KR102378197B1 - Sealing member of a valve of a vechicle and a comprising the EGR valve - Google Patents

Abstract

The present invention relates to a sealing member of a vehicle valve and an EGR valve for a vehicle including the same, and more particularly, by improving a sealing effect between an upper housing and a lower housing to cool the heat circulating therein, leakage of coolant and penetration of foreign substances It was invented so that durability and marketability can be improved by completely blocking the
According to the present invention, in the sealing member of a vehicle valve, the sealing member is seated on the upper surface of the lower housing and has a rim portion in which bolt holes are formed, and a through hole in the inner center while maintaining a predetermined distance from the rim portion. A first gasket integrally connected to the formed central portion by a plurality of connecting pieces, an edge portion in close contact with the lower surface of the upper housing and in which bolt holes are drilled, and an inner side while maintaining a predetermined distance from the edge portion Provided are a sealing member for a vehicle valve and a vehicle EGR valve including the same, comprising a second gasket that is integrally connected to a central portion having a through hole in the center with a plurality of connection pieces and is in close contact with the first gasket.

Description

Sealing member of a valve for a vehicle and an EGR valve for a vehicle including the same

The present invention relates to a sealing member of a vehicle valve and an EGR valve for a vehicle including the same, and more particularly, to improve a sealing effect between an upper housing and a lower housing to cool the heat circulating therein. It was invented so that durability and marketability can be improved by completely blocking the

Exhaust gas of automobiles is compressed by the fuel at high temperature and high pressure in the cylinder, expanded, and then discharged to the atmosphere through the exhaust manifold.

Exhaust gas is mostly water vapor and carbon dioxide, and other harmful substances such as carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx) are included.

The exhaust gas recirculation system (EGR) returns a part of the exhaust gas back to the intake manifold to reduce nitrogen oxides in the exhaust gas and lowers the combustion temperature when the mixture is combusted to reduce the amount of nitrogen oxides (NOx) produced. to reduce

That is, the nitrogen oxide (Nox) can reduce the amount of generation by lowering the combustion temperature, and since this combustion temperature is most affected by the combustion rate, the density is reduced without changing the air-fuel ratio of the cylinder mixer itself.

Therefore, when the combustion rate is lowered and the increase in the combustion temperature is suppressed, it is possible to reduce nitrogen oxides as a result.

Such an exhaust gas recirculation valve (hereinafter referred to as an 'EGR valve') is installed between the exhaust manifold and the intake manifold, and opens and closes the passage by the control of the EGR valve only in rotations other than idle and warm-up.

It does not operate before idling and warm-up, but at rotations other than idling and warm-up, the EGR valve is opened according to the amount of opening of the throttle valve to recirculate a part of exhaust gas to the intake manifold of the engine for combustion while minimizing the reduction in engine output as much as possible. By lowering the temperature, it plays a role in reducing the emission of nitrogen oxides (Nox).

On the other hand, the EGR valve includes a lower housing for sending a portion of exhaust gas to the cylinder after introducing it through a pipe, and an upper housing installed on the lower housing to control the flow of exhaust gas in which a valve and a control circuit are accommodated and A sealing member installed between the lower housing and the upper housing is included.

The configuration of this EGR valve is shown in Korean Patent No. 10-1225681.

The lower housing of the EGR valve has an inlet and an outlet through which exhaust gas flows, respectively, and a valve device that selectively opens and closes the inlet and a drive motor that induces reciprocating motion of the valve device is provided inside the upper housing. .

The valve device further includes a valve plate selectively blocking the exhaust gas inlet, a valve stem connected to the valve plate, a roller provided on the upper surface of the valve stem, a cam having a cam groove through which the roller is movable, and a shaft connected to the cam and a gear train and a driving motor (not shown) coupled to the gear train.

In addition, a moving passage through which the valve stem moves is provided in the upper housing, and the valve stem passes through the moving passage, and the gas is prevented from being directed in the direction of the actuator through the packings.

In addition, while guiding the vertical movement of the valve stem, a bushing-type stem guider for supporting the valve stem is vertically provided.

On the other hand, the upper housing is molded to have an opening on one side so that each of the above-described components and electronic components can be accommodated therein and assembled, and the opening is closed by a cover.

Conventionally, as a means for sealing the gap between the upper housing and the lower housing, a sealing member having a relatively thin thickness and a sheet structure of a certain thickness is installed, and is mainly fastened in several places through bolts.

In addition, since the contact surfaces of the upper and lower housings, which are pressed from the upper and lower sides, respectively, on both sides of the sealing member are made of flat surfaces, it is airtight with the pressing force that is in surface contact with the sealing member having a sheet structure and is fastened through bolts. is maintaining

However, the upper housing and the lower housing may be slightly bent depending on machining precision, and thus a minute gap may be generated when they come into contact with the sealing member.

In addition, the tightening force is strong at a position close to the bolt, and the tightening force is relatively weak at an intermediate position between the bolt and the bolt. became the cause

Therefore, there is a problem in that durability and performance of the EGR valve is deteriorated due to the weakening of airtightness.

Domestic Registered Patent Publication No. 10-1952253 (Registration Date: February 20, 2019) Domestic Registered Patent Publication No. 10-1896338 (Registration Date September 03, 2018)

The present invention is to solve this problem, and in detail, a sealing member of an EGR valve for a vehicle that can exhibit an excellent airtight effect in the entire area of a sealing member for blocking a gap between an upper housing and a lower housing, and a vehicle including the same It is an object to provide an EGR valve.

Another effect of the present invention is to prevent the outflow of cooling water for cooling the heat of exhaust gas circulating inside, and to prevent condensed water or foreign substances from penetrating into the valve, and to prevent corrosion of sliding parts by condensed water. An object of the present invention is to provide a sealing member of the EGR valve and an EGR valve for a vehicle including the same.

Another effect of the present invention is to provide a sealing member of an EGR valve excellent in durability and marketability by improving airtightness, and an EGR valve for a vehicle including the same.

In the present invention for achieving this object, in the sealing member of a vehicle valve, the sealing member is seated on the upper surface of the lower housing to form an rim portion in which bolt holes are formed, and a predetermined distance from the rim portion is maintained. A first gasket integrally connected to a central portion in which a through hole is formed in the center of the furnace by a plurality of connecting pieces, an edge portion in close contact with the lower surface of the upper housing and in which bolt holes are drilled, and a predetermined distance from the edge portion It provides a sealing member of a valve for a vehicle, characterized in that it is integrally connected with a plurality of connecting pieces to a central portion in which a through hole is drilled in the inner center in a state of maintaining the second gasket and is configured with a second gasket in close contact with the first gasket.

The first gasket has inclined surfaces formed on the edge portion and the center portion, respectively, so that protrusions protruding toward the lower housing together with the connecting pieces are provided. It is characterized in that each protrusion protruding toward the housing is provided.

It is characterized in that a plurality of legs are integrally provided around the second gasket to determine a position to be assembled while hanging on the upper surface of the flange of the upper housing or in contact with the side of the flange.

A hooking bent portion is formed on the upper end of the legs, and a support piece is provided on the hooking bent portion of the leg to be hooked on the upper surface of the flange of the upper housing.

Assembly protrusions are integrally bent and molded on the rim of the second gasket, and fitting protrusions are provided on the rim of the first gasket to have positions and shapes corresponding to those of the assembly protrusions to fit inside the assembly protrusions. characterized.

In addition, the present invention is a lower housing provided with a gas flow path for sending a part of the exhaust gas to the cylinder after introducing a portion of the exhaust gas through the pipe, and is installed on the lower housing and connected to the valve plate to selectively block the exhaust gas passage. It includes a valve stem and a drive motor coupled to a gear train for driving the valve stem, an upper housing provided with a stem guider for supporting the valve stem, and a sealing member installed between the lower housing and the upper housing. In the configuration, a cooling water is provided in the lower housing to cool the excessive rise in heat of exhaust gas circulated through the gas passage, and the sealing member is seated on the upper surface of the lower housing and bolt holes are drilled. A first gasket integrally connected to a falling edge portion, a central portion in which a through hole is drilled in the inner center while maintaining a predetermined distance from the edge portion, by a plurality of connecting pieces, and is in close contact with the lower surface of the upper housing A second gasket that is integrally connected with the rim part through which bolt holes are drilled and the central part with a through hole drilled in the inner center while maintaining a predetermined distance from the rim part by a plurality of connecting pieces and is in close contact with the first gasket. It provides an EGR valve for a vehicle, characterized in that it is configured.

The first gasket has inclined surfaces formed on the edge portion and the center portion, respectively, so that protrusions protruding toward the lower housing together with the connecting pieces are provided. It is characterized in that each protrusion protruding toward the housing is provided.

It is characterized in that a plurality of legs are integrally provided around the periphery of the second gasket to determine a position to be assembled while being hung on the flange of the upper housing or in contact with the side of the flange.

A hooking bent portion is formed at the upper end of the legs, and a support piece is provided on the hooking bent portion of the leg to be hooked on the upper surface of the flange of the upper housing.

Assembly protrusions are integrally bent and molded on the rim of the second gasket, and fitting protrusions are provided on the rim of the first gasket to have positions and shapes corresponding to the assembling protrusions to fit into the assembling protrusion and assemble. characterized.

According to the present invention, since the sealing member is divided into a first gasket and a second gasket and each has protrusions in opposite directions, the sealing effect can be improved due to an increase in the compression ratio of the sealing member.

In addition, since excellent airtight effect can be exhibited in the entire area of the sealing member for blocking the gap between the upper and lower housings, it prevents the outflow of cooling water and the penetration of condensed water or foreign substances into the valve to ensure smooth operation of the valve stem. can make it happen.

In addition, it is possible to prevent a defect caused by excessively increasing the temperature of the exhaust gas inside the valve by the cooling water filled in the cooling water.

Therefore, there is an effect of improving the durability and marketability of the EGR valve by improving the airtightness.

1 is a perspective view showing an EGR valve according to the present invention.
2 is an exploded perspective view showing a state in which a sealing member made of a first gasket and a second gasket is installed between the upper housing and the lower housing;
3 is a side cross-sectional view showing a part of the EGR valve.
4 is a rear view of the EGR valve.
5 is a bottom perspective view showing the configuration of the upper housing.
6 is a bottom perspective view showing a state in which the sealing member is mounted to the upper housing.
7 is a plan view of the first gasket.
8 is a plan view of the second gasket;
9 is a partially enlarged front view of the second gasket;
FIG. 10 is an enlarged cross-sectional view of part A of FIG. 3 .
11 is an enlarged cross-sectional view illustrating an exploded portion A of FIG. 3 .
12 is a plan view of the EGR valve according to the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and are common in the art to which the present invention pertains. It is provided to fully inform those with knowledge of the scope of the invention, and the present invention is only defined by the scope of the claims.

In addition, the terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention.

In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, "comprises" and/or "comprising" does not exclude the presence or addition of elements other than those mentioned.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs.

Hereinafter, in order to describe the present invention in more detail, embodiments according to the present invention will be described in more detail with reference to the accompanying drawings.

1 is a perspective view illustrating an external shape of an EGR valve for a vehicle according to the present invention.

2 is a perspective view showing a detailed configuration by disassembling the lower housing 100, the sealing member 300, and the upper housing 200 of the EGR valve for a vehicle according to the present invention, respectively.

3 is a cross-sectional view showing the main part configuration by partially cutting out in the assembled state of the EGR valve for a vehicle according to the present invention.

As shown in these drawings, the EGR valve for a vehicle according to the present invention includes a lower housing 100 provided with a gas flow path 110 to circulate exhaust gas, and is coupled to the upper portion of the lower housing 100 to flow the exhaust gas. It is largely composed of an upper housing 200 in which a valve device for controlling the air-tightness is accommodated, and a sealing member 300 mounted between the lower housing 100 and the upper housing 200 to maintain airtightness.

Flanges 130 and 230 are respectively provided on the upper portion of the lower housing 100 and the lower portion of the upper housing 200 to be coupled through several bolts, and there are bolts in several corners of the flanges 130 and 230 . Holes for fastening with the nut are formed.

The gas flow path 110 provided inside the lower housing 100 is connected to the inlet 111 and the outlet 112, and a part of the exhaust gas is introduced into the gas flow path 110 through pipes (not shown). After being finished, it is discharged to the cylinder, and in this process, the EGR valve is heated by the heat of the exhaust gas.

The movement of the exhaust gas is either a negative pressure type in which exhaust gas of the exhaust manifold is introduced by the negative pressure of the engine or an electronic control type controlled by an electronic control unit (ECU), which is a conventional technique, so a detailed description thereof will be omitted. do.

In order to prevent abnormal overheating of the EGR valve, the cooling water channel 120 is formed at a position deviated from the outside of the gas flow path 110 so that the cooling water is circulated in the lower housing 100 .

The cooling water channel 120 is formed in an approximately 'C' shape to be circulated after being introduced through a cooling hose (not shown), and the circulated cooling water is discharged through the discharge hose.

A valve device for selectively opening and closing the inlet port and a driving motor for causing a reciprocating motion of the valve device are provided inside the upper housing 200 .

The valve device again includes a valve plate 101 that selectively blocks the gas flow path 110, a valve stem 202 connected to the valve plate 101, a roller provided on the upper surface of the valve stem 202, and the rollers are movable. A cam having a cam groove, a shaft and a gear train connected to the cam, a driving motor (not shown) coupled with the gear train, and electronic components are installed.

In addition, a moving passage through which the valve stem 202 moves is provided in the upper housing 200 , and the valve stem 202 passes through the moving passage, and the gas is prevented from being directed in the direction of the actuator through the packings.

In addition, while guiding the vertical movement of the valve stem 202, a bushing-type stem guider 203 for supporting the valve stem 202 is vertically provided.

Accordingly, the valve stem 202 performs an opening and closing operation by the driving motor to add a portion of the exhaust gas to the mixer and serve as an EGR valve for sucking into the cylinder.

The opening of the upper housing 200 accommodating each of these parts is sealed through the cover.

On the other hand, to be exposed on the upper surface of the lower housing 100 of the EGR valve, a cooling water passage 120 through which the cooling water is circulated is formed, and the outflow of the cooling water and the inflow of condensed water and foreign substances between the lower housing 100 and the upper housing 200 are prevented. To prevent this, the sealing member 300 must be installed.

The sealing member of the EGR valve according to the present invention is divided into a first gasket 310 and a second gasket 320 .

The first gasket 310 and the second gasket 320 may be formed of a metal material, a heat-resistant resin, or an elastic material.

2 and 7 show the configuration and shape of the first gasket 310 in a perspective view and a plan view, respectively.

The first gasket 310 is seated on the upper surface of the lower housing 100 and has a structure that connects the edge portion 311 and the central portion 312 with a connecting piece 313 .

The edge portion 311 has bolt holes 314 formed at positions corresponding to the holes drilled in the flange 130 of the lower housing 100 , and the central portion 312 has a predetermined distance from the edge portion 311 . A through hole 315 is formed in the center in the maintained state.

Then, the edge portion 311 and the central portion 312 are integrally connected by a plurality of connecting pieces 313 .

The second gasket 320 installed in an overlapping state with the first gasket 310 is in close contact with the lower surface of the upper housing 200, and a connecting piece 323 is formed between the edge portion 321 and the central portion 322. It is made up of a connecting structure.

The edge part 321 has bolt holes 324 drilled at positions corresponding to the holes drilled in the flange 230 of the upper housing 200, and the central part 322 has a predetermined distance from the edge part 321. A through hole 325 is drilled in the center in a state of being maintained.

Then, the edge portion 321 and the central portion 322 are integrally connected by a plurality of connecting pieces 323 .

On the other hand, in order to further improve the sealing effect, a portion of the first gasket 310 and the second gasket 320 is provided with protrusions 318 and 328 protruding in opposite directions, respectively.

That is, the first gasket 310 is formed with inclined surfaces 316 and 317 on the edge portion 311 and the central portion 312, respectively, so as to protrude toward the lower housing 100 together with the connecting pieces 313 ( 318) is molded (Fig. 11).

In addition, the second gasket 320 is formed with inclined surfaces 326 and 327 on the edge portion 321 and the central portion 322, respectively, so as to protrude toward the upper housing 200 together with the connecting pieces 323 ( 328) is molded.

As described above, the protrusion 318 of the first gasket 310 protrudes toward the lower housing 100 , and the protrusion 328 of the second gasket 320 is symmetrical toward the upper housing 200 in the opposite direction. When the lower housing 100 and the upper housing 200 are fastened facing each other through bolts and nuts in a state in which the two protruding parts 318 and 328 are provided, in particular, both protrusions 318 and 328 are forcibly flat at the position. As it is elastically deformed, the sealing effect can be further improved.

In addition, a plurality of legs 330 are provided to maintain the second gasket 320 and the upper housing 200 coupled to the desired position in the assembly process.

Typically, the first gasket 310 positioned on the upper portion of the lower housing 100 may maintain a seated state without being separated by its own weight.

On the other hand, since the second gasket 320 is located on the lower surface of the upper housing 200 , the second gasket 320 is inevitably separated from the upper housing 100 by its own weight during the assembly process.

Therefore, it is easy to assemble around the second gasket 320 with the legs 330 being pressed on the sides according to the shape of the flange 230 of the upper housing 200 or hung on the upper part of the flange 230 . The assembly position is determined so that it can be made.

In the upper portion of the legs 330, a hooking bending portion 331 is formed to be caught on the upper surface of the flange 230 or elastically contacted to the side to guide the assembly position.

At this time, the leg 330 is bent upward from the edge portion 321 of the second gasket 320 according to the purpose of being hung on the upper part of the flange 230 and the purpose of being in contact with the side. Make it clear that it is made

In addition, it is preferable to further mold the support piece 332 extending from the locking bending portion 331 for use on the upper surface of the flange 230 of the upper housing 200 among the legs 330 .

The support piece 332 is integrally formed with the hooking bent portion 331, and is formed by cutting off a part of the hooking bent portion 331, the end of which is elastically contacted with the upper surface of the flange 230 and the leg In the state in which 330 is hung, the effect of preventing escape is increased.

That is, the hooking bent portion 331 of the leg 330 is slightly hooked on the upper edge of the flange 230 , and the support piece 332 is inclined from the inside thereof on the inner flat surface of the edge of the flange 230 . The second gasket 320 can be maintained in a state of being attached to the upper housing 200 stably in contact.

In addition, in the space of the edge portion 321 of the second gasket 320, the assembly protrusions 329 are integrally formed by bending toward the upper portion in a substantially trapezoidal shape. (See FIG. 9)

In addition, fitting protrusions 319 are bent and molded to have positions and shapes corresponding to the assembly protrusions 329 on the edge 311 of the first gasket 310 .

Therefore, when the first gasket 310 and the second gasket 320 are brought into close contact with each other by the assembling process, the fitting protrusion 319 is inserted into the assembling protrusion 329 and assembled at the correct position without shifting from each other. We will guide you through the process.

The fitting protrusion 319 and the assembly protrusion 329 are provided at a plurality of places (eg, 3 places) on the rim 311 of the first gasket 310 and the rim 321 of the second gasket 320 . It is preferable in terms of improving assembly properties.

In addition, the installation position of the fitting protrusion 319 and the assembly protrusion 329 is located in the outer space of the EGR valve so that the lower housing 100 and the upper housing 200 are not deformed under pressure in a state in which the lower housing 100 and the upper housing 200 are fastened by bolts. It is designed to be so (refer to Fig. 12).

5 is a bottom perspective view showing a configuration in which the inner pressing protrusion 240 and the outer pressing protrusion 250 are respectively provided on the upper housing 200 .

That is, as shown in FIGS. 5 and 11 , on the bottom surface of the upper housing 200 , two outer pressing protrusions 250 and an inner pressing protrusion 240 maintain a distance while forming concentric circles in a thin annular shape. Each is extruded.

The outer pressing protrusion 250 and the inner pressing protrusion 240 further protrude by the protruding thickness T with respect to the bottom surface of the upper housing 200 .

The outer pressing protrusion 250 protrudes in a circular shape with an area and a position capable of pressing a portion of the inclined surface 326 , the protrusion 328 , and the edge portion 321 provided to the outside of the second gasket 320 . .

Further, the inner pressing protrusion 240 is formed smaller than the diameter of the outer pressing protrusion 250 , and is formed inside the outer pressing protrusion 250 .

The inner pressing protrusion 240 protrudes in a circular shape with an area and a position capable of pressing the inclined surface 327 provided inside the second gasket 320 , a portion of the inner protrusion 328 , and a portion of the central portion 322 .

Therefore, when the sealing member 300 is positioned between the lower housing 100 and the upper housing 200 and fastened through a bolt and a nut, both sides of the protrusion 328 are formed by turning the inner pressing protrusion 240 and the outer pressing protrusion. By further pressing through 250, it is possible to further improve the overall sealing effect.

Here, it is revealed that the protrusion thickness T of the inner pressing protrusion 240 and the outer pressing protrusion 250 is suitable to be manufactured to be about 1/2 the thickness of the second gasket 320 .

Accordingly, the compression ratio of the second gasket 320 and the first gasket 310 is improved by the inner pressing protrusion 240 and the outer pressing protrusion 250 , and thus excellent airtightness in the entire area of the sealing member 300 . that can be effective.

6 is a bottom perspective view illustrating a state in which the sealing member 300 including the first gasket 310 and the second gasket 320 is mounted on the upper housing 200 .

7 shows the configuration of the first gasket 310 in a plan view.

8 is a plan view showing the configuration of the second gasket 320, in which both the first gasket 310 and the second gasket 320 are approximately the flange 130 of the lower housing 100 and the upper housing 100. 230), it can be seen that the shape is molded into a shape corresponding to the shape.

9 is a partially enlarged front view of the leg 330 of the second gasket 320, showing that the legs 330 are formed to have different heights depending on the purpose.

FIG. 10 is an enlarged cross-sectional view of part A of FIG. 3 showing a configuration in which both ends of the protrusion 328 of the second gasket 320 are further pressed by the inner pressing protrusion 240 and the outer pressing protrusion 250 .

11 shows a configuration in which the lower housing 100 is positioned below the first gasket 310 and the upper housing 200 is positioned above the second gasket 320 and is pressurized.

12 is a plan view of an assembled state of the EGR valve.

On the other hand, the lower housing 100 has a sealing member 300 interposed between the upper housing 200. When the bolt is penetrated through the bolt hole and is strongly fastened through the nut, especially in the upper housing 200, between the bolt fastening areas As the strength weakens at the position of the flange 230, deformation may occur.

That is, when the bolts are tightened in the bolt fastening areas spaced apart from each other, the flange portion between the bolt fastening areas is slightly bent upwards relatively, and is lifted.

As such, when a deformation causing lifting occurs in the flange 230 of the upper housing 200, the pressing force of the sealing member 300 is not constant and the airtightness cannot be completely maintained in the weakened part, so that foreign substances including coolant leakage or condensate may be imported.

Therefore, the flange 230 of the upper housing 200 is integrally formed with the reinforcing meat 231 to protrude and prevent the flange portion between the bolt fastening areas from being bent, thereby preventing lifting and continuously maintaining the airtight effect. It is necessary to implement

This reinforcing meat 231 is integrally formed with the flange 230 in the process of forming the lower housing 100 by a method such as die-casting, and has a thickness as thick as possible. is molded to protrude.

In particular, as shown in FIGS. 1 and 12, two reinforcing ribs 231 are integrally protruded from the upper housing 200 side by side while maintaining a distance, and a connecting rib 232 is connected therebetween. It is to be molded in a ladder shape to maintain sufficient strength against deformation, but to maximize the contact area with external air so that it can have an air cooling effect.

The present invention can exhibit an excellent airtight effect in the entire area of the sealing member, and prevents defects caused by excessive temperature rise of the exhaust gas inside the valve by the cooling water circulated in the cooling water.

In addition, the leakage of cooling water or penetration of condensed water or foreign substances into the valve is prevented, respectively, so that the operation of the valve stem is performed smoothly, and the durability of the product can be significantly improved.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but this is only for explaining the invention, and various modifications or equivalents from the detailed description of the invention to those of ordinary skill in the art to which the present invention pertains It will be appreciated that one embodiment is possible.

Therefore, the true scope of the present invention should be determined by the technical spirit of the claims.

100 - lower housing 110 - gas flow path
120 - coolant water 130 - flange
200 - upper housing 230 - flange
240 - inner pressing projection 250 - outer pressing projection
300 - sealing member 310 - first gasket
311 - edge portion 312 - center portion
313 - connecting piece 318 - protrusion
320 - 2nd gasket 321 - Edge part
322 - central part 323 - connecting piece
328 - overhang 330 - leg

Claims (10)

In the sealing member of a vehicle valve,
The sealing member is seated on the upper surface of the lower housing to form an rim portion in which bolt holes are formed, and a central portion in which a through hole is formed in the inner center while maintaining a predetermined distance from the rim portion as an integral part of a plurality of connecting pieces. a first gasket connected thereto;
The rim part in close contact with the lower surface of the upper housing and in which bolt holes are drilled, and the central part in which a through hole is drilled in the inner center while maintaining a predetermined distance from the rim part, are integrally connected with a plurality of connecting pieces, and the first It includes a second gasket in close contact with the gasket,
The first gasket has an edge portion and a central portion formed with inclined surfaces, respectively, so that the connecting pieces and the
A protrusion protruding toward the lower housing is provided together,
The sealing member of the vehicle valve, characterized in that the second gasket is provided with each of the protrusions protruding toward the upper housing together with the connecting pieces by forming inclined surfaces on the edge portion and the central portion, respectively. delete The method of claim 1,
A sealing member for a vehicle valve, characterized in that, around the second gasket, a plurality of legs for determining a position to be assembled while being hung on the upper surface of the flange of the upper housing or being in contact with the side of the flange are integrally provided. 4. The method of claim 3,
At the upper end of the legs, a hooking bend is formed,
A sealing member of a vehicle valve, characterized in that a support piece is provided at the hooking bent portion of the legs to be hooked on the upper surface of the flange of the upper housing. The method of claim 1,
Assembly protrusions are integrally bent and molded on the edge of the second gasket,
A sealing member for a vehicle valve, characterized in that the rim portion of the first gasket is provided with fitting protrusions in positions and shapes corresponding to the assembling protrusions and fitted into the assembling protrusions. A lower housing in which a gas flow path is provided for sending a part of the exhaust gas to the cylinder after introducing a part of the exhaust gas through the pipe;
It is installed on the upper part of the lower housing and includes a valve stem connected to the valve plate to selectively block the exhaust gas passage, and a drive motor coupled to a gear train for driving the valve stem, and a stem guider supporting the valve stem is provided. The upper housing provided, and
In the configuration including a sealing member installed between the lower housing and the upper housing,
A cooling water channel is provided in the lower housing to cool the excessive increase in the heat of the exhaust gas circulated through the gas flow path,
The sealing member is seated on the upper surface of the lower housing and has a rim portion in which bolt holes are drilled, and a central portion in which a through hole is drilled in the inner center while maintaining a predetermined distance from the rim portion as an integral part of a plurality of connecting pieces. a first gasket connected thereto;
A plurality of connecting pieces are integrally connected to the rim part in close contact with the lower surface of the upper housing and in which bolt holes are drilled, and the central part in which a through hole is drilled in the inner center while maintaining a predetermined distance from the rim part. Includes a second gasket in close contact with the first gasket,
The first gasket is provided with a protrusion protruding toward the lower housing together with the connecting pieces by forming inclined surfaces on the edge portion and the center portion, respectively;
The EGR valve for a vehicle, characterized in that the second gasket is provided with each of the protrusions protruding toward the upper housing together with the connecting pieces by forming inclined surfaces on the edge portion and the center portion, respectively. delete 7. The method of claim 6,
The EGR valve for a vehicle, characterized in that a plurality of legs are integrally provided around the second gasket to determine a position to be assembled while being hung on the flange of the upper housing or in contact with the side of the flange. 9. The method of claim 8,
At the upper end of the legs, a hooking bend is formed,
The EGR valve for a vehicle, characterized in that the supporting piece is provided on the hooking bent portion of the legs to be hooked on the upper surface of the flange of the upper housing. 7. The method of claim 6,
Assembly protrusions are integrally bent and molded on the edge of the second gasket,
The EGR valve for a vehicle, characterized in that the rim portion of the first gasket is provided with fitting protrusions in positions and shapes corresponding to the assembling protrusions and fitted into the assembling protrusions to be assembled.

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