A silencer for automobile exhaust system

Abstract

The present invention discloses a silencer for an automobile exhaust system, which relates to the field of automobile exhaust technology, and specifically to a silencer for an automobile exhaust system, comprising a front-end connecting pipe, the right end of which is connected to a front-end silencer assembly, equidistantly distributed silencer bowls installed inside the front-end silencer assembly, a first audio sensor installed at the left end of the front-end silencer assembly, and a first speaker installed at the right end of the front-end silencer assembly. The silencer for an automobile exhaust system, by providing a front-end silencer assembly, utilizes the silencer bowl inside the front-end silencer assembly to silence the airflow. Each time the airflow passes through the silencer bowl, it expands, consuming a portion of energy, thereby achieving a silencing effect. At the same time, the first audio sensor can detect the noise spectrum, and then the first speaker emits a sound with the same spectrum as the noise but opposite phase, thereby neutralizing the noise and actively reducing the impact of the noise.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile exhaust, in particular to a silencer for an automobile exhaust system. Background Art

[0002] The automotive exhaust system primarily discharges engine exhaust gases while minimizing pollution and noise. It's primarily used in light vehicles, minivans, buses, motorcycles, and other motor vehicles. The exhaust system collects and discharges exhaust gases and generally consists of an exhaust manifold, exhaust pipe, catalytic converter, exhaust temperature sensor, muffler, and tailpipe.

[0003] Automobile mufflers are primarily used to reduce noise generated by a motor vehicle's engine and allow high-temperature exhaust gases to be discharged safely and effectively. The principle behind existing automobile mufflers is that the difference in length between the two pipes is equal to half the wavelength of the sound waves emitted by the vehicle. This causes the two sound waves to interfere with each other when superimposed, canceling out the sound intensity and reducing the sound, thereby achieving a muffler effect. This muffler method can reduce sound intensity, but the frequency of the sound remains within the audible range. At close range, a loud noise can still be heard, resulting in poor muffler effectiveness. Therefore, we provide a muffler for automobile exhaust systems. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a silencer for an automobile exhaust system, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a silencer device for an automobile exhaust system, comprising a front-section connecting pipe, the right end of the front-section connecting pipe is connected to a front-section silencer assembly, equidistantly distributed silencer bowls are installed inside the front-section silencer assembly, the left end of the front-section silencer assembly is installed with a first audio sensor, the right end of the front-section silencer assembly is installed with a first speaker, the right end of the front-section silencer assembly is connected with a middle-section silencer assembly, the interior of the middle-section silencer assembly is provided with a first baffle, a second baffle, a third baffle, and a fourth baffle from left to right, a first silencer pipe is connected between the first baffle and the second baffle, a second silencer pipe is sleeved inside the second baffle, a third silencer pipe and a fourth silencer pipe are connected between the third baffle and the fourth baffle, and two pairs of silencers are connected to the right end of the middle-section silencer assembly. The rear section connecting pipe is called a distribution, the end of the rear section connecting pipe is connected to the rear section silencer assembly, the interior of the rear section silencer assembly is provided with a fifth baffle, a sixth baffle and a seventh baffle from left to right in sequence, the fifth silencer pipe is connected between the fifth baffle and the sixth baffle, the interior of the seventh baffle is connected with the first ventilation pipe located on the right side of the fifth silencer pipe, the interior of the seventh baffle is connected with the fourth ventilation pipe located on the side of the first ventilation pipe, the interior of the sixth baffle is connected with the third ventilation pipe located on the left side of the fourth ventilation pipe, the interior of the fifth baffle is connected with the second ventilation pipe located on the left side of the third ventilation pipe, the right end of the inner cavity of the rear section silencer assembly is installed with a second audio sensor, the left end of the inner cavity of the rear section silencer assembly is installed with a second speaker, the right end of the rear section silencer assembly is connected with an exhaust port, and the left end of the exhaust port is connected with the exhaust pipe.

[0006] Optionally, the silencer bowl is a bottomless bowl-shaped structure, the silencer bowls are arranged from left to right, and a gap equal to the length of the silencer bowl is reserved between the silencer bowls.

[0007] Optionally, both left and right ends of the first silencer pipe are open structures, the left end of the first silencer pipe is connected to the left space of the first partition, and the right end of the first silencer pipe is connected to the right space of the second partition.

[0008] Optionally, the right end of the second silencer pipe is an open structure, the left end of the third silencer pipe is an open structure, and the second silencer pipe and the third silencer pipe are on the same axis.

[0009] Optionally, the right end of the fourth silencer tube is an open structure, and the right end of the fourth silencer tube is connected to the right side space of the fourth partition. The outside of the first silencer tube, the second silencer tube, the third silencer tube, and the fourth silencer tube are all provided with evenly distributed small holes.

[0010] Optionally, both left and right ends of the fifth silencer pipe are open structures, the left end of the fifth silencer pipe is connected to the right end of the rear connecting pipe, a small hole is provided on the outer surface of the fifth silencer pipe between the fifth partition plate and the sixth partition plate, and the right side of the fifth silencer pipe is connected to the space on the right side of the sixth partition plate.

[0011] Optionally, the second ventilation pipe, the third ventilation pipe, and the fourth ventilation pipe respectively connect the spaces on both sides of the fifth partition, the sixth partition, and the seventh partition, and the second ventilation pipe, the third ventilation pipe, and the fourth ventilation pipe are on the same axis.

[0012] Optionally, the exhaust pipe is mounted inside the fifth partition, the sixth partition, and the seventh partition, and the left end of the exhaust pipe extends to the left side of the fifth partition.

[0013] The present invention provides a muffler for an automobile exhaust system, which has the following beneficial effects:

[0014] 1. The silencer device for the automobile exhaust system is provided with a front-stage silencer component and utilizes a silencer bowl inside the front-stage silencer component to silence the airflow. Each time the airflow passes through the silencer bowl, it expands once, consuming a portion of energy, thereby achieving a silencer effect. At the same time, the first audio sensor inside the front-stage silencer component can detect the sound level and frequency of the exhaust noise. The front-stage silencer component then transmits the sound level and frequency information of the noise to the first speaker. The first speaker emits a sound with the same spectrum as the noise but opposite phase, thereby neutralizing the noise and actively reducing the impact of the noise.

[0015] 2. The silencer device for the automobile exhaust system is provided with a mid-section silencer assembly. When the airflow passes through the first silencer pipe, the second silencer pipe, the third silencer pipe, and the fourth silencer pipe, the airflow will diffuse through the small holes on the first silencer pipe, the second silencer pipe, the third silencer pipe, and the fourth silencer pipe, thereby dividing the airflow into small streams, increasing the frequency of the noise, reducing the audible sound component, and reducing interference to people. At the same time, when the airflow flows from the first silencer pipe to the second silencer pipe and from the third silencer pipe to the fourth silencer pipe, it can be absorbed by the silencer cotton, thereby further reducing the impact of the noise.

[0016] 3. The silencer device for the automobile exhaust system is provided with a rear-end silencer assembly. When the airflow passes through the fifth silencer pipe, the first vent pipe, the second vent pipe, the third vent pipe, and the fourth vent pipe inside the rear-end silencer assembly, multiple airflows are formed. Convection is formed between the airflows, so that the energy in the airflows offsets each other, reducing the impact of noise. At the same time, the second audio sensor inside the rear-end silencer assembly can detect the spectrum of the noise, and then transmit the spectrum information to the second speaker, so that the second speaker emits a sound with the same spectrum as the noise but opposite phase, actively reducing the impact of the noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic structural diagram of the front-end silencer assembly of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the muffler bowl of the present invention;

[0020] Figure 4 This is a schematic structural diagram of the middle section silencer assembly of the present invention;

[0021] Figure 5 This is a schematic structural diagram of the middle section silencer assembly of the present invention from another angle;

[0022] Figure 6 It is a schematic structural diagram of the rear section silencer assembly of the present invention.

[0023] In the figure: 1. front connecting pipe; 2. front silencer assembly; 3. silencer bowl; 4. first audio sensor; 5. first speaker; 6. middle silencer assembly; 7. first baffle; 8. second baffle; 9. third baffle; 10. fourth baffle; 11. first silencer pipe; 12. second silencer pipe; 13. third silencer pipe; 14. fourth silencer pipe; 15. rear connecting pipe; 16. rear silencer assembly; 17. fifth baffle; 18. sixth baffle; 19. seventh baffle; 20. fifth silencer pipe; 21. first ventilation pipe; 22. second ventilation pipe; 23. third ventilation pipe; 24. fourth ventilation pipe; 25. exhaust pipe; 26. second audio sensor; 27. second speaker; 28. exhaust port. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] See also Figures 1 to 3The present invention provides a technical solution: a silencer device for an automobile exhaust system, comprising a front-end connecting pipe 1, the right end of the front-end connecting pipe 1 is connected to a front-end silencer assembly 2, and equidistantly distributed silencer bowls 3 are installed inside the front-end silencer assembly 2. The silencer bowls 3 are bottomless bowl-shaped structures, and the silencer bowls 3 are arranged from left to right. A gap equal to the length of the silencer bowls 3 is reserved between the silencer bowls 3. By setting the silencer bowls 3, the silencer bowls 3 inside the front-end silencer assembly 2 are used to silence the airflow. Each time the airflow passes through the silencer bowls 3, it expands once, consuming a portion of energy, thereby To achieve the purpose of silencing, a first audio sensor 4 is installed at the left end of the front silencer component 2, and a first speaker 5 is installed at the right end of the front silencer component 2. Through the coordinated use of the first audio sensor 4 and the first speaker 5, the first audio sensor 4 can detect the sound level and frequency of the exhaust noise, and then the front silencer component 2 transmits the sound level and frequency information of the noise to the first speaker 5. The first speaker 5 will emit a sound with the same spectrum as the noise but opposite phase, thereby neutralizing the noise. The right end of the front silencer component 2 is connected to the middle silencer component 6.

[0026] See also Figures 4 and 5The interior of the middle silencer assembly 6 is provided with a first baffle 7, a second baffle 8, a third baffle 9, and a fourth baffle 10 from left to right. The first baffle 7 and the second baffle 8 and the third baffle 9 and the fourth baffle 10 are filled with silencer cotton. A first silencer pipe 11 is connected between the first baffle 7 and the second baffle 8. Both left and right ends of the first silencer pipe 11 are open structures. The left end of the first silencer pipe 11 is connected to the left space of the first baffle 7. When the airflow passes through the first silencer pipe 11, part of the airflow flows from the small holes outside the first silencer pipe 11 to the second silencer pipe 12 and is absorbed by the silencer cotton outside the first silencer pipe 11, which plays a role in silencing. A part of the airflow flows out directly to the right. The right side of the first silencer pipe 11 is connected to the right space of the second baffle 8. The second silencer pipe 12 is sleeved on the inside of the second baffle 8. The right end of the second silencer pipe 12 is an open structure. The left end of the third silencer pipe 13 is connected to the left side of the first silencer pipe 13. The end is an open structure. By setting a third silencer 13, the air flow inside the third silencer 13 diffuses outward from the small holes on the outside of the third silencer 13, and then is absorbed by the silencer cotton, which plays a role in eliminating noise. The second silencer 12 and the third silencer 13 are on the same axis. The third silencer 13 and the fourth silencer 14 are connected between the third partition plate 9 and the fourth partition plate 10. The right end of the fourth silencer 14 is an open structure. The right end of the fourth silencer 14 is connected to the right side space of the fourth partition plate 10. The first silencer 11, the second silencer 12, the third silencer 13, and the fourth silencer 14 are all provided with evenly distributed small holes on the outside. By opening the small holes, the air flow will diffuse through the small holes on the first silencer 11, the second silencer 12, the third silencer 13, and the fourth silencer 14, dividing the air flow into small streams, increasing the frequency of the noise, reducing the audible sound component, and reducing interference to people.

[0027] See also Figure 6, the right end of the middle silencer assembly 6 is connected to two symmetrically distributed rear section connecting pipes 15, the end of the rear section connecting pipe 15 is connected to the rear section silencer assembly 16, and the interior of the rear section silencer assembly 16 is provided with a fifth baffle 17, a sixth baffle 18, and a seventh baffle 19 from left to right. A fifth silencer pipe 20 is connected between the fifth baffle 17 and the sixth baffle 18. By providing the fifth silencer pipe 20, the airflow will diffuse outward from the small holes after passing through the fifth silencer pipe 20, which can play a role in silencing. At the same time, a part of the airflow flows out from the right end of the fifth silencer pipe 20 for diversion. The left and right ends of the fifth silencer pipe 20 are both open structures. The left end of the fifth silencer pipe 20 is connected to the right end of the rear section connecting pipe 15. A small hole is provided on the outer surface of the fifth silencer pipe 20 between the fifth baffle 17 and the sixth baffle 18. The right side of the fifth silencer pipe 20 is connected to the space on the right side of the sixth baffle 18, and the seventh baffle 19 is connected to the right side of the sixth baffle 18. The interior of the seventh partition 19 is connected with a first ventilation pipe 21 located on the right side of the fifth silencer 20. By setting the first ventilation pipe 21, a part of the air flow flows from the first ventilation pipe 21 to the right side of the seventh partition 19, which can divert the air flow. At the same time, convection occurs at both ends of the first ventilation pipe 21, which can offset the energy of the air flow. The interior of the seventh partition 19 is connected with a fourth ventilation pipe 24 located on the side of the first ventilation pipe 21, the interior of the sixth partition 18 is connected with a third ventilation pipe 23 located on the left side of the fourth ventilation pipe 24, and the interior of the fifth partition 17 is connected with a second ventilation pipe 22 located on the left side of the third ventilation pipe 23. Through the coordinated use of the second ventilation pipe 22, the third ventilation pipe 23 and the fourth ventilation pipe 24, when the air flow passes through the second ventilation pipe 22, the third ventilation pipe 23 and the fourth ventilation pipe 24, multiple air flows will be formed, and convection will be formed between the air flows, so that the energy in the air flows offset each other, thereby reducing the impact of noise.

[0028] See also Figure 6 The second ventilation pipe 22, the third ventilation pipe 23 and the fourth ventilation pipe 24 respectively connect the spaces on both sides of the fifth partition 17, the sixth partition 18 and the seventh partition 19. The second ventilation pipe 22, the third ventilation pipe 23 and the fourth ventilation pipe 24 are on the same axis. A second audio sensor 26 is installed at the right end of the inner cavity of the rear-section silencer component 16, and a second speaker 27 is installed at the left end of the inner cavity of the rear-section silencer component 16. Through the coordinated use of the second audio sensor 26 and the second speaker 27, the second audio sensor 26 can detect the spectrum of the noise, and then transmit the spectrum information to the second speaker 27, so that the second speaker 27 emits a sound with the same spectrum and opposite phase as the noise, actively reducing the impact of the noise. The right end of the rear-section silencer component 16 is connected to the exhaust port 28, and the left end of the exhaust port 28 is connected to the exhaust pipe 25. The exhaust pipe 25 is mounted inside the fifth partition 17, the sixth partition 18 and the seventh partition 19, and the left end of the exhaust pipe 25 extends to the left side of the fifth partition 17.

[0029] In summary, the automobile exhaust system uses a silencer. When in use, the airflow exhausted by the automobile enters the front silencer assembly 2 from the front connecting pipe 1, and the silencer bowl 3 inside the front silencer assembly 2 is used to silence the airflow. The airflow expands once each time it passes through the silencer bowl 3, consuming a portion of the energy, thereby playing a role in silencing. At the same time, the first audio sensor 4 inside the front silencer assembly 2 can detect the sound level and frequency of the exhaust noise, and then the front silencer assembly 2 transmits the sound level and frequency information of the noise to the first speaker 5. The first speaker 5 will emit a sound with the same spectrum as the noise but opposite phase, thereby neutralizing the noise. After that, the airflow enters the middle silencer assembly 6. When the airflow passes through the first silencer pipe 11, a portion of the airflow flows from the small hole outside the first silencer pipe 11 to the second silencer pipe 12, and is blocked by the silencer cotton outside the first silencer pipe 11. Absorbing noise, a part of it flows out directly to the right, and then the airflow enters the third silencer 13. The airflow flows from the small holes outside the third silencer 13 to the fourth silencer 14, and then the noise is absorbed by the silencer cotton outside the fourth silencer 14. Finally, it flows to the right from the fourth silencer 14 into the two rear-section connecting pipes 15, and then the airflow enters the rear-section silencer assembly 16. When the airflow passes through the fifth silencer 20, the first ventilation pipe 21, the fourth ventilation pipe 24, the third ventilation pipe 23, and the second ventilation pipe 22, a directional airflow is generated, so that the airflows convect with each other, reduce the energy of the airflow, and eliminate the noise of the airflow. The second audio sensor 26 inside the rear-section silencer assembly 16 can detect the frequency spectrum of the noise, and then transmit the frequency spectrum information to the second speaker 27, so that the second speaker 27 emits a sound with the same frequency spectrum as the noise but opposite phase, actively reducing the impact of noise.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Furthermore, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0031] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A muffler for an automobile exhaust system, comprising a front connecting pipe (1), characterized in that: The right end of the front section connecting pipe (1) is connected to the front section muffler assembly (2), and muffler bowls (3) distributed at equal intervals are installed inside the front section muffler assembly (2). The left end of the front section muffler assembly (2) is installed with a first audio sensor (4), and the right end of the front section muffler assembly (2) is installed with a first loudspeaker (5). The right end of the front section muffler assembly (2) is connected to the middle section muffler assembly (6), and the middle section muffler assembly (6) is provided with a first baffle (7), a second baffle (8), a third baffle (9), and a fourth loudspeaker (10) in sequence from left to right. A partition (9), a fourth partition (10), a first silencer pipe (11) is connected between the first partition (7) and the second partition (8), a second silencer pipe (12) is sleeved inside the second partition (8), a third silencer pipe (13) and a fourth silencer pipe (14) are connected between the third partition (9) and the fourth partition (10), the right end of the middle silencer assembly (6) is connected to two symmetrically distributed rear section connecting pipes (15), the end of the rear section connecting pipe (15) is connected to the rear section silencer assembly (16), The interior of the rear silencer assembly (16) is provided with a fifth baffle (17), a sixth baffle (18), and a seventh baffle (19) from left to right, a fifth silencer pipe (20) is connected between the fifth baffle (17) and the sixth baffle (18), the interior of the seventh baffle (19) is sleeved with a first ventilation pipe (21) located on the right side of the fifth silencer pipe (20), the interior of the seventh baffle (19) is sleeved with a fourth ventilation pipe (24) located on the side of the first ventilation pipe (21), the interior of the sixth baffle (18) is sleeved with a fourth ventilation pipe (24) located on the side of the first ventilation pipe (21), and the interior of the sixth baffle (18) is sleeved with a fifth ventilation pipe (20) located on the right side of the fifth silencer pipe (20). A third ventilation pipe (23) is sleeved on the left side of the fourth ventilation pipe (24); a second ventilation pipe (22) is sleeved on the inside of the fifth partition (17) and is located on the left side of the third ventilation pipe (23); a second audio sensor (26) is installed at the right end of the inner cavity of the rear section silencer component (16); a second speaker (27) is installed at the left end of the inner cavity of the rear section silencer component (16); the right end of the rear section silencer component (16) is connected to an exhaust port (28); and the left end of the exhaust port (28) is connected to an exhaust pipe (25).

2. A muffler device for an automobile exhaust system according to claim 1, characterized in that: The silencer bowls (3) are bottomless bowl-shaped structures. The silencer bowls (3) are arranged from left to right, and gaps equal to the length of the silencer bowls (3) are reserved between the silencer bowls (3).

3. The muffler device for an automobile exhaust system according to claim 1, characterized in that: Both left and right ends of the first silencer pipe (11) are open structures; the left end of the first silencer pipe (11) is connected to the left space of the first partition plate (7); and the right end of the first silencer pipe (11) is connected to the right space of the second partition plate (8).

4. The muffler device for an automobile exhaust system according to claim 1, characterized in that: The right end of the second silencer pipe (12) is an open structure, the left end of the third silencer pipe (13) is an open structure, and the second silencer pipe (12) and the third silencer pipe (13) are on the same axis.

5. The muffler device for an automobile exhaust system according to claim 1, characterized in that: The right end of the fourth silencer (14) is an open structure, and the right end of the fourth silencer (14) is connected to the right side space of the fourth partition (10). The first silencer (11), the second silencer (12), the third silencer (13), and the fourth silencer (14) are all provided with evenly distributed small holes on their exteriors.

6. The muffler device for an automobile exhaust system according to claim 1, characterized in that: Both left and right ends of the fifth silencer pipe (20) are open structures. The left end of the fifth silencer pipe (20) is connected to the right end of the rear connecting pipe (15). A small hole is opened on the outer surface of the fifth silencer pipe (20) between the fifth partition plate (17) and the sixth partition plate (18). The right side of the fifth silencer pipe (20) is connected to the space on the right side of the sixth partition plate (18).

7. The muffler device for an automobile exhaust system according to claim 1, characterized in that: The second ventilation pipe (22), the third ventilation pipe (23), and the fourth ventilation pipe (24) respectively connect the spaces on both sides of the fifth partition (17), the sixth partition (18), and the seventh partition (19), and the second ventilation pipe (22), the third ventilation pipe (23), and the fourth ventilation pipe (24) are on the same axis.

8. The muffler device for an automobile exhaust system according to claim 1, characterized in that: The exhaust pipe (25) is sleeved inside the fifth partition (17), the sixth partition (18), and the seventh partition (19), and the left end of the exhaust pipe (25) extends to the left side of the fifth partition (17).

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