KR20120137094A

KR20120137094A - Muffler for vehicle

Info

Publication number: KR20120137094A
Application number: KR1020110056417A
Authority: KR
Inventors: 전재희; 유영춘; 한학손
Original assignee: 현대자동차주식회사; 기아자동차주식회사
Priority date: 2011-06-10
Filing date: 2011-06-10
Publication date: 2012-12-20

Abstract

PURPOSE: A silencer for vehicles is provided with improved sound absorption properties by installing a sound absorbing material in a chamber where outlet and middle pipes pass through. CONSTITUTION: A silencer(100) for vehicles comprises a housing(110), an inlet pipe(120), an outlet pipe(140), and a middle pipe(130). The inlet pipe is inserted into the housing to guide exhaust gas, and installed by penetrating baffles. The outlet pipe is inserted into the housing to discharge exhaust gas, and installed by penetrating the baffles. The middle pipe is placed inside the housing to form an exhaust path between the inlet and outlet pipes. The middle pipe is installed through the baffles. A sound absorbing material(150) is filled inside a chamber where the middle and outlet pipes pass through.

Description

Automotive Silencer {MUFFLER FOR VEHICLE}

The present invention relates to a vehicle silencer, and more particularly, the pipe structure and the exhaust path of the housing are simple, which has the advantages of reducing the back pressure and improving the engine output, and reducing the cost and weight while improving the number of parts, and improving the exhaust airflow sound. The branch relates to a vehicle silencer.

In general, an exhaust system for discharging exhaust gas generated from an engine of a vehicle is provided with a muffler capable of attenuating exhaust noise on an exhaust pipe for guiding exhaust gas to the rear side of the vehicle.

Such a muffler lowers the exhaust noise by lowering the temperature and pressure of the exhaust gas discharged from the engine, thereby reducing the exhaust booming component through expansion, contraction, and interference effects of the exhaust gas.

1 is a cross-sectional view showing a conventional silencer structure, Figure 2 is a perspective view showing the structure of the inlet, outlet pipe and the baffle in the conventional silencer, as shown, the conventional silencer 10 is a sealed housing of a predetermined volume (11) The inlet and outlet pipes 14 and 15 through which the exhaust gas passes are inserted.

In this structure, the exhaust gas introduced into the housing 11 through the inlet pipe 14 flows along the exhaust path set in the housing and is discharged through the outlet pipe 15 in a state in which pressure and noise are reduced.

One or more baffles 12a, 12b and 12c are installed in the housing 11 of the muffler 10 in order to increase the attenuation effect of the exhaust noise. 13c, 13d).

As a result, while the exhaust gas passes through the chambers 13a, 13b, 13c, and 13d in the housing 11, noise may be gradually reduced due to interference of sound waves, reduction of pressure fluctuations, and reduction of exhaust temperature.

Referring to FIG. 1, the interior of the housing 11 is divided into four chambers 13a, 13b, 13c, and 13d by three baffles 12a, 12b, and 12c, and an outlet pipe together with an inlet pipe 14. 15 is provided to penetrate the baffle inside the housing.

The inlet pipe 14 and the outlet pipe 15 have a structure in which a plurality of perforations 14a, 15a are formed in a predetermined section, and each of the baffles 12a, 12b, 12c also has a chamber 13a, 13b, 13c, 13d. It has a structure in which a plurality of perforations 12d for communicating the liver are formed.

In the conventional silencer 10, a long U-shaped outlet pipe 15 is applied to improve vehicle quietness when idle, and various structures for reducing exhaust noise have been applied.

First, the U-shaped outlet pipe 15 is provided with a variable valve 166 for varying the flow path area.

The variable valve 16 is configured to open and close the flow path in the pipe according to the pressure of the exhaust gas, and initially closes the flow path for noise isolation, and in the high speed region of the engine, opens the flow path by the exhaust gas pressure to lower the back pressure. Increase engine power.

In addition, a double pipe structure is applied to a predetermined section of the outlet pipe 15, and a separate pipe 17 is additionally installed to surround the outside of the outlet pipe 15, and the outlet pipe 15 and the pipe 17 outside the outlet pipe 15. The sound absorbing material 18 is provided in between.

When the double pipe structure is applied, the sound absorbing material 18 is disposed around the exhaust gas passage, thereby reducing noise.

However, in the structure of the silencer 10 as described above, due to the application of the U-shaped outlet pipe 15 and the variable valve 16, the pipe structure and the exhaust path in the housing 11 are complicated, and the back pressure is excessive to lower the engine output. There is a problem.

In addition, the variable valve 16 and the double pipe structure have a problem of excessive parts, cost and weight increase compared to the noise reduction effect.

Therefore, the present invention has been created to solve the above problems, compared with the conventional pipe structure and exhaust path in the housing has the advantage of reducing the back pressure and the engine output, and reduce the cost and weight, while reducing the number of parts, It is an object of the present invention to provide a vehicle silencer having advantages such as improved exhaust airflow noise.

In order to achieve the above object, the present invention, the interior space is divided into a plurality of chambers by the baffle housing; An inlet pipe inserted into the housing to allow exhaust gas to flow in and installed through the baffle; An outlet pipe inserted into the housing to discharge exhaust gas and installed through the baffle; And an intermediate pipe disposed inside the housing so as to form an exhaust path between the inlet pipe and the outlet pipe and installed through the baffle, wherein the sound absorbing material is filled in the chamber through which the intermediate pipe and the outlet pipe pass in common. It provides a vehicle silencer, characterized in that configured.

Here, the inlet pipe is preferably extended to pass through the interior of the chamber through which the intermediate pipe and the outlet pipe pass in common.

In addition, the sound absorbing material is preferably filled in the entire space in the chamber through which the intermediate pipe and the outlet pipe pass in common.

In addition, as an embodiment of the present invention, the first, second and third baffles are installed inside the housing so that the interior space of the housing is partitioned into first, second, third and fourth chambers, and the outlet pipe is the entire baffle. The intermediate pipe is installed to penetrate through the first and second baffles while passing through all of them, and the inlet portion of the intermediate pipe is positioned in the third chamber, and the outlet portion of the intermediate pipe is located in the first chamber.

Here, the inlet pipe is preferably installed so as to pass through all the baffles so that the outlet portion of the inlet pipe is located inside the fourth chamber.

In addition, it is preferable that the intermediate pipe and the outlet pipe extend in a straight line to be arranged side by side.

Accordingly, in the vehicle silencer of the present invention, instead of eliminating the long U-shaped outlet pipe, a straight exit pipe and an intermediate pipe are installed in a side-by-side direction, and the sound absorbing material is provided inside the chamber through which the outlet pipe and the intermediate pipe pass in common. The pipe structure in the housing can be simplified, and the sound absorbing performance can be reinforced by installing sound absorbing material in the chamber, which reduces back pressure and improves engine power, reduces parts count, reduces costs, and reduces weight, and improves exhaust airflow. And the like.

1 is a cross-sectional view showing a conventional silencer structure.
Figure 2 is a perspective view showing the structure of the inlet, outlet pipe and baffle in the conventional silencer.
3 is a cross-sectional view showing a vehicle silencer according to an embodiment of the present invention.
Figure 4 is a perspective view showing the assembled state of the pipe, baffle, sound absorbing material in a vehicle silencer according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

The present invention relates to a vehicle silencer, comprising: a housing in which an inner space is divided into a plurality of chambers by a baffle; An inlet pipe inserted into the housing to allow exhaust gas to flow in and installed through the baffle; An outlet pipe inserted into the housing to discharge exhaust gas and installed through the baffle; And an intermediate pipe disposed inside the housing so as to form an exhaust path between the inlet pipe and the outlet pipe and installed through the baffle, wherein the sound absorbing material is filled in the chamber through which the intermediate pipe and the outlet pipe pass in common. It is characteristic in that it is constructed.

Here, the inlet pipe is extended to pass through the chamber in which the intermediate pipe and the outlet pipe pass in common, and the sound absorbing material is filled in the entire space in the chamber through which the filling pipe and the outlet pipe pass in common.

3 is a cross-sectional view showing a vehicle silencer according to an embodiment of the present invention, Figure 4 is a pipe and baffle installed inside the housing in the vehicle silencer according to an embodiment of the present invention, It is a perspective view which shows the assembly state of a sound absorption material.

As shown, the vehicle silencer 100 of the present invention includes a sealed housing 110 having a predetermined volume to allow exhaust gas to pass therethrough, and a plurality of baffles 111, 112, and 113 are installed inside the housing 110 to allow the inside of the housing. Space is partitioned into a plurality of chambers 114, 115, 116, 117 by the baffles.

In an embodiment of the present invention, a total of three baffles 111, 112, and 113, that is, first, second, and third baffles may be installed in the housing 110, and thus, the interior space of the housing may include four chambers 114, 115, 116, and 117. It may be partitioned into first, second, third and fourth chambers.

The baffles 111, 112, and 113 serve to partition the inner space of the housing 110 and support the pipes 120, 130, and 140 inserted into the housing.

In addition, the inlet pipe 120 through which the exhaust gas is introduced and the outlet pipe 140 through which the exhaust gas is discharged are installed in the housing 110, and the inlet and outlet pipe 140 of the inlet pipe 120 are installed. The outlet part is disposed on one side and the other side of the housing so as to be connected to an external exhaust pipe.

In addition, an intermediate pipe 130 is formed in the housing 110 to form an intermediate exhaust path between the inlet pipe 120 and the outlet pipe 140. Thus, the exhaust path of the pipe in the housing 110 is the inlet pipe. 120, the intermediate pipe 130 and the outlet pipe 140 are routed, and exhaust gas entering the inlet pipe 120 is discharged to the outside through the outlet pipe 140 through the intermediate pipe 130.

In the present invention, the inlet pipe 120, the intermediate pipe 130, and the outlet pipe 140 are all installed in a straight line in the housing 110, three pipes are arranged side by side in the housing, the inlet pipe 120 ) And the intermediate pipe 130, and between the intermediate pipe 130 and the outlet pipe 140, the exhaust gas flow direction of the flow path in the pipe is opposite to each other.

That is, the exhaust gas passing through the inlet pipe 120 flows in the reverse direction in the intermediate pipe 130, and the exhaust gas passing through the intermediate pipe 130 flows in the reverse direction from the outlet pipe 140 again. .

In this way, instead of eliminating the U-shaped outlet pipe that causes excessive back pressure and lowered engine output, an outlet pipe 140 extending in a straight structure is provided, but between the inlet pipe 120 and the outlet pipe 140. The intermediate pipe 130 is arranged to simplify the pipe structure and the exhaust path.

Instead of the long U-shaped outlet pipe, the outlet pipe 140 is disposed in a straight line and the intermediate pipe 130 is disposed side by side.

In addition, unlike the conventional structure shown in FIG. 1, the inlet pipe 120 extends long enough to penetrate through each of the baffles 111, 112, and 113 so that the outlet part is located inside the fourth chamber 117 at the far end, and the intermediate pipe 130 is It is installed to penetrate the first and second baffles (111, 112) so that the inlet portion is located in the third chamber 116, the outlet portion is located in the first chamber (114).

That is, the intermediate pipe 130 is installed to connect between the third chamber 116 and the first chamber 114.

In addition, the outlet pipe 140 also penetrates through each of the baffles (111, 112, 113) is extended to be inserted so that the inlet portion is located inside the first chamber 114 of the opposite end.

In this structure, a plurality of perforations 111a, 112a, and 113a are formed in each of the baffles 111, 112, and 113 to communicate between the chambers, and the inlet pipe 120, the outlet pipe 140, and the intermediate pipe 130 are formed in a predetermined section. Perforations 120a, 130a, and 140a are formed.

As an example, the inlet pipe 120 may be formed with a plurality of perforations (120a) in the section passing through the second chamber 115 and the third chamber 116, the intermediate pipe 130 and the outlet pipe 140 A plurality of perforations 130a and 140a may be formed in a section passing through the second chamber 115.

On the other hand, in the silencer 100 of the present invention, the sound absorbing material 150 is filled and installed in the entire space in the chamber through which the pipe passes, wherein the sound absorbing material 150 is a material such as glass wool (glass wool) with excellent sound absorption and sound insulation performance Can be used.

In a preferred embodiment, the sound absorbing material 150 may be installed in the interior space of the chamber through which the inlet pipe 120, the intermediate pipe 130, and the outlet pipe 140 pass in common, as shown in FIGS. 3 and 4. Likewise, the first baffle 111 and the second baffle 112 may be installed inside the second chamber 115 to be partitioned and set.

As described above, in the present invention, the sound absorbing material 150 is filled in the entire space in the specific chamber 115, so that the double pipe structure as in the related art can be eliminated, and the sufficient sound absorption performance can be secured, thereby improving the overall noise reduction performance of the silencer. .

In addition, by filling the sound absorbing material 150 in the entire space of the chamber 115 between the baffles 111 and 112, the exhaust airflow sound can be reduced. In particular, as the sound absorbing material greatly improves the noise reduction performance, the flow path in the pipe in the low speed and low power section is increased. It is possible to eliminate the conventional variable valve to cut off the noise.

In addition, the removal of the U-shaped outlet pipe and the variable valve which have a complicated flow path structure provides the advantage of improving the output by reducing the back pressure, and reducing the cost by simplifying the internal structure, removing the variable valve, and removing the double tube. And weight reduction effects can be obtained.

In this way, according to the silencer described above, the pipe structure in the housing is simplified, and the sound absorbing performance is reinforced by installing sound absorbing material in the chamber, so that the back pressure is reduced, the engine output is improved, the number of parts is reduced, the cost is reduced, the weight is reduced, and the exhaust airflow The object of the invention, such as improvement, can be achieved.

The embodiments of the present invention have been described in detail above, but the scope of the present invention is not limited to the above-described embodiments, and various modifications of those skilled in the art using the basic concepts of the present invention defined in the following claims and Improved forms are also included in the scope of the present invention.

100: silencer 110: housing
111: first baffle 112: second baffle
113: third baffle 114: first chamber
115: second chamber 116: third chamber
117: fourth chamber 120: inlet pipe
130: middle pipe 140: outlet pipe
150: sound absorbing material

Claims

A housing in which the inner space is divided into a plurality of chambers by a baffle;
An inlet pipe inserted into the housing to allow exhaust gas to flow in and installed through the baffle;
An outlet pipe inserted into the housing to discharge exhaust gas and installed through the baffle; And
An intermediate pipe disposed inside the housing and installed through the baffle to form an exhaust path between the inlet pipe and the outlet pipe;
Includes, the vehicle silencer, characterized in that the sound absorbing material is filled in the chamber through which the intermediate pipe and the outlet pipe pass in common.

The method according to claim 1,
The inlet pipe is a vehicle silencer, characterized in that extending to pass through the interior of the chamber through which the intermediate pipe and the outlet pipe in common.

The method according to claim 1 or 2,
Sound absorbing material is a vehicle silencer, characterized in that filled in the entire space in the chamber through which the intermediate pipe and the outlet pipe in common.

The method according to claim 1 or 2,
First, second, and third baffles are installed in the housing, and the interior space of the housing is partitioned into first, second, third, and fourth chambers.
The outlet pipe passes through the entire baffle and the intermediate pipe is installed to penetrate the first and second baffles, such that an inlet portion of the intermediate pipe is located in the third chamber and an outlet portion of the intermediate pipe is located in the first chamber. Vehicle silencer, characterized in that.

The method of claim 4,
The inlet pipe is installed to penetrate all the baffles so that the outlet portion of the inlet pipe is characterized in that located inside the fourth chamber.

The method of claim 4,
Sound absorbing material is installed in the second chamber, characterized in that the vehicle silencer.

The method according to claim 1,
The intermediate pipe and the outlet pipe is a vehicle silencer, characterized in that arranged in parallel to extend in a straight line.