KR20110062591A - Exhaust system of engine - Google Patents

Abstract

PURPOSE: An exhaust system of an engine is provided to effectively block exhaust sound by blocking an exhaust-air flow path in a low/middle-speed area. CONSTITUTION: An exhaust system of an engine comprises a valve(120) and a movable load(200). The valve is arranged so that one side of the valve can rotate on a hinge to open/close an exhaust-gas flow path, through which exhaust gas passes. When the valve rotates on the hinge(150) to open/close the exhaust-air flow path, the centroid of the movable load moves along the valve by gravity.

Description

Exhaust system of engine {EXHAUST SYSTEM OF ENGINE}

The present invention relates to an exhaust system of an engine, and more particularly, to an exhaust system of an engine having a valve installed in an exhaust line to control the flow of exhaust gas.

In general, a valve unit for changing the cross-sectional area of the flow path by the exhaust gas is applied to the muffler (muffler) inside which the exhaust gas passes.

The valve unit has a function of reducing the exhaust sound by closing the valve by the force of the spring in the low medium speed region of the vehicle, and the flow pressure (back pressure) of the exhaust gas opens the valve at high speeds.

On the other hand, the valve unit mounted inside the silencer is opened linearly by the exhaust pressure of the engine, there is a problem that the effect of reducing the exhaust noise is low at low and medium speed, on the contrary, it was difficult to maximize the output at high speed.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to block the exhaust passage in the low and medium speed region to effectively reduce the exhaust noise, and to easily open the exhaust passage in the high speed region and output the same. It is to provide an exhaust system of the engine that effectively improves.

Exhaust system of the engine according to the present invention for achieving this object, the valve is arranged so that one side is rotatable about the hinge so as to open and close the exhaust passage through which the exhaust gas, and the valve for opening and closing the exhaust passage The rotational center of gravity of the hinge includes a moving load which is arranged to be movable along the valve by gravity.

A muffler housing in which the exhaust gas passes through the interior, a baffle flow path disposed inside the muffler housing to block the flow of the exhaust gas, and a baffle flow path through which the exhaust gas flows, the baffle corresponding to the exhaust flow path It is mounted, the hinge is provided on the outside to guide the rotation angle of the valve, the lower portion further comprises a guide housing which is formed with a guide housing passage communicating with the baffle flow path.

Inside the valve, an inner space in which the moving load moves is formed in the longitudinal direction.

The valve may include a first body having one end connected to the hinge and a second body integrally connected to the other end of the first body, the second body having an angle set with the first body; Including, but is formed inside the first body and the second body to move the moving load is formed.

The moving load has a circular bar or sphere shape to roll and move the inner space.

The moving load may be a liquid phase to flow through the internal space.

The valve further includes a third body formed on an opposite side of the first body around the hinge and having an internal space therein.

A fixed load disposed to be fixed to the inner space of the second body; It further comprises, the liquid movement fluid is disposed in the inner space of the third body.

The valve is positioned horizontally to block the exhaust flow path, and the exhaust flow path is opened by rotating an angle set counterclockwise about the hinge.

As described above, according to the exhaust system of the engine according to the present invention, the exhaust passage is blocked in the low and medium speed region to effectively block the exhaust sound, and the exhaust passage is opened in the high speed region to maximize the output of the engine.

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

1A is an internal perspective view of an exhaust system of an engine according to a first embodiment of the present invention.

Referring to FIG. 1A, an exhaust system of an engine includes a muffler 100. The muffler 100 includes a muffler housing 105, a baffle 110, and a valve 120.

The muffler housing 105 is divided into a first space in the front and a second space in the rear by the baffle 110, and an exhaust flow passage leading from the first space to the second space in the middle of the baffle 110. 130) is formed.

The valve 120 is provided to selectively block the exhaust passage 130. When a small amount of exhaust gas is discharged from the engine, the valve 120 blocks the exhaust passage 130 to reduce exhaust noise. Let's do it.

In addition, when a large amount of exhaust gas is discharged from the engine, the valve 120 opens the exhaust flow path 130 to reduce the back pressure to help improve the output.

Referring to FIG. 1, the baffle 110 is provided with the guide housing 140, and a hinge 150 is provided at an outer end of the guide housing 140.

One end of the valve 120 is connected to the hinge 150, and the other end of the valve 120 is installed to be rotatable about the hinge 150 as a free end.

1B is a schematic side view of an exhaust system of an engine according to the first embodiment of the present invention.

Referring to FIG. 1B (A), the valve 120 includes a first body 120a and a second body 120b.

One end of the first body 120a is connected to the hinge 150, and the second body 120b is integrally connected to the other end thereof, and the second body 120b is the first body 120a. ) And the set angle.

In an embodiment of the present invention, the first body 120a is disposed horizontally, and the second body 120b has an inclination angle set downward.

An internal space 190 is formed in the longitudinal direction of the first body 120a and the second body 120b, and a moving load 200 is disposed in the internal space 190.

The moving load 200 has a structure moving along the inner space 190 of the first body 120a and the second body 120b. Since the moving load 200 has a circular bar or sphere shape, it is preferable to easily move the inner space 190 by rolling.

Referring to (B) of FIG. 1B, a guide housing passage 180 is formed at a lower portion of the guide housing 140, and the baffle 110 corresponds to the guide housing passage 180 of the guide housing 140. In baffle passage 170 is formed. The guide housing passage 180 and the baffle passage 170 form the exhaust passage 130.

In an embodiment of the present invention, the guide housing 140 guides the movement of the valve 120 and forms a flow path of the exhaust gas.

Referring to FIG. 1B (A), when the rotation speed of the engine is low, and the amount and pressure of exhaust gas discharged are low, the first body 120a of the valve 120 is maintained in the horizontal direction, and the valve ( 120, the movement load 200 is disposed inside the second body 120b inclined downwardly from the first body 120a so that the exhaust passage 130 is blocked.

In addition, referring to FIG. 1B (B), when the rotation speed of the engine is high, and the amount and pressure of the exhaust gas are high, the valve 120 rotates counterclockwise around the hinge 150. .

At this time, the moving load 200 located in the internal space 190 of the valve 120 moves toward the hinge of the first body 120a located below the second body 120b by gravity. .

2 is a schematic side view of an exhaust system of an engine according to a second embodiment of the present invention.

2, one end of the valve is connected to the hinge.

Referring to FIG. 2A, when the engine speed is small, the valve 120 is positioned in the horizontal direction to minimize the exhaust noise by blocking the flow path of the exhaust gas.

Referring to FIG. 2B, when the engine speed is large, the valve 120 is located in a counterclockwise direction around the hinge 150 to improve output by opening the flow path of the exhaust gas. The moving load 200 therein moves toward the hinge 150 connected to the valve 120 by gravity.

As described above, the moving load 200 is preferably a ball or circular rod type of high rolling capacity.

3 is a graph showing the relationship between the displacement of the valve and the rotational torque in the exhaust system of the engine according to the first and second embodiments of the present invention.

Referring to Figure 3, the horizontal axis represents the rotational displacement of the valve 120, the vertical axis represents the rotational torque applied to the valve 120 by the exhaust gas.

Existing valves are operated by a spring, so the rotational torque is linearly changed according to the displacement. However, the valve according to the embodiment of the present invention has a relatively large rotational torque at the beginning of the displacement, thereby effectively reducing the exhaust noise. It has a relatively small rotational torque at the end of the displacement, thereby improving the output.

That is, the present invention has an effect of effectively attenuating the exhaust sound when the engine is low rotation than the conventional technology, and improves the output when the engine is high rotation.

4 is a schematic side view of an exhaust system of an engine according to a third embodiment of the present invention.

Referring to FIG. 4, the moving fluid 400 is filled in the internal space of the valve 120 by a set amount. The moving fluid 400 is preferably not evaporated by the temperature of the exhaust gas and is not deformed by heat. In an embodiment of the present invention, the moving fluid 400 may be applied to one kind of oil.

Referring to FIG. 4A, when the valve 120 is positioned horizontally to block the exhaust flow path 130, the moving fluid 400 contained in the valve 120 is connected to the valve ( Evenly along 120).

Referring to FIG. 4B, when the valve 120 is turned counterclockwise to open the exhaust passage 130, the moving fluid 400 contained in the valve 120 is moved. It moves to the hinge 150 side of the valve 120.

As shown in FIG. 4A, in the low RF region of the engine having a small amount of exhaust gas, the valve 120 blocks the exhaust flow path 130 to easily reduce the exhaust sound. Likewise, the valve 120 opens the exhaust passage 130 in the high AL region of the engine having a large amount of exhaust gas, thereby easily improving output.

5 is a graph showing the relationship between the displacement of the valve and the rotational torque in the exhaust system of the engine according to the third embodiment of the present invention.

5, the horizontal axis represents the rotational displacement of the valve, the vertical axis represents the rotational torque applied to the valve by the exhaust gas.

Conventional valves are operated by springs, so the rotational torque varies linearly with the displacement, but the valve according to the embodiment of the present invention has a relatively large rotational torque at the beginning of the displacement to effectively reduce the exhaust noise. It has a relatively small rotational torque at the end of the displacement, thereby improving the output.

6 is a schematic side view of an exhaust system of an engine according to a fourth embodiment of the present invention.

Referring to FIG. 6, the first body 120a is disposed in a right direction with respect to the hinge 150, and the second body 120b is disposed on the lower right side at an angle set with the first body 120a. Is formed, the fixed load 600 is disposed inside the second body (120b).

The third body 120c is integrally formed with the first body 120a in a direction opposite to the first body 120a, that is, in a left direction. As shown, the first body 120a and the second body 120b are disposed on a virtual horizontal straight line.

The interior of the first body (120a) and the interior of the third body (120c) has a structure that is closed to each other by a partition wall around the hinge 150, the interior of the third body (120c) The moving fluid 400 is filled by the load.

Although no moving load is disposed in the second body 120b of FIG. 6, a moving load having a rolling property such as a ball or a rod may be disposed in the second body 120b according to a design specification.

In the exemplary embodiment of the present invention, when the exhaust passage is blocked as a whole, the valve 120 (FIG. 4) or the first body 120 a (FIG. 6) may be horizontally disposed but may be inclined.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and easily changed and equalized by those skilled in the art from the embodiments of the present invention. It includes all changes to the extent deemed acceptable.

1A is an internal perspective view of an exhaust system of an engine according to a first embodiment of the present invention.

1B is a schematic side view of an exhaust system of an engine according to the first embodiment of the present invention.

2 is a schematic side view of an exhaust system of an engine according to a second embodiment of the present invention.

3 is a graph showing the relationship between the displacement of the valve and the rotational torque in the exhaust system of the engine according to the first and second embodiments of the present invention.

4 is a schematic side view of an exhaust system of an engine according to a third embodiment of the present invention.

5 is a graph showing the relationship between the displacement of the valve and the rotational torque in the exhaust system of the engine according to the third embodiment of the present invention.

6 is a schematic side view of an exhaust system of an engine according to a fourth embodiment of the present invention.

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

100: muffler

105: muffler housing

110: baffle

120: valve

120a: first body

120b: second body

120c: third euro

130: exhaust passage

140: guide housing

150: hinge

170: baffle passage

180: guide housing passage

190: interior space

200: moving load

400: moving fluid

600: fixed load

Claims (9)

A valve disposed on one side to be rotatable about a hinge to open and close the exhaust flow path through which the exhaust gas passes; And A moving load arranged such that the center of gravity of the valve is moved along the valve by gravity when the valve rotates about the hinge to open and close the exhaust flow path; Exhaust system of the engine comprising a. In claim 1, A muffler housing through which the exhaust gas passes; A baffle disposed inside the muffler housing to block the flow of the exhaust gas, and a baffle flow path through which the exhaust gas flows is formed; And A guide housing mounted to the baffle in correspondence with the exhaust passage, the hinge being provided on the outside to guide the rotation angle of the valve, and having a guide housing passage formed at the bottom thereof to communicate with the baffle passage; The exhaust system of the engine further comprising. In claim 1, The exhaust system of the engine, characterized in that the inner space in which the moving load is moved in the longitudinal direction formed inside the valve. 4. The method of claim 3, The valve, A first body having one end connected to the hinge; And A second body integrally connected to the other end of the first body and having an angle set with the first body; Including, The internal space of the engine exhaust system, characterized in that formed along the first body and the second body. 4. The method of claim 3, The moving load has an exhaust system of the engine, characterized in that it has a circular bar or sphere shape to move the interior space. 4. The method of claim 3, The moving load is an exhaust system of an engine, characterized in that the liquid flows through the internal space. In claim 4, The valve, A third body formed on an opposite side of the first body around the hinge and having an internal space formed therein; The exhaust system of the engine further comprising. 8. The method of claim 7, A fixed load disposed to be fixed to the inner space of the second body; Further comprising: The exhaust system of the engine, characterized in that the liquid movement fluid is disposed in the inner space of the third body. In claim 1, The valve is arranged horizontally or the end is inclined downward to block the exhaust flow path, the exhaust system of the engine, characterized in that for opening the exhaust flow path by rotating the angle set in the counterclockwise direction around the hinge.

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