阅读说明：本技术 一种进气降噪系统及其消声进气盒 (air inlet noise reduction system and silencing air inlet box thereof ) 是由 李有哲 谢富科 穆浩 郑灏 邓世林 李良 王占彬 郜盼盼 于 2018-07-19 设计创作，主要内容包括：本发明提供一种进气降噪系统及其消声进气盒,属于车辆零配件技术领域。本发明提供的一种消声进气盒,包括进气盒盒体,所述进气盒盒体上设有进气口和用于连接空气滤清器的进气管道；所述进气盒盒体内还设有弯折导流板,所述进气管道位于所述弯折导流板内侧；所述弯折导流板包括位于所述进气管道前侧的前侧导流板和位于所述进气管道旁侧的延长导流板。本发明利用弯折导流板,将进入进气盒内的气流分成两股,并引导两股气流在进气管道处汇合,汇合时使两股气流相差半个波长,从而在进气管道处形成波峰与波谷的叠加,降低进气噪声；且由于仅在进气盒内部增加一弯折导流板,具有结构简单、布置容易、成本低、易于工程推广应用的优点。(The invention provides a air inlet noise reduction system and a silencing air inlet box thereof, which belong to the technical field of vehicle accessories.A bending guide plate is also arranged in the air inlet box body, the air inlet pipe is positioned at the inner side of the bending guide plate, and the bending guide plate comprises a front side guide plate positioned at the front side of the air inlet pipe and an extension guide plate positioned at the side of the air inlet pipe.)

The silencing air inlet box comprises an air inlet box body, wherein an air inlet and an air inlet pipeline used for being connected with an air filter are arranged on the air inlet box body, and the silencing air inlet box is characterized in that a bent guide plate is further arranged in the air inlet box body, the air inlet pipeline is located on the inner side of the bent guide plate, and the bent guide plate comprises a front guide plate located on the front side of the air inlet pipeline and an extension guide plate located on the side of the air inlet pipeline.

2. The muffling air intake box of claim 1, wherein: the extension baffle further comprises an inward turned edge, and the turned edge is located on the rear side of the air inlet pipeline.

3. The muffling air intake box of claim 2, wherein: the tail end of the turning edge is provided with a connecting folding edge connected with the air inlet pipeline.

4. A muffling air intake box according to claim 1, 2 or 3, wherein: the air inlet box body comprises a top plate, a bottom plate and a circumferential side plate connected between the top plate and the bottom plate; the upper end of the bent guide plate is connected with the top plate, and the lower end of the bent guide plate is connected with the bottom plate; the air inlet is arranged on the circumferential side plate; the air inlet pipeline is arranged on the bottom plate; an air inlet gap is reserved between the inlet of the air inlet pipeline and the top plate.

5. The muffling air intake box of claim 4, wherein: and a water baffle is arranged at the front side air inlet of the front side guide plate.

The air inlet noise reduction system comprises an air filter and a silencing air inlet box, wherein the silencing air inlet box comprises an air inlet box body, an air inlet and an air inlet pipeline connected with the air filter are arranged on the air inlet box body, and the silencing air inlet system is characterized in that a bending guide plate is further arranged in the air inlet box body, the air inlet pipeline is located on the inner side of the bending guide plate, and the bending guide plate comprises a front side guide plate located on the front side of the air inlet pipeline and an extension guide plate located on the side of the air inlet pipeline.

7. The air intake noise reduction system of claim 6, wherein: the extension baffle further comprises an inward turned edge, and the turned edge is located on the rear side of the air inlet pipeline.

8. The air intake noise reduction system of claim 7, wherein: the tail end of the turning edge is provided with a connecting folding edge connected with the air inlet pipeline.

9. The intake noise reduction system of claim 6, 7 or 8, wherein: the air inlet box body comprises a top plate, a bottom plate and a circumferential side plate connected between the top plate and the bottom plate; the upper end of the bent guide plate is connected with the top plate, and the lower end of the bent guide plate is connected with the bottom plate; the air inlet is arranged on the circumferential side plate; the air inlet pipeline is arranged on the bottom plate; an air inlet gap is reserved between the inlet of the air inlet pipeline and the top plate.

10. The intake noise reduction system of claim 9, wherein: and a water baffle is arranged at the front side air inlet of the front side guide plate.

Technical Field

The invention relates to an air inlet noise reduction system and a silencing air inlet box thereof, belonging to the technical field of vehicle accessories.

Background

The traditional air intake system of the passenger car is air-an air intake box-an air filter-an engine supercharger, namely natural air firstly enters the air intake box, then is transmitted to the air filter from the air intake box for filtering, and finally clean air is transmitted to the engine supercharger through a pipeline and then enters the engine from the supercharger.

In the running process of a vehicle, particularly in the high-load running process of an engine, the air inlet sound is very loud, the noise is eliminated and reduced only by simply utilizing the air filter expansion cavity, the good noise reduction effect is difficult to achieve, and the air inlet noise is transmitted into the vehicle and can influence the comfort of a driver and passengers.

The patent document with publication number CN 2151259Y entitled "auxiliary noise reducer for automobile exhaust muffler" discloses auxiliary noise reducer for automobile exhaust muffler, which utilizes to form a cross-shaped deformation pipe to divide the airflow discharged from the engine into two parts to flow, then joins the two airflows at the position , and the sound waves of the two airflows are in the state of equal amplitude and opposite phase when joining, thus achieving the purpose of noise reduction.

Disclosure of Invention

The invention aims to provide air inlet noise reduction systems and a silencing air inlet box thereof, which are used for solving the problems of complex structure and difficult manufacture of the conventional vehicle noise reduction device.

In order to achieve the above object, the present invention provides air intake noise reduction systems and muffling air intake boxes thereof, comprising:

the invention provides silencing air inlet boxes, which comprise air inlet box bodies, wherein air inlets and air inlet pipelines used for being connected with an air filter are arranged on the air inlet box bodies, bent guide plates are further arranged in the air inlet box bodies, the air inlet pipelines are located on the inner sides of the bent guide plates, and the bent guide plates comprise front guide plates located on the front sides of the air inlet pipelines and extension guide plates located on the side of the air inlet pipelines.

The invention also provides an air inlet noise reduction system which comprises an air filter and a silencing air inlet box, wherein the silencing air inlet box comprises an air inlet box body, an air inlet and an air inlet pipeline connected with the air filter are arranged on the air inlet box body, a bent guide plate is further arranged in the air inlet box body, the air inlet pipeline is positioned on the inner side of the bent guide plate, and the bent guide plate comprises a front guide plate positioned on the front side of the air inlet pipeline and an extended guide plate positioned on the side of the air inlet pipeline.

The invention has the advantages that the bent guide plate is utilized to divide the air flow entering the air inlet box into two parts, the two air flows are guided to be converged at the air inlet pipeline, and the two air flows are separated by half wavelength when being converged, so that the superposition of wave crests and wave troughs is formed at the air inlet pipeline, the air inlet noise is reduced, and the bent guide plate is only added in the air inlet box, so that the invention has the advantages of simple structure, easy arrangement, low cost and easy project push application.

To better direct the airflow, the extension baffle further included an inward flap on the rear side of the intake duct as an modification to the above-described muffling intake box and intake noise reduction system.

To better direct the air flow, as another modifications to the above-described muffling air intake box and air intake noise reduction system, the end of the flange has a connecting flange that connects to the air intake duct.

In order to shorten the longitudinal length of the silencing air inlet box and enable the volumes of the silencing air inlet box and the air inlet noise reduction system to be more compact, the silencing air inlet box and the air inlet noise reduction system are improvements, the air inlet box body comprises a top plate, a bottom plate and a circumferential side plate connected between the top plate and the bottom plate, the upper end of a bent guide plate is connected with the top plate, the lower end of the bent guide plate is connected with the bottom plate, an air inlet is formed in the circumferential side plate, an air inlet pipeline is arranged on the bottom plate, and an air inlet gap is reserved between the inlet of the air inlet pipeline and the top plate.

In order to protect the internal structure of the silencing air inlet box, improvements are made on the silencing air inlet box and the air inlet noise reduction system, and a water baffle is arranged at the front side air inlet of the front side guide plate.

Drawings

FIG. 1 is a schematic view showing the internal structure and the flow direction of a conventional air inlet box;

FIG. 2 is an external schematic view of the muffling air intake box of the present invention;

FIG. 3 is a schematic view of the internal structure and the flow direction of the muffling air intake box of the present invention;

FIG. 4 is a sound attenuation schematic of the sound attenuation inlet box of the present invention;

fig. 5 is a comparison graph of the noise reduction effect of the muffling air intake box of the present invention and a general air intake box.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in with reference to the accompanying drawings and specific embodiments.

As shown in figure 1, only a water baffle ② is arranged in the common air inlet box body, and when an engine takes air, air enters from an air inlet ①, passes through the water baffle ② and then directly reaches an air inlet pipeline ③ of the air inlet box.

With reference to fig. 2 and 3, the box body of the muffling air inlet box of the present invention comprises a top plate 1, a bottom plate 2 and a circumferential side plate 3 connected between the top plate 1 and the bottom plate 2; the air inlet 4 is arranged on the circumferential side plate 3; a water baffle 6 and a bent guide plate 7 are arranged in the box body, and the bent guide plate 7 comprises a front guide plate 7-1 positioned on the front side of the air inlet pipeline 5, an extended guide plate 7-2 positioned on the side of the air inlet pipeline 5, a turned edge 7-3 positioned on the rear side of the air inlet pipeline 5 and a connecting folded edge 7-4 connected with the air inlet pipeline 5; the upper end of the bent guide plate 7 is connected with the top plate 1, and the lower end is connected with the bottom plate 2; the air inlet pipe 5 is arranged on the bottom plate 2, and an air inlet gap is reserved between the inlet of the air inlet pipe 5 and the top plate 1.

When the engine takes air, air enters from the air inlet 4, passes through the water baffle 6 and is divided into two parts by the bent guide plate 7, air flows reach the air inlet pipeline 5 from the front side along the front side guide plate 7-1, and another air flows reach the air inlet pipeline 5 from the rear side along the extension guide plate 7-2, the turning edge 7-3 and the connecting folding edge 7-4, and the two air flows are different by half wavelength when reaching the air inlet pipeline 5 by adjusting the length of the bent guide plate 7, so that the superposition of wave crests and wave troughs is formed, and the purpose of reducing air inlet noise is achieved as shown in figure 4.

The length of the bent guide plate in the embodiment is determined according to the length of the air inlet box and the frequency of the noise to be eliminated.

In the embodiment, the bent guide plate is bodies, and in other embodiments, the bent guide plate can be formed by splicing connection.

Fig. 5 is a comparison of the noise reduction effect of the muffling air intake box of the present invention and a conventional air intake box, as shown in the figure: the abscissa represents the rotating speed of the engine, and the ordinate represents the noise generated by the air intake system when the engine is at different rotating speeds; as can be readily seen from fig. 5, the noise generated by the intake system is significantly reduced after the use of the muffling intake box.

The present invention has been described in relation to particular embodiments thereof, but the invention is not limited to the described embodiments. In the thought given by the present invention, the technical means in the above embodiments are changed, replaced, modified in a manner that is easily imaginable to those skilled in the art, and the functions are basically the same as the corresponding technical means in the present invention, and the purpose of the invention is basically the same, so that the technical scheme formed by fine tuning the above embodiments still falls into the protection scope of the present invention.