CN206386201U - EGR channel - Google Patents
EGR channel Download PDFInfo
- Publication number
- CN206386201U CN206386201U CN201621064948.4U CN201621064948U CN206386201U CN 206386201 U CN206386201 U CN 206386201U CN 201621064948 U CN201621064948 U CN 201621064948U CN 206386201 U CN206386201 U CN 206386201U
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- CN
- China
- Prior art keywords
- exhaust gas
- side wall
- flow line
- return flow
- fin
- Prior art date
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- 238000001816 cooling Methods 0.000 claims abstract description 18
- 239000003507 refrigerant Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 44
- 239000007789 gas Substances 0.000 description 64
- 239000000498 cooling water Substances 0.000 description 16
- 238000002485 combustion reaction Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The utility model provides a kind of EGR channel.The EGR channel is used to make a part for exhaust gas be back to inlet channel from exhaust passage, with the exhaust gas return flow line for being arranged on cooling duct vicinity, in the internal perisporium of the exhaust gas return flow line, it is opposite and to the 1st side wall and the 2nd side wall internal face on be respectively formed with the 1st side fin and the 2nd side fin of regulation extension elongation stretched out to the inside of the exhaust gas return flow line, exhaust gas return flow line is configured to, 1st side wall than the 2nd side wall closer to cooling duct refrigerant discharge side, the regulation extension elongation of 1st side fin is more than the regulation extension elongation of the 2nd side fin.Based on the structure, reasonably the heat of exhaust gas can be efficiently absorbed and discharged using refrigerant.
Description
Technical field
The utility model is related to a kind of EGR channel.
Background technology
Generally, on on-board engine etc., it is provided with a part for the exhaust for making to flow in automobile exhaust passage
It is back to EGR (Exhau st Gas Recirculation, the waste gas recycling) system recycled in inlet channel.Should
Egr system has the EGR channel for being used for that the part exhaust in exhaust passage to be imported into inlet channel.
Because the exhaust gas temperature from exhaust passage is higher, it is necessary to imported into inlet channel after being cooled to again.For
This, EGR channel is for example configured as passing through out of cylinder head water jacket, to absorb EGR using the cooling water circulated in water jacket
The heat of the exhaust gas flowed through in passage.
In addition, the cooling effect in order to improve the exhaust gas flowed through in EGR channel, the inside of some EGR channels is provided with
Fin.For example, as shown in figure 4, on the internal face of the exhaust gas passage 210 of EGR channel 200 of the configuration in water jacket 300,
It is provided with multiple fin 220 stretched out to channel interior.By these fin 220, exhaust gas passage 210 is divided into
The multiple divider passages 230 extended along the circulating direction of exhaust gas.Thus, the exhaust gas flowed through in divider passages 230
Body can be while contact while downstream side is moved from the upstream side of divider passages 230 with fin 220.Therefore, by making row
Gas gas is contacted with fin 220, can expand heat transfer area, so as to improve cooling effect.
The exhaust gas passage 210 of EGR channel 200 shown in Fig. 4 is arranged to, and passes through from the inside of water jacket 300.So
And, the exhaust gas passage for yet using EGR channel in recent years is arranged on inside water jacket, but is arranged on water jacket vicinity
Structure.In addition, also there is the structure for the cooling duct vicinity being arranged on the exhaust gas passage of EGR channel outside cylinder head.It is right
For these structures, if prior art as shown in Figure 4 is like that, make the inwall in the exhaust gas passage 210 of EGR channel 200
The equal length for the fin 220 that the upper side and lower side in face is formed respectively, then reasonably can not be led to exhaust gas using refrigerant
The heat of the exhaust gas flowed through in road 210 is efficiently absorbed and discharged.
Utility model content
For above-mentioned technical problem, the purpose of this utility model is reasonably to arrange using refrigerant there is provided one kind
The EGR channel that the heat of gas gas is efficiently absorbed and discharged.
As the technical scheme for solving above-mentioned technical problem, the utility model provides a kind of EGR channel.The EGR channel is used
Inlet channel is back in making the part of exhaust gas from exhaust passage, with the exhaust gas for being arranged on cooling duct vicinity
In return flow line, the internal perisporium of the exhaust gas return flow line, it is opposite and to the 1st side wall and the 2nd side wall internal face on point
Do not formed inside the oriented exhaust gas return flow line and stretch out the 1st side fin and the 2nd side fin of regulation extension elongation, its
It is characterised by：The exhaust gas return flow line is configured to, and the 1st side wall is than the 2nd side wall closer to the cooling
The refrigerant discharge side of passage, the regulation extension elongation of the 1st side fin is more than the rule of the 2nd side fin
Determine extension elongation.
Using above-mentioned EGR channel of the present utility model, due in exhaust gas return flow line, the refrigerant close to cooling duct
The 1st side fin that 1st side wall of discharge side is provided with is longer to the extension elongation stretched out inside exhaust gas return flow line, institute
So that the heat exchange area between exhaust gas and the 1st side fin is larger, can be by the 1st side fin by more heat
Amount passes to the refrigerant for flowing to refrigerant discharge side, and the heat absorbed then is discharged into cooling from refrigerant discharge side by the refrigerant
The outside of passage.So, refrigerant can not only efficiently absorb the heat of exhaust gas, and will promptly can also be absorbed
Heat is discharged to the outside, it is thus possible to suppress cooling duct overall temperature rise.
In addition, in above-mentioned EGR channel of the present utility model, preferably, the cooling duct is the water jacket of cylinder head, institute
State exhaust gas return flow line to be configured near the water jacket, the 1st side wall is than the 2nd side wall closer to the water
The regulation extension elongation of the 1st side fin formed on the side being connected with heat exchanger of set, the 1st side wall
More than the regulation extension elongation of the 2nd side fin formed on the 2nd side wall.Based on the structure, water is being used
In the case of cooled internal combustion engine, due to what is formed on the 1st side wall close to the side being connected with the heat exchanger configuration of water jacket
1st side fin is longer to the extension elongation stretched out inside exhaust gas return flow line, so, exhaust gas dissipates with the 1st side
Heat exchange area between backing is larger, can by the 1st side fin by more heat transfer to being flowed to heat exchanger
Cooling water, and the heat absorbed is rapidly vented to by the cooling water outside (heat exchanger) of water jacket.As a result, can
Efficiently the exhaust gas flowed in exhaust gas return flow line is cooled down using the cooling water in water jacket, meanwhile, it is capable to suppress
Water jacket bulk temperature rises.
Brief description of the drawings
Fig. 1 is the schematic diagram for representing to employ the part-structure of the internal combustion engine of embodiment of the present utility model.
Fig. 2 is the schematic diagram for cooling down current direction in the internal combustion engine for represent Fig. 1.
Fig. 3 is the section for the exhaust gas return flow line for representing the EGR channel involved by embodiment of the present utility model
Sectional view.
Fig. 4 is the sectional view in the section of the exhaust gas return flow line for the EGR channel for representing prior art.
Embodiment
Hereinafter, embodiment of the present utility model is illustrated referring to the drawings.
In present embodiment, the example that structure of the present utility model is applied to water-cooled engine is illustrated.
Fig. 1 shows to employ the part-structure of the internal combustion engine 1 of the EGR channel 20 of present embodiment.Internal combustion engine shown in Fig. 1
1 is water-cooled engine, possesses the cylinder block (not shown) that is provided with four cylinders formed a line and installed in the cylinder block
The cylinder head 10 on top.
In cylinder head 10, middle part is formed with combustion chamber 11 corresponding with each cylinder difference, and inlet manifold 12 is located at
Air inlet side, exhaust manifold 13 is located at exhaust side.In addition, inlet manifold 12 passes through each inlet end for being connected respectively with each combustion chamber 11
Mouthfuls 14 and connected with combustion chamber 11, exhaust manifold 13 by with each exhaust port 15 that each combustion chamber 11 is connected respectively with burning
Room 11 is connected.
End in the opposite side of the side connected with combustion chamber 11 of exhaust manifold 13, is connected to one of blast pipe 16
End, another end of the blast pipe 16 is provided with the arrangement for catalytic purification 17 for purifying exhaust gas.
In addition, being provided with internal combustion engine 1, a part for the exhaust gas being discharged in exhaust manifold 13 is set to be back to air inlet discrimination
The EGR channel 20 that pipe 12 is recycled.EGR channel 20 possesses, from exhaust manifold 13 that a part for exhaust gas is derived
Exhaust side EGR conduit 21；Make exhaust side EGR conduit 21 the exhaust gas return flow line that is cooled down of derived exhaust gas
22；And the air inlet side EGR conduit 23 that will be sent into the exhaust gas after exhaust gas return flow line 22 is cooled down in inlet manifold 12.
Exhaust side EGR conduit 21 is arranged to, and an end is connected with exhaust manifold 13；Another end and exhaust gas
The end connection of return flow line 22.Air inlet side EGR conduit 23 is arranged to, and an end is connected with inlet manifold 12；Separately
One end is connected by EGR valve 24 with another end of exhaust gas return flow line 22.
On the other hand, the water jacket 30 of Cooling Water circulation is provided with cylinder head 10.Water jacket 30 includes being arranged on cylinder head
The top water jacket 31 on 10 tops and the bottom water jacket 32 for being arranged on the bottom of cylinder head 10.Fig. 2 shows the cooling water in internal combustion engine 1
Flow direction.As denoted by the arrows in fig. 2, cooling water is admitted to the block jacket 41 being provided with cylinder block by water pump
In, the cooling water for flowing through block jacket 41 flows to bottom water jacket 32, and the cooling water for flowing through bottom water jacket 32 flows to top water jacket
31, the cooling water for flowing through top water jacket 31 finally flows to heat exchanger.
Exhaust gas return flow line 22 is arranged on the side vertical with the orientation of combustion chamber 11 of cylinder head 10
In side wall (the side wall of downside in Fig. 1).Specifically, exhaust gas return flow line 22 is formed, top water jacket 31 with heat exchange
In side wall between the connected side of device and bottom water jacket 32.Fig. 3 shows section (that is, Fig. 1 of the exhaust gas return flow line 22
Section B-B).
As shown in figure 3, exhaust gas return flow line 22 possesses, connect with top water jacket 31, and along with combustion chamber 11
1st side wall 221 of the vertical direction of orientation (that is, the circulating direction of exhaust gas) extension；Connect with bottom water jacket 32, and
The 2nd side wall 222 that vertical direction (that is, the circulating direction of exhaust gas) extends along the orientation with combustion chamber 11；And
Will be opposite and to the 1st side wall 221 and the 2nd side wall 222 the 3rd side wall 223 and the 4th side wall 224 that link.
In addition, being formed with the internal face of the 1st side wall 221, vertically flowed back from the 1st side wall 221 to exhaust gas
Regulation extension elongation h1 multiple (being 2 in present embodiment) the 1st side fin 221a is stretched out in the inside of passage 22；In the 2nd side
It is formed with, is vertically stretched from the 2nd side wall 222 to stretching regulation inside exhaust gas return flow line 22 on the internal face of wall 222
Go out length h2 multiple (being 2 in present embodiment) the 2nd side fin 222a.Here, the 1st side fin 221a and the 1st side
Wall 221 forms as one；2nd side fin 222a forms as one with the 2nd side wall 222.
That is, exhaust gas return flow line 22 has by the 1st side wall 221 and the 2nd side wall 222, the 3rd side wall 223 and the 4th side wall
224 and 2 the 1st side fin 221a and 2 the 2nd side fin 222a are separated into, section is the passage of approximate " king " font
22a.Because between passage 22a and top water jacket 31 across the 1st side wall 221；Between passage 22a and bottom water jacket 32 only across
2nd side wall 222, therefore, when exhaust gas flows through in passage 22a, can by the 1st side wall 221 and the 2nd side wall 222 with it is upper
The cooling water flowed through in portion's water jacket 31 and bottom water jacket 32 carries out heat exchange and is cooled.Further, since on the 1st side wall 221
Form the 1st side fin 221a；The 2nd side fin 222a is formd on the 2nd side wall 222, so, flowed in passage 22a
The area increase that the exhaust gas crossed is contacted with the wall of surrounding, improves the efficiency of heat exchange.
Further, in the present embodiment, as shown in figure 3, (that is, cold in the top water jacket 31 with being connected to heat exchanger
But water discharge side) the 1st side fin 221a regulation extension elongation h1 that is formed on the 1st side wall 221 that connects is more than with
The 2nd side fin 222a formed on the 2nd side wall 222 that portion's water jacket 32 connects regulation extension elongation h2.
Based on said structure, the area contacted due to the exhaust gas flowed through in passage 22a with the 1st side fin 221a
It is larger, flow to heat exchanger thus it is possible to give more heat transfers from top water jacket 31 by the 1st side fin 221a
Heat, is then quickly discharged into outside (heat exchanger) by cooling water by the cooling water.As a result, exhaust gas can not only be improved
The cooling effect of the exhaust gas flowed through in body return flow line 22, and the overall temperature rise of water jacket 30 can also be suppressed.
In present embodiment, in the opposite of exhaust gas return flow line 22 and to two inwalls on set 2 respectively
The example of individual fin is illustrated, still, and the number to fin is not limited or 1 or more than 3.
In present embodiment, for being formed between the top water jacket 31 and bottom water jacket 32 that the inside of cylinder head 10 is provided with
The example of exhaust gas return flow line 22 is illustrated, but is not limited to this, for example, it is also possible in the water of cooling water discharge side
Exhaust gas return flow line is formed between set and air cooling passage.In addition, being formed for the water jacket vicinity only in cooling water discharge side
The structure of exhaust gas return flow line, is also suitable the structure of exhaust gas return flow line 22 of the present utility model, i.e. can use
The regulation extension elongation of the fin formed on the side wall that the water jacket with cooling water discharge side connects is set to longer knot
Structure.
Further, for the cooling duct vicinity that is arranged on the exhaust gas return flow line of EGR channel outside cylinder head
Structure, be also suitable the structure of exhaust gas return flow line 22 of the present utility model, i.e. can use will connect with cooling duct
The regulation extension elongation of the fin formed on the wall of side is set to longer structure.
Claims (2)
1. a kind of EGR channel, inlet channel is back to for making the part of exhaust gas from exhaust passage, it is cold with being arranged on
But in the exhaust gas return flow line of passage vicinity, the internal perisporium of the exhaust gas return flow line, it is opposite and to the 1st side wall and
The 1st side that the stretching regulation extension elongation to the inside of the exhaust gas return flow line is respectively formed with the internal face of 2nd side wall dissipates
Backing and the 2nd side fin, it is characterised in that：
The exhaust gas return flow line is configured to, and the 1st side wall is than the 2nd side wall closer to the cooling duct
Refrigerant discharge side, the regulation extension elongation of the 1st side fin is more than the regulation stretching of the 2nd side fin
Length.
2. EGR channel as claimed in claim 1, it is characterised in that：
The cooling duct is the water jacket of cylinder head, and the exhaust gas return flow line is configured near the water jacket, institute
The 1st side wall is stated than the 2nd side wall closer to the side being connected with heat exchanger of the water jacket, is formed on the 1st side wall
The regulation extension elongation of the 1st side fin be more than the institute of the 2nd side fin formed on the 2nd side wall
State regulation extension elongation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621064948.4U CN206386201U (en) | 2016-09-20 | 2016-09-20 | EGR channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621064948.4U CN206386201U (en) | 2016-09-20 | 2016-09-20 | EGR channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206386201U true CN206386201U (en) | 2017-08-08 |
Family
ID=59486976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621064948.4U Active CN206386201U (en) | 2016-09-20 | 2016-09-20 | EGR channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206386201U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020045871A (en) * | 2018-09-20 | 2020-03-26 | ダイハツ工業株式会社 | Internal combustion engine egr device |
| CN111971467A (en) * | 2020-02-17 | 2020-11-20 | 株式会社小松制作所 | Cylinder head and engine |
-
2016
- 2016-09-20 CN CN201621064948.4U patent/CN206386201U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020045871A (en) * | 2018-09-20 | 2020-03-26 | ダイハツ工業株式会社 | Internal combustion engine egr device |
| CN111971467A (en) * | 2020-02-17 | 2020-11-20 | 株式会社小松制作所 | Cylinder head and engine |
| US11242819B2 (en) | 2020-02-17 | 2022-02-08 | Komatsu Ltd. | Cylinder head and engine |
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| GR01 | Patent grant |