KR100456569B1 - Intercooler pipe for automobile - Google Patents

Abstract

The present invention relates to an automotive intercooler pipe, which excludes an intercooler pipe composed of a conventional rubber hose and an aluminum intercooler pipe, and based on polybutylene terephthalate (PBT) having excellent heat resistance and flexibility, The part is made of elastomer and the aluminum part is made of hard PBT material to form a plastic integral multilayer connection structure, and the cylindrical connection member has an efficient sealing structure at both ends of the pipe to prevent air leakage at the connection part. The present invention relates to an intercooler pipe for automobiles that can achieve a weight reduction and cost reduction effect and an effect of suppressing noise generation.

Description

Intercooler pipe for automobile

The present invention relates to an automotive intercooler pipe, and more particularly, to exclude existing rubber and aluminum intercooler pipe, and instead of polybutylene terephthalate (PBT), the rubber part is an elastomer (elastomer). ), The aluminum part is replaced with a hard PBT material to form a plastic integral multilayer structure, and by connecting the cylindrical connecting member having an efficient sealing structure at both ends of the pipe to prevent air leakage at the connecting part, the weight reduction and cost reduction effect In addition, the present invention relates to an automotive intercooler pipe capable of reducing noise.

In general, the intercooler pipe is a pipe connected between the turbocharger and the intercooler, and serves as a flow path for transferring the air discharged from the turbocharger to the intercooler. After the combustion of the unburned gas from the engine passes through the turbocharger In addition, the high temperature and high pressure gas is supplied to the engine combustion chamber through the intake manifold through the inlet intercooler pipe.

Recently, engine weight reduction is required to reduce automobile fuel efficiency, and at the same time, performance improvement and noise reduction are also emerging as problems, but currently, an intercooler pipe composed of aluminum and rubber is mainly used, which is disadvantageous in terms of weight and cost.

The configuration of the turbocharger intercooler pipe includes a rubber hose 110a mounted on the turbocharger side, a rubber hose 110b mounted on the intercooler side, and an aluminum pipe 120 connecting the two rubber hoses 110a and 110b. In the manufacturing process of the intercooler pipe 100, first, the aluminum pipe 120 is pulled out, cut and bent into a shape required for each vehicle, and then fixing of a separately manufactured metal material. The bracket 130 is welded and the surface is coated with paint for the purpose of preventing corrosion of the exterior of the part.

Next, the two rubber hoses 110a and 110b separately formed using the metal clamps 140a and 140b are connected to both sides of the aluminum pipe 120 to complete the same.

The reason why the intercooler pipe 100 is divided into an aluminum material and a rubber material is not only to withstand the severe vibration conditions transmitted through the vehicle body or the engine when the vehicle is being driven, but also to turbo both sides of the intercooler pipe. Plastic parts, such as rubber, are required to facilitate the connection of the connection members 150a and 150b for connection to the charger and the intercooler side. This is because a hard part is required to endure.

However, in the conventional intercooler pipe, the following problems are raised by using a metal pipe and a rubber hose.

Firstly, a process of injection molding a separate rubber hose, a bending process of drawing and bending an aluminum pipe, and a process of clamping to connect the aluminum hose and the rubber hose manufactured as described above. Cost increases due to air and material costs, and second, there is a problem that the weight of the vehicle body increases with the application of a relatively heavy weight high pressure rubber hose and metal pipes.

Therefore, the present invention has been made to solve the above problems, but based on polybutylene terephthalate (PBT) excellent in heat resistance and flexibility, the rubber part is made of an elastomer (elastomer) material, the aluminum part is By replacing the rigid PBT material, it forms a plastic integrated multilayer connection structure and connects the cylindrical connection member with the efficient sealing structure at both ends of the pipe to prevent air leakage at the connection part. It is an object of the present invention to provide an intercooler pipe for automobiles that can achieve a suppressing effect.

1 is an exploded perspective view showing a vehicle intercooler pipe and a connecting member according to the present invention;

Figure 2 is a perspective view of an automotive intercooler pipe according to the present invention

3 is a cross-sectional view taken along the line 'A-A' of FIG.

4 is a configuration diagram showing the noise measurement equipment

5 is a perspective view showing a conventional automotive intercooler pipe

<Explanation of symbols for the main parts of the drawings>

10: intercooler pipe 11a, 11b: soft part

12 hard part 13: fixing bracket

20a, 20b: connecting member 21: concave groove

22: engaging jaw 23: protrusion

30 pipe 31 convex portion

Hereinafter, the features of the present invention for achieving the above object are as follows.

The present invention comprises a soft part (110a, 110b) and a hard part 120 having a fixing bracket 130, the connection member 150a between the turbocharger and the intercooler located at the left and right ends of the hard part (120) In the car intercooler pipe is installed in the airtight connection through, 150b),

The soft parts 11a and 11b are made of an elastomer material based on polybutylene terephthalate (PBT), and the hard part 12 is made of a hard PBT material. 11a) and the hard part 12 and the soft part 11b are formed in a multi-layer connection structure integrated in a three-dimensional double extrusion blow molding process, and the connecting members 20a and 20b are made of silicon and the turbocharger A concave groove 21 formed around the outer circumferential surface so as to be fitted to the convex portion 31 formed along the circumferential direction on the outer circumferential surface of the pipe 30 on the intercooler side;

A catching jaw 22 formed of a cross-section of a 'c' shape with an upper end curved outward so that the intercooler pipe 10 can be fixed without being separated;

It has a predetermined length in the horizontal direction on the outer circumferential surface and is characterized in that it is configured in the form provided with at least one protrusion 23 formed in at least one number.

In particular, the intercooler pipe 10 is characterized in that the injection molding fixed bracket 13 is inserted into the mold of the hard part 12 is molded while being integral with the hard part 12 molding.

In addition, the fixing bracket 13 is characterized in that the glass fiber is 20 to 30% by weight reinforced PBT or nylon resin composite material.

Hereinafter, the configuration of the present invention with reference to the accompanying drawings in detail.

1 is an exploded perspective view showing a vehicle intercooler pipe and a connecting member according to the present invention, Figure 2 is a perspective view showing a vehicle intercooler pipe according to the present invention, Figure 3 is a cross-sectional view taken along the line 'A-A' of FIG. .

The present invention uses a polybutylene terephthalate (PBT) -based plastic material having excellent heat resistance and flexibility, but integrates a multi-layered connection structure to produce a three-dimensional extrusion blow molding process.

That is, the soft parts 11a and 11b installed at the front end portions of both sides of the intercooler pipe 10 are formed of an elastomer material based on polybutylene terephthalate (PBT), and an intermediate hard part. 12 is formed of a general polybutylene terephthalate (PBT) material, wherein the soft portion (11a, 11b) is about 90% of the thickness of the elastomer material, the hard portion 12 is thick About 90% of the structure is made of a general polybutylene terephthalate (PBT) material and has a multilayer connection structure in which the soft parts 11a and 11b and the hard part 12 are integrated in a mold.

Therefore, since the material of the existing intercooler pipe 100 is changed from aluminum to plastic, it can achieve about 30% weight reduction, and connects the existing soft parts 110a and 110b to the hard part 120. Since the metal clamps 140a and 140b can be removed, cost reduction of about 30% can be achieved according to the change of materials and methods, and the soft parts 11a and 11b and the hard part 12 are made of the same material and recycled. Excellent in terms of performance.

In addition, the fixed injection molding bracket 13 is a PBT or nylon resin composite material reinforced with 20 to 30% by weight of glass fiber, and is inserted into a mold when the intercooler pipe 10 is manufactured to form the intercooler pipe 10. At the same time, it is molded while being integrated with the hard part 12 of the intercooler pipe 10.

In addition, when connecting to the turbocharger and the intercooler side, the injection member 20a, 20b made of silicon material is separately injection-molded to prevent air leakage from the connection part, so that it can be assembled on both sides of the intercooler pipe 10. The connecting members 20a and 20b may be hermetically connected even in a simple manner of fitting and fixing because the soft parts 11a and 11b are made of a material having improved rigidity as compared to the existing soft parts 110a and 110b. As a connecting means, it has a cylindrical shape with an efficient sealing structure.

At this time, the concave groove 21 formed around the outer circumferential surface of the connecting member 20a, 20b is fitted to the convex portion 31 formed along the circumferential direction on the outer circumferential surface of the pipe 30, the intercooler pipe The upper end of the connection member 20a, 20b is formed with a 'b'-shaped locking jaw 22 of the upper end of the connection member 20a, 20b to be fixed without being separated, and the connection member 20a , 20b) is formed with at least one or more protrusions 23 having a predetermined length in the transverse direction at regular intervals in the longitudinal direction.

The invention consists of three, as shown in FIG.

On the other hand, the noise test evaluation of the intercooler pipe for automobiles according to the present invention will be described in more detail based on the following examples, the present invention is not limited thereto.

Example

As shown in FIG. 4 as a method for evaluating the noise test of the intercooler pipe according to the present invention, the noise measuring equipment is first used to generate a noise source from a speaker in an anechoic chamber, and the noise source is transmitted to the outside of the anechoic chamber through a test piece or a component. In order to measure the transmission loss, the measurement was performed by installing a microphone inside / outside the anechoic chamber. Specimens were prepared by different physical properties under the same conditions as the comparative example, and the physical properties of the specimens are shown in Table 1.

Prior to measuring the noise reduction effect in a real vehicle, a comparative example for evaluating the noise effect of a single product according to the material composition and measuring the transmission loss effect in a real vehicle state is provided in the soft parts 11a and 11b and the hard part 12. Is an intercooler pipe each composed of a rubber material and an aluminum material, and Examples 1 to 4 are the soft parts 11a and 11b and the hard part 12, which are composed of a PBT-based elastomer material and a general PBT material. As shown in the figure, the soft parts 11a and 11b separate the PBT-based elastomer material having different physical properties into the A material and the B material, respectively, and the hard part 12 is the C material of the PBT material. Therefore, each embodiment is configured such that the data value can vary.

That is, in Example 1, the soft parts 11a and 11b and the hard part 12 are each composed of A material and C material, and the second embodiment is composed of A + B (50:50) material and C material. , Example 3 is composed of A + B (50: 50) material and B material in turn, while the predetermined length of the specimen is formed in a bellows shape, Example 4 is composed of B material and A material in turn At the same time, the predetermined length of the specimen was formed in a bellows shape, and thus, the above five kinds of parts were subjected to a single-unit and actual vehicle noise evaluation experiment.

As shown in Table 2, as shown in the above experimental results, compared to the comparative example, the plastic intercooler pipe of Examples 2 to 4 caused disadvantageous results in terms of single-car and actual vehicle noise test results, but the embodiment as proposed in the present invention 1 can achieve almost the same result as the existing specification.

Accordingly, the automotive intercooler pipe according to the present invention can achieve cost reduction and weight reduction compared to the prior art, and is composed of the same material, which is excellent in terms of recycleability, and shows almost the same results as the conventional one in terms of noise suppression. It is an invention which has the outstanding effect also in terms of suppression.

As described above, the automotive intercooler pipe according to the present invention is based on polybutylene terephthalate (PBT) having excellent heat resistance and flexibility, and the rubber part is made of an elastomer material, and the aluminum part is a hard PBT. By replacing the material to form a plastic integral multilayer structure, and by connecting the cylindrical connecting member to both ends of the pipe to prevent air leakage, there are the following effects.

First, we achieve cost reduction of about 30% due to material and process changes,

Secondly, by reducing the material of the existing intercooler pipe from aluminum material to plastic material, the weight is reduced by about 30%.

Third, because the different materials are unified into a kind of material, the recycling property of the material is improved,

Fourth, the stiffness and vibration damping property of the material and the smooth property of the air flow passage are improved.

Fifth, the required temperature of the peripheral parts is lowered due to the low thermal conductivity of plastics, compared to conventional aluminum.

Claims (3)

Consists of a soft portion (110a, 110b) and a hard portion 120 is provided with a fixing bracket 130, the connection member (150a, 150b) between the turbocharger and the intercooler located at the left and right ends of the hard portion 120 In the car intercooler pipe is installed in a tightly connected via, The soft parts 11a and 11b are made of an elastomer material based on polybutylene terephthalate (PBT), and the hard part 12 is made of a hard PBT material. 11a) and the hard part 12 and the soft part 11b are formed in a multi-layer connection structure integrated in a three-dimensional double extrusion blow molding process, and the connecting members 20a and 20b are made of silicon and the turbocharger A concave groove 21 formed around the outer circumferential surface so as to be fitted to the convex portion 31 formed along the circumferential direction on the outer circumferential surface of the pipe 30 on the intercooler side; A catching jaw 22 formed of a cross-section of a 'c' shape with an upper end curved outward so that the intercooler pipe 10 can be fixed without being separated; An intercooler pipe for automobiles, characterized in that it has a predetermined length in the horizontal direction on the outer circumferential surface and has a protrusion 23 formed in at least one number with a predetermined interval in the vertical direction. The method of claim 1, wherein the intercooler pipe 10 is inserted into the mold of the hard part 12 is inserted into the mold of the hard part 12, the injection molding fixed bracket 13, characterized in that the molded part is molded and integrated at the same time. Automotive intercooler pipes. 3. The intercooler pipe according to claim 2, wherein the fixing bracket (13) is made of PBT or nylon resin composite having 20 to 30 wt% glass fiber reinforced.