first enters the guide pipe 12 through the intake pipe 11 and the connecting pipe 10. Some of the sound wave energy leaks through the holes 13 on the guide pipe 12 into its inner tube 121, outer tube 122 and sound-absorbing cotton 123, where it is dissipated by the sound-absorbing material. Subsequently, the airflow and the remaining sound waves are reflected, expanded, contracted and interfered in the first cavity 15 and the second cavity 16 formed by the arc-shaped baffle plate 14, thereby effectively eliminating low-frequency noise. After multiple energy attenuations, the exhaust gas is finally discharged through the exhaust pipe 17, achieving efficient suppression of wideband exhaust noise while ensuring a low exhaust back pressure.

[0039] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An automotive muffler module, characterized by, The device includes an outer shell (1), and the air inlet end of the outer shell (1) is connected to a connecting pipe (10). The end of the connecting pipe (10) away from the outer shell (1) is fixedly connected to an air inlet pipe (11), and the air inlet pipe (11) is fixedly connected to the exhaust pipe of the car. The air outlet end of the connecting pipe (10) is integrally connected to a guide pipe (12), and the guide pipe (12) is provided with a hole (13). The end of the guide pipe (12) away from the connecting pipe (10) is fixedly connected to an air outlet pipe (17), and the air outlet end of the air outlet pipe (17) extends to the outside of the outer shell (1). The outside of the guide pipe (12) is fixedly connected to a baffle plate (14) in the vertical direction, and the baffle plate (14) divides the inner space of the outer shell (1) into a first cavity (15) and a second cavity (16). The outside of the outer shell (1) is provided with an installation component (2), and the installation component (2) is detachably connected to the car.

2. The automotive muffler module according to claim 1, characterized in that: The mounting component (2) includes a mounting ring (20) disposed on the outside of the housing (1), and an extension plate (21) integrally disposed on the mounting ring (20). A threaded rod (22) is disposed on the extension plate (21), and a nut (23) is threaded on the threaded rod (22). The extension plate (21) is connected to the vehicle through the threaded rod (22) and the nut (23).

3. The automotive muffler module according to claim 1, characterized in that: The barrier plate (14) is an arc-shaped plate with its concave surface facing the air intake pipe (11).

4. The automotive muffler module according to claim 1, characterized in that: The inner wall of the outer shell (1) is bonded with high-temperature resistant sound-absorbing material in the first cavity (15) area.

5. The automotive muffler module according to claim 1, characterized in that: The outlet end of the air outlet pipe (17) is bent downwards.

6. The automotive muffler module according to claim 1, characterized in that: The outer surface of the outer shell (1) is coated with a high-temperature resistant and corrosion-resistant coating.

7. The automotive muffler module according to claim 1, characterized in that: The guide tube (12) has a double-layer composite structure, including an inner tube (121) and an outer tube (122) sleeved outside the inner tube (121).

8. The automotive muffler module according to claim 7, characterized in that: The inner tube (121) is made of high-temperature resistant stainless steel, the outer tube (122) is made of sound-absorbing material, and sound-absorbing cotton (123) is filled between the inner tube (121) and the outer tube (122).

Images