Automobile air inlet duct structure

Abstract

The utility model relates to an automobile air inlet duct structure which comprises an outer pipe, an inner pipe is installed on the inner side of the outer pipe, through holes for sound absorption and noise reduction are formed in the surface of the inner pipe in an array mode, and a deformation support for adjusting the density of the through holes in a self-adaptive mode through temperature is installed on the inner side of the inner pipe. The sound absorption layer treats noise generated by air flowing in the air inlet air pipe, the deformation support can adapt to the temperature to be matched with the sound absorption layer, the interval and density of the through holes are adjusted, the sound absorption layer can be optimized in a self-adaptive noise reduction mode under different working conditions of an automobile engine, the noise reduction capacity of the air inlet air pipe is improved, and the experience of passengers in an automobile is optimized.

Description

Technical Field

[0001] This utility model relates to the field of automotive pipe components, specifically to an automotive air intake duct structure. Background Technology

[0002] The intake duct is the core channel of the car engine's intake system. It is responsible for introducing filtered air into the combustion chamber to participate in the fuel mixing and combustion process. Proper selection and maintenance of the intake duct can effectively optimize engine performance and balance engine power output and fuel economy.

[0003] When the engine is running, the air flowing inside the intake duct generates noise. In the process of using existing technology, the inventors found that the noise reduction effect of existing car intake ducts is poor. The intake duct cannot effectively reduce the noise generated by the internal air flow, which will cause the noise to be transmitted into the car and affect the passenger experience. Utility Model Content

[0004] Based on the above description, this utility model provides a car intake duct structure to solve the problem of poor noise reduction capability of existing car intake ducts.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: an automotive air intake duct structure, including an outer tube, an inner tube installed on the inner side of the outer tube, sound-absorbing and noise-reducing through holes arrayed on the surface of the inner tube, and a deformable bracket installed on the inner side of the inner tube to adaptively adjust the density of the through holes by temperature.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the outer tube includes a corrugated pipe and a connecting pipe, with the connecting pipe integrally formed at both ends of the corrugated pipe.

[0008] Furthermore, the inner tube includes a sound-absorbing layer and an inner cavity. The sound-absorbing layer is fixedly connected to the inside of the connecting tube, and the inner cavity is mesh-like and disposed inside the sound-absorbing layer.

[0009] Furthermore, the through holes are formed on the surface of the sound-absorbing layer, and the through holes are distributed in a ring array and located in the center of the grid of the inner cavity.

[0010] Furthermore, the deformable support is disposed on the inner side of the inner cavity, the deformable support is mesh-like and fits perfectly with the inner cavity, and the deformable support is a shape memory alloy made of nickel-titanium based material.

[0011] Furthermore, a connecting part is fixedly connected between the two sound-absorbing layers, and a low-friction nano-coating is provided on the inner side of both the connecting part and the sound-absorbing layer.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0013] This invention utilizes a sound-absorbing layer and a deformable bracket. The sound-absorbing layer addresses the noise generated by airflow within the air intake duct, while the deformable bracket adapts to temperature and works in conjunction with the sound-absorbing layer to adjust the spacing and density of the through holes. This allows the sound-absorbing layer to adaptively reduce noise under different operating conditions of the car engine, thereby increasing the noise reduction capability of the air intake duct and optimizing the passenger experience. Attached Figure Description

[0014] Figure 1 A cross-sectional structural diagram of an automotive air intake duct structure provided for an embodiment of this utility model;

[0015] Figure 2 This is a schematic diagram of the exploded structure of the outer tube and the inner tube in an embodiment of this utility model;

[0016] Figure 3 This is a cross-sectional structural diagram showing the connection relationship between the sound-absorbing layer and the deformable support in an embodiment of this utility model;

[0017] Figure 4 This is an exploded structural diagram of the sound-absorbing layer and the deformable support in an embodiment of this utility model;

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Outer tube; 11. Corrugated tube; 12. Connecting tube; 2. Inner tube; 21. Sound-absorbing layer; 22. Through hole; 23. Inner cavity; 3. Deformable support; 4. Connecting part. Detailed Implementation

[0020] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0022] Please see Figure 1-4 The present invention relates to an automotive air intake duct structure, comprising an outer duct 1, an inner duct 2 installed on the inner side of the outer duct 1, the surface of the inner duct 2 having an array of sound-absorbing and noise-reducing through holes 22, and a deformable bracket 3 installed on the inner side of the inner duct 2, the density of the through holes 22 being adaptively adjusted by temperature.

[0023] Please see Figure 1 The outer tube 1 includes a corrugated pipe 11 and a connecting pipe 12, with the connecting pipe 12 integrally formed at both ends of the corrugated pipe 11.

[0024] Please see Figure 4 The inner tube 2 includes a sound-absorbing layer 21 and an inner cavity 23. The sound-absorbing layer 21 is fixedly connected to the inner side of the connecting pipe 12. The inner cavity 23 is mesh-like and is located inside the sound-absorbing layer 21. Through holes 22 are opened on the surface of the sound-absorbing layer 21. The through holes 22 are distributed in a ring array and are located in the center of the mesh of the inner cavity 23. When air flows along the inner tube 2, the generated sound waves will enter the through holes 22 on the surface of the sound-absorbing layer 21 and form multiple reflections and refractions. They will also rub and vibrate with the hole wall of the through hole 22 and the material surface of the sound-absorbing layer 21, consuming sound energy and finally converting the sound energy into a small amount of heat energy. This effectively reduces the intensity of the sound waves, achieves the effect of sound absorption, and increases the noise reduction effect of the air intake duct.

[0025] Please see Figure 3 The deformable bracket 3 is located inside the inner cavity 23. The deformable bracket 3 is mesh-like and fits perfectly with the inner cavity 23. The deformable bracket 3 is a shape memory alloy made of nickel-titanium base. The deformable bracket 3 is embedded in the sound-absorbing layer 21. When the engine temperature is high, the deformable bracket 3 will expand due to heat, compressing the sound-absorbing layer 21 and reducing the density of the through holes 22, thus reducing the absorption capacity of high-frequency noise, but enhancing the mid-to-low frequency noise reduction effect. When the engine temperature is low, the deformable bracket 3 will shrink, increasing the density of the through holes 22 and improving the sound absorption performance for broadband noise. The deformable bracket 3 achieves temperature response deformation through thermoelastic phase change. After the deformable bracket 3 is combined with the sound-absorbing layer 21, the density of the through holes 22 can be dynamically adjusted, so that the inner tube 2 can take into account both broadband noise reduction and mid-to-low frequency noise reduction.

[0026] Please see Figure 2 A connecting part 4 is fixedly connected between the two sound-absorbing layers 21. Both the connecting part 4 and the inner side of the sound-absorbing layer 21 are provided with a low-friction nano-coating. The connecting part 4 connects the two inner tubes 2, so that the noise reduction effect of the inner tube 2 can cover the inner side of the outer tube 1, ensuring the coverage of the noise reduction effect of the inner tube 2. The connecting part 4 is a PE water pipe, which can deform together with the bending of the corrugated pipe 11 without affecting the bending use of the air intake pipe. The low-friction nano-coating can increase the friction and vibration between the sound wave and the inner tube 2 to avoid contact, consume sound energy, and enhance the noise reduction effect of the inner tube 2.

[0027] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A car intake duct structure, comprising an outer duct (1), characterized in that: An inner tube (2) is installed on the inner side of the outer tube (1). The surface of the inner tube (2) is arrayed with sound-absorbing and noise-reducing through holes (22). A deformable bracket (3) is installed on the inner side of the inner tube (2) to adjust the density of the through holes (22) by temperature adaptation.

2. The automotive air intake duct structure according to claim 1, characterized in that: The outer tube (1) includes a corrugated pipe (11) and a connecting pipe (12), wherein the connecting pipe (12) is integrally formed at both ends of the corrugated pipe (11).

3. The automotive air intake duct structure according to claim 2, characterized in that: The inner tube (2) includes a sound-absorbing layer (21) and an inner cavity (23). The sound-absorbing layer (21) is fixedly connected to the inner side of the connecting tube (12). The inner cavity (23) is mesh-like and is located inside the sound-absorbing layer (21).

4. The automotive air intake duct structure according to claim 3, characterized in that: The through holes (22) are formed on the surface of the sound-absorbing layer (21). The through holes (22) are arranged in a ring array and are located in the center of the grid of the inner cavity (23).

5. The automotive air intake duct structure according to claim 3, characterized in that: The deformable support (3) is disposed on the inner side of the inner cavity (23). The deformable support (3) is mesh-like and fits perfectly with the inner cavity (23). The deformable support (3) is a shape memory alloy made of nickel-titanium base.

6. The automotive air intake duct structure according to claim 3, characterized in that: A connecting part (4) is fixedly connected between the two sound-absorbing layers (21), and a low-friction nano-coating is provided on the inner side of both the connecting part (4) and the sound-absorbing layer (21).

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