Automobile exhaust silencer

Abstract

The utility model discloses an automobile exhaust silencer, which relates to the technical field of automobile accessories, and is characterized by comprising a shell, an air inlet pipeline and an air outlet pipeline, a first partition plate, a second partition plate, a third partition plate and a fourth partition plate are fixedly mounted in the shell, a Helmholtz cavity is formed between the first partition plate and the shell, and the air inlet pipeline is communicated with the air outlet pipeline. A first noise reduction cavity is formed between the first partition plate and the second partition plate, a second noise reduction cavity is formed between the second partition plate and the third partition plate, a third noise reduction cavity is formed between the fourth partition plate and the shell, and a partition cavity is formed between the third partition plate and the fourth partition plate; the second connecting pipe is communicated with the first noise reduction cavity and the third noise reduction cavity, and the first connecting pipe is communicated with the second noise reduction cavity and the third noise reduction cavity; one end of the first air supply pipe is communicated with the first noise reduction cavity, and one end of the second air supply pipe is communicated with the second noise reduction cavity; and one end of the air outlet pipeline communicates with the third noise reduction cavity, and the noise reduction effect on noise is better.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to an automotive exhaust muffler. Background Technology

[0002] The automotive muffler is an important component of the automotive exhaust system, mainly used to reduce the noise generated by the engine of a motor vehicle. Nowadays, people have increasingly higher requirements for the overall comfort of the vehicle, and therefore the performance requirements of automotive mufflers in various aspects are becoming more and more stringent, such as noise control. As a major component of a car, the muffler plays a key role in noise control, and improving the noise reduction capability of the automotive muffler is also an important aspect of improving the overall comfort of the vehicle. Therefore, this utility model provides an automotive exhaust muffler. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides an automotive exhaust muffler with better noise reduction effect.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automotive exhaust muffler, comprising a housing, an intake pipe, and an exhaust pipe, wherein the intake pipe is fixedly installed at one end of the housing, and the exhaust pipe is fixedly installed at the other end of the housing; a first partition, a second partition, a third partition, and a fourth partition are fixedly installed inside the housing, wherein:

[0005] A Helmholtz chamber is formed between one side of the first partition and the inner surface of the outer shell; a first noise reduction cavity is formed between the first partition and the second partition; a second noise reduction cavity is formed between the second partition and the third partition; a third noise reduction cavity is formed between the fourth partition and the outer shell; and a partition cavity is formed between the third partition and the fourth partition.

[0006] A second connecting pipe is fixedly installed between the second partition and the fourth partition, and the second connecting pipe connects the first noise reduction cavity and the third noise reduction cavity. A first connecting pipe is fixedly installed between the third partition and the fourth partition, and the first connecting pipe connects the second noise reduction cavity and the third noise reduction cavity.

[0007] A first air supply pipe and a second air supply pipe are fixedly installed on one end of the air intake pipe. Both the first air supply pipe and the second air supply pipe are fixedly connected to the inside of the outer shell. One end of the first air supply pipe is connected to the first noise reduction cavity, and one end of the second air supply pipe is connected to the second noise reduction cavity.

[0008] One end of the air outlet pipe passes through the Helmholtz chamber, the first noise reduction chamber, the second noise reduction chamber, and the isolation chamber, and the other end of the air outlet pipe is connected to the third noise reduction chamber.

[0009] Preferably, a liquid storage box is fixedly installed on one end of the outer shell, and the air inlet pipe, the first air supply pipe and a portion of the second air supply pipe are all located inside the liquid storage box.

[0010] Beneficial effects

[0011] Compared with the prior art, the present invention provides an automotive exhaust muffler with the following advantages:

[0012] By fixing a first partition, a second partition, a third partition, and a fourth partition inside the outer shell, a Helmholtz chamber is formed between the first partition and the outer shell, a first noise reduction chamber is formed between the first and second partitions, a second noise reduction chamber is formed between the second and third partitions, a third noise reduction chamber is formed between the fourth partition and the outer shell, and a partition chamber is formed between the third and fourth partitions. A second connecting pipe connects the first and third noise reduction chambers, and a first connecting pipe connects the second and third noise reduction chambers. A first air supply pipe and a second air supply pipe are fixedly installed on one end of the air intake pipe. One end of the first air supply pipe is connected to the first noise reduction chamber, and the second air supply pipe is connected to the second noise reduction chamber. One end of the air outlet pipe is connected to the third noise reduction chamber. The exhaust gas transported by the air intake pipe is dispersed to the first and second noise reduction chambers for treatment and then converges in the third noise reduction chamber, resulting in a better noise reduction effect on the exhaust gas.

[0013] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the air inlet pipe, the first air delivery pipe, the second air delivery pipe, and the liquid storage box in this utility model.

[0018] In the diagram: 1. Outer shell; 2. Inlet pipe; 3. Outlet pipe; 4. First partition; 5. Second partition; 6. Third partition; 7. Fourth partition; 8. Helmholtz chamber; 9. First air supply pipe; 10. Second air supply pipe; 11. First connecting pipe; 12. Second connecting pipe; 13. Liquid storage box. Detailed Implementation

[0019] The following is in conjunction with the appendix Figures 1 to 3 The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0020] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] Please combine Figures 1 to 3 As shown, this utility model provides an automotive exhaust muffler, which includes a housing 1, an intake pipe 2, and an exhaust pipe 3. The intake pipe 2 is fixedly installed at one end of the housing 1, and the exhaust pipe 3 is fixedly installed at the other end of the housing 1. A first partition 4, a second partition 5, a third partition 6, and a fourth partition 7 are fixedly installed inside the housing 1.

[0023] A Helmholtz chamber 8 is formed between one side of the first partition 4 and the inner surface of the outer shell 1. A first noise reduction chamber is formed between the first partition 4 and the second partition 5. A second noise reduction chamber is formed between the second partition 5 and the third partition 6. A third noise reduction chamber is formed between the fourth partition 7 and the outer shell 1. A partition chamber is formed between the third partition 6 and the fourth partition 7.

[0024] A second connecting pipe 12 is fixedly installed between the second partition 5 and the fourth partition 7. The second connecting pipe 12 connects the first noise reduction cavity and the third noise reduction cavity. A first connecting pipe 11 is fixedly installed between the third partition 6 and the fourth partition 7. The first connecting pipe 11 connects the second noise reduction cavity and the third noise reduction cavity.

[0025] A first air supply pipe 9 and a second air supply pipe 10 are fixedly installed on one end of the air intake pipe 2. Both the first air supply pipe 9 and the second air supply pipe 10 are fixedly connected to the inside of the outer shell 1. One end of the first air supply pipe 9 is connected to the first noise reduction cavity, and one end of the second air supply pipe 10 is connected to the second noise reduction cavity.

[0026] The intake pipe 2 receives the exhaust gas discharged from the catalytic converter and disperses it into the first air supply pipe 9 and the second air supply pipe 10. The first air supply pipe 9 delivers a portion of the exhaust gas to the first noise reduction chamber, and the second air supply pipe 10 delivers a portion of the exhaust gas to the second noise reduction chamber. The exhaust gas in the first noise reduction chamber collides with the first baffle 4 and the second baffle 5, forming sound waves opposite to the noise waves in the exhaust gas, thus completing noise reduction. The exhaust gas in the exhaust gas collides with the second baffle 5 and the third baffle 6 and forms a sound wave opposite to the noise wave in the exhaust gas, thus completing the noise reduction. The first noise reduction chamber and the second noise reduction chamber respectively reduce the noise of the exhaust gas transported by the intake pipe 2, and the noise reduction effect is better. After the noise in the exhaust gas has been treated once, the exhaust gas in the first noise reduction chamber enters the third noise reduction chamber through the second connecting pipe 12, and the exhaust gas in the second noise reduction chamber also enters the third noise reduction chamber through the first connecting pipe 11, and continues to reduce noise in the third noise reduction chamber.

[0027] One end of the exhaust pipe 3 passes through the Helmholtz chamber 8, the first noise reduction chamber, the second noise reduction chamber, and the partition chamber, and the other end of the exhaust pipe 3 is connected to the third noise reduction chamber. The exhaust gas entering the third noise reduction chamber will move towards the middle of the third noise reduction chamber. The exhaust gas entering the third noise reduction chamber through the first connecting pipe 11 moves in the opposite direction to the exhaust gas entering the third noise reduction chamber through the second connecting pipe 12. Finally, they will enter the exhaust pipe 3 together. The exhaust gas also has the effect of reducing noise after meeting, further improving the noise reduction effect of the exhaust gas.

[0028] A liquid storage box 13 is fixedly installed on one end of the outer casing 1. Parts of the air inlet pipe 2, the first air supply pipe 9, and the second air supply pipe 10 are located inside the liquid storage box 13. The inside of the liquid storage box 13 is used to store coolant, which can be water. It can absorb the heat in the exhaust gas and reduce the damage of the heat in the exhaust gas to the outer casing 1.

[0029] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. An automotive exhaust muffler, comprising a housing (1), an intake pipe (2), and an exhaust pipe (3), wherein, The air intake pipe (2) is fixedly installed at one end of the outer shell (1), and the air outlet pipe (3) is fixedly installed at the other end of the outer shell (1). The outer shell (1) is characterized by having a first partition (4), a second partition (5), a third partition (6), and a fourth partition (7) fixedly installed inside, wherein: A Helmholtz chamber (8) is formed between one side of the first partition (4) and the inner surface of the outer shell (1), a first noise reduction cavity is formed between the first partition (4) and the second partition (5), a second noise reduction cavity is formed between the second partition (5) and the third partition (6), a third noise reduction cavity is formed between the fourth partition (7) and the outer shell (1), and a partition cavity is formed between the third partition (6) and the fourth partition (7). A second connecting pipe (12) is fixedly installed between the second partition (5) and the fourth partition (7). The second connecting pipe (12) connects the first noise reduction cavity and the third noise reduction cavity. A first connecting pipe (11) is fixedly installed between the third partition (6) and the fourth partition (7). The first connecting pipe (11) connects the second noise reduction cavity and the third noise reduction cavity. A first air supply pipe (9) and a second air supply pipe (10) are fixedly installed on one end of the air intake pipe (2). The first air supply pipe (9) and the second air supply pipe (10) are both fixedly connected to the inside of the outer shell (1). One end of the first air supply pipe (9) is connected to the first noise reduction cavity, and one end of the second air supply pipe (10) is connected to the second noise reduction cavity. One end of the air outlet pipe (3) passes through the Helmholtz chamber (8), the first noise reduction chamber, the second noise reduction chamber and the isolation chamber, and one end of the air outlet pipe (3) is connected to the third noise reduction chamber.

2. The automotive exhaust muffler according to claim 1, characterized in that: A liquid storage box (13) is fixedly installed on one end of the outer shell (1), and the air inlet pipe (2), the first air supply pipe (9) and the second air supply pipe (10) are located inside the liquid storage box (13).

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