KR20020055506A - Exhaust system of vehicle - Google Patents

Abstract

PURPOSE: Stress concentrated in a bent portion of an exhaust pipe is distributed to improve durability of an automobile. CONSTITUTION: In an exhaust pipe having a silencer(20) to reduce temperature and pressure of an exhaust gas, the silencer comprises a vibration absorbing member to prevent disorder in a bent portion of the exhaust pipe using an elastic force. The vibration absorbing member comprises a first flange(22) formed in a certain interval with an inner side of the silencer. A second flange(24) is formed to face the first flange in a certain interval. An elastic member(26) is installed in the second flange to move the exhaust pipe variably.

Description

Vehicle exhaust system {EXHAUST SYSTEM OF VEHICLE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust device of an automobile, and more particularly, to an exhaust device of an automobile capable of preventing defects in the exhaust pipe due to external shocks such as vibration of the vehicle body.

In general, the exhaust device is a device for discharging the combustion gas generated in the process of burning fuel inside the engine to the outside.

1 is a perspective view showing an exhaust device of a vehicle according to the prior art.

As shown in FIG. 1, an exhaust manifold 12 connected to the engine 10 to collect combustion gas of a cylinder and a portion of the exhaust manifold 12 are installed as a harmless substance. A catalytic converter 14 for oxidizing and reducing, and an exhaust gas connected to one portion of the catalytic converter 14 to exhaust the exhaust gas from the exhaust manifold 12 and to dissipate a part of the heat generated from the exhaust gas. It consists of a pipe 16 and a silencer 20 connected to one end of the exhaust pipe 16 to reduce exhaust noise by lowering the temperature and pressure of the exhaust gas.

Here, between the exhaust manifold 12 and the silencer 20, the auxiliary silencer having a simple structure and low cost to prevent corrosion of the silencer 20 to prolong its life and to reduce maintenance costs ( 18) is installed.

However, the exhaust device of a vehicle according to the related art as described above is generally bent by the vibration of the vehicle, such that the part of the exhaust pipe 16 connected to the muffler 20 is severely bent due to layout or the like. There is a problem in that the stress is concentrated on the part and the exhaust pipe 16 is broken or broken.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an exhaust device of a vehicle, which is remarkably improved by dispersing stress concentrated on a bent portion of an exhaust pipe due to vibration of a vehicle. .

1 is a perspective view showing an exhaust device of a vehicle according to the prior art,

2 is a cross-sectional view showing a part of an exhaust system of a vehicle according to the present invention;

3 is a cross-sectional view showing the main part of the exhaust system of a vehicle according to the present invention.

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

12 exhaust exhaust manifold 14 catalytic converter

16: exhaust pipe 20: silencer

20a: Silencer Case 20b: Plate

22: first flange 24: second flange

26: elastic member

The present invention for achieving the above object is the exhaust pipe for guiding the exhaust gas generated during the combustion of fuel in the engine to the outside, one end of the exhaust pipe is installed so as to reduce the temperature and pressure of the exhaust gas In the exhaust device of a vehicle equipped with a silencer, the silencer is characterized in that it comprises a vibration absorbing means for preventing a defect in the bent portion of the exhaust pipe by an external impact, such as vibration of the vehicle body using the elastic force. Done.

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

2 is a cross-sectional view showing a part of the exhaust system of a vehicle according to the present invention, Figure 3 is a cross-sectional view showing the main part of the exhaust system of the vehicle according to the invention.

As shown in FIG. 2 or FIG. 3, an exhaust system of an automobile according to the present invention includes an exhaust manifold 12 connected to one portion of an engine 10 so as to collect combustion gas of a cylinder, and the exhaust manifold 12. Exhaust gas passing through the catalytic converter 14 and the catalytic converter 14 installed in one portion of the exhaust manifold 12 so as to oxidize and reduce harmful substances in the exhaust gas discharged from the exhaust gas. An exhaust pipe 16 connected to one portion of the catalytic converter 14 so as to discharge the exhaust gas emitted from (12), and one end of which is bent for reasons of layout or the like, and an intermediate portion of the exhaust pipe 16; The auxiliary silencer 18 and the bent end of the exhaust pipe 16 are installed so as to penetrate, and composed of a silencer 20 that attenuates exhaust noise by lowering the temperature and pressure of the exhaust gas.

Here, the silencer 20 is generally made of a cylindrical silencer case 20a made of a steel plate of about 1mm, the outer shape is made of a plate 20b that blocks both sides of the silencer case 20a, The interior is divided into several spaces.

In particular, the silencer 20 is provided with vibration absorbing means to prevent the bent portion of the exhaust pipe 16 from being broken or broken by the vehicle body vibration.

The vibration absorbing means is formed on the inner circumferential surface of the muffler case 20a and horizontally with the plate 20b of the side through which the exhaust pipe 16 penetrates, and the first flange 22 having a central portion thereof open, The inner peripheral surface of the first flange 22 and the silencer case 20a is spaced apart from the inner circumferential surface of the penetrated end of the exhaust pipe 16 and is horizontal to the first flange 22. Elastically installed in the second flange 24 to prevent the exhaust pipe 16 from being broken or broken from its vibration by variably flowing the second flange 24 and the exhaust pipe 16. 26).

The elastic member 26 may include a first spring 26a connected to one side of the second flange 24, a plate 20b on the side of the exhaust pipe 16, and the second flange 24. A second spring 26b connected to an upper surface of the second silencer case 20a and an inner circumferential surface of the muffler case 20a, and a third surface connected to the other surface of the second flange 24 and one side of the first flange 22. It consists of a spring 26c.

Here, the elastic member 26 is provided in plurality at regular intervals so that the exhaust pipe 16 is more variably flowable so that the exhaust pipe 16 does not break or break.

On the other hand, there is no bar shown in the embodiments and drawings of the present specification, the elastic member 26 is a well-known elastic member that is generally used can of course be used.

In addition, between the silencer case 20a and the exhaust pipe 16, an airtight holding means for maintaining the airtight between the two irrespective of the flow of the exhaust pipe 16 is added.

The exhaust device of the vehicle according to the present invention configured as described above is operated as follows.

The exhaust pipe 16 passes through the plate 20b of the muffler 20, and the elastic member 26 is connected to the first flange 22, the second flange 24, and the muffler case 20a, respectively.

Therefore, when the vehicle runs in the above state, the exhaust pipe 16 is variably flown by the elastic member 26.

In the exhaust device of the vehicle according to the present invention constructed and operated as described above, even if an external shock such as vibration of the vehicle body occurs, a defect occurs in the bent connection portion between the exhaust pipe and the silencer by absorbing these shocks by the elastic member installed in the silencer. There is an effect to prevent.

Claims (4)

In an exhaust device of a vehicle provided with an exhaust pipe for guiding the exhaust gas generated in the process of burning fuel in the engine to the outside, and a silencer that is installed so that one end of the exhaust pipe passes through to reduce the temperature and pressure of the exhaust gas. , The silencer includes vibration absorbing means for preventing a defect from occurring in the bent portion of the exhaust pipe by an external impact such as vibration of the vehicle body by using the elastic force. The method of claim 1, The vibration absorbing means may face the first flange formed at an inner circumferential surface of the muffler at a predetermined distance from the inner surface of the muffler, and face the first flange at an end of the outer circumferential surface of the exhaust pipe passing through the silencer. And a second flange formed and an elastic member installed on the second flange to variably flow the exhaust pipe. The method of claim 2, The elastic member may include a first spring connected to one side of the second flange and one side of the silencer, a second spring connected to an upper side of the second flange and an inner circumferential surface of the muffler, and the other side of the second flange. And a third spring connected to one side of the first flange. The method of claim 2 or 3, The exhaust member of the vehicle, characterized in that a plurality of elastic members are installed at a predetermined interval.