Exhaust system and vehicle

Abstract

The utility model relates to the field of vehicle exhaust, and provides an exhaust system and a vehicle. The exhaust system comprises a silencing device and a purification device. Wherein a first silencing cavity and a second silencing cavity are formed in the silencing device, and the purification device is arranged in the first silencing cavity; an air inlet pipe of the silencing device is communicated with the air inlet end of the purification device, the air outlet end of the purification device and the air outlet pipe of the silencing device are both communicated with the second silencing cavity, and the air inlet end and / or the air outlet end of the purification device are / is communicated with the first silencing cavity. According to the exhaust system, exhaust gas can be purified, the purified exhaust gas is subjected to noise elimination treatment, the good noise elimination and reduction effect is achieved, and the quality of the whole vehicle can be improved.

Description

Exhaust system and vehicle Technical Field

[0001] This application relates to the field of vehicle exhaust, and particularly to an exhaust system and a vehicle. Background Technology

[0002] In a vehicle, the exhaust system is a combination of devices used to collect and discharge exhaust gases. It generally includes components such as an exhaust pipe, a muffler, and a purification device. The exhaust pipe guides the flow of exhaust gases, allowing them to be discharged to the outside after being silenced by the muffler and purified by the purification device. Generally, in existing vehicles, the exhaust system has the purification device and muffler arranged separately, connected by pipes. However, this arrangement occupies too much space on the vehicle chassis, which is not conducive to the arrangement of other structures on the chassis.

[0003] Therefore, some exhaust systems integrate the purification device into the muffler to reduce space occupation. However, while integrating the muffler reduces space occupation, insufficient structural layout can lead to weak noise reduction effect, which is detrimental to improving the overall quality of the vehicle. Summary of the Invention

[0004] In view of this, this application aims to propose an exhaust system that can help improve the overall quality of a vehicle.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0006] An exhaust system is applied to a vehicle, and the exhaust system includes a muffler for muffler treatment and a purification device for purifying the exhaust. The muffler has a first muffler cavity and a second muffler cavity, and the purification device is disposed in the first muffler cavity.

[0007] The air inlet pipe of the silencer is connected to the air inlet end of the purification device, the air outlet end of the purification device and the air outlet pipe of the silencer are both connected to the second silencer cavity, and the air inlet end and / or the air outlet end of the purification device are connected to the first silencer cavity.

[0008] Furthermore, the purification device divides the first silencing cavity into a first sub-cavity and a second sub-cavity; the first sub-cavity is connected to the air inlet, and the second sub-cavity is connected to the air outlet.

[0009] Furthermore, the purification device includes a first purification unit and a second purification unit arranged sequentially along the exhaust gas flow direction; one of the first purification unit and the second purification unit includes a catalyst, and the other of the first purification unit and the second purification unit includes a particulate filter.

[0010] Furthermore, the second silencing cavity includes a plurality of sub-cavities arranged in series; the plurality of sub-cavities are arranged sequentially along the exhaust airflow direction, and the sub-cavity located at the first end is connected to the exhaust end through a first conduit, and the sub-cavity located at the end is connected to the exhaust pipe through a second conduit.

[0011] Furthermore, the plurality of sub-cavities include a first sub-cavity, a third sub-cavity, and a fourth sub-cavity arranged sequentially along the exhaust airflow direction; the first conduit passes through the fourth sub-cavity and the third sub-cavity sequentially and communicates with the first sub-cavity, and the second conduit passes through the first sub-cavity and the third sub-cavity sequentially and communicates with the fourth sub-cavity.

[0012] Furthermore, the first conduit is provided with a first through hole that communicates with the fourth sub-cavity.

[0013] Furthermore, a second sub-cavity is provided between the first sub-cavity and the third sub-cavity; a third conduit is provided in the second sub-cavity, the first sub-cavity and the third sub-cavity are connected through the third conduit, and the third conduit is provided with a second through hole communicating with the second sub-cavity.

[0014] Furthermore, the first conduit passes through the second sub-cavity, and the first conduit is provided with a third through hole communicating with the second sub-cavity; and / or, the second sub-cavity is provided with sound-absorbing material.

[0015] Furthermore, the fourth sub-cavity is located at one end of the silencing device, the first silencing cavity, and the first, second, and third sub-cavities are located on the same side of the fourth sub-cavity, and the first, second, and third sub-cavities are located on the same side of the first silencing cavity.

[0016] Compared with related technologies, this application has the following advantages:

[0017] (1) The exhaust system described in this application can achieve integrated design by setting the purification device in the first housing of the muffler, thereby reducing space occupation. At the same time, the first muffler can be used to muffle the exhaust gas before and after purification. Combined with the synergistic effect of the first muffler and the second muffler, a better noise reduction effect can be achieved. While reducing space occupation and facilitating the arrangement of other components of the vehicle chassis, the noise reduction effect of the exhaust system is also guaranteed, which can help improve the overall quality of the vehicle.

[0018] (2) By setting the first chamber, it is beneficial to silence the exhaust gas entering the purification device, and by setting the second chamber, it is beneficial to silence the exhaust gas discharged from the purification device, thereby achieving noise reduction treatment before and after exhaust purification, so as to improve the overall noise reduction effect of the exhaust system.

[0019] (3) By setting up the first purification unit and the second purification unit, it is beneficial to purify the waste gas, and the first purification unit and the second purification unit are respectively catalyst and particulate trap, which is beneficial to improve the purification effect and facilitates the design and implementation.

[0020] (4) By connecting multiple sub-cavities in series, the flow area of ​​exhaust gas in the second silencing cavity is separated, and the sub-cavity at the first end is connected to the outlet end through the first conduit, and the sub-cavity at the end is connected to the outlet pipe through the second conduit. This facilitates the exhaust gas flow through each sub-cavity and discharges, increases the silencing path, and thus helps to improve the silencing effect of the second silencing cavity, and also helps in the design and implementation of the second silencing cavity.

[0021] (5) By setting up the first sub-cavity, the third sub-cavity and the fourth sub-cavity, the exhaust gas is discharged after passing through the first sub-cavity, the third sub-cavity and the fourth sub-cavity. The first duct and the second duct are both located in the second silencing cavity, which can help improve the noise reduction effect of the second silencing cavity. The structure is simple and easy to design and implement.

[0022] (6) By setting the first through hole, the first conduit and the fourth sub-cavity can be connected, which facilitates the silencing function of the fourth sub-cavity on exhaust gas by achieving a longer silencing path.

[0023] (7) By setting the second sub-cavity, the silencing path in the second silencing cavity is increased, which is conducive to improving the silencing and noise reduction effect of the second silencing cavity. By setting the third conduit, it is easy to realize the connection between the first sub-cavity and the third sub-cavity. The setting of the second through hole on the third conduit is conducive to realizing the silencing function of the second sub-cavity.

[0024] (8) By providing a third through hole on the first conduit that communicates with the second sub-cavity, it is easier to realize the sound absorption function of the second sub-cavity. The setting of sound-absorbing material helps to improve the sound absorption and noise reduction effect of the second sub-cavity, which is conducive to design and implementation.

[0025] (9) By placing the first silencing cavity, as well as the first sub-cavity, the second sub-cavity and the third sub-cavity on the same side of the fourth sub-cavity, and placing the first sub-cavity, the second sub-cavity and the third sub-cavity on the same side of the first silencing cavity, it is not only beneficial to realize the integrated design of the exhaust system and improve its structural compactness, but also to extend the silencing path and improve the silencing and noise reduction effect.

[0026] This application also proposes a vehicle that includes the exhaust system described above.

[0027] The vehicle described in this application, through the above-mentioned exhaust system configuration, helps to purify and reduce the noise of the vehicle's exhaust, thereby improving the overall noise reduction effect of the vehicle. Furthermore, integrating the purification device into the muffler can also reduce the space occupied by the exhaust system in the overall vehicle layout, which is conducive to improving the overall vehicle quality. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 is a schematic diagram of the exhaust system described in an embodiment of this application;

[0030] Figure 2 is a schematic diagram of the internal structure of the exhaust system described in the embodiment of this application from a first angle;

[0031] Figure 3 is a schematic diagram of the internal structure of the exhaust system described in the embodiment of this application from a second angle;

[0032] Figure 4 is a side view of the exhaust system described in an embodiment of this application;

[0033] Figure 5 is a cross-sectional view at point AA in Figure 4;

[0034] Figure 6 is a schematic diagram of the exhaust gas flow direction of the exhaust system described in the embodiment of this application;

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Silencing device;

[0037] 101. First anechoic chamber;

[0038] 101a, First chamber; 101b, Second chamber;

[0039] 102. Second anechoic chamber;

[0040] 102a, First sub-cavity; 102b, Second sub-cavity; 102c, Third sub-cavity; 102d, Fourth sub-cavity;

[0041] 1021. Partition; 1022. Connecting hole; 1023. First conduit; 1024. Second conduit; 1025. Third conduit; 1026. First through hole; 1027. Second through hole; 1028. Third through hole;

[0042] 2. Purification device;

[0043] 201. Air inlet; 202. Air outlet; 203. First purification unit; 204. Second purification unit;

[0044] 3. Air intake pipe;

[0045] 4. Air outlet pipe. Detailed Implementation

[0046] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0047] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0048] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0050] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0052] The first aspect of this application provides an exhaust system for use in a vehicle, primarily for purifying vehicle exhaust and reducing vehicle exhaust noise. Furthermore, the exhaust system of this embodiment, through its structural innovation, integrates the purification device 2 into the muffler device 1, thereby improving the noise reduction effect of the muffler device 1 while reducing space occupation, thus contributing to improving vehicle quality.

[0053] In related technologies, with the increase in vehicle ownership, the requirements for vehicle performance are also increasing. Noise reduction performance is an important standard for measuring vehicle performance. Besides external noise generated during driving, the noise generated by the vehicle itself also affects its performance. In particular, the noise generated by the vehicle's exhaust system is crucial for reducing exhaust noise.

[0054] Generally speaking, a vehicle's exhaust system mainly includes an exhaust pipe, a muffler, and a purification device 2. The exhaust pipe is used to guide the exhaust airflow, the muffler is used to reduce exhaust noise, and the purification device 2 is used to purify harmful substances in the exhaust. The muffler is connected in series with the exhaust pipe and the purification device 2. This separate arrangement takes up more space on the vehicle chassis and is not conducive to the arrangement of other structures on the vehicle chassis.

[0055] Therefore, in some related technologies, the purification device 2 is integrated into the muffler in some exhaust systems to reduce space occupation. However, while integrating the purification device 2 into the muffler can reduce space occupation, it also suffers from insufficient structural layout, resulting in a weaker noise reduction effect of the exhaust system, which is detrimental to improving vehicle quality.

[0056] In view of this, in order to overcome the shortcomings of the related technologies, the exhaust system of this embodiment, as shown in Figures 1 to 6, includes a muffler 1 and a purification device 2 in its overall design.

[0057] The silencer 1 includes a first silencer cavity 101 and a second silencer cavity 102, and the purification device 2 is located in the first silencer cavity 101. The air inlet pipe 3 of the silencer 1 is connected to the air inlet end 201 of the purification device 2, and the air outlet end 202 of the purification device 2 and the air outlet pipe 4 of the silencer 1 are both connected to the second silencer cavity 102. The air inlet end 201 and the air outlet end 202 of the purification device 2 are connected to the first silencer cavity 101.

[0058] Therefore, by placing the purification device 2 inside the first housing of the muffler device 1, an integrated design can be achieved, reducing space occupation. At the same time, the first muffler chamber 101 can be used to muffle the exhaust gas before and after purification. Combined with the synergistic effect of the first muffler chamber 101 and the second muffler chamber 102, a better noise reduction effect can be achieved. While reducing space occupation and facilitating the arrangement of other components of the vehicle chassis, it also ensures the noise reduction effect of the exhaust system, which is conducive to improving the driving experience of the vehicle.

[0059] Based on the above general introduction, specifically, in some exemplary embodiments, the silencing device 1 in this embodiment, as shown in Figures 1 to 3, generally includes a housing, an air inlet pipe 3, and an air outlet pipe 4.

[0060] The aforementioned housing serves as the outer shell of the overall silencing device 1, and an internal cavity is formed therein. The exhaust noise is reduced by the flow of exhaust gas within the cavity. The aforementioned housing is typically made of steel sheet (preferably stainless steel), and its interior is usually equipped with silencing structures such as pipes, baffles, or sound-absorbing materials to reduce exhaust noise through the reflection and interference of sound waves.

[0061] The intake pipe 3 described above serves as the intake pipe for the integrated muffler 1, connecting to the exhaust pipe in the vehicle to guide exhaust gases from the exhaust pipe into the muffler 1. The connection between the intake pipe 3 and the exhaust pipe can refer to conventional connection methods in existing vehicles (such as flange bolt connections), and will not be elaborated further here.

[0062] The above-mentioned exhaust pipe 4 serves as the exhaust pipe 4 of the overall muffler 1, used to discharge the gas treated by the muffler 1, and the gas discharged through the exhaust pipe 4 is generally referred to as "vehicle exhaust".

[0063] It is worth noting that, to ensure exhaust performance, in some exemplary embodiments, an extension pipe can be installed on the exhaust pipe 4 to adjust the exhaust position. Specifically, the extension pipe is typically arranged along the front-to-rear direction of the vehicle at the bottom. However, besides installing an extension pipe on the exhaust pipe 4, in some embodiments, based on the overall vehicle design requirements, multiple extension pipes can be installed while meeting exhaust requirements.

[0064] Referring to Figures 1 to 5, in some exemplary embodiments, this embodiment may, for example, place the purification device 2 within the first silencing cavity 101 and divide the first silencing cavity 101 into a first sub-cavity 101a and a second sub-cavity 101b, with the first sub-cavity 101a connected to the air inlet 201 and the second sub-cavity 101b connected to the air outlet 202.

[0065] It should be noted that the outer shell of the purification device 2 and the inner wall of the first silencer can be integrated into one unit. Furthermore, both the air inlet 201 and the air outlet 202 of the purification device 2 are conical. This facilitates the formation of a first chamber 101a and a second chamber 101b using the outer shell of the purification device 2 and the inner wall of the first silencer, thereby ensuring the effectiveness of the first silencer chamber 101.

[0066] The first chamber 101a facilitates the silencing of exhaust gas entering the intake end 201, while the second chamber 101b facilitates the silencing of exhaust gas exiting the outlet end 202. This achieves silencing and noise reduction before and after exhaust purification, thereby improving the overall silencing and noise reduction effect of the exhaust system. In addition, the first chamber 101a and the second chamber 101b have the advantages of simple structure and easy design and implementation.

[0067] Furthermore, it is worth noting that both the air inlet 201 and the air outlet 202 of the purification device 2 are provided with micro-perforated structures. Micro-perforated structures typically refer to perforated structures with pore sizes in the micrometer range (generally 50–500 μm) and small pore spacing, commonly found in acoustic materials or silencing devices (such as micro-perforated plate silencers). It can be understood that the micro-perforated structures facilitate the connection between the air inlet 201 and the first chamber 101a, and between the air outlet 202 and the second chamber 101b, thereby facilitating the silencing function of both chambers 101a and 101b.

[0068] It should be noted that when the exhaust gas flows through the purification device 2, some sound waves will pass through the micro-perforated structure and enter the first chamber 101a. Since the first chamber 101a and the second chamber 101b are closed, these sound waves will be confined within the first chamber 101a and the second chamber 101b, thus reducing the sound waves of the exhaust gas and silencing the sound. At the same time, the sound waves entering the first chamber 101a and the second chamber 101b will collide and rub against the inner walls of the first chamber 101a and the second chamber 101b. During friction, the energy of the sound waves is consumed, and the sound waves will also be reflected continuously during the collision, causing the sound waves to collide with each other and consume the energy of the sound waves. Furthermore, when two sound waves of the same frequency but opposite propagation directions meet, the two sound waves will cancel each other out. In this way, the sound waves confined within the first chamber 101a and the second chamber 101b will gradually decrease until they disappear.

[0069] It is worth mentioning that, in specific implementation, the porosity of the above-mentioned micro-perforated structure can be, for example, between 1% and 15%. It is understood that setting the porosity of the micro-perforated structure between 1% and 15% can increase the sound absorption effect, thus facilitating improved noise reduction. The pore shape of the above-mentioned micro-perforated structure can be, for example, circular, polygonal, or elliptical. Of course, in addition to setting the pore shape to circular, polygonal, or elliptical, other shapes can also be set, such as triangles, irregular quadrilaterals, etc., as long as they meet the requirements for the micro-perforated structure in the noise reduction system. Furthermore, the way the above-mentioned micro-perforated structure is set at the air inlet 201 and air outlet 202 of the purification device 2 can also refer to the method of setting micro-perforated structures on pipelines in existing vehicles, which will not be elaborated here.

[0070] In practical implementation, the arrangement, porosity, and pore shape of the micro-perforated structure can be arranged according to actual design needs, so that only sound waves of specific frequency bands can pass through the micro-perforated structure and enter the first cavity 101a and the second cavity 101b. In this way, the sound waves of specific frequency bands can be filtered by the first cavity 101a and the second cavity 101b, which is conducive to the realization of the noise reduction effect of the first cavity 101a and the second cavity 101b.

[0071] Continuing with reference to Figures 1 to 5, in some of the exemplary embodiments, this embodiment may, for example, include a first purification unit 203 and a second purification unit 204 disposed within a housing.

[0072] The first purification unit 203 and the second purification unit 204 are arranged sequentially along the exhaust gas flow direction, and one of the first purification unit 203 and the second purification unit 204 includes a catalyst, while the other of the first purification unit 203 and the second purification unit 204 includes a particulate filter.

[0073] The above-mentioned first purification unit 203 and second purification unit 204 can facilitate the purification of waste gas, and make the first purification unit 203 and the second purification unit 204 a catalyst and a particulate filter, respectively, which can improve the purification effect and facilitate the design and implementation.

[0074] In some exemplary embodiments, the first anechoic chamber 101 may be provided with one or more of the following, such as an oxygen sensor interface, a temperature sensor interface, and an air intake pipe interface.

[0075] In practical implementation, the first purification unit 203 and the second purification unit 204 are arranged at intervals within the housing, and a spacer cavity is formed between the first purification unit 203 and the second purification unit 204 within the housing. The housing is provided with air intake pipe interfaces respectively connecting the spacer cavity and the second sub-cavity 101b, and oxygen sensor interfaces respectively connecting the air inlet pipe 3 and the spacer cavity. Each air intake pipe interface is connected to an air intake pipe, the other end of which is typically connected to a pressure detection device (e.g., a pressure sensor). Each oxygen sensor interface is connected to an oxygen sensor.

[0076] The intake pipe facilitates the acquisition of gas pressure within the partition chamber and the second sub-chamber 101b, allowing for the determination of carbon deposits in the particulate filter. Simultaneously, the oxygen sensor allows for the acquisition of oxygen concentration in the exhaust gas from the intake manifold 3 and the partition chamber. Specifically, the oxygen sensor on the intake manifold 3 detects the oxygen content in the exhaust gas to determine the incompleteness of fuel combustion in the engine, while the oxygen sensor on the partition chamber detects the oxygen concentration in the treated exhaust gas to determine if the catalytic converter has failed. The aforementioned oxygen sensor interface, oxygen sensor, intake pipe interface, and intake pipe configuration are standard practices in existing vehicles and will not be elaborated upon further here.

[0077] Continuing with reference to Figures 2 through 6, in some of the exemplary embodiments, this embodiment may, for example, make the second anechoic cavity 102 include a plurality of sub-cavities arranged in series.

[0078] The above-mentioned multiple sub-cavities are arranged sequentially along the direction of exhaust airflow. The sub-cavity at the first end is connected to the exhaust end 202 through the first conduit 1023, and the sub-cavity at the end is connected to the exhaust pipe 4 through the second conduit 1024. It can be understood that when the exhaust airflow flows, it flows from the exhaust end 202 into the first conduit 1023 after passing through the purification device 2, flows through the first conduit 1023 into the sub-cavity at the first end, and after passing through each sub-cavity, it flows through the second conduit 1024 connected to the sub-cavity at the end to the exhaust pipe 4 for discharge.

[0079] By using multiple sub-cavities, different silencing principles can be applied to different sub-cavities for noise reduction. For example, it can be constructed as an expansion chamber and a resonance chamber. When sound waves in the gas enter the expansion chamber, they rub against the inner wall of the expansion chamber during propagation, thus breaking down the sound waves and achieving noise reduction. When sound waves in the gas enter the resonance chamber, the gas in the resonance chamber vibrates, and the resonance waves generated by the gas vibration interact with the sound waves and cancel each other out, achieving noise reduction.

[0080] The multiple sub-cavities connected in series separate the flow area of ​​the exhaust gas within the second silencing cavity 102. The sub-cavity at the first end is connected to the exhaust outlet 202 via the first conduit 1023, and the sub-cavity at the end is connected to the exhaust pipe 4 via the second conduit 1024. This facilitates the exhaust gas flow through each sub-cavity before being discharged, increases the silencing path, improves the silencing and noise reduction effect of the second silencing cavity 102, and is also helpful for the design and implementation of the second silencing cavity 102.

[0081] Furthermore, it is worth noting that in specific implementations, multiple sub-cavities can be separated, for example, by a partition 1021 (such as a steel plate). To facilitate the flow of exhaust gas, a micro-perforated structure is provided on the partition 1021. The porosity, pore shape, and arrangement of the micro-perforated structure can refer to the porosity, pore shape, and arrangement of the micro-perforated structure on the air inlet 201 and air outlet 202 of the purification device 2 described above. The connection method between the partition 1021 and each duct can, for example, refer to the connection method between the partition 1021 and the duct in existing vehicle exhaust systems (such as welding), and will not be elaborated further here.

[0082] It should be noted that the arrangement, porosity, and pore shape of the micro-perforated structure on the partition 1021 can be arranged according to actual design needs, so as to achieve noise reduction and filtering of different sound wave frequency bands by different sub-cavities.

[0083] As shown in Figures 1 to 3, and in conjunction with Figures 5 and 6, in some of the exemplary embodiments, the second anechoic cavity 102 is still taken as an example, comprising a plurality of sub-cavities arranged in series.

[0084] The above-mentioned multiple sub-cavities include a first sub-cavity 102a, a third sub-cavity 102c, and a fourth sub-cavity 102d arranged sequentially along the exhaust airflow direction. A first conduit 1023 passes through the fourth sub-cavity 102d and the third sub-cavity 102c sequentially and communicates with the first sub-cavity 102a. A second conduit 1024 passes through the first sub-cavity 102a and the third sub-cavity 102c sequentially and communicates with the fourth sub-cavity 102d. Among them, the first sub-cavity 102a is the sub-cavity located at the beginning, and the fourth sub-cavity 102d is the sub-cavity located at the end.

[0085] The exhaust gas flows from the outlet end 202 into the first conduit 1023, then from the first conduit 1023 into the first sub-cavity 102a, and then through the first sub-cavity 102a and the third sub-cavity 102c before flowing into the fourth sub-cavity 102d. It then flows through the second conduit 1024 from the fourth sub-cavity 102d to the outlet pipe 4. The arrangement of the first sub-cavity 102a, the third sub-cavity 102c, and the fourth sub-cavity 102d ensures that the exhaust gas is discharged after passing through the first sub-cavity 102a, the third sub-cavity 102c, and the fourth sub-cavity 102d. Both the first conduit 1023 and the second conduit 1024 are located within the second silencing cavity 102, which improves the noise reduction effect of the second silencing cavity 102. Furthermore, the structure is simple and easy to design and implement.

[0086] As shown in Figures 1 to 3, and in conjunction with Figures 5 and 6, in some of the exemplary embodiments, the first conduit 1023 is provided with a first through hole 1026 communicating with the fourth sub-cavity 102d.

[0087] In practical implementation, the first through hole 1026 can be, for example, a micro-perforated structure. The porosity, pore shape, and arrangement of the micro-perforated structure can still refer to the porosity, pore shape, and arrangement of the micro-perforated structure on the air inlet end 201 and air outlet end 202 of the purification device 2. Through the setting of the first through hole 1026, the first conduit 1023 and the fourth sub-cavity 102d can be connected. Based on achieving a longer silencing path, this facilitates the silencing function of the fourth sub-cavity 102d for exhaust gas.

[0088] Specifically, when the exhaust gas flows through the first conduit 1023, some of its sound waves can also enter the fourth sub-cavity 102d through the first through hole 1026. The sound waves entering the fourth sub-cavity 102d will rub against the inner wall of the fourth sub-cavity 102d to lose the energy of the sound waves. The sound waves reflected after the collision will also rub against each other, resulting in energy loss of the sound waves. When two sound waves of the same frequency but with opposite reflection directions collide, the two sound waves will also cancel each other out. By allowing the sound waves to enter the fourth sub-cavity 102d, the number of friction, reflection and collision of the sound waves is increased, the energy loss of the sound waves is increased, and the noise reduction effect of the fourth sub-cavity 102d is improved.

[0089] As shown in Figures 1 to 3, and in conjunction with Figures 5 and 6, in some of the exemplary embodiments, a second sub-cavity 102b is provided between the first sub-cavity 102a and the third sub-cavity 102c.

[0090] The second sub-cavity 102b is provided with a third conduit 1025. The first sub-cavity 102a and the third sub-cavity 102c are connected through the third conduit 1025, and the third conduit 1025 is provided with a second through hole 1027 that communicates with the second sub-cavity 102b. In specific implementation, the second through hole 1027 can be, for example, a micro-perforated structure. The porosity, pore shape, and arrangement of the micro-perforated structure can still refer to the porosity, pore shape, and arrangement of the micro-perforated structure on the air inlet end 201 and air outlet end 202 of the purification device 2. The provision of the second sub-cavity 102b increases the sound-absorbing path within the second silencing cavity 102, which is beneficial to improving the sound absorption and noise reduction effect of the second silencing cavity 102. The provision of the third conduit 1025 facilitates the connection between the first sub-cavity 102a and the third sub-cavity 102c, and the provision of the second through hole 1027 on the third conduit 1025 facilitates the realization of the sound absorption function of the second sub-cavity 102b.

[0091] It is worth mentioning that, in specific implementation, in order to facilitate the flow of exhaust gas, a connecting hole 1022 is provided on the partition 1021 located between the third sub-cavity 102c and the fourth sub-cavity 102d. Along the length direction of the silencing device 1, the projection outline of the opening of the third conduit 1025 on the partition 1021 located between the third sub-cavity 102c and the fourth sub-cavity 102d coincides with the projection outline of the connecting hole 1022. Through the setting of the connecting hole 1022, it is convenient to facilitate the flow of exhaust gas from the third sub-cavity 102c to the fourth sub-cavity 102d while ensuring the silencing and noise reduction effect.

[0092] In practical implementation, when the exhaust gas flows through the third duct 1025, some of its sound waves can also enter the second sub-cavity 102b through the second through hole 1027, which increases the number of friction, reflection and collision of the sound waves, thereby increasing the energy loss of the sound waves and improving the noise reduction effect of the second sub-cavity 102b.

[0093] As shown in Figures 1 to 3 in conjunction with Figures 5 and 6, in some exemplary embodiments, taking the provision of a second sub-cavity 102b between the first sub-cavity 102a and the third sub-cavity 102c as an example, this embodiment allows the first conduit 1023 to pass through the second sub-cavity 102b, and the first conduit 1023 is provided with a third through hole 1028 communicating with the inside of the second sub-cavity 102b.

[0094] In practical implementation, the third through hole 1028 can be, for example, a micro-perforated structure. The porosity, pore shape, and arrangement of the micro-perforated structure can still refer to the porosity, pore shape, and arrangement of the micro-perforated structure on the air inlet end 201 and air outlet end 202 of the purification device 2. By providing a third through hole 1028 on the first conduit 1023 that communicates with the second sub-cavity 102b, the noise reduction function of the second sub-cavity 102b can be better realized.

[0095] It is understandable that when the exhaust gas flows through the first conduit 1023, some of its sound waves can also enter the second sub-cavity 102b through the third through hole 1028, which increases the number of friction, reflection and collision of the sound waves, thereby increasing the energy loss of the sound waves and improving the noise reduction effect of the second sub-cavity 102b.

[0096] Furthermore, continuing from Figures 1 to 3 in conjunction with Figures 5 and 6, in some exemplary embodiments, the second sub-cavity 102b is provided with a third conduit 1025, the first sub-cavity 102a and the third sub-cavity 102c are connected through the third conduit 1025, and the third conduit 1025 is provided with a second through hole 1027 communicating with the second sub-cavity 102b, and the first conduit 1023 passes through the second sub-cavity 102b, and the first conduit 1023 is provided with a third through hole 1028 communicating with the second sub-cavity 102b. In this embodiment, sound-absorbing material may be provided in the second sub-cavity 102b.

[0097] The aforementioned sound-absorbing material (such as glass fiber) is filled in the second sub-cavity 102b and, together with the first conduit 1023, the third conduit 1025, the second through hole 1027, and the third through hole 1028, forms a high-frequency sound-absorbing cavity to absorb high-frequency noise in the exhaust noise. The use of sound-absorbing material helps to improve the noise reduction effect of the second sub-cavity 102b and facilitates design and implementation.

[0098] Understandably, by using sound-absorbing materials, the number of times sound waves are rubbed, reflected, and collided is further increased, which increases the energy loss of sound waves and improves the noise reduction effect of the second sub-cavity 102b.

[0099] Continuing with Figures 1 to 3 in conjunction with Figures 5 and 6, in some exemplary embodiments, the second anechoic cavity 102 still includes a first sub-cavity 102a, a second sub-cavity 102b, a third sub-cavity 102c, and a fourth sub-cavity 102d. In this embodiment, for example, the fourth sub-cavity 102d can be located at one end of the anechoic device 1, the first anechoic cavity 101 and the first sub-cavities 102a, 102b, and 102c are located on the same side of the fourth sub-cavity 102d, and the first sub-cavities 102a, 102b, and 102c are located on the same side of the first anechoic cavity 101.

[0100] It is understandable that by placing the first silencing cavity 101, as well as the first sub-cavities 102a, the second sub-cavities 102b, and the third sub-cavities 102c, on the same side of the fourth sub-cavities 102d, and placing the first sub-cavities 102a, the second sub-cavities 102b, and the third sub-cavities 102c on the same side of the first silencing cavity 101, it is not only beneficial to realize the integrated design of the exhaust system and improve its structural compactness, but also to extend the silencing path and improve the silencing and noise reduction effect.

[0101] It should be noted that, as shown in Figures 5 and 6, the exhaust airflow flows in from the intake pipe 3, passes through the intake end 201 of the purification device 2, passes through the first sub-chamber 101a, passes through the first purification unit 203 and the second purification unit 204, flows into the first conduit 1023 from the exhaust end 202 of the purification device 2, passes through the second sub-chamber 101b, passes through the first conduit 1023, passes through the fourth sub-chamber 102d, the third sub-chamber 102c and the second sub-chamber 102b, flows into the first sub-chamber 102a, passes through the third conduit 1025, passes through the second sub-chamber 102b, flows into the third sub-chamber 102c, passes through the connecting hole 1022 on the partition 1021, flows into the fourth sub-chamber 102d, passes through the second conduit 1024, passes through the third sub-chamber 102c, the second sub-chamber 102b and the first sub-chamber 102a, and flows into the exhaust pipe 4 to be discharged to the outside.

[0102] At this time, as the exhaust airflow flows, the sound waves of the exhaust noise are dissipated through the micro-perforated structures provided on the inlet end 201 and the outlet end 202, as well as the first through hole 1026, the second through hole 1027 and the third through hole 1028. The sound waves are also dissipated through the friction, reflection and collision of the first sub-cavity 101a, the second sub-cavity 101b, the first sub-cavity 102a, the second sub-cavity 102b, the third sub-cavity 102c and the fourth sub-cavity 102d, thus completing the noise reduction process.

[0103] It is worth noting that, regarding the exhaust system of this embodiment, based on the above exemplary implementations, in specific implementation, as a preferred embodiment, it may include, for example, the muffler 1 and the purification device 2, as shown in Figures 1 to 6.

[0104] The silencing device 1 includes an air inlet pipe 3, an air outlet pipe 4, a first silencing cavity 101, and a second silencing cavity 102. The purification device 2 is located in the first silencing cavity 101 and divides the first silencing cavity 101 into a first sub-cavity 101a and a second sub-cavity 101b. The air inlet end 201 and the air outlet end 202 of the purification device 2 are located in the first sub-cavity 101a and the second sub-cavity 101b, respectively, and both the air inlet end 201 and the air outlet end 202 are provided with micro-perforated structures. At this time, the first sub-cavity 101a and the second sub-cavity 101b are resonance chambers.

[0105] The second silencing cavity 102 includes a first sub-cavity 102a, a second sub-cavity 102b, a third sub-cavity 102c, and a fourth sub-cavity 102d. The fourth sub-cavity 102d is located at one end of the silencing device 1. The first silencing cavity 101, the first sub-cavity 102a, the second sub-cavity 102b, and the third sub-cavity 102c are all located on the same side of the fourth sub-cavity 102d. The first sub-cavity 102a, the second sub-cavity 102b, and the third sub-cavity 102c are all located on the same side of the first silencing cavity 101.

[0106] The second silencer is provided with a first conduit 1023, a second conduit 1024 and a third conduit 1025. The first conduit 1023 is connected to the air outlet 202 of the purification device 2, and after passing through the fourth sub-cavity 102d, the third sub-cavity 102c and the second sub-cavity 102b, it is connected to the first sub-cavity 102a. The second conduit 1024 is connected to the fourth sub-cavity 102d, and after passing through the third sub-cavity 102c, the second sub-cavity 102b and the first sub-cavity 102a, it is connected to the air outlet pipe 4. The third conduit 1025 is located in the second sub-cavity 102b and is connected to the first sub-cavity 102a and the third sub-cavity 102c respectively.

[0107] The second sub-cavity 102b contains sound-absorbing material. The portion of the first conduit 1023 located within the fourth conduit has a first through-hole 1026, the portion of the first conduit 1023 located within the second sub-cavity 102b has a third through-hole 1028, and the third conduit 1025 has a second through-hole 1027. In this configuration, the first sub-cavity 102a is an expansion cavity, and the second sub-cavity 102b, third sub-cavity 102c, and fourth sub-cavity 102d are resonant cavities.

[0108] The purification device 2 includes a first purification unit 203 and a second purification unit 204. The first purification unit 203 and the second purification unit 204 are arranged sequentially along the air intake direction. The first purification unit 203 is a catalyst and the second purification unit 204 is a particulate filter.

[0109] In addition, regarding the exhaust system of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it may include, for example, a muffler 1 and a purification device 2, as shown in Figures 1 to 6.

[0110] The silencing device 1 includes an air inlet pipe 3, an air outlet pipe 4, a first silencing cavity 101, and a second silencing cavity 102. The purification device 2 is located in the first silencing cavity 101 and divides the first silencing cavity 101 into a first sub-cavity 101a and a second sub-cavity 101b. The air inlet end 201 and the air outlet end 202 of the purification device 2 are located in the first sub-cavity 101a and the second sub-cavity 101b, respectively, and both the air inlet end 201 and the air outlet end 202 are provided with micro-perforated structures. At this time, the first sub-cavity 101a and the second sub-cavity 101b are resonance chambers.

[0111] The second silencing cavity 102 includes a first sub-cavity 102a, a second sub-cavity 102b, a third sub-cavity 102c, and a fourth sub-cavity 102d. The fourth sub-cavity 102d is located at one end of the silencing device 1. The first silencing cavity 101, the first sub-cavity 102a, the second sub-cavity 102b, and the third sub-cavity 102c are all located on the same side of the fourth sub-cavity 102d. The first sub-cavity 102a, the second sub-cavity 102b, and the third sub-cavity 102c are all located on the same side of the first silencing cavity 101.

[0112] The second silencer is provided with a first conduit 1023, a second conduit 1024 and a third conduit 1025. The first conduit 1023 is connected to the air outlet 202 of the purification device 2, and after passing through the fourth sub-cavity 102d, the third sub-cavity 102c and the second sub-cavity 102b, it is connected to the first sub-cavity 102a. The second conduit 1024 is connected to the fourth sub-cavity 102d, and after passing through the third sub-cavity 102c, the second sub-cavity 102b and the first sub-cavity 102a, it is connected to the air outlet pipe 4. The third conduit 1025 is located in the second sub-cavity 102b and is connected to the first sub-cavity 102a and the third sub-cavity 102c respectively.

[0113] The second sub-cavity 102b contains sound-absorbing material, the portion of the first conduit 1023 located within the fourth conduit has a first through hole 1026, and the portion of the first conduit 1023 located within the second sub-cavity 102b has a third through hole 1028. In this configuration, the first sub-cavity 102a is an expansion cavity, and the second sub-cavity 102b, third sub-cavity 102c, and fourth sub-cavity 102d are resonant cavities.

[0114] The purification device 2 includes a first purification unit 203 and a second purification unit 204. The first purification unit 203 and the second purification unit 204 are arranged sequentially along the air intake direction. The first purification unit 203 is a catalyst and the second purification unit 204 is a particulate filter.

[0115] In addition, regarding the exhaust system of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it may include, for example, a muffler 1 and a purification device 2, as shown in Figures 1 to 6.

[0116] The silencing device 1 includes an air inlet pipe 3, an air outlet pipe 4, a first silencing cavity 101, and a second silencing cavity 102. The purification device 2 is located in the first silencing cavity 101 and divides the first silencing cavity 101 into a first sub-cavity 101a and a second sub-cavity 101b. The air inlet end 201 and the air outlet end 202 of the purification device 2 are located in the first sub-cavity 101a and the second sub-cavity 101b, respectively, and both the air inlet end 201 and the air outlet end 202 are provided with micro-perforated structures. At this time, the first sub-cavity 101a and the second sub-cavity 101b are resonance chambers.

[0117] The second silencing cavity 102 includes a first sub-cavity 102a, a second sub-cavity 102b, a third sub-cavity 102c, and a fourth sub-cavity 102d. The fourth sub-cavity 102d is located at one end of the silencing device 1. The first silencing cavity 101, the first sub-cavity 102a, the second sub-cavity 102b, and the third sub-cavity 102c are all located on the same side of the fourth sub-cavity 102d. The first sub-cavity 102a, the second sub-cavity 102b, and the third sub-cavity 102c are all located on the same side of the first silencing cavity 101.

[0118] The second silencer is provided with a first conduit 1023, a second conduit 1024 and a third conduit 1025. The first conduit 1023 is connected to the air outlet 202 of the purification device 2, and after passing through the fourth sub-cavity 102d, the third sub-cavity 102c and the second sub-cavity 102b, it is connected to the first sub-cavity 102a. The second conduit 1024 is connected to the fourth sub-cavity 102d, and after passing through the third sub-cavity 102c, the second sub-cavity 102b and the first sub-cavity 102a, it is connected to the air outlet pipe 4. The third conduit 1025 is located in the second sub-cavity 102b and is connected to the first sub-cavity 102a and the third sub-cavity 102c respectively.

[0119] The second sub-cavity 102b contains sound-absorbing material, the portion of the first conduit 1023 located within the second sub-cavity 102b has a third through hole 1028, and the third conduit 1025 has a second through hole 1027. In this configuration, the first sub-cavity 102a is an expansion cavity, and the second sub-cavity 102b, third sub-cavity 102c, and fourth sub-cavity 102d are resonant cavities.

[0120] The purification device 2 includes a first purification unit 203 and a second purification unit 204. The first purification unit 203 and the second purification unit 204 are arranged sequentially along the air intake direction. The first purification unit 203 is a catalyst and the second purification unit 204 is a particulate filter.

[0121] In the above preferred embodiments, the specific settings and arrangements of the silencing device 1, the purification device 2, the air inlet pipe 3, and the air outlet pipe 4 can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the silencing device 1, the purification device 2, the air inlet pipe 3, and the air outlet pipe 4 can also be referred to the descriptions in the above exemplary embodiments.

[0122] The exhaust system of this embodiment adopts the above design. By placing the purification device 2 in the first muffler 101, the space occupied is reduced, which is conducive to the arrangement of other vehicle components. The arrangement of the first sub-cavity 101a and the second sub-cavity 101b is conducive to noise reduction. By making the second muffler 102 include the first sub-cavity 102a, the second sub-cavity 102b, the third sub-cavity 102c and the fourth sub-cavity 102d, the exhaust noise reduction path is optimized. The arrangement of the first conduit 1023, the second conduit 1024 and the third conduit 1025, as well as the first through hole 1026, the second through hole 1027 and the third through hole 1028, facilitates the friction, collision and cancellation of sound waves in each sub-cavity, which is conducive to the dissipation of sound wave energy, thereby improving the noise reduction effect of the exhaust system and improving the quality of use of the exhaust system.

[0123] An embodiment of the second aspect of this application provides a vehicle that includes the exhaust system described above.

[0124] In the vehicle of this embodiment, the exhaust system described above is part of the vehicle's exhaust structure and is generally connected to the upstream engine or other auxiliary muffler via a pipe. Furthermore, this exhaust system can be installed at the bottom of the vehicle using the installation method common in existing vehicle exhaust systems (such as a bracket).

[0125] In addition, in specific applications, an extension pipe can be added downstream of the above-mentioned exhaust system to change the exhaust position. Furthermore, for better noise reduction, an additional auxiliary muffler can be connected in series on the extension pipe.

[0126] The vehicle in this embodiment, by setting up the exhaust system as described above, integrates the purification device 2 into the first muffler 101, which reduces the space occupied, facilitates the arrangement of other components on the vehicle chassis, and ensures the noise reduction effect of the exhaust system, thereby improving the overall quality of the vehicle and having good practicality.

[0127] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. An exhaust system applied to a vehicle, wherein the exhaust system comprises a muffler (1) for muffler treatment of exhaust gas and a purification device (2) for purifying the exhaust gas, characterized in that: The silencing device (1) is provided with a first silencing cavity (101) and a second silencing cavity (102). The purification device (2) is located in the first silencing cavity (101). The air inlet pipe (3) of the silencing device (1) is connected to the air inlet end (201) of the purification device (2). The air outlet end (202) of the purification device (2) and the air outlet pipe (4) of the silencing device (1) are both connected to the second silencing cavity (102). The air inlet end (201) and / or the air outlet end (202) of the purification device (2) are connected to the first silencing cavity (101).

2. The exhaust system according to claim 1, characterized in that: The purification device (2) divides the first silencing cavity (101) into a first sub-cavity (101a) and a second sub-cavity (101b); the first sub-cavity (101a) is connected to the air inlet (201), and the second sub-cavity (101b) is connected to the air outlet (202).

3. The exhaust system according to claim 1, characterized in that: The purification device (2) is provided with a first purification unit (203) and a second purification unit (204) arranged sequentially along the exhaust gas flow direction; one of the first purification unit (203) and the second purification unit (204) includes a catalyst, and the other of the first purification unit (203) and the second purification unit (204) includes a particulate filter.

4. The exhaust system according to any one of claims 1 to 3, characterized in that: The second silencing cavity (102) includes a plurality of sub-cavities arranged in series; the plurality of sub-cavities are arranged sequentially along the exhaust airflow direction, and the sub-cavity located at the first end is connected to the exhaust end (202) through the first conduit (1023), and the sub-cavity located at the end is connected to the exhaust pipe (4) through the second conduit (1024).

5. The exhaust system according to claim 4, characterized in that: The plurality of sub-cavities include a first sub-cavity (102a), a third sub-cavity (102c), and a fourth sub-cavity (102d) arranged sequentially along the exhaust airflow direction; the first conduit (1023) passes through the fourth sub-cavity (102d) and the third sub-cavity (102c) in sequence and communicates with the first sub-cavity (102a), and the second conduit (1024) passes through the first sub-cavity (102a) and the third sub-cavity (102c) in sequence and communicates with the fourth sub-cavity (102d).

6. The exhaust system according to claim 5, characterized in that: The first conduit (1023) is provided with a first through hole (1026) communicating with the fourth sub-cavity (102d).

7. The exhaust system according to claim 5, characterized in that: A second sub-cavity (102b) is provided between the first sub-cavity (102a) and the third sub-cavity (102c); a third conduit (1025) is provided in the second sub-cavity (102b), the first sub-cavity (102a) and the third sub-cavity (102c) are connected through the third conduit (1025), and the third conduit (1025) is provided with a second through hole (1027) that communicates with the second sub-cavity (102b).

8. The exhaust system according to claim 7, characterized in that: The first conduit (1023) passes through the second sub-cavity (102b), and the first conduit (1023) is provided with a third through hole (1028) communicating with the inside of the second sub-cavity (102b); and / or, the second sub-cavity (102b) is provided with sound-absorbing material.

9. The exhaust system according to claim 7, characterized in that: The fourth sub-cavity (102d) is located at one end of the silencing device (1). The first silencing cavity (101), the first sub-cavity (102a), the second sub-cavity (102b) and the third sub-cavity (102c) are located on the same side of the fourth sub-cavity (102d), and the first sub-cavity (102a), the second sub-cavity (102b) and the third sub-cavity (102c) are located on the same side of the first silencing cavity (101).

10. A vehicle, characterized in that: The exhaust system includes any one of claims 1 to 9.

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