CN218669523U

CN218669523U - Exhaust muffler

Info

Publication number: CN218669523U
Application number: CN202223268960.5U
Authority: CN
Inventors: 田玺椿; 周帅利; 李刚
Original assignee: Shanghai Tenneco Exhaust System Co Ltd
Current assignee: Shanghai Tenneco Exhaust System Co Ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-03-21
Anticipated expiration: 2032-12-06

Abstract

An exhaust muffler includes a housing, a plurality of baffles within the housing, and a core assembly mounted in the housing. The housing includes a first cavity. The core body assembly comprises an air inlet pipe, a first air outlet pipe, a second air outlet pipe, a first side branch pipe connected with the first air outlet pipe and a second side branch pipe connected with the second air outlet pipe, and the air inlet pipe is communicated with the first cavity; one end of the first side branch pipe is communicated with the first cavity; one end of the second side branch pipe is communicated with the first cavity; the first air outlet pipe comprises a first end part and a first air outlet opposite to the first end part; the second air outlet pipe comprises a second end part and a second air outlet opposite to the second end part; the exhaust muffler further includes a first valve element mounted at the first end portion and a second valve element mounted at the second end portion, the first valve element and the second valve element having different opening pressures.

Description

Exhaust muffler

Technical Field

The utility model relates to an exhaust muffler belongs to engine exhaust system technical field.

Background

Aiming at a large-displacement engine, in the running process of a vehicle, the noise of a tail pipe opening is too large, subjective evaluation is not acceptable, noise reduction is realized by adding silencing cotton and a pipe in a silencer, but the exhaust back pressure is increased, and the power performance of the whole vehicle can be reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an exhaust muffler with multiple mode of regulation.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an exhaust muffler comprising a housing, a plurality of baffles within the housing, and a core assembly mounted in the housing; the housing includes an interior cavity; the plurality of baffles comprise a first baffle and a second baffle, the first baffle and the second baffle are arranged at intervals, and the first baffle and the second baffle divide the inner cavity into a first cavity which is positioned on one side of the first baffle and is far away from the second baffle, a second cavity which is positioned on one side of the second baffle and is far away from the first baffle, and a third cavity which is positioned between the first baffle and the second baffle; the core body assembly comprises an air inlet pipe, a first air outlet pipe, a second air outlet pipe, a first side branch pipe connected with the first air outlet pipe and a second side branch pipe connected with the second air outlet pipe, and the air inlet pipe penetrates through the first baffle plate and the second baffle plate to be communicated with the first cavity; one end of the first side branch pipe is communicated with the first cavity; one end of the second side branch pipe is communicated with the first cavity; the first air outlet pipe comprises a first end part and a first air outlet opposite to the first end part; the second air outlet pipe comprises a second end part and a second air outlet opposite to the second end part; the exhaust muffler further includes a first valve element mounted at the first end portion and a second valve element mounted at the second end portion, the first valve element and the second valve element having different opening pressures.

As a further improved technical solution of the present invention, the first side pipe runs through the first baffle and the second baffle, the first valve is located in the second cavity.

As a further improved technical solution of the present invention, the second side branch pipe runs through the first baffle plate and the second baffle plate, and the second valve member is located in the second cavity.

As a further improved technical scheme of the utility model, first baffle is the sclausura baffle, first cavity is the resonant cavity.

As the utility model discloses further modified technical scheme, the second baffle is the trompil baffle, the second baffle is including the intercommunication the second cavity with a plurality of trompils of third cavity.

As a further improved technical solution of the present invention, the intake pipe includes a first pipe section, a second pipe section and a third pipe section, wherein the first pipe section is located in the second cavity, and the first pipe section is provided with a plurality of first through holes communicated with the second cavity.

As a further improved technical solution of the present invention, the second pipe section is located in the third cavity, the second pipe section is provided with a plurality of second perforations communicating with the third cavity.

As a further improved technical solution of the present invention, the third pipe section extends into the first cavity; the air inlet pipe further comprises a cone connecting the second pipe section and the third pipe section, the cone is located in the third cavity, and the diameter of the third pipe section is smaller than that of the second pipe section.

As a further improved technical scheme of the utility model, the diameter of first pipeline section is the same with the diameter of second pipeline section.

As a further improved technical solution of the present invention, the opening pressure of the first valve is smaller than the opening pressure of the second valve;

at a first exhaust pressure, neither the first valve element nor the second valve element is open;

at a second exhaust pressure, the first valve element is open and the second valve element is not open;

at a third exhaust pressure, both the first valve element and the second valve element are open;

wherein the first exhaust pressure is less than the second exhaust pressure, which is less than the third exhaust pressure.

Compared with the prior art, the exhaust silencer of the present invention comprises a first valve element mounted at the first end and a second valve element mounted at the second end, wherein the opening pressures of the first valve element and the second valve element are different; according to the arrangement, the first valve part and the second valve part can be closed completely, opened completely or opened one by one, so that the exhaust silencer has multiple adjusting modes to reduce exhaust noise under multiple conditions.

Drawings

Fig. 1 is a partially exploded perspective view of an exhaust muffler according to an embodiment of the present invention.

Fig. 2 is a perspective view of the housing of fig. 1 removed.

Fig. 3 is a top view of fig. 2.

Detailed Description

The present invention will be described in detail with reference to the drawings, wherein if there are several embodiments, the features of these embodiments can be combined with each other without conflict. When the description refers to the accompanying drawings, the same numbers or symbols in different drawings represent the same or similar elements unless otherwise specified. The matters described in the following exemplary embodiments do not represent all embodiments of the present invention, but rather they are merely examples of products consistent with the present invention as recited in the claims of the present invention.

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

Referring to fig. 1 to 3, the present invention discloses an exhaust muffler 100, which includes a housing 1, a plurality of baffles 2 located in the housing 1, and a core assembly 3 installed in the housing 1.

The housing 1 comprises an inner cavity 10. In the illustrated embodiment of the present invention, the housing 1 includes an upper housing 11 and a lower housing 12, and the inner cavity 10 is enclosed by the upper housing 11 and the lower housing 12.

The plurality of baffle plates 2 comprise a first baffle plate 21 and a second baffle plate 22, the first baffle plate 21 and the second baffle plate 22 are arranged at intervals, the first baffle plate 21 and the second baffle plate 22 divide the inner cavity 10 into a first cavity 101, a second cavity 102 and a third cavity 103, wherein the first cavity 101 is located on one side of the first baffle plate 21 and is far away from the second baffle plate 22, the second cavity 102 is located on one side of the second baffle plate 22 and is far away from the first baffle plate 21, and the third cavity 103 is located between the first baffle plate 21 and the second baffle plate 22.

The core body component 3 comprises an air inlet pipe 4, a first air outlet pipe 51, a second air outlet pipe 52, a first side branch pipe 61 connected with the first air outlet pipe 51 and a second side branch pipe 62 connected with the second air outlet pipe 52.

The air inlet pipe 4 penetrates through the first baffle 21 and the second baffle 22 to communicate with the first cavity 101.

One end of the first bypass pipe 61 is communicated with the first chamber 101. One end of the second bypass pipe 62 is communicated with the first chamber 101.

The first outlet pipe 51 includes a first end 511 and a first outlet 512 opposite to the first end 511. The second outlet pipe 52 includes a second end 521 and a second outlet 522 opposite to the second end 521.

The exhaust muffler 100 further includes a first valve element 71 mounted at the first end portion 511 and a second valve element 72 mounted at the second end portion 521, and the first valve element 71 and the second valve element 72 have different cracking pressures.

In the illustrated embodiment of the present invention, the first bypass pipe 61 penetrates the first baffle 21 and the second baffle 22, and the first valve 71 is located in the second cavity 102. Similarly, the second bypass pipe 62 extends through the first baffle 21 and the second baffle 22, and the second valve member 72 is located in the second cavity 102.

The first baffle 21 is a non-porous baffle, that is, the first baffle 21 is not provided with any opening for communicating the first cavity 101 with the third cavity 103. The first cavity 101 is a resonant cavity.

The second baffle 22 is an opening baffle, and the second baffle 22 includes a plurality of openings 221 communicating the second cavity 102 and the third cavity 103.

The inlet pipe 4 comprises a first pipe section 41, a second pipe section 42, a third pipe section 43, and a cone 44 connecting the second pipe section 42 and the third pipe section 43. The first pipe section 41 is located in the second cavity 102, and the first pipe section 41 is provided with a plurality of first through holes 411 communicated with the second cavity 102. The second pipe section 42 is located in the third cavity 103, and the second pipe section 42 is provided with a plurality of second through holes 421 communicated with the third cavity 103. The third tube section 43 extends into the first cavity 101, the cone 44 is located in the third cavity 103, and the diameter of the third tube section 43 is smaller than the diameter of the second tube section 42. The diameter of the first pipe section 41 is the same as the diameter of the second pipe section 42.

In an embodiment of the present invention, the opening pressure of the first valve element 71 is smaller than the opening pressure of the second valve element 72. The first valve element 71 and the second valve element 72 are both exhaust passive valves.

At a first exhaust pressure (e.g., when the engine is at a low speed), neither the first valve element 71 nor the second valve element 72 is open, and the exhaust muffler 100 may dissipate vibrations at a certain frequency in the main system; at this time, the exhaust gas flows out from the first outlet pipe 51 and the second outlet pipe 52, the exhaust noise is optimal, and the noise requirement of low rotating speed is met.

At a second exhaust pressure (e.g., when engine speed increases), the first valve element 71 is open and the second valve element 72 is not open; at this time, a part of the exhaust gas flows out from the second outlet pipe 52; another portion of the exhaust gas flows from the opened first valve member 71 into the second cavity 102 and through the opening 221 into the third cavity 103. At this time, an expansion cavity is formed between the second outlet pipe 52 and the interior of the muffler 100, and exhaust gas is discharged from the second outlet pipe 52, so that the requirements for exhaust and pressure relief are met, and the acoustic noise effect can be considered.

At the third exhaust pressure (when the engine speed is raised again), both the first valve element 71 and the second valve element 72 are open; at this time, a part of the exhaust gas flows out from the first outlet pipe 51 and the second outlet pipe 52; another part of the exhaust gas flows into the second cavity 102 from the opened first valve element 71 and the opened second valve element 72, and flows into the third cavity 103 through the opening 221. At this time, the pressure relief is maximized, the exhaust resistance of the engine is minimized, and the power of the engine is maximized.

The first exhaust pressure is less than the second exhaust pressure, which is less than the third exhaust pressure.

Compared with the prior art, the exhaust muffler 100 of the present invention includes the first valve element 71 installed at the first end 511 and the second valve element 72 installed at the second end 521, and the opening pressures of the first valve element 71 and the second valve element 72 are different; so configured, the first valve member 71 and the second valve member 72 can be closed all together, opened all together or opened one by one, so that the exhaust muffler 100 has various adjustment modes to reduce exhaust noise under various conditions.

The utility model discloses an increase exhaust passive valve exhaust silencer 100 guarantees to solve whole car low-speed exhaust noise under the unchangeable condition of volume, and exhaust passive valve opens in the high rotational speed of engine simultaneously, reduces exhaust backpressure, reduces the consumption of power, promotes the engine performance. The exhaust passive valves are opened to release pressure at different rotating speeds of the engine, so that the acoustic performance is met, and meanwhile, the power requirement of the engine is met.

The above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the understanding of the present specification should be based on the technical personnel in the technical field, and although the present specification has described the present invention in detail with reference to the above embodiments, the skilled personnel in the art should understand that the technical personnel in the technical field can still modify or substitute the present invention, and all the technical solutions and modifications thereof that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. An exhaust muffler comprising a housing, a plurality of baffles positioned within the housing, and a core assembly mounted in the housing; the housing includes an interior cavity; the plurality of baffles comprise a first baffle and a second baffle, the first baffle and the second baffle are arranged at intervals, and the first baffle and the second baffle divide the inner cavity into a first cavity which is positioned on one side of the first baffle and is far away from the second baffle, a second cavity which is positioned on one side of the second baffle and is far away from the first baffle, and a third cavity which is positioned between the first baffle and the second baffle; the core body assembly comprises an air inlet pipe, a first air outlet pipe, a second air outlet pipe, a first side branch pipe connected with the first air outlet pipe and a second side branch pipe connected with the second air outlet pipe, and the air inlet pipe penetrates through the first baffle plate and the second baffle plate to be communicated with the first cavity; one end of the first side branch pipe is communicated with the first cavity; one end of the second side branch pipe is communicated with the first cavity; the first air outlet pipe comprises a first end part and a first air outlet opposite to the first end part; the second air outlet pipe comprises a second end part and a second air outlet opposite to the second end part; the exhaust muffler further includes a first valve element mounted at the first end portion and a second valve element mounted at the second end portion, the first valve element and the second valve element having different opening pressures.

2. The exhaust muffler of claim 1, wherein: the first bypass pipe penetrates through the first baffle and the second baffle, and the first valve is located in the second cavity.

3. The exhaust muffler of claim 1, wherein: the second bypass pipe penetrates through the first baffle and the second baffle, and the second valve element is located in the second cavity.

4. The exhaust muffler of claim 1, wherein: the first baffle is a nonporous baffle, and the first cavity is a resonant cavity.

5. The exhaust muffler of claim 1, wherein: the second baffle is an opening baffle, and the second baffle comprises a plurality of openings communicated with the second cavity and the third cavity.

6. The exhaust muffler of claim 1, wherein: the air inlet pipe comprises a first pipe section, a second pipe section and a third pipe section, wherein the first pipe section is located in the second cavity, and the first pipe section is provided with a plurality of first through holes communicated with the second cavity.

7. The exhaust muffler of claim 6, wherein: the second pipe section is positioned in the third cavity and is provided with a plurality of second through holes communicated with the third cavity.

8. The exhaust muffler of claim 7, wherein: the third pipe section extends into the first cavity; the air inlet pipe further comprises a cone connecting the second pipe section and the third pipe section, the cone is located in the third cavity, and the diameter of the third pipe section is smaller than that of the second pipe section.

9. The exhaust muffler of claim 8, wherein: the diameter of the first pipe section is the same as the diameter of the second pipe section.

10. The exhaust muffler according to any one of claims 1 to 9, wherein: the cracking pressure of the first valve element is smaller than that of the second valve element;