Air intake pipe, engine air intake system, and vehicle

Abstract

An air intake pipe, an engine air intake system, and a vehicle. The air intake pipe comprises a first pipe shell (1) and a second pipe shell (2). The first pipe shell (1) and the second pipe shell (2) jointly define a cavity. An inlet (12) and an outlet (11) are formed in the cavity wall of the cavity. A third pipe shell (3) is further provided in the cavity. The third pipe shell (3) and one of the first pipe shell (1) and the second pipe shell (2) jointly define a first silencing cavity (4), and a first silencing hole structure (31) communicated with the first silencing cavity (4) is provided on the third pipe shell (3). The third pipe shell (3) and the other one of the first pipe shell (1) and the second pipe shell (2) define an air intake passage (13), and the air intake passage (13) is communicated with the outlet (11), the inlet (12) and the first silencing hole structure (31), respectively. Alternatively, the first pipe shell (1) and the second pipe shell (2) are connected and define the cavity; the cavity comprises the first silencing cavity (4) and the air intake passage (13) which are spaced apart from each other; one of the first pipe shell (1) and the second pipe shell (2) is provided with the inlet (12) and the outlet (13); and the inlet (12) and the outlet (13) are both communicated with the air intake passage.

Description

intake manifold, engine intake system and vehicle

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese patent applications filed on May 6, 2024, with application numbers 202420960260.2 entitled "Intake pipe, engine intake system and vehicle" and 202420960209.1 entitled "Intake pipe, engine intake system and vehicle", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of engine technology, and more particularly to an intake manifold, an engine intake system, and a vehicle. Background Technology

[0004] The intake manifold is an important component of the engine's intake system. It provides clean air to the engine and also transmits engine noise through it.

[0005] When several independent muffler units are connected to the outside of the intake pipe to reduce engine noise, the muffler units tend to occupy internal space in the engine compartment. To address this issue, a method of integrating muffler units within the intake pipe has been proposed. Specifically, the intake pipe may include two housings that enclose a cavity for air intake and exhaust. A baffle is then installed within the cavity to divide it into multiple sub-chambers. Each sub-chamber contains a pipe with integrated muffler components, which together with the sub-chambers form a muffler chamber. This results in a complex internal structure for the entire intake pipe. Summary of the Invention

[0006] To address the aforementioned technical problems, this disclosure provides an intake manifold, an engine intake system, and a vehicle.

[0007] In one aspect, this disclosure provides an intake pipe, including a first pipe shell and a second pipe shell;

[0008] The first shell and the second shell together form a cavity, and the cavity wall is provided with at least an inlet and an outlet;

[0009] The cavity is further provided with a third tube shell, which together with one of the first tube shell and the second tube shell forms a first silencing cavity. The third tube shell is provided with a first silencing hole structure that communicates with the first silencing cavity. The third tube shell and the other of the first tube shell and the second tube shell form an air intake channel, which communicates with the inlet, the outlet and the first silencing hole structure respectively.

[0010] Alternatively, the first shell and the second shell are connected and enclosed to form a cavity, the cavity including a first silencing cavity and an air intake channel separated from each other, and one of the first shell and the second shell is provided with an inlet and an outlet, both of which are connected to the air intake channel.

[0011] The third casing is located inside the air intake channel and is connected to a first silencer pipe, which is located in and connected to the first silencer cavity.

[0012] In some embodiments, there are at least two first silencing cavities, which are sequentially separated along the length of the air intake pipe; there are at least two first silencing hole structures, each of which is connected to at least one of the first silencing cavities.

[0013] In some embodiments, there are at least two first silencers, and at least two first silencers are disposed on opposite sides of the third shell along the width direction of the third shell; there are at least two first silencers, and each first silencer is connected to one of the first silencers.

[0014] In some embodiments, the first silencer is disposed on the third casing and away from the inlet.

[0015] In some embodiments, there are at least two first silencers, and at least two first silencers are disposed on opposite sides of the third shell along the width direction of the third shell; there are at least two first silencers, and each first silencer is connected to one of the first silencers.

[0016] In some embodiments, the first silencer is disposed on the third casing and away from the inlet.

[0017] In some embodiments, a fourth tube shell is further provided inside the cavity, the fourth tube shell is located between the first tube shell and the third tube shell, and a first wavelength tube communicating with the air intake channel is provided on the fourth tube shell;

[0018] Alternatively, a fourth tube shell may be provided in the air intake channel, and the fourth tube shell may be located between the first tube shell and the third tube shell, and a first wavelength tube that communicates with the air intake channel may be provided on the fourth tube shell.

[0019] In some embodiments, there are at least two first wavelength tubes, and the at least two first wavelength tubes are arranged sequentially along the length direction of the air inlet pipe.

[0020] In some embodiments, the height of the first wavelength tube gradually increases along the direction from the inlet to the outlet.

[0021] In some embodiments, a second wavelength tube communicating with the air intake channel is formed between the side of the fourth shell and the side wall of the first shell, wherein the first wavelength tube and the second wavelength tube are arranged sequentially along the direction from the inlet to the outlet.

[0022] In some embodiments, the fourth shell and the first shell enclose two second silencing cavities, which are sequentially separated along the length of the air intake pipe.

[0023] In some embodiments, the fourth casing is provided with a second silencing hole structure and a silencing pipe, both of which are connected to the air intake channel. A second wavelength pipe, which is connected to the air intake channel, is formed between the side of the fourth casing and the side wall of the first casing. The silencing pipe is located downstream of the second silencing hole structure. The first wavelength pipe is located between the second wavelength pipe and the silencing pipe. The second silencing hole structure is connected to one of the two second silencing cavities. The silencing pipe is located in the other of the two second silencing cavities and is connected to the other of the two second silencing cavities.

[0024] Secondly, this disclosure provides an engine intake system, including an intake manifold.

[0025] Thirdly, this disclosure provides a vehicle including an intake manifold or an engine intake system.

[0026] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0027] This disclosure provides an intake pipe, an engine intake system, and a vehicle. The intake pipe includes a first shell and a second shell, which together enclose a cavity. The cavity wall has at least an inlet and an outlet. A third shell is also provided inside the cavity. The third shell, together with one of the first and second shells, forms a first silencing cavity. The third shell has a first silencing hole structure communicating with the first silencing cavity. The third shell, together with the other of the first and second shells, forms an intake channel. The intake channel communicates with the inlet, the outlet, and the first silencing hole structure to weaken or eliminate noise waves entering the intake pipe. Furthermore, by having the third shell with the first silencing hole structure enclose the first silencing cavity with one of the first and second shells, it is possible to avoid the need for additional partitions to separate the cavity before forming the silencing cavity with the third shell, thus simplifying the internal structure of the intake pipe. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0029] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 is a schematic diagram of the overall assembly structure of the intake pipe according to an embodiment of this disclosure;

[0031] Figure 2 is an exploded structural diagram of the intake pipe according to an embodiment of this disclosure;

[0032] Figure 2A is an exploded view of another embodiment of the intake pipe described in this disclosure;

[0033] Figure 3 is a schematic diagram of the fit between the first shell, the second shell, and the third shell of the intake pipe according to an embodiment of this disclosure;

[0034] Figure 3A is a schematic diagram of another possible fit between the first shell, the second shell, and the third shell of the intake pipe according to an embodiment of this disclosure;

[0035] Figure 4 is a schematic diagram of the fit between the second and third shells of the intake pipe according to an embodiment of this disclosure;

[0036] Figure 5 is a schematic diagram of the fit between the first and fourth shells of the intake pipe according to an embodiment of the present disclosure;

[0037] Figure 6 is a schematic diagram of the structure of the fourth shell of the intake pipe according to an embodiment of this disclosure.

[0038] Reference numerals: 1-First shell; 11-Outlet; 12-Inlet; 13-Inlet channel; 2-Second shell; 3-Third shell; 31-First silencer structure; 311-First silencer pipe; 4-First silencer cavity; 5-Second wavelength pipe; 6-Fourth shell; 61-Second silencer structure; 62-Silencer pipe; 7-First wavelength pipe; 8-Second silencer cavity. Specific Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0040] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0041] Example 1

[0042] Referring to Figures 1 and 2, this embodiment provides an air intake pipe, including a first pipe shell 1 and a second pipe shell 2.

[0043] The first shell 1 and the second shell 2 together form a cavity, and the cavity wall is provided with at least an inlet 12 and an outlet 11.

[0044] A third shell 3 is also provided inside the cavity. The third shell 3, together with one of the first shell 1 and the second shell 2, forms a first silencing cavity 4. The third shell 3 is provided with a first silencing hole structure 31 that communicates with the first silencing cavity 4. The third shell 3, together with the other of the first shell 1 and the second shell 2, forms an air intake channel 13. The air intake channel 13 is connected to the inlet 12, the outlet 11 and the first silencing hole structure 31, so that the inlet 12, the air intake channel, the first silencing cavity 4 and the outlet 11 are connected to form a silencing path that allows noise sound waves to flow.

[0045] Specifically, the first shell 1 and the second shell 2 can be connected by snap-fit ​​or by fasteners. For example, the third shell 3 can be together with the second shell 2 to form the first silencing cavity 4, and the third shell 3 can be together with the first shell 1 to form the air intake channel 13.

[0046] It should be noted that, in addition to setting an inlet 12 on the cavity wall for noise sound waves to enter, an outlet 11 can also be set on the cavity wall. The outlet 11 can be connected to the inlet 12 through the air intake channel 13. In this case, the outlet 11 can be considered as the outlet for noise sound waves, that is, the unremoved noise sound waves can be discharged to the outside of the air intake pipe through the air intake channel 13 and the outlet 11.

[0047] Furthermore, since the intake pipe in this embodiment is used for engine air intake, outlet 11 can be considered as the air inlet when air is introduced into the engine, and inlet 12 can be considered as the air outlet when air is introduced into the engine. That is to say, when the intake pipe is used to introduce air into the engine, the airflow enters the intake pipe through outlet 11 and is then delivered to the engine through inlet 12. The noise generated by the engine enters the intake pipe through inlet 12 for noise reduction, and any remaining noise waves can be discharged outside the intake pipe through outlet 11. In other words, the direction of noise wave entry and exit is exactly opposite to the direction of airflow of the gas delivered into the engine.

[0048] Referring to the left-right orientation of the drawing shown in Figure 1, the outlet 11 can be located at the left end of the first casing 1, and the inlet 12 can be located at the right end of the first casing 1. External airflow can enter the intake pipe through the outlet 11 and flow along the intake passage before entering the engine through the inlet 12 to realize the engine's intake operation. At the same time, the noise waves generated by the engine enter the intake pipe through the inlet 12 to achieve noise reduction, and any remaining noise waves can be discharged through the outlet 11.

[0049] In order to reduce the noise generated by the engine, in this embodiment, as shown in FIG4, a first silencing hole structure 31 communicating with the first silencing cavity 4 can be provided on the third pipe shell 3. The air intake channel is connected to the inlet 12 and the first silencing hole structure 31 respectively, so that the inlet 12, the air intake channel, the first silencing cavity 4 and the outlet 11 are connected to form a silencing path for noise sound waves to flow. Thus, the noise sound waves entering the intake pipe gradually reduce their energy during the propagation of the silencing path, and when the noise sound waves pass through the first silencing hole structure 31, part of the sound energy of the noise is used to overcome frictional resistance and viscosity, thereby becoming heat energy, which significantly reduces the audible part of the spectrum, thereby achieving the purpose of noise reduction.

[0050] Furthermore, as the noise waves pass through the first silencing hole structure 31 and enter the first silencing cavity 4, the noise will continuously oscillate within the first silencing cavity 4. Due to the change in acoustic impedance, some of the sound energy is suppressed, and some 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 having the third shell 3 with the first silencing hole structure 31 enclose one of the first shell 1 and the second shell 2 to form the first silencing cavity 4, it is also possible to avoid setting an additional partition to separate the cavity before forming the silencing cavity together with the third shell, thus simplifying the internal structure of the intake pipe.

[0051] In summary, the intake pipe provided in this embodiment includes a first pipe shell 1 and a second pipe shell 2, which together enclose a cavity. The cavity wall has at least an inlet 12 and an outlet 11. A third pipe shell 3 is also provided within the cavity. The third pipe shell 3, together with one of the first pipe shell 1 and the second pipe shell 2, forms a first silencing cavity 4. The third pipe shell 3 has a first silencing hole structure 31 communicating with the first silencing cavity 4. The third pipe shell 3, together with the other of the first pipe shell 1 and the second pipe shell 2, forms an intake channel 13. 13 is connected to inlet 12, outlet 11, and the first silencer structure 31, respectively, so that inlet 12, intake passage, first silencer cavity 4, and outlet 11 are connected to form a noise reduction path for noise sound waves to flow, thereby weakening or eliminating noise entering the intake pipe. This avoids the problem of occupying the internal space of the engine compartment caused by additional muffler units on the outside of the intake pipe for noise reduction, thus facilitating the rational use of the internal space of the engine compartment and avoiding the structural complexity and high cost caused by additional muffler units for noise reduction. At the same time, by having the third shell 3 with the first silencer structure 31 enclose one of the first shell 1 and the second shell 2 to form the first silencer cavity 4, it is also possible to avoid the need to set up additional partitions to separate the cavity and then form the silencer cavity together with the third shell, thus simplifying the internal structure of the intake pipe.

[0052] For example, the first silencing hole structure 31 can be composed of multiple silencing holes. The pore size and porosity of the silencing holes can be set according to actual needs to be suitable for eliminating noise of different frequencies.

[0053] Referring to FIG4, in some embodiments, there are at least two first silencing cavities 4, which are sequentially arranged along the length of the air intake pipe; there are at least two first silencing hole structures 31, each of which is connected to at least one first silencing cavity 4.

[0054] In specific implementation, referring to the left and right direction of the drawing shown in Figure 4, there can be at least two first silencing cavities 4 distributed sequentially in the left and right direction. At least two first silencing hole structures 31 are correspondingly provided on the third shell 3, so that each first silencing cavity 4 can be connected to a first silencing hole structure 31 or each first silencing hole 31 can be connected to at least one first silencing cavity 4, thereby forming a complete porous silencer. The effect of noise reduction is further improved by the cooperation of at least two first silencing cavities 4 and at least two first silencing hole structures 31.

[0055] For example, the corresponding connection here can refer to the first silencing hole 31 and the first silencing cavity 4 being connected in a corresponding position, that is, the projection of the first silencing hole structure 31 on the first silencing cavity 4 is located within the area where the first silencing cavity 4 is located, which facilitates the corresponding connection between the first silencing hole 31 and the first silencing cavity 4.

[0056] For example, there can be two first silencing cavities 4 as shown in Figure 4, and two first silencing hole structures 31 can also be provided accordingly. Alternatively, in other implementations, there can be three or more first silencing cavities 4, and three or more first silencing hole structures 31. The specific number of first silencing cavities 4 and first silencing hole structures 31 can be set according to actual needs, and this embodiment does not impose specific limitations on this.

[0057] Referring to Figures 2 and 6, in some embodiments, a fourth tube shell 6 is also provided inside the cavity. 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 intake channel 13 is provided on the fourth tube shell 6.

[0058] In practice, the first wavelength tube 7 can be considered as a closed tube connected to the intake channel 13. Its noise reduction principle is as follows: when noise waves enter the first wavelength tube 7 from the intake channel, the sound waves are reflected back to the intake channel by the closed end of the first wavelength tube 7. During this process, sound waves of certain frequencies cancel each other out with sound waves of the same frequency in the intake channel due to their opposite phase, thereby achieving the purpose of noise reduction.

[0059] For example, the first wavelength tube 7 can be a quarter-wavelength tube, which is mainly used to eliminate noise in the mid-to-low frequency range. For instance, the quarter-wavelength tube mainly eliminates noise in the frequency range of 500Hz-2000Hz.

[0060] Referring to FIG6, in some embodiments, there are at least two first wavelength tubes 7, which are arranged sequentially along the length of the air intake pipe, so that noise reduction can be achieved by the at least two first wavelength tubes 7 working together to further improve the noise reduction effect.

[0061] In a specific implementation, the first wavelength tube 7 can be set to two, with the two first wavelength tubes 7 arranged sequentially in the left-right direction as shown in Figure 4. Alternatively, the first wavelength tube 7 can be set to five, as shown in Figure 6, with the five first wavelength tubes 7 arranged sequentially in the left-right direction as shown in Figure 4.

[0062] Referring to Figure 1, in some embodiments, the height of the first wavelength tube 7 gradually increases along the direction from the inlet 12 to the outlet 11. This arrangement not only better adapts to the overall shape of the air intake pipe, but also allows the noise waves to be absorbed and silenced sequentially through the taller first wavelength tube 7 as they flow from the inlet 12 to the outlet 11, and then further absorbed and silenced through the shorter first wavelength tube 7. This effectively enhances the noise reduction effect.

[0063] Referring to FIG5, in some embodiments, a second wavelength tube 5 communicating with the air intake channel 13 is formed between the side of the fourth shell 6 and the side wall of the first shell 1, wherein the first wavelength tube 7 and the second wavelength tube 5 are arranged sequentially along the direction from the inlet 12 to the outlet 11.

[0064] In other words, referring to the left and right direction of the drawing shown in Figure 5, the left side of the fourth shell 6 and the side wall of the first shell 1 can together form a second wavelength tube 5. The first wavelength tube 7 and the second wavelength tube 5 are arranged sequentially along the direction from the inlet 12 to the outlet 11. As the noise wave flows from the inlet 12 to the outlet 11, it is absorbed and silenced by the first wavelength tube 7 in sequence, and then further absorbed and silenced by the second wavelength tube 5. This can effectively enhance the noise reduction effect.

[0065] For example, the second wavelength tube 5 can also be a quarter-wavelength tube, which is mainly used to eliminate noise in the mid-to-low frequency range. For instance, a quarter-wavelength tube mainly eliminates noise in the frequency range of 500Hz-2000Hz.

[0066] Referring to FIG5, in some embodiments, two second silencing cavities 8 are formed between the fourth shell 6 and the first shell 1, and the two second silencing cavities 8 are sequentially separated along the length of the air inlet pipe.

[0067] Furthermore, the fourth casing 6 is provided with a second silencing hole structure 61 and a silencing pipe 62, both of which are connected to the air intake channel 13. The silencing pipe 62 is located downstream of the second silencing hole structure 61, and the first wavelength tube 7 is located between the second wavelength tube 5 and the silencing pipe 62. The second silencing hole structure 61 is connected to one of the two second silencing cavities 8, and the silencing pipe 62 is located in and connected to the other of the two second silencing cavities 8.

[0068] In practice, referring to the left and right directions of the drawing shown in Figure 5, the fourth shell 6 and the first shell 1 enclose each other to form two second silencing cavities 8.

[0069] Specifically, the second silencing hole structure 61 on the fourth shell 6 is connected to the second silencing cavity 8 on the right side to form a porous silencer, and the silencing pipe 62 on the fourth shell 6 is connected to the second silencing cavity 8 on the left side to form a silencer. For example, the silencing pipe 62 can be a Helmholtz silencer, allowing it to connect to the second silencing cavity 8 on the left side to form a Helmholtz silencer. The silencing principle of the Helmholtz silencer is as follows: when noise waves move from the silencing pipe 62 to the second silencing cavity 8, part of the sound wave is reflected back, and the other part splits into two paths. One path enters the second silencing cavity 8 or pushes the air within the second silencing cavity 8, while the other path continues to propagate within the silencing pipe 62, forming a transmitted wave, thereby achieving the purpose of noise reduction.

[0070] It should be noted that the purpose of connecting the second silencing hole structure 61 with the second silencing cavity 8 on the right side is to make the multi-hole silencer formed by the second silencing hole structure 61 closer to the noise source, so as to eliminate the noise in the mid-to-high frequency range.

[0071] For example, the second silencing hole structure 61 can be composed of multiple silencing holes. The pore size and porosity of the silencing holes can be set according to actual needs to be suitable for eliminating noise of different frequencies.

[0072] It should be noted that the first silencing hole structure 31 and the second silencing hole structure 61 are based on the energy consumption caused by the continuous reflection and interference of sound waves during propagation. They mainly eliminate mid-to-high frequency noise, such as noise with a frequency between 500Hz and 4000Hz. The silencing tube 62 mainly utilizes the reflection impedance of sound waves to achieve noise reduction, and it mainly eliminates low-frequency noise, such as noise with a frequency below 500Hz.

[0073] In some embodiments, referring to FIG1, the second silencing hole structure 61, the silencing tube 62, and the first wavelength tube 7 are arranged sequentially along the direction from the inlet 12 to the outlet 11, so that during the flow of sound wave airflow from the inlet 12 to the outlet 11, the second silencing hole structure 61 first eliminates the mid-to-high frequency noise in the noise, then the silencing tube 62 eliminates the low frequency noise in the noise, and finally the first wavelength tube 7 eliminates the mid-frequency noise in the sound wave, so as to achieve sequential elimination of noise across the entire frequency band, resulting in better noise reduction effect.

[0074] In some other embodiments of this application, the intake pipe includes a first housing 1, a second housing 2, and a third housing 3.

[0075] The first shell 1 and the second shell 2 are connected and enclosed to form a cavity. The cavity includes a first silencing cavity 4 and an air intake channel 13 that are separated from each other. One of the first shell 1 and the second shell 2 is provided with an inlet 12 and an outlet 11. Both the inlet 12 and the outlet 11 are connected to the air intake channel 13.

[0076] The third shell 3 is located inside the air intake channel 13 and is connected to the first silencer pipe 311. The first silencer pipe 311 is located inside the first silencer cavity 4 and is connected to the first silencer cavity 4, so that the inlet 12, outlet 11, air intake channel 13, first silencer pipe 311 and first silencer cavity 4 are connected to form a noise reduction path that allows noise sound waves to flow.

[0077] Specifically, the first shell 1 and the second shell 2 can be connected by snap-fit ​​or by fasteners.

[0078] It should be noted that, in addition to providing an inlet 12 for noise sound waves to enter on one of the first shell 1 and the second shell 2, an outlet 11 can also be provided on one of the first shell 1 and the second shell 2. The outlet 11 can be connected to the inlet 12 through the air intake channel 13. In this case, the outlet 11 can be regarded as the outlet for noise sound waves, that is, the unremoved noise sound waves can be discharged to the outside of the air intake pipe through the air intake channel and the outlet 11.

[0079] Furthermore, since the intake pipe in this embodiment is used for engine air intake, outlet 11 can be considered as the air intake port, and inlet 12 can be considered as the air outlet. That is, when the intake pipe is used to intake air into the engine, the airflow enters the intake pipe through outlet 11 and is then delivered to the engine through inlet 12. The noise generated by the engine enters the intake pipe through inlet 12 for noise reduction, and any remaining noise waves can be discharged outside the intake pipe through outlet 11. In other words, the direction of noise wave entry and exit is exactly opposite to the direction of airflow into the engine.

[0080] In practical implementation, referring to the left-right direction of the drawing shown in Figure 1, both the inlet 12 and the outlet 11 can be located on the first casing 1. In this case, the outlet 11 can be located at the left end of the first casing 1, and the inlet 12 at the right end. 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, thus realizing the engine's intake operation. Simultaneously, the inlet 12 can be understood as the noise inlet 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.

[0081] To reduce engine noise, in this embodiment, a cavity is formed between the second shell 2 and the first shell 1. The cavity includes a first silencer 4, which is separated from the engine by a first silencer duct 311. One end of the first silencer duct 311 is connected to the first silencer 4, and the other end is connected to the third shell 3 located within the intake passage 13. This means the other end of the first silencer duct 311 is connected to the intake passage 13, thus creating a sound-absorbing path for noise waves to flow through the inlet 12, outlet 11, intake passage 13, first silencer duct 311, and first silencer 4. For example, the first silencer duct 311 can be a Helmholtz silencer, in which case the first silencer 4 and the first silencer duct 311 together constitute a Helmholtz silencer.

[0082] The specific sound reduction principle of the Helmtz silencer is as follows: when the sound waves of noise move from the first silencer tube 311 to the first silencer cavity 4, part of the sound waves are reflected back, and the other part is divided into two paths. One path enters the first silencer cavity 4 or pushes the air in the first silencer cavity 4 to move, and the other path continues to propagate in the first silencer tube 311 to form a transmitted wave, thereby achieving the purpose of sound reduction.

[0083] In summary, the intake pipe provided in this embodiment includes a first pipe shell 1, a second pipe shell 2, and a third pipe shell 3, with the second pipe shell 2 and the first pipe shell 1 forming a cavity. The cavity includes a first silencing cavity 4 and an intake channel 13 separated from each other. The third pipe shell 3 is located within the intake channel 13 and is connected to a first silencing pipe 311. The first silencing pipe 311 is located within and connected to the first silencing cavity 4. This allows for the weakening or elimination of noise entering the intake pipe, thus avoiding the problem of occupying internal engine compartment space caused by additional muffler units on the outside of the intake pipe for noise reduction. Therefore, it is beneficial to achieve reasonable utilization of the internal engine compartment space and avoids the problems of complex structure and high cost caused by additional muffler units for noise reduction. At the same time, the cavity is formed by the first shell 1 and the second shell 2 together. The cavity includes the first silencer 4 and the air intake channel 13 that are separated from each other. This avoids the need to set up additional partitions to separate the cavity and then form a silencer together with the third shell, thus simplifying the internal structure of the air intake pipe.

[0084] Referring to Figures 1, 2A, and 3A, in some embodiments, there are at least two first silencer pipes 311, which are respectively disposed on opposite sides of the third shell 3 along the width direction of the third shell 3; there are at least two first silencer cavities 4, which are connected to the first silencer pipes 311 one by one.

[0085] In specific implementation, the width direction of the third shell 3 can be the left-right direction as shown in Figure 3A, and specifically, the width direction of the third shell 3 can be a direction perpendicular to the direction from the inlet 12 to the outlet 11. Along the width direction of the third shell 3, at least two first silencer pipes 311 are respectively arranged on opposite sides of the third shell 3, that is, at least two first silencer pipes 311 are respectively arranged on opposite sides of the third shell 3 along the left-right direction as shown in Figure 3A. At this time, the first silencer cavities 4 can be arranged at intervals on both sides of the third shell 3 along the left-right direction. The first silencer cavities 4 can be separated from the air intake channel 13 formed between the first shell 1 and the second shell 2. Each first silencer cavity 4 can be provided with one first silencer pipe 311, so that each first silencer cavity 4 and one first silencer pipe 311 constitute a complete Helmholtz silencer, thereby achieving a further improvement in the noise reduction effect through at least two Helmholtz silencers.

[0086] For example, there can be two first silencing cavities 4 as shown in Figure 3A, and two first silencing pipes 311 can also be provided accordingly. Alternatively, in other implementations, there can be three or more first silencing cavities 4, and three or more first silencing pipes 311. The specific number of first silencing cavities 4 and first silencing pipes 311 can also be set according to actual needs, and this embodiment does not impose a specific limitation on this.

[0087] In some embodiments, the first silencer pipe 311 and the third shell 3 can be integrally formed, thereby saving manufacturing steps and improving the overall structural strength of the third shell 3. Alternatively, in other implementations, the first silencer pipe 311 can be formed independently with the third shell 3 and then glued or snapped together.

[0088] For example, when the first silencer pipe 311 and the first silencer cavity 4 are connected one by one, the first silencer pipe 311 and the first silencer cavity 4 can be correspondingly set and connected, that is, the projection of the first silencer pipe 311 on the first silencer cavity 4 is located within the area where the first silencer cavity 4 is located, which makes it easy to realize the one-to-one connection between the first silencer pipe 311 and the first silencer cavity 4.

[0089] Referring to Figures 2A and 6, in some embodiments, a fourth housing 6 is also provided in the air intake channel. The fourth housing 6 is located between the first housing 1 and the third housing 3, and a first wavelength tube 7 communicating with the air intake channel is provided on the fourth housing 6.

[0090] In practice, the first wavelength tube 7 can be considered as a closed tube connected to the air intake channel. Its noise reduction principle is as follows: when the sound wave of noise enters the first wavelength tube 7 from the air intake channel, the sound wave is reflected back to the air intake channel by the closed end of the first wavelength tube 7. During this process, some frequency sound waves cancel each other out with the sound waves of the same frequency in the air intake channel due to their opposite phase, thereby achieving the purpose of noise reduction.

[0091] For example, the first wavelength tube 7 can be a quarter-wavelength tube, which is mainly used to eliminate noise in the mid-to-low frequency range. For instance, the quarter-wavelength tube mainly eliminates noise in the frequency range of 500Hz-2000Hz.

[0092] Referring to FIG6, in some embodiments, there are at least two first wavelength tubes 7, and the length direction of the at least two first wavelength tubes 7 is arranged sequentially, so that the noise reduction can be achieved by the at least two first wavelength tubes 7 working together, thereby further improving the noise reduction effect.

[0093] In a specific implementation, the first wavelength tube 7 can be set to two, with the two first wavelength tubes 7 arranged sequentially and alternately along the left-right direction shown in Figure 3A. Alternatively, the first wavelength tube 7 can be set to five, as shown in Figure 6, with the five first wavelength tubes 7 arranged sequentially and alternately along the left-right direction shown in Figure 3A.

[0094] Referring to Figure 1, 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. This arrangement not only better adapts to the overall shape of the air intake pipe, but also allows the noise waves to be absorbed and silenced sequentially through the taller first wavelength tube 7 as they flow from the inlet 12 to the outlet 11, and then further absorbed and silenced by the shorter first wavelength tube 7. This effectively enhances the noise reduction effect.

[0095] Referring to FIG5, in some embodiments, a second wavelength tube 5 communicating with the air intake channel 13 is formed between the side of the fourth tube shell 6 and the side wall of the first tube shell 1. The first wavelength tube 7 and the second wavelength tube 5 are arranged sequentially along the direction from the inlet 12 to the outlet 11, so that as the noise wave flows from the inlet 12 to the outlet 11, the noise 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, which can effectively enhance the noise reduction effect.

[0096] In other words, referring to the left and right directions of the drawing shown in Figure 5, the left side of the fourth tube shell 6 and the side wall of the first tube shell 1 can together form a second wavelength tube 5.

[0097] For example, the second wavelength tube 5 can also be a quarter-wavelength tube, which is mainly used to eliminate noise in the mid-to-low frequency range. For instance, a quarter-wavelength tube mainly eliminates noise in the frequency range of 500Hz-2000Hz.

[0098] Referring to FIG5, in some embodiments, two second silencing cavities 8 are formed by enclosing the fourth shell 6 and the first shell 1, and the air inlet pipes of the two second silencing cavities 8 are sequentially separated along their length.

[0099] Both the muffler 62 and the second muffler hole structure 61 are connected to the air intake channel 13; the muffler 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 62, the second muffler hole structure 61 is connected to one of the two second muffler cavities 8, and the muffler 62 is located in the other of the two second muffler cavities 8 and is connected to the other of the two second muffler cavities 8.

[0100] In practice, referring to the left and right directions of the drawing shown in Figure 5, the fourth shell 6 and the first shell 1 enclose each other to form two second silencing cavities 8.

[0101] Specifically, the second silencing hole structure 61 on the fourth shell 6 is connected to the second silencing cavity 8 on the right side to form a porous silencer, and the silencing pipe 62 on the fourth shell 6 is connected to the second silencing cavity 8 on the left side to form a Helmtz silencer. The specific structure and principle of the Helmtz silencer can be found in the above introduction to the principle and structure of the Helmtz silencer, and will not be repeated here.

[0102] It should be noted that the purpose of connecting the second silencing hole structure 61 with the second silencing cavity 8 on the right side is to make the multi-hole silencer formed by the second silencing hole structure 61 closer to the noise source, so as to eliminate the noise in the mid-to-high frequency range.

[0103] For example, the second silencing hole structure 61 can be composed of multiple silencing holes. The pore size and porosity of the silencing holes can be set according to actual needs to be suitable for eliminating noise of different frequencies.

[0104] It should be noted that the second silencing structure 61 utilizes the energy dissipation caused by the continuous reflection and interference of sound waves during propagation. It primarily eliminates mid-to-high frequency noise, such as noise between 500Hz and 4000Hz. The first silencing tube 311 mainly utilizes the reflection impedance of sound waves to achieve noise reduction, primarily eliminating low-frequency noise, such as noise below 500Hz.

[0105] For example, the second silencing hole structure 61 can be composed of multiple silencing holes arranged in an array. The specific pore diameter and porosity of the silencing holes can be set according to actual needs to be suitable for eliminating noise of different frequencies. In this embodiment, the pore diameter and porosity of the silencing holes are not specifically limited.

[0106] In some embodiments, referring to FIG1, the second silencing hole structure 61, the silencing tube 62, and the first wavelength tube 7 are arranged sequentially along the direction from the inlet 12 to the outlet 11, so that during the flow of sound wave airflow from the inlet 12 to the outlet 11, the second silencing hole structure 61 first eliminates the mid-to-high frequency noise in the noise, then the silencing tube 62 eliminates the low frequency noise in the noise, and finally the first wavelength tube 7 eliminates the mid-frequency noise in the sound wave, so as to achieve sequential elimination of noise across the entire frequency band, resulting in better noise reduction effect.

[0107] Example 2

[0108] Referring to Figures 1 to 6, this embodiment provides an engine intake system, including an intake manifold.

[0109] The specific structure and implementation principle of the intake pipe in this embodiment are the same as those of the intake pipe provided in Embodiment 1, and can bring the same or similar technical effects. They will not be described in detail here. For details, please refer to the description in Embodiment 1.

[0110] In practice, the intake manifold can be connected to the engine's turbocharger or the engine's throttle valve, allowing external air to enter the engine through the intake manifold and reducing engine noise by allowing the noise generated during engine operation to enter the intake manifold.

[0111] Example 3

[0112] Referring to Figures 1 to 6, this embodiment also provides a vehicle, including an intake manifold or an engine intake system.

[0113] The specific structure and implementation principle of the intake pipe in this embodiment are the same as those of the intake pipe provided in Embodiment 1, and can bring the same or similar technical effects. They will not be described in detail here. For details, please refer to the description in Embodiment 1.

[0114] The specific structure and implementation principle of the engine intake system in this embodiment are the same as those of the engine intake system provided in Embodiment 2, and can bring the same or similar technical effects. They will not be described in detail here. For details, please refer to the description of Embodiment 2.

[0115] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variations thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0116] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily 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 this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intake pipe, comprising a first casing (1) and a second casing (2); The first shell (1) and the second shell (2) together enclose a cavity, and the cavity wall is provided with at least an inlet (12) and an outlet (11); The cavity is provided with a third shell (3), which together with one of the first shell (1) and the second shell (2) forms a first silencing cavity (4). The third shell (3) is provided with a first silencing hole structure (31) that communicates with the first silencing cavity (4). The third shell (3) together with the other of the first shell (1) and the second shell (2) forms an air intake channel (13). The air intake channel (13) is connected to the inlet (12), the outlet (11) and the first silencing hole structure (31) respectively. Alternatively, the first shell (1) and the second shell (2) are connected and enclosed to form a cavity, the cavity including a first silencing cavity (4) and an air intake channel (13) separated from each other, and one of the first shell (1) and the second shell (2) is provided with an inlet (12) and an outlet (11), the inlet (12) and the outlet (11) are both connected to the air intake channel (13); The third shell (3) is located inside the air intake channel (13) and is connected to the first silencer pipe (311). The first silencer pipe (311) is located in the first silencer cavity (4) and is connected to the first silencer cavity (4).

2. The intake pipe according to claim 1, wherein, There are at least two first silencing cavities (4), and the at least two first silencing cavities (4) are sequentially separated along the length of the air intake pipe; there are at least two first silencing hole structures (31), and each first silencing hole structure (31) is connected to at least one first silencing cavity (4).

3. The intake pipe according to claim 1 or 2, wherein, There are at least two first silencer pipes (311), and at least two first silencer pipes (311) are respectively disposed on opposite sides of the third shell (3) along the width direction of the third shell (3); there are at least two first silencer cavities (4), and the first silencer cavities (4) are connected to the first silencer pipes (311) one by one.

4. The intake pipe according to any one of claims 1-3, wherein, The first silencer pipe (311) is disposed on the third pipe shell (3) and is located away from the inlet (12).

5. The intake pipe according to any one of claims 1-4, wherein, The cavity is also provided with a fourth tube shell (6), which is located between the first tube shell (1) and the third tube shell (3), and the fourth tube shell (6) is provided with a first wavelength tube (7) that communicates with the air inlet channel (13); Alternatively, a fourth shell (6) may be provided in the air intake channel (13), and the fourth shell (6) may be located between the first shell (1) and the third shell (3), and a first wavelength tube (7) connected to the air intake channel (13) may be provided on the fourth shell (6).

6. The intake pipe according to claim 5, wherein, There are at least two first wavelength tubes (7), and at least two first wavelength tubes (7) are arranged sequentially along the length direction of the air inlet pipe.

7. The intake pipe according to claim 5 or 6, wherein, Along the direction from the inlet (12) to the outlet (11), the height of the first wavelength tube (7) gradually increases.

8. The intake pipe according to any one of claims 5-7, wherein, A second wavelength tube (5) communicating with the air intake 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 sequentially along the direction from the inlet (12) to the outlet (11).

9. The intake pipe according to any one of claims 5-8, wherein, The fourth shell (6) and the first shell (1) enclose each other to form two second silencing cavities (8), and the two second silencing cavities (8) are sequentially separated along the length of the air inlet pipe.

10. The intake pipe according to claim 9, wherein, The fourth shell (6) is provided with a second silencing hole structure (61) and a silencing pipe (62), and a second wavelength pipe (5) communicating with the air intake channel (13) is formed between the side of the fourth shell (6) and the side wall of the first shell (1). The silencing pipe (62) and the second silencing hole structure (61) are both connected to the air intake channel (13). The silencing pipe (62) is located downstream of the second silencing hole structure (61), the first wavelength pipe (7) is located between the second wavelength pipe (5) and the silencing pipe (62), the second silencing hole structure (61) is connected to one of the two second silencing cavities (8), and the silencing pipe (62) is located in the other of the two second silencing cavities (8) and is connected to the other of the two second silencing cavities (8).

11. An engine intake system, comprising an intake manifold as described in any one of claims 1 to 10.

12. A vehicle comprising an intake manifold as claimed in any one of claims 1 to 10, or comprising an engine intake system as claimed in claim 11.

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