Silencer, exhaust system and vehicle

Abstract

The utility model relates to a silencer, an exhaust system and a vehicle. The silencer comprises a shell, a partition plate and an air outlet pipe. The shell is provided with an air outlet, an air inlet and a mounting cavity. The partition plate is arranged in the mounting cavity to divide the mounting cavity into a first chamber and a second chamber, and a plurality of communicating holes are formed in the partition plate; the two ends of the air outlet pipe communicate with the second cavity and the air outlet hole correspondingly. A first air hole is formed in the portion, located in the first cavity, of the air outlet pipe. According to the air conditioner, airflow entering the first cavity through the air inlet is divided into two parts, the first part of airflow enters the air outlet pipe through the first air hole, and the second part of airflow enters the air outlet pipe through the communicating hole and the second cavity. The two parts of air flow meet in the air outlet pipe and interfere with each other due to the fact that phase difference exists between the two parts of air flow, and therefore vibration of air molecules is weakened or even completely counteracted, and noise elimination is achieved. Therefore, the driving comfort of a driver and passengers can be improved, and the noise pollution of the vehicle to the surrounding environment is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a muffler, an exhaust system and a vehicle. BACKGROUND

[0002] At present, the driving force of an automobile is mainly provided by an engine. The working process of the engine usually consists of four strokes of intake, compression, work and exhaust. The engine repeatedly performs the four strokes to convert the chemical energy of fuel into mechanical energy, thereby providing power for the automobile. In the exhaust stroke, the piston moves from the bottom dead center to the top dead center, at which time the exhaust valve is opened and the intake valve is closed. The burned exhaust gas is discharged from the cylinder through the exhaust valve under the push of the piston, thereby preparing for the next working cycle. Since the exhaust gas is discharged at a high speed through the exhaust valve, the strong airflow impacting the exhaust pipe will generate strong vibration and noise.

[0003] The noise generated during the exhaust of the engine is large, which can easily damage the hearing of the driver and passengers, and can also cause noise pollution to the environment around the vehicle. CONTENT OF THE INVENTION

[0004] The present application provides a muffler, which can reduce the noise generated during the exhaust of the engine, in particular the low-frequency noise, to at least solve the above technical problems.

[0005] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a muffler is provided, which comprises a shell, a partition plate and an outlet pipe; the shell has an outlet hole, an inlet hole and a mounting cavity; the partition plate is arranged in the mounting cavity to divide the mounting cavity into a first chamber and a second chamber, and a plurality of communication holes are arranged on the partition plate; the two ends of the outlet pipe are respectively communicated with the second chamber and the outlet hole; wherein part of the outlet pipe is located in the first chamber, and a first gas hole is arranged at the part of the outlet pipe located in the first chamber, and the two ends of the first gas hole are respectively communicated with the first chamber and the internal passage of the outlet pipe.

[0006] Optionally, the muffler further comprises an inner pipe, and the two ends of the inner pipe are respectively communicated with the first chamber and the second chamber.

[0007] Optionally, the muffler further comprises an inlet pipe and a first partition plate, the first partition plate is arranged in the first chamber to divide the first chamber into a first inner cavity and a second inner cavity, a plurality of first through holes are arranged on the first partition plate, the first inner cavity is communicated with the second inner cavity through the first through holes, and the second inner cavity is communicated with the second chamber through the communication holes; wherein the inlet hole is arranged on the shell wall for forming the first inner cavity, one end of the inlet pipe is communicated with the inlet hole, and the other end of the inlet pipe is communicated with the second inner cavity through the first partition plate, and the first gas hole is arranged at the part of the outlet pipe located in the second inner cavity.

[0008] Optionally, the diameter of the first through hole is not more than 3mm.

[0009] Optionally, the silencer further includes a second partition plate disposed in the second chamber to divide the second chamber into a third inner chamber and a fourth inner chamber. The second partition plate is provided with a plurality of second through holes. The third inner chamber is connected to the first chamber through a connecting hole, and the third inner chamber is connected to the fourth inner chamber through the second through holes. The air inlet end of the air outlet pipe is connected to the fourth inner chamber. The end of the inner tube away from the first chamber passes through the third inner chamber and is connected to the fourth inner chamber. A second air hole is provided at the location of the inner tube in the third inner chamber, and the two ends of the second air hole are connected to the internal channels of the third inner chamber and the inner tube, respectively. Part of the air outlet pipe is located in the third inner chamber, and a third air hole is provided at the location of the air outlet pipe in the third inner chamber. The two ends of the third air hole are connected to the internal channels of the third inner chamber and the air outlet pipe, respectively.

[0010] Optionally, the vent pipe includes a bent section and a first straight section and a second straight section arranged in parallel. The bent section is located in the first chamber. One end of the first straight section and one end of the second straight section are respectively connected to the two ends of the bent section. The other ends of the first straight section and the second straight section both pass through the third inner cavity and enter the third cavity. The vent hole is located on the shell wall of the outer shell used to form the fourth inner cavity. The end of the second straight section away from the bent section is connected to the vent hole. A first vent hole is provided at the location of the first straight section in the first chamber. A third vent hole is provided at the location of the second straight section in the third inner cavity. The two ends of the third vent hole are respectively connected to the internal channels of the third inner cavity and the second straight section.

[0011] Optionally, sound-absorbing material is provided in the third inner cavity.

[0012] Optionally, the diameter of the second through hole shall not exceed 3 mm.

[0013] Optionally, the diameter of the connecting hole shall not exceed 3 mm.

[0014] Optionally, the outer casing includes a housing, a first end cap, and a second end cap; the housing is a cylindrical structure; the first end cap is connected to the housing and closes one end of the housing; the second end cap is connected to the housing and closes the other end of the housing; wherein, the outer casing, the first end cap, and the second end cap enclose an installation cavity, and the outer periphery of the partition plate is connected to the inner wall of the housing; the first chamber is located near the first end cap, and the second chamber is located near the second end cap; an air inlet is located on the housing or the first end cap, and an air outlet is located on the housing or the second end cap.

[0015] Optionally, the air inlet is located on the first end cover, and the air outlet is located on the second end cover.

[0016] Optionally, the silencer further includes a second partition plate disposed in the second chamber to divide the second chamber into a third inner chamber and a fourth inner chamber. The second partition plate is provided with a plurality of second through holes. The third inner chamber is connected to the first chamber through a connecting hole and to the fourth inner chamber through a second through hole. The air inlet end of the air outlet pipe is connected to the fourth inner chamber. Sound-absorbing material is disposed in the third inner chamber.

[0017] According to a second aspect of this application, an exhaust system is provided, the exhaust system including an exhaust manifold, an exhaust gas treatment pipe, an exhaust pipe, a tailpipe, and the aforementioned muffler; one end of the exhaust manifold is configured to communicate with the exhaust pipe of an engine; one end of the exhaust gas treatment pipe is connected to the other end of the exhaust manifold; one end of the exhaust pipe is connected to the other end of the exhaust gas treatment pipe; an intake port is connected to the other end of the exhaust pipe; and one end of the tailpipe is connected to an outlet port.

[0018] According to a third aspect of this application, a vehicle is provided, the vehicle including an engine and the aforementioned exhaust system; the engine has an exhaust port; the exhaust port is connected to the end of an exhaust manifold away from the exhaust gas treatment pipe.

[0019] In the muffler of this embodiment, the airflow entering the first chamber through the air inlet is divided into two parts: a first part and a second part. The first part enters the outlet pipe through a first air hole, and the second part enters the second chamber through a connecting hole, and then enters the outlet pipe. The first and second parts of the airflow meet in the outlet pipe, and there is a phase difference between them. This causes the first and second parts of the airflow to interfere with each other, weakening or even completely canceling the vibration of air molecules, thereby achieving noise reduction. This improves the driving comfort of passengers and reduces noise pollution from the vehicle to the surrounding environment.

[0020] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0023] Figure 1 This is a schematic diagram of the structure of the first type of muffler 10 provided in an exemplary embodiment of this disclosure;

[0024] Figure 2 This is a schematic diagram of the structure of the second type of muffler 10 provided in an exemplary embodiment of this disclosure;

[0025] Figure 3 This is a schematic diagram of the structure of the third type of muffler 10 provided in the exemplary embodiments of this disclosure;

[0026] Figure 4 This is a schematic diagram of the structure of the fourth type of muffler 10 provided in the exemplary embodiments of this disclosure;

[0027] Figure 5 This is a schematic diagram of the structure of the fifth type of muffler 10 provided in the exemplary embodiments of this disclosure;

[0028] Figure 6 This is a schematic diagram of the structure of the sixth type of muffler 10 provided in the exemplary embodiments of this disclosure;

[0029] Figure 7 This is a schematic diagram of the pipe and baffle provided in an exemplary embodiment of this disclosure.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10-Silencer 10; 11-Outer shell; 111-First inner cavity; 112-Second inner cavity; 113-Third inner cavity; 114-Fourth inner cavity; 115-Mounting cavity; 1151-First chamber; 1152-Second chamber; 116-Air outlet; 117-Air inlet; 118-Shell; 119a-First end cap; 119b-Second end cap;

[0032] 12-Separator; 121-Connecting hole;

[0033] 13-Outlet pipe; 131-First vent; 132-Third vent; 133-First straight pipe section; 134-Second straight pipe section; 135-Bend section;

[0034] 14 - Intake pipe;

[0035] 15-Inner tube; 151-Second vent;

[0036] 161-First partition; 1611-First through hole; 162-Second partition; 1621-Second through hole;

[0037] 17-Sound-absorbing materials;

[0038] 181 - First part of the airflow; 182 - Second part of the airflow; 183 - Third part of the airflow. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0040] Before introducing the muffler 10, exhaust system and vehicle provided by the embodiments of this application, the relevant technology of this application will be introduced first.

[0041] In related technologies, traditional gasoline-powered vehicles are driven by an engine, and the exhaust noise is mainly mid-to-high frequency, thus requiring the use of small holes and sound-absorbing materials for noise reduction. Hybrid electric vehicles (HEVs), on the other hand, are driven by both an engine and an electric motor. The engines in HEVs produce high torque at low speeds, and their exhaust noise is primarily mid-to-low frequency. Compared to traditional gasoline-powered vehicles, the low-frequency noise problem is particularly prominent in HEVs.

[0042] Therefore, a new muffler 10 needs to be designed for the operating conditions of hybrid vehicles to reduce low-frequency noise, especially low-frequency noise.

[0043] Based on this, the embodiments of this application provide a muffler 10, an exhaust system, and a vehicle, which can effectively reduce the low-frequency noise of automobiles, thereby improving the driving and riding comfort of passengers and reducing the noise pollution of the vehicle to the surrounding environment.

[0044] The following combination Figures 1 to 7 The present application provides a detailed description of a muffler 10, an exhaust system, and a vehicle, respectively, based on embodiments of the present application.

[0045] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a first type of muffler 10 provided in an exemplary embodiment of this disclosure. In a first aspect, embodiments of this application provide a muffler 10. The muffler 10 includes a housing 11, a partition plate 12, and an exhaust pipe 13. The housing 11 has an exhaust port 116, an intake port 117, and a mounting cavity 115. The partition plate 12 is disposed in the mounting cavity 115 to divide the mounting cavity 115 into a first chamber 1151 and a second chamber 1152. The partition plate 12 has a plurality of connecting holes 121. The two ends of the exhaust pipe 13 are connected to the second chamber 1152 and the exhaust port 116, respectively. A portion of the exhaust pipe 13 is located in the first chamber 1151. A first vent 131 is provided at the location of the exhaust pipe 13 in the first chamber 1151. The two ends of the first vent 131 are connected to the first chamber 1151 and the internal channel of the exhaust pipe 13, respectively.

[0046] It can be understood that the first chamber 1151 is the expansion chamber of the muffler 10, and the second chamber 1152 is the silencing chamber of the muffler 10, thus forming the basic silencing unit of the muffler 10.

[0047] It is understood that the connecting hole 121 connects the first chamber 1151 and the second chamber 1152.

[0048] For example, the outer periphery of the partition plate 12 is interference-fitted with the cavity wall of the inner cavity, or glued, welded, or connected by screws.

[0049] For example, there are multiple first air holes 131, which are spaced apart circumferentially along the air outlet pipe 13. The diameter of the first air outlet 116 does not exceed 3 mm, so that the first air hole 131 has a large acoustic impedance and improves the noise reduction effect of the first air outlet.

[0050] Specifically, the gas discharged from the engine's exhaust port enters the first chamber 1151 through the intake port 117. The airflow entering the first chamber 1151 through the intake port is divided into two parts: a first part airflow 181 and a second part airflow 182. Among them, as... Figure 1 As shown, the first airflow 181 enters the exhaust pipe 13 through the first air hole 131, and the second airflow 182 enters the second chamber 1152 through the connecting hole 121, and then enters the exhaust pipe 13. The first airflow 181 and the second airflow 182 meet in the exhaust pipe 13, and there is a phase difference between the first airflow 181 and the second airflow 182, which causes the first airflow 181 and the second airflow 182 to interfere with each other, thereby weakening or even completely canceling the vibration of air molecules, thus achieving noise reduction. In this way, the driving and riding comfort of the passengers can be improved, and the noise pollution of the vehicle to the surrounding environment can be reduced. Finally, the noise-reduced airflow is discharged from the exhaust hole 116.

[0051] It is understood that the muffler 10 provided in this embodiment mainly reduces mid-to-low frequency noise, especially low-frequency noise. When the muffler 10 provided in this embodiment is applied to an automobile, a high-frequency muffler also needs to be configured. For example, a high-frequency muffler filled with sound-absorbing material 17 can be configured in series with the muffler 10 provided in this embodiment to reduce mid-to-high frequency noise, especially high-frequency noise, by utilizing the porous sound absorption effect and / or resonant sound absorption effect of the sound-absorbing material 17. Alternatively, a chamber can be added inside the muffler 10 provided in this embodiment to fill with sound-absorbing material 17 to reduce mid-to-high frequency noise.

[0052] Furthermore, when the airflow enters the exhaust pipe 13, the airflow will collide with the inner wall of the exhaust pipe 13, thereby dissipating the sound energy through the exhaust pipe 13 and achieving the effect of noise reduction.

[0053] Furthermore, when the airflow passes through the first air hole 131 and the connecting hole 121, it causes the air column inside these holes to vibrate, resulting in friction between the air column and the hole wall, and creating viscous resistance between air molecules. The friction and viscous resistance convert the energy of the sound wave into heat energy, thereby dissipating the sound energy and achieving the effect of noise reduction.

[0054] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of a second type of muffler 10 provided in an exemplary embodiment of this disclosure. In some embodiments, the muffler 10 further includes an inner tube 15. The two ends of the inner tube 15 are respectively connected to the first chamber 1151 and the second chamber 1152.

[0055] It is understandable that the inner tube 15 is a straight tube, which passes through the partition plate 12.

[0056] For example, the partition plate 12 is provided with mounting holes, the inner tube 15 passes through the mounting holes and is interference-fitted with the mounting holes, or glued or welded.

[0057] Specifically, the gas discharged from the engine's exhaust port enters the first chamber 1151 through the intake port 117. The airflow entering the first chamber 1151 is divided into three parts: a first part airflow 181, a second part airflow 182, and a third part airflow 183. For example... Figure 2 As shown, the first airflow 181 enters the exhaust pipe 13 through the first air hole 131 and is discharged from the exhaust hole 116 under the guidance of the exhaust pipe 13. The second airflow 182 enters the second chamber 1152 through the connecting hole 121, then enters the exhaust pipe 13, and is discharged from the exhaust hole 116 under the guidance of the exhaust pipe 13. The third airflow 183 enters the second chamber 1152 through the inner pipe 15, then enters the exhaust pipe 13, and is discharged from the exhaust hole 116 under the guidance of the exhaust pipe 13. When the first airflow 181, the second airflow 182, and the third airflow 183 meet in the exhaust pipe 13, there is a phase difference between them. This causes the first airflow 181, the second airflow 182, and the third airflow 183 to interfere with each other, weakening or even completely canceling the vibration of air molecules, thereby achieving noise reduction. This can improve the driving and riding comfort of passengers and reduce noise pollution from vehicles to the surrounding environment.

[0058] Please see Figure 3 , Figure 3This is a schematic diagram of the structure of a third type of muffler 10 provided in an exemplary embodiment of this disclosure. In some embodiments, the muffler 10 further includes an air inlet pipe 14 and a first partition 161. The first partition 161 is disposed in the first chamber 1151 to divide the first chamber 1151 into a first inner chamber 111 and a second inner chamber 112. The first partition 161 is provided with a plurality of first through holes 1611. The first inner chamber 111 communicates with the second inner chamber 112 through the first through holes 1611. The second inner chamber 112 communicates with the second chamber 1152 through a connecting hole 121. An air inlet 117 is disposed on the shell wall of the outer shell 11 used to form the first inner chamber 111. One end of the air inlet pipe 14 communicates with the air inlet 117, and the other end passes through the first partition 161 and communicates with the second inner chamber 112. The air outlet pipe 13 is provided with a first air hole 131 at the location of the second inner chamber 112.

[0059] The connection method between the first partition 161 and the outer shell 11 can be the same as or different from the connection method between the partition 12 and the outer shell 11.

[0060] It can be understood that the gas discharged from the engine's exhaust port enters the first chamber 1151 through the intake port 117. The airflow entering the first chamber 1151 is divided into three parts: a first part airflow 181, a second part airflow 182, and a third part airflow 183. For example... Figure 3 As shown, the first part of the airflow 181 enters the exhaust pipe 13 through the first air hole 131. The second part of the airflow 182 enters the second chamber 1152 through the connecting hole 121, and then enters the exhaust pipe 13. The third part of the airflow 183 enters the first inner cavity 111 through the first through hole 1611, and then enters the second chamber 1152 through the inner tube 15, and then enters the exhaust pipe 13, and is then discharged from the exhaust hole 116 under the guidance of the exhaust pipe 13.

[0061] Without the first partition 161, the air inlet of the inner tube 15 is large and the first air hole 131 is small, which causes more airflow to enter the first inner cavity 111 through the first through hole 1611. This results in less airflow entering the outlet pipe 13 through the first air hole 131, which in turn results in a smaller flow rate of the first part of the airflow 181 entering the outlet pipe 13 through the first air hole 131. Consequently, the noise reduction effect of the first part of the airflow 181 interfering with other airflows is poor.

[0062] Based on this, in this embodiment, by setting the first partition 161, the airflow entering the second inner cavity 112 from the air inlet 117 can pass more through the first air inlet 131 into the air outlet pipe 13, thereby increasing the flow rate of the first part of the airflow 181, thereby improving the noise reduction effect of the first part of the airflow 181 interfering with other airflows, and thus improving the noise reduction capability of the muffler 10.

[0063] In some embodiments, the diameter of the first through hole 1611 does not exceed 3 mm.

[0064] For example, the diameter of the first through hole 1611 includes, but is not limited to, 0.1mm, 0.5mm, 0.8mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 2.9mm, 3.0mm, and 3mm.

[0065] It is understandable that in pinhole noise reduction, the smaller the aperture, the greater the resistance to sound wave propagation within the pinhole, i.e., the greater the acoustic impedance. This is because the pinhole restricts the movement of air molecules, intensifying friction and collisions between air molecules and between air molecules and the pinhole wall, thus increasing acoustic resistance. Simultaneously, the elasticity and inertial characteristics of the pinhole also change, leading to alterations in acoustic impedance. Therefore, the smaller the aperture of the first through-hole 1611, the greater the impedance. Greater impedance means that as sound waves pass through the first through-hole 1611, more sound energy is converted into heat or other forms of energy to overcome the impedance, effectively attenuating the sound wave energy and resulting in a better noise reduction effect.

[0066] Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of a fourth type of muffler 10 provided in an exemplary embodiment of this disclosure. In some embodiments, the muffler 10 further includes a second partition 162. The second partition 162 is disposed in the second chamber 1152 to divide the second chamber 1152 into a third inner chamber 113 and a fourth inner chamber 114. The second partition 162 is provided with a plurality of second through holes 1621. The third inner chamber 113 is connected to the first chamber 1151 through a connecting hole 121, and the third inner chamber 113 is connected to the fourth inner chamber 114 through the second through holes 1621. The air inlet end of the air outlet pipe 13 is connected to the fourth inner chamber 114. One end of the inner pipe 15 away from the first chamber 1151 passes through the third inner chamber 113 and is connected to the fourth inner chamber 114. A second air hole 151 is provided at the location of the inner pipe 15 in the third inner chamber 113. The two ends of the second air hole 151 are connected to the third inner chamber 113 and the internal channel of the inner pipe 15, respectively. Part of the vent pipe 13 is located in the third inner cavity 113. A third vent 132 is provided at the location of the vent pipe 13 in the third inner cavity 113. The two ends of the third vent 132 are respectively connected to the internal channels of the third inner cavity 113 and the vent pipe 13.

[0067] The connection method between the second partition 162 and the outer shell 11 can be the same as or different from the connection method between the partition 12 and the outer shell 11.

[0068] It can be understood that the gas discharged from the engine's exhaust port enters the first chamber 1151 through the intake port 117. A portion of the airflow in the first chamber 1151 enters the third inner chamber 113 through the connecting hole 121. The airflow entering the third inner chamber 113 is divided into two parts: a first sub-part and a second sub-part. The first sub-part enters the fourth chamber through the second through hole 1621 and then enters the exhaust pipe 13; the second sub-part enters the exhaust pipe 13 through the third air hole 132, creating a phase difference with the airflow in the exhaust pipe 13, thus interfering with each other and reducing noise. In this way, the noise reduction capability of the muffler 10 can be improved.

[0069] Please see Figure 4 In some embodiments, the vent pipe 13 includes a bent section 135 and a first straight section 133 and a second straight section 134 arranged in parallel. The bent section 135 is located in the first chamber 1151. One end of the first straight section 133 and one end of the second straight section are respectively connected to the two ends of the bent section 135. The other ends of the first straight section 133 and the second straight section 134 both pass through the third inner cavity 113 and then into the fourth inner cavity 114. A vent hole 116 is provided on the shell wall of the outer shell 11 used to form the fourth inner cavity 114. The end of the second straight section 134 away from the bent section 135 communicates with the vent hole 116. A first vent hole 131 is provided at the location of the first straight section 133 in the first chamber 1151. A third vent hole 132 is provided at the location of the second straight section 134 in the third inner cavity 113. The two ends of the third vent hole 132 communicate with the internal channels of the third inner cavity 113 and the second straight section 134, respectively. In this way, the bending structure of the exhaust pipe 13 can be used to improve the performance of the exhaust pipe 13 in eliminating low-frequency noise, and the exhaust port 116 can be set away from the air inlet port 117. This allows the external pipes connected to the air inlet port 117 and the exhaust port 116 of the muffler 10 to have a larger operating space, thereby improving the ease of operation of connecting the muffler 10 with other components.

[0070] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of the fifth type of silencer 10 provided in an exemplary embodiment of this disclosure. In some embodiments, a sound-absorbing material 17 is disposed in the third inner cavity 113.

[0071] It is understandable that high-frequency noise is more noticeable when the engine is running at high speed. However, by setting the sound-absorbing material 17, not only can the high-frequency noise be reduced by the sound-absorbing material 17, but the muffler 10 provided in the embodiment of this application can also eliminate both low- and mid-frequency noise and high-frequency noise, without the need for an additional high-frequency muffler 10 connected in series, thereby improving the structural compactness of the high, medium and low-frequency mufflers 10 configured in the engine.

[0072] For example, the sound-absorbing material 17 includes, but is not limited to, glass wool, rock wool, foam, etc. Among them, the foam can be foamed metal or melamine foam.

[0073] In some embodiments, the diameter of the second through hole 1621 does not exceed 3 mm.

[0074] For example, the diameter of the second through hole 1621 includes, but is not limited to, 0.1mm, 0.5mm, 0.8mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 2.9mm, 3.0mm, and 3mm.

[0075] It's understandable that in pinhole noise reduction, the smaller the aperture, the greater the resistance to sound waves propagating within the aperture, resulting in higher acoustic impedance. This is because the pinhole restricts the movement of air molecules, intensifying friction and collisions between air molecules and between air molecules and the aperture wall, thus increasing acoustic resistance. Simultaneously, the elasticity and inertial properties of the pinhole also change, altering the acoustic impedance. Therefore, the smaller the aperture of the second through-hole 1621, the higher the impedance. Higher impedance means that as sound waves pass through the second through-hole 1621, more sound energy is converted into heat or other forms of energy to overcome the impedance, effectively attenuating the sound wave energy and resulting in better noise reduction.

[0076] In some embodiments, the diameter of the connecting hole 121 does not exceed 3 mm.

[0077] For example, the diameter of the connecting hole 121 includes, but is not limited to, 0.1mm, 0.5mm, 0.8mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 2.9mm, 3.0mm, and 3mm.

[0078] It is understandable that in pinhole noise reduction, the smaller the aperture, the greater the resistance to sound wave propagation within the pinhole, i.e., the greater the acoustic impedance. This is because the pinhole restricts the movement of air molecules, intensifying friction and collisions between air molecules and between air molecules and the pinhole wall, thus increasing acoustic resistance. Simultaneously, the elastic and inertial characteristics of the pinhole also change, leading to alterations in acoustic impedance. Therefore, the smaller the aperture of the connecting hole 121, the greater the impedance. Greater impedance means that as sound waves pass through the connecting hole 121, more acoustic energy is converted into heat or other forms of energy to overcome the impedance, effectively attenuating the sound wave energy and resulting in a better noise reduction effect.

[0079] Please see Figure 1 orFigure 2 or Figure 3 or Figure 4 or Figure 5 In some embodiments, the outer casing 11 includes a housing 118, a first end cap 119a, and a second end cap 119b. The housing 118 has a cylindrical structure. The first end cap 119a is connected to the housing 118 and closes one end of the housing 118. The second end cap 119b is connected to the housing 118 and closes the other end of the housing 118. The outer casing 11, the first end cap 119a, and the second end cap 119b together form a mounting cavity 115. The outer periphery of the partition plate 12 is connected to the inner wall of the housing 118. A first chamber 1151 is located near the first end cap 119a. A second chamber 1152 is located near the second end cap 119b. An air inlet 117 is located in the housing 118 or the first end cap 119a. An air outlet 116 is located in the housing 118 or the second end cap 119b. This design simplifies the overall structure of the outer casing 11, making it easier to manufacture and reducing manufacturing costs.

[0080] For example, the shell 118 has an elliptical cross-section and a thin-walled hollow structure.

[0081] Please see Figure 1 or Figure 2 or Figure 3 or Figure 4 or Figure 5 In some embodiments, the air inlet 117 is located on the first end cap 119a, and the air outlet 116 is located on the second end cap 119b. This arrangement, with the air outlet 116 positioned away from the air inlet 117, allows for greater operating space for external pipes connected to both the air inlet 117 and the air outlet 116 of the muffler 10, thus improving the ease of operation when connecting the muffler 10 to other components.

[0082] Please see Figure 5 In some embodiments, the silencer 10 further includes a second partition 162. The second partition 162 is disposed in the second chamber 1152 to divide the second chamber 1152 into a third inner chamber 113 and a fourth inner chamber 114. The second partition 162 is provided with a plurality of second through holes 1621. The third inner chamber 113 is connected to the first chamber 1151 through a connecting hole 121, and the third inner chamber 113 is connected to the fourth inner chamber 114 through the second through holes 1621. The air inlet end of the air outlet pipe 13 is connected to the fourth inner chamber 114. Sound-absorbing material 17 is disposed in the third inner chamber 113.

[0083] It is understood that one end of the third inner cavity 113 is connected to the first cavity 1151 through the connecting hole 121, and the other end is connected to the fourth inner cavity 114 through the second through hole 1621.

[0084] It is understandable that high-frequency noise is more noticeable when the engine is running at high speed. However, by setting the sound-absorbing material 17, not only can the high-frequency noise be reduced by the sound-absorbing material 17, but the muffler 10 provided in the embodiment of this application can also eliminate both low- and mid-frequency noise and high-frequency noise, without the need for an additional high-frequency muffler 10 connected in series, thereby improving the structural compactness of the high, medium and low-frequency mufflers 10 configured in the engine.

[0085] In some embodiments, such as Figure 6 The diagram shown is a structural schematic of a sixth type of muffler 10 provided in an exemplary embodiment of this disclosure. The muffler 10 includes a housing 11, an inner tube 15, an outlet pipe 13, an inlet pipe 14, sound-absorbing material, a partition plate 12, a first partition plate 161, and a second partition plate 162. The housing 11 has an outlet hole 116, an inlet hole 117, and a mounting cavity 115. The first partition plate 161, the partition plate 12, and the second partition plate 162 are sequentially disposed in the mounting cavity 115 to sequentially divide the mounting cavity 115 into a first inner cavity 111, a second inner cavity 112, a third inner cavity 113, and a fourth inner cavity 114. The first partition plate 161, the partition plate 12, and the second partition plate 162 are respectively provided with a first through hole 1611, a connecting hole 121, and a second through hole 1621, each with a diameter less than 3 mm. An exhaust pipe 13 passes through the first partition 161, the partition plate 12, and the second partition 162, with both ends of the exhaust pipe 13 communicating with the fourth inner cavity 114 and the exhaust port 116, respectively. An intake pipe 14 passes through the first partition 161, with both ends of the intake pipe 14 communicating with the air inlet and the second inner cavity 112, respectively. A first air hole 131 is provided at the location of the exhaust pipe 13 in the first inner cavity 111. Both ends of the first air hole 131 communicate with the internal channels of the first inner cavity 111 and the exhaust pipe 13, respectively. A third air hole 132 is provided at the location of the exhaust pipe 13 in the third inner cavity 113, near the exhaust port 116, with both ends of the third air hole 132 communicating with the internal channels of the third inner cavity 113 and the exhaust pipe 13, respectively. The inner tube 15 is provided with a second vent 151 at the location of the third inner cavity 113. The two ends of the second vent 151 are respectively connected to the internal channels of the third inner cavity 113 and the inner tube 15. The sound-absorbing material is filled in the third inner cavity 113.

[0086] It can be understood that the first inner cavity 111 is an expansion cavity, the second inner cavity 112 is an expansion cavity and a resonant cavity, the third inner cavity 113 is a resistive silencing cavity, and the fourth inner cavity 114 is a pure expansion silencing cavity.

[0087] It can be understood that the gas discharged from the engine's exhaust port enters the second inner cavity 112 through the intake port 117 and intake pipe 14. The airflow entering the second inner cavity 112 is divided into three parts: the first part airflow 181, the second part airflow 182, and the third part airflow 183. For example... Figure 6As shown, the first part of the airflow 181 enters the exhaust pipe 13 through the first vent 131. The second part of the airflow 182 enters the third inner cavity 113 through the connecting hole 121. The airflow entering the third inner cavity 113 can be divided into two parts: a first sub-part of airflow and a second sub-part of airflow. The first sub-part enters the inner tube 15 through the second vent 151, and the second sub-part enters the fourth inner cavity 114 through the second through hole 1621, and then enters the exhaust pipe 13. The third part of the airflow 183 enters the first inner cavity 111 through the first through hole 1611, and then enters the fourth inner cavity 114 through the inner tube 15, and then enters the exhaust pipe 13. Next, the airflows of each part interfere with each other in the exhaust pipe 13 due to the phase difference, thus achieving noise reduction. Finally, guided by the exhaust pipe 13, it is discharged from the exhaust hole 116.

[0088] The air outlet pipe 13, air inlet pipe 14, and inner pipe 15 are configured to cooperate with the partition plate 12, the first partition plate 161, and the second partition plate 162 as follows: Figure 7 As shown, Figure 7 This is a schematic diagram of the pipe and baffle provided in an exemplary embodiment of this disclosure.

[0089] According to a second aspect of this application, an exhaust system is provided. The exhaust system includes an exhaust manifold, an exhaust gas treatment pipe, an exhaust pipe, a tailpipe, and the aforementioned muffler 10. One end of the exhaust manifold is configured to communicate with the exhaust pipe of an engine. One end of the exhaust gas treatment pipe communicates with the other end of the exhaust manifold. One end of the exhaust pipe communicates with the other end of the exhaust gas treatment pipe. An intake port 117 communicates with the other end of the exhaust pipe. One end of the tailpipe communicates with an outlet port 116.

[0090] It is understood that when the muffler 10 provided in this embodiment is not equipped with sound-absorbing material 17, the exhaust system is also equipped with a high-frequency muffler 10.

[0091] It is understood that the exhaust system includes the aforementioned muffler 10, and the exhaust system has all the beneficial effects of the aforementioned muffler 10, which will not be repeated here.

[0092] According to a third aspect of this application, a vehicle is provided. The vehicle includes an engine and the aforementioned exhaust system. The engine has an exhaust port. The exhaust port is connected to the end of an exhaust manifold remote from the exhaust gas treatment pipe.

[0093] It is understood that the vehicle may be a gasoline-powered car, a plug-in hybrid electric vehicle, etc., and this disclosure does not make any specific restrictions.

[0094] It is understood that the vehicle includes the aforementioned exhaust system. The vehicle possesses all the beneficial effects of the aforementioned exhaust system, which will not be elaborated upon herein.

[0095] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0096] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0097] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0098] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A silencer (10), characterized in that, include: The outer casing (11) has an air outlet (116), an air inlet (117), and a mounting cavity (115); A partition plate (12) is disposed in the mounting cavity (115) to divide the mounting cavity (115) into a first chamber (1151) and a second chamber (1152). The partition plate (12) is provided with a plurality of connecting holes (121). The air outlet pipe (13) is connected at both ends to the second chamber (1152) and the air outlet (116), respectively; Among them, part of the air outlet pipe (13) is located in the first chamber (1151), and a first air hole (131) is provided at the part of the air outlet pipe (13) located in the first chamber (1151). The two ends of the first air hole (131) are respectively connected to the internal channels of the first chamber (1151) and the air outlet pipe (13).

2. The silencer (10) according to claim 1, characterized in that, The silencer (10) also includes an inner tube (15), the two ends of which are connected to the first chamber (1151) and the second chamber (1152) respectively.

3. The silencer (10) according to claim 2, characterized in that, The muffler (10) further includes an air inlet pipe (14) and a first partition (161). The first partition (161) is disposed in the first chamber (1151) to divide the first chamber (1151) into a first inner chamber (111) and a second inner chamber (112). The first partition (161) is provided with a plurality of first through holes (1611). The first inner chamber (111) is connected to the second inner chamber (112) through the first through holes (1611). The second inner chamber (112) is connected to the second chamber (1152) through the connecting hole (121). The air inlet (117) is disposed on the shell wall of the outer shell (11) used to form the first inner cavity (111). One end of the air inlet pipe (14) is connected to the air inlet (117), and the other end passes through the first partition (161) and is connected to the second inner cavity (112). The air outlet pipe (13) is provided with the first air hole (131) at the part of the second inner cavity (112).

4. The silencer (10) according to claim 3, characterized in that, The diameter of the first through hole (1611) does not exceed 3 mm.

5. The silencer (10) according to claim 2, characterized in that, The silencer (10) further includes a second partition (162), which is disposed in the second chamber (1152) to divide the second chamber (1152) into a third inner chamber (113) and a fourth inner chamber (114). The second partition (162) is provided with a plurality of second through holes (1621). The third inner chamber (113) is connected to the first chamber (1151) through the connecting hole (121), and the third inner chamber (113) is connected to the fourth inner chamber (114) through the second through holes (1621). The air inlet of the air outlet pipe (13) is connected to the fourth inner cavity (114); The end of the inner tube (15) away from the first chamber (1151) passes through the third inner cavity (113) and communicates with the fourth inner cavity (114); A second vent (151) is provided at the location of the inner tube (15) in the third inner cavity (113), and the two ends of the second vent (151) are respectively connected to the internal channels of the third inner cavity (113) and the inner tube (15); Part of the air outlet pipe (13) is located in the third inner cavity (113). A third air hole (132) is provided at the location of the air outlet pipe (13) in the third inner cavity (113). The two ends of the third air hole (132) are respectively connected to the internal channels of the third inner cavity (113) and the air outlet pipe (13).

6. The silencer (10) according to claim 5, characterized in that, The air outlet pipe (13) includes a bent section (135) and a first straight section (133) and a second straight section (134) arranged in parallel. The bent section (135) is located in the first chamber (1151). One end of the first straight section (133) and one end of the second straight section are respectively connected to the two ends of the bent section (135). The other ends of the first straight section (133) and the second straight section (134) pass through the third inner cavity (113) and then enter the fourth inner cavity (114). The vent (116) is disposed on the shell wall (134) of the outer shell (11) used to form the fourth inner cavity, and the end of the second straight pipe section (134) away from the bent pipe section (135) is connected to the vent (116); The first straight pipe section (133) is provided with the first air hole (131) at the location of the first chamber (1151); The second straight pipe section (134) is provided with the third air hole (132) at the location of the third inner cavity (113).

7. The silencer (10) according to claim 5 or 6, characterized in that, The third inner cavity (113) is provided with sound-absorbing material (17).

8. The silencer (10) according to claim 5 or 6, characterized in that, The diameter of the second through hole (1621) does not exceed 3 mm.

9. The silencer (10) according to any one of claims 1-6, characterized in that, The diameter of the connecting hole (121) does not exceed 3 mm.

10. The silencer (10) according to any one of claims 1-6, characterized in that, The outer casing (11) includes: The shell (118) is a cylindrical structure; A first end cap (119a) is connected to the housing (118) and closes one end of the housing (118); and, The second end cap (119b) is connected to the housing (118) and closes the other end of the housing (118); The outer shell (11), the first end cap (119a), and the second end cap (119b) enclose the mounting cavity (115), and the outer periphery of the partition plate (12) is connected to the inner wall of the shell (118). The first chamber (1151) is disposed near the first end cap (119a), and the second chamber (1152) is disposed near the second end cap (119b); The air inlet (117) is disposed on the housing (118) or the first end cap (119a), and the air outlet (116) is disposed on the housing (118) or the second end cap (119b).

11. The silencer (10) according to claim 10, characterized in that, The air inlet (117) is located on the first end cap (119a), and the air outlet (116) is located on the second end cap (119b).

12. The silencer (10) according to any one of claims 1-4, characterized in that, The silencer (10) further includes a second partition (162), which is disposed in the second chamber (1152) to divide the second chamber (1152) into a third inner chamber (113) and a fourth inner chamber (114). The second partition (162) is provided with a plurality of second through holes (1621). The third inner chamber (113) is connected to the first chamber (1151) through the connecting hole (121), and the third inner chamber (113) is connected to the fourth inner chamber (114) through the second through holes (1621). The air inlet of the air outlet pipe (13) is connected to the fourth inner cavity (114); The third inner cavity (113) is provided with sound-absorbing material (17).

13. An exhaust system, characterized in that, include: The exhaust manifold is configured to connect to the engine's exhaust pipe at one end. The exhaust gas treatment pipe is connected at one end to the other end of the exhaust manifold. An exhaust pipe, one end of which is connected to the other end of the exhaust gas treatment pipe; The muffler (10) as described in any one of claims 1-12, wherein the air inlet (117) is connected to the other end of the exhaust pipe; and, The exhaust pipe is connected at one end to the exhaust port (116).

14. A vehicle, characterized in that, include: An engine with an exhaust port; as well as, The exhaust system as claimed in claim 13, wherein the exhaust port is connected to the end of the exhaust manifold furthest from the exhaust gas treatment pipe.

Images