KR101526380B1 - Exhaust system of engine - Google Patents

Abstract

An exhaust system for an engine according to an embodiment of the present invention includes: a valve disposed so that one side thereof is rotatable about a hinge so as to open and close an exhaust passage through which exhaust gas passes; and a valve The center of gravity of which is arranged to be movable along the valve by gravity.

Accordingly, in the low-middle-speed region, the exhaust passage is blocked to effectively block the exhaust noise, and in the high-speed region, the exhaust passage is opened to maximize the output of the engine.

Engine, exhaust, valve, moving load, round bar, sphere, liquid, rotational displacement, rotational torque

Description

[0001] EXHAUST SYSTEM OF ENGINE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust system of an engine, and more particularly, to an exhaust system of an engine provided in a exhaust line and having a valve for controlling the flow of exhaust gas.

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

The valve unit closes the valve by the force of the spring in the low middle speed range of the vehicle to reduce the exhaust sound, and the flow pressure (back pressure) of the exhaust gas opens the valve at the time of high speed running.

On the other hand, the valve unit mounted inside the silencer is linearly opened by the exhaust pressure of the engine, and the reduction effect of the exhaust sound is small in the low center of gravity. On the contrary, there is a problem in maximizing the output at high speed.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above problems, and it is an object of the present invention to provide an exhaust emission control device for an internal combustion engine, The present invention provides an exhaust system for an engine which effectively improves the exhaust gas temperature.

According to an aspect of the present invention, there is provided an exhaust system for an engine, comprising: a valve disposed at one side thereof so as to be rotatable about a hinge so as to open and close an exhaust passage through which exhaust gas passes; And a moving load which is arranged such that the center of gravity thereof is movable along the valve by gravity when the hinge is rotated around the hinge.

A muffler housing in which the exhaust gas passes, a baffle disposed inside the muffler housing to block the flow of the exhaust gas, a baffle in which a baffle flow path through which the exhaust gas flows, And a guide housing having a hinge provided on an outer side thereof for guiding the rotation angle of the valve and having a guide housing passage communicating with the baffle channel.

An internal space through which the moving load is moved is formed in the longitudinal direction of the valve.

The valve includes a first body having a first end connected to the hinge and a second body integrally connected to the other end of the first body, the second body having a predetermined angle with the first body; And an internal space through which the moving load is moved is formed in the first body and the second body.

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

The moving load may be in a liquid state to flow through the inner space.

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

A fixed load disposed to be fixed to the inner space of the second body; And a liquid moving fluid is disposed in an inner space of the third body.

The valve is horizontally positioned to block the exhaust passage, and the exhaust passage is opened by rotating the angle set in the counterclockwise direction around the hinge.

As described above, according to the exhaust system of the engine according to the present invention, the exhaust air flow is blocked at the low middle speed region to effectively block the exhaust sound, and the exhaust flow path 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 at the front side and a second space at the rear by the baffle 110 and an exhaust gas flow path from the first space to the second space at the middle of the baffle 110 130 are formed.

The valve 120 is provided to selectively block the exhaust passage 130. When the engine 120 exhausts a small amount of exhaust gas, the valve 120 closes the exhaust passage 130 to reduce the exhaust noise. .

In addition, when a large amount of exhaust gas is discharged from the engine, the valve 120 opens the exhaust passage 130 to reduce the back pressure, thereby improving the output.

Referring to FIG. 1, the guide housing 140 is mounted on the baffle 110 and the hinge 150 is provided on 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 free to rotate about the hinge 150.

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

Referring to FIG. 1B, 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 of the first body 120a. The second body 120b is connected to the first body 120a ) And the set angle.

In the embodiment of the present invention, the first body 120a is horizontally disposed, and the second body 120b has a downwardly inclined angle.

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 that moves along the inner space 190 of the first body 120a and the second body 120b. The moving load 200 has a circular bar or a spherical shape, so that it is preferable to easily roll the inner space 190.

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

In the 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.

1B, when the rotational speed of the engine is low and the amount and pressure of the exhaust gas discharged are low, the first body 120a of the valve 120 is maintained in the horizontal direction, The moving load 200 is disposed inside the second body 120b inclined downward from the first body 120a so that the exhaust passage 130 is blocked.

Referring to FIG. 1B, when the rotational speed of the engine is high and the amount and pressure of the discharged exhaust gas are high, the valve 120 rotates counterclockwise about 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 under 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.

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

Referring to FIG. 2A, when the number of revolutions of the engine is small, the valve 120 is positioned in the horizontal direction, thereby shutting off the flow path of the exhaust gas to minimize the exhaust sound.

Referring to FIG. 2B, when the number of revolutions of the engine is large, the valve 120 is positioned counterclockwise about the hinge 150, opening the exhaust gas flow path to improve the output The moving load 200 moves toward the hinge 150 connected to the valve 120 by gravity.

As described above, the moving load 200 is preferably a ball or a circular rod type and has a high rolling ability.

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.

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

Since the conventional valve is operated by the spring, the rotation torque according to the displacement is linearly changed. However, the valve according to the embodiment of the present invention has a relatively large rotational torque at the beginning of displacement, And has a relatively small rotational torque in the latter stage of displacement, thereby improving the output.

That is, the present invention has the effect of effectively damping the exhaust sound when the engine is rotating at a low speed compared with the existing technology, and improving the output when the engine is at high speed.

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 internal space of the valve 120 is filled with a predetermined amount of the moving fluid 400. It is preferable that the moving fluid 400 is 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 can be applied to one kind of oil.

4A, when the valve 120 is horizontally positioned to block the exhaust flow path 130, the moving fluid 400 contained in the valve 120 flows through the valve (not shown) 120, respectively.

Referring to FIG. 4B, when the valve 120 is turned counterclockwise and the exhaust passage 130 is opened, the moving fluid 400, And moves to the hinge 150 side of the valve 120.

As shown in FIG. 4 (A), in the low-temperature region of the engine in which the exhaust gas is small, the valve 120 blocks the exhaust passage 130 to easily reduce the exhaust noise, Similarly, in the high-ary region of the engine in which the exhaust gas is large, the valve 120 opens the exhaust passage 130 to improve the output easily.

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, and the vertical axis represents the rotational torque applied to the valve by the exhaust gas.

Since the conventional valve is operated by the spring, the rotation torque according to the displacement is linearly changed. However, the valve according to the embodiment of the present invention has a relatively large rotational torque at the beginning of displacement, And has a relatively small rotational torque in the latter stage of 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.

6, the first body 120a is disposed on the right side of the hinge 150 and the second body 120b is disposed on the lower right side of the first body 120a at a predetermined angle. And a fixed load 600 is disposed inside the second body 120b.

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

The inside of the first body 120a and the inside of the third body 120c are closed together by a partition wall around the hinge 150. Inside the third body 120c, As a load, the moving fluid (400) is filled.

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

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

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.

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 a 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 Related Art

100: muffler

105: muffler housing

110: Baffle

120: Valve

120a: first body

120b: second body

120c:

130:

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 of the hinge so as to be rotatable about the hinge so as to open and close the exhaust passage through which the exhaust gas passes; And A moving load disposed so as to be movable along the valve by gravity in accordance with an inclination of the valve when the valve rotates about the hinge to open and close the exhaust passage; And an exhaust system for the engine. The method of 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 having a baffle passage through which the exhaust gas flows; And A guide housing mounted on the baffle correspondingly to the exhaust passage, the guide housing having a hinge provided on an outer side thereof for guiding a rotation angle of the valve and having a guide passage communicating with the baffle passage; And an exhaust system for the engine. The method of claim 1, Wherein an inner space through which the moving load is moved is formed in the longitudinal direction of the valve and an inclination of the inner space is varied when the valve is rotated about the hinge. 4. The method of claim 3, Wherein the valve comprises: A first body having a first end connected to the hinge; And A second body integrally connected to the other end of the first body, the second body having a predetermined angle with the first body; , ≪ / RTI & Wherein the inner space is formed along the first body and the second body. 4. The method of claim 3, Wherein the moving load has a circular bar or spherical shape to roll over the inner space. 4. The method of claim 3, Wherein the moving load is a liquid phase so as to flow through the inner space. 5. The method of claim 4, Wherein the valve comprises: A third body formed on an opposite side of the first body with respect to the hinge and having an internal space formed therein; And an exhaust system for the engine. 8. The method of claim 7, A fixed load disposed to be fixed to the inner space of the second body; Further comprising: And a liquid transfer fluid is disposed in an inner space of the third body. The method of claim 1, Wherein the valve is disposed horizontally or at an end of the valve so as to be inclined downward to block the exhaust passage and to open the exhaust passage by rotating an angle set in a counterclockwise direction about the hinge.

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