Silencer for exhaust system and vehicle with same
By designing a silencer that integrates resistive and reactive silencer functions and utilizing multiple silencer cavities and vent structures, the problem of poor frequency-selective silencer effect of existing silencers is solved, achieving better silencer effect and cost savings.
Patent Information
- Application Number
- CN202423076294.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-12-12
AI Technical Summary
Existing resistive silencers and reactive silencers have poor silencing effects on medium, high or low frequency sound waves, respectively, making it difficult to achieve an ideal silencing effect. At the same time, setting up multiple silencers will occupy chassis space and increase production costs.
A muffler is designed that integrates resistive and reactive muffler functions. Through the combination of multiple muffler cavities and vents, the airflow in the muffler can undergo multiple mid- and low-frequency reactive mufflers and mid- and high-frequency resistive mufflers. Sound-absorbing material and an expansion chamber structure are provided in the muffler shell.
The noise reduction effect is improved, the occupation of vehicle chassis space and production and processing costs are reduced, and the space and cost saving effects are achieved.
Smart Images
Figure CN223374488U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of vehicle technology, and in particular to a muffler for an exhaust system and a vehicle having the same. Background Art
[0002] To reduce vehicle exhaust noise, a muffler is typically installed in the vehicle's exhaust system. Mufflers are generally categorized as either resistive or reactive. Resistive mufflers are more effective at attenuating mid- and high-frequency sound waves, but less effective at attenuating low-frequency sound waves. Resistive mufflers are more effective at attenuating mid- and low-frequency sound waves, but less effective at attenuating high-frequency sound waves. Therefore, achieving ideal noise reduction performance with either a single resistive or reactive muffler pair is difficult.
[0003] Some vehicles are equipped with both resistive and reactive mufflers to improve noise reduction, but this takes up more chassis space and increases production and processing costs. Utility Model Content
[0004] The present application provides a muffler for an exhaust system and a vehicle having the same, aiming to achieve a better muffler effect while reducing the space occupied by the vehicle chassis and saving production and processing costs.
[0005] The specific technical solutions are as follows:
[0006] 14. The quiescent air filter of claim 13, wherein the at least one air intake duct is connected to the at least one air intake duct through the air intake opening, the at least one air intake duct extending along the air intake duct to the air intake opening, the at least one air intake duct extending along the air intake duct to the air intake opening, the at least one air intake duct extending along the air intake duct to the air intake opening, the at least one air intake duct extending along the air intake duct to the air intake opening
[0007] During operation, the muffler for an exhaust system in an embodiment of the present application undergoes multiple cycles of reactive muffler reduction in the low and medium frequency bands, as well as resistive muffler reduction in the high and medium frequency bands, within the muffler housing. This results in improved muffler performance. Furthermore, the muffler for an exhaust system in an embodiment of the present application integrates the functions of both resistive and reactive mufflers, eliminating the need for multiple mufflers in a vehicle's exhaust system. This reduces the space occupied by the vehicle chassis and saves production and processing costs.
[0008] In some embodiments of the present application, a portion of the core tube located in the second muffler chamber is provided with a third ventilation hole.
[0009] In some embodiments of the present application, there are multiple third ventilation holes, and the multiple third ventilation holes are distributed in an array.
[0010] In some embodiments of the present application, there are multiple second ventilation holes, and the multiple second ventilation holes are distributed in an array.
[0011] In some embodiments of the present application, a first partition, a second partition and a third partition are provided inside the muffler shell, and the first partition, the second partition and the third partition divide the inner cavity of the muffler shell into the first muffler chamber, the second muffler chamber, the third muffler chamber and the fourth muffler chamber; the second vent is provided on the second partition, and the third partition is provided with a through hole, and the third muffler chamber is connected with the fourth muffler chamber through the through hole.
[0012] In some embodiments of the present application, the second partition plate and the third partition plate are connected by a reinforcing rod; and / or the first partition plate and the second partition plate are connected by a reinforcing rod.
[0013] In some embodiments of the present application, a portion of the air inlet pipe located in the first muffler chamber is provided with a plurality of fourth ventilation holes.
[0014] In some embodiments of the present application, the muffler further includes a heat shield, which is disposed on the outer surface of the muffler shell.
[0015] In some embodiments of the present application, the muffler further includes a hanging assembly disposed on the muffler shell.
[0016] In some embodiments of the present application, a first external tube and a second external tube are further included, both of which are located outside the muffler shell, the first external tube is installed at the air inlet and is connected to the air inlet pipe, and the second external tube is installed at the exhaust port and is connected to the exhaust pipe.
[0017] In a second aspect, an embodiment of the present application provides a vehicle, comprising the muffler for an exhaust system according to any one of the above embodiments.
[0018] In the vehicle of the embodiment of the present application, the muffler for the exhaust system, during operation, causes the airflow within the muffler housing to undergo multiple cycles of reactive muffler in the mid- and low-frequency bands, as well as resistive muffler in the mid- and high-frequency bands. This results in a more effective muffler effect. Furthermore, the muffler for the exhaust system of the embodiment of the present application integrates the functions of both a resistive muffler and a reactive muffler, eliminating the need for multiple mufflers in the vehicle's exhaust system. This reduces the space occupied by the vehicle chassis and saves production and processing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 A schematic structural diagram of a muffler provided in one embodiment of the present application;
[0020] Figure 2 for Figure 1 A magnified schematic diagram of part A;
[0021] Figure 3 A schematic structural diagram of a muffler provided in one embodiment of the present application from another perspective;
[0022] Figure 4 A schematic diagram of the internal structure of a muffler provided in one embodiment of the present application;
[0023] Figure 5 A schematic diagram of the internal structure of a muffler provided in one embodiment of the present application (sound-absorbing material omitted);
[0024] Figure 6 A schematic structural diagram of a muffler provided in another embodiment of the present application;
[0025] Figure 7 This is a schematic structural diagram of a muffler provided in another embodiment of the present application from another perspective.
[0026] The description of the reference numerals in the figures is as follows:
[0027] 10. Muffler;
[0028] 100, muffler housing; 110, air inlet; 120, exhaust port; 130, first muffler chamber; 140, second muffler chamber; 150, third muffler chamber; 160, fourth muffler chamber; 171, first baffle; 172, second baffle; 1721, second vent; 173, third baffle; 1731, through hole;
[0029] 200, air intake pipe; 210, first air vent; 220, fourth air vent;
[0030] 300, exhaust pipe;
[0031] 400, core tube; 410, third vent hole;
[0032] 500, sound absorbing materials;
[0033] 600, reinforcement bar;
[0034] 700, heat shield;
[0035] 800, hanging assembly; 810, lifting lug; 812, second connecting hole; 820, hook;
[0036] 900, first external pipe; 910, second external pipe. DETAILED DESCRIPTION
[0037] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.
[0038] In the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0040] In the description of this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise expressly limited. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.
[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.
[0042] In order to reduce the exhaust noise of vehicles, a muffler is usually installed in the vehicle's exhaust system. Mufflers are generally divided into resistive mufflers and reactive mufflers. Resistive mufflers have a better muffler effect on medium and high frequency sound waves, but a poor muffler effect on low frequency sound waves. Reactive mufflers have a better muffler effect on medium and low frequency sound waves, but a poor muffler effect on high frequency sound waves. Therefore, it is difficult to achieve an ideal muffler effect with a single resistive muffler or reactive muffler. Among them, the resistive muffler reduces noise by placing sound-absorbing materials inside the muffler. When sound waves enter the resistive muffler, they cause the air and fine fibers in the pores of the sound-absorbing material to vibrate. Due to friction and viscous resistance, the sound energy is converted into heat energy and absorbed, thereby playing a role in muffler. Reactive mufflers use resonance cavities and expansion chambers to muffle noise. Sound waves reflect and interfere at the interface where the acoustic impedance suddenly changes, thereby achieving the effect of muffler.
[0043] Some vehicles are equipped with both resistive and reactive mufflers to improve noise reduction, but this takes up more chassis space and increases production and processing costs.
[0044] Based on the above situation, an embodiment of the first aspect of the present application provides a muffler for an exhaust system, which aims to achieve better muffler effect while reducing the space occupied by the vehicle chassis and saving production and processing costs.
[0045] Figure 1 This is a schematic diagram of the structure of a muffler provided in one embodiment of the present application. Figure 2 for Figure 1 The enlarged schematic diagram of part A in the figure is as follows: Figure 3 This is a schematic structural diagram of a muffler provided in one embodiment of the present application from another perspective. Figure 4 This is a schematic diagram of the internal structure of a muffler provided in one embodiment of the present application. Figure 5 This is a schematic diagram of the internal structure of a muffler provided in one embodiment of the present application (sound-absorbing material is omitted).
[0046] like Figures 1 to 5As shown, the muffler 10 for an exhaust system provided in an embodiment of the present application includes a muffler housing 100, an air inlet pipe 200, an air outlet pipe 300, and a core pipe 400. The muffler housing 100 has an air inlet 110 at one end and an air outlet 120 at the other end. The interior of the muffler housing 100 is provided with a first muffler chamber 130, a second muffler chamber 140, a third muffler chamber 150, and a fourth muffler chamber 160, sequentially arranged from the side close to the air inlet 110 to the side away from the air inlet 110. The third muffler chamber 150 is connected to the fourth muffler chamber 160. The air inlet pipe 200 has one end connected to the air inlet 110 and the other end extending to the fourth muffler chamber 160. The air outlet pipe 300 has one end connected to the air outlet 120 and the other end extending to the first muffler chamber 130. The core pipe 400 connects the first muffler chamber 130 with the third muffler chamber 150. A sound-absorbing material 500 is provided in the second muffler chamber 140. A first vent 210 is provided in the portion of the air inlet pipe 200 located in the second muffler chamber 140. A second vent 1721 is provided on the sidewall of the second muffler chamber 140 that communicates with the third muffler chamber 150. For example, the sound-absorbing material 500 is sound-absorbing cotton or glass fiber.
[0047] When muffler 10 according to the embodiment of the present application is used for noise reduction, airflow first enters the interior of muffler housing 100 through air intake pipe 200. Part of the airflow in air intake pipe 200 enters fourth muffler chamber 160, while another part of the airflow enters second muffler chamber 140. The air intake pipe 200 and fourth muffler chamber 160 form an expansion chamber. When airflow enters fourth muffler chamber 160 from air intake pipe 200, sound waves are reflected and interfered, thus achieving reactive noise reduction in the mid- and low-frequency bands.
[0048] The first vent 210 and the second muffler chamber 140 form an expansion chamber. When air flows from the intake pipe 200 through the first vent 210 and into the second muffler chamber 140, sound waves are reflected and interfered with, resulting in resistive muffler noise reduction in the mid- and low-frequency bands. Furthermore, because the second muffler chamber 140 is provided with sound-absorbing material 500, the sound energy of the air entering the second muffler chamber 140 is absorbed by the sound-absorbing material 500, resulting in resistive muffler noise reduction in the mid- and high-frequency bands.
[0049] The airflow entering the fourth muffler chamber 160 further enters the third muffler chamber 150 connected to the fourth muffler chamber 160. The airflow entering the second muffler chamber 140 further enters the third muffler chamber 150 through the second vent 1721. The second vent 1721 and the third muffler chamber 150 form a resonant cavity, so the airflow also undergoes reactive noise reduction when passing through the second vent 1721 and entering the third muffler chamber 150.
[0050] The airflow entering the third muffler chamber 150 passes through the core tube 400 and enters the first muffler chamber 130. The core tube 400 and the first muffler chamber 130 form an expansion chamber. Therefore, after the airflow enters the first muffler chamber 130 through the core tube 400, it also undergoes resistive muffler. The airflow entering the first muffler chamber 130 is eventually discharged through the exhaust pipe.
[0051] In summary, during operation, the muffler 10 for the exhaust system in the embodiment of the present application undergoes multiple cycles of reactive muffler silencing in the mid- and low-frequency bands and resistive muffler silencing in the mid- and high-frequency bands within the muffler housing 100, resulting in a better muffler effect. Furthermore, the muffler 10 for the exhaust system in the embodiment of the present application integrates the functions of both a resistive muffler 10 and a reactive muffler 10, eliminating the need for multiple mufflers 10 in the vehicle's exhaust system. This reduces the space occupied by the vehicle chassis and saves production and processing costs.
[0052] like Figure 5 As shown, in some embodiments of the present application, the portion of the core tube 400 located in the second muffler chamber 140 is provided with a third vent 410. With this arrangement, when the airflow entering the third muffler chamber 150 passes through the core tube 400, part of the airflow will enter the second muffler chamber 140 through the third vent 410. Since the third vent 410 and the second muffler chamber 140 also form an expansion chamber, and the second muffler chamber 140 is provided with a sound-absorbing material 500, this part of the airflow will also undergo mid- and low-frequency resistive muffler and mid- and high-frequency resistive muffler after entering the second muffler chamber 140. In this way, the muffler effect of the muffler 10 can be further improved.
[0053] Furthermore, the third vent holes 410 are provided in a plurality and arranged in an array. This arrangement allows the airflow to enter the second muffler chamber 140 from the core tube 400 in a uniformly diffused manner, thereby increasing the flow rate of the airflow entering the second muffler chamber 140 from the core tube 400, thereby facilitating an increase in the circulation speed of the airflow within the muffler 10.
[0054] like Figure 5 As shown, in some embodiments of the present application, there are multiple second vent holes 1721, and the multiple second vent holes 1721 are distributed in an array. This arrangement allows the airflow entering the second muffler chamber 140 to enter the third muffler chamber 150 in a uniformly diffused manner, which is beneficial to increasing the flow rate of the airflow when it enters the third muffler chamber 150 from the second muffler chamber 140, thereby increasing the flow speed of the airflow within the muffler 10.
[0055] like Figure 4 、 Figure 5As shown, the second vent hole 1721 is provided on the second partition plate 172 , the third partition plate 173 is provided with a through hole 1731 , and the third muffler chamber 150 is communicated with the fourth muffler chamber 160 through the through hole 1731 .
[0056] The first partition plate 171, the second partition plate 172, and the third partition plate 173 can be fixedly connected to the muffler housing 100 by means of fasteners such as screws and rivets, or can be fixedly connected to the muffler housing 100 by welding. In order to improve the sealing performance after the first partition plate 171, the second partition plate 172, and the third partition plate 173 are connected to the muffler housing 100, sealing rings can be provided at the connection portions between the partition plates and the muffler housing 100, or sealant can be applied.
[0057] That is, the first partition plate 171, the second partition plate 172, the third partition plate 173 and the muffler housing 100 can be separately manufactured and formed, and then the first partition plate 171, the second partition plate 172 and the third partition plate 173 are connected to the muffler housing 100, thereby constructing the first muffler chamber 130, the second muffler chamber 140, the third muffler chamber 150 and the fourth muffler chamber 160 inside the muffler housing 100. This implementation method has a relatively low process difficulty and is conducive to improving the manufacturing efficiency of the muffler 10.
[0058] like Figure 5 As shown, in one embodiment, the second baffle 172 and the third baffle 173 are connected by a reinforcing rod 600, and / or the first baffle 171 and the second baffle 172 are connected by a reinforcing rod 600. The provision of the reinforcing rod 600 can improve the structural strength and rigidity of the second baffle 172 and the third baffle 173, and / or the structural strength and rigidity of the first baffle 171 and the second baffle 172. This can enhance the ability of the corresponding baffles to resist structural damage or deformation, thereby improving the operating stability of the muffler 10.
[0059] like Figure 4 、 Figure 5 As shown, in some embodiments of the present application, a portion of the air intake pipe 200 located within the first muffler chamber 130 is provided with a plurality of fourth vents 220. This allows a portion of the airflow within the air intake pipe 200 to enter the first muffler chamber 130 through the fourth vents 220. Since the fourth vents 220 and the first muffler chamber 130 form an expansion chamber, this portion of the airflow, after entering the first muffler chamber 130, undergoes reactive muffler noise reduction in the mid- and low-frequency bands.
[0060] like Figure 3As shown, in some embodiments of the present application, the muffler 10 for the exhaust system further includes a heat shield 700, which is disposed on the outer surface of the muffler housing 100. The heat shield 700 can isolate heat, thereby protecting the structural parts around the muffler 10, thereby preventing the structural parts around the muffler 10 from being affected by high temperature and causing structural damage or malfunction.
[0061] It is understood that the placement of the heat shield 700 can be selected based on actual needs. For example, if there are structural components susceptible to high temperatures located around the muffler 10, the heat shield 700 can be installed at the corresponding location on the muffler housing 100. Of course, the heat shield 700 can also cover the entire surface of the muffler housing 100, thereby providing more comprehensive protection for the structural components surrounding the muffler cavity.
[0062] like Figure 1 、 Figure 2 As shown, in some embodiments of the present application, the muffler 10 for an exhaust system further includes a hanging assembly 800 disposed on the muffler housing 100. The hanging assembly 800 is used to connect the muffler housing 100 to the vehicle frame in a hanging manner. This helps to improve the connection efficiency between the muffler housing 100 and the vehicle frame.
[0063] like Figure 2 As shown, further, the hanging assembly 800 may include a lifting lug 810 and a hook 820. The lifting lug 810 has a first connection hole (not shown) and a second connection hole 812. One end of the hook 820 is connected to the muffler housing 100, and the other end of the hook 820 is inserted into the first connection hole. The vehicle frame has a frame hook 820, and the second connection hole 812 of the lifting lug 810 is used to connect to the frame hook 820. When installing the muffler housing 100 to the vehicle frame, it is only necessary to pass the frame hook 820 through the second connection hole 812 of the lifting lug 810, which is highly efficient.
[0064] The hanging ear 810 may be a rubber hanging ear 810 , so as to reduce the transmission of the vibration of the muffler 10 to the vehicle body.
[0065] Figure 6 This is a schematic structural diagram of a muffler provided in another embodiment of the present application. Figure 7 This is a schematic diagram of the structure of a muffler provided in another embodiment of the present application from another perspective. Figure 6 、 Figure 7As shown, in some embodiments of the present application, the muffler 10 for the exhaust system further includes a first external tube 900 and a second external tube 910, both of which are located outside the muffler shell 100, the first external tube 900 being installed at the air inlet 110 and being connected to the air inlet pipe 200, and the second external tube 910 being installed at the exhaust port 120 and being connected to the air outlet pipe 300.
[0066] By providing a first external pipe 900, the engine exhaust can be introduced into the intake pipe 200, thereby allowing the engine exhaust to enter the muffler housing 100. By providing a second external pipe 910, the gas after the noise reduction treatment can be guided to the exhaust pipe of the vehicle, so that the noise-reduced gas is finally discharged from the exhaust pipe of the vehicle.
[0067] An embodiment of a second aspect of the present application provides a vehicle, which includes the muffler 10 for an exhaust system according to any one of the above embodiments.
[0068] In the vehicle of the embodiment of the present application, the muffler 10 for the exhaust system, during operation, causes the airflow within the muffler housing 100 to undergo multiple cycles of reactive muffler reduction in the mid- and low-frequency bands and resistive muffler reduction in the mid- and high-frequency bands, thereby achieving a better muffler effect. Furthermore, the muffler 10 for the exhaust system of the embodiment of the present application integrates the functions of both a resistive muffler 10 and a reactive muffler 10, eliminating the need for multiple mufflers 10 in the vehicle's exhaust system. This helps reduce the space occupied by the vehicle chassis and saves production and processing costs.
[0069] The above content is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.
Claims
1. A muffler for an exhaust system, characterized in that: include: A muffler shell, wherein one end of the muffler shell is provided with an air inlet and the other end is provided with an exhaust port, and the interior of the muffler shell is provided with a first muffler chamber, a second muffler chamber, a third muffler chamber, and a fourth muffler chamber in sequence from the side close to the air inlet to the side away from the air inlet, and the third muffler chamber is connected to the fourth muffler chamber; an air intake pipe, one end of which is connected to the air inlet and the other end of which extends to the fourth muffler chamber; an air outlet pipe, one end of which is connected to the exhaust port and the other end of which extends to the first muffler chamber; as well as a core tube, the core tube communicating with the first muffler chamber and the third muffler chamber; A sound absorbing material is provided in the second muffler cavity, a first vent is provided in the portion of the air inlet pipe located in the second muffler cavity, and a second vent communicating with the third muffler cavity is provided on the side wall of the second muffler cavity.
2. The muffler for an exhaust system according to claim 1, characterized in that: The portion of the core tube located in the second muffler chamber is provided with a third vent hole.
3. The muffler for an exhaust system according to claim 2, characterized in that: There are multiple third ventilation holes, and the multiple third ventilation holes are distributed in an array.
4. The muffler for an exhaust system according to claim 1, characterized in that: There are multiple second ventilation holes, and the multiple second ventilation holes are distributed in an array.
5. The muffler for an exhaust system according to claim 1, characterized in that: The interior of the muffler housing is provided with a first partition plate, a second partition plate, and a third partition plate, wherein the first partition plate, the second partition plate, and the third partition plate divide the inner cavity of the muffler housing into the first muffler chamber, the second muffler chamber, the third muffler chamber, and the fourth muffler chamber; The second vent hole is provided on the second partition plate, the third partition plate is provided with a through hole, and the third muffler chamber is communicated with the fourth muffler chamber through the through hole.
6. The muffler for an exhaust system according to claim 5, characterized in that: The second partition plate and the third partition plate are connected by a reinforcing rod; And / or, the first partition plate and the second partition plate are connected by a reinforcing rod.
7. The muffler for an exhaust system according to claim 1, characterized in that: The portion of the air inlet pipe located in the first muffler cavity is provided with a plurality of fourth vent holes.
8. The muffler for an exhaust system according to claim 1, characterized in that: It also includes a heat insulation cover, which is arranged on the outer surface of the muffler shell.
9. The muffler for an exhaust system according to claim 1, characterized in that: Also included is a hanging assembly disposed on the muffler housing; And / or, it also includes a first external tube and a second external tube, both of which are located outside the muffler shell, the first external tube is installed at the air inlet and is connected to the air inlet pipe, and the second external tube is installed at the exhaust port and is connected to the exhaust pipe.
10. A vehicle, characterized in that: A muffler for an exhaust system comprising the muffler according to any one of claims 1 to 9.