Air inlet pipe, engine air inlet system and vehicle

Abstract

The utility model relates to an air inlet pipe, an engine air inlet system and a vehicle. The air inlet pipe comprises a first pipe shell and a second pipe shell. The first pipe shell and the second pipe shell jointly define a cavity, and an inlet and an outlet are formed in the cavity wall of the cavity; a third pipe shell is further arranged in the cavity, a first silencing cavity is defined by the third pipe shell and one of the first pipe shell and the second pipe shell, a first silencing hole structure communicated with the first silencing cavity is arranged on the third pipe shell, and an air inlet channel is defined by the third pipe shell and the other one of the first pipe shell and the second pipe shell. The air inlet channel communicates with the outlet, the inlet and the first silencing hole structure to form a silencing path for noise sound wave circulation so as to eliminate noise entering the air inlet pipe, and the third pipe shell is arranged in the cavity to define the first silencing cavity together with one of the first pipe shell and the second pipe shell, so that noise in the air inlet pipe can be eliminated. The noise elimination cavity formed by separation of an additional partition plate can be avoided, so that the internal structure can be simplified.

Description

Technical Field

[0001] The present disclosure relates to the technical field of engines, and in particular to an intake pipe, an engine intake system and a vehicle. Background Art

[0002] The intake pipe is an important component of the engine's air intake system. It provides clean air to the engine. At the same time, the noise emitted by the engine can be transmitted through the intake pipe.

[0003] When several independent muffler units are connected to the outside of the intake pipe to muffle the noise emitted by the engine, it is easy for the muffler unit to occupy the internal space of the engine compartment. To solve this problem, a method of integrating a muffler unit in the intake pipe for muffler is currently proposed. Specifically, the intake pipe may include two shells, and the two shells enclose a cavity for air intake and air outlet. Then a partition is set in the cavity to separate the cavity into multiple sub-chambers, and then a pipe with an integrated muffler assembly is set in each sub-chamber to enclose the sub-chambers to form a muffler cavity together, which will make the internal structure of the entire intake pipe complicated. Utility Model Content

[0004] In order to solve the above technical problems, the present disclosure provides an intake pipe, an engine intake system and a vehicle.

[0005] In a first aspect, the present disclosure provides an air intake pipe, comprising a first pipe shell and a second pipe shell;

[0006] The first tube shell and the second tube shell together enclose a cavity, and the cavity wall of the cavity is provided with at least an inlet and an outlet;

[0007] A third tube shell is also provided in the cavity, and the third tube shell and one of the first tube shell and the second tube shell are together enclosed to form a first muffler cavity, and a first muffler hole structure connected to the first muffler cavity is provided on the third tube shell, and the third tube shell and the other of the first tube shell and the second tube shell are enclosed to form an air intake channel, and the air intake channel is respectively connected to the inlet, the outlet and the first muffler hole structure.

[0008] In some embodiments, there are at least two first silencer cavities, and at least two first silencer cavities are sequentially separated and arranged along the length direction of the air inlet pipe; there are at least two first silencer hole structures, and each of the first silencer hole structures is connected one-to-one with at least one of the first silencer cavities.

[0009] In some embodiments, a fourth tube shell is further disposed in the cavity, the fourth tube shell is located between the first tube shell and the third tube shell, and a first wavelength tube connected to the air inlet channel is disposed on the fourth tube shell.

[0010] In some embodiments, there are at least two first wavelength tubes, and the at least two first wavelength tubes are arranged in sequence along the length direction of the air inlet pipe.

[0011] In some embodiments, the height of the first wavelength tube gradually increases from the inlet to the outlet.

[0012] In some embodiments, a second wavelength tube connected to the air inlet passage is formed between the side surface of the fourth tube shell and the side wall of the first tube shell, wherein the first wavelength tube and the second wavelength tube are arranged in sequence from the inlet to the outlet.

[0013] In some embodiments, the fourth tube shell and the first tube shell enclose two second muffler chambers, and the two second muffler chambers are sequentially separated and arranged along the length direction of the air inlet pipe.

[0014] In some embodiments, the fourth tube shell is provided with a second silencer hole structure and a silencer pipe, both of which are connected to the air intake channel, the silencer pipe is located downstream of the second silencer hole structure, the first wavelength tube is located between the second wavelength tube and the silencer pipe, the second silencer hole structure is connected to one of the two second silencer cavities, and the silencer pipe is located in the other of the two second silencer cavities and is connected to the other of the two second silencer cavities.

[0015] In a second aspect, the present disclosure provides an engine intake system, comprising an intake pipe.

[0016] In a third aspect, the present disclosure provides a vehicle including an air intake pipe or an engine air intake system.

[0017] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0018] The present invention provides an intake pipe, an engine intake system and a vehicle, wherein the intake pipe comprises a first tube shell and a second tube shell, wherein the first tube shell and the second tube shell are jointly enclosed to form a cavity, and the cavity wall of the cavity is at least provided with an inlet and an outlet; a third tube shell is further provided in the cavity, wherein the third tube shell and one of the first tube shell and the second tube shell are jointly enclosed to form a first muffler cavity, and a first muffler hole structure connected with the first muffler cavity is provided on the third tube shell, and the third tube shell and the other of the first tube shell and the second tube shell are jointly enclosed to form an intake passage, and the intake passage is respectively connected with the inlet, the outlet and the first muffler hole structure to weaken or eliminate the noise sound waves entering the intake pipe, and the first muffler cavity is formed by enclosing the third tube shell having the first muffler hole structure with one of the first tube shell and the second tube shell, and the muffler cavity is formed together with the third tube shell after an additional partition is provided to separate the cavity, and then the muffler cavity is formed together with the third tube shell, so that the internal structure of the intake pipe can be simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 This is a schematic diagram of the overall assembly structure of the air intake pipe according to the embodiment of the present disclosure;

[0022] Figure 2 It is a schematic diagram of the exploded structure of the air intake pipe according to the embodiment of the present disclosure;

[0023] Figure 3 It is a schematic diagram of the coordination of the first tube shell, the second tube shell and the third tube shell of the intake pipe according to the embodiment of the present disclosure;

[0024] Figure 4 It is a schematic diagram of the coordination of the second tube shell and the third tube shell of the intake pipe according to the embodiment of the present disclosure;

[0025] Figure 5 It is a schematic diagram of the coordination of the first tube shell and the fourth tube shell of the intake pipe according to the embodiment of the present disclosure;

[0026] Figure 6 It is a schematic structural diagram of the fourth tube shell of the intake pipe described in the embodiment of the present disclosure.

[0027] Reference numerals:

[0028] 1. First tube shell; 11. Outlet; 12. Inlet; 13. Air inlet passage; 2. Second tube shell; 3. Third tube shell; 31. First muffler hole structure; 4. First muffler cavity; 5. Second wavelength tube; 6. Fourth tube shell; 61. Second muffler hole structure; 62. Muffler tube; 7. First wavelength tube; 8. Second muffler cavity. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0031] Embodiment 1

[0032] Reference Figure 1 and Figure 2 As shown, this embodiment provides an air intake pipe, including a first tube shell 1 and a second tube shell 2.

[0033] The first tube shell 1 and the second tube shell 2 are enclosed together to form a cavity, and at least an inlet 12 and an outlet 11 are arranged on the cavity wall of the cavity.

[0034] A third tube shell 3 is also provided in the cavity, and the third tube shell 3 and one of the first tube shell 1 and the second tube shell 2 together enclose a first muffler cavity 4, and a first muffler hole structure 31 connected to the first muffler cavity 4 is provided on the third tube shell 3, and the third tube shell 3 and the other of the first tube shell 1 and the second tube shell 2 enclose an air intake channel 13, and the air intake channel 13 is respectively connected to the inlet 12, the outlet 11 and the first muffler hole structure 31, so that the inlet 12, the air intake channel, the first muffler cavity 4 and the outlet 11 are connected to form a muffler path for noise sound waves to flow.

[0035] Specifically, the first tube shell 1 and the second tube shell 2 can be connected by snap connection or by fasteners. Exemplarily, the third tube shell 3 can be enclosed with the second tube shell 2 to form the first muffler chamber 4, and the third tube shell 3 can be enclosed with the first tube shell 1 to form the air intake channel 13.

[0036] It should be noted that in addition to providing an inlet 12 on the wall of the cavity for noise waves to enter, an outlet 11 may also be provided on the wall of the cavity. The outlet 11 may be connected to the inlet 12 via an air intake passage 13. At this time, the outlet 11 may be considered as an exhaust port for noise waves, that is, the noise waves that are not eliminated may be discharged to the outside of the intake pipe via the air intake passage 13 and the outlet 11.

[0037] Furthermore, since the intake pipe in this embodiment is used for engine intake, the outlet 11 can be considered as the intake port when intake is provided to the engine, and the inlet 12 can be considered as the outlet when intake is provided to the engine. That is to say, when the intake pipe is used for intake to the engine, the airflow enters the intake pipe through the outlet 11 and is then transported to the engine through the inlet 12, and the noise sound waves generated by the engine enter the intake pipe through the inlet 12 for silencer, and the unsilenced part of the sound waves can be discharged to the outside of the intake pipe through the outlet 11, that is, the inlet and outlet directions of the noise sound waves are exactly opposite to the airflow direction of the gas transported to the engine.

[0038] Reference Figure 1 In the left and right directions of the drawings shown, the outlet 11 can be set at the left end of the first tube shell 1, and the inlet 12 can be set at the right end of the first tube shell 1. The external airflow can enter the intake pipe through the outlet 11 and flow along the intake passage and then enter the engine through the inlet 12 to achieve the intake operation of the engine. At the same time, the noise sound waves generated by the engine enter the intake pipe through the inlet 12 to achieve silence, and the noise sound waves that are not completely eliminated can be discharged through the outlet 11.

[0039] In order to reduce the noise generated by the engine, in this embodiment, referring to Figure 4 As shown, a first silencer hole structure 31 connected to the first silencer chamber 4 can be opened on the third tube shell 3, and the air intake channel is respectively connected to the inlet 12 and the first silencer hole structure 31, so that the inlet 12, the air intake channel, the first silencer chamber 4 and the outlet 11 are connected to form a silencer path for the noise sound waves to flow, so that the energy of the noise sound waves entering the intake pipe is gradually reduced during the propagation in the silencer path, and when the noise sound waves pass through the first silencer hole structure 31, a part of the sound energy of the noise is used to overcome friction resistance and viscosity, thereby being converted into heat energy, so that the audible sound part in the spectrum is significantly reduced, thereby achieving the purpose of noise reduction.

[0040] Furthermore, when the noise sound wave passes through the first muffler hole structure 31 and enters the first muffler cavity 4, the noise will continue to oscillate in the first muffler cavity 4. Due to the change in acoustic impedance, part of the sound energy is suppressed, and part of the sound energy is digested and converted into heat energy, thereby achieving the effect of noise reduction and silencing. At the same time, in this embodiment, by making the third tube shell 3 with the first muffler hole structure 31 and one of the first tube shell 1 and the second tube shell 2 enclose the first muffler cavity 4, it is also possible to avoid the need to set up an additional partition to separate the cavity and then form a muffler cavity together with the third tube shell, thereby simplifying the internal structure of the intake pipe.

[0041] In summary, the air intake pipe provided in the present embodiment includes a first tube shell 1 and a second tube shell 2, the first tube shell 1 and the second tube shell 2 are enclosed together to form a cavity, and at least an inlet 12 and an outlet 11 are arranged on the cavity wall; a third tube shell 3 is further arranged in the cavity, the third tube shell 3 and one of the first tube shell 1 and the second tube shell 2 are enclosed together to form a first muffler cavity 4, and a first muffler hole structure 31 connected to the first muffler cavity 4 is arranged on the third tube shell 3, the third tube shell 3 and the other of the first tube shell 1 and the second tube shell 2 are enclosed to form an air intake channel 13, and the air intake channel 13 are respectively connected with the inlet 12, the outlet 11 and the first muffler hole structure 31, so that the inlet 12, the air intake passage, the first muffler cavity 4 and the outlet 11 are connected to form a muffler path for the flow of noise sound waves, so as to weaken or eliminate the noise entering the air intake pipe, thereby avoiding the problem of occupying the internal space of the engine compartment caused by setting an additional muffler unit on the outside of the air intake pipe for noise reduction, so as to achieve the reasonable utilization of the internal space of the engine compartment, and avoid the problem of complex structure and high cost caused by setting an additional muffler unit for noise reduction. At the same time, by making the third tube shell 3 with the first muffler hole structure 31 enclosed with one of the first tube shell 1 and the second tube shell 2 to form the first muffler cavity 4, it is also possible to avoid setting an additional partition to separate the cavity and then forming the muffler cavity together with the third tube shell, so that the internal structure of the air intake pipe can be simplified.

[0042] Exemplarily, the first muffler hole structure 31 may be specifically composed of a plurality of muffler holes, and the pore size and porosity of the muffler holes may be set according to actual needs to be suitable for eliminating noises of different frequencies.

[0043] Reference Figure 4 As shown, in some embodiments, there are at least two first silencer cavities 4, and at least two first silencer cavities 4 are arranged in sequence along the length of the air intake pipe; there are at least two first silencer hole structures 31, and each first silencer hole structure 31 is connected one by one with at least one first silencer cavity 4.

[0044] When implementing it, refer to Figure 4 In the left and right directions of the drawings shown, there can be at least two first silencer cavities 4 distributed in sequence along the left and right directions, and at least two first silencer hole structures 31 are correspondingly arranged on the third tube shell 3, so that each first silencer cavity 4 can be connected to a first silencer hole structure 31 or each first silencer hole 31 can be connected to at least one first silencer cavity 4, thereby forming a complete porous silencer, and the sound absorption and noise reduction effect is further improved through the cooperation of at least two first silencer cavities 4 and at least two first silencer hole structures 31.

[0045] Exemplarily, the corresponding connection here may refer to the corresponding connection between the first silencer hole 31 and the first silencer chamber 4, that is, the projection of the first silencer hole structure 31 on the first silencer chamber 4 is located within the area where the first silencer chamber 4 is located, so that it is convenient to achieve the corresponding connection between the first silencer hole 31 and the first silencer chamber 4.

[0046] Exemplarily, the first muffler chamber 4 may be as follows Figure 4 The two shown in the figure, the first muffler hole structure 31 can also be provided with two accordingly. Alternatively, in other implementations, the first muffler cavity 4 can also be provided with three or more, and the first muffler hole structure 31 can also be provided with three or more. The specific number of the first muffler cavity 4 and the first muffler hole structure 31 can be set according to actual needs, and this embodiment does not make any specific limitation on this.

[0047] Reference Figure 2 and Figure 6 As shown, in some embodiments, a fourth tube shell 6 is further disposed in the cavity, and the fourth tube shell 6 is located between the first tube shell 1 and the third tube shell 3 . A first wavelength tube 7 communicating with the air inlet channel 13 is disposed on the fourth tube shell 6 .

[0048] In specific implementation, the first wavelength tube 7 can be considered as a closed tube connected to the air intake passage 13. The noise elimination principle is: when the noise sound wave enters the first wavelength tube 7 from the air intake passage, the sound wave is reflected back to the air intake passage by the closed end of the first wavelength tube 7. In this process, the sound waves of certain frequencies and the sound waves of the same frequency in the air intake passage cancel each other out due to their opposite phases, thereby achieving the purpose of noise elimination.

[0049] Exemplarily, the first wavelength tube 7 may be a 1 / 4 wavelength tube, which is mainly used to eliminate noise in the middle and low frequency bands. For example, the 1 / 4 wavelength tube mainly eliminates noise with a frequency of 500 Hz-2000 Hz.

[0050] Reference Figure 6 As shown, in some embodiments, there are at least two first wavelength tubes 7, and at least two first wavelength tubes 7 are arranged in sequence along the length of the intake pipe, so that sound insulation can be achieved by at least two first wavelength tubes 7 to further improve the sound insulation and noise reduction effect.

[0051] In specific implementation, the first wavelength tube 7 can be specifically provided with two, and the two first wavelength tubes 7 are arranged along Figure 4 Alternatively, the first wavelength tube 7 may be specifically configured as follows: Figure 6 The 5 first wavelength tubes 7 are shown along Figure 4 The left and right directions shown are separated and set in sequence.

[0052] Reference Figure 1As shown, in some embodiments, the height of the first wavelength tube 7 gradually increases along the direction from the inlet 12 to the outlet 11. Such a setting can not only better adapt to the contour shape of the entire intake pipe, but also in the process of the noise sound waves flowing from the inlet 12 to the outlet 11, the noise sound waves can be absorbed and silenced in turn by the first wavelength tube 7 with a larger height, and then further absorbed and silenced by the first wavelength tube 7 with a smaller height, thereby effectively enhancing the noise elimination effect.

[0053] Reference Figure 5 As shown, in some embodiments, a second wavelength tube 5 connected to the air inlet channel 13 is formed between the side of the fourth tube shell 6 and the side wall of the first tube shell 1, wherein the first wavelength tube 7 and the second wavelength tube 5 are arranged in sequence from the inlet 12 to the outlet 11.

[0054] That is to say, referring to Figure 5 In the left and right directions of the drawing shown, the left side surface of the fourth tube shell 6 and the side wall of the first tube shell 1 can jointly form a second wavelength tube 5, and the first wavelength tube 7 and the second wavelength tube 5 are arranged in sequence from the inlet 12 to the outlet 11, so that in the process of the noise sound wave flowing from the inlet 12 to the outlet 11, the noise sound wave is absorbed and silenced by the first wavelength tube 7 in sequence, and then further absorbed and silenced by the second wavelength tube 5, so that the noise sound wave can be effectively enhanced. The effect of silencing.

[0055] Exemplarily, the second wavelength tube 5 may also be a 1 / 4 wavelength tube, which is mainly used to eliminate noise in the middle and low frequency bands. For example, the 1 / 4 wavelength tube mainly eliminates noise with a frequency of 500 Hz-2000 Hz.

[0056] Reference Figure 5 As shown, in some embodiments, two second muffler chambers 8 are enclosed between the fourth tube shell 6 and the first tube shell 1, and the two second muffler chambers 8 are sequentially separated and arranged along the length of the intake pipe.

[0057] Further, the fourth tube shell 6 is provided with a second muffler hole structure 61 and a muffler pipe 62, and the muffler pipe 62 and the second muffler hole structure 61 are both connected to the air inlet passage 13. The muffler pipe 62 is located downstream of the second muffler hole structure 61, the first wavelength tube 7 is located between the second wavelength tube 5 and the muffler pipe 62, the second muffler hole structure 61 is connected to one of the two second muffler cavities 8, and the muffler pipe 62 is located in the other of the two second muffler cavities 8 and connected to the other of the two second muffler cavities 8.

[0058] When implementing it, refer to Figure 5 In the left and right directions of the drawing shown, two second muffler cavities 8 are formed between the fourth tube shell 6 and the first tube shell 1 .

[0059] Specifically, the second muffler hole structure 61 on the fourth tube shell 6 is connected to the second muffler cavity 8 on the right side to form a porous muffler, and the muffler pipe 62 on the fourth tube shell 6 is connected to the second muffler cavity 8 on the left side to form a muffler. Exemplarily, the muffler pipe 62 can be a Helmtz muffler, so that the muffler pipe 62 is connected to the second muffler cavity 8 on the left side to form a Helmtz muffler. The muffler principle of the Helmtz muffler is: when the noise sound wave moves in the muffler pipe 62 to the second muffler cavity 8, a part of the sound wave is reflected back, and the other part is divided into two branches, one way enters the second muffler cavity 8 or promotes the air movement in the second muffler cavity 8, and the other way continues to propagate in the muffler pipe 62 to form a transmission wave, thereby achieving the purpose of muffler noise reduction.

[0060] It should be noted that the purpose of connecting the second muffler hole structure 61 with the second muffler cavity 8 on the right side is to make the porous muffler formed by the second muffler hole structure 61 closer to the noise source, so as to eliminate the noise in the middle and high frequency bands.

[0061] Exemplarily, the second muffler hole structure 61 may be specifically composed of a plurality of muffler holes, and the pore size and porosity of the muffler holes may be set according to actual needs to be suitable for eliminating noises of different frequencies.

[0062] It should be noted that the first muffler hole structure 31 and the second muffler hole structure 61 are based on the fact that sound waves continuously reflect and interfere to consume energy during propagation, and they mainly eliminate medium and high frequency noise in the noise, such as noise with a frequency between 500Hz and 4000Hz. The muffler tube 62 mainly uses the reflection impedance of sound waves to achieve noise reduction, and it mainly eliminates low frequency noise in the noise, such as noise with a frequency below 500Hz.

[0063] In some embodiments, reference Figure 1 As shown, the second silencer hole structure 61, the silencer tube 62 and the first wavelength tube 7 are sequentially arranged along the direction from the inlet 12 to the outlet 11, so that in the process of the sound wave airflow flowing from the inlet 12 to the outlet 11, the medium and high frequency noise in the noise is first eliminated by the second silencer hole structure 61, and then the low frequency noise in the noise is eliminated by the silencer tube 62, and finally the medium frequency noise in the sound wave is eliminated by the first wavelength tube 7, so as to realize the sequential elimination operation of the whole frequency band of the noise, so that the sound elimination and noise reduction effect is better.

[0064] Embodiment 2

[0065] Reference Figures 1 to 6 As shown, this embodiment provides an engine intake system, including an intake pipe.

[0066] The specific structure and implementation principle of the intake pipe in this embodiment are the same as the structure of the intake pipe provided in Embodiment 1, and can bring the same or similar technical effects, which will not be described one by one here, and the details can be referred to the description of Embodiment 1.

[0067] In specific implementation, the intake pipe can be connected to the supercharger of the engine, or the intake pipe can also be connected to the throttle valve of the engine, so that external gas can enter the engine through the intake pipe, and the noise generated by the engine can enter the intake pipe for silencing and noise reduction.

[0068] Embodiment 3

[0069] Reference Figures 1 to 6 As shown, this embodiment also provides a vehicle, including an intake pipe or an engine intake system.

[0070] The specific structure and implementation principle of the intake pipe in this embodiment are the same as the structure of the intake pipe provided in Embodiment 1, and can bring the same or similar technical effects, which will not be described one by one here, and the details can be referred to the description of Embodiment 1.

[0071] The specific structure and implementation principle of the engine intake system in this embodiment are the same as the structure of the engine intake system provided in Example 2, and can bring the same or similar technical effects, which will not be described one by one here, and please refer to the description of Example 2 for details.

[0072] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0073] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air intake pipe, characterized in that: It includes a first tube shell and a second tube shell; The first tube shell and the second tube shell together enclose a cavity, and the cavity wall of the cavity is provided with at least an inlet and an outlet; A third tube shell is arranged in the cavity, and the third tube shell and one of the first tube shell and the second tube shell are together enclosed to form a first muffler cavity, and a first muffler hole structure connected to the first muffler cavity is arranged on the third tube shell, and the third tube shell and the other of the first tube shell and the second tube shell are enclosed to form an air intake channel, and the air intake channel is respectively connected to the inlet, the outlet and the first muffler hole structure.

2. The air intake pipe according to claim 1, characterized in that: There are at least two first silencer cavities, and the at least two first silencer cavities are sequentially separated and arranged along the length direction of the air inlet pipe; there are at least two first silencer hole structures, and each of the first silencer hole structures is connected to at least one of the first silencer cavities.

3. The air intake pipe according to claim 1, characterized in that: A fourth tube shell is also arranged in the cavity, and the fourth tube shell is located between the first tube shell and the third tube shell. A first wavelength tube communicating with the air inlet channel is arranged on the fourth tube shell.

4. The air intake pipe according to claim 3, characterized in that: There are at least two first wavelength tubes, and the at least two first wavelength tubes are arranged in sequence along the length direction of the air inlet pipe.

5. The air intake pipe according to claim 4, characterized in that: Along the direction from the inlet to the outlet, the height of the first wavelength tube gradually increases.

6. The air intake pipe according to claim 3, characterized in that: A second wavelength tube communicating with the air inlet passage is formed between the side surface of the fourth tube shell and the side wall of the first tube shell, wherein the first wavelength tube and the second wavelength tube are arranged in sequence from the inlet to the outlet.

7. The air intake pipe according to claim 6, characterized in that: The fourth tube shell and the first tube shell enclose two second muffler chambers, and the two second muffler chambers are sequentially separated and arranged along the length direction of the intake pipe.

8. The air intake pipe according to claim 7, characterized in that: The fourth tube shell is provided with a second silencer hole structure and a silencer pipe, and the silencer pipe and the second silencer hole structure are both connected to the air intake passage; the silencer pipe is located downstream of the second silencer hole structure, the first wavelength tube is located between the second wavelength tube and the silencer pipe, the second silencer hole structure is connected to one of the two second silencer cavities, and the silencer pipe is located in the other of the two second silencer cavities and connected to the other of the two second silencer cavities.

9. An engine air intake system, characterized in that: Comprising the air intake pipe according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The invention comprises an intake pipe as claimed in any one of claims 1 to 8 or an engine intake system as claimed in claim 9.

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