KR101237940B1 - Exhaust Gas Recirculation Cooler for Vehicle - Google Patents

Abstract

The present invention relates to a vehicle easyr cooler for improving the heat exchange efficiency by changing the flow of the exhaust gas flowing through the inside of the easyr cooler.

Description

Easy Gas Recirculation Cooler for Vehicle

The present invention relates to a vehicle easy-to-cooler for cooling the exhaust gas combusted in the engine by cooling water to be supplied to the engine for reuse.

In general, an EGR cooler (Exhaust Gas Recirculation Cooler) is a device that suppresses the generation of nitrogen oxides (NOx) by reducing the combustion temperature in the cylinder by recycling the exhaust gas of the vehicle exhaust gas into the intake cylinder.

That is, as a means for reducing the nitrogen oxides (NOx) in the exhaust gas is provided to return a portion of the exhaust gas to the intake cylinder to lower the maximum temperature and reduce the amount of nitrogen oxides (NOx) generated when the mixer burns.

SUMMARY OF THE INVENTION An object of the present invention is to provide an easy-to-use easy cooler for a vehicle that enables an effective connection installation between heat dissipation units disposed inside the easy cooler.

An object of the present invention is to provide a vehicle easy cooler for which the heat exchange capacity of the easy cooler can be adjusted according to the displacement of the vehicle.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle easy cooler with improved heat exchange performance with cooling water, with smooth movement of exhaust gas.

In order to achieve the above object, an easy-to-use EG cooler for a vehicle according to the present invention comprises an EG cooler housing having an inlet and an outlet through which coolant flows; And it may include a heat dissipation unit having a flange, so that a plurality of alternately arranged inside the easy cooler housing.

The heat dissipation unit may be alternately arranged in a 180 degree period along the longitudinal direction of the RG cooler housing.

The flanges may be arranged to extend each different length.

The flanges include first and second flanges extending outwardly of the front surface of the body, respectively; It may further include third and fourth flanges disposed to extend outside the rear surface of the body.

The first and fourth flanges and the second and third flanges may have the same length and extend.

The first and second flanges and the third and fourth flanges may have different lengths and may be extended.

Any one of the first and fourth flanges or the second and third flanges may be spaced apart from the inner side of the EG cooler housing.

The heat dissipation unit is a heat exchange of the exhaust gas and the cooling water is made, the heat dissipation fin is disposed inside; Opening from the upper surface of the body to the lower surface, and may further include an opening hole through which the coolant flows.

The flange may be bent outwardly to the front and rear of the body, respectively.

The heat dissipation unit may be disposed spaced apart from the inner side of the easy cooler housing.

The interval is characterized in that the passage through which the cooling water is moved to the opening hole of the neighboring heat dissipation unit via the opening hole.

The heat dissipation unit may further include a mixing section for promoting the mixing of the exhaust gas.

The heat dissipation fins may be arranged on the same line for each heat dissipation unit.

The heat dissipation fins may be arranged on different lines for each heat dissipation unit.

The heat dissipation unit may be manufactured by a die casting method.

According to another exemplary embodiment of an easy cooler according to the present invention, a configuration of an easy cooler housing having an inlet and an outlet through which coolant flows; And a heat dissipation unit having a flange such that a plurality of the RG cooler housings are alternately disposed in the IR cooler housing, wherein the heat dissipation unit further includes a mixing section for facilitating mixing of exhaust gases therein.

As described above, the vehicle easy cooler according to the present invention according to the present invention has the effect of improving the heat exchange efficiency of the easy cooler.

Vehicle easy cooler according to the present invention according to the present invention has the effect of making the connection between the heat dissipation unit and the flow of the cooling water stable.

1 is a perspective view showing a vehicle easy cooler according to the present invention.
Figure 2 is a longitudinal cross-sectional view of the heat dissipation unit disposed inside the vehicle easy cooler according to the present invention.
Figure 3 is a perspective view showing a heat dissipation unit provided in a vehicle G-G cooler according to the present invention.
Figure 4 is a front view of the heat dissipation unit shown in FIG.
5 is a cross-sectional view taken along line BB shown in FIG. 4.
Figure 6 is a view schematically showing a coupling state of the heat dissipation unit according to the present invention.
Figure 7 is a perspective view showing a combined state of the heat dissipation unit according to the present invention.
8 to 9 is an operating state diagram of a vehicle easy-to-use cooler according to the present invention.
10 is a graph showing a state in which the vehicle easy cooler according to the present invention and the conventional easy cooler and the target easy cooler are compared and tested.

Hereinafter, with reference to the drawings will be described an embodiment of a vehicular easy cooler according to the present invention with reference to FIG.

The EG cooler 1 may be provided on one surface of the EG cooler housing 100 having a rectangular shape such that the inlet 110 and the outlet 120 communicate with the inside. In addition, the inlet 110 and the outlet 120 may be spaced apart from each other.

In the EZC cooler housing 100, a heat dissipation unit 200 having a plurality of heat dissipation fins 202 through which exhaust gas passes may be alternately disposed.

The heat dissipation unit according to the present invention will be described with reference to FIG.

The plurality of heat dissipation units 200 may be arranged in close contact with the inside of the easy cooler housing 100.

It is preferable that one heat dissipation unit 200 is not installed alone, and each heat dissipation unit 200 is connected and installed.

The mixing section provided in the heat dissipation unit of the present invention will be described with reference to the drawings.

The mixing section 220 is preferably spaced apart at equal intervals along the longitudinal direction of the EG cooler housing 100.

This is because the hot exhaust gas is mixed in the mixing section 220 by the diffusion phenomenon, and a vortex phenomenon occurs, thereby delaying the movement of the exhaust gas for a specific time, thereby improving heat exchange efficiency in the heat dissipation unit 200. For that.

In addition, the mixing section 220 is to prevent the source of the problem that the heat exchange is unstable in a specific region while the re-mixing after the exhaust gas via the heat radiating fin 202.

The mixing section 220 may be spaced apart at equal intervals along the longitudinal direction of the RG cooler housing 100. When having the same interval, the heat exchange performance in each heat dissipation unit can be maintained uniformly and stably.

The mixing section 220 is preferably disposed at a position spaced inward from the front, rear surface of the heat dissipation unit 200.

This is because the mixing and diffusion is made after passing through the heat radiating unit 200, and it is preferable that the mixing and diffusion are repeatedly performed after the heat exchange is carried out to the heat radiating unit again.

In addition, the mixing section 220 may prevent the pressure drop of the exhaust gas.

The pressure when the exhaust gas flows in through the front surface of the easy cooler housing 100 and the pressure when the exhaust gas flows out through the rear surface have different pressures.

This is because, while the exhaust gas passes through the plurality of heat radiation fins 202 disposed in the heat dissipation unit 200, resistance to the exhaust gas flow is generated by the heat dissipation fins 202. This is because a drop occurs.

The mixing section 220 may be formed in a rectangular shape having a predetermined area so as to minimize the occurrence of such a pressure drop.

In addition, since the heat dissipation fin 202 is not disposed in the mixing section 220, resistance of the exhaust gas by the heat dissipation fin 202 does not occur.

Therefore, it is possible to minimize the pressure drop that may be generated while the exhaust gas is moved along the longitudinal direction of the EG cooler housing 100.

The heat dissipation unit 200 may be manufactured by an aluminum die casting method. When the heat dissipation unit 200 is made of aluminum, the heat transfer efficiency can be remarkably improved, and the manufacturability is also easy.

With reference to Figures 3 to 4 attached to the heat radiation fin provided in the heat dissipation unit of the present invention.

The heat dissipation fins 202 may be arranged on the same line for each heat dissipation unit, or may be disposed on different lines.

When the heat dissipation fins 202 are arranged on the same line, an IR cooler is mainly installed in a medium or small vehicle, and when the heat dissipation fins 202 are disposed on different lines, an IR cooler is mounted on a large vehicle. If it is installed.

When the heat dissipation fins 202 are arranged on different lines, a movement resistance is generated when the exhaust gas is moved. However, since the heat dissipation fins 202 are generated within a range that does not impair the heat exchange performance of the EG cooler, It does not cause any effect on the operation.

In the case of a large vehicle, a large amount of exhaust gas is generated, and the exhaust gas must be quickly moved to the heat dissipation unit 200, so that the heat dissipation fins are alternately arranged as above.

Detailed description of the coupling state of the heat dissipation unit 200 will be described later.

The heat dissipation unit 200 may exchange heat between the exhaust gas and the coolant, and a body 201 having a heat dissipation fin 202 disposed therein.

The body 201 is configured to have a rectangular shape, and the heat dissipation fins 202 may be disposed therein with the front and rear surfaces thereof being opened.

The body 201 may further include a flange 210 extending outwardly on the front and rear surfaces, respectively.

The flanges 210 may be arranged to extend to different lengths to the outside of the body 201.

The flange 210 is not particularly limited with respect to the extension length, but preferably has a length shown in the drawing in consideration of the size of the EG cooler housing 100.

The flanges 210 may include first and second flanges 211 and 212 extending upwardly and downwardly in front of the body 201 and third and fourth flanges respectively extending upwardly and downwardly in the rear of the body 201. 213 and 214 may be further included.

The first and fourth flanges 211 and 214 and the second and third flanges 212 and 213 may have the same length and may be extended.

The first and fourth flanges 211 and 214 and the second and third flanges 212 and 213 may be disposed to face each other in a diagonal direction. This is because, when installed in the easy cooler housing 100, the installation and the flow of the coolant are simultaneously planned. A detailed description thereof will be given later.

The first and second flanges 211 and 212 and the third and fourth flanges 213 and 214 may have different lengths and may be extended.

Because the coolant is introduced through the inlet 110 to exchange heat with the heat dissipation unit 200 located at the front end of the plurality of IG cooler housings 100, and to perform heat exchange with other heat dissipation units sequentially. It is preferable to move while sequentially passing through the heat dissipation unit 200 disposed inside the Al cooler housing (100).

The heat dissipation unit 200 may further include a coolant hole 220 that is opened from the top to the bottom.

The coolant hole 220 preferably has a separate flow path from the top of the body 201 to the bottom so as not to affect the flow of the exhaust gas flowing into the body 201.

That is, after the exhaust gas is introduced through the front of the body 201, the exhaust gas is moved to the rear surface, and the coolant is separated from the space in which the exhaust gas is moved from the upper surface of the body 201 to the lower surface of the cooling water hole 230. It may be made to be movable to the area.

A front view of the heat dissipation unit according to the present invention will be described with reference to FIG. 4.

When the heat dissipation unit 200 is viewed from the front, a plurality of heat dissipation fins 202 may be divided in the vertical direction. In addition, each of the heat dissipation fins 202 may further include a partition 204 partitioning each of the heat dissipation fins 202 serving as a passage for cooling water.

The partition wall 204 is provided with a cooling water hole 230 therein, the cooling water can be moved.

The heat dissipation unit according to the present invention will be described with reference to FIG. 5, which is taken along line B-B of FIG.

The heat dissipation unit 200 may be spaced apart while maintaining a plurality of heat dissipation fins 202 at the same interval in the up and down directions. In addition, the heat dissipation fin is made integral with the heat dissipation unit 200.

The heat radiation fin of the present invention will be described with reference to FIGS. 4 to 5.

The heat dissipation fins 202 may be arranged in a matrix in a horizontal direction and a vertical direction with respect to the front surface of the heat dissipation unit 200.

The reason for this arrangement is to enable the exhaust gas to move more smoothly via the heat dissipation fin 202.

The heat dissipation fins 202 may be disposed on the front longitudinal direction of the body 201 while maintaining a predetermined length and spacing. In the present exemplary embodiment, n columns may be disposed in the horizontal direction and n columns in the vertical direction.

A passage for flowing exhaust gas may be disposed between the heat dissipation fin and the heat dissipation fin.

The heat dissipation fins 202 may be disposed to have a horizontal length of 10 mm and extend, and a vertical length of 1 mm.

The heat dissipation fins 202 may further include inclined portions inclined upward and downward, respectively, based on the front surface of the body 201.

The inclined portion may be disposed to be inclined outwardly in order to reduce the speed at which the hot exhaust gas and the coolant are not heat-exchanged sufficiently and move along the heat radiating fin when the exhaust gas is momentarily moved through the passage.

The inclined portion 202a preferably has an inclination angle α of 5 degrees or less.

Because, when the inclination angle is 5 ° or more, the flow resistance of the exhaust gas may be increased and the unstable exhaust gas may be moved. If the angle is less than 5 °, the heat exchange efficiency of the heat dissipation unit 200 may decrease while the exhaust gas flows rapidly. Because it can.

The assembled state of the heat dissipation unit according to the present invention will be described with reference to FIG.

In the heat dissipation unit 200, the N1 th heat dissipation unit 200 is disposed on the basis of the direction shown in the drawing, and the N2 th heat dissipation unit 200 has a flat surface such that the upper surface of the N 1 th heat dissipation unit 200 is positioned downward. Preferably rotated 180 degrees relative to the reference.

The reason for arranging the heat dissipation unit 200 as described above is to improve the heat exchange performance between the high temperature exhaust gas and the coolant, and to facilitate the smooth movement of the coolant in the inside of the EG cooler housing 100.

The heat dissipation unit assembled as described above will be described with reference to FIG. 7.

As described above, each of the plurality of heat dissipation units 200 may be welded to each other while the first heat dissipation unit N1 and the second heat dissipation unit N2 are alternately arranged.

Even when the heat dissipation unit 200 is disposed as described above, the cooling water holes 230 may all be arranged on the same line.

The operation state of the vehicle easy cooler according to the present invention configured as described above will be described with reference to FIG. 8.

For reference, FIG. 8 is provided in a form in which the heat dissipation fins are not disposed on the same line along the longitudinal direction of the EZC cooler housing.

After the coolant is introduced through the inlet 110, the coolant is moved from the upper part to the lower part through the coolant hole 230 of the heat dissipation unit 200, as shown in the direction of the dark solid line. Through the gap with the bottom surface is introduced into the cooling water hole 230 in the lower portion of the heat radiating unit 200 adjacent.

Then, it can be continuously moved from the lower portion of the heat dissipation unit 200 through the cooling water hole 230 to the upper portion.

Therefore, the cooling water may be continuously moved to the outlet 110 via the upper and lower portions of the heat dissipation unit.

The exhaust gas may be moved with a moving path separate from the movement of the coolant, as shown by the thin solid arrow.

The exhaust gas is moved along the upper and lower surfaces of the heat dissipation fin 202 to conduct high temperature exhaust gas heat to the heat dissipation fin 202.

The heat dissipation fin 202 is heat conduction is made to the entire body 202 integrally, the cooling water described above is moved through the coolant hole 220, the exhaust gas is cooled by heat exchange.

The exhaust gas is moved while performing heat exchange with the heat dissipation fin of the first heat dissipation unit 200, and reaches the mixing section 220.

The exhaust gas is significantly lowered in the flow rate of the exhaust gas by diffusion and turbulence generation in the mixing section 220, the mixing (Mixing) is moved to another heat radiation fin 202 disposed in front for a predetermined time It may be delayed.

The heat exchange efficiency of the heat dissipation unit 200 may be improved while the movement of the exhaust gas is intentionally stagnated in the mixing section during the time when the movement of the exhaust gas is delayed.

The exhaust gas is moved in the direction of movement of the exhaust gas in the mixing section 220 by the supply pressure of the continuous exhaust gas supplied to the EG cooler housing 100, and the heat exchange unit 200 may be continuously heat exchanged.

The exhaust gas is moved in the direction of movement of the exhaust gas in the mixing section 220 by the continuous supply pressure of the exhaust gas supplied to the EZC cooler housing 100, but the heat radiation fins 202 are alternately arranged so that the exhaust gas flows. This can be heat exchanged with the heat radiating fin 202 while being made as slow as possible.

Therefore, the exhaust gas and the coolant can perform heat exchange while maintaining a sufficient time due to heat exchange in the heat dissipation unit 200.

The heat dissipation fins are arranged along the same direction along the longitudinal direction of the EZC cooler housing.

After the coolant is introduced through the inlet 110, the coolant may be moved from the upper part of the heat dissipation unit 200 to the lower part of the heat dissipation unit 200 as shown in the direction of the dark solid line and moved upward from the lower part of the neighboring heat dissipation unit 200.

The cooling water may be continuously moved to the outlet 110 via the upper and lower portions of the heat dissipation unit.

Exhaust gas is moved along the upper and lower surfaces of the heat dissipation fins 202, as shown by the thin solid arrows, and conducts high temperature exhaust gas heat to the heat dissipation fins 202.

The heat dissipation fin 202 is heat conduction is made to the entire body 202 formed integrally, while the coolant described above is moved through the coolant hole 220, the cooling is made by heat exchange with the exhaust gas.

The exhaust gas is moved while performing heat exchange with the heat radiating fins of the first heat dissipation unit 200, and the flow rate of the exhaust gas is significantly reduced by diffusion and turbulent flow reaching the mixing section 220, and mixing (Mixing) This may be delayed movement to the heat radiation fins 202 disposed in front of the predetermined time.

While the exhaust gas is intentionally stagnant in the movement of the exhaust gas in the mixing section 220 during the time that the movement is delayed, the heat exchange efficiency in the heat dissipation unit 200 may be improved.

The results of comparing the respective performances of the vehicle easy cooler according to the present invention, the conventional easy cooler and the target cooler as targets will be described with reference to FIG. 10.

For reference, the X axis is time, the left X axis is efficiency, and the right X axis is the pressure drop.

In addition, the conventional EZR cooler was experimented in a state in which a predetermined diameter of three circular pipes were arranged in a horizontal and vertical direction, each of which had a predetermined diameter inside the EZR cooler housing, and the target EZR cooler had the structure of the present invention. Although similar to the structure of the heat dissipation fins are not integrally formed with the heat dissipation unit, the heat dissipation fins were bent a number of times, and the experiment was performed in a state in which the heat dissipation unit was separately installed.

The test conditions were divided into light deposits and heavy deposits. The difference between the Light Deposit and the Heavy Deposit is the difference in the amount of soot contained in the exhaust gas.

That is, the light deposit was supplied with 0.1 g / min of soot to an EG cooler, and the heavy deposit was tested under conditions of 0.7 g / min of soot to an EG cooler.

In addition, the inlet temperature of the EZC cooler is 306 ° C, the EGR gas flow rate is 80kg / h, the coolant temperature supplied to the inlet is 80 ° C, and the flow rate of the coolant is 25l / min.

When the experiment was carried out under the above conditions, it can be seen that the present invention maintains relatively good efficiency compared to the efficiency of the EZR cooler targeted in the Light Deposit section.

In addition, it can be seen that the Heavy Deposit section maintains a slight difference, although it is slightly below the efficiency of the target EZR cooler. In addition, it can be seen that there is a significant difference compared to the efficiency of the conventional EZC cooler.

With reference to the graph, the pressure drop inside the EZR cooler will be described.

In the present invention, it can be seen that the pressure drop is kept constant in the light deposit section, and is kept constant while maintaining a slight difference from the target EZC cooler.

In addition, in the Heavy Deposit section, although it is slightly increased over time, it can be seen that the pressure drop is relatively generated as compared with the conventional EZR cooler.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the scope of the appended claims. It will be understood by those skilled in the art that various modifications may be made and equivalents may be resorted to without departing from the scope of the appended claims.

1: Easy cooler 100: Easy cooler housing
110, 120: inlet, outlet 200: heat dissipation unit
201: body 210: flange
211, 212: 1st, 2nd flange 213, 214: 3rd, 4th flange
220: mixing section

Claims (16)

An EG cooler housing having an inlet and an outlet through which coolant flows;
A plurality of heat dissipation units disposed adjacent to each other along the longitudinal direction of the EG cooler housing and provided with heat dissipation fins in the EG cooler housing;
A mixing section provided inside the EZC cooler housing and provided in a space formed between the heat dissipation units to mix and diffuse the exhaust gases moving from a specific heat dissipation unit to a neighboring heat dissipation unit, and to change the moving speed thereof. Including
Each of the heat dissipation unit;
A body spaced apart from an inner surface of the EZC cooler housing, the front and rear openings of which form an exterior, and having heat dissipation fins formed therein;
A cooling water hole provided to be opened in the vertical direction in the body and in which cooling water flows;
It includes a plurality of flanges extending outwardly from the rim of the body,
Some of the plurality of flanges are in contact with the inner surface of the easy cooler housing, the other part of the flange is spaced apart from the inner surface of the easy cooler housing,
The coolant flow path inside the EZC cooler housing may be implemented by a space between the coolant hole, an inner surface of the EZC cooler housing and an outer surface of the body, and a space spaced between a portion of the flange and an inner surface of the EZC cooler housing. Easy cooler characterized in that. The method of claim 1,
The outer shapes of the plurality of heat dissipation units are formed to be the same as each other,
Arrangement direction of the heat dissipation unit disposed in the EZR cooler housing
Vehicle easy cooler characterized in that the adjacent to each other in the opposite direction alternately along the longitudinal direction of the easy cooler housing. delete The method of claim 2,
The flange
First and second flanges extending in one direction outward of the body, respectively;
Further comprising a third, fourth flanges arranged to extend each other outward of the body,
The first and second flanges of specific heat dissipation units among the plurality of heat dissipation units adjacent to each other are provided to contact the first and second flanges of the adjacent heat dissipation unit,
The third and fourth flanges of the specific heat dissipation unit is a vehicle easy cooler, characterized in that provided in contact with the third, fourth flanges of the adjacent heat dissipation unit. delete delete 5. The method of claim 4,
Any one of the first, fourth flange or the second, third flange is a vehicle easy cooler, characterized in that spaced apart from the inside of the easy cooler housing.
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