KR200340730Y1 - Car muffler - Google Patents

Abstract

The present invention relates to a vehicle muffler that can significantly improve the noise efficiency while improving the conventional tuning muffler while the engine output is higher than the conventional tuning muffler. An automobile muffler according to the present invention is a means for controlling exhaust pressure by extending from the exhaust pipe in a hollow tube shape, and the exhaust pressure control plate having a plurality of exhaust pressure control plates formed with a plurality of exhaust holes at a predetermined point in the upper part thereof so as to be rotatable. Wealth; A hollow pipe formed by a mesh network, the mesh pipe providing a passage of the exhaust gas passing through the exhaust pressure adjusting unit, the sound absorbing unit surrounding the entire circumference of the mesh pipe and absorbing the exhaust sound, and one end of the exhaust pressure. The sound absorbing part extends from the adjusting part and the other end comprises a noise part comprising a casing connected to the exhaust port.

Description

Car muffler {Car muffler}

The present invention relates to an automobile muffler. More specifically, the present invention relates to an automobile muffler which can improve the noise efficiency while improving the conventional tuning muffler while making the engine output more than the conventional tuning muffler.

In general, a muffler is installed at the rear of an exhaust pipe connected to an exhaust manifold of an engine to reduce the exhaust noise by lowering the pressure of the exhaust gas discharged from the engine. The engine output sound attenuation method of such a muffler can be roughly classified into an inflatable, resonance, absorption, and partition type according to the principle, among which a bulkhead type is used for a conventional genuine product.

The bulkhead muffler installs a plurality of partitions inside the muffler, so that the bulkhead absorbs the exhaust sound while the exhaust gases pass between the partition walls, thereby producing noise ('noise' is used herein to mean 'noise elimination'). As a principle, while the noise effect is higher than other methods, there is a disadvantage that the output of the engine is lowered because the resistance to the flow of exhaust gas by the bulkhead is increased.

Recently, a tuning muffler has been spotlighted among car enthusiasts as a way to overcome the shortcomings of the bulkhead type muffler. Can be. Figure 1a is a cross-sectional view of a conventional tuning muffler, briefly explaining the configuration and operation of the tuning muffler with reference to the following.

As shown in FIG. 1A, a conventional tuning muffler 10 is fixed to an end of an exhaust pipe 7 connected to an engine, and an end thereof is provided at a casing 1 connected to an exhaust port, and is provided inside the casing 1 to be connected to an exhaust pipe 7 to allow exhaust gas to pass through. Perforated pipe 2 to provide a passage (4) and the sound absorbing material 6 is filled in the casing 1 to surround the perforated pipe 2.

Figure 1b is a perspective view of a perforated pipe, a perforated pipe 2 is a pipe having a plurality of holes 3 formed on the circumferential surface of the output sound generated from the engine, in particular, the high frequency is moved to the sound absorbing material 6 direction through the hole 3 is absorbed by the sound absorbing material Allow or attenuate. On the other hand, the perforated pipe 2 can be seen that the internal exhaust passage 4 is completely open to prevent the back pressure is generated when the exhaust gas discharged from the engine.

However, in the conventional tuning muffler 10 configured as described above, since there is no obstacle that prevents the exhaust gas inside the exhaust passage 4, the exhaust gas is discharged as it is along the arrow a direction, and the output of the engine is greatly improved. In addition to the gas output sound of the engine is also emitted without any obstacle, there is a problem that the output sound is too large to cause various damages by the output sound.

In addition, since the internal exhaust passage through which the exhaust gas passes is always in an open state, the engine combustion chamber temperature is lowered due to the outside air, thereby lowering the output of the engine.

The present invention is devised to overcome the disadvantages of the conventional tuning muffler as described above, the object of the present invention is to provide an automotive muffler that can increase the noise efficiency than the bulkhead muffler while outputting more than the conventional tuning muffler. will be.

Another object of the present invention is to provide an automobile muffler that prevents a decrease in engine output by solving a problem in which the combustion chamber temperature of the engine is lowered due to the absence of exhaust resistance in the muffler.

1A is a cross-sectional view of a conventional tuning muffler.

1B is a perspective view of a perforated pipe of a conventional tuning muffler.

Figure 2a is a cross-sectional view of one embodiment according to the present invention.

FIG. 2B is a sectional view taken along the line A-A of FIG. 2A;

Figure 2c is a front view of the exhaust pressure control plate of one embodiment according to the present invention.

Figure 3a is a perspective view of a mesh-like pipe of one embodiment according to the present invention.

Figure 3b is a block diagram of a mesh-like pipe of an embodiment according to the present invention.

Figure 4 is a perspective view of another embodiment of the present invention.

5 is a perspective view of another embodiment of the present invention.

Figure 6 is a perspective view of another embodiment of the present invention.

<Description of Major Reference Drawings>

20 exhaust pressure regulator, 21 exhaust pressure regulator, 22 mesh pipe, 23 sound absorbing part, 24 casing, 25 silencer, 26 exhaust pipe, 27 exhaust port, 28 exhaust hole, 29 tapered perforated pipe

An automobile muffler according to the present invention having the purpose as described above is a means for adjusting exhaust pressure by extending from an exhaust pipe connected to an engine exhaust manifold in a hollow tube shape. An exhaust pressure adjusting unit coupled to the pressure adjusting plate so as to be rotatable; A hollow pipe formed by a mesh network, the mesh pipe providing a passage of the exhaust gas passing through the exhaust pressure adjusting unit, the sound absorbing unit surrounding the entire circumference of the mesh pipe and absorbing the exhaust sound, and one end of the exhaust pressure. The sound absorbing part extends from the adjusting part and the other end comprises a noise part comprising a casing connected to the exhaust port.

In another aspect of the present invention, an automobile muffler according to the present invention is a hollow pipe formed by a mesh network, a mesh-like pipe that provides a passage of exhaust gas passing through an exhaust pipe connected to an exhaust manifold of an engine, and the mesh A sound absorbing portion configured to surround the entire circumference of the upper pipe to absorb the exhaust sound, and one end of the casing extending from the exhaust pressure pipe to surround the sound absorbing portion; Means for adjusting the exhaust pressure extending from the silencer in the shape of a hollow tube, the exhaust pressure adjusting unit coupled to the exhaust pressure control plate formed with the exhaust hole rotatably at a predetermined point in the upper portion thereof; And at least one other silencer having the same structure as the silencer and extending from the exhaust pressure adjusting unit.

The sound absorbing portion is formed by overlapping two or more sound absorbing materials having different materials, and the exhaust pressure regulating plate is preferably located at a portion close to the engine. In addition, the mesh spacing of the mesh-like pipe is preferably so close that the inside can not be seen visually through the gap.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the vehicle muffler according to the present invention. FIG. 2A is a cross-sectional view of an embodiment of the present invention, and FIG. 2B is a cross-sectional view of FIG. 2A.

As shown in Fig. 2A, the present embodiment is constituted by an exhaust pressure adjusting unit 20, one end of which is connected to an exhaust manifold of an automobile engine as a whole, and a silencer 25 connected to the other end of the exhaust pressure adjusting unit 20. The other end of the silencer 25 is connected to an exhaust port 27 for discharging the exhaust gas of the engine to the outside.

The exhaust pressure control unit 20 includes an exhaust pressure control plate 21 therein, and the exhaust pressure control plate 21 is rotatably coupled to a predetermined point on the upper portion of the exhaust pressure control unit 20. The exhaust pressure control plate 21 is preferably located at a point close to the engine. 2C is a front view of the exhaust pressure regulating plate 21, in which a plurality of exhaust holes 28 are perforated. In the exhaust pressure adjusting plate 21, as shown in FIG. 2C, a plurality of exhaust holes 28 having a small diameter may be formed, and one or two exhaust holes having a larger diameter may be formed.

The silencer 25 is constituted by a mesh pipe 22 providing a passage of exhaust gas at a central portion, a sound absorbing portion 23 surrounding the entire circumference of the mesh pipe 22, and a casing 24 surrounding the sound absorbing portion 23. The mesh pipe 22 is a component corresponding to the perforated pipe 2 of the conventional tuning muffler 10 shown in Figs. 1A and 1B, the perspective view of which is shown in Fig. 3A.

The perforated pipe 2 in the conventional tuning muffler 10 is formed by drilling a plurality of holes in the hollow tube, but the mesh-like pipe 22 in the present invention is a mesh formed by tightly weaving thin wires as shown in Fig. 3B. It is formed by rolling the sheet 22a in a cylindrical shape and fixing it by fixing means 22b at both ends thereof. The mesh spacing of the mesh sheet 22a is preferably so dense that the other side cannot be seen visually through the spacing. In the present invention, by replacing the conventional perforated pipe with the mesh pipe 22, the noise efficiency and the engine output can be increased at the same time, and the size of the mesh pipe 22 can be reduced, so that the size of the entire muffler can also be reduced.

The sound absorbing portion 23 is a portion for canceling the exhaust gas output sound of the engine. In this embodiment, three sound absorbing materials having different materials are superposed. That is, the sound absorbing portion 23 was formed by a three-layer structure of the sus wool 23a in contact with the mesh pipe 22, the ceramic wool 23b in the middle portion, and the rock wool 23c in the outermost portion. . Susoul 23a smoothes exhaust communication when inhaling exhaust sound, protects other sound absorbing materials, and maintains smooth exhaust sound even after long-term use. Ceramic wool 23b is a sound absorbing material with good heat resistance, moisture resistance, and excellent sound absorption. Rockwool 23c is also a very good sound absorbing material. It is apparent to those skilled in the art that the structure of the sound absorbing portion 23 is exemplary and the sound absorbing portion 23 can be configured using other sound absorbing materials.

On the other hand, since the mesh-like pipe 22 of FIGS. 3A and 3B is a flexible material, a problem may arise due to high heat of exhaust gas. In order to prevent this, it is also possible to insert and use the conventional perforated pipe 2 for reinforcement inside the mesh pipe 22. Since the hole of the conventional perforated pipe 2 is much larger than the hole of the mesh pipe 22, the hole of the mesh pipe 22 inside the muffler according to the present invention is not affected by the rigidity of the punch hole pipe 2 without affecting the noise performance of the present invention. Low rigidity is reinforced.

Referring to the operation of the present embodiment having the configuration as described above are as follows. When the exhaust gas discharged from the exhaust manifold of the engine flows into the exhaust pressure control unit 20, the exhaust pressure control plate 21 is inclined to the position as shown by dashed line 21 'in FIG. Inflow. On the other hand, the exhaust pressure regulating plate 21 serves to prevent the output of the engine combustion chamber is lowered due to the design of the straight pipe system without the exhaust resistance is lowered. The weight of the exhaust pressure control plate 21 may vary depending on the vehicle model. That is, in the case of a small car with a small engine power, the weight of the exhaust pressure control plate 21 should be reduced, whereas in the case of a medium and large car with a large engine power, the weight of the exhaust pressure control plate 21 should be relatively large.

The exhaust gas discharge sound (especially high frequency discharge sound) introduced into the silencer 25 is absorbed and eliminated by the sound absorbing unit 23 through the tight gap of the mesh pipe 22. The mesh pipe 22 increases the inflow of the exhaust sound into the sound absorbing portion 23 compared to the perforated pipe of the conventional tuning muffler, while reducing the exhaust sound much more efficiently by preventing the outflow of the exhaust sound that is not canceled from the sound absorbing portion 23. In addition, there is an effect that can increase the engine output compared to the perforated pipe. In the present embodiment, the sound absorbing portion 23 is formed by stacking sound absorbing materials having different characteristics, so that the noise efficiency can be increased rather than using one sound absorbing material.

4 is a perspective view of another embodiment of a vehicle muffler according to the present invention. Compared to the embodiment shown in FIG. 2A, another silencer 25 'is connected to the end of the silencer 25. FIG. The structure of the other silencer 25 'can be the same as the structure of the silencer 25 described above. Naturally, the noise efficiency can be increased by double the noise sections. Depending on the vehicle model or the preference of the automobile user, there may be a need for low noise, and in such a case, a muffler such as the embodiment shown in FIG. 3 is required. Furthermore, it may be possible to configure a muffler by connecting three or more silencers, and the exhaust pressure adjusting unit 20 may be additionally connected between the silencer and the silencer through FIG. 1A. In addition, it is also possible to provide a structure that can be easily removable a plurality of silencers and exhaust pressure control unit as described above to be able to be assembled and used according to the user's taste.

5 is another embodiment of the automobile muffler according to the present invention, which has a difference in the order of the silencer 25 and the exhaust pressure adjusting unit 20 from the embodiment shown in FIG. 4. That is, the exhaust manifold of the engine and the first noise unit 25 are connected, the exhaust pressure control unit 20 is connected to the first noise unit 25, and the second noise unit 25 'is connected to the exhaust pressure control unit 20 again. It is made up. The structure of the first noise section 25 and the second noise section 25 'can be the same as that of the silencer described with reference to FIG. 1A, and the structure of the exhaust pressure adjusting section 20 is the same as that of the exhaust pressure adjusting section of FIG. It can be done. As in the embodiment shown in Figure 4, it is possible to configure the muffler by additionally connecting the other silencer and the exhaust pressure adjusting unit.

Figure 6 is another embodiment of the automobile muffler according to the present invention, the muffler is configured by connecting the third noise portion 25 "after the second noise portion 25 'of the embodiment shown in Figure 4. However, this embodiment In the first noise portion 25 is composed of a mesh pipe according to the present invention, the second noise portion 25 'and the third noise portion 25 "is configured using a conventional perforated pipe. Although the embodiment of FIG. 6 functions substantially similar to the embodiment of FIG. 4, it shows one example taken to precisely tune the exhaust sound and the output according to the vehicle model. Therefore, it can be easily carried out by those skilled in the art to tune by properly arranging the silencer and the conventional silencer according to the present invention in order to achieve the desired purpose.

On the other hand, in the exhaust pressure control unit 20 shown in FIG. 2A, noise may collide with the casing during operation of the exhaust pressure control plate 21 installed therein. As an example for removing this noise, the tapered perforated pipe 29 was inserted into the mesh pipe 22 as shown in FIG. The shape of the tapered perforated pipe 29 is illustrated in FIG. Since the shape of the perforated pipe shown in FIG. 1B is tapered so that the outlet is narrower than the inlet, the exhaust gas entering the inlet receives more pressure than a straight pipe when it is ejected from the outlet. Will be able to. That is, the tapered perforated pipe 29 of the present embodiment serves to control the pressure at which the exhaust gas is ejected to prevent the engine side temperature from being lowered by the temperature of the muffler outside air. As a result of the experiment, it was confirmed that the temperature of the engine did not decrease even without the exhaust pressure control unit 20 of FIG. 2A.

The length of the tapered perforated pipe 29 of Fig. 8 was about one third of the length of the mesh pipe 22, and the length can be arbitrarily determined. Although the installation position can be arbitrarily determined, it is preferable to install at the engine side end.

The various embodiments described above should not be construed as limiting the technical scope of the present invention. Since the technical idea according to the present invention may be modified in various forms, the technical scope should be determined by a reasonable interpretation of the utility model registration claims.

According to the automobile muffler according to the present invention, while maintaining or improving the high output which is an advantage of the conventional tuning muffler, the noise efficiency can be improved over the conventional bulkhead muffler, and the outside air is introduced into the engine direction from the inside of the muffler This prevents the output from being lowered due to the engine temperature drop. In addition, the noise portion can be extended or reduced in accordance with the taste of the car model or the car user has the effect of increasing the choice.

Claims (6)

In the muffler connected to the exhaust pipe connected to the exhaust manifold of the automobile engine to cancel the exhaust sound, Exhaust pressure adjusting means for adjusting the exhaust pressure by giving resistance to the exhaust gas exhausted from the exhaust pipe; A hollow pipe connected to the exhaust pressure adjusting means, the mesh pipe providing a passage of the exhaust gas passing through the exhaust pressure adjusting means, a sound absorbing portion surrounding the entire circumference of the mesh pipe to absorb exhaust sound, and one end An automobile muffler extending from the exhaust pressure regulating portion and surrounding the sound absorbing portion, the other end comprising a noise means composed of a casing connected to the exhaust port. The method of claim 1, The sound absorbing portion is formed by overlapping two or more sound absorbing materials of different materials, automobile muffler. According to claim 1, The exhaust pressure adjusting means, An automobile muffler, comprising: an exhaust pressure control plate coupled to a predetermined point on an upper portion of the inner part thereof so as to be rotatable back and forth in the exhaust direction to control the pressure at which the exhaust gas is ejected. According to claim 1, The exhaust pressure adjusting means, A perforated pipe inserted into the mesh pipe of the noise means, the shape of which is tapered so that the outlet is narrower than the inlet, so that the exhaust gas is ejected from the outlet to control the automobile muffler. The method according to any one of claims 1 to 4, And at least one other silencer extending from an exhaust port of the silencer and having the same configuration as the silencer. The method of claim 5, An automobile muffler, further comprising another exhaust pressure adjusting means having the same configuration as the exhaust pressure adjusting means between the noise means and the other noise means.