KR20100131202A - Acoustic duct for aircleaner - Google Patents

Abstract

PURPOSE: An acoustic duct for an air cleaner is provided to enable the shape of a suction pipe to be maintained as established since a shape maintaining member is integrally connected to the suction pipe and the suction pipe is supported. CONSTITUTION: An acoustic duct for an air cleaner comprises a hard supply pipe(50), a suction pipe and a soft shape maintaining member. The supply pipe is directly connected to the air cleaner and supplies the external air to it. The suction pipe is connected to the supply pipe and absorbs the external air by a suction stroke at a high pressure. The suction pipe is formed as a soft sound-absorbing member and decreases the noise, which is generated by high-pressure suction force. The shape maintaining member is integrally connected to the suction pipe. The shape maintaining member shields the suction pipe and maintains the shape of the suction pipe as established. The shape maintaining member comprises a pipe type of cover(70), which has a noise hole(HL), and a fixing member.

Description

Acoustic Duct for Air Cleaner {ACOUSTIC DUCT FOR AIRCLEANER}

The present invention relates to an air cleaner duct of a vehicle, and more particularly, to an acoustic duct for an air cleaner that can maintain the shape of the duct in a set form while reducing noise generated during intake.

In general, an automobile inhales a mixer into a cylinder, and travels by using a driving force generated by repeating compression, ignition, and exhaust. Such automobiles generate driving force by the explosive force while the engine mixes and combusts fuel and air. Therefore, the automobile is provided with an intake and exhaust device for discharging the intake and combustion gas of the mixer in the engine.

The intake system consists of an air cleaner, a throttle body for mixing fuel and air, a surge tank for storing the mixer, and an intake manifold for distributing the mixer into the cylinder of the engine. Among these intake devices, the air cleaner removes fine dust contained in the air sucked into the cylinder and additionally removes intake noise generated in the intake cylinder. In such an air cleaner, a duct is connected to introduce external air through the duct. Therefore, the engine mixes and burns pure air with impurities removed from the fuel.

Here, as described above, the duct connected to the air cleaner is connected to the air cleaner, in which the plastic material supply pipe 1 is not shown, as shown in FIG. 1. The supply pipe 1 intakes air through the fiber intake pipe 12 connected to the end as shown by the high pressure suction force generated during the intake stroke of the engine. At this time, the intake pipe 12 attenuates noise while absorbing and releasing noise generated while the air is inhaled at high pressure by the suction power of the engine. Therefore, the duct 10 inhales air, reducing noise.

In this general duct 10, the intake pipe 12 flows as the intake pipe 12 is made of a fiber material. Therefore, the general duct 10 connects the flap shaped plastic flap wing 14a to the end of the intake pipe 12 as shown, and then connects the flange flap 14a with the not shown bolt to the inside of the engine room. Fix it to That is, in the general duct 10, the intake pipe 12 is fixed to the vehicle body through the flange wings 14a. Therefore, the intake pipe 12 intakes outside air in a fixed state inside the engine room.

However, since the general duct 10 as described above attenuates the noise only through the intake pipe 12, there is a problem that the noise cannot be smoothly reduced when the engine is driven at 3,000 rpm or more.

In addition, in order to fix the intake pipe 12, not only the flange blades 14a have to be manufactured separately, but also there is a problem that the flange blades 14a must be fixed with bolts.

In addition, the band clamp BC as shown in the drawing, which connects the intake pipe 12 and the flange blades 14a or the intake pipe 12 and the supply pipe 1 to each other, must be prepared. There is also the problem of clamping BC).

The present invention was created in order to solve the above-mentioned conventional problems, and is coupled to an intake pipe that inhales outside air at high pressure and reduces noise, and supports a intake pipe while maintaining a shape of the intake pipe in a set form. The purpose is to provide an acoustic duct for the air cleaner provided.

In addition, the present invention provides an acoustic duct for an air cleaner that is not only prefabricated to be connected to the supply pipe while the intake pipe is tense, but also configured to assemble a member for maintaining the shape of the intake pipe to the intake pipe. Another purpose is to:

In order to achieve the above object, an air duct for an air cleaner according to the present invention is a duct installed in an air cleaner of a vehicle, wherein one side of the air cleaner is directly connected to the air cleaner to supply external air to the air cleaner. ; An intake pipe connected to the other end of the supply pipe to intake external air at high pressure by a suction stroke of the vehicle, and made of a flexible sound absorbing material to attenuate intake noise generated by a high pressure suction force; It is integrally coupled to the intake pipe, and comprises a rigid shape holding member for shielding the intake pipe to maintain the shape of the intake pipe in a set form.

The intake pipe may be press-fitted with an interference fit while one end is expanded to the other side of the supply pipe, and may be firmly fixed by a screw.

The shape-retaining member may include, for example, a tubular cover that surrounds and surrounds an outer circumferential surface of the intake pipe and has a noise hole for emitting noise generated in the intake pipe; It may comprise a fixing member for fixing the end of the intake pipe inserted in the cover to the cover.

The cover, for example, is formed to correspond to the shape of one side of the intake pipe to be disposed on one side of the intake pipe to shield one side of the intake pipe, has a rim wing along the edge, the noise cover is formed one side cover; It is formed to correspond to the other side shape of the intake pipe while facing the one side cover is disposed on the other side of the intake pipe to shield the other side of the intake pipe, and has a border wing in close contact with the edge wing of the one cover, the noise The other side of the ball formed; It can be configured to include a coupling means for integrally coupling the other side cover and one side cover.

The coupling means, for example, by forming a hook on the edge of the cover of the one side, and forming a hook hole on the edge of the cover of the other side, while the hook is fastened to the locking hole in close contact with the one side cover and the other cover It is preferable to configure to combine.

The cover may further include a reinforcing rib that reinforces the stiffness of the edge blades provided on the one cover and the other cover while preventing the one cover and the other cover from being deformed.

The fixing member may include, for example, a fitting ring press-fitted and fixed to an end of the intake pipe while expanding an end of the intake pipe; A stopper protruding from an outer circumferential surface of the fitting ring and inserting the fitting ring by a length set in the intake pipe; It is preferable to comprise the fastener which fixes the stopper to the inside of the cover.

The fastener may be formed of, for example, a fitting protrusion protruding from the inner circumferential surface of the cover to be spaced apart, and to which the stopper formed on the fitting ring is fitted.

The present invention, it is necessary to further comprise a rotation preventing means for preventing the rotation of the cover.

The anti-rotation means may be configured to, for example, form a protrusion at an end of the supply pipe and a protrusion groove in the cover to prevent rotation of the cover while the protrusion is splined to the protrusion groove.

In addition, the present invention may further comprise a soundproof chamber that provides a space between the intake pipe and the cover to attenuate the noise emitted from the intake pipe.

The air duct for the air cleaner according to the present invention as described above, since the shape of the intake pipe is maintained by the shape retaining member, the air intake smoothly even when seated on the upper portion of the devices installed in the engine room without fixing the intake pipe to the vehicle body. do. Therefore, there is an effect that the parts and the fixing work for fixing the intake pipe as in the prior art can be omitted.

In addition, since the cover emits only a part of the noise through the noise hole in the state blocking the noise, there is an effect that can reduce the noise.

In addition, since the cover is divided into one side cover and the other cover is assembled by the coupling means consisting of hooks and engaging holes there is an effect that can easily install the cover.

In addition, as the reinforcing ribs are provided on the one side cover and the other side cover, the one side cover and the other side cover can be prevented from being deformed during molding, and when the one side cover and the other side cover are assembled, the edges formed on the one side cover and the other side cover are damaged. There is also an effect that can be prevented.

In addition, the fitting ring is fitted to the fitting protrusion and fixed, so that the fitting ring can be fixed to the cover in a prefabricated manner.

In addition, there is also an effect that can prevent the cover from rotating as the rotation prevention means consisting of the projection and the projection groove is formed in the supply pipe and the cover.

Hereinafter, an acoustic duct for an air cleaner according to an embodiment of the present invention will be described with reference to the accompanying drawings as follows, and FIG. 2 is an exploded perspective view of the acoustic duct for an air cleaner according to an embodiment of the present invention. 3 is a perspective view of the acoustic duct for the air cleaner shown in FIG. 4 is a longitudinal sectional view of the air cleaner acoustic duct shown in FIG. 3, and FIG. 5 is a graph showing the performance of the air cleaner acoustic duct according to the embodiment of the present invention.

Referring to FIG. 2, the acoustic duct IV for an air cleaner according to an embodiment of the present invention includes a supply pipe 50, an intake pipe 60, a cover 70, and a fitting ring 80 as shown. do.

The supply pipe 50 is formed in a curved shape as shown. The supply pipe 50 is made of a hard material such as plastic. That is, the supply pipe 50 is made of a material that does not deform the shape. The supply pipe 50 is connected to an air cleaner, one side of which is not shown, and the other side is connected to an intake pipe 60 to be described later, as shown. The supply pipe 50 has a flange 52 for restricting entry of the intake pipe 60 to the other side to which the intake pipe 60 is connected as shown.

Intake pipe 60 is one end is connected to the other side of the supply pipe 50 by interference fit. The intake pipe 60 is made of a fiber material such as wool or cotton fabric. In particular, the air intake pipe 60 is made of a fiber material such as porous or microporous, which is excellent in sound absorption or divergence of noise.

The cover 70 is formed to be divided as shown and is composed of one side cover 72 and the other side cover 74. That is, the cover 70 is divided into two parts. The one side cover 72 and the other side cover 74 is formed of a hard material such as plastic, and is disposed on one side and the other side of the intake pipe 60 as shown.

One side cover 72 is formed corresponding to one side shape of the intake pipe 60 as shown. One side cover 72 is formed with a rim wing 72c along the rim as shown. In addition, one side cover 72 has a sound hole (HL) as shown. Such a sound hole (HL) is composed of a plurality, as shown in the sum of the total size corresponds to an area of about 30% to 60% of the total area of one side cover (72). In other words, the sum total area of the noise holes HL, that is, the size of the noise holes HL when all the noise holes HL are collected, corresponds to an area of about 25% to 65% of the total area of the one-side cover 72. . The total area of the noise holes HL is preferably composed of about 30% of the total area of the one side cover 72. Because, when the total area of the noise holes (HL) is 30% or more, the noise generated in the intake pipe 60 is excessively dissipated to the outside, and when it is 30% or less, the noise generated in the intake pipe 60 is reduced. This is because it is insufficiently divergent.

One side cover 72 is a hook 72a is formed on the rim wing 72c as shown in the enlarged view "①" in the drawing. The hook 72a is formed in a state of facing the edge blade 74c of the other cover 74 to be described later, as shown.

The other cover 74 is opposite to the one side cover 72 around the intake pipe 60 as shown. The other cover 74 is formed to correspond to the other side shape of the intake pipe 60, as shown, is disposed on the other side of the intake pipe 60. The other cover 74 has an edge blade 74c in close contact with the edge blade 72c of the one side cover 72 as shown. In addition, the other side cover 74 has a noise hole (HL) as shown. The noise hole HL is preferably formed in a form corresponding to the one side cover 72, as shown.

As shown in the enlarged view "2" in the drawing, the other side cover 74 is formed with a locking hole 74a in the edge blade 74c. The locking hole 74a is formed in a state corresponding to the hook 72a of the one side cover 72 as shown.

The fitting ring 80 has a flange-shaped stopper 82 on its outer circumferential surface. The fitting ring 80 is fitted to the end of the intake pipe 60 as shown.

On the other hand, one side and the other cover 74 is formed with an inward flange-shaped fitting protrusion 70z formed inward at the end as shown in the enlarged view "③" in the drawing. In addition, one side and the other side cover 74 is formed with another fitting protrusion (PO) of a triangular form spaced apart from the fitting protrusion 70z of the inward flange form on the inner peripheral surface as enlarged. The fitting protrusions 70z and PO are spaced apart by a distance corresponding to the thickness of the stopper 82 formed in the fitting ring 80 described above.

On the other hand, the supply pipe 50, as shown in the projection 54b is formed at the end to which the intake pipe 60 is fitted. In addition, one side and the other cover 74, as shown in the projections (72b, 74b) corresponding to the aforementioned projection (54b) is formed at the end.

On the other hand, one side and the other cover 74 may be fastened to the screw (SC) as shown. Screw (SC) may be fastened to one end of the other cover 74 adjacent to the supply pipe 50 as shown. The screw (SC) fastened in this way is fastened to the end of the supply pipe 50 after passing through the other side cover 74 and the intake pipe 60. Therefore, the intake pipe 60 is firmly fixed to the supply pipe 50. Of course, the other side cover 74 is also firmly fixed to the end of the supply pipe 50 by a screw (SC). The screw (SC) may be fastened to the one side cover (72).

Alternatively, the screw SC may be fastened to the end of the other cover 74 adjacent to the fitting ring 80. The screw (SC) fastened in this way is fastened to the fitting ring (80) through the other side cover (74). Thus, the fitting ring 80 is firmly fixed to the end of the other cover 74. That is, such a screw (SC) is an element for fixing the fitting ring 80 to the cover (70). Of course, the screw (SC) can also be fastened to the end of the one side cover (72).

On the other hand, one side and the other cover 74 is formed with a reinforcing rib 74d along the edges (72c, 74c) as shown in the enlarged view "③" in the drawing. The reinforcing rib 74d not only prevents deformation of the one side cover 72 and the other side cover 74 when the one side cover 72 and the other side cover 74 are formed, as well as the rigidity of the edge wings 72c and 74c. Reinforce.

Referring to FIG. 3, the one side cover 72 and the other side cover 74 form a cylindrical shape while being integrally coupled as the edge wings 72c and 74c are in close contact with each other. At this time, one side cover 72 and the other side cover 74 shields one side and the other side of the intake pipe 60 described above. That is, one side cover 72 and the other side cover 74 shields while surrounding the outer circumferential surface of the intake pipe 60.

Such one side and the other side cover (72, 74) is integrally coupled as the hook 72a is fitted into the locking hole (74a) as shown in the enlarged view "④" in the drawing. In other words, one side and the other cover (72, 74) is assembled prefabricated. At this time, the reinforcing rib 74d firmly supports the one side cover 72 and the other cover 74 in close contact with each other to prevent the one side cover 72 and the other side cover 74 from being deformed. Therefore, the one side cover 72 and the other side cover 74 is smoothly coupled while preventing deformation or breakage of the edge wings 72c and 74c.

On the other hand, the projection 54b provided on the supply pipe 50 when the one side cover 72 and the other side cover 74 is coupled, as shown in the enlarged view "⑤" in the drawing, the one side cover 72 and the other side cover 74. Splined to the protrusion groove (72b, 74b) formed in.

Referring to FIG. 4, the intake pipe 60 is press-fitted with an interference fit while one end is extended to the other side of the supply pipe 50 as shown. In addition, the intake pipe 60 is fitted to the fitting ring 80 while the other end is expanded as shown. That is, the fitting ring 80 is press-fitted and fixed to the other end of the intake pipe 60 while expanding the other portion of the intake pipe 60. At this time, the fitting ring 80 is no longer inserted into the intake pipe 60 by the stopper 82.

The fitting ring 80 is sandwiched between the fitting projections PO, 70z formed on one side and the other cover 72, 74, the flange-shaped stopper 82, as shown enlarged. Thus, the fitting ring 80 is firmly fixed to the ends of one side and the other cover (72, 74). That is, the fitting ring 80 is fixed to the end of the one side and the other cover (72, 74) prefabricated. Of course, one end of the intake pipe 60 is press-fitted to the end of the supply pipe 50 as described above, the other end is fixed to the end of one side and the other cover (72, 74) through the fitting ring (80) Stay tense.

On the other hand, one side and the other cover (72, 74) is fitted only to the depth set in the supply pipe 50 as one end is supported by the flange 52 of the supply pipe (50). That is, the insertion depth of the one side and the other cover (72, 74) is limited by the flange 52.

On the other hand, one side and the other cover (72, 74) as shown in the inner peripheral surface is spaced apart from the intake pipe (60). Therefore, the soundproof chamber 70a is formed between the inner circumferential surfaces of the one side and the other cover 72 and 74 and the intake pipe 60. That is, a space is formed between the inner circumferential surface of the one side and the other cover (72, 74) and the intake pipe (60).

Referring to Figures 3 to 5 attached to the action of the air cleaner acoustic duct according to an embodiment of the present invention configured as described above are as follows.

Referring to Figure 3, one side and the other cover (72, 74) is coupled to the cylindrical as shown to shield the above-described intake pipe (60). At this time, one side and the other cover (72, 74) is enlarged as shown in the "④" hook 72a is coupled to be detachably assembled according to the engaging hole (74a).

Such one side and the other cover (72, 74) is prevented rotation as the projection (54b) of the supply pipe 50 is coupled to the projection groove (72b, 74b) as shown in the enlarged view (5). That is, the projections 54b and the projection grooves 72b and 74b are elements for preventing the rotation of the cover 70.

On the other hand, one side and the other cover (72, 74) is firmly fixed to the supply pipe 50 by a screw (SC).

Referring to FIG. 4, the intake pipe 60 intakes outside air by the high pressure suction force generated by the intake stroke of the vehicle while maintaining the tension state as shown. At this time, the intake pipe 60 absorbs the noise generated by the air to be inhaled by the material characteristics while emitting a part to the outside.

The noise emitted from the intake pipe 60 is attenuated while flowing through the space provided by the soundproof chamber 70a and then emitted to the outside through the noise hole HL formed in the one side cover 72 and the other side cover 74.

Meanwhile, the one side cover 72 and the other side cover 74 protect the intake pipe 60 by shielding the intake pipe 60 as shown, and prevent the shape of the intake pipe 60 from being deformed. The one side cover 72 and the other side cover 74 emits a part of noise only through the noise hole HL in a state in which the noise emitted from the intake pipe 60 is blocked from the outside. Therefore, the noise generated in the intake pipe 60 is reduced and diverged.

The one side cover 72 and the other side cover 74 is prevented by the resonance phenomenon as the appropriate amount of noise is leaked through the noise hole (HL). That is, one side cover (72) and the other side cover (74) when the noise is not emitted resonance occurs to cause a greater noise. However, the one side cover 72 and the other side cover 74 is not amplified because the noise is emitted through the noise hole (HL).

On the other hand, the supply pipe 50 supplies the air drawn into the intake pipe 60 to the air cleaner not shown. Thus, the air cleaner supplies pure air to the engine.

Referring to Figure 5, the air cleaner acoustic duct (IV) according to an embodiment of the present invention shows the performance characteristics as shown in (a) and (b) of the drawings. Here, (a) and (b) of the drawings are graphs showing the performance characteristics of the conventional general duct 10 and the duct IV according to the embodiment of the present invention for 1,500 cc vehicles and 3,000 cc vehicles. .

As shown, the acoustic duct (IV) for the air cleaner according to an embodiment of the present invention shows similar characteristics as the conventional duct 10 in the section of less than 3,000rpm as shown. However, in the section of more than 3,000rpm shows a lower noise characteristics than the conventional duct 10. In particular, the acoustic duct IV for an air cleaner according to an embodiment of the present invention exhibits lower noise characteristics than in a large vehicle. Therefore, the acoustic duct IV for the air cleaner according to the embodiment of the present invention has superior characteristics than the conventional duct 10.

In the air cleaner acoustic duct according to the embodiment of the present invention as described above, since the cover 70 protects the shape of the intake pipe 60, it is not necessary to fix the intake pipe 60 to the vehicle body. That is, the acoustic duct for the air cleaner according to the embodiment of the present invention smoothly inhales outside air even when the cover 70 is placed on top of the devices installed in the engine room. Therefore, the acoustic duct for the air cleaner according to the embodiment of the present invention does not require components or fixing work for fixing the intake pipe 60 as in the related art. In particular, the acoustic duct for an air cleaner according to an embodiment of the present invention exhibits excellent noise reduction characteristics when driving at high speeds of more than 3,000 rpm or when the engine is overloaded.

Since the above embodiments are merely illustrative of preferred embodiments of the present invention, the scope of application of the present invention is not limited to the above, and appropriate modifications are possible within the scope of the same idea. Therefore, since the shape and structure of each component shown in the embodiment of the present invention can be carried out by deformation, it is natural that the modification of the shape and structure belong to the appended claims of the present invention.

1 is a perspective view of a typical air cleaner duct;

2 is an exploded perspective view of an acoustic duct for an air cleaner according to an embodiment of the present invention;

3 is a perspective view of the acoustic duct for the air cleaner shown in FIG.

4 is a longitudinal sectional view of the acoustic duct for the air cleaner shown in FIG. And

5 is a graph showing the performance of the acoustic duct for an air cleaner according to an embodiment of the present invention.

<Description of Major Symbols in Drawing>

50 supply pipe

60: intake pipe

70: cover

72: one side cover

74: other side cover

80: fitting ring

82: stopper

HL: Noise Maker

SC: Screw

Claims (11)

In the duct installed in the air cleaner of the vehicle, One side is directly connected to the air cleaner is a rigid supply pipe 50 for supplying external air to the air cleaner; One end is connected to the other side of the supply pipe 50 to intake the outside air at high pressure by the suction stroke of the vehicle, and made of a flexible sound absorbing material to attenuate the intake noise generated by the high pressure suction force 60 ; And An acoustic duct for an air cleaner, which is integrally coupled to the intake pipe (60) and comprises a rigid shape retaining member that shields the intake pipe (60) and maintains the shape of the intake pipe (60) in a set form. The method of claim 1, wherein the intake pipe 60, Acoustic duct for an air cleaner, characterized in that the one end is expanded to the other side of the supply pipe 50 is press-fit and fixed by interference fit, and firmly fixed by a screw (SC). The method of claim 1, wherein the shape holding member, A cover 70 having a noise hole HL for shielding the outer circumferential surface of the intake pipe 60 and radiating noise generated from the intake pipe 60; And An acoustic duct for an air cleaner including a fixing member for fixing an end of the intake pipe (60) inserted into the cover (70) to the cover (70). The method of claim 3, wherein the cover 70, Correspondingly formed on one side of the intake pipe 60 and disposed on one side of the intake pipe 60 to shield one side of the intake pipe 60, and has a rim wing 72c along the edge, the noise One side cover 72 is formed with a ball (HL); While facing the one side cover 72 is formed corresponding to the other side shape of the intake pipe 60 is disposed on the other side of the intake pipe 60 while shielding the other side of the intake pipe 60, one side cover 72 The other side cover (74) having a rim wing (74c) in close contact with the rim wing (72c) of the; And Acoustic duct for an air cleaner including a coupling means for integrally coupling the other side cover (74) and one side cover (72). The method of claim 4, wherein the coupling means, A hook 72a is formed on the edge blade 72c of the one side cover 72, and a hook hole 74a is formed on the edge wing 74c of the other cover 74, so that the hook 72a is An acoustic duct for an air cleaner, characterized in that configured to couple the one side cover (72) and the other side cover (74) in close contact with the engaging hole (74a). The method of claim 4, wherein the cover 70, Reinforcing ribs 74d for reinforcing the rigidity of the edge wings 72c and 74c provided on the one side cover 72 and the other side cover 74 while preventing the one side cover 72 and the other side cover 74 from being molded. The acoustic duct for the air cleaner further includes). The method of claim 3, wherein the fixing member, A fitting ring 80 which is press-fitted and fixed to the end of the intake pipe 60 while expanding the end of the intake pipe 60; A stopper 82 protruding from an outer circumferential surface of the fitting ring 80 to insert the fitting ring 80 by a length set in the intake pipe 60; And An acoustic duct for an air cleaner including a fastener for fixing the stopper (82) to the inside of the cover (70). The method of claim 7, wherein the fastener, Acoustic for air cleaners, characterized in that the protrusion formed on the inner circumferential surface of the cover 70 is spaced apart, the fitting projection (PO, 70z) is fixed by the stopper 82 formed in the fitting ring 80 is fitted duct. The method of claim 3, wherein Acoustic duct for air cleaner further comprises a rotation preventing means for preventing the rotation of the cover (70). The method of claim 9, wherein the rotation preventing means, A protrusion 54b is formed at an end of the supply pipe 50 and a protrusion groove 74b is formed in the cover 70 so that the protrusion 54b is splined to the protrusion grooves 72b and 74b. An acoustic duct for an air cleaner, characterized in that configured to prevent the rotation of the cover (70). The method according to any one of claims 3 to 10, An acoustic duct for an air cleaner further comprises a soundproof chamber (70a) that provides a space between the intake pipe (60) and the cover (70) to attenuate the noise emitted from the intake pipe (60).

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