A range-extending hybrid vehicle muffler

Abstract

The application relates to the technical field of automobile silencers, in particular to a range-extender hybrid automobile silencer, which comprises a silencer body, the inside of the silencer body is sequentially provided with a first sound insulation plate, a second sound insulation plate, a third sound insulation plate and a fourth sound insulation plate from left to right and sealed with the inner wall of the silencer body, the first sound insulation plate and the inner wall of one side of the silencer body form a first silencing chamber, and the first sound insulation plate and the second sound insulation plate form a second silencing chamber. The first sound insulation plate, the second sound insulation plate, the third sound insulation plate and the fourth sound insulation plate are arranged, the first silencing chamber, the second silencing chamber, the third silencing chamber, the fourth silencing chamber and the fifth silencing chamber are formed in the inside of the silencer body, noise enters the first silencing chamber through one end of the U-shaped air inlet pipe, the kinetic energy of the noise is reduced through mutual collision, the kinetic energy of the noise is reduced again through mutual collision after entering the fifth silencing chamber through the U-shaped connecting pipe and the L-shaped connecting pipe, and the noise is finally discharged through the U-shaped air outlet pipe.

Description

TECHNICAL FIELD

[0001] The application relates to a silencer, in particular to a range-extender hybrid vehicle silencer, and belongs to the technical field of automobile silencers. BACKGROUND

[0002] The automobile silencer is a device installed at the tail of the automobile and used for reducing the noise and vibration emitted by the automobile engine. It is composed of an air inlet pipe, a middle section pipe and a tail pipe, and through a series of reflection, sound absorption and silencing technologies, the noise emitted by the engine is reduced to a certain extent, so that the automobile is more quiet and comfortable when driving.

[0003] However, due to the complexity of the power system of the range-extender hybrid vehicle, including the fuel engine, the electric motor and the battery and other parts, the noise control is difficult, especially when driving at high speed or accelerating, the noise is easy to increase, the range-extender hybrid vehicle needs to use the fuel engine and the electric motor at the same time, so the fuel consumption is high, which also leads to the increase of the noise, and the range-extender hybrid vehicle needs to be charged and discharged frequently, which also leads to the increase of the noise, so that the silencer used for ordinary fuel vehicles is not ideal when used on the range-extender hybrid vehicle.

[0004] Therefore, it is urgent to improve the range-extender hybrid vehicle silencer to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a range-extender hybrid vehicle silencer, which is provided with a first sound insulation plate, a second sound insulation plate, a third sound insulation plate and a fourth sound insulation plate, and first, second, third, fourth and fifth silencing compartments are formed inside the silencer body. The noise enters the first silencing compartment through one end of the U-shaped air inlet pipe, collides with each other to reduce the kinetic energy of the noise, then enters the fifth silencing compartment through the U-shaped connecting pipe and the L-shaped connecting pipe, collides with each other again to reduce the kinetic energy of the noise, and finally is discharged through the U-shaped air outlet pipe.

[0006] In order to achieve the above purpose, the main technical scheme adopted by the present application includes:

[0007] A range-extender hybrid vehicle silencer, comprising a silencer body, wherein a first sound insulation plate, a second sound insulation plate, a third sound insulation plate and a fourth sound insulation plate are sequentially arranged inside the silencer body from left to right and are sealed with the inner walls of the silencer body, the first sound insulation plate and one side inner wall of the silencer body form a first silencing compartment, the first sound insulation plate and the second sound insulation plate form a second silencing compartment, the second sound insulation plate and the third sound insulation plate form a third silencing compartment, the third sound insulation plate and the fourth sound insulation plate form a fourth silencing compartment, and the fourth sound insulation plate and the other inner wall of the silencer body form a fifth silencing compartment.

[0008] The U-shaped air inlet pipe is provided with a U-shaped air outlet pipe on the other side of the muffler body, the U-shaped air inlet pipe is provided with a U-shaped connecting pipe in the muffler body, and the U-shaped connecting pipe is provided with an L-shaped connecting pipe.

[0009] The U-shaped air inlet pipe is provided with a U-shaped air outlet pipe on the other side of the muffler body, the U-shaped air inlet pipe is provided with a U-shaped connecting pipe in the muffler body, and the U-shaped connecting pipe is provided with an L-shaped connecting pipe.

[0010] Preferably, the first sound insulation plate, the second sound insulation plate, the third sound insulation plate and the fourth sound insulation plate are provided with a first sound insulation plate inside, and a plurality of sound absorption holes are formed on the two sides of the first sound insulation plate, the second sound insulation plate, the third sound insulation plate and the fourth sound insulation plate.

[0011] Preferably, the two inner walls of the muffler body are provided with a second sound insulation plate.

[0012] Preferably, the U-shaped air inlet pipe is provided with a plurality of first sound holes on the part located in the first sound insulation chamber, and a plurality of second sound holes are formed on the curved part of the U-shaped air inlet pipe located in the second sound insulation chamber.

[0013] Preferably, the U-shaped connecting pipe is provided with a plurality of third sound holes on the part located in the second sound insulation chamber, a plurality of fourth sound holes are formed on the part of the U-shaped connecting pipe located in the third sound insulation chamber, a plurality of fifth sound holes are formed on the part of the U-shaped connecting pipe located in the fourth sound insulation chamber, and a sixth sound hole is formed on the curved end of the U-shaped connecting pipe located in the fourth sound insulation chamber.

[0014] Preferably, the L-shaped connecting pipe is provided with a plurality of seventh sound holes on the part located in the third sound insulation chamber, and a plurality of eighth sound holes are formed on the part of the L-shaped connecting pipe located in the fourth sound insulation chamber.

[0015] Preferably, a plurality of ninth sound outlets are formed on the portion of the U-shaped air outlet pipe located in the fourth sound insulation chamber.

[0016] Preferably, the plurality of first sound outlets are linearly arranged at equal distances around the horizontal central axis of the U-shaped air inlet pipe, and the plurality of tenth sound outlets are linearly arranged at equal distances around the central axis of the U-shaped air outlet pipe.

[0017] Preferably, the plurality of third sound outlets, fourth sound outlets, fifth sound outlets and sixth sound outlets are linearly arranged at equal distances around the horizontal central axis of the U-shaped connecting pipe.

[0018] Preferably, the plurality of seventh sound outlets are linearly arranged at equal distances around the vertical central axis of the L-shaped connecting pipe, and the plurality of eighth sound outlets are linearly arranged at equal distances around the horizontal central axis of the L-shaped connecting pipe.

[0019] The present application has at least the following advantages:

[0020] 1. By arranging the first sound insulation plate, the second sound insulation plate, the third sound insulation plate and the fourth sound insulation plate, the first sound insulation chamber, the second sound insulation chamber, the third sound insulation chamber, the fourth sound insulation chamber and the fifth sound insulation chamber are formed inside the sound absorber body. The noise enters the first sound insulation chamber through one end of the U-shaped air inlet pipe, collides with each other to reduce the kinetic energy of the noise, enters the fifth sound insulation chamber through the U-shaped connecting pipe and the L-shaped connecting pipe again, collides with each other again to reduce the kinetic energy of the noise, and is finally discharged through the U-shaped air outlet pipe.

[0021] 2. The first sound insulation plate, the second sound insulation plate, the third sound insulation plate and the fourth sound insulation plate are internally provided with the first sound absorption plate. A plurality of sound absorption holes are formed on both sides of the first sound insulation plate, the second sound insulation plate, the third sound insulation plate and the fourth sound insulation plate. The first sound absorption plate is made of graphite fiber material, which has good sound absorption performance and can effectively reduce noise. The noise inside the sound absorber body is absorbed by the first sound absorption plate through the sound absorption holes, which can efficiently reduce the noise inside the sound absorber body. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 is a partial structure diagram of the present application;

[0024] Figure 2 is a perspective view of the present application;

[0025] Figure 3 This is a three-dimensional cross-sectional view of the present invention.

[0026] In the diagram, 1. Silencer body; 11. First sound insulation panel; 12. Second sound insulation panel; 13. Third sound insulation panel; 14. Fourth sound insulation panel; 15. First silencing chamber; 16. Second silencing chamber; 17. Third silencing chamber; 18. Fourth silencing chamber; 19. Fifth silencing chamber; 120. U-shaped air inlet pipe; 121. U-shaped air outlet pipe; 122. U-shaped connecting pipe; 123. L-shaped connecting pipe; 2. First silencing panel; 21. Sound absorption hole; 3. Second silencing panel; 4. First sound outlet; 41. Second sound outlet; 5. Third sound outlet; 51. Fourth sound outlet; 52. Fifth sound outlet; 53. Sixth sound outlet; 6. Seventh sound outlet; 61. Eighth sound outlet; 7. Ninth sound outlet; 71. Tenth sound outlet. Detailed Implementation

[0027] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0028] like Figures 1-3 As shown, the range-extended hybrid vehicle muffler provided in this embodiment includes a muffler body 1. Second sound-absorbing plates 3 are provided on both inner walls of the muffler body 1. The second sound-absorbing plates 3 are made of aluminum silicate fiber. Aluminum silicate fiber has good high-temperature resistance, heat insulation performance, and chemical stability, and can maintain good performance and stability in high-temperature environments. Simultaneously, aluminum silicate fiber has good sound absorption performance, which can effectively reduce noise and vibration. Inside the muffler body 1, from left to right, are arranged a first sound-insulating plate 11, a second sound-insulating plate 12, a third sound-insulating plate 13, and a fourth sound-insulating plate 14, which are sealed to the inner wall of the muffler body 1. The first sound-absorbing plate 2 is provided inside the first sound-absorbing plate 11, the second sound-absorbing plate 12, the third sound-absorbing plate 13, and the fourth sound-absorbing plate 14. Several sound-absorbing holes 21 are opened on both sides of the first sound-absorbing plate 11, the second sound-absorbing plate 12, the third sound-absorbing plate 13, and the fourth sound-absorbing plate 14. By setting the first sound-absorbing plate 2 and several sound-absorbing holes 21, the first sound-absorbing plate 2 is made of graphite fiber material. Graphite fiber material has good sound absorption performance and can effectively reduce noise. The noise inside the muffler body 1 is absorbed by the first sound-absorbing plate 2 through the sound-absorbing holes 21, which can efficiently reduce the noise inside the muffler body 1.

[0029] like Figure 3As shown, the first sound insulation plate 11 and the one side inner wall of the muffler body 1 form the first sound insulation chamber 15, the first sound insulation plate 11 and the second sound insulation plate 12 form the second sound insulation chamber 16, the second sound insulation plate 12 and the third sound insulation plate 13 form the third sound insulation chamber 17, the third sound insulation plate 13 and the fourth sound insulation plate 14 form the fourth sound insulation chamber 18, and the fourth sound insulation plate 14 and the other inner wall of the muffler body 1 form the fifth sound insulation chamber 19. The noise kinetic energy generated by the automobile can be reduced layer by layer through the first sound insulation chamber 15, the second sound insulation chamber 16, the third sound insulation chamber 17, the fourth sound insulation chamber 18, and the fifth sound insulation chamber 19, thereby playing a role in noise reduction.

[0030] As shown in the drawings, Figure 3 As shown, the one side of the muffler body 1 is provided with a U-shaped air inlet pipe 120 which is connected to the inside of the muffler body 1, the other side of the muffler body 1 is provided with a U-shaped air outlet pipe 121 which is connected to the inside of the muffler body 1, the inside of the muffler body 1 is provided with a U-shaped connecting pipe 122, and the inside of the muffler body 1 is provided with an L-shaped connecting pipe 123 which is connected to the U-shaped connecting pipe 122.

[0031] As shown in the drawings, Figure 3 As shown, one end of the U-shaped air inlet pipe 120 penetrates through the first sound insulation plate 11 and extends into the second sound insulation chamber 16, the curved end of the U-shaped air inlet pipe 120 penetrates through the first sound insulation plate 11 again and is connected to the first sound insulation chamber 15, one end of the U-shaped connecting pipe 122 penetrates through the first sound insulation plate 11, the second sound insulation plate 12, the third sound insulation plate 13, and the fourth sound insulation plate 14 and extends into the fifth sound insulation chamber 19, the curved end of the U-shaped connecting pipe 122 penetrates through the fourth sound insulation plate 14 and the third sound insulation plate 13 again and is connected to the third sound insulation chamber 17, one end of the L-shaped connecting pipe 123 which is connected to the U-shaped connecting pipe 122 is located in the third sound insulation chamber 17, the other end of the L-shaped connecting pipe 123 penetrates through the third sound insulation plate 13 and the fourth sound insulation plate 14 and is connected to the fifth sound insulation chamber 19, one end of the U-shaped air outlet pipe 121 penetrates through the fourth sound insulation plate 14, and the curved end of the U-shaped air outlet pipe 121 penetrates through the fourth sound insulation plate 14 and is connected to the fifth sound insulation chamber 19. The noise generated by the automobile enters the inside of the muffler body 1 through one end of the U-shaped air inlet pipe 120, enters the first sound insulation chamber 15 again through the other end of the U-shaped air inlet pipe 120 for noise reduction, the noise is absorbed by the second sound insulation plate 3 in the first sound insulation chamber 15, the reduced noise enters the fifth sound insulation chamber 19 again through the U-shaped connecting pipe 122 and the L-shaped connecting pipe 123 and is absorbed by the second sound insulation plate 3 again, and the noise is reduced again through the U-shaped air outlet pipe 121 which is connected to the fifth sound insulation chamber 19 and is discharged again.

[0032] As shown in the drawings, Figure 1As shown, the part of the U-shaped air inlet pipe 120 located in the first sound attenuation chamber 15 is provided with a plurality of first sound outlets 4, and the part of the U-shaped air inlet pipe 120 located in the curved portion of the second sound attenuation chamber 16 is provided with a plurality of second sound outlets 41. When the noise enters the muffler body 1 through the U-shaped air inlet pipe 120, a part of the noise is dissipated through the first sound outlets 4 and is absorbed by the second sound attenuation plate 3 and the first sound attenuation plate 2 arranged in the first sound insulation plate 11, and another part of the noise enters the second sound attenuation chamber 16 through the second sound outlets 41 and is absorbed by the first sound attenuation plate 2 arranged in the first sound insulation plate 11 and the second sound insulation plate 12.

[0033] Further, as shown in Figure 1 As shown, the part of the U-shaped connecting pipe 122 located in the second sound attenuation chamber 16 is provided with a plurality of third sound outlets 5, the part of the U-shaped connecting pipe 122 located in the third sound attenuation chamber 17 is provided with a plurality of fourth sound outlets 51, the part of the U-shaped connecting pipe 122 located in the fourth sound attenuation chamber 18 is provided with a plurality of fifth sound outlets 52, and the curved end of the U-shaped connecting pipe 122 located in the fourth sound attenuation chamber 18 is provided with a sixth sound outlet 53. The noise finally accumulated in the first sound attenuation chamber 15 through the U-shaped air inlet pipe 120 enters through one end of the U-shaped connecting pipe 122, a part of the noise enters the second sound attenuation chamber 16 through the third sound outlets 5 and is absorbed by the first sound attenuation plate 2, a part of the noise enters the third sound attenuation chamber 17 through the fourth sound outlets 51 and is absorbed by the first sound attenuation plate 2, and another part of the noise enters the fourth sound attenuation chamber 18 through the fifth sound outlets 52 and the sixth sound outlets 53 and is absorbed by the first sound attenuation plate 2. In addition, the noise that has passed through the second sound outlets 41 and the noise that has passed through the third sound outlets 5 collide with each other in the second sound attenuation chamber 16, thereby reducing the kinetic energy of the noise and facilitating the absorption of the noise by the first sound attenuation plate 2.

[0034] Further, as shown in Figure 1 As shown, the part of the L-shaped connecting pipe 123 located in the third sound attenuation chamber 17 is provided with a plurality of seventh sound outlets 6, and the part of the L-shaped connecting pipe 123 located in the fourth sound attenuation chamber 18 is provided with a plurality of eighth sound outlets 61. The remaining noise enters the L-shaped connecting pipe 123 connected to the U-shaped connecting pipe 122, enters the third sound attenuation chamber 17 through the seventh sound outlets 6, and enters the fourth sound attenuation chamber 18 through the eighth sound outlets 61, and is also absorbed by the first sound attenuation plate 2. The noise that has passed through the fifth sound outlets 52 and the noise that have passed through the eighth sound outlets 61 collide with each other in the third sound attenuation chamber 17, thereby reducing the kinetic energy of the noise.

[0035] Further, as shown in Figure 1As shown, the U-shaped air outlet pipe 121 is provided with a plurality of ninth sound outlets 7 on the portion of the fourth sound absorption chamber 18, and the U-shaped air outlet pipe 121 is provided with a plurality of tenth sound outlets 71 on the portion of the fifth sound absorption chamber 19. The noise from the L-shaped connecting pipe 123 enters the fifth sound absorption chamber 19 and is absorbed by the first sound absorption plate 2 again. The remaining noise is partly absorbed by the fourth sound absorption chamber 18 through the ninth sound outlets 7 on the U-shaped air outlet pipe 121, and the other part of the noise is absorbed again by the fifth sound absorption chamber 19. Finally, the noise is exhausted through the U-shaped air outlet pipe 121 after multiple absorptions. The noise exhausted through the fifth sound outlets 52, the sixth sound outlets 53, the eighth sound outlets 61 and the ninth sound outlets 7 collides in the fourth sound absorption chamber 18, so that the kinetic energy of the noise is greatly reduced.

[0036] The plurality of first sound outlets 4 are linearly arranged at equal distances around the horizontal center axis of the U-shaped air inlet pipe 120, the plurality of tenth sound outlets 71 are linearly arranged at equal distances around the center axis of the U-shaped air outlet pipe 121, the plurality of third sound outlets 5, the fourth sound outlets 51, the fifth sound outlets 52 and the sixth sound outlets 53 are linearly arranged at equal distances around the horizontal center axis of the U-shaped connecting pipe 122, the plurality of seventh sound outlets 6 are linearly arranged at equal distances around the vertical center axis of the L-shaped connecting pipe 123, and the plurality of eighth sound outlets 61 are linearly arranged at equal distances around the horizontal center axis of the L-shaped connecting pipe 123.

[0037] As shown in FIG. 1, the sound absorption device 1 comprises a first sound absorption plate 2, a second sound absorption plate 3, a U-shaped air inlet pipe 120, a U-shaped air outlet pipe 121, a U-shaped connecting pipe 122, an L-shaped connecting pipe 123, a fourth sound absorption chamber 18 and a fifth sound absorption chamber 19. Figures 1-3As shown, the principle of the range extender hybrid vehicle muffler provided by the embodiment is as follows: the noise generated by the vehicle enters the inside of the muffler body 1 through one end of the U-shaped air inlet pipe 120, part of the noise enters the first muffling chamber 15 through the first sound outlet hole 4, part of the noise enters the second muffling chamber 16 through the second sound outlet hole 41, and the rest of the noise enters the first muffling chamber 15 again, enters the U-shaped connecting pipe 122, and is absorbed into the second muffling chamber 16, the third muffling chamber 17 and the fourth muffling chamber 18 through the third sound outlet hole 5, the fourth sound outlet hole 51, the fifth sound outlet hole 52 and the sixth sound outlet hole 53 respectively, the noise enters the third muffling chamber 17 and the fourth muffling chamber 18 through the seventh sound outlet hole 6 and the eighth sound outlet hole 61 of the L-shaped connecting pipe 123 respectively, and is absorbed, the noise finally enters the fifth muffling chamber 19, enters the fourth muffling chamber 18 and the fifth muffling chamber 19 again through the eighth sound outlet hole 61 and the ninth sound outlet hole 7 of the U-shaped air outlet pipe 121, and is absorbed, and is finally discharged through the end of the U-shaped air outlet pipe 121, the noise that comes out through the second sound outlet hole 41 and the noise that comes out through the third sound outlet hole 5 collide in the second muffling chamber 16, reducing the kinetic energy of the noise, the noise that comes out through the fifth sound outlet hole 52 and the noise that comes out through the eighth sound outlet hole 61 collide in the third muffling chamber 17, so that the kinetic energy of the noise is reduced again, and the noise that comes out through the fifth sound outlet hole 52, the sixth sound outlet hole 53, the eighth sound outlet hole 61 and the ninth sound outlet hole 7 collide in the fourth muffling chamber 18, so that the kinetic energy of the noise is greatly reduced.

[0038] As used in the specification and claims, certain terminology is used to refer to specific components. Those of ordinary skill in the art will appreciate that hardware manufacturers can refer to the same component using different names. The specification and claims do not serve as a means to distinguish components based on the names used to refer to the components, but rather serve as a means to distinguish components based on the functional differences between the components. As used throughout the specification and claims, "comprising" is a broad term intended to be synonymous with "including" or "comprising." "Consisting essentially of" means that the composition or method includes the recited elements, but not excluding elements that do not materially affect the basic and novel characteristic(s) of the composition or method. "Consisting of" means the composition or method includes the recited elements and excludes all other elements.

[0039] It should be noted that the terms "comprising," "including," and "having" or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, product, or method that comprises a list of elements is not necessarily limited to only those elements but can include other elements not expressly listed or inherent to such process, product, or method. An element proceeded by "comprises... a" does not, without more constraints, preclude the existence of additional identical elements in the process, product, or method.

[0040] The foregoing description illustrates and describes several preferred embodiments of the present application. However, it is to be understood that the application is not limited to the precise arrangements and instrumentalities described herein, and that other embodiments and modifications can be employed without departing from the spirit and scope of the application. It is intended that all such alterations and modifications be considered as within the scope of the application as defined by the appended claims.

Claims

1. A range-extender hybrid vehicle muffler, comprising a muffler body (1), characterized in that: The muffler body (1) is internally provided with a first sound insulation plate (11), a second sound insulation plate (12), a third sound insulation plate (13) and a fourth sound insulation plate (14) from left to right, the first sound insulation plate (11) and the inner wall of the muffler body (1) form a first sound insulation chamber (15), the first sound insulation plate (11) and the second sound insulation plate (12) form a second sound insulation chamber (16), the second sound insulation plate (12) and the third sound insulation plate (13) form a third sound insulation chamber (17), the third sound insulation plate (13) and the fourth sound insulation plate (14) form a fourth sound insulation chamber (18), and the fourth sound insulation plate (14) and the other inner wall of the muffler body (1) form a fifth sound insulation chamber (19). The muffler body (1) is provided with a U-shaped air inlet pipe (120) connected to the inside of the muffler body (1) on one side, a U-shaped air outlet pipe (121) connected to the inside of the muffler body (1) on the other side, a U-shaped connecting pipe (122) provided inside the muffler body (1), and an L-shaped connecting pipe (123) provided inside the muffler body (1) and connected to the U-shaped connecting pipe (122). One end of the U-shaped air inlet pipe (120) penetrates the first sound insulation plate (11) and extends into the second sound insulation chamber (16), the curved end of the U-shaped air inlet pipe (120) penetrates the first sound insulation plate (11) again and is connected to the first sound insulation chamber (15), one end of the U-shaped connecting pipe (122) penetrates the first sound insulation plate (11), the second sound insulation plate (12), the third sound insulation plate (13) and the fourth sound insulation plate (14) and extends into the fifth sound insulation chamber (19), the curved end of the U-shaped connecting pipe (122) penetrates the fourth sound insulation plate (14) and the third sound insulation plate (13) again and is connected to the third sound insulation chamber (17), one end of the L-shaped connecting pipe (123) connected to the U-shaped connecting pipe (122) is located in the third sound insulation chamber (17), the other end of the L-shaped connecting pipe (123) penetrates the third sound insulation plate (13) and the fourth sound insulation plate (14) and is connected to the fifth sound insulation chamber (19), one end of the U-shaped air outlet pipe (121) penetrates the fourth sound insulation plate (14), and the curved end of the U-shaped air outlet pipe (121) penetrates the fourth sound insulation plate (14) and is connected to the fifth sound insulation chamber (19).

2. The sound muffler of the range-extender hybrid vehicle according to claim 1, characterized in that: The first sound insulation plate (11), the second sound insulation plate (12), the third sound insulation plate (13) and the fourth sound insulation plate (14) are internally provided with a first sound insulation plate (2), and a plurality of sound absorbing holes (21) are formed on both sides of the first sound insulation plate (11), the second sound insulation plate (12), the third sound insulation plate (13) and the fourth sound insulation plate (14).

3. The sound muffler of the range-extender hybrid vehicle according to claim 1, characterized in that: Second sound insulation plates (3) are arranged on the inner walls of both sides of the muffler body (1).

4. The sound muffler of the range-extender hybrid vehicle according to claim 1, characterized in that: The U-shaped air inlet pipe (120) is provided with a plurality of first sound holes (4) on the part in the first sound attenuation chamber (15), and the U-shaped air inlet pipe (120) is provided with a plurality of second sound holes (41) on the curved part of the second sound attenuation chamber (16).

5. The range-extender hybrid vehicle muffler of claim 1, wherein: The U-shaped connecting pipe (122) is provided with a plurality of third sound holes (5) on the part of the second sound attenuation chamber (16), a plurality of fourth sound holes (51) on the part of the third sound attenuation chamber (17), a plurality of fifth sound holes (52) on the part of the fourth sound attenuation chamber (18), and a sixth sound hole (53) on the curved end of the U-shaped connecting pipe (122) located in the fourth sound attenuation chamber (18).

6. The range-extender hybrid vehicle muffler of claim 1, wherein: The L-shaped connecting pipe (123) is provided with a plurality of seventh sound holes (6) on the part of the third sound attenuation chamber (17), and a plurality of eighth sound holes (61) on the part of the fourth sound attenuation chamber (18).

7. The sound damper of a range extended hybrid vehicle according to claim 4, characterized in that: The U-shaped air outlet pipe (121) is provided with a plurality of ninth sound holes (7) on the part of the fourth sound attenuation chamber (18), and a plurality of tenth sound holes (71) on the part of the fifth sound attenuation chamber (19).

8. The sound damper of a range extended hybrid vehicle according to claim 7, characterized in that: A plurality of first sound holes (4) are arranged linearly at equal intervals around the horizontal center axis of the U-shaped air inlet pipe (120), and a plurality of tenth sound holes (71) are arranged linearly at equal intervals around the center axis of the U-shaped air outlet pipe (121).

9. The sound damper of a range extended hybrid vehicle according to claim 5, characterized in that: A plurality of third sound holes (5), fourth sound holes (51), fifth sound holes (52) and sixth sound holes (53) are arranged linearly at equal intervals around the horizontal center axis of the U-shaped connecting pipe (122).

10. The range-extender hybrid vehicle muffler of claim 6, wherein: A plurality of seventh sound holes (6) are arranged linearly at equal intervals around the vertical center axis of the L-shaped connecting pipe (123), and a plurality of eighth sound holes (61) are arranged linearly at equal intervals around the horizontal center axis of the L-shaped connecting pipe (123).

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