KR100925928B1 - Variable complex muffler typed exhaust system in vehicle - Google Patents

Abstract

The exhaust device of the present invention comprises a catalytic converter 2, a center silencer 3 and a main silencer 4 sequentially from the engine side on an exhaust pipe 1 connected to the engine and leading to the outside. The exhaust gas flow path passing through the main silencer 4 partitioned by the first, second, and third chambers 5a, 5b, and 5c by arranging the partitions 7a and 7b into the inner space is exhaust gas. The exhaust gas is introduced into the first, second, and third chambers 5a, 5b, and 5c using the phosphorus tube 8 through which the gas is introduced, and the variable valve on the side of the first chamber 5a using the long tail pipe 9 is provided. While exhausting the exhaust gas introduced by using (13) to the third chamber 5c and partially discharging it into the second chamber 5b, the second and third chambers 5b and 5c are again passed through the first chamber 5a. By forming a path to pass through, by reducing the low-frequency noise of the exhaust gas has a feature that can reduce the exhaust discharge sound emitted to the outside 5db ~ 7db.

Variable, silencer, exhaust

Description

Variable complex muffler typed exhaust system in vehicle

TECHNICAL FIELD The present invention relates to a vehicle exhaust system, and more particularly, to an exhaust system of a vehicle having a variable compound silencer.

In general, the exhaust device reduces the exhaust noise by lowering the temperature and pressure of the exhaust gas discharged from the engine, reduces the pollutants, and then acts to discharge it to the outside.

Such an exhaust device not only discharges the exhaust gas into the atmosphere but also serves to increase the engine power to facilitate the performance of the engine with the increased power.

Such exhaust devices are usually equipped with various devices to reduce pollutants, noise and back pressure on the exhaust pipes connected to the exhaust manifold mounted on the engine, that is, by installing WCC and UCC type catalyst from the engine side to reduce the pollutants Then, the center silencer and the main silencer are installed to reduce the noise and back pressure, and to be discharged to the outside through the tail pipe.

In addition, as a high output engine is used, which forms a large back pressure due to the explosion sound increase, various techniques for improving the performance of the exhaust system are applied.
For example, the muffler is designed to optimize the case thickness design considering the stiffness, weight and cost of the explosion sound, as well as to reduce the radiation noise caused by the passing exhaust gas, to prevent the best thermal damage to the surrounding area, and to reduce the air emission noise. It is developed to achieve low back pressure.

However, the technique for improving the performance of the exhaust system has a limitation as various methods and devices are used to improve the fuel economy of the engine.
For example, the application of a damper clutch to improve fuel efficiency in response to lowering the operating RPM of the engine or lowering the idle RPM will excessively increase the exhaust booming noise.

As such, the engine-side change factor applying the ECU, the TCU, and the damper clutch, or the like, may reduce exhaust system performance, that is, increase idle booming or exhaust oscillation booming, and as an example of an exhaust system component to prevent such a phenomenon, Additional design changes, such as reducing the tail pipe thickness or dualizing the internal structure of the silencer, have the side of reducing engine output and increasing the cost and weight of the exhaust system.

Accordingly, the present invention has been made in view of the above, and an object thereof is to reduce an oscillation booming noise of an engine by increasing a capacity of a rear end silencer connected to a tail pipe installed at an end of an exhaust device.

In addition, the exhaust device of the present invention increases the silencer capacity without reducing the trunk room size due to the silencer where the tail silencer is connected to the rear end silencer, and also prevents the temperature increase of the trunk room and rear bumper area due to the exhaust gas passing through the silencer. The purpose is to make it possible.

The present invention for achieving the above object is an exhaust pipe is installed so that the exhaust device of the vehicle collects the exhaust gas generated in the engine to discharge to the outside,

A catalytic converter mounted to the exhaust pipe and positioned close to the engine,

A center silencer mounted on an exhaust pipe at a distance from the catalytic converter to reduce noise, and a main silencer mounted on an end of the exhaust pipe to discharge the exhaust gas to the outside. In
The main silencer includes a housing padded with an insulating mat as its inner space, partition walls arranged at intervals such that the inner space of the housing is partitioned into first, second, and third chambers, and exhaust gas introduced through the connected exhaust pipe. An in-tube leading to reach the gas to the third chamber, and exhaust gas is introduced from the first chamber through the variable valve to the second and third chambers, and then back to the first chamber, and then the exhaust is passed through the second and third chambers. It is characterized by consisting of a long tail pipe for discharging the exhaust gas toward the pipe.

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The housing is formed of upper and lower cases which are formed to be bent at equal intervals and are formed to be bent and separated from each other. The narrow and small thickness is formed, and the inlet portion forms a deformed portion that is inclined in the width direction, and the upper and lower cases form a curved forming portion that is bent at equal intervals.

In addition, the in-tube has a plurality of discharge holes are formed to be partially discharged while the exhaust gas introduced through the exhaust pipe is inclined through the first chamber section, a plurality of discharged to be partially discharged again through the second chamber section. Holes are formed.

The long tail pipe includes an inlet tube for introducing gas introduced through the variable valve in the first chamber section toward the second and third chambers, a connecting tube connected to the inlet tube and positioned in the second chamber section, and the connection. It is connected to a tube and consists of a tail tube which discharges gas through a 1st chamber, and a 2nd and 3rd chamber.

According to the present invention, while reducing the engine's oscillation booming noise by increasing the capacity of the rear end silencer installed at the end of the exhaust system, it does not reduce the trunk room size due to the position of the silencer, as well as exhaust gas passing through the silencer. This also prevents the temperature increase in the trunk room and rear bumper areas.

In addition, the present invention increases the capacity of the rear end silencer installed at the end of the exhaust system, thereby reducing the engine bouncing noise by about 5dB to 7dB, and when the damper clutch for reducing fuel consumption, the effect can be reduced by about 7dB. do.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the exemplary embodiments of the present invention may be embodied in various different forms, one of ordinary skill in the art to which the present invention pertains may be described herein. It is not limited to the Example to make.

Figure 1 shows the configuration of the exhaust system of a vehicle equipped with a variable compound silencer according to the present invention, the exhaust device of the present invention is equipped with a catalytic converter (2) located close to the engine, the exhaust gas to the outside It consists of an exhaust pipe 1 which is connected to discharge and a center silencer 3 and a main silencer 4 which are sequentially mounted on the exhaust pipe 1 so as to be located close to the engine side.

Here, the main (muffler) 4, the exhaust outside the exhaust gas along the long tail pipe to reduce the low frequency to reduce the exhaust discharge sound 5db ~ 7db, and insulated into the case inside the long tail pipe By filling the mat to block the external emission of the exhaust gas heat passing through, it acts to prevent damage by the exhaust radiation heat around the silencer.

To this end, the main silencer 4 includes a housing 5 which forms an internal space through which exhaust gas is introduced and discharged, and an internal space of the housing 5 includes first, second, and third chambers 5a, Partition walls 7a and 7b arranged at intervals to be partitioned into 5b and 5c, phosphorus tube 8 and a channel which lead exhaust gas introduced through the connected exhaust pipe 1 to reach the third chamber 5c. After exhaust gas flows from the first chamber 5a, the second and third chambers 5b and 5c are turned back to the first chamber 5a, and then the second and third chambers 5b and 5c are passed through the exhaust pipe 1. It consists of a long tail pipe (9) for discharging the exhaust gas toward the side.

In addition, the main silencer (4) is further provided with a variable valve 13, the variable valve 13 is the ECU control opening and closing (or opening and closing according to the pressure) according to the exhaust gas inlet flow rate according to the engine output It is for regulating the amount of gas introduced into the furnace, and is installed at the gas inlet portion of the long tail pipe 9.

In addition, the housing 5 is composed of upper and lower cases 6a and 6b which are separated and contended with each other, as shown in FIGS. 3 (a) and 3 (b), and the upper and lower cases 6a and 6b The curved forming part 6c is formed to be bent at equal intervals.

In this case, the curved forming part 6c forms a curved surface, that is, the portions constituting both sides are formed with R1 and R3 curvatures having different radii, respectively, as compared with the radius R2 curvature of the recessed central portion.

In addition, the housing 5 has a relatively narrow width and a smaller thickness than the inlet 6d portion through which the exhaust gas flows, and the thickness of the inlet 6d portion is relatively small. Will form a deformation part 6f which is inclined in the width direction.

In addition, the housing 5 is further provided with a heat insulating mat 20, and the heat insulating mat 20 is produced by pressing in a state in which the upper and lower cases 6a and 6b are padded inward.

In addition, a pair of partitions 7a and 7b arranged at intervals such that the inner space of the housing 5 is partitioned into the first, second and third chambers 5a, 5b and 5c is shown in FIG. Likewise, a plurality of embossed stages 7c are formed, and the embossed stages 7c reduce noise caused by vibrations when the housing 5 is shaken.

In addition, a plurality of holes are formed in the partitions 7a and 7b to allow the exhaust gas to circulate between the first and second chambers 5a, 5b and 5c.

In addition, as shown in FIG. 2, the phosphorus tube 8 includes a plurality of discharge holes 8a which are partially discharged as the exhaust gas introduced through the exhaust pipe 1 passes through the section of the first chamber 5a. Is formed, and a plurality of discharge holes 8b are formed which are partially discharged while passing through the second chamber 5b section.

At this time, the in-tube 8 has a shape inclined to pass the section of the first chamber (5a) in a long path, while the section of the second chamber (5b) has a shape that passes in a straight shape.

In addition, the long tail pipe 9 includes an inlet tube 10 for guiding the gas introduced through the variable valve 13 in the section of the first chamber 5a toward the second and third chambers 5b and 5c, A connection tube 11 connected to the inflow tube 10 and positioned in the second chamber 5b section, and connected to the connection tube 11, passing through the first chamber 5a to the second and third chambers 5b, It is connected to the exhaust pipe 1 again via 5c, and consists of the tail tube 12 which discharges gas.

Here, the plurality of discharge holes 11a are formed in the connection tube 11 so as to discharge some gas into the second chamber 5b while passing through the second chamber 5b section.

In addition, the inflow tube 10 forms a bent portion that is bent in a “U” shape so as to change the gas flow direction toward the second chamber 5b when passing through the third chamber 5c section.

In addition, the tail tube 12 also forms a bent portion that is bent in a " U " shape so as to switch the gas flow direction toward the second chamber 5b when passing through the first chamber 5a section. The portion passing through the three chambers 5b and 5c has a straight line shape.

As described above, the main silencer 4 installed at the end of the exhaust pipe 1 is inclined into the space between the trunk room T and the rear bumper B. In the trunk room (T) part, the shielding plate (A) is padded to shield radiant heat that may be generated in the main silencer (4).

Hereinafter, the operation of the present invention will be described in detail with reference to the accompanying drawings.

The exhaust device of the present invention comprises a catalytic converter 2, a center silencer 3 and a main silencer 4 sequentially from the engine side on an exhaust pipe 1 connected to the engine and leading to the outside. The exhaust gas flow path passing through the main silencer 4 partitioned by the first, second, and third chambers 5a, 5b, and 5c by arranging the partitions 7a and 7b into the inner space is exhaust gas. The exhaust gas is introduced into the first, second, and third chambers 5a, 5b, and 5c using the phosphorus tube 8 through which the gas is introduced, and the variable valve on the side of the first chamber 5a using the long tail pipe 9 is provided. While exhausting the exhaust gas introduced by using (13) to the third chamber 5c and partially discharging it into the second chamber 5b, the second and third chambers 5b and 5c are again passed through the first chamber 5a. By forming a path to pass through, by reducing the low-frequency noise of the exhaust gas has a feature that can reduce the exhaust discharge sound emitted to the outside 5db ~ 7db.

Exhaust device of the present invention having such a feature is implemented through a main muffler (4) mounted on the exhaust pipe (1), the main muffler (4) for this purpose as shown in FIG. The housing 5 including the upper and lower cases 6a and 6b having the heat insulating mat 20 inwardly surrounds the exhaust pipe 1 and the circulation path of the introduced exhaust gas is long. The long tail pipe 9 is connected between the first, second, and third chambers 5a, 5b, and 5c that divide the ().

As a result, the main silencer 4 discharges the exhaust gas introduced through the in tube 8 to the third chamber 5c after passing through the first chamber 5a and the second chamber 5b. First chamber through a plurality of discharge holes (8a, 8b) drilled in the in-tube (8), that is, through the discharge hole (8a) formed on the path passing through the section of the first chamber (5a) of the in-tube (8) Partial exhaust gas is discharged to the area 5a, and part exhaust gas is discharged to the second chamber 5b area through the discharge hole 8b formed on the path passing through the section of the second chamber 5b.

At this time, the exhaust gas introduced through the in-tube 8 exits through the plurality of discharge holes 8a and 8b, thereby lowering the noise of the initial exhaust gas introduced.

In addition, the insulating mat 20 padded in the housing 5 blocks heat transfer of the hot exhaust gas introduced into the spaces of the first, second, and third chambers 5a, 5b, and 5c through the in tube 8. By reducing the temperature rise due to the exhaust gas formed in the housing 5, the heat of the exhaust gas is radiated through the housing 5 so that the rear bumper adjacent to the main silencer 4 is shown in FIG. 4. B) and the trunk room (T) as well as the wiring wiring installed around it greatly reduces the heat damage.

In addition, the heat insulating mat 20 padded in the housing 5 is coupled to each other to absorb moisture condensed into the upper and lower cases 6a and 6b constituting the housing 5 or to penetrate the gaps. It works.

Subsequently, the exhaust gas introduced into the spaces of the first, second, and third chambers 5a, 5b, and 5c in the housing 5 through the in tube 8 is long in the first chamber 5a through the variable valve 13. After flowing into the tail pipe 9, the second and third chambers 5b and 5c are turned, and again, the path leading to the first chamber 5a and then the second and third chambers 5b and 5c are passed. The exhaust gas is discharged toward (1), and the low frequency in the exhaust gas is reduced through the path through the long tail pipe 9.

In other words, the exhaust gas introduced into the housing 5 through the in tube 8 flows into the inlet tube 10 through the variable valve 13 installed on the first chamber 5a and into the inlet tube 10. The introduced exhaust gas has a flow path formed from the first chamber 5a toward the second and third chambers 5b and 5c.

Subsequently, the exhaust gas introduced into the inflow tube 10 and diverted toward the third chamber 5c is introduced into the first chamber 5a through the connection tube 11 again, and the connection tube 11 is Exhaust gas is discharged through the plurality of discharge holes 11a formed in the connecting tube 11 in the region of the second chamber 5b passing through, so as to reduce the noise of the exhaust gas passing through the long tail pipe 9 again. do.

As described above, the exhaust gas, which has been switched to the first chamber 5a through the second and third chambers 5b and 5c while passing through the inflow tube 10 and the connection tube 11, is connected to the connection tube 11. The tail tube 12 is discharged to the outside.

That is, when the exhaust gas passing through the connecting tube 11 flows into the tail tube 12, after passing through the bending portion bent in a “U” shape to pass through the space of the first chamber 5a, the second chamber ( 5b) and the third chamber 5c are discharged to the outside of the housing 5 via a straight path extending straight through the section, and as the exhaust gas is discharged through this process, FIGS. 5 (a) and (b). Improved performance as shown is obtained.

At this time, in the space of the first chamber 5a where the tail tube 12 is located, the condensed water introduced into the upper and lower cases 6a and 6b constituting the housing 5 is absorbed by the heat insulating mat 20, and then, When sucked in by the exhaust gas flow and pressure formed in the space of the first chamber 5a, it cools the “U” -shaped bent portion of the tail tube 12 and helps remove condensed water. The giving will work.

1 is a block diagram of an exhaust system of a vehicle equipped with a variable compound silencer according to the present invention.

2 is an internal configuration diagram of a variable composite silencer according to the present invention

Figure 3 (a), (b) is an external view of a variable variable silencer according to the present invention

4 is a vehicle mounted view of the variable composite silencer according to the present invention.

5 (a), (b) is a performance diagram of a variable composite silencer according to the present invention

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

1: exhaust pipe 2: catalytic converter

3: Center Silencer 4: Main Silencer

5 housing 5a, 5b, 5c: 1st, 2nd, 3rd chamber

6a, 6b: upper and lower cases 6c: bending forming part

6d, 6e: Inlet and outlet 6f: Deformation part

7a, 7b: bulkhead 7c: embossed

8: phosphorus tube 8a, 8b, 11a: discharge hole

9: long tail pipe 10: inlet tube

11: connection tube 12: tail tube

13: variable valve 20: heat insulation mat

A: heat shield B: rear bumper

T: Trunk Room

Claims (8)

An exhaust pipe 1 installed to collect exhaust gas generated from an engine and discharged to the outside, a catalyst converter 2 mounted to the exhaust pipe 1 and positioned close to the engine, and the catalytic converter 2 are spaced apart. A center silencer 3 mounted on the exhaust pipe 1 to reduce noise, and a main silencer 4 mounted on the end of the exhaust pipe 1 to discharge the exhaust gas to the outside. In the exhaust device of a configured vehicle, The main silencer (4) is a housing (5) with a heat insulating mat (20) as the inner space, Partition walls 7a and 7b arranged at intervals so that the inner space of the housing 5 is partitioned into first, second and third chambers 5a, 5b and 5c; An in-tube 8 which leads the exhaust gas introduced through the connected exhaust pipe 1 to reach the third chamber 5c; After the exhaust gas flows in from the first chamber 5a through the variable valve 13, the second and third chambers 5b and 5c are turned back to the first chamber 5a and then the second and third chambers 5b. Exhaust device of a vehicle with a variable compound silencer, characterized in that consisting of a long tail pipe (9) for discharging the exhaust gas passing through, 5c. 2. The inlet of claim 1, wherein the housing 5 is formed of upper and lower cases 6a and 6b which form a curved forming part 6c that is bent and formed at equal intervals and are separated from each other. Compared to the portion 6d, the portion of the discharge port 6e through which the exhaust gas is discharged is formed to have a relatively narrow width and a small thickness, and the inlet portion 6d has a deformed portion 6f that is inclined in the width direction. And a curved forming part (6c) formed to be bent at equal intervals in the upper and lower cases (6a, 6b). The method of claim 2, wherein the bending forming portion (6c) is to form a curved surface, that is, compared to the radius R2 curvature of the recessed central portion, the portions forming both sides are formed with R1, R3 curvature each having a different radius Exhaust system of a vehicle having a variable compound silencer, characterized in that the. 2. The pair of partitions 7a and 7b of claim 1, wherein the pair of partitions 7a and 7b are arranged at intervals so that the inner space of the housing 5 is partitioned into the first, second, and third chambers 5a, 5b, and 5c. An exhaust device for a vehicle with a variable compound silencer, characterized by forming an embossed stage 7c. The method of claim 1, wherein the in-tube (8) is formed with a plurality of discharge holes (8a) which is perforated so that the exhaust gas introduced through the exhaust pipe (1) is inclined through the section of the first chamber (5a), Exhaust device of a vehicle with a variable composite silencer, characterized in that a plurality of discharge holes (8b) are formed to be partially discharged again while passing through the second chamber (5b) section. The inlet tube (10) according to claim 1, wherein the long tail pipe (9) guides the gas introduced through the variable valve (13) in the section of the first chamber (5a) to the second and third chambers (5b, 5c). And a connection tube 11 connected to the inflow tube 10 and positioned in the second chamber 5b section, and connected to the connection tube 11, passing through the first chamber 5a to the second and third chambers. Exhaust device of a vehicle with a variable compound silencer, characterized in that it consists of a tail tube (12) which is connected back to the exhaust pipe (1) via (5b, 5c) and discharges gas. The method according to claim 6, characterized in that the connection tube 11 is formed with a plurality of discharge holes (11a) which are drilled to discharge some gas to the second chamber (5b) while passing through the second chamber (5b) section. Exhaust system of vehicle with variable compound silencer. The method according to claim 6, wherein the inlet tube 10 forms a bent portion that is bent in a "U" shape so as to switch the gas flow direction toward the second chamber 5b when passing through the third chamber 5c section, The tail tube 12 also forms a bent portion that is bent in a “U” shape so as to switch the gas flow direction toward the second chamber 5b when passing through the first chamber 5a section, and the second and third chambers. Exhaust system of a vehicle with a variable compound silencer, characterized in that the portion passing the section (5b, 5c) forms a straight line shape.

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