Exhaust system and vehicle

Abstract

The utility model discloses an exhaust system and a vehicle, the exhaust system is applied to an engine, the exhaust system comprises two air inlet pipelines, the air inlet pipelines are provided with air inlets, the air inlets are used for being communicated with a waste gas port of the engine, and waste gas purification substances are arranged in the air inlet pipelines; the first silencing piece is provided with a first air inlet part and a second air inlet part, the first air inlet part is connected with one of the two air inlet pipelines, and the second air inlet part is connected with the other one of the two air inlet pipelines; and an included angle is formed between the first air inlet part and the second air inlet part, so that air flow noise in the multiple air inlet pipelines is mutually counteracted. According to the exhaust system, the first silencing piece provided with the first air inlet part and the second air inlet part is arranged, the included angle is formed between the first air inlet part and the second air inlet part, and therefore the noise problem is solved, and the exhaust system is simple in structure and high in reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an exhaust system and a vehicle. Background Art

[0002] In the related technology, a V-type six-cylinder gasoline engine includes two turbocharger outlets, and two corresponding pipes are arranged. The two pipes are connected to the exhaust gas treatment device. However, the two pipes have the problem of half-order noise, such as 1.5-order noise. The low-frequency noise has a lower frequency and a longer wavelength, and has stronger penetration and propagation. The low-frequency noise can easily cause the roar problem in the car, thereby affecting the NVH performance of the whole vehicle and the driving experience of the passengers. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an exhaust system and a vehicle to improve the noise problem, improve the NVH performance of the whole vehicle and the driving experience of passengers.

[0004] According to the exhaust system of the embodiment of the utility model, the exhaust system is applied to the engine, and the exhaust system comprises: two intake pipes, the intake pipes are provided with an air inlet, the air inlet is used to connect to the exhaust port of the engine, and the intake pipes are provided with exhaust gas purification substances; a first muffler, the first muffler has a first air inlet part and a second air inlet part, the first air inlet part is connected to one of the two intake pipes, and the second air inlet part is connected to the other of the two intake pipes; wherein an angle is provided between the first air inlet part and the second air inlet part so that the airflow noise in the two intake pipes cancels each other.

[0005] According to the exhaust system of the embodiment of the utility model, a first silencer having a first air intake portion and a second air intake portion is provided, an angle is provided between the first air intake portion and the second air intake portion, the first air intake portion and the second air intake portion merge, the noise phase and amplitude generated by the airflows therein are different, the noises at the two positions are at least partially offset, thereby improving the noise problem. The exhaust system of the embodiment of the utility model has a simple structure and high reliability.

[0006] In some embodiments, the first air inlet portion is configured as a first constricted pipe, and the second air inlet portion is configured as a second constricted pipe.

[0007] In some embodiments, an intersection portion is provided between the first necked pipe and the second necked pipe, an intersection space is provided in the intersection portion, the first silencer also has an outlet portion, the outlet portion is provided on one side of the intersection space, a guide plate is provided in the intersection space, and the guide plate extends from one end of the intersection space away from the outlet portion toward the direction of the outlet portion.

[0008] In some embodiments, a back-pressure hole is provided on the guide plate, one end of the back-pressure hole is connected to the first necked pipeline, and the other end of the back-pressure hole is connected to the second necked pipeline.

[0009] In some embodiments, the two air intake pipes include a first air intake pipe and a second air intake pipe, the diameter of the first air intake pipe is Φ1, the diameter of the second air intake pipe is Φ2, and 0≤Φ1-Φ2≤1mm.

[0010] In some embodiments, the exhaust system further includes: a second muffler, wherein the second muffler is disposed downstream of the first muffler.

[0011] In some embodiments, the intake pipe includes: a storage component, in which the exhaust gas purification material is stored, and the storage component is connected to the first muffler component; an intake end cone component, which is arranged at the end of the storage component away from the first muffler component; an intake flange, which is connected to the intake end cone component, and the intake flange is used to connect to the engine.

[0012] In some embodiments, the first muffler further has an outlet portion, the outlet portion is connected to an air outlet pipe, an end of the air outlet pipe away from the outlet portion is provided with an air outlet flange, and the air outlet flange is connected to the second muffler.

[0013] In some embodiments, the air outlet pipe is at least partially configured as a bellows.

[0014] A vehicle according to an embodiment of the utility model includes the above-mentioned exhaust system.

[0015] According to the vehicle of the embodiment of the utility model, a first silencer having a first air intake portion and a second air intake portion is provided, an angle is provided between the first air intake portion and the second air intake portion, the first air intake portion and the second air intake portion merge, the noise phase and amplitude generated by the airflows in the two are different, the noises at the two positions are at least partially offset, thereby improving the noise problem. The exhaust system of the embodiment of the utility model has a simple structure and high reliability.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the structure of the exhaust system in the first embodiment of the utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the structure of the first muffler;

[0020] Figure 3 This is a schematic diagram of the structure of the guide plate in the embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the cooperation between the guide plate and the first muffler in the embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the exhaust system in the second embodiment of the utility model;

[0023] Figure 6 It is a schematic structural diagram of the exhaust system in the third embodiment of the utility model.

[0024] Reference numerals:

[0025] 100. Exhaust system;

[0026] 10. air intake duct; 11. air intake port; 13. first air intake duct; 14. second air intake duct; 15. storage member; 151. bracket member; 16. air intake end cone member; 17. air intake flange;

[0027] 20. First silencer; 21. First air inlet; 22. Second air inlet; 23. Guide plate; 231. Back pressure hole; 24. Outlet; 241. Air outlet pipe; 2411. Bellows; 242. Air outlet flange; 25. Intersection; 251. Intersection space; 30. Second silencer. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Reference below Figure 1-Figure 6 An exhaust system 100 according to an embodiment of the present invention is described.

[0032] Reference Figure 1 As shown, according to an exhaust system 100 according to an embodiment of the present invention, the exhaust system 100 is applied to an engine, and the exhaust system 100 includes: a first muffler 20 and two intake pipes 10 .

[0033] The air intake duct 10 is provided with an air intake port 11, which is used to connect to the exhaust port of the engine, and an exhaust gas purification material is provided in the air intake duct 10. The first muffler 20 has a first air intake portion 21 and a second air intake portion 22, the first air intake portion 21 is connected to one of the two air intake ducts 10, and the second air intake portion 22 is connected to the other of the two air intake ducts 10.

[0034] There is an included angle between the first air intake portion 21 and the second air intake portion 22 so that the airflow noises in the plurality of air intake ducts 10 cancel each other out.

[0035] In the above scheme, an exhaust gas purification material, such as activated carbon, molecular sieve, oxide catalyst or chemical absorbent, is arranged in the intake pipe 10. The engine generates exhaust gas, such as SO2, NH3 and NO2, during operation. The exhaust gas purification material can purify the exhaust gas, such as adsorbing the exhaust gas and filtering the exhaust gas. There can also be multiple intake pipes 10, and the number of intake pipes 10 matches the number of exhaust ports on the engine.

[0036] In the related technology, a V-type six-cylinder gasoline engine includes two turbocharger outlets, and two corresponding pipes are arranged. The two pipes are connected to the exhaust gas treatment device. However, the two pipes have the problem of half-order noise, such as 1.5-order noise. The low-frequency noise has a lower frequency and a longer wavelength, and has stronger penetration and propagation. The low-frequency noise can easily cause the roar problem in the car, thereby affecting the NVH performance of the whole vehicle and the driving experience of the passengers.

[0037] In the embodiment of the utility model, a first muffler 20 having a first air inlet 21 and a second air inlet 22 is provided, and an angle is set between the first air inlet 21 and the second air inlet 22. Figure 1 As shown, the angle between the first air intake portion 21 and the second air intake portion 22 is θ, and the first air intake portion 21 merges with the second air intake portion 22. The noise phase and amplitude generated by the airflow in the two are different, and the noise at the two positions is at least partially offset. For example, the noise peak and the trough offset each other, thereby improving the noise problem. The exhaust system 100 of the embodiment of the utility model has a simple structure and high reliability.

[0038] According to the exhaust system 100 of the embodiment of the utility model, a first silencer 20 having a first air intake portion 21 and a second air intake portion 22 is provided, and an angle is provided between the first air intake portion 21 and the second air intake portion 22. The first air intake portion 21 and the second air intake portion 22 merge, and the noise phase and amplitude generated by the airflows therein are different, and the noises at the two positions are at least partially offset, thereby improving the noise problem. The first silencer 20 of the embodiment of the utility model has a simple structure and high reliability.

[0039] Reference Figure 1 As shown, in some embodiments, the angle between the first air inlet 21 and the second air inlet 22 is θ, 0<θ<360°. By setting it within the range of 0 to 360°, the noise generated by the first air inlet 21 and the second air inlet 22 is offset, thereby improving the noise problem.

[0040] Reference Figure 1 As shown, in some specific embodiments, the angle between the first air inlet 21 and the second air inlet 22 is θ, 0<θ≤200°. By setting it within the range of 0 to 200°, the noise generated by the first air inlet 21 and the second air inlet 22 is better offset, thereby improving the improvement effect.

[0041] Reference Figure 1 As shown, in some specific embodiments, the angle between the first air inlet 21 and the second air inlet 22 is θ, 80≤θ≤200°. By setting it within the range of 80° to 200°, the noise generated by the first air inlet 21 and the second air inlet 22 is better offset, further improving the improvement effect.

[0042] For example, the angle θ between the first air intake portion 21 and the second air intake portion 22 is 90°; or, the angle θ between the first air intake portion 21 and the second air intake portion 22 is 95°; or, the angle θ between the first air intake portion 21 and the second air intake portion 22 is 100°; or, the angle θ between the first air intake portion 21 and the second air intake portion 22 is 105°; or, the angle θ between the first air intake portion 21 and the second air intake portion 22 is 110°; or, the angle θ between the first air intake portion 21 and the second air intake portion 22 is 115°; or, the angle θ between the first air intake portion 21 and the second air intake portion 22 is 120°.

[0043] Reference Figures 1 to 6 As shown, in some embodiments, the first air intake portion 21 is configured as a first constricted pipe, and the second air intake portion 22 is configured as a second constricted pipe.

[0044] The first constricted pipeline is a hollow pipeline structure, and the diameter of the first constricted pipeline gradually decreases; the second constricted pipeline is a hollow pipeline structure, and the diameter of the second constricted pipeline gradually decreases.

[0045] In the above scheme, by constructing the first air intake part 21 as a first constricted pipe and the second air intake part 22 as a second constricted pipe, the diameter of the first constricted pipe gradually decreases, and the diameter of the second constricted pipe gradually decreases, the exhaust gas flow is forced to pass through a smaller pipe structure, which increases the speed of the air flow, improves the efficiency of the exhaust system 100, and promotes faster discharge of exhaust gas.

[0046] Reference Figures 2 to 4 As shown, in some embodiments, a junction 25 is provided between the first necked pipeline and the second necked pipeline, a junction space 251 is provided in the junction 25, the first muffler 20 also has an outlet 24, the outlet 24 is provided on one side of the junction space 251, a guide plate 23 is provided in the junction space 251, and the guide plate 23 extends from one end of the junction space 251 away from the outlet 24 toward the direction of the outlet 24.

[0047] The first constricted pipeline intersects with the second constricted pipeline, the first constricted pipeline intersects with the second constricted pipeline at a junction 25 , and the spaces inside the first constricted pipeline and the second constricted pipeline intersect at a junction space 251 .

[0048] Among them, the guide plate 23 is a plate-shaped structure, and the guide plate 23 is installed in the intersection space 251. The guide plate 23 plays a guiding effect, guiding the exhaust gas in the first necked pipe and the second necked pipe to the outlet part 24. The outlet part 24 is the third pipe structure on the first muffler 20, and the outlet part 24 merges the first necked pipe and the second necked pipe.

[0049] Specifically, the guide plate 23 extends to contact the space within the outlet portion 24 or extends into the space within the outlet portion 24.

[0050] That is to say, the guide plate 23 at least extends to the outlet portion 24 , wherein the guide plate 23 may extend to contact the space in the outlet portion 24 , or the guide plate 23 may extend longer, and the guide plate 23 extends into the space in the outlet portion 24 .

[0051] In the above scheme, a guide plate 23 is provided at the intersection of the first constricted pipe and the second constricted pipe, and the guide plate 23 extends at least to the outlet 24. The guide plate 23 separates the first constricted pipe and the second constricted pipe to avoid cross-flow of exhaust gas in the first constricted pipe and the second constricted pipe.

[0052] For example, the first necked pipeline and the second necked pipeline meet at the outlet 24, and a guide plate 23 is provided at the intersection of the first necked pipeline and the second necked pipeline, and the guide plate 23 extends in the direction of the outlet 24, and the guide plate 23 extends to contact the edge of the space where the outlet 24 is located; or, the first necked pipeline and the second necked pipeline meet at the outlet 24, and a guide plate 23 is provided at the intersection of the first necked pipeline and the second necked pipeline, and the guide plate 23 extends in the direction of the outlet 24, and the guide plate 23 extends into the space where the outlet 24 is located.

[0053] Reference Figure 3 , Figure 4 As shown, in some embodiments, a back pressure hole 231 is provided on the guide plate 23, and one end of the back pressure hole 231 is connected to the first necked pipeline, and the other end is connected to the second necked pipeline.

[0054] The back pressure hole 231 is a through hole structure, and the back pressure hole 231 is arranged on the guide plate 23 .

[0055] In the above solution, a back pressure hole 231 is provided on the guide plate 23. The back pressure hole 231 can reduce the back pressure, avoid damage to the performance of the engine caused by excessive back pressure, and improve the output capacity.

[0056] Specifically, during the operation of the engine, different exhaust ports discharge exhaust gas at different times. When there is exhaust gas in the first constricted pipe, there is usually no exhaust gas in the second constricted pipe. When there is exhaust gas in the second constricted pipe, there is usually no exhaust gas in the first constricted pipe. When there is exhaust gas in the first constricted pipe, the exhaust gas in the first constricted pipe passes through the back pressure hole 231 and goes around the second constricted pipe into the outlet portion 24, thereby reducing the back pressure.

[0057] Reference Figure 3 , Figure 4 As shown, in some specific embodiments, there are multiple back pressure holes 231, and the multiple back pressure holes 231 are spaced apart and distributed on the guide plate 23, so that the back pressure is reduced on the basis of maintaining the strength of the guide plate 23. For example, there are five back pressure holes 231. Alternatively, the back pressure holes 231 are other numbers, and the number of openings of the back pressure holes 231 and the opening radius are set in combination with the exhaust back pressure.

[0058] Reference Figure 1 As shown, in some embodiments, the two air intake pipes 10 include a first air intake pipe 13 and a second air intake pipe 14, the diameter of the first air intake pipe 13 is Φ1, the diameter of the second air intake pipe 14 is Φ2, and 0≤Φ1-Φ2≤1mm.

[0059] The difference between the diameter Φ1 of the first air intake pipe 13 and the diameter Φ2 of the second air intake pipe 14 is in the range of 0 to 1 mm, that is, the diameters of the first air intake pipe 13 and the second air intake pipe 14 may be equal or different.

[0060] In the above embodiment, by setting the difference between Φ1 and Φ2 within the range of 0 to 1 mm, the diameter range of the first air intake duct 13 and the second air intake duct 14 are controlled, and the first air intake duct 13 and the second air intake duct 14 are always within the same range. To a certain extent, the noise generated by the airflow in the first air intake duct 13 and the second air intake duct 14 offsets each other, effectively improving the noise problem.

[0061] For example, (Φ1-Φ2) is equal to 0, that is, the diameters of the first air intake duct 13 and the second air intake duct 14 are equal; or, (Φ1-Φ2) is equal to 0.5 mm, and the diameters of the first air intake duct 13 and the second air intake duct 14 differ by 0.5 mm; or, (Φ1-Φ2) is equal to 1 mm, and the diameters of the first air intake duct 13 and the second air intake duct 14 differ by 1 mm.

[0062] In some embodiments, the length of the first air intake duct 13 is equal to the length of the second air intake duct 14 , and Φ1 is equal to Φ2 .

[0063] The first air intake duct 13 and the second air intake duct 14 have the same length and the same diameter, and the noise peaks and troughs generated by the airflows in the two cancel each other out, thereby effectively improving the noise problem.

[0064] In the above embodiment, by setting the first air intake duct 13 and the second air intake duct 14 to have equal lengths and equal diameters, the noise peaks and troughs generated by the airflows in the two air intake ducts cancel each other out, thereby better improving the noise problem.

[0065] Reference Figure 5 As shown, in some embodiments, the length of the first air intake pipe 13 is L1, the length of the second air intake pipe 14 is L2, (L1-L2)>0, (Φ1-Φ2)>0.

[0066] Among them, (L1-L2)>0, that is, the lengths of the first air intake pipe 13 and the second air intake pipe 14 are different, and (Φ1-Φ2)>0, the diameters of the first air intake pipe 13 and the second air intake pipe 14 are different.

[0067] In the above embodiment, by setting the first air intake duct 13 and the second air intake duct 14 to have different lengths and diameters, the noise peaks and troughs generated by the airflows therein are at least partially offset, thereby improving the noise problem.

[0068] Reference Figure 6 As shown, in some embodiments, the exhaust system 100 further includes: a second muffler 30 , which is disposed downstream of the first muffler 20 .

[0069] A second silencer 30 is further provided downstream of the first silencer 20 , that is, the exhaust gas will pass through the second silencer 30 after passing through the first silencer 20 .

[0070] In the above solution, the second sound-absorbing member 30 is arranged downstream of the first sound-absorbing member 20, and the second sound-absorbing member 30 is arranged on the basis of the first sound-absorbing member 20, so as to further process the noise and improve the driving experience of the passengers.

[0071] Reference Figure 5 , Figure 6 As shown, in some embodiments, the air intake duct 10 includes: a storage element 15 , an air intake end cone 16 and an air intake flange 17 .

[0072] The exhaust gas purification material is stored in the storage element 15, and the storage element 15 is connected to the first muffler 20. The intake end cone 16 is arranged at one end of the storage element 15 away from the first muffler 20. The intake flange 17 is connected to the intake end cone 16, and the intake flange 17 is used to connect to the engine.

[0073] The storage element 15 is a hollow structure, and the exhaust gas purification material is placed in the hollow structure. The exhaust gas flows through the exhaust gas purification device and is purified. The storage element 15 is connected to the first muffler 20, and the air intake end cone 16 is provided on the storage element 15. The air intake end cone 16 is provided with an air intake flange 17, and the air intake flange 17 is used to connect the engine, so that the air intake end cone 16 is connected to the exhaust port of the engine, and the exhaust gas flows through the air intake flange 17 and the air intake end cone 16 in sequence and enters the storage element 15.

[0074] In the above embodiment, the air intake end cone 16 is installed on the storage element 15, and the air intake flange 17 is installed on the air intake end cone 16. The air intake pipe 10 is spliced ​​together from multiple parts, which can simplify the structure of each part and reduce the manufacturing cost.

[0075] Reference Figure 1 , Figure 5 , Figure 6 As shown, in some embodiments, the first muffler 20 further has an outlet portion 24 , the outlet portion 24 is connected to an air outlet pipe 241 , an end of the air outlet pipe 241 away from the outlet portion 24 is provided with an air outlet flange 242 , and the air outlet flange 242 is connected to the second muffler 30 .

[0076] The gas outlet pipe 241 is disposed between the first muffler 20 and the second muffler 30 . The gas outlet pipe 241 is connected to the first muffler 20 and the second muffler 30 , respectively, to guide the gas discharged from the first muffler 20 to the second muffler 30 .

[0077] Specifically, the air outlet pipe 241 is at least partially configured as a bellows 2411 .

[0078] The bellows 2411 is a pipe with a wavy structure.

[0079] In the above scheme, the air outlet pipe 241 between the first silencer 20 and the second silencer 30 is partially set as a bellows 2411, which increases the surface area of ​​the pipe and enhances the pressure-bearing capacity of the pipe. At the same time, the wavy structure of the bellows 2411 can effectively disperse the pressure and reduce the stress concentration of the pipe under vibration and cyclic loads. Therefore, it has good anti-fatigue performance and extends the service life. At the same time, the wavy structure of the bellows 2411 can effectively absorb and reduce vibration and noise in the pipe.

[0080] In other embodiments, the first muffler 20 further has an outlet portion 24, the outlet portion 24 is connected to an outlet pipe 241, an end of the outlet pipe 241 away from the outlet portion 24 is provided with an outlet flange 242, and the outlet flange 242 is connected to the second muffler 30; wherein the outlet pipe 241 is at least partially configured as a bellows 2411. The air intake duct 10 includes: a storage element 15, an air intake end cone 16 and an air intake flange 17.

[0081] The exhaust gas purification material is stored in the storage member 15, and the storage member 15 is connected to the first muffler 20. The intake end cone member 16 is provided at the storage member 15. The intake flange 17 is connected to the intake end cone member 16, and the intake flange 17 is used to connect to the engine.

[0082] The storage element 15 is a hollow structure, and the exhaust gas purification material is placed in the hollow structure. The exhaust gas flows through the exhaust gas purification device and is purified. The storage element 15 is connected to the first muffler 20, and the air intake end cone 16 is arranged on the storage element 15. The air intake end cone 16 is provided with an air intake flange 17. The air intake flange 17 is used to connect the engine, so that the air intake end cone 16 is connected to the exhaust port of the engine, and the exhaust gas flows through the air intake flange 17 and the air intake end cone 16 in turn into the storage element 15. The bellows 2411 is a pipe with a wavy structure. The outlet pipe 241 is arranged between the first muffler 20 and the second muffler 30. The outlet pipe 241 connects the first muffler 20 and the second muffler 30 respectively, and guides the gas discharged from the first muffler 20 to the second muffler 30.

[0083] In the above scheme, the air intake pipe 10 is split into a storage part 15, an air intake end cone part 16 and an air intake flange 17, the outlet part 24 is connected to the air outlet pipe 241, and the air outlet flange 242 is arranged on the air outlet pipe 241. The overall structure is composed of a plurality of components, so that the structure of each component can be arranged more simply, thereby reducing the manufacturing cost.

[0084] Reference Figure 5 , Figure 6 As shown, in some specific embodiments, a bracket member 151 is provided on the storage member 15, and the bracket member 151 is used to connect to the vehicle body, so as to position the storage member 15 on the vehicle body.

[0085] In some embodiments, the engine is configured as a multi-cylinder engine, for example, the engine is a six-cylinder engine.

[0086] More specifically, the engine is a V-type six-cylinder gasoline engine.

[0087] In some specific embodiments, the intake duct 10 is connected to an exhaust port of the engine through a turbocharger.

[0088] The vehicle according to the embodiment of the present invention includes the exhaust system 100 mentioned above.

[0089] According to the vehicle of the embodiment of the utility model, a first silencer 20 having a first air intake portion 21 and a second air intake portion 22 is provided, and an angle is provided between the first air intake portion 21 and the second air intake portion 22. The first air intake portion 21 and the second air intake portion 22 merge, and the noise phase and amplitude generated by the airflows therein are different. The noises at the two positions are at least partially offset, thereby improving the noise problem. The first silencer 20 of the embodiment of the utility model has a simple structure and high reliability.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0091] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate 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 claims and their equivalents.

Claims

1. An exhaust system, characterized in that: The exhaust system is applied to an engine, and the exhaust system comprises: Two air intake pipes (10), each of which is provided with an air intake port (11), the air intake port (11) being used to communicate with an exhaust port of an engine, and an exhaust gas purification substance being provided in the air intake pipe (10); A first silencer (20), the first silencer (20) comprising a first air inlet portion (21) and a second air inlet portion (22), the first air inlet portion (21) being connected to one of the two air inlet pipes (10), and the second air inlet portion (22) being connected to the other of the two air inlet pipes (10); wherein: An included angle is provided between the first air intake portion (21) and the second air intake portion (22), so that airflow noises in the two air intake ducts (10) cancel each other out.

2. The exhaust system according to claim 1, characterized in that The first air inlet (21) is configured as a first constricted pipe, and the second air inlet (22) is configured as a second constricted pipe.

3. The exhaust system according to claim 2, characterized in that: A junction (25) is provided between the first constricted pipeline and the second constricted pipeline, a junction space (251) is provided in the junction (25), the first silencer (20) further comprises an outlet (24), the outlet (24) is provided on one side of the junction space (251), a guide plate (23) is provided in the junction space (251), and the guide plate (23) extends from one end of the junction space (251) away from the outlet (24) towards the direction of the outlet (24).

4. The exhaust system according to claim 3, characterized in that The guide plate (23) is provided with a back pressure hole (231), one end of the back pressure hole (231) is connected to the first necked pipeline, and the other end of the back pressure hole (231) is connected to the second necked pipeline.

5. The exhaust system according to claim 1, characterized in that The two air intake pipes (10) comprise a first air intake pipe (13) and a second air intake pipe (14); the diameter of the first air intake pipe (13) is Φ1, and the diameter of the second air intake pipe (14) is Φ2, where 0≤Φ1-Φ2≤1 mm.

6. The exhaust system according to claim 1, characterized in that Also includes: A second sound-reducing member (30), wherein the second sound-reducing member (30) is arranged downstream of the first sound-reducing member (20).

7. The exhaust system according to claim 6, characterized in that The air intake duct (10) comprises: a storage element (15), wherein the exhaust gas purification material is stored in the storage element (15), and the storage element (15) is connected to the first muffler element (20); An air intake end cone (16), the air intake end cone (16) being arranged at an end of the storage element (15) facing away from the first muffler element (20); An intake flange (17), the intake flange (17) is connected to the intake end cone (16), and the intake flange (17) is used to connect to the engine.

8. The exhaust system according to claim 6, characterized in that The first silencer (20) further comprises an outlet portion (24), the outlet portion (24) being connected to an air outlet pipe (241), an end of the air outlet pipe (241) away from the outlet portion (24) being provided with an air outlet flange (242), and the air outlet flange (242) being connected to the second silencer (30).

9. The exhaust system according to claim 8, characterized in that The air outlet pipe (241) is at least partially constructed as a bellows (2411).

10. A vehicle, characterized in that: An exhaust system comprising the exhaust system of any one of claims 1 to 9.

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