KR101772267B1 - Resonator for vehicle - Google Patents

Abstract

The present invention relates to a resonator having a resonance chamber for tuning a frequency and having an inlet port as an air inlet channel and an outlet port as an outflow channel of the air, the first external pipe having the inlet and the outlet An outer pipe having a first outer pipe, an outer pipe having a second outer pipe, an inner pipe disposed inside the outer pipe and having a plurality of slits for providing a moving path of air, And one end of the expanding pipe is disposed at a predetermined distance from the outer pipe so as to form an interval which is a movement path of the air. The resonator includes a plurality of resonance chambers, .

Description

Resonator for vehicle

More particularly, the present invention relates to a resonator for a vehicle, and more particularly to a resonator having a plurality of bends formed between an outer pipe and an inner pipe inserted therein so that a difference in diameter between an inlet and an outlet of air passing through the resonator is large, The present invention relates to a resonator for a vehicle that can improve the degree of freedom in tuning the frequency of air.

Generally, an intake system of an automobile is provided with an air cleaner, a turbocharger, an intercooler, an air duct, and an engine manifolder, The external air introduced into the internal combustion engine by the system repeatedly expands and compresses, causing the intake pulsation. Such a pulsation of the intake air causes noise according to the pressure change of the air, and in particular, caused a resonance phenomenon of the air in the vehicle body or the interior space of the vehicle, resulting in a larger noise.

In order to suppress such intake noise, a resonator is installed in the intake hose connecting the air cleaner and the intake manifold, for tuning the intake system to a specific frequency.

As an example of a resonator according to the related art, a resonator disclosed in Korean Patent Laid-Open Publication No. 10-2006-0116275 (published on November 15, 2006) includes an outer pipe forming an outer shape, And an internal pipe that is installed and provides a passage for air. A resonance chamber for reducing noise by tuning the frequency of air is formed in the space between the outer pipe and the inner pipe, and a slit for guiding the movement of air to the resonance chamber is formed in the inner pipe. That is, the air flowing into the inner pipe moves to the resonance chamber through the slit, and the frequency of the air moved to the resonance chamber is tuned to reduce the noise of the air.

However, such a resonator has a problem that the frequency tuning of the outside air can not be performed over a wide band because the number of resonance chambers is limited. That is, since the resonator has a limited number of resonance chambers, the tuning freedom of the frequency is low, so that noise reduction of the outside air can not be smoothly performed.

As another example of a resonator according to the prior art, Korean Patent Laid-Open Publication No. 10-2011-0007460 (published on Jan. 24, 2011) discloses a resonator in which the diameters of the inlet and outlet of the air are different from each other. Generally, if the diameter of the air inlet and the diameter of the outlet of the air are different from each other, the inner pipe coupled with the outer pipe needs to be manufactured so as to form an inclined portion at an angle.

However, there is a manufacturing problem that if the diameter of the inlet and the outlet, which are air passages, differ by 1.4 to 1.5 times or more, the internal pipe can not be easily expanded. In addition, since the inclined portion of the inner pipe is formed in a limited space, it is difficult to manufacture a slit for tuning the frequency at the inclined portion.

Korean Patent Publication No. 10-2006-0116275 (published on November 15, 2006). Korean Patent Publication No. 10-2011-0007460 (disclosed on Jan. 24, 2011).

SUMMARY OF THE INVENTION The present invention has been developed in order to solve the problems and limitations of the prior art as described above, and it is an object of the present invention to provide a resonator having a large diameter difference between an inlet and an outlet of air, The present invention has an object of providing a resonator for a vehicle which can increase the degree of freedom in tuning the frequency of air and facilitate the manufacture of the resonator since a plurality of bending portions forming a resonance chamber are formed.

According to an aspect of the present invention, there is provided a resonator having a resonance chamber for tuning a frequency, the resonance chamber having an inlet port, which is an inlet port for air, and an outlet port, which is an outlet port for air, An outer pipe having an outer pipe and a second outer pipe with the outlet formed therein, an inner pipe disposed inside the outer pipe and having a plurality of slits for providing a path for air movement, And an expansion pipe inserted between the outer pipe and the inner pipe and dividing the resonance chamber into a plurality of pipes, wherein one end of the expansion pipe is spaced apart from the outer pipe by a predetermined distance Thereby providing an on-vehicle resonator.

According to the present invention, since an expansion pipe is inserted between an outer pipe and an inner pipe, and a gap, which is a passage of air, is formed between the expansion pipe and the outer pipe, the number of resonance chambers increases, There are advantages.

In addition, the resonance chamber in which the gap is formed has an advantage that air having a high frequency can be absorbed.

In addition, even if the diameter difference between the inlet and the outlet of the resonator is large, it is not necessary that one end of the pipe is coupled to the outer pipe, so that it is easy to manufacture the resonance chamber in the resonator.

Further, even if the inlet and the outlet of the resonator are formed to have diameters different from each other, there is no need to manufacture an inclined portion in the inner pipe, so that the inner space of the resonator can be efficiently used.

In addition, since the outer pipe, the inner pipe, and the expanding pipe are hermetically coupled to each other through welding, leakage of outside air is prevented, thereby maximizing the efficiency of reducing intake noise.

1 is a perspective view of a resonator according to an embodiment of the present invention.
2A and 2B are exploded views showing the internal structure of the resonator.
3 is a cross-sectional view taken along the line I-I 'of FIG.
4 is a cross-sectional view taken along line II-II 'of FIG.
5 is a view showing a flow of air passing through a resonator according to an embodiment of the present invention.
6 is a view for explaining the size of a plurality of pipes constituting the first resonance chamber and the size of the interval for guiding the movement of air to the first resonance chamber.
FIG. 7 is a graph showing a noise reduction amount according to the frequency of air moving to the first resonance chamber.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Although the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that the technical idea of the present invention and its essential structure and operation are not limited thereby.

FIG. 1 is a perspective view of a resonator according to an embodiment of the present invention, FIG. 2 (a) is an exploded view showing the detailed components of the resonator, and FIG. 2 (b) is a perspective view of an expanding pipe, which is a component of the resonator. FIG. 3 is a cross-sectional view taken along the line I-I 'of FIG. 1 to show the internal structure of the resonator, and FIG. 4 is a cross-sectional view taken along the line II-II' of FIG.

The resonator 1 according to the present invention includes a first outer pipe 10 constituting a part of the outer shape and a second outer pipe 20 constituting another part of the outer shape. The end diameter A of the first outer pipe 10 and the end diameter B of the second outer pipe 20 may have different values. For example, the end diameter A of the first outer pipe may be greater than the end diameter B of the second outer pipe. The end of the first outer pipe 10 may be an inlet port 15 and the end of the second outer pipe 20 may be an outlet port 45 which is an outlet port of the air.

An inner pipe (40) can be inserted into the inner space of the first outer pipe (10) and the second outer pipe (20). At this time, if the end diameter (A) of the first outer pipe is 1.4 times to 1.5 times the end diameter (B) of the second outer pipe, one end of the inner pipe (40) (10, 20).

Accordingly, in the present invention, an expansion pipe 30 may be inserted between the outer pipe 10, 20 and the inner pipe 40. Specifically, an inner pipe 40 is inserted into the inner space of the outer pipe 10, 20, and an inner pipe 40 is inserted into the inner space of the pipe 30.

The expansion pipe 30 includes a first bent portion 31 formed with a hollow 31a for passing air therethrough, an inner coupling portion 32 engaged with the inner pipe 40, And a chamber forming part (33) for coupling with the chamber forming part (20). One end of the first bent portion 31 is connected to the inner coupling portion 32, and the other end of the first bent portion 31 can be bent.

The first bent portion 31, the inner engaging portion 32, and the chamber forming portion 33 may be integrally combined with each other. That is, the pipe 30 can be manufactured in such a manner that the pipe is expanded through the mold at the production stage of the part.

The other end of the first bent portion 31 may be bent in a direction parallel to the extending direction of the first outer pipe 10. Therefore, the first bent portion 31 may be spaced apart from the first outer pipe 10 by a predetermined distance. That is, the first bent portion 31 is disposed to be spaced apart from the first outer pipe 10 with a space L, which is a passage for air movement. In other words, an interval L for providing a moving path of air is formed between the first bent portion 31 and the first outer pipe 10, and the air is introduced into the resonance chamber 100 through the gap L The noise can be reduced as the tuning operation of the frequency is performed.

The chamber forming part 33 includes a second bending part 331 bent in a direction orthogonal to the internal coupling part 32 with reference to a moving direction of air, a second bending part 331 bending in a direction perpendicular to the second bending part 331 And an outer engaging portion 333 connected to the outer pipe 10 and 20 and a third bending portion 332 bent in a direction orthogonal to the outer engaging portion 333. The distal end of the third bent portion 332 may be bent for the convenience of manufacturing so that the end portion of the third bent portion 332 can be easily coupled with the inner pipe 40.

The height M of the second bent portion 331 and the third bent portion 332 may be relatively larger than the height N of the first bent portion 31. Therefore, a gap L, which is a passage for air, can be formed between the first bent portion 31 and the first outer pipe 10.

Conventionally, when the diameters of the inlet and the outlet are different, a sloping portion has to be formed in order for the inner pipe to be directly coupled to the outer pipe. According to the present invention, since the inner pipe 40 and the outer pipes 10 and 20 can be coupled with each other without inclined portions by the pipe 30, it is possible to easily manufacture the resonator 1 . In addition, although a slit, which is a passage of air, has been formed in the inclined portion of the inner pipe in the related art, there is a problem in that it is not easy to manufacture the slit due to insufficient space for manufacturing the slit. In the present invention, instead of the slit, a space L may be formed between the outer pipes 10 and 20 and the pipe 30 to provide a passage for air, so that the inner space of the resonator 1 Can be used more efficiently.

The inner pipe 40 may be formed with a plurality of slits 41 having the same function as the gap L. [ Specifically, the plurality of slits 41 may include a first slit 411 disposed adjacent to the inlet, a second slit 411 disposed at a predetermined distance from the first slit 411, 412).

A resonance chamber 100 for adjusting the frequency of external air is provided between the external pipes 10 and 20 and the internal pipe 40. The resonance chamber 100 is divided into a plurality of spaces by an expansion pipe 30 inserted between the outer pipes 10 and 20 and the inner pipe 40. Specifically, the resonance chamber 100 includes a first resonance chamber 110 formed between the first bent portion 31 and the second bent portion 331, and a second resonance chamber 110 formed between the first bent portion 31 and the second bent portion 331, Which is formed between the second resonance chamber 120 and the third bend section 332 formed between the third bend section 331 and the third bend section 332 and the second outer pipe 20 and the inner pipe 40, And a resonance chamber 130.

The first resonance chamber 110 is communicated with the gap L and the second resonance chamber 120 is communicated with the first slit 411. Also, the third resonance chamber 130 may be in communication with the second slit 412 to perform frequency tuning of the air.

Hereinafter, the movement path of the external air passing through the resonator 1 and the manner in which a plurality of pipes forming the resonator 1 are coupled together will be described.

5 is a view showing a flow of air passing through a resonator according to an embodiment of the present invention.

As shown in the drawing, the resonator 1 according to the present invention is assembled such that a plurality of pipes are welded to each other. Specifically, the connection (a) between the pipe 30 and the first outer pipe 10 and the second outer pipe 20, the connection (b) between the pipe 30 and the inner pipe 40, 2 The coupling (c) of the outer pipe (20) and the inner pipe (40) is performed by welding all along the circumferential direction. Since the plurality of pipes are hermetically coupled to each other through the welding method, leakage of outside air is prevented, thereby maximizing efficiency of intake noise reduction.

In the present embodiment, the plurality of pipes are coupled to each other by the welding method. However, the coupling method is not limited thereto. In the case where the plurality of pipes are airtightly coupled to each other, It is also possible. According to the above-described method, the resonator 1 in which the plurality of pipes are hermetically coupled to each other to reduce noise is completed as an assembly.

On the other hand, the resonator according to the related art has a limited number of resonance chambers due to manufacturing problems. In contrast, the resonator according to the present embodiment has a structure capable of easily tuning the frequency, unlike the conventional resonator structure.

However, the size of the plurality of pipes 10, 20, 30, and 40 may be limited to a certain numerical value in order for air having a high frequency to flow into the first resonance chamber 110.

6, the first resonance chamber 110 includes a portion of the first outer pipe 10, a first bent portion 31 disposed at a predetermined distance from the first outer pipe 10, A second bent portion 331 extending in a direction parallel to the extending direction of the first bent portion 31 and a second bent portion 331 having one end connected to the first bent portion 31 and the other end connected to the second bent portion 331, And an inner engaging portion 32 connected to the inner engaging portion 32.

The design conditions for absorbing air having a high frequency in the first resonance chamber 110 are as follows.

The diameter D1 of the first outer pipe 10 has a value 1.4 to 1.6 times the diameter D2 of the inner engaging portion 32. [ The height W of the inner engaging portion 32 is 0.3 times the diameter D2 of the inner engaging portion 32. The width L of the gap has a value of 0.04 to 0.12 times the diameter D2 of the inner joint portion 32. [

Table 1 below shows a resonator 1 manufactured according to an exemplary ratio conforming to the above design conditions, and shows a maximum frequency of air absorbed in the first resonance chamber 110 as an experiment example.

W / D2 D1 / D2 L / D2 Absorbed into the first resonance chamber
Maximum frequency of air (Hz)
0.3
1.4 0.08 3600 1.5 0.08 4000 1.6 0.08 4300

As can be seen from the above table, the resonator 1 manufactured according to the above design conditions can absorb air having a high frequency of 3600 Hz to 4300 Hz. If the above design conditions constituting the first resonance chamber 110 are changed, air having a high frequency can not be absorbed. For example, if the ratio of W / D2 is changed to 0.2 as shown in the following table, the maximum frequency of the air absorbed into the first resonance chamber 110 decreases as follows.

W / D2 D1 / D2 L / D2 Absorbed into the first resonance chamber
Maximum frequency of air (Hz)
0.2
1.4 0.08 2800 1.5 0.08 3000 1.6 0.08 3200

Even if the values of D1 / D2 and L / D2 increase as shown in Table 2 with W / D2 of 0.2, the overall structure of the resonator 1 or a manufacturing problem is accompanied, The maximum frequency of the air absorbed into the resonance chamber 110 can not have a value of 3600 Hz to 4300 Hz. That is, the numerical values of W / D2, D1 / D2, and L / D2 shown in Table 1 are optimal design conditions for absorbing high frequency air to the first resonance chamber 110.

In FIG. 7, in accordance with the frequency of the air absorbed in the first resonance chamber 110 under the design conditions of W / D2 of 0.3, D1 / D2 of 1.5, and L / D2 of 0.08, And the noise reduction amount is shown in a graph. As shown in the figure, the resonator 1 according to the present invention is provided with a resonance chamber for absorbing air having a maximum frequency of 3600 Hz to 4300 Hz, so that the noise generated by the air having the high frequency can be reduced It is effective. Further, there is an advantage that the frequency tuning in the low frequency region can be performed by the change of the L / D2 value.

Hereinafter, the traveling path of the outside air passing through the resonator 1 and the manner in which the intake noise is reduced will be described.

A part of the air introduced into the inlet 15 is moved to the first resonance chamber 110 through the gap L and the other part of the air introduced into the inlet 15 flows through the inner pipe 40 And is moved to the inner space of the resonator 1 to be formed. The air introduced into the first resonance chamber 110 may be air having a high frequency, for example, as described above. That is, the first resonance chamber 110 may be a resonance chamber for reducing noise by tuning air having a high frequency.

Likewise, a part of the air moving along the inner pipe 40 passes through the first slit 411 and the other part passes through the second slit 412 to pass through the second resonance chamber 120 and the third resonance chamber 130). The air introduced into the second resonance chamber 120 may be air having a relatively lower frequency than air introduced into the first resonance chamber 110. In the same principle, air introduced into the third resonance chamber 130 may be air having a relatively lower frequency than air introduced into the second resonance chamber 120. Accordingly, the air introduced into the inlet 15 is moved to the first to third resonance chambers 110, 120, and 130 according to respective frequencies, and the first to third resonance chambers 110, 120, The intake air is discharged to the outside through the outlet 45 in a state in which the noise is reduced.

In this embodiment, as the air introduced through the inlet 15 passes through the outlet 45 and is discharged to the outside, the air flows in a direction in which the frequency range of the air decreases, It is possible to reduce the noise by tuning the frequency. As another example, it is also possible to reduce the noise by tuning the frequency of the air in the direction in which the frequency range of the air increases through the dimensional change of the resonator 1, that is, in the high frequency range from the low frequency range.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

1: Resonator
10: First outer pipe
20: second outer pipe
30: Extension pipe
40: Internal pipe
41: slit
100: Resonance room

Claims (8)

A resonator having resonance chambers for tuning frequencies and having different diameters of an inlet, which is an inflow passage of air, and an outlet, which is an outflow passage of air,
An outer pipe having a first outer pipe formed with the inlet and a second outer pipe formed with the outlet;
An inner pipe disposed inside the outer pipe and having a plurality of slits providing a path for air movement; And
And an expansion pipe which is formed to expand a diameter of a part of the outer periphery and is inserted between the outer pipe and the inner pipe and divides the resonance chamber into a plurality of pipes,
One end of the expansion pipe
And a distance which is a predetermined distance from the outer pipe so as to form a gap,
Wherein the expanding pipe includes an inner engaging portion engaged with the inner pipe, an outer engaging portion engaging with the outer pipe, and a plurality of bending portions extending in a direction orthogonal to the inner pipe and the outer pipe,
The plurality of bending portions may include a first bending portion disposed adjacent to the inlet and having one end connected to the internal coupling portion in a direction orthogonal to the first bending portion, one end connected to the internal coupling portion in an orthogonal direction, And a third bending portion disposed adjacent to the outlet and having one end connected to the external coupling portion in an orthogonal direction,
And the height of the second bent portion and the third bent portion is greater than the height of the first bent portion.
delete delete The method according to claim 1,
Wherein a distal end portion of the first bent portion is bent in a direction parallel to the extending direction of the first outer pipe so that the first outer pipe and the first bent portion are spaced apart by a predetermined distance,
And the distal end portion of the third bent portion is bent in a direction parallel to the extending direction of the inner pipe for engagement with the inner pipe.
The method according to claim 1,
Wherein the plurality of slits include a first slit disposed adjacent to the inlet and a second slit spaced a predetermined distance from the first slit with respect to a moving direction of the air,
Wherein the resonance chamber includes a first resonance chamber communicating with the gap, a second resonance chamber communicating with the first slit, and a third resonance chamber communicating with the second slit.
6. The method of claim 5,
Wherein the diameter of the outer pipe constituting one surface of the first resonance chamber has a value of 1.4 to 1.6 times the diameter of the inner coupling portion.
6. The method of claim 5,
And the height of the inner coupling portion is 0.3 times the diameter of the inner coupling portion.
6. The method of claim 5,
Wherein the width of the gap has a value of 0.04 to 0.12 times the diameter of the internal coupling portion.

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