KR20090013185U - Muffler for Automobile - Google Patents

Abstract

The present invention relates to an automobile silencer, and more particularly, in an automobile silencer composed of a total muffler and a rear muffler, the partition wall yoke 207a, inside the rear muffler main body 201 provided with end plates 221 and 222. A first partition 207 and a second partition 208 each having 208a formed thereon, and a fourth partition 210 is provided near the other end plate; and a suction pipe 202 through which exhaust gas flows from the entire muffler is provided. An outlet pipe 2202b is formed on the outer circumferential surface of the suction pipe 202 located in the second space 213 through the first space 212 and the second space 213, and the outlet communicates with the third space 214. Is provided; A bypass tube 204 for communicating the first space 212 and the fifth space 212 is provided; The inlet 203-In communicates with the fifth space 216 and the outlet 203-Out is fixed to one end plate 221 to communicate with the outside, and the fourth and third spaces 215 and 214 are provided. It relates to a vehicle muffler, characterized in that it comprises a rear muffler 200 is provided with a main space 203 formed through the two space 213, the first space 212.

Silencer, Muffler, Suction Tube, Discharge Tube

Description

Car Muffler {Muffler for Automobile}

The present invention relates to an automobile silencer, and more particularly, to an automobile silencer that is easy to manufacture and maintains a long service life while providing an excellent noise reduction effect by a combination configuration of all mufflers and rear mufflers.

In an engine of an automobile using an engine of an internal combustion engine as a power source, since high-temperature, high-pressure exhaust gas is discharged with severe noise, a silencer is used as a means for reducing the exhaust noise and pressure of the exhaust gas. At present, the demand level of the demand for the silencer of automobiles is increasing day by day, and the composition of the silencer is becoming more and more complicated. The more complicated the configuration, the better the noise effect of the desired bar, but the more This difficult and costly production cost, and also has a number of vulnerable parts to the high-temperature, high-pressure exhaust gas, and the problems are frequent, such as the failure and shorten the service life. That is, the conventional silent silencers are relatively simple and easy to manufacture is difficult to achieve the required level of noise effect, and the good noise effect is too complicated and difficult to manufacture due to the complicated configuration and expensive manufacturing cost. There were frequent problems with short lifespans.

The present invention has been devised in this background, and its purpose is to show excellent noise reduction effect through acoustic tuning of the internal structure of the silencer, and without difficulty in terms of manufacturability and manufacturing cost, and also an efficient and durable configuration. The purpose is to provide a silencer for a car with a long service life.

Automobile silencer according to the present invention, in the silencer for automobile composed of all muffler and rear muffler,

A first partition 207 and a second partition 208 each having partition wall ribs 207a and 208a are formed in the rear muffler main body 201 having the end plates 221 and 222, respectively. 210 is provided near the other end plate;

A first space 212 is provided between the one end plate 221 and the first partition 207 having the suction pipe inlet 202-In and the main discharge pipe outlet 203-Out, and the first partition 207 is provided. ) And a second space 213 is provided between the second partition wall 208 and third and fourth spaces 214 and 215 between the second partition wall 208 and the fourth partition wall 210. A fifth space 215 is provided between the fourth partition wall 210 and the other end plate 222;

The suction pipe 202 into which exhaust gas flows from the all muffler is sequentially passed through the first space 212 and the second space 213, and the outlet communicates with the third space 214, and the second space 213 is provided. A suction pipe hole 2 202b is provided on an outer circumferential surface of the suction pipe 202 located in the upper portion of the suction pipe 202;

A bypass tube 204 for communicating the first space 212 and the fifth space 212 is provided;

The inlet 203-In communicates with the fifth space 216 and the outlet 203-Out is fixed to one end plate 221 to communicate with the outside, and the fourth and third spaces 215 and 214 are provided. It is characterized in that it comprises a rear muffler 200 is provided with a main-discharge pipe 203 formed through the two space 213, the first space 212.

According to the present invention solves the problems of the prior art, according to the present invention is easy to manufacture and maintain a long service life while providing excellent noise reduction effect by the combination of all the muffler and the rear muffler as described above An automobile silencer is provided.

By combining a plurality of small capacity mufflers, there is provided an automobile silencer that can effectively reduce exhaust noise of a vehicle having a large displacement while using a limited space at the bottom of the vehicle. A high performance automotive silencer is provided which is excellent in noise attenuation, productive and has only a moderate level of back pressure loss.

According to the present invention, an efficient exhaust noise attenuation path is formed by the arrangement of the bulkhead and the arrangement of the suction, discharge, bypass, and sound absorbing materials in a small-capacity muffler, and the length of the discharge pipe is increased to reduce noise without increasing the back pressure. Automotive silencers are provided to increase the effectiveness.

Hereinafter, the configuration and operation of a vehicle silencer according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. 1 is a block diagram of an all-muffler of an automobile silencer according to an embodiment of the present invention, Figure 2 is a block diagram of a partition provided in all mufflers according to an embodiment of the present invention.

As shown in FIG. 1 or FIG. 2, the total muffler 100 has both ends closed with end plates 121 and 122 and a total muffler main body 101 in which the first partition 104 is vertically provided in the inner space. And a sound absorbing material 105 filled in the space inside the total muffler main body 101, and a suction / discharge pipe 103 formed through the total muffler main body 101 and having suction and discharge pipe holes 103a and 103a 'formed on an outer circumferential surface thereof. And meshes 103b and 103b 'surrounding the suction and discharge tube holes 103a and 103a'. The mesh is preferably made of stainless steel.

As for all muffler 100, the partition wall hole 104a is provided in the 1st partition 104, the 1st space 106 and the 2nd space 107 are communicated, and all the muffler 100 is a suction and discharge pipe | tube. Exhaust noise passing through the 103 is diffused and attenuated into the space 106 and the space 107 through the intake and discharge pipe holes 103a and 103a ', and enters the space 106 and the space 107. The high frequency component of the noise is further attenuated by the sound absorbing material 105.

Figure 3 is a configuration of the rear muffler according to an embodiment of the present invention, Figure 4 is a configuration of the first partition wall of the rear muffler according to an embodiment of the present invention, Figure 5 is a rear muffler according to an embodiment of the present invention 6 is a third partition wall configuration of the rear muffler according to an embodiment of the present invention, Figure 7 is a fourth partition wall configuration of the rear muffler according to an embodiment of the present invention.

The rear muffler 200 includes a rear muffler main body 201 having end plates 221 and 222, a plurality of partitions 207, 208, 209 and 210, a suction pipe 202, a bypass pipe 204 and a main- It is configured to include a discharge pipe (203).

As shown in FIG. 3, the first partition wall 207 and the second partition wall 208 having partition wall grooves 207a and 208a formed inside the rear muffler body 201 having the end plates 221 and 222, respectively. Is provided, the fourth partition 210 is provided near the other end plate. As shown in FIG. 7, the fourth partition wall 210 does not have a partition hole except for a pipe passage hole, but both the first partition wall 207 and the second partition wall 208 are partition wall holes.

Between the second diaphragm 208 and the fourth diaphragm 210, a third diaphragm 209 having a diaphragm 209a may be further provided, and the purpose of the third diaphragm 209 may be defined by the conduit rather than the space compartment. Perform the support and fixing function. Application of the third diaphragm 209 is optional.

A first space 212 is provided between the one end plate 221 and the first partition 207 having the suction pipe inlet 202-In and the main discharge pipe outlet 203-Out, and the first partition 207 is provided. ) And the second partition 208 is provided with a second space 213. The first space 212 and the second space 213 are communicated by the partition hole.

 Third and fourth spaces 214 and 215 are provided between the second partition wall 208 and the fourth partition wall 210, and a fifth space between the fourth partition wall 210 and the other end plate 222 is formed. 215 is provided. The third and fourth spaces 214 and 215 communicate with each other, and the fifth space 215 is closed except for the through passage.

The suction pipe 202 into which the exhaust gas flows from the all muffler is sequentially communicated with the third space 214 through the first space 212 and the second space 213. A suction pipe hole 2 202b is provided on an outer circumferential surface of the suction pipe 202 located in the second space 213.

The bypass pipe 204 communicates the first space 212 and the fifth space 212.

 The main discharge pipe 203 communicates with the outside by the inlet 203-In communicating with the fifth space 216 and the outlet 203-Out fixed to one end plate 221. The main discharge pipe 203 is formed through the fourth and third spaces 215 and 214, the second space 213, and the first space 212.

The rear muffler of the automotive silencer of the present invention preferably further comprises a sub-discharge tube 204. As shown in FIG. 3, the sub-discharge pipe 204 has an inlet 204-In communicating with the first space 212, and the second, third, fourth, and fifth spaces 213, 214, and 215. , 216, and the outlet penetrates the other end plate 222.

The sub-discharge tube inlet 204-In is provided with a variable valve 206, which is configured to close when the vehicle is idle and open when the engine speed increases or the back pressure inside the muffler increases.

The action according to each configuration of the present invention is as follows. The noise of the exhaust gas introduced through the inlet 202-In of the suction pipe is attenuated as it diffuses into the second space 213 through the suction pipe hole 2 202b, and also through the outlet 202-Out in the third space. Attenuated while being diffused to 214, the exhaust gas of the third space 214 moves to the second space 213 through the partition hole 208a and attenuates its noise, and exhaust gas of the second space 213. The noise is attenuated while moving to the first space 212 through the partition hole 207a.

The exhaust noise of the first space 212 is attenuated as it diffuses into the fifth space 216 after passing through the bypass pipe 205, and the exhaust gas of the fifth space 216 is discharged from the main-exhaust pipe inlet 203-In. And flows out through the main-discharge pipe 203 to the outside, and when the engine speed increases or the back pressure inside the muffler increases, the variable valve 206 opens the sub-discharge pipe inlet 204-In. Thus, the exhaust gas of the first space 212 is further discharged along the sub-discharge pipe 204 to the outlet 204-Out opposite to the outlet of the main-discharge pipe 203.

In the automobile silencer of the present invention, the opening area of the partition wall hole 207a provided in the first partition wall 207 is 80 to 120% of the cross sectional area of the suction pipe 202, and the suction pipe hole formed in the outer peripheral surface of the suction pipe 202. The opening area of 2 (202b) is 80% to 40% of the cross sectional area of the suction pipe 202, and the opening area of the partition hole 208a provided in the second partition 208 is 20 to 60 of the cross sectional area of the suction pipe 202. Is preferably%.

First, if the opening area of the suction pipe hole 2 202b is too large, the amount of exhaust gas flowing to the suction pipe outlet 202-Put is relatively small. First, if the opening area of the suction pipe hole 2 202b is too small, the suction pipe outlet 202- The amount of exhaust gas flowing into Put) becomes large.

The amount of exhaust gas discharged into the second space 213 through the suction pipe hole 2 (202b) is 80% to 40%, and the amount flowing to the suction pipe outlet 202-Put is 20 to 60%. When the opening area of the partition wall hole 207a provided in the first partition wall 207 is 80 to 120% of the cross sectional area of the suction pipe 202, it can be seen from the test that it shows excellent performance in terms of back pressure and noise. .

In the automobile silencer of the present invention, as shown in Figure 1, for reducing the noise of a specific frequency, the suction pipe hole 1 (202a) is further provided on the outer peripheral surface of the suction pipe 202 located in the first space (212) This is preferred. The opening area of the suction pipe hole 1 202a located in the first space is preferably 1 to 10% of the cross sectional area of the suction pipe 202. If the open area is too large, the effect of the specific frequency is reduced, and if the open area is too small, the effect of reducing the specific frequency noise is reduced.

In the silencer for automobiles of the present invention, as shown in FIG. 1, a portion of the bypass pipe 204 positioned in the second space 213 may further include a bypass pipe hole 205a on its outer circumferential surface. have. Thus, the exhaust gas of the second space 213 is configured to flow directly into the bypass pipe hole 205a.

In the silencer for automobiles of the present invention, as shown in Figure 1, to prevent deformation of the partition wall may be further provided between the support bar 211. In addition, a resonator 203b is further provided on the outer circumferential surface of the main discharge pipe 203 so that the high frequency noise introduced through the discharge pipe hole 203a is attenuated by the sound absorbing material 203c inside the resonator 203b, and the sub-discharge pipe A resonator 204b is further provided on the outer circumferential surface of 204 so that the high frequency noise introduced through the discharge pipe hole 204a is attenuated by the sound absorbing material 204c inside the resonator 204b.

Hereinafter will be described in detail the operation according to the configuration of the vehicle silencer according to an embodiment of the present invention. The present invention relates to a muffler which is an automobile exhaust noise attenuation component, and is composed entirely of a muffler and a rear muffler. Each of the front and rear mufflers consists of straight pipes, porous tubes, regulators, bypass pipes, curved pipes, variable valves, and the like. Noise is attenuated by exhaust gas from the engine passing through the front and rear silencers. At this time, the variable valve was used to further improve the performance of the car and reduce the noise.

In the silencer of the present invention, the noise of the exhaust gas introduced through the inlet 202-In of the suction pipe is attenuated while being diffused into the second space 213 through the suction pipe hole 2 202b, and further, the outlet 202-. Attenuates while being diffused into the third space 214 through Out).

The exhaust gas of the third space 214 moves to the second space 213 through the partition hole 208a, and the noise is attenuated, and the exhaust gas of the second space 213 is removed through the partition hole 207a. The noise is attenuated while moving to one space 212.

 The exhaust noise of the first space 212 is attenuated while passing through the bypass pipe 205 and diffused into the fifth space 216. The exhaust gas of the fifth space 216 is introduced through the main discharge pipe inlet 203-In and discharged to the outside along the main discharge pipe 203.

In addition, when the engine speed increases or the back pressure inside the muffler increases, the variable valve 206 opens the sub-discharge pipe inlet 204-In, so that the exhaust gas of the first space 212 additionally receives the sub-discharge pipe 204. Is discharged to an outlet 204-Out opposite to the outlet of the main-discharge tube 203.

The muffler of the present invention is to attenuate the sound while passing through the muffler 100, and then to further attenuate the negative in the rear muffler 200 to discharge the exhaust gas into the atmosphere, all of the muffler main body 101 inside Exhaust sound expands to the spaces 105 and 106 through the suction and discharge pipe holes 102a to lower the sound pressure, and at the same time, the sound absorbing material 104 contained in the spaces 105 and 106 attenuates the noise in the high frequency region. In order to prevent the radiation of 104, the stainless steel mesh 102b was used for the inlet / outlet tube hole 102a. The partition 103 secures the internal suction and discharge pipe 102 and the entire muffler main body 101 to reduce radiation noise, and maximizes the partition hole 103a in order to make the best use of the spaces 105 and 106 of the main body 102. .

The rear muffler 200 of the present invention is composed of two discharge pipes 203 and 204, and the sub (left) discharge pipe 204 is equipped with a variable valve 206 to control noise in a low flow rate area and in a high flow rate area. Reduced back pressure improves engine performance.

Exhaust gas introduced through the suction pipe 202 exits the spaces 212 and 213 through the suction pipe hole 1 202a and the suction pipe hole 2 202b, and attenuates the noise. Noise is reduced. The exhaust gas in the space 214 moves through the partition holes 208a and 209a to the adjacent spaces 213 and 215, whereby the offset of noise is greater.

In addition, the exhaust gas of the space 212 is divided into two ways. First, the gas exiting the sub (left) discharge pipe 204 having the variable valve 206 affects noise and performance at low flow rate and high flow rate, and is discharged. The resonator 204b was used to attenuate the sound in the high frequency region.

Some of the exhaust gas of the space 212 flows through the bypass pipe 205 to the space 216 and then flows back to the main (right) discharge pipe 203, which bypasses the specific frequency noise. In addition to acting as an attenuation and at the same time as the extension of the discharge pipe 203 together with the space 216 to attenuate the noise by a gradual pressure attenuation, using the resonator 203b attenuates the sound in the high frequency range together. I did it. The support bar 211 of the present invention is to prevent deformation of the partition wall during muffler fabrication.

Although the present invention has been described with reference to the above-mentioned preferred embodiments, the scope of the present invention is not limited to these embodiments, the scope of the present invention is defined by the claims below and equivalent scope of the present invention It will include various modifications and variations belonging to.

The reference numerals set forth in the claims below are merely to aid the understanding of the invention and do not affect the interpretation of the scope of the claims, and the scope of the claims should not be construed narrowly.

1 is a schematic diagram of an all-muffler of an automobile silencer according to an embodiment of the present invention.

Figure 2 is a partition configuration diagram provided in all mufflers according to an embodiment of the present invention.

Figure 3 is a rear muffler configuration according to an embodiment of the present invention.

Figure 4 is a first partition wall configuration of the rear muffler according to an embodiment of the present invention.

5 is a second partition wall configuration of the rear muffler according to an embodiment of the present invention.

Figure 6 is a third partition wall configuration of the rear muffler according to an embodiment of the present invention.

7 is a fourth partition wall configuration of the rear muffler according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: all muffler 101: all muffler body

102: suction and discharge pipe 102a: suction and discharge pipe hole

102b: stainless steel mesh 103: bulkhead-1

103a: partition hole 104: sound absorbing material

105, 106: space

200: rear muffler 201: rear muffler body

202: suction pipe 202a: suction pipe hole 1

202b: suction pipe hole 2 203: main discharge pipe

203a: exhaust pipe hole 203b: resonator

203c: Sound absorbing material 204: Sub-discharge tube

204a: discharge pipe hole 204b: resonator

204c: Sound absorbing material 205: Bypass pipe

205a: bypass pipe hole 206: variable valve

207, 208, 209, 210: bulkhead 207a, 208a, 209a: bulkhead hole

211: support rod

212, 213, 214, 215, 216: first, second, third, fourth, fifth space

Claims (9)

In the silencer for automobile composed of all muffler and rear muffler, A first partition 207 and a second partition 208 each having partition wall ribs 207a and 208a are formed in the rear muffler main body 201 having the end plates 221 and 222, respectively. 210 is provided near the other end plate; A first space 212 is provided between the one end plate 221 and the first partition 207 having the suction pipe inlet 202-In and the main discharge pipe outlet 203-Out, and the first partition 207 is provided. ) And a second space 213 is provided between the second partition wall 208 and third and fourth spaces 214 and 215 between the second partition wall 208 and the fourth partition wall 210. A fifth space 215 is provided between the fourth partition wall 210 and the other end plate 222; The suction pipe 202 into which exhaust gas flows from the all muffler is sequentially passed through the first space 212 and the second space 213, and the outlet communicates with the third space 214, and the second space 213 is provided. A suction pipe hole 2 202b is provided on an outer circumferential surface of the suction pipe 202 located in the upper portion of the suction pipe 202; A bypass tube 204 for communicating the first space 212 and the fifth space 212 is provided; The inlet 203-In communicates with the fifth space 216 and the outlet 203-Out is fixed to one end plate 221 to communicate with the outside, and the fourth and third spaces 215 and 214 are provided. A silencer for automobiles, comprising a rear muffler (200) having two main spaces (213) and a main discharge pipe (203) formed through the first space (212). The method of claim 1, The inlet 204-In communicates with the first space 212, passes through the second, third, fourth, and fifth spaces 213, 214, 215, 216, with the outlet being the other endflight 222. A sub-discharge tube 204 penetrating) is further provided, The sub-discharge pipe inlet 204-In is provided with a variable valve 206, the variable valve 206 is configured to close when the vehicle idles and to open when the engine speed increases or the back pressure inside the muffler increases. Automotive silencer, characterized in that. The method of claim 2, The noise of the exhaust gas introduced through the inlet 202-In of the suction pipe is attenuated as it diffuses into the second space 213 through the suction pipe hole 2 202b, and also through the outlet 202-Out in the third space. Attenuated by spreading to (214), The exhaust gas of the third space 214 moves to the second space 213 through the partition hole 208a, and the noise is attenuated, and the exhaust gas of the second space 213 is removed through the partition hole 207a. The noise is attenuated while moving to one space 212,  The exhaust noise of the first space 212 is attenuated while passing through the bypass pipe 205 and diffused into the fifth space 216, Exhaust gas of the fifth space 216 is introduced through the main discharge pipe inlet 203-In and discharged to the outside along the main discharge pipe 203. In addition, when the engine speed increases or the back pressure inside the muffler increases, the variable valve 206 opens the sub-discharge pipe inlet 204-In, so that the exhaust gas of the first space 212 additionally receives the sub-discharge pipe ( A silencer for automobiles, characterized by being discharged along an outlet 204-Out opposite the outlet of the main-discharge tube 203 along 204. The method of claim 2, The all muffler 100, Both ends are finished with end plates 121 and 122, and the main muffler body 101 having the first partition wall 104 vertically provided in the inner space, and the sound absorbing material 105 filled in the space inside the all muffler body 101. ), A suction / exhaust tube 103 which penetrates the main muffler main body 101 and has suction and discharge tube holes 103a and 103a 'formed on an outer circumferential surface thereof, and a mesh surrounding the suction and discharge tube holes 103a and 103a'. 103b, 103b '). The method of claim 2, A silencer for automobiles, further comprising a third diaphragm (209) having a diaphragm (209a) between the second diaphragm (208) and the fourth diaphragm (210). The method of claim 2, The opening area of the partition hole 207a provided in the first partition 207 is 80 to 120% of the cross sectional area of the suction pipe 202, The opening area of the suction pipe hole 2 (202b) formed on the outer circumferential surface of the suction pipe 202 is 80% to 40% of the cross sectional area of the suction pipe 202, The silencer for automobiles, characterized in that the opening area of the partition wall hole (208a) provided in the second partition wall (208) is 20 to 60% of the cross section of the suction pipe (202). The method of claim 6, In order to reduce the noise of a specific frequency, the suction pipe hole 1 (202a) is further provided on the outer circumferential surface of the suction pipe 202 located in the first space 212, A silencer for automobiles, characterized in that the opening area of the suction pipe hole 1 (202a) located in the first space is 1 to 10% of the cross-sectional area of the suction pipe (202). The method of claim 6, Part of the bypass pipe 204 located in the second space 213 is further provided with a bypass pipe hole 205a on the outer peripheral surface thereof, A silencer for automobiles, characterized in that the exhaust gas of the second space (213) is introduced directly into the bypass pipe hole (205a). The method of claim 6, Support rods 211 are further provided between the partition walls to prevent deformation of the partition walls. A resonator 203b is further provided on the outer circumferential surface of the main discharge pipe 203 so that high frequency noise introduced through the discharge pipe hole 203a is attenuated by the sound absorbing material 203c inside the resonator 203b. The outer circumferential surface of the sub-discharge tube 204 is further provided with a resonator 204b is characterized in that the high-frequency noise introduced through the discharge pipe hole 204a is attenuated by the sound absorbing material 204c inside the resonator 204b silencer.

Images