KR101782448B1 - The vehicle patched intake duct and thereof manufacture method - Google Patents

Abstract

The present invention relates to a vehicle intake duct and a manufacturing method thereof and, more specifically, relates to a vehicle intake duct and a manufacturing method thereof, wherein the vehicle intake duct comprises: a hollow main body of which one side is connected to an intake port of an engine, and the other side is interconnected to the outside; an opening portion formed on an outer circumferential surface of the main body; and a sound absorbing pad provided in the opening portion. Therefore, without a resonator, vibration and noise generated in the intake duct can be reduced, and a structure of the intake duct is simply formed to increase productivity. Moreover, a space of an engine room is secured to improve practicality of design.

Description

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

The present invention relates to a patch-type intake duct for a vehicle and a method of manufacturing the same. The hollow main body has one side connected to an intake port of an engine, the other side communicating with the outside, an opening formed on the outer surface of the main body, So that vibration and noise generated in the intake duct can be reduced without providing a resonator, and the structure of the intake duct can be easily configured to increase the productivity, practicality of the design due to securing of the engine room, The present invention relates to an intake duct for a vehicle and a manufacturing method thereof.

The internal combustion engine is basically an engine that mixes fuel and oxygen, and the mixed fuel is supplied to the cylinder of the engine and is ignited. In this case, the engine generates power by converting a linear motion generated by an explosive force generated during ignition to a rotational motion.

In the internal combustion engine, it is necessary to supply oxygen. In a method of supplying oxygen to the engine, which is an internal combustion engine provided in the vehicle, the intake port is directed toward the running direction of the vehicle in consideration of the running direction of the vehicle. And is located inside the engine room.

The intake configuration in which oxygen is supplied to the internal combustion engine as described above has an effect of increasing the amount of outside air supplied to the inside of the engine according to the running speed of the vehicle, And thus has a characteristic suitable for supplying an increasing amount of oxygen.

However, due to the pulsation of the outside air supplied through the intake duct due to the vibration of the engine, the engine displacement, the engine speed, and the variable timing of the intake and exhaust valves, So that a vortex is generated.

The generated vortex is combined with the natural frequencies of the respective intake systems to generate resonance in a specific frequency band to generate discharge noise in the intake duct. The discharge noise can be radiated in the engine room, Causing radiation noise.

Therefore, in order to prevent such noise, conventionally, a chamber referred to as a resonator is attached to the intake duct, or the shape of the intake duct is changed to increase the internal resistance, thereby canceling the discharge noise.

However, since the resonator is constituted as described above, a considerable amount of space is allocated to the path where the intake duct is provided, and the structure of the intake duct is also complicated. Even if the resonator has the resonator, only a specific resonance frequency is limitedly removed A problem has occurred.

In recent years, as automobile technology has been developed, a variety of additional functions are mounted on the vehicle. In order to mount such functions, it is required to secure the space of the engine room. In addition, It is required to improve the noise suppressing device.

The following are representative conventional techniques for intake ducts that reduce conventional noise and vibration.

Korean Patent Laid-Open Publication No. 10-2016-0024435 discloses an intake duct of a vehicle. In order to reduce noise due to intake air, a plastic duct member at an upper portion is directly connected to a plastic duct And the structure to be joined is presented.

Korean Patent Laid-Open Publication No. 10-2009-0109817 discloses an air duct assembly for a vehicle, which divides an interior area of an air duct and adjusts the amount of air supplied from an air duct according to the amount of air required for low- And the noise is also reduced through this, thereby suggesting a structure of the air duct in which the noise due to the inflow of external air is suppressed without installing the resonator.

However, in Korean Patent Publication No. 10-2016-0024435, the coupling structure of the intake duct for noise reduction is changed. However, since the resonator is still provided and used, it is difficult to secure the space of the engine room due to the resonator of the engine room. .

Also, Korean Patent Laid-Open Publication No. 10-2009-0109817 does not have a resonator, so that a space for an engine room can be ensured, but the structure of the air duct is complicated, and foreign substances such as small sand It is difficult to operate, and the manufacturing process is complicated and the production cost is increased.

Therefore, in order to secure a space in the engine room, the resonator is removed, but the structure of the air duct is not so complicated, and it is necessary to develop a technology that is simple in manufacturing and excellent in productivity.

Korean Patent Publication No. 10-2016-0024435 (Feb. Korean Patent Publication No. 10-2009-0109817 (2009.10.21)

The intake duct for a vehicle and the method of manufacturing the same according to the present invention are intended to solve the problems of the related art, and the prior art has a resonator for preventing noise and vibration of the intake duct, There is a disadvantage in that only the vibration of a specific resonance frequency is limited. In order to prevent noise and vibration of the intake duct without the resonator, the structure of the intake duct becomes complicated,

The present invention proposes a solution to this problem and provides an intake duct for a vehicle and a method of manufacturing the same that can reduce the noise and vibration generated in the intake duct comprehensively and without complicating the structure of the intake duct without providing a resonator The main purpose is to do.

In order to realize the above-described object, the present invention has a hollow main body, one side of which is connected to an intake port of the engine, the other side of which is communicated with the outside, an opening formed at least one on the outer circumferential surface of the main body, The present invention provides a patch-type intake duct for a vehicle, comprising:

A method for manufacturing a patch-type intake duct for a vehicle, the method comprising: a first step of manufacturing a sound absorbing pad; a first step of forming a sound absorbing pad, And a second step of placing the sound absorbing pad in a molding groove formed with an opening of the body mold and injecting a main material to mold the main body.

According to the present invention, there is provided an intake duct for a vehicle and a method of manufacturing the same, wherein a sound absorbing pad is disposed inside a main body forming an intake duct to simplify the structure of the intake duct, Therefore, it is possible to provide a space inside the engine room without a resonator, and it is possible to freely configure a duct of the intake duct, So that the load of the load is also reduced.

1 is a perspective view of an intake duct for a vehicle according to a preferred embodiment of the present invention;
2 is a perspective view of a main body of an intake duct for a vehicle according to a preferred embodiment of the present invention.
3 is a conceptual view illustrating a structure of a main body, an opening, and a sound absorbing pad of an intake duct for a vehicle according to a preferred embodiment of the present invention.
4 is a flowchart illustrating a manufacturing procedure of an intake duct for a vehicle according to an embodiment of the present invention.
5 is an exploded perspective view of an intake duct for a vehicle according to a preferred embodiment of the present invention.
6 is a flowchart illustrating a manufacturing procedure of an intake duct for a vehicle according to a preferred embodiment of the present invention.

The present invention relates to a patch-type air intake duct for a vehicle and a method of manufacturing the same, which comprises a hollow main body, one side of which is connected to an intake port of an engine, the other side of which is communicated with the outside, an opening formed on the outer circumferential surface of the main body, And a sound absorbing pad provided on the base body.

A method for manufacturing a patch-type intake duct for a vehicle, the method comprising: a first step of manufacturing a sound absorbing pad; a first step of forming a sound absorbing pad, And a second step of placing the sound absorbing pad in a molding groove formed with an opening of the body mold and injecting a main material to mold the main body.

According to the present invention, it is possible to increase the load of the engine room and the vehicle load due to the resonator, reduce the noise of a specific frequency, and configure the intake duct in the configuration for omitting the resonator. I want to solve problems that are complicated.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, embodiments of a patch type intake duct for a vehicle and a method of manufacturing the same according to the present invention will be described in detail with reference to the accompanying drawings.

First, the main body 10 of the intake duct 100 of the present invention

One end of the snorkel 50 is connected to the intake port of the engine. The other end of the snorkel 50 is connected to the outside. The end of the snorkel 50 is connected to the outside.

The cross-sectional area of the inner diameter of the main body 10 is narrower than that of the inlet cross-sectional area of the snorkel 50, so that the snorkel 50 As the flow velocity increases at the inlet of the main body 10, the flow of the outside air supplied to the engine is amplified.

Meanwhile, the main body 10 serves as a passage for transmitting the air sucked from the outside to the engine. The air introduced through the main body 10 is transferred to a device such as a vaporizer to be mixed with the fuel, and the fuel mixed with the air in the vaporizer is supplied to the engine to operate the engine.

Therefore, the internal flow path of the main body 10 is connected to the intake line through which the air is supplied to the engine, so that the operation state of the engine such as the vibration of the engine, the displacement of the engine, the rotation speed of the engine, It may be affected and a phenomenon such as a pulsating phenomenon may occur.

When a pulsating phenomenon occurs in the inner flow path of the main body 10, the inflow air generates a vortex due to a pulsation phenomenon, and the generated vortex causes a collision with a wall surface of the inner flow path of the main body 10, Thereby causing noise and vibration.

2 and 3, the main body 10 of the present invention has the opening 20 formed on the outer peripheral surface of the main body 10 so as to reduce vibrations and noise generated in the internal flow path, And the sound absorbing pad 30 is provided in the opening 20 so that vibration and noise generated in the internal flow path are absorbed and reduced by the sound absorbing pad 30, (20) in the form of a vibrating wave.

therefore. The main body 10 of the present invention is configured such that the opening 20 is formed and the outer periphery of the main body 10 is not communicated with the interior of the main body 10 by the sound absorbing pad 30, It is possible to prevent the air from flowing out through the opening 20 and to absorb the noise and vibration generated from the introduced air by the sound absorbing pad 30. [

In the main body 10 of the present invention, a sound absorbing pad 30 is provided in the opening 20, and a sound absorbing cover (not shown) is formed on the upper portion of the opening 20 to protect the sound absorbing pad 30 40 and a detailed description of the sound-absorbing cover 40 will be described later with the opening 20.

The main body 10 of the present invention is preferably constructed using a rigid material in order to reduce noise and vibration by providing the opening 20 and the sound absorbing pad 30, 10 is preferably made of a sintering material.

As described above, the intake duct 100 of the present invention is provided with the sound absorbing pad 30 made of a sintered material in the main body 10 made of a rigid material, The sound absorbing pad 30 absorbs the shock due to the flow of the vortex to reduce the vibration and the noise caused by the vortex is also reduced by the sound absorbing pad 30 being sounded and absorbed, The intake duct 100 of the present invention can reduce vibration and noise.

In addition, the material constituting the main body 10 may be a conventionally used rigid synthetic resin material, more preferably polypropylene, especially homopolypropylene, polyethylene, especially high density polyethylene, Nitrile-butadiene-styrene copolymer (ABS) may be used.

Specifically, homopolypropylene or high-density polyethylene may be used to improve mechanical properties. Any material may be used as long as the main body 10 has a density of 0.03 to 0.1 g / cm 3, and the density is 0.03 g / Cm < 3 >, the mechanical properties and durability of the main body decrease, and when it exceeds 0.1 g / cm < 3 >, the weight increases and the life due to vibration decreases.

Next, the openings 20 of the present invention

One or more sound absorbing pads 30 are formed on the outer surface of the main body 10 to be described in detail later.

As shown in FIG. 3, the opening 20 is provided with a sound absorbing pad 30, and the sound absorbing pad 30 is used as a conventional soundproofing material. The sound absorbing pad 30 is formed of a vortex generated in a flow path inside the main body 10, So that the vibration wave against the absorbed shock is discharged to the outside through the opening 20, and the noise generated from the inside due to the sound absorption and the car audio is also blocked.

Actually, as a result of a test applied to an automobile (a displacement of 1000 cc and a displacement of 2000 cc), it was found that the intake duct of the present invention has a sound absorption efficiency of 20 to 30% as compared with the conventional intake duct without an opening.

It is understood that this is an effect due to the structural advantage of the intake duct as a result of applying the same material nonwoven fabric.

The upper portion of the opening 20 is further provided with a sound absorbing cover 40 formed in a lattice structure to protect the sound absorbing pad 30 provided in the opening 20 from an external impact.

The circumference of the opening 20 formed in the main body 10 protrudes from the outer circumferential surface of the main body 10 and the circumference of the protruded opening 20 The sound absorbing cover 40 covering the opening 20 is formed on the basis of the end of the sound absorbing cover 40.

Therefore, the sound absorbing cover 40 is configured to protrude from the outer circumferential surface of the main body 10 so that the sound absorbing pad 30 is provided on the main body 10 without being interfered with by the sound absorbing cover 40 So that the main body 10 can be provided.

When the sound absorbing pad 30 is provided in the inner flow path of the main body 10, the sound absorbing pad 30 may be thicker than the outer peripheral surface thickness of the main body 10, So that the wall surface of the flow path and the inner surface of the sound absorbing pad 30 coincide with each other.

That is, since the sound absorbing pad 30 does not protrude to the inside of the flow path and does not physically interfere with the intake flow passing through the flow path, the flow rate of the intake flow is preserved and vortices are prevented from being generated Effect.

Since the inner surface of the sound absorbing cover 40 is in contact with the outer surface of the sound absorbing pad 30 so that the sound absorbing pad 30 is attached to the sound absorbing cover 40 during molding of the main body 10, (30) is firmly coupled to the main body (10).

In addition, the lattice structure of the sound absorbing cover 40 may be formed in a mesh shape to allow the vibration generated in the sound absorbing pad 30 to be discharged to the outside, But it may be formed into a honeycomb shape or a logo of a manufacturer's logo in order to add an aesthetic effect to the appearance of the main body 10, more preferably.

It is preferable that the sound absorbing cover 40 is integrally formed when the main body 10 is molded but the sound absorbing cover 40 is not formed when the main body 10 is molded, So that the sound absorbing cover 40 can be detachably attached to the outer surface of the main body 10.

That is, a coupling groove or coupling protrusion is formed on the outer surface of the main body 10, and a coupling groove or coupling protrusion provided on the outer surface of the main body 10 is formed on the inner surface of the sound- So that the sound absorbing cover 40 can be detachably attached to the outer surface of the main body 10.

Next, the sound absorbing pad 30 of the present invention

The opening 20 formed in the main body 10 may be formed in a patch shape and may be formed as an integral part of the main body 10 when the main body 10 is manufactured. So as to close the opening 20.

The structure in which the sound absorbing pad 30 is coupled to the main body 10 is configured such that the sound absorbing pad 30 is inserted into the opening 20 at the time of manufacturing the main body 10, And the sound absorbing pad 30 completely seals the opening 20 so that the inside does not communicate with the outside through the opening 20. [

The reason why the main body 10 and the sound absorbing pad 30 are constructed as described above is that the noise and vibration generated due to the swirling flow of the air sucked into the internal flow path of the main body 10 are counted out through the opening .

Therefore, the sound absorbing pad 30 is separately prepared in advance and is positioned in a molding groove in which the opening 20 is provided by the same method as the insert injection when the main body 10 is manufactured, so that the molding of the main body 10 It is preferable to be configured to be integrally molded.

In addition, it is preferable that the sound absorbing pad 30 is made of a sintered material having a weaker rigidity than that of the main body 10 in order to absorb vibrations and noise generated in the main body 10.

That is, the noise and vibration generated in the main body 10 are generated when the vortex generated due to the pulsation collides with the inner surface of the main body 10. At this time, in the main body 10, When the sound absorbing pad 30 of a material having a weaker rigidity than the sound absorbing pad 10 is provided, the sound absorbing pad 30 can absorb the noise and vibration generated by the eddy current, Noise and vibration are reduced.

In addition, the sound absorbing pad 30 is a sound absorbing material used in automobiles, which can reduce the material cost and improve the sound absorption and sound insulation performance, and is made of PET (polyethylene terephthalate) and LMF melting fiber, and the mixing ratio may be 70 to 90% by weight of PET and 10 to 30% by weight of LMF. If the LMF is out of the above range, too much or too little use of the LMF decreases the formability and thus the sound absorbing and sound insulating performance of the manufactured sound absorbing pad is lowered. Therefore, it is preferable to mix them within the above range.

Next, a manufacturing method of a patch-type vehicle air duct for a vehicle, in which one side of the present invention is connected to an intake port of an engine, the other side is communicated with the outside, and the main body 10 has one or more openings 20 formed on an outer circumferential surface thereof,

4, the sound absorbing pad 30 is placed in a molding groove formed with the first step S10 of manufacturing the sound absorbing pad 30 and the opening 20 of the main body mold, and the main material is injected And a second step (S20) of molding the main body.

Since the main body 10 should be integrally formed with the sound absorbing pad 30, it is preferable that the main body 10 is formed by an insert injection method in which the sound absorbing pad 30 is inserted into the main body 10 when the main body 10 is molded.

That is, it is possible to provide a mounting part in which the sound absorbing pad 30 can be mounted in a molding groove where the opening 20 is located in the mold of the main body 10, and after the sound absorbing pad 30 is mounted on the mounting part, The main body 10 integrally formed with the sound absorbing pad 30 is formed.

The main body to be injected in molding the main body 10 may be a rigid synthetic resin material, more preferably a polypropylene, particularly a homopolypropylene, a polyethylene, particularly a high density polyethylene, an acrylonitrile-butadiene- Styrene copolymer (ABS) may be used.

Meanwhile, in the first step S10 of manufacturing the sound absorbing pad 30, the material forming the sound absorbing pad 30 may be manufactured by compressing and repelling water-repellent coating. Examples of the material used include PET (polyethylene terephthalate polyethylene terephthalate) and LMF (low melting point fiber, low melting fiber) are used as a material, and the mixing ratio may be 70 to 90% by weight of PET and 10 to 30% by weight of LMF.

Meanwhile. In the main body molding of the present invention, the main body mold is constituted by the first main body mold and the second main body mold and the first main body 11 And the second main body 12 are separately formed and then joined and formed into a tubular shape, it is possible to have an effect of improving work efficiency and efficiency.

Accordingly, in the second step S20, as shown in FIGS. 5 and 6, the main body mold is constituted by the first main body mold and the second main body mold, respectively,

 A first main body molding step S21 for molding the first main body 11 by inserting the absorbing pad 30 into the molding groove formed with the opening 20 of the first main body mold and injecting the main material;

A second main body molding step S22 for molding the second main body 12 by inserting the sound absorbing pad 30 into the molding groove formed with the opening 20 of the second main body mold and injecting the main material .

In the second step, after the second main body forming step S23, the first main body 11 and the second main body 12 are brought into contact with each other, heated, compressed and cooled to form the tubular main body 10, (S23).

That is, the first main body 11 and the second main body 12, which are formed by the first main body forming step S21 and the second main body forming step S22, When the separated cross-sections are heated and gradually compressed, the separation points are melted and adhered to each other. At this time, when heating is stopped and cooling is performed, the manufacture of the main body 10 having one pipe shape is completed .

The main body 10 formed by the above-described methods is subjected to an additional assembly step S30 in which the auxiliary parts such as the snorkel 50 are engaged, and the intake duct 100 for supplying outside air to the engine is completed .

Therefore, since the intake duct according to the present invention can be simply manufactured, the production efficiency can be improved, and the noise generated from the intake duct can be effectively prevented from being damaged by the noise and sound absorption And thus it is possible to remove the conventionally provided resonator.

In addition, the resonator can be removed, the space inside the engine room can be easily secured, the load of the vehicle can be reduced, and the duct structure of the intake duct can be freely configured, thereby facilitating the design of the interior design. It is possible to improve the aesthetics and the like.

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, but, on the contrary, But may be embodied in other forms.

100: Intake duct
10: Main body
11: Main body 1
12: Second main body
20: opening
30: Sound absorbing pad
40: sound absorption cover
50: Snorkel
S10: First step S20: Second step
S21: First main body molding step
S22: Second main body molding step
S23: Coupling step
S30: Additional assembly steps

Claims (9)

delete delete delete delete A hollow main body 10 having one side connected to the intake port of the engine and the other side connected to the outside; An opening 20 formed on the outer circumferential surface of the main body 10; And a sound absorbing pad (30) provided in the opening (20), the patch duct comprising:
The main body (10) includes a sound absorbing cover (40) formed in a lattice structure on the opening (20); Respectively,
The sound absorbing pad 30 is formed integrally with the main body 10 when the main body 10 is manufactured,
The main body 10 is made of any one or more of polypropylene, polyethylene, acrylonitrile-butadiene-styrene copolymer, and has a density of 0.03 to 0.1 g /
The sound absorbing pad 30 is made of a mixture of PET (polyethylene terephthalate) and LMF (low melting fiber), and is made of 70 to 90% by weight of PET, 10 to 30% by weight of LMF Wherein the air inlet duct is formed in a substantially cylindrical shape. delete delete delete And a main body (10) having one side connected to an intake port of the engine and the other side connected to the outside and having at least one opening (20) formed on the outer circumferential surface thereof,
A first step S10 of producing a sound absorbing pad 30 of 70 to 90 wt% of PET and 10 to 30 wt% of LMF;
The sound absorbing pad 30 is placed in a molding groove in which the opening 20 of the main body mold is formed and a polypropylene, polyethylene or acrylonitrile-butadiene-styrene copolymer having a density of 0.03 to 0.1 g / Or a second step (S20) of molding the main body by injecting the main material of one or more of the mixtures,
In the first step S10, the material forming the sound absorbing pad 30 is compressed and water repellent coated,
In the second step S20, the main body mold is composed of a first main body mold and a second main body mold,
A first main body molding step (S21) for molding the first main body (11) by receiving the sound absorbing pad (30) in a molding groove formed with the opening part (20) of the first main body mold and injecting main material;
A second main body molding step S22 for molding the second main body 12 by receiving the sound absorbing pad 30 in the molding groove formed with the opening 20 of the second main body mold and injecting the main material Respectively,
After the second main body molding step S22,
(S23) for forming the tubular main body (10) by heating, compressing and cooling the first main body (11) and the second main body (12) while pressing them together (Manufacturing method of patch air intake duct for vehicle).

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