CN219344800U

CN219344800U - Silencer (muffler)

Info

Publication number: CN219344800U
Application number: CN202320346554.1U
Authority: CN
Inventors: 田玺椿; 史安安; 胡代洪; 刘建
Original assignee: Shanghai Tenneco Exhaust System Co Ltd
Current assignee: Shanghai Tenneco Exhaust System Co Ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-07-14
Anticipated expiration: 2033-02-28

Abstract

A silencer comprises a shell, a first baffle, a second baffle, an air inlet pipe, a connecting pipe, a side branch pipe connected with the connecting pipe, an air outlet pipe connected with the connecting pipe and an exhaust valve arranged on the connecting pipe. The first baffle and the second baffle divide the housing into a first cavity located on one side of the first baffle and away from the second baffle, a second cavity located between the first baffle and the second baffle, and a third cavity located on one side of the second baffle and away from the first baffle. The first baffle is provided with a plurality of first through holes communicated with the first cavity and the second cavity. The air inlet pipe is communicated with the first cavity. The bypass pipe is communicated with the second cavity. The exhaust valve is configured to be opened when the exhaust pressure is greater than a set value to be able to neutralize medium and high frequencies, thereby achieving a superior acoustic effect.

Description

Silencer (muffler)

Technical Field

The utility model relates to a silencer, and belongs to the technical field of engine exhaust systems.

Background

As vehicles are increasingly being driven to electric power, hybrid vehicle models are becoming more popular. Since the battery of the hybrid vehicle occupies a part of the volume of the chassis, the volume of the muffler is reduced accordingly. However, the idle speed and low frequency acoustic requirements of the exhaust are not reduced by the customer, and a new structure is needed to solve this problem.

Disclosure of Invention

The utility model aims to provide a silencer with excellent acoustic performance.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the silencer comprises a shell, a first baffle plate, a second baffle plate, an air inlet pipe, a connecting pipe, a side branch pipe, an air outlet pipe and an exhaust valve, wherein the first baffle plate is positioned in the shell, the second baffle plate is positioned in the shell and is arranged at intervals with the first baffle plate, the side branch pipe is connected with the connecting pipe, the air outlet pipe is connected with the connecting pipe, and the exhaust valve is arranged on the connecting pipe; the first baffle and the second baffle divide the housing into a first cavity located on one side of the first baffle and remote from the second baffle, a second cavity located between the first baffle and the second baffle, and a third cavity located on one side of the second baffle and remote from the first baffle; the first baffle is provided with a plurality of first through holes communicated with the first cavity and the second cavity; the air inlet pipe is communicated with the first cavity; the bypass pipe is communicated with the second cavity; the exhaust valve is configured to be opened when the exhaust pressure is greater than a set value.

As a further development of the utility model, the connecting pipe and the exhaust valve are located in the second chamber.

As a further improved technical solution of the present utility model, the connecting tube comprises a circumferential wall, an end wall located at one end of the circumferential wall, and an opening located at the other end of the circumferential wall opposite to the end wall; the exhaust valve includes a rotary valve cover covering the opening and capable of opening or closing the opening.

As a further improved technical scheme of the utility model, the connecting pipe is provided with an inner cavity, one end of the side branch pipe is communicated with the second cavity, and the other end of the side branch pipe is communicated with the inner cavity.

As a further improved technical scheme of the utility model, the bypass pipe is U-shaped, and most of the bypass pipe is positioned in the third cavity.

As a further improved technical solution of the present utility model, the housing includes a connection plate connecting the first baffle plate and the second baffle plate, and the air inlet pipe penetrates through the connection plate and the first baffle plate to extend into the first cavity.

As a further improved technical scheme of the utility model, the second baffle is provided with a plurality of second through holes which are communicated with the second cavity and the third cavity.

As a further improved technical scheme of the utility model, the shell comprises a first end cover and a second end cover, the first cavity is located between the first baffle plate and the first end cover, and the third cavity is located between the second baffle plate and the second end cover.

As a further improved technical scheme of the utility model, the air outlet pipe comprises a first air outlet pipe and a second air outlet pipe, wherein the first air outlet pipe penetrates through the first baffle and the first end cover, and the second air outlet pipe penetrates through the second baffle and the second end cover.

As a further improved technical solution of the present utility model, the end wall is a bottom wall, and the bottom wall closes the bottom of the internal cavity.

Compared with the prior art, the exhaust valve arranged on the connecting pipe is arranged, and when the engine of the vehicle is in a low-rotation speed and idle working condition, the exhaust valve is in a closed state, so that low-frequency noise can be effectively restrained; when the rotating speed of the engine is increased and the exhaust pressure is larger than a set value, the exhaust valve is opened to expand the volume of the cavity, and medium frequency and high frequency can be neutralized, so that a better acoustic effect is achieved.

Drawings

Fig. 1 is a schematic perspective view of a muffler of the present utility model in an illustrated embodiment, with a portion of the housing not shown.

Fig. 2 is a schematic perspective view of another angle of fig. 1.

Fig. 3 is a schematic perspective view of the further angle of fig. 1.

Fig. 4 is a front view of fig. 1.

Fig. 5 is a perspective view of the connection pipe and the exhaust valve when they are assembled together.

Fig. 6 is a schematic perspective view of another angle of fig. 5.

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the attached drawings, wherein features of the embodiments may be combined with each other without conflict if several embodiments exist. When the description refers to the accompanying drawings, the same numbers or symbols in different drawings indicate the same or similar elements unless otherwise indicated. What is described in the following exemplary embodiments does not represent all embodiments of the utility model, but rather is merely an example of a product consistent with the utility model as set forth in the claims of the utility model.

The terminology used in the present utility model is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present utility model. It should be understood that words such as "first," "second," and the like, used in the description and in the claims of the present utility model, do not denote any order, quantity, or importance, but rather are names used to distinguish one feature from another.

Referring to fig. 1 to 6, the present utility model discloses a muffler, which includes a housing, a first baffle 21 disposed in the housing, a second baffle 22 disposed in the housing and spaced apart from the first baffle 21, an intake pipe 3, a connection pipe 4, a bypass pipe 5 connected to the connection pipe 4, an outlet pipe 6 connected to the connection pipe 4, and an exhaust valve 7 mounted on the connection pipe 4.

The housing includes a shell (not shown) surrounding the outside, a first end cap 11, the second end cap 12, and a connection plate 13 connecting the first barrier 21 and the second barrier 22.

The first baffle 21 and the second baffle 22 divide the housing into a first cavity 101 located on one side of the first baffle 21 and remote from the second baffle 22, a second cavity 102 located between the first baffle 21 and the second baffle 22, and a third cavity 103 located on one side of the second baffle 22 and remote from the first baffle 21. The first cavity 101 is located between the first baffle 21 and the first end cap 11, and the third cavity 103 is located between the second baffle 22 and the second end cap 12.

The first baffle 21 is provided with a plurality of first through holes 210 communicating the first cavity 101 and the second cavity 102. The second baffle 22 is provided with a plurality of second through holes 220 for communicating the second cavity 102 with the third cavity 103.

The intake pipe 3 passes through the connection plate 13 and the first baffle 21 to extend into the first chamber 101.

The connection tube 4 comprises a circumferential wall 41, an end wall 42 at one end of the circumferential wall 41, and an opening at the other end of the circumferential wall 41 opposite to the end wall 42. The connecting tube 41 is provided with an internal cavity 40. In the illustrated embodiment of the utility model, the end wall 42 is a bottom wall that closes the bottom of the internal cavity 40.

The connection pipe 4 and the exhaust valve 7 are located in the second chamber 102. The exhaust valve 7 is configured to be opened when the exhaust pressure is greater than a set value. Specifically, the exhaust valve 7 includes a rotary valve cover 71 that covers the opening and is capable of opening or closing the opening.

The bypass duct 5 communicates with the second chamber 102. Specifically, in the illustrated embodiment of the present utility model, the bypass pipe 5 is U-shaped, and a substantial portion of the bypass pipe 5 is located in the third cavity 103. One end of the bypass pipe 5 is communicated with the second cavity 102, and the other end of the bypass pipe 5 is communicated with the inner cavity 40.

In the illustrated embodiment of the utility model, the outlet duct 6 comprises a first outlet duct 61 and a second outlet duct 62, wherein the first outlet duct 61 extends through the first baffle 21 and the first end cap 11 and the second outlet duct 62 extends through the second baffle 22 and the second end cap 12.

The exhaust valve 7 is in a closed state when the engine of the vehicle is in a low rotational speed and idle condition. At this time, the exhaust gas that enters the first chamber 101 from the intake pipe 3 passes through the first through hole 210 to enter the second chamber 102; then, the exhaust gas flows into the inner cavity 40 of the connection pipe 4 through the bypass pipe 5; finally, exhaust gas flows out from the first air outlet pipe 61 and the second air outlet pipe 62; by this arrangement, low-frequency noise can be effectively suppressed.

When the rotational speed of the engine increases and the exhaust pressure is greater than the set value, the exhaust valve 7 is opened to function as a volume expansion chamber. At this time, the inner cavity 40 of the connecting pipe 4 is communicated with the second cavity 102, so that the intermediate frequency and the high frequency can be neutralized, and a better acoustic effect is achieved.

The above embodiments are only for illustrating the present utility model and not for limiting the technical solutions described in the present utility model, and it should be understood that the present utility model should be based on those skilled in the art, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the present utility model without departing from the spirit and scope of the present utility model and modifications thereof should be covered by the scope of the claims of the present utility model.

Claims

1. The silencer is characterized by comprising a shell, a first baffle plate, a second baffle plate, an air inlet pipe, a connecting pipe, a side branch pipe, an air outlet pipe and an exhaust valve, wherein the first baffle plate is positioned in the shell, the second baffle plate is positioned in the shell and is arranged at intervals with the first baffle plate, the side branch pipe is connected with the connecting pipe, the air outlet pipe is connected with the connecting pipe, and the exhaust valve is arranged on the connecting pipe; the first baffle and the second baffle divide the housing into a first cavity located on one side of the first baffle and remote from the second baffle, a second cavity located between the first baffle and the second baffle, and a third cavity located on one side of the second baffle and remote from the first baffle; the first baffle is provided with a plurality of first through holes communicated with the first cavity and the second cavity; the air inlet pipe is communicated with the first cavity; the bypass pipe is communicated with the second cavity; the exhaust valve is configured to be opened when the exhaust pressure is greater than a set value.

2. The muffler of claim 1, wherein: the connecting pipe and the exhaust valve are located in the second cavity.

3. The muffler of claim 1, wherein: the connecting tube includes a circumferential wall, an end wall at one end of the circumferential wall, and an opening at the other end of the circumferential wall opposite the end wall; the exhaust valve includes a rotary valve cover covering the opening and capable of opening or closing the opening.

4. The muffler of claim 3, wherein: the connecting pipe is provided with an internal cavity, one end of the side branch pipe is communicated with the second cavity, and the other end of the side branch pipe is communicated with the internal cavity.

5. The muffler of claim 4, wherein: the bypass pipe is U-shaped, and most of the bypass pipe is located in the third cavity.

6. The muffler of claim 1, wherein: the housing includes a connection plate connecting the first baffle and the second baffle, and the air inlet pipe passes through the connection plate and the first baffle to extend into the first cavity.

7. The muffler of claim 1, wherein: the second baffle is provided with a plurality of second through holes which are communicated with the second cavity and the third cavity.

8. The muffler of claim 1, wherein: the housing includes a first end cap and a second end cap, the first cavity is located between the first baffle and the first end cap, and the third cavity is located between the second baffle and the second end cap.

9. The muffler of claim 8, wherein: the air outlet pipe comprises a first air outlet pipe and a second air outlet pipe, wherein the first air outlet pipe penetrates through the first baffle and the first end cover, and the second air outlet pipe penetrates through the second baffle and the second end cover.

10. The muffler of claim 4, wherein: the end wall is a bottom wall that closes the bottom of the internal cavity.