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, a second pipe shell and a third pipe shell. The first tube shell and the second tube shell are connected and define a cavity, the cavity comprises a first silencing cavity and an air inlet channel which are separated from each other, one of the first tube shell and the second tube shell is provided with an inlet and an outlet, and the inlet and the outlet are both communicated with the air inlet channel. The third pipe shell is located in the air inlet channel and communicates with a first silencing pipe, the first silencing pipe is located in the first silencing cavity and communicates with the first silencing cavity so that noise entering the air inlet pipe can be eliminated, and the first silencing cavity communicating with the first silencing pipe is defined by the first pipe shell and the second pipe shell jointly. Therefore, the situation that a partition plate is additionally arranged to separate the cavity and then forms a silencing cavity together with the third pipe shell can be avoided, and the internal structure of the air inlet pipe 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, a second pipe shell and a third pipe shell;

[0006] The first tube shell and the second tube shell are connected and enclosed to form a cavity, the cavity includes a first muffler cavity and an air intake channel separated from each other, one of the first tube shell and the second tube shell is provided with an inlet and an outlet, the inlet and the outlet are both connected to the air intake channel; the third tube shell is located in the air intake channel and the third tube shell is connected to a first muffler pipe, the first muffler pipe is located in the first muffler cavity and is connected to the first muffler cavity.

[0007] In some embodiments, there are at least two first silencer tubes, and along the width direction of the third tube shell, at least two first silencer tubes are arranged on opposite sides of the third tube shell; there are at least two first silencer chambers, and the first silencer chambers are connected to the first silencer tubes one by one.

[0008] In some embodiments, the first muffler is a Helmtz muffler; and / or the first muffler is integrally formed with the third tube shell.

[0009] In some embodiments, the first muffler is disposed on the third tube shell and away from the inlet.

[0010] In some embodiments, a fourth tube shell is further disposed in the air inlet passage, 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 passage is disposed on the fourth tube shell.

[0011] In some embodiments, there are at least two first wavelength tubes, and at least two first wavelength tubes are arranged in sequence along the length direction of the air inlet pipe;

[0012] Along the direction from the inlet to the outlet, the height of the first wavelength tube gradually increases.

[0013] 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.

[0014] 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.

[0015] In some embodiments, a silencer hole structure and a second silencer tube are provided on the fourth tube shell, and both the second silencer tube and the silencer hole structure are connected to the air intake passage; the second silencer tube is located downstream of the silencer hole structure, the first wavelength tube is located between the second wavelength tube and the second silencer tube, the silencer hole structure is connected to one of the two second silencer cavities, and the second silencer tube is located in the other of the two second silencer cavities and is connected to the other of the two second silencer cavities.

[0016] In a second aspect, the present disclosure provides an engine intake system, comprising an intake pipe.

[0017] In a third aspect, the present disclosure provides a vehicle including an air intake pipe or an engine air intake system.

[0018] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0019] The present disclosure provides an intake pipe, an engine intake system and a vehicle, wherein the intake pipe comprises a first tube shell, a second tube shell and a third tube shell; the first tube shell and the second tube shell are connected and enclosed to form a cavity, the cavity comprises a first muffler cavity and an intake passage separated from each other, an inlet and an outlet are arranged on one of the first tube shell and the second tube shell, and both the inlet and the outlet are connected to the intake passage. The third tube shell is located in the intake passage and is connected to a first muffler pipe, the first muffler pipe is located in the first muffler cavity and is connected to the first muffler cavity to weaken or eliminate the noise entering the intake pipe, and the first tube shell and the second tube shell are jointly enclosed to form a cavity, the cavity comprises the intake passage and the first muffler cavity separated from the intake passage, thereby avoiding the need to additionally set a 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] 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.

[0022] 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;

[0023] Figure 2 It is a schematic diagram of the exploded structure of the air intake pipe according to the embodiment of the present disclosure;

[0024] 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;

[0025] Figure 4 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 5 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; 4. First muffler cavity; 5. Second wavelength tube; 6. Fourth tube shell; 61. Muffler hole structure; 62. Second muffler; 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 , a second tube shell 2 and a third tube shell 3 .

[0033] The first tube shell 1 and the second tube shell 2 are connected and enclosed to form a cavity, which includes a first muffler chamber 4 and an air intake channel 13 separated from each other. An inlet 12 and an outlet 11 are provided on one of the first tube shell 1 and the second tube shell 2, and both the inlet 12 and the outlet 11 are connected to the air intake channel 13.

[0034] The third tube shell 3 is located in the air intake channel 13 and is connected to the first silencer 31. The first silencer 31 is located in the first silencer chamber 4 and is connected to the first silencer chamber 4, so that the inlet 12, the outlet 11, the air intake channel 13, the first silencer 31 and the first silencer chamber 4 are connected to form a silencer path for noise sound waves to flow.

[0035] Specifically, the first tube shell 1 and the second tube shell 2 may be connected by snap-fitting or by fasteners.

[0036] It should be noted that, in addition to providing an inlet 12 for noise sound waves to enter on one of the first tube shell 1 and the second tube shell 2, an outlet 11 can also be provided on one of the first tube shell 1 and the second tube shell 2. The outlet 11 can be connected to the inlet 12 through the air intake passage 13. At this time, the outlet 11 can be considered as an exhaust port for noise sound waves, that is, the noise sound waves that are not eliminated can be discharged to the outside of the intake pipe through the air intake passage and the outlet 11.

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

[0038] When implementing it, refer to Figure 1 In the left and right directions of the drawings shown, the inlet 12 and the outlet 11 can both be arranged on the first tube shell 1. In this case, the outlet 11 can be arranged at the left end of the first tube shell 1, and the inlet 12 can be arranged 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 13 before entering the engine through the inlet 12 to achieve the intake operation of the engine. At the same time, the inlet 12 can be understood as the inlet of the noise generated by the engine, and the outlet 11 can be understood as the outlet, that is, the noise generated by the engine enters the intake pipe through the inlet 12 and is discharged through the outlet 11.

[0039] In order to silence and reduce the noise generated by the engine, the second tube shell 2 and the first tube shell 1 in this embodiment are enclosed to form a cavity, and the cavity includes a first muffler 31 arranged in a first muffler cavity 4 separated from each other, one end of the first muffler 31 is connected to the first muffler cavity 4, and the other end of the first muffler 31 is connected to the third tube shell 3 located in the intake channel 13, that is, the other end of the first muffler 31 is connected to the intake channel 13, so that the inlet 12, the outlet 11, the intake channel 13, the first muffler 31 and the first muffler cavity 4 are connected to form a muffler path for the flow of noise sound waves. Exemplarily, the first muffler 31 can be a Helmtz muffler, and the first muffler cavity 4 and the first muffler 31 together constitute a Helmtz muffler.

[0040] The specific sound elimination principle of the Helmholtz silencer is as follows: when the sound wave of the noise moves in the first silencer tube 31 to the first silencer chamber 4, a part of the sound wave is reflected back, and the other part is divided into two branches, one of which enters the first silencer chamber 4 or promotes the movement of air in the first silencer chamber 4, and the other part continues to propagate in the first silencer tube 31 to form a transmitted wave, thereby achieving the purpose of sound elimination and noise reduction.

[0041] In summary, the intake pipe provided in the present embodiment includes a first tube shell 1, a second tube shell 2 and a third tube shell 3 by setting the intake pipe, and a cavity is formed between the second tube shell 2 and the first tube shell 1, the cavity includes a first muffler chamber 4 and an intake channel 13 separated from each other, the third tube shell 3 is located in the intake channel 13 and the third tube shell 3 is connected to the first muffler 31, the first muffler 31 is located in the first muffler chamber 4 and is connected to the first muffler chamber 4, so that the noise entering the intake pipe can be weakened or eliminated, thereby avoiding the problem of occupying the internal space of the engine compartment caused by additionally setting a muffler unit on the outside of the intake pipe for noise reduction, and thus is conducive to realizing the rational use of the internal space of the engine compartment, and can avoid the problem of complex structure and high cost caused by additionally setting a muffler unit for noise reduction. At the same time, the first tube shell 1 and the second tube shell 2 together form a cavity, which includes a first muffler cavity 4 and an air intake channel 13 separated from each other, thereby avoiding the need to set up an additional partition to separate the cavity and then enclose the muffler cavity with the third tube shell to form a muffler cavity, thereby simplifying the internal structure of the intake pipe.

[0042] Reference Figures 1 to 3 As shown, in some embodiments, there are at least two first silencer tubes 31, and along the width direction of the third tube shell 3, at least two first silencer tubes 31 are arranged on opposite sides of the third tube shell 3; there are at least two first silencer chambers 4, and the first silencer chambers 4 are connected to the first silencer tubes 31 one by one.

[0043] In specific implementation, the width direction of the third tube shell 3 can refer to Figure 3 In the left and right directions shown in the figure, the specific width direction of the third tube shell 3 may be a direction perpendicular to the direction from the inlet 12 to the outlet 11. Along the width direction of the third tube shell 3, at least two first muffler pipes 31 are arranged on opposite sides of the third tube shell 3, that is, at least two first muffler pipes 31 are arranged on the third tube shell 3 along the width direction. Figure 3 As shown in the left and right directions, the first muffler chamber 4 can be arranged at intervals on both sides of the third tube shell 3 along the left and right directions, and the first muffler chamber 4 can be separated from the air intake channel 13 formed by the first tube shell 1 and the second tube shell 2. A first muffler tube 31 can be arranged in each first muffler chamber 4, so that each first muffler chamber 4 and a first muffler tube 31 constitute a complete Helmholtz muffler, thereby achieving the effect of further improving the muffler and noise reduction by at least two Helmholtz mufflers.

[0044] Exemplarily, the first muffler chamber 4 may be as follows Figure 3As shown in the figure, two first muffler tubes 31 may be provided accordingly. Alternatively, in other implementations, three or more first muffler chambers 4 may be provided, and three or more first muffler tubes 31 may also be provided. The specific number of first muffler chambers 4 and first muffler tubes 31 may also be set based on actual needs, and this embodiment does not specifically limit this.

[0045] In some embodiments, the first muffler 31 and the third tube shell 3 may be integrally formed, thereby saving manufacturing steps and improving the overall structural strength of the third tube shell 3. Alternatively, in other implementations, the first muffler 31 and the third tube shell 3 may be independently formed and then bonded or clamped together.

[0046] Exemplarily, when the first silencer tube 31 is connected one-to-one with the first silencer chamber 4, the first silencer tube 31 and the first silencer chamber 4 can be correspondingly arranged and connected, that is, the projection of the first silencer tube 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 realize the one-to-one connection between the first silencer tube 31 and the first silencer chamber 4.

[0047] Reference Figure 2 and Figure 5 As shown, in some embodiments, a fourth tube shell 6 is further provided in the air inlet passage, the fourth tube shell 6 is located between the first tube shell 1 and the third tube shell 3, and a first wavelength tube 7 communicating with the air inlet passage is provided 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. The principle of noise elimination is as follows: when the sound wave of the noise 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 5 As shown, in some embodiments, there are at least two first wavelength tubes 7, and the at least two first wavelength tubes 7 are arranged sequentially in the length direction of the air inlet pipe, so that sound elimination can be achieved by at least two first wavelength tubes 7 together to further improve the sound elimination 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 3 Alternatively, the first wavelength tube 7 may be specifically configured as follows: Figure 5 The 5 first wavelength tubes 7 are shown along Figure 3 The left and right directions shown are separated and set in sequence.

[0052] Reference Figure 1 As shown, in some embodiments, the height of the first wavelength tube 7 can be gradually increased 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 by the first wavelength tube 7 with a larger height in turn, 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 4 As shown, in some embodiments, a second wavelength tube 5 connected to the air inlet channel 13 is formed between the side surface 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, 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, thereby effectively enhancing the silencer effect.

[0054] That is to say, referring to Figure 4 In the left-right direction 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 form a second wavelength tube 5 together.

[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 4 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 in the length direction of the air inlet pipe.

[0057] The second silencer pipe 62 and the silencer hole structure 61 are both connected to the air intake passage 13; the second silencer pipe 62 is located downstream of the silencer hole structure 61, the first wavelength tube 7 is located between the second wavelength tube 5 and the second silencer pipe 62, the silencer hole structure 61 is connected to one of the two second silencer cavities 8, and the second silencer pipe 62 is located in the other of the two second silencer cavities 8 and is connected to the other of the two second silencer cavities 8.

[0058] When implementing it, refer to Figure 4In 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 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 second muffler pipe 62 on the fourth tube shell 6 is connected to the second muffler cavity 8 on the left side to form a Helmtz muffler. The specific structure and principle of the Helmtz muffler can refer to the above introduction to the principle and structure of the Helmtz muffler, which will not be repeated here.

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

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

[0062] It should be noted that the muffler hole structure 61 is based on the fact that sound waves continuously reflect and interfere when propagating, and consume energy. It mainly eliminates medium and high frequency noise in the noise, such as noise with a frequency between 500Hz and 4000Hz. The first muffler 31 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] Exemplarily, the silencer hole structure 61 may be specifically composed of a plurality of silencer hole arrays. The specific aperture and porosity of the silencer holes may be set according to actual needs so as to be suitable for eliminating noises of different frequencies. This embodiment does not specifically limit the aperture and porosity of the silencer holes.

[0064] In some embodiments, reference Figure 1 As shown, the silencer hole structure 61, the second 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 silencer hole structure 61, and then the low frequency noise in the noise is eliminated by the second 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.

[0065] Embodiment 2

[0066] Reference Figures 1 to 5 As shown, this embodiment provides an engine intake system, including an intake pipe.

[0067] 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.

[0068] 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.

[0069] Embodiment 3

[0070] Reference Figures 1 to 5 As shown, this embodiment also provides a vehicle, including an intake pipe or an engine intake system.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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, a second tube shell and a third tube shell; The first tube shell and the second tube shell are connected and enclosed to form a cavity, the cavity includes a first muffler cavity and an air inlet passage separated from each other, one of the first tube shell and the second tube shell is provided with an inlet and an outlet, and the inlet and the outlet are both communicated with the air inlet passage; The third tube shell is located in the air inlet passage and is connected to a first muffler pipe. The first muffler pipe is located in the first muffler cavity and is connected to the first muffler cavity.

2. The air intake pipe according to claim 1, characterized in that: There are at least two first silencer pipes, and along the width direction of the third tube shell, at least two first silencer pipes are arranged on opposite sides of the third tube shell; there are at least two first silencer cavities, and the first silencer cavities are connected to the first silencer pipes one by one.

3. The air intake pipe according to claim 1, characterized in that: The first muffler is disposed on the third tube shell and is far away from the inlet.

4. The air intake pipe according to any one of claims 1 to 3, characterized in that: A fourth tube shell is further arranged in the air inlet passage, 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 passage is arranged on the fourth tube shell.

5. The air intake pipe according to claim 4, 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; 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 4, characterized in that: 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; 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 direction of the air intake pipe.

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