KR20220137559A - Muffler for a vehicle having high sound difference in high speed and low speed - Google Patents

Abstract

Disclosed is a muffler for a vehicle having a high sound difference between a high speed and a low speed. The muffler for a vehicle comprises: a first barrier rib, a second barrier rib, and a third barrier rib consecutively arranged; a low speed induction pipe formed from an outer side of the third barrier rib to penetrate the third barrier rib and the second barrier rib and formed to a portion between the first barrier rib and the second barrier rib; a high speed induction pipe apart from the low speed induction pipe and formed from an outer side of the third barrier rib and penetrating the third barrier rib, the second barrier rib, and the first barrier rib; and a torque control unit. Moreover, an expansion chamber is formed between the second barrier rib and the third barrier rib. A sound absorption chamber is formed between the first barrier rib and the second barrier rib. The torque control unit is formed in the expansion chamber and connected to the high speed induction pipe. A torque differs depending on the width or length of the torque control unit. Exhaust gas is inputted into one middle end of the high speed induction pipe penetrating the first barrier rib. The inputted exhaust gas is discharged through the other middle end of the high speed induction pipe or through the low speed induction pipe.

Description

Silencer for vehicles with large sound deviation at high and low speeds

The present invention relates to a silencer for a vehicle having a large sound deviation between high and low speeds.

As shown in FIG. 1, the conventional silencer generates sound of the same tone at low speed and high speed with a partition wall, perforation and guide pipe configuration.

US 10-2021-0064664 A

An object of the present invention is to provide a silencer for a vehicle having a large sound deviation at high and low speeds.

In order to achieve the above object, a silencer for a vehicle according to an embodiment of the present invention includes a first partition wall, a second partition wall, and a third partition wall arranged in sequence; a low-speed guide pipe formed from the outside of the third bulkhead through the third and second bulkheads to between the first and second bulkheads; a high-speed guide pipe spaced apart from the low-speed guide pipe and formed through the third partition wall, the second partition wall, and the first partition wall from the outside of the third partition wall; and a torque control unit. Here, an expansion chamber is formed between the second partition wall and the third partition wall, a sound absorption chamber is formed between the first partition wall and the second partition wall, and the torque control unit is disposed in the high-speed guide tube in the expansion chamber. is connected, the torque varies according to the width or length of the torque controller, the exhaust gas is inputted to one end of the high-speed guide pipe passing through the first bulkhead, and the inputted exhaust gas is the high-speed guide pipe It is discharged through the other end or the low-speed guide pipe.

A silencer for a vehicle according to another embodiment of the present invention includes: a first bulkhead, a second bulkhead, a fourth bulkhead, and a third bulkhead sequentially arranged; a first low-speed guide pipe formed from the outside of the first partition wall through the first partition wall and the second partition wall to between the second partition wall and the fourth partition wall; a first high-speed guide pipe spaced apart from the first low-speed guide pipe and formed from the outside of the first partition wall to the first partition wall through the first partition wall and between the first partition wall and the second partition wall; a second low-speed guide pipe formed from the outside of the third bulkhead through the third and fourth bulkheads to a space between the second bulkhead and the fourth bulkhead; a second high-speed guide pipe spaced apart from the second low-speed guide pipe and formed from the outside of the third partition wall to the third partition wall through the third partition wall and between the third partition wall and the fourth partition wall; and a first torque control unit and a second torque control unit. Here, the first low speed guide tube, the first high speed guide tube, and the first torque control unit form a first sub silencer, and the second low speed guide tube, the second high speed guide tube and the second torque bearer part a second sub silencer is formed, a first expansion chamber is formed between the first partition wall and the second partition wall, a second expansion chamber is formed between the third partition wall and the fourth partition wall, and the second partition wall and a sound absorbing chamber is formed between the fourth partition wall, the first sub silencer and the second sub silencer share the sound absorbing chamber, and the first torque control unit is configured to include the first high-speed guide pipe in the first expansion chamber. is connected to, and the second torque control unit is connected to the second high-speed guide tube in the second expansion chamber, and the torque varies according to the width or length of the first torque control unit or the second torque control unit. It changes.

The silencer for a vehicle according to the present invention has a structure capable of reducing the weight while having a large sound deviation at high and low speeds, and can excel in sports sound generation.

1 is a view showing a conventional vehicle silencer.
2 to 4 are views showing the structure of a silencer for a vehicle according to the first embodiment of the present invention.
5 to 7 are views showing the structure of a silencer for a vehicle according to a second embodiment of the present invention.
8 to 17 are views showing the structure of a silencer for a vehicle according to a third embodiment of the present invention.

As used herein, the singular expression includes the plural expression unless the context clearly dictates otherwise. In this specification, terms such as “consisting of” or “comprising” should not be construed as necessarily including all of the various components or various steps described in the specification, some of which components or some steps are It should be construed that it may not include, or may further include additional components or steps. In addition, terms such as "...unit" and "module" described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software. .

The present invention relates to a silencer, and may have a structure capable of reducing weight while increasing sound deviation at high and low speeds.

According to one embodiment, the silencer has a complex structure in which the room is bisected into an expansion chamber and a sound absorption chamber, and the frequency of the high-speed guide tube through which the exhaust gas flows rapidly and the frequency of the low-speed guide tube that flows through the sound absorption chamber may be different . As a result, it may be possible to realize excellent sports sound.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 to 4 are views showing the structure of a silencer for a vehicle according to the first embodiment of the present invention.

2 to 4 , the silencer for a vehicle according to the present embodiment includes a case 100 and at least a portion of the low-speed guide pipe 202, the high-speed guide pipe 204, the valve 206, and the torque included in the case 100. It may include a control unit 208 and partition walls 200 , 220 and 222 .

According to an embodiment, the expansion chamber 230 is formed between the second partition wall 220 and the third partition wall 222 , and the sound absorption chamber 232 is formed between the first partition wall 200 and the second partition wall 220 . can be formed. Although not shown above, the sound absorbing chamber 232 is filled with a sound absorbing material. As a result, the exhaust gas input to the low speed guide pipe 202 is discharged through the through holes and then sucked back into the low speed guide pipe 202 , and in this process, noise due to the exhaust gas can be reduced due to the sound absorbing material.

The low-speed guide tube 202 may be arranged to penetrate through the sequentially arranged third and second partition walls 222 and 220 . In particular, apertures may be formed in certain portions 210 and 214 of the low velocity guide tube 202 within the sound absorption chamber 232 . Here, the specific parts 210 and 214 may be arranged side by side as shown in FIGS. 3 and 4 , and may be connected through the part 212 having a 'U' shape. In this case, the low-speed guide pipe 202 may be covered with a sound absorbing material between the second partition wall 220 and the first partition wall 200 .

According to one embodiment, the end portion of the specific portion 214 of the low-speed guide tube 202 passes through the second partition wall 220 as shown in FIG. 3 , in a space between the partition walls 220 and 222 , that is, It may be arranged within the expansion chamber 230 . As a result, the exhaust gas output from the high-speed guide tube 204 through the torque control unit 208 can be input to the low-speed guide tube 202 .

The first bulkhead 200 is a position where exhaust gas is input from the engine (not shown), and in detail, one end of the high-speed guide pipe 204 passes through the first bulkhead 200 to the outside of the case 100 . may be exposed. As a result, the exhaust gas output from the engine can be input to the high-speed guide pipe 204 .

According to an embodiment, a portion of the first partition wall 200 may be bent, and the high-speed guide tube 204 may be inserted into the bent portion. In this case, the end of the high-speed guide tube 204 may also be bent according to the bent portion.

The high speed guide tube 204 is arranged side by side with the low speed guide tube 204 , and may have a larger size than the low speed guide tube 204 .

The high-speed guide pipe 204 also extends through the partition walls 222 and 220 , and one end is exposed to the outside through the first partition wall 200 to receive the exhaust gas transmitted from the engine.

According to one embodiment, the torque controller (torque tube, 208) is a high-speed induction pipe 204 between the position corresponding to the expansion chamber 230, that is, between the second bulkhead 220 and the third bulkhead 222 of the high-speed guide pipe 204. It may be connected to the tube 204 .

The torque control unit 208 may communicate with the high-speed guide tube 204 in a state perpendicular to the high-speed guide tube 204, for example, as shown in FIG. 4 . The cross-sectional area is changed according to the width or length of the torque control unit 208, so that the acceleration force and the torque can be adjusted.

The valve 206 serves to open and close the high-speed guide pipe 204 , and may be arranged outside the third partition wall 222 . As a result, when the valve 206 is turned on, the high-speed guide pipe 204 is closed and the exhaust gas is discharged only through the low-speed guide pipe 202, and when the valve 206 is turned off, the high-speed guide pipe 204 is opened. The exhaust gas may be discharged through the high speed guide tube 204 and the low speed guide tube 202 .

In summary, the sound absorbing chamber 232 is formed between the first and second partition walls 200 and 220 through which one end of the high-speed guide pipe 200 for receiving exhaust gas from the engine passes, and the second partition wall An expansion chamber 230 may be formed between 220 and the third partition wall 222 . That is, the silencer may be implemented as one sound absorbing chamber 232 and one expansion chamber 230 in which the silencer is continuously arranged.

In this structure, as shown in FIG. 4 , the exhaust gas output from the engine enters through one end of the high-speed guide pipe 204 , and the exhaust gas that enters the high-speed guide pipe 204 enters the high-speed guide pipe 204 . ) and may be discharged to the expansion chamber 230 through the torque control unit 208 while being output to the outside.

Then, the exhaust gas discharged through the torque control unit 208 expands in the expansion chamber 230 , and the expanded exhaust gas passes through the second partition wall 220 and is disposed to the outside through the low-speed guide pipe 202 . can be emitted.

At low speed, the high-speed guide pipe 204 is closed by the valve 206 and exhaust gas is discharged to the outside through only the low-speed guide pipe 202 . At this time, the cross-sectional area and length through which the exhaust gas passes according to the length of the torque control unit 208 may vary, so that the torque may vary.

At medium and high speed, the exhaust gas is output to the outside through the high speed guide tube 204 and the low speed guide tube 202, that is, the high speed guide tube 204 and the low speed guide tube 202 act simultaneously. At this time, the expansion chamber 230 reduces a large pressure and acts as a resonator, that is, it can generate a sports sound.

According to one embodiment, the frequency of the high-speed guide tube 204 through which the exhaust gas flows rapidly and the frequency of the low-speed guide tube 202 flowing through the sound absorption chamber 232 are different, and as a result, different frequencies are mixed to form a sound-absorbing type silencer and bulkhead type mufflers and other sports sounds.

5 to 7 are views showing the structure of a silencer for a vehicle according to a second embodiment of the present invention.

The structure of the silencer of this embodiment is the same as that of the first embodiment, except that the cover has a flat structure rather than a bent structure.

8 to 17 are views showing the structure of a silencer for a vehicle according to a third embodiment of the present invention.

8 to 17 , the silencer of this embodiment has a complex structure consisting of two expansion chambers 1030 and 1130 and one sound absorption chamber 1032, and has a structure similar to the silencer of the first embodiment. It has a structure in which two sub silencers are arranged left and right. However, the two sub silencers may share the sound absorption chamber 1032 .

Specifically, the first expansion chamber 1030 is formed between the first partition wall 1020 and the second partition wall 1022 , and the sound absorption chamber is formed between the second partition wall 1022 and the fourth partition wall 1122 , , a second expansion chamber 1130 may be formed between the fourth partition wall 1122 and the third partition wall 1120 .

In addition, the first low-speed guide pipe 1002 penetrates the second partition wall 1022 and the first partition wall 1020 and is exposed to the outside, and the first high-speed guide pipe 1004 penetrates the first partition wall 1020 and is exposed to the outside. can be exposed to the outside. At this time, a portion of the first high-speed guide pipe 1004 connected to the engine and into which exhaust gas is introduced is arranged between the first and second bulkheads 1020 and 1022 , and the first and second bulkheads 1020 and 1022 . Between the partition walls 1022 , the first torque control unit 1008 may communicate with the first high-speed guide tube 1004 .

For example, the first torque control unit 1008 may be vertically connected from the first high-speed guide tube 1004 between the first bulkhead 1020 and the second bulkhead 1022 . As a result, some of the exhaust gas introduced from the engine through the first high-speed guide tube 1004 is discharged to the outside through the first high-speed guide tube 1004 , and the remainder is expanded in the first expansion chamber 1030 after It may be discharged to the outside through the first low-speed guide tube (1002).

The first valve 1006 is formed in the first high-speed guide tube 1004 to open and close the first high-speed guide tube 1004, and a through hole is formed in the first low-speed guide tube 1002 in the sound absorption chamber 1032, A sound absorbing material may be filled on the first low-speed guide tube 1002 in the sound absorbing chamber 1032 .

In addition, the second low-speed guide pipe 1102 penetrates the fourth partition wall 1122 and the third partition wall 1120 and is exposed to the outside, and the second high-speed guide pipe 1104 penetrates the third partition wall 1120 and is exposed to the outside. can be exposed to the outside. At this time, a portion of the second high-speed guide tube 1104 connected to the engine and into which exhaust gas is introduced is arranged between the third partition wall 1120 and the fourth partition wall 1122 , and in the second expansion chamber 1130 . The second torque control unit 1108 may be in communication with the second high-speed guide tube 1104 .

For example, the second torque control unit 1108 may be vertically connected from the second high-speed guide pipe 1104 between the third bulkhead 1120 and the fourth bulkhead 1122 . As a result, some of the exhaust gas introduced from the engine through the second high-speed guide tube 1104 is discharged to the outside through the second high-speed guide tube 1104, and the rest is expanded in the second expansion chamber 1130. The second low-speed guide pipe 1102 may be discharged to the outside.

The second valve 1106 is formed in the second high-speed guide tube 1104 to open and close the second high-speed guide tube 1104, and a through hole is formed in the second low-speed guide tube 1102 in the sound absorption chamber 1032, A sound-absorbing material may be filled on the second low-speed guide tube 1102 in the sound-absorbing chamber 1032 .

In addition, a portion of the first low-speed guide tube 1002 and a portion of the second low-speed guide tube 1102 are arranged in the sound absorption chamber 1032, but the first low-speed guide tube 1002 and the second low-speed guide tube 1102 are spaced apart from each other.

According to an embodiment, the frequency of the first high-speed guide tube 1004 through which the exhaust gas flows rapidly and the frequency of the first low-speed guide tube 1002 through the sound absorption chamber 1032 may be different from each other, and the frequency of the second high-speed guide tube 1002 may be different. The frequency of 1104 and the frequency of the second low-speed guide tube 1102 may be different. As a result, different frequencies can be mixed and excel at producing different sports sounds than sound-absorbing type silencers and bulkhead type mufflers.

On the other hand, the components of the above-described embodiment can be easily grasped from a process point of view. That is, each component may be identified as a respective process. In addition, the process of the above-described embodiment can be easily understood from the point of view of the components of the apparatus.

The above-described embodiments of the present invention have been disclosed for the purpose of illustration, and various modifications, changes, and additions will be possible within the spirit and scope of the present invention by those skilled in the art having ordinary knowledge of the present invention, and such modifications, changes and additions should be regarded as belonging to the following claims.

100: case 200: first bulkhead
202: low-speed guide tube 204: high-speed guide tube
206: valve 208: torque control
220: second bulkhead 222: third bulkhead
230: expansion chamber 232: sound absorption chamber
1002: first low-speed guide tube 1004: first high-speed guide tube
1006: first valve 1008: first torque control unit
1020: first bulkhead 1022: second bulkhead
1030: first expansion chamber 1032: sound absorption chamber
1102: second low-speed guide tube 1104: second high-speed guide tube
1106: second valve 1108: second torque control unit
1120: third bulkhead 1122: fourth bulkhead
1130: second expansion chamber

Claims (10)

a first partition wall, a second partition wall, and a third partition wall sequentially arranged;
a low-speed guide pipe formed from the outside of the third bulkhead through the third and second bulkheads to between the first and second bulkheads;
a high-speed guide pipe spaced apart from the low-speed guide pipe and formed through the third partition wall, the second partition wall, and the first partition wall from the outside of the third partition wall; and
including a torque control,
an expansion chamber is formed between the second partition wall and the third partition wall, and a sound absorption chamber is formed between the first partition wall and the second partition wall;
The torque control unit is connected to the high-speed guide tube in the expansion chamber, and the torque varies according to the width or length of the torque control unit,
The exhaust gas is inputted to one end of the high-speed guide pipe passing through the first bulkhead, and the input exhaust gas is discharged through the other end of the high-speed guide pipe or the low-speed guide pipe. The method of claim 1,
Further comprising a valve for opening and closing the high-speed induction pipe,
The silencer for a vehicle, characterized in that the width of the high-speed guide tube is greater than the width of the low-speed guide tube. According to claim 1, wherein the torque controller is a torque tube formed perpendicular to the high-speed guide tube in the expansion chamber, the exhaust gas discharged through the torque controller is input to the low-speed guide tube after being expanded in the expansion chamber A silencer for a vehicle, characterized in that it becomes. According to claim 1, wherein a plurality of through-holes are formed on the low-speed guide tube in the sound-absorbing chamber,
In the sound absorption chamber, the low speed guide pipe has a 'U' shape, and one end of the low speed guide pipe is arranged through the second partition wall so that the exhaust gas output from the torque control unit is input to the low speed guide pipe A silencer for a vehicle, characterized in that. The silencer for a vehicle according to claim 1, wherein a frequency of the high-speed guide tube through which exhaust gas flows rapidly and a frequency of the low-speed guide tube arranged through the sound absorption chamber are different from each other. a first partition, a second partition, a fourth partition, and a third partition, which are sequentially arranged;
a first low-speed guide pipe formed from the outside of the first partition wall through the first partition wall and the second partition wall to between the second partition wall and the fourth partition wall;
a first high-speed guide pipe spaced apart from the first low-speed guide pipe and formed from the outside of the first partition wall to the first partition wall through the first partition wall and between the first partition wall and the second partition wall;
a second low-speed guide pipe formed from the outside of the third bulkhead through the third and fourth bulkheads to a space between the second bulkhead and the fourth bulkhead;
a second high-speed guide pipe spaced apart from the second low-speed guide pipe and formed from the outside of the third partition wall to the third partition wall through the third partition wall and between the third partition wall and the fourth partition wall; and
a first torque control unit and a second torque control unit;
The first low-speed guide tube, the first high-speed guide tube, and the first torque controller form a first sub silencer, and the second low-speed guide tube, the second high-speed guide tube, and the second torque bare part form a second to form a sub silencer,
A first expansion chamber is formed between the first partition wall and the second partition wall, a second expansion chamber is formed between the third partition wall and the fourth partition wall, and a sound absorption between the second partition wall and the fourth partition wall a chamber is formed so that the first sub silencer and the second sub silencer share the sound absorption chamber;
The first torque control unit is connected to the first high-speed guide tube in the first expansion chamber, and the second torque control unit is formed by being connected to the second high-speed guide tube within the second expansion chamber, The silencer for a vehicle, characterized in that the torque varies according to the width or length of the first torque control unit or the second torque control unit. 7. The method of claim 6,
a first valve for opening and closing the first high-speed guide pipe; and
Further comprising a second valve for opening and closing the second high-speed induction pipe,
a width of the first high-speed guide tube is greater than a width of the first low-speed guide tube, and a width of the second high-speed guide tube is greater than a width of the second low-speed guide tube;
One end of the first high-speed guide tube is located in the first expansion chamber, the exhaust gas discharged from the engine is input through the one end,
One end of the second high-speed guide pipe is located in the second expansion chamber, and the exhaust gas discharged from the engine is inputted through the one end. 7. The method of claim 6, wherein the first torque control unit is a torque tube formed perpendicular to the first high-speed guide tube, and the second torque control unit is a torque tube formed perpendicular to the second high-speed guide tube,
The exhaust gas proceeding through the first high-speed guide pipe is inputted to the first low-speed guide pipe through the first torque controller and discharged;
The exhaust gas traveling through the second high-speed guide pipe is input to the second low-speed guide pipe through the second torque controller and discharged. The method of claim 6, wherein a plurality of through-holes are respectively formed on the first low-speed guide tube and the second low-speed guide tube in the sound-absorbing chamber,
In the sound absorption chamber, the first low speed guide pipe and the second low speed guide pipe have a 'U' shape, and one end of the first low speed guide pipe is arranged through the second partition wall, and the first torque control unit The exhaust gas output from the is inputted to the first low speed guide pipe, and one end of the second low speed guide pipe is arranged through the fourth partition wall so that the exhaust gas output from the second torque control unit is supplied to the second low speed guide pipe. A silencer for a vehicle, characterized in that it is input to the guide tube. The sound absorption according to claim 1, wherein the frequency of the first high-speed guide tube through which the exhaust gas flows rapidly and the frequency of the first low-speed guide tube arranged through the sound absorption chamber are different, or the frequency of the second high-speed guide tube and the sound absorption chamber are different. A silencer for a vehicle, characterized in that the frequency of the second high-speed guide tube arranged through the chamber is different.

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