KR200457686Y1 - Vehicle muffler - Google Patents

Abstract

The present invention relates to a muffler for a vehicle, and more particularly, a housing having an inlet and an exhaust part in which exhaust gas flows in and out; And a noise reduction part provided in the housing to reduce noise of exhaust gas, wherein the housing comprises an upper housing and a lower housing detachably coupled to the upper housing, and the upper housing. And the lower housing relates to a vehicle muffler, characterized in that injection molded or press-molded in one material selected from engineering plastics, aluminum, titanium.

The present invention configured as described above can be induced to reduce the weight of the vehicle muffler as well as reduce noise because the housing consisting of the upper housing and the lower housing is injection molded or press-molded with one material selected from engineering plastics, aluminum and titanium. Without the need for welding in the housing, it can be more efficiently arranged in the housing according to the engine exhaust characteristics, and furthermore, the final finished product can be used by a simple assembly process of the fitting type, the structure is simple and compared with the conventional Since the number of processes is significantly reduced, there is an effect that can minimize the manufacturing cost accordingly.

Housing, Noise Reduction

Description

Car muffler {VEHICLE MUFFLER}

The present invention comprises a housing having an inlet and an exhaust portion in which exhaust gas flows in and out of exhaust gas, respectively; And a noise reduction part provided in the housing to reduce noise of exhaust gas, wherein the housing comprises an upper housing and a lower housing detachably coupled to the upper housing, and the upper housing. And the lower housing relates to a vehicle muffler, characterized in that injection molded or press-molded in one material selected from engineering plastics, aluminum, titanium.

In general, a muffler / silencer is a device that attenuates exhaust noise by lowering the temperature and pressure of the exhaust gas discharged from the engine. The exhaust gas from the exhaust manifold is a high temperature and a high pressure. The explosion causes the explosion sound and may cause a fire. To prevent this, the gas is allowed to expand slowly while reducing the back pressure so that the loss of output is within 5%.

More specifically, the muffler includes a housing provided with both an inlet and an exhaust part in which exhaust gas from the engine of the vehicle flows in and out; And a noise reduction part provided in the housing to reduce noise of the exhaust gas. In this case, the housing of the muffler is usually press-molded with a metal material, and the metal material for guiding the flow of the exhaust gas therein. The guide plate and the non-flammable fiber are bent and welded into the housing after being bent in accordance with the shape of the housing, and the noise reduction part is also bent in accordance with the shape of the housing and then welded into a complex shape in the housing. .

Here, the operator has to bend and weld the metal guide plate and noise reduction part according to the shape of the housing every time, and the cost is excessive because the number of processes for manufacturing the muffler is large. In addition, steel, stainless steel, etc., inevitably cause rust due to the inherent characteristics of the material, and eventually replace it periodically due to a function leakage due to corrosion.

Furthermore, there is a problem in that the weight of the muffler cannot be induced by increasing its weight during the manufacturing of the muffler including the essential functions.

The present invention was created in order to solve the above-mentioned problems. Since the housing consisting of the upper housing and the lower housing is injection molded or press-molded with one material selected from engineering plastic, aluminum and titanium, In addition to the induction, the noise reduction part can be arranged more efficiently and efficiently in the housing according to the engine exhaust characteristics without the need to weld the noise into the housing, and further, the final finished product can be used by a simple assembly process of the fitting type. Of course, since its structure is simple and the number of processes is considerably reduced compared with the prior art, it is an object of the present invention to provide a high-performance, ultra-lightweight and semi-permanent vehicle muffler that can minimize the manufacturing cost accordingly.

The present invention for achieving the above object is a housing provided with both the inlet and the exhaust portion in which the exhaust gas flows in and out; And a noise reduction part provided in the housing to reduce noise of exhaust gas, wherein the housing comprises an upper housing and a lower housing detachably coupled to the upper housing, and the upper housing. And the lower housing provides a vehicle muffler, characterized in that the injection molded or press-molded in one material selected from engineering plastics, aluminum, titanium.

Here, the upper housing and the lower housing is made by injection molding of engineering plastic, it is preferable that the heat resistant layer is formed on the inner surface of the upper housing and the lower housing.

In addition, the heat-resistant layer formed on the inner surface of the upper housing and the lower housing is preferably made of one or more selected from glass fibers, carbon fibers and polyimide.

In addition, the noise reduction portion and one side and the other side vortex member is fixed to the inlet and exhaust portion; An inlet pipe having both ends open in the upper housing and the lower housing so as to be positioned between the one side and the other vortex member; And an auxiliary inlet pipe having both ends opened in the upper housing and the lower housing so as to be positioned before and after the inflow pipe, respectively.

In addition, the upper and lower receiving members are formed vertically at regular intervals in the upper housing and the lower housing, the upper receiving space and the lower receiving space, respectively, which receive upper and lower ends of the inlet pipe and the auxiliary inlet pipe, respectively. The one side vortex member and the other side vortex member include one side and the other body accommodated in the receiving groove formed to a predetermined depth in the inlet and the exhaust; It is formed in a conical shape on the body, a plurality of one side and the other side vortex wings twisted at a predetermined angle; The inlet pipe is one end and the upper side and the lower side is fixed to the upper receiving space and the lower receiving space, one end A pipe member having an inner diameter gradually smaller toward the other end in the direction of the end; A spiral blade formed on an inner circumferential surface of the pipe member, wherein the auxiliary inflow pipe is fixed at one end of the upper and lower ends of the pipe in the upper accommodating space and the lower accommodating space. An auxiliary pipe member which is smaller and in which a plurality of exhaust holes are formed; It is preferably made of an auxiliary spiral blade formed on the inner peripheral surface of the auxiliary pipe member.

The upper housing and the lower housing may be formed by injection molding of aluminum, and heat dissipation fins may be formed on the outer surfaces of the upper and lower housings at predetermined intervals in the longitudinal direction of the upper and lower housings.

In addition, the upper housing and the lower housing is detachably coupled to each other by a fastening member, it is preferable that a sealing pad is provided between the lower edge of the upper housing and the upper edge of the lower housing coupled by the fastening member. .

The present invention is because the housing consisting of the upper housing and the lower housing is injection molded or press-molded with one material selected from engineering plastic, aluminum, titanium, can induce a lighter weight of the muffler for the vehicle, as well as the noise reduction part of the housing. It can be arranged more easily and efficiently in the housing according to the engine exhaust characteristics without the need for welding in the inside, and furthermore, the final finished product can be used by a simple fitting process of fitting type, and its structure is simple and the number of processes Since it is significantly reduced, there is an effect that can minimize the manufacturing cost accordingly.

In addition, when the upper housing and the lower housing are injection molded into the engineering plastic, a heat resistant layer is formed on the inner surfaces of the upper housing and the lower housing, so that the upper housing and the lower housing may be melted by the hot exhaust gas. There is an effect that can be prevented.

In addition, since the heat-resistant layer is made of at least one selected from glass fibers, carbon fibers, and polyimide, the upper housing and the lower housing may be more efficiently prevented from being melted by high temperature exhaust gas. It works.

In addition, the noise reduction part includes one side and the other side vortex member, an inflow pipe, and an auxiliary inflow pipe, so that the noise of the exhaust gas discharged from the engine can be more efficiently reduced.

Furthermore, due to the spiral blade formed on the inner circumferential surface of the inlet pipe pipe member and the auxiliary spiral blade formed on the inner circumferential surface of the auxiliary inlet pipe, noise of the exhaust gas passing through the inside of the inlet pipe and the auxiliary inlet pipe can be more efficiently. There is an effect that can be reduced.

In addition, when the upper housing and the lower housing are injection-molded with aluminum, not only the high heat generated in the housing can be radiated smoothly to the outside due to the high temperature exhaust gas flowing into the housing, but also the upper housing and the lower housing. Due to the heat radiation fins formed on the outer surface of the housing, the high heat generated in the housing may be radiated more smoothly to the outside more smoothly, and the strength of the housing may also be greatly improved.

In addition, as a sealing pad is provided between the lower edge of the upper housing and the upper edge of the lower housing, exhaust gas introduced into the housing may be exposed to the outside through a gap between the upper housing and the lower housing. There is an effect that disappears.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention in more detail as follows. Of course, the scope of the present invention is not limited to the following embodiments, and may be variously modified and implemented by those skilled in the art without departing from the technical gist of the present invention.

1 is a perspective view schematically showing a vehicle muffler according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of FIG. 1.

Vehicle muffler 1 according to an embodiment of the present invention is large, as shown in Figures 1 and 2, comprises a housing 10 and the noise reduction portion 30.

First, the housing 10 is the inlet and exhaust of the exhaust gas discharged from the engine of the vehicle, the inlet portion 5 through which the exhaust gas discharged from the engine of the vehicle is introduced into both sides of the housing 10 and ; Exhaust parts 7 through which the exhaust gas introduced into the housing 10 through the inlet part 5 are exhausted, respectively.

More specifically, the housing 10 has a larger upper housing 110, as shown in Figure 2; And a lower housing 130 coupled to the housing 110 by the fastening member 15.

Here, the upper housing 110 and the lower housing 130 are (PA (polyamide), PEEK (Poly ether-ether-ketone) resin, Teflon, liquid crystal polymer (LCP), polyacetyl, polycarbonate, PBT ( Engineering plastics (polyester resins), modified PPO (polyphenylene oxide), etc. (a high-strength plastic used in industrial and structural materials), which is stronger than steel, more malleable than aluminum, and more expensive than gold and silver. High-performance resin with high chemical resistance.), One of the materials selected from aluminum, titanium, injection molding or press-molded by hydraulic press.

Injection molding, press-molding method of the upper housing 110 and the lower housing 130 is a well-known technology and will be apparent to those skilled in the art to which the present invention pertains will be clearly understood and can be carried out in the following detailed description. Do it.

In addition, the edges of the upper housing 110 and the lower housing 130 may be, for example, mutually fixed and fixed, but are not necessarily limited thereto, and preferably, the noise reduction provided inside the housing. When the part 30 is damaged, the edges of the upper housing 110 and the lower housing 130 are detachably coupled to each other through the fastening member 15 so that the noise reduction unit 30 can be replaced more easily. It is good to let.

Here, the fastening member 15, for example, as shown in Figure 1 and 2, the fixing bolt 151 vertically penetrates the edge of the upper housing 110 and the lower housing 130; Nut 153 is screwed to the lower end of the fixing bolt 151; may be made, but is not necessarily limited thereto.

And, the inlet portion 5 is, for example, as shown in Figure 2, the upper inlet member 51 is formed to protrude outward with the lower portion is open to one side of the upper housing 110; A lower inflow member 53 protruding outward in an open state at one side of the lower housing 130 may be formed.

In addition, the exhaust unit 7 is, for example, as shown in Figure 2, the upper exhaust member 71 and protruding outwardly formed in the lower part in the open state on the other side of the upper housing 110; And a lower exhaust member 73 protruding outward in an open state at an upper portion of the lower housing 130.

3 is a cross-sectional view taken along line AA of FIG. 1.

On the other hand, in order to induce a lighter weight of the vehicle muffler 1, the upper housing 110 and the lower housing 130, in particular, is made by injection molding of engineering plastic, the upper housing 110 and the lower housing 130 The inner surface of the heat resistant layer 150 is preferably formed as shown in FIG.

When the upper housing 110 and the lower housing 130 are injection molded into the engineering plastic, the heat-resistant layer 150 is formed on the inner surfaces of the upper housing 110 and the lower housing 130, so As a result, there is an advantage that the upper housing 110 and the lower housing 130 may be prevented from melting.

The inner surface of the upper housing 110 and the lower housing 130, for example, the heat-resistant layer 150 may be a coating, but is not necessarily limited to this, preferably the upper housing 110 and The lower housing 130 and the heat resistant layer 150 may be easily manufactured in one piece by, for example, one known double injection molding.

Furthermore, the heat resistant layer 150 formed on the inner surfaces of the upper housing 110 and the lower housing 130 may be made of at least one selected from glass fibers, carbon fibers, and polyimide having excellent heat resistance.

Since the heat-resistant layer 150 is made of one or more selected from glass fibers, carbon fibers, and polyimide, the upper housing 110 and the lower housing 130 may be more efficiently melted by high temperature exhaust gas. There is an advantage that can be prevented in advance.

Next, the noise reduction unit 30 is provided in the housing 10 to reduce the noise of the exhaust gas introduced into the housing 10, thereby inducing the weight reduction of the vehicle muffler 1. In order to reduce the noise reduction part 30, it is also preferable that the injection molding is made of one material selected from engineering plastics, aluminum and titanium, in particular, engineering plastics.

In addition, the heat-resistant layer 150 described above is coated on the inner and outer surfaces of the noise reduction unit 30 in order to prevent the noise reduction unit 30 from melting due to the high temperature exhaust gas. good.

As shown in FIG. 2, the noise reduction unit 30 includes, for example, one side and the other side vortex members 310 and 330 accommodated in the inlet part 5 and the exhaust part 7; An inlet pipe 350 having both ends of the upper housing 110 and the lower housing 130 accommodated in the left and right directions so as to be positioned between the one side and the other side vortex members 310 and 330; And an auxiliary inlet pipe 370 in which both ends are fixed in the left and right directions in the upper housing 110 and the lower housing 130 so as to be positioned before and after the inflow pipe 350, respectively. Can be.

The exhaust gas discharged from the engine of the vehicle passes through the inlet part 5, the one side vortex member 310, the inlet pipe 350 and the auxiliary inlet pipe 370, and the exhaust part 7 sequentially, and this process In the noise of the exhaust gas is reduced, which is a well-known technology and those skilled in the art to which the present invention pertains will be clearly understood and can be carried out so that the following detailed description will be omitted.

The noise reduction unit 30 includes the one side and the other side vortex members 310 and 330, the inlet pipe 350, and the auxiliary inlet pipe 370 to more effectively reduce the noise of the exhaust gas discharged from the engine. There is an advantage that can be reduced.

4 is a perspective view schematically illustrating a state in which the upper housing 110 of FIG. 2 is turned upside down, and FIG. 5 is a perspective view schematically illustrating the lower housing 130 of FIG. 2.

Next, an upper accommodating space 160 and a lower portion accommodating one end upper and lower sides of the inflow pipe 350 and the auxiliary inflow pipe 370 are formed at one inner side of the upper housing 110 and the lower housing 130, respectively. The upper and lower receiving members 120 and 140 having the receiving space 180 may be vertically formed in the front and rear directions at a predetermined interval.

The upper accommodating member 120 may include a first upper accommodating member 122 vertically formed in a front-rear direction on an inner side of the upper housing 110 as shown in FIG. 4; And a second upper accommodating member 124 vertically formed in a front-rear direction on one inner side of the upper housing 110 to be positioned at a distance adjacent to the first upper accommodating member 122.

As shown in FIG. 4, the upper accommodating space 160 is formed at a predetermined depth with the lower side open in the center of the first upper accommodating member 122 to accommodate an upper end of the inflow pipe 350. A first upper accommodation space 162; It is formed at a predetermined depth with the lower side open to the first upper receiving member 121 so as to be located before and after the first upper receiving space 161, respectively, to receive an upper end of the auxiliary inflow pipe 370. A second upper accommodating space 164; A third upper accommodating space 166 formed at a predetermined depth with the lower side open at the center of the second upper accommodating member 124 to accommodate the rear upper side of one end of the inflow pipe 350; It is formed at a predetermined depth with the lower side open to the second upper receiving member 124 so as to be located before and after the third upper receiving space 166, respectively, to receive the upper end of one end of the auxiliary inflow pipe 370. It may be made of a fourth upper receiving space (168).

As shown in FIG. 5, the lower accommodating member 140 includes a first lower accommodating member 142 vertically formed in a front and rear direction on an inner side of the lower housing 130; And a second lower accommodating member 144 vertically formed in a front-rear direction on an inner side of the lower housing 130 to be positioned at a distance adjacent to the first lower accommodating member 142.

As shown in FIG. 5, the lower accommodation space 180 is formed at a predetermined depth with an upper side opened in the center of the first lower accommodation member 142 to accommodate one end of the inflow pipe 350. A first lower receiving space 182; It is formed at a predetermined depth with the upper side opened in the first lower receiving member 142 so as to be located before and after the first lower receiving space 182, respectively, so as to receive the lower end of one end of the auxiliary inflow pipe 370. A second lower accommodation space 184; A third lower accommodating space 186 formed at a predetermined depth with an upper side open in a center portion of the second lower accommodating member 144 to accommodate a rear end of one end of the inflow pipe 350; The second lower receiving member 140 is formed at a predetermined depth with the upper side opened so as to be positioned before and after the third lower receiving space 186, so as to accommodate the rear end of one end of the auxiliary inflow pipe 370. It may be made of a fourth lower receiving space (188).

,

)형상의 안내판(122a, 122b, 142a, 142b)이 수직으로 일체형으로 형성될 수 있다.As shown in FIGS. 4 and 5, the front and rear sides of the first upper accommodating member 122 and the first lower accommodating member 142 flow into the inner side of the housing 10 through the inlet 5. To guide the exhaust gas toward the noise reduction unit 30 (

,

The guide plates 122a, 122b, 142a, and 142b of the shape may be vertically integrally formed.

,

형상의 안내판(110a, 110b, 130a, 130b)이 수직으로 일체형으로 형성될 수 있다.As shown in FIGS. 4 and 5, the other side of the upper housing 110 and the lower housing 130 guide exhaust gas passing through the noise reduction unit 30 to the exhaust unit 7.

,

The guide plates 110a, 110b, 130a, and 130b having a shape may be vertically integrally formed.

Next, the one side and the other side vortex members 310 and 330 for vortexing the exhaust gas to reduce the exhaust gas are formed to have a predetermined depth in the inlet part 5 and the exhaust part 7 as shown in FIG. 2. Bodies 311 and 331 accommodated in the grooves 55 and 75 of FIGS. 4 and 5; It is formed in a conical shape on the body (311, 331), it may be composed of a plurality of vortex wings (313, 333) twisted at a predetermined angle.

6 is a perspective view schematically illustrating the inflow pipe 350, and FIG. 7 is a cross-sectional view taken along line BB of FIG. 6.

Next, the inflow pipe 350 is, for example, as shown in FIGS. 6 and 7, one end of the upper side and the lower side is fixed to the upper receiving space 160 and the lower receiving space 180, once A pipe member 351 whose inner diameter gradually decreases from the portion toward the other end thereof; It may be formed; a spiral blade 353 formed on the inner peripheral surface of the pipe member 351.

As the inner diameter of the pipe member 351 gradually decreases from one end portion to the other end direction, it is possible to suppress the rapid exhaust gas from one end portion of the pipe member 351 toward the other end portion. The noise of the exhaust gas can also be reduced.

In addition, as the spiral blade 353 is formed on the inner circumferential surface of the pipe member 351, it is possible to more efficiently suppress the exhaust gas is rapidly discharged from one end of the pipe member 351 toward the other end. In addition, the flow length of the exhaust gas is long, so that the noise reduction effect of the exhaust gas can be increased.

One end of the inlet pipe 350, the upper and the lower side as shown in Figure 6, the receiving groove 360 in which one side and the other side receiving the edge of the first upper portion and the first lower accommodation space (162, 182) is open ) May be formed to a certain depth.

The receiving groove 360 may be formed inside the two walls 361 and 363 which protrude upward and forward and at the same time as the upper and lower ends of the inflow pipe 350 at predetermined intervals, respectively. A connection piece 365 having both ends integrally connected to the two walls 361 and 363 may protrude upward between the two central portions of the walls 361 and 363.

The connecting piece 365 is inserted into the grooves 367 and 369 formed at a predetermined depth in the upper and lower centers of the first upper and lower lower accommodating spaces 162 and 182, thereby the inflow pipe 350. It is possible to prevent the possibility of forward and reverse rotation by external force.

8 is a perspective view schematically illustrating the auxiliary inflow pipe 370, and FIG. 9 is a cross-sectional view taken along the line CC of FIG. 8.

Next, the auxiliary inlet pipe 370, for example, as shown in Figure 8 and 9, the upper end and the lower end is accommodated in the upper receiving space 160 and the lower receiving space 180, once An auxiliary pipe member 371 having an inner diameter gradually decreasing from the portion toward the other end portion, the plurality of exhaust holes 372 being formed at a predetermined interval on the other side; And a spiral blade (not shown) formed on an inner circumferential surface of the auxiliary pipe member 371.

As the plurality of exhaust holes 372 are formed in the other upper part of the auxiliary pipe member 371 or the other upper part and the lower part of the auxiliary pipe member 371, the exhaust gas passing through the auxiliary pipe member 371 is formed. Some are exhausted into the housing 10 through the plurality of exhaust holes 372, thereby lowering the pressure of the exhaust gas passing through the auxiliary pipe member 371, thereby significantly reducing the noise of the exhaust gas. It becomes possible.

As the inner diameter of the auxiliary pipe member 371 decreases gradually from one end to the other end, the exhaust gas is rapidly discharged from one end of the auxiliary pipe member 371 toward the other end. In addition, the noise of the exhaust gas can also be reduced.

In addition, as the spiral blade (not shown) is formed on the inner circumferential surface of the auxiliary pipe member 371, the exhaust gas is rapidly suppressed from one end of the auxiliary pipe member 371 toward the other end. In addition, the flow length of the exhaust gas can be increased, and the noise reduction effect of the exhaust gas can also be increased.

On one side of the auxiliary inlet pipe 370, the upper and lower sides of the receiving groove having one side and the other side open to receive the edges of the second upper and second lower accommodation spaces 164 and 184, as shown in FIG. 380 may be formed to a predetermined depth.

The accommodating groove 380 may be formed inside the two walls 381 and 383 which protrude upward and at the same time and extend forward and backward at one end above and below one end of the auxiliary inflow pipe 370, respectively. In addition, a connection piece 385 having both ends integrally connected to the two walls 381 and 383 may protrude upward between the two center portions of the walls 381 and 383.

The connecting piece 385 is inserted into the grooves 387 and 389 formed at predetermined depths in the upper and lower centers of the second upper and second lower accommodating spaces 164 and 184, whereby the auxiliary inflow pipe 370 ) Can be prevented from being rotated forward and backward by external force or the like.

10 is a cross-sectional view schematically illustrating a state in which the heat dissipation fins 170 are formed at predetermined intervals on the outer surfaces of the upper housing 110 and the lower housing 130.

Next, the upper housing 110 and the lower housing 130 is made by injection molding of aluminum, the upper housing 110 and the outer surface of the lower housing 130, as shown in Figure 10 the upper housing 110 ) And the heat dissipation fins 170 may be formed at predetermined intervals in the longitudinal direction of the lower housing 130.

When the upper housing 110 and the lower housing 130 are injection molded from aluminum, the high heat generated in the housing 10 may be radiated smoothly to the outside due to the high temperature exhaust gas flowing into the housing 10. In addition to the heat dissipation fins 170 formed on the outer surfaces of the upper housing 110 and the lower housing 130, the high heat generated in the housing 10 can be more smoothly dissipated to the outside. Of course, the strength of the housing 10 also has the advantage that can be greatly improved.

Next, although not shown in the drawings, for example, a sealing pad made of rubber material is provided between the lower edge of the upper housing 110 and the upper edge of the lower housing 130 coupled by the fastening member 15. It is good to be provided.

As the sealing pad is provided between the lower edge of the upper housing 110 and the upper edge of the lower housing 130, the exhaust gas introduced into the housing 10 is discharged into the upper housing 110 and the lower housing. There is an advantage that there is no fear of exposure to the outside through the gap between 130.

The present invention configured as described above is for the present vehicle because the housing 10 made of the upper housing 110 and the lower housing 130 is injection molded or press-molded with a material selected from engineering plastic, aluminum and titanium. In addition to reducing the size of the muffler 1, the noise reduction part 30 can be efficiently arranged in the housing 10 more efficiently in accordance with the engine exhaust characteristics without the need to weld-weld the housing 10. In addition, it is possible to use the final finished product in a simple assembly process of the fitting form, as well as the structure is simple and the number of processes is significantly reduced compared to the prior art has the advantage of minimizing the manufacturing cost accordingly.

1 is a perspective view schematically showing a vehicle muffler according to an embodiment of the present invention,

Figure 2 is an exploded perspective view of Figure 1,

3 is a cross-sectional view taken along line AA of FIG. 1,

4 is a perspective view schematically illustrating a state in which the upper housing of FIG. 2 is turned upside down;

FIG. 5 is a perspective view schematically illustrating the lower housing of FIG. 2;

6 is a perspective view schematically illustrating the inflow pipe,

7 is a cross-sectional view taken along the line BB of FIG. 6,

8 is a perspective view schematically illustrating the auxiliary inflow pipe,

9 is a cross-sectional view taken along the line C-C of FIG.

10 is a cross-sectional view schematically illustrating a state in which heat dissipation fins are formed at predetermined intervals on the outer surfaces of the upper and lower housings.

*** Explanation of symbols for main parts of drawing ***

One; Vehicle mufflers, 5; Inlet,

51; An upper inflow member, 53; Bottom inflow member,

7; Exhaust section 15; Fastening member,

151; Fixing bolt, 153; nut,

71; Upper exhaust member, 73; Lower exhaust member,

10; Housing 110; Upper Housing,

120; Upper receiving member 122; The first upper receiving member,

124; A second upper receiving member, 130; Lower Housing,

140; Lower receiving member, 142; The first lower receiving member,

144; A second lower receiving member, 150; Heat Resistant,

160; Upper receiving space, 162; First upper accommodation space,

164; A second upper receiving space, 180; Lower Receiving Space,

182; First lower receiving space, 184; 2nd lower space,

186; Third lower receiving space, 188; 4th lower space,

30; Noise reduction unit, 310; One side vortex member,

330; Other vortex members, 311 and 331; Body Part,

313, 333; Vortex wing, 350; Inlet pipe,

360, 380; Receiving grooves, 361, 363, 381, 383; Wall-Building Feature,

365, 385; Connecting pieces, 367, 369,387, 389; home,

370; Auxiliary inlet pipe.

Claims (7)

A housing provided at both sides of the inlet part and the exhaust part in which the exhaust gas flows in and out; A muffler for a vehicle comprising: a noise reduction unit provided in the housing to reduce noise of exhaust gas; The housing is composed of an upper housing and a lower housing coupled to the upper housing, the upper housing and the lower housing are injection molded or press-molded with an engineering plastic material, A heat resistant layer is formed on inner surfaces of the upper and lower housings, The heat-resistant layer is made of one or more selected from glass fibers, carbon fibers and polyimide, The noise reduction part includes one side and the other side vortex member which is fixed to the inlet and the exhaust part; An inlet pipe having both ends open in the upper housing and the lower housing so as to be positioned between the one side and the other vortex member; And an auxiliary inlet pipe having both ends opened in the upper housing and the lower housing so as to be positioned before and after the inflow pipe, respectively. Inside the upper housing and the lower housing, the upper and lower receiving members are formed vertically at regular intervals, the upper receiving space and the lower receiving space for accommodating the upper and lower ends of the inlet pipe and the auxiliary inlet pipe, respectively; The one side vortex member and the other side vortex member and one side and the other body is accommodated in the receiving groove formed in a predetermined depth in the inlet and exhaust portion; Is formed in a conical shape on the body, a plurality of one side and the other side vortex wing twisted at a predetermined angle; The inlet pipe is fixed to the upper end and the lower end is accommodated in the upper accommodating space and the lower accommodating space, the pipe member is gradually reduced in diameter from one end toward the other end direction; Is formed of a spiral blade formed on the inner peripheral surface of the pipe member, The auxiliary inlet pipe is fixed to the upper end and the lower end is accommodated in the upper accommodating space and the lower accommodating space, the inner diameter gradually decreases from one end toward the other end direction, the auxiliary pipe member is formed with a plurality of exhaust holes; A vehicle muffler comprising: an auxiliary spiral blade formed on an inner circumferential surface of the auxiliary pipe member. delete delete delete delete delete delete

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