KR101692579B1 - Muffler for Vehicle with Multi Path - Google Patents

Abstract

The present invention relates to a muffler for a vehicle having a plurality of flow passages for forming a plurality of flow paths from an inlet portion and an outlet portion of a muffler to exert a noise reducing effect when passing through a noise source medium.
An outer housing having an inlet portion and an outlet portion in both ends of the body portion; An inner housing having an inlet portion and an outlet portion provided at both ends of the main body portion, the main body portion having a plurality of extended portions formed in the outer housing and spaced apart from each other along the longitudinal direction; Wherein a plurality of cut-out holes are formed between the inlet and the outlet so as to communicate with the expanded portion at intervals along the longitudinal direction while passing through the inner housing, thereby forming a first flow path for noise reduction while passing the noise source medium Wow; A plurality of spaced apart circumferential portions are provided between the inlet portion of the outer housing and the inlet portion of the inner housing and between the outlet portion of the outer housing and the outlet portion of the inner housing so that noise is reduced while the noise- And a flow path divider for forming a second flow path between the outer housing and the inner housing to each of the inlet and outlet of the outer housing and the inner housing.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a muffler for a vehicle,

The present invention relates to a muffler for a vehicle having a plurality of flow paths, and more particularly, to a muffler having a plurality of flow paths extending to an inlet and an outlet of a silencer.

Generally, a muffler for a vehicle means a muffler that reduces noise passing through a duct or a pipe but keeps the flow through the muffler as much as possible. In a vehicle, the muffler is mainly used in an exhaust pipe or a turbocharger.

In addition, the silencer must provide the noise performance required for each frequency, the flow resistance should be within the allowable range, and the condition of ease of maintenance and reasonable price should be met.

These silencers can be broadly classified into a reflection type, an interference type, an interference reflection type, an absorbing type, an absorption type reflection type, and a resonance type depending on their structure and function. The reflective type silencer includes a partition for continuously arranging a plurality of spaces, A pipe is installed in the exhaust pipe to cut off the course of the pulsating exhaust gas several times, thereby attenuating the noise by the impact reflection action.

The interference silencer has a structure in which the exhaust pipe repeatedly branches and collects, so that the energy of the exhaust gas is weakened to remove the noise. However, the noise silencer is somewhat uneconomical because of the large number of noise pipes.

The interference reflex silencer is designed to attenuate the exhaust noise repeatedly while simultaneously reflecting the exhaust noise through several noise tubes and partitioned spaces. The absorption silencer is composed of a plurality of partition spaces, a partially perforated sound pipe and a porous sound absorbing material, The noise is attenuated by introducing the exhaust gas into the sound absorbing material charged into the partition space through the hole drilled in the pipe.

In addition, the resonator type silencer related to the present invention is configured to reduce the volume of the exhaust gas by using a helmholtz resonance principle by forming a multi-branched resonator into a proper size and shape at a specific frequency.

The turbocharger of the vehicle rotates the turbine using the kinetic energy of the exhaust gas, and the air is sucked by the impeller connected to the turbine, and the sucked air is in a pressurized state, that is, It enters the cylinder in the state of supercharged air.

On the other hand, in a compressor in which an impeller is incorporated, pulsation occurs, and the pulsation is transmitted along a feeder extending from the compressor to the cooler. The pulsation is amplified in the housing of the cooler, and the noise becomes larger.

Thus, in order to reduce the noise generated by the pulsation, a muffler is installed in the air supply line extending from the compressor to the cooler.

An example of a conventional muffler structure will be described in more detail with reference to the drawings.

FIG. 1 is a perspective view showing a structure of a conventional silencer, and FIG. 2 is an assembled cross-sectional view of FIG.

As shown in the drawing, a conventional muffler 1 includes an outer housing 10, an inner housing 20 provided inside the outer housing 10, And a pipe (30).

Of course, the connecting pipe 40 (the turbocharger air supply or vehicle exhaust pipe) is coupled (welded or the like) to both ends of the silencer 1.

The outer housing 10 includes a main body 11 and an inlet 12 and an outlet 13 at both ends of the body 11. The inlet 12 and the outlet 13 Has a smaller diameter than that of the main body portion 11 and has a shaft-like structure.

The inner housing 20 provided in the outer housing 10 has a body 21 and an inlet 22 and an outlet 23 at both ends of the body 21, The body portion 21 has a structure in which the expanding portions 21a are formed at intervals along the longitudinal direction.

In the case of, for example, an exhaust pipe, the exhaust gas passes through the pipe 30 passing through the inside of the inner housing 20. When the pipe 30 is installed in a turbocharger provided in the turbocharger, A plurality of cut-out holes 30a, 30b and 30c are formed between the inlet 31 and the outlet 32 of the pipe 30 at intervals along the longitudinal direction.

The conventional silencer 1 having such a structure has the inlet portions 12, 22 and 31 and the outlet portions 13 and 23 of the outer housing 10, the inner housing 20 and the pipe 30 32 are closely coupled to each other.

Therefore, the structure of the muffler is composed of three members (an outer housing, an inner housing, a pipe), and a structure having a single inlet and an outlet.

In this conventional silencer 1, when exhaust gas or air having a predetermined pressure passes through the pipe 30, the exhaust gas passes through the inlet portion 31 of the shaft-like structure while being unified, Through the incision holes 30a and 30b and 30c to communicate with the expanded portion 21a of the inner housing 20 provided on the outer surface of the pipe 30 to pass through the narrow portion and the extended portion, .

However, since the noise reduction effect by the conventional silencer structure is a multi-tube structure composed of three members, the noise reduction effect can not be exhibited to a high degree although it has a complicated structure.

Korean Patent Publication No. 10-1998-078638 (Publication date: November 16, 1998)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a multi- And a muffler for a vehicle having a flow path.

According to an aspect of the present invention, there is provided an image forming apparatus including: a main body; an outer housing having an inlet and an outlet at both ends of the main body;
An inner housing having an inlet portion and an outlet portion provided at both ends of the main body portion, the main body portion having a plurality of extended portions formed in the outer housing and spaced apart from each other along the longitudinal direction;
Wherein a plurality of cut-out holes are formed between the inlet and the outlet so as to communicate with the expanded portion at intervals along the longitudinal direction while passing through the inner housing, thereby forming a first flow path for noise reduction while passing the noise source medium Wow;
A plurality of spaced apart circumferential portions are provided between the inlet portion of the outer housing and the inlet portion of the inner housing and between the outlet portion of the outer housing and the outlet portion of the inner housing so that noise is reduced while the noise- And a flow path divider for forming a second flow path between the outer housing and the inner housing to each of the inlet and outlet of the outer housing and the inner housing.

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As described above, according to the present invention, in the muffler for a vehicle, the noise caused by the exhaust gas or the compressed air, which is the noise source medium passing through the inside of the muffler, can be remarkably reduced by having a plurality of channels while having a plurality of channels.

1 is a perspective view showing a conventional muffler structure.
2 is a cross-sectional view of the connection of Fig.
3 is a perspective view illustrating a muffler structure according to an embodiment of the present invention.
Fig. 4 is an assembled sectional view of Fig. 3. Fig.
5 is a sectional view taken along line AA in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The same reference numerals are given to the same constituent elements as those of the above-mentioned conventional art, and new constituent elements are given new numerals and explained in detail.

FIG. 3 is a perspective view showing a silencer structure according to an embodiment of the present invention, and FIG. 4 is a sectional view of the silencer of FIG. 3.

As shown in the drawing, the muffler 100 according to an embodiment of the present invention includes an outer housing 10, an inner housing 20 provided inside the outer housing 10, And a pipe 30 penetrating through the inner housing 20. As shown in Fig.

Of course, the connecting pipe 40 (a turbo charger or a vehicle exhaust pipe) is coupled (joined by welding or the like) to both ends of the muffler 100 according to an embodiment of the present invention.

The outer housing 10 includes a main body 11 and an inlet 12 and an outlet 13 in the direction of both ends of the body 11. The inlet 12 and the outlet 13, (13) has a smaller diameter than that of the main body (11).

The inner housing 20 provided in the outer housing 10 has a body 21 and an inlet 22 and an outlet 23 at both ends of the body 21, The main body portion 21 has a structure in which a plurality of the expanded portions 21a are formed at intervals in the longitudinal direction.

The pipe 30 has a cutout 30a, 30b, and 30c formed between the inlet 31 and the outlet 32 at intervals along the longitudinal direction.

The muffler 100 according to an embodiment of the present invention may be made of a metal material or a heat-resistant plastic material.

The muffler 100 according to the embodiment of the present invention is provided between the inlet 12 of the outer housing 10 and the inlet 22 of the inner housing 20 and between the outlet 12 of the outer housing 10 A plurality of path dividers 110 and 112 are provided in the circumferential direction and spaced apart from each other between the outer housing 13 and the outlet 23 of the inner housing 20.

In other words, the flow dividers 110 and 112 are spaced apart from each other and fixed between the outer housing 10 and the inner housing 20.

The muffler 100 according to an embodiment of the present invention is configured such that the flow dividers 110 and 112 are disposed between the inlet 12 of the outer housing 10 and the inlet 22 of the inner housing 20. [ A plurality of noise source media are provided between the outlet portion 13 of the outer housing 10 and the outlet portion 23 of the inner housing 20 at intervals in the circumferential direction, And the inlet 12 of the inner housing 20 by passing through the outer housing 10 and the inner housing 20 together with the first flow path 120 passing through the inside of the inner housing 20, (22) and the outlet portions (13) (23).

In other words, the oil dividers 110 and 112 divide the inner circumferential surfaces of the outer housing 10 and the expanded portion 21a constituting the main body portion 21 of the inner housing 20, A second flow path) is formed.

Therefore, when the noise source medium, for example, exhaust gas or air having a predetermined pressure passes through the pipe 30, the inside of the pipe 30 and the inner The first flow path 120 formed by the expanded portion 21a of the housing 20 and the flow path divider 110 formed between the outer housing 10 and the inlet portions 12 and 22 of the inner housing 20 And then flows through the second flow path 122.

The noise source medium passes through the position of the inlet portions 12 and 22 of the outer housing 10 and the inner housing 20 so that the noise source medium enters the interior, Passing through the expanded space in the narrow space while passing through the second flow path 122 between the expanded portion 21a of the housing 20 and the outer housing 10, so that the noise can be reduced by that much.

In other words, since pressure loss occurs due to passage through a space having an enlarged cross-sectional area at a position having a narrow cross-sectional area, a sound pressure loss occurs, so that the noise can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, But fall within the scope of the appended claims.

1: Silencer
10: Outer housing
11:
12:
13:
20: Inner housing
21:
21a:
22:
23:
30: pipe
30a, 30b, 30c: incision ball
31:
32:
40: connector
100: Silencer
110, 112: Euro divider
120: First Euro
122:

Claims (1)

An outer housing having an inlet portion and an outlet portion in both end directions of the body portion;
An inner housing having an inlet portion and an outlet portion provided at both ends of the main body portion, the main body portion having a plurality of extended portions formed in the outer housing and spaced apart from each other along the longitudinal direction;
Wherein a plurality of cut-out holes are formed between the inlet and the outlet so as to communicate with the expanded portion at intervals along the longitudinal direction while passing through the inner housing, thereby forming a first flow path for noise reduction while passing the noise source medium Wow;
A plurality of spaced apart circumferential portions are provided between the inlet portion of the outer housing and the inlet portion of the inner housing and between the outlet portion of the outer housing and the outlet portion of the inner housing so that noise is reduced while the noise- A flow path divider for forming a second flow path between the outer housing and the inner housing to each of an inlet portion and an outlet portion of the outer housing and the inner housing;
And a plurality of flow passages formed in the muffler.

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