CN208518791U - A kind of waste gas circulation pipe structure - Google Patents
A kind of waste gas circulation pipe structure Download PDFInfo
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- CN208518791U CN208518791U CN201820706738.3U CN201820706738U CN208518791U CN 208518791 U CN208518791 U CN 208518791U CN 201820706738 U CN201820706738 U CN 201820706738U CN 208518791 U CN208518791 U CN 208518791U
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- exhaust gas
- circulation pipe
- air inlet
- inlet tube
- gas
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a kind of waste gas circulation pipe structures, including being connected to the air inlet tube of cylinder and the waste gas circulation pipe being arranged on air inlet tube side wall, one side ports of waste gas circulation pipe are gas inlet nozzle, another side ports are exhaust gas air outlet, it is connected between air inlet tube and waste gas circulation pipe by exhaust gas outlet interface flange, exhaust gas air outlet passes through exhaust gas outlet interface flange and is placed in air inlet tube, and the tube wall for the extension of exhaust gas air outlet extending into air inlet tube is equipped with multiple through-holes, the front end of air inlet tube is fresh air upstream end, rear end is mixed gas outlet end.The utility model accelerates exhaust gas mixing velocity, so that exhaust gas is with fresh air, the Quick uniform in air inlet tube is mixed, and improves the EGR rate distributing uniformity of each cylinder of engine, improves the performance of engine, be effectively reduced the discharge of nitrogen oxides (NOx).
Description
Technical field
The utility model relates to technical field of engines more particularly to a kind of waste gas circulation pipe structures.
Background technique
It is by the useless of engine generation in gas recirculation system (Exhaust Gas Recirculation) abbreviation EGR
The sub-fraction of gas sends the technology that cylinder burns once again back to again, and specifically, the exhaust gas that engine is discharged is mixed with fresh air
After enter back into cylinder, main purpose is to reduce the nitrogen oxides in tail gas (NOx) discharge.
Engine EGR system off gas mixed method at present: being directly connected to air inlet tube for exhaust pipe by waste gas circulation pipe,
Exhaust gas in exhaust pipe is directly mixed with the fresh air of air inlet tube, but this scheme mixed effect is poor, is not achieved more
Ideal mixed effect causes the EGR rate distributing uniformity of each cylinder poor, and then influences the performance and comprehensive discharge of engine.
Utility model content
In order to solve the above shortcomings in the prior art, the utility model provides a kind of waste gas circulation pipe structures.
In order to solve the above-mentioned technical problem, the utility model uses a kind of following technical scheme: waste gas circulation pipe structure,
It is characterized by comprising be connected to cylinder air inlet tube and the waste gas circulation pipe being arranged on air inlet tube side wall,
One side ports of the waste gas circulation pipe are gas inlet nozzle, and another side ports are exhaust gas air outlet, air inlet tube and useless
It is connected between gas circulation pipe by exhaust gas outlet interface flange, the exhaust gas air outlet is placed in across exhaust gas outlet interface flange
Into the air inlet tube, and the tube wall for the extension of exhaust gas air outlet extending into air inlet tube is equipped with multiple lead to
The front end in hole, the air inlet tube is fresh air upstream end, and rear end is mixed gas outlet end, and the through-hole is provided with exhaust gas and goes out
Gas port is toward on the side wall of fresh air upstream end, and the through-hole opposite side of exhaust gas air outlet is inclined cutting opening.
Preferably, the air inlet tube is equipped with gas inlet interface flange, the outlet interface flange and gas inlet
Interface flange matching docking is fixed, and the exhaust gas air outlet is from exhaust gas outlet interface flange and gas inlet interface flange
It is inserted into hole in the air inlet tube, is also equipped between the exhaust gas outlet interface flange and gas inlet interface flange
Gasket seal.
Preferably, the pipe shaft of the waste gas circulation pipe is equipped with the flexible bellows put of one section of convenience.
Preferably, the through-hole is evenly arranged in the exhaust gas air outlet end of waste gas circulation pipe, through-hole diameter 4mm.
Wherein, air inlet tube is equipped with gas inlet interface flange on its external wall, for installing waste gas circulation pipe.Gasket
Between air inlet tube and EGR mixer, it mainly prevents exhaust gas leakage.It is useless that waste gas circulation pipe one end is mounted on air inlet tube
On gas intake interface flange, end is inserted into inside air inlet tube, and surface is equipped with the through-hole that flows through of gas, be evenly distributed on into
The bosom position of gas adapter tube, the other end are mounted in EGR valve exhaust gas outlet interface flange, and it is tight that both ends all pass through two M8 bolts
Gu.
The through-hole of design can allow the fresh air in air inlet tube that can be formed directly into exhaust gas air outlet, and cut
When the inclined cutting opening exhaust opened, it can allow exhaust gas that can easily be discharged naturally along the flow direction of fresh air, and
Due to the design of through-hole, just allow fresh air that can directly pour into and mix with exhaust gas, so that exhaust gas and fresh air mixed
It is more uniform.
Compared with prior art, by using the structure waste gas circulation pipe, the through-hole that fresh air passes through waste gas circulation pipe
Mixed with exhaust gas, increase the area that mix with fresh air of exhaust gas, and exhaust gas mixing velocity can be accelerated so that exhaust gas with newly
Fresh air Quick uniform in air inlet tube mixes, and improves the EGR rate distributing uniformity of each cylinder of engine, improves the property of engine
Can, it is effectively reduced the discharge of nitrogen oxides (NOx).
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the side view of the utility model；
Fig. 3 is the waste gas circulation pipe structural schematic diagram of the utility model；
Fig. 4 is the air inlet tube structural schematic diagram of the utility model.
Specific embodiment
Utility model is described in detail with reference to the accompanying drawings and examples.
As shown in Figures 1 to 4, the utility model proposes waste gas circulation pipe structure, including be connected to cylinder into
Gas adapter tube 3 and the waste gas circulation pipe 1 being arranged on air inlet tube side wall, a side ports of waste gas circulation pipe 1 are exhaust inlet pipe
Mouthful, another side ports are exhaust gas air outlet, pass through exhaust gas outlet interface flange 12 between air inlet tube 3 and waste gas circulation pipe 1
Connection, exhaust gas air outlet pass through exhaust gas outlet interface flange and are placed in air inlet tube, and exhaust gas air outlet is extend into
The tube wall of extension in air inlet tube is equipped with multiple through-holes 13, and the front end of air inlet tube is fresh air upstream end 31,
Rear end is mixed gas outlet end 32, and through-hole 13 is provided with exhaust gas air outlet toward on the side wall of fresh air upstream end, and
The through-hole opposite side of exhaust gas air outlet is inclined cutting opening.
Air inlet tube 3 is equipped with gas inlet interface flange 33, outlet interface flange 12 and gas inlet interface flange 33
Matching docking is fixed, and exhaust gas air outlet is inserted into from the mesoporous of exhaust gas outlet interface flange and gas inlet interface flange 33
Into air inlet tube, gasket seal 2 is also equipped between exhaust gas outlet interface flange 12 and gas inlet interface flange 33.
The pipe shaft of waste gas circulation pipe 1 is equipped with the flexible bellows 11 put of one section of convenience.Through-hole 13 is evenly arranged in useless
The exhaust gas air outlet end of gas circulation pipe, through-hole diameter 4mm.
Waste gas circulation pipe provided in this embodiment includes: waste gas circulation pipe 1, gasket seal 2, air inlet tube 3, air inlet tube
3 outer walls are equipped with gas inlet interface flange 33, and exhaust gas outlet interface flange 12 is connect by two M8 bolts with air inlet tube 3
Together, gasket seal 2 is installed between air inlet tube 3 and the assembly of waste gas circulation pipe 1, exhaust gas leakage is prevented, from fresh sky
The air of gas upstream end 31 pass through through-hole 21, with waste gas circulation pipe come out exhaust gas in air inlet tube it is full and uniform mix after,
Enter cylinder by mixed gas outlet end 32.After waste gas circulation pipe 1 is mounted on air inlet tube 3, through-hole 13 be evenly distributed on into
The middle position of gas adapter tube 3, and waste gas circulation pipe end axis and air inlet tube FAI Fresh Air Intake end axis perpendicular, exhaust gas
Flow direction is vertical with fresh air flow direction (see the gas flow direction of Fig. 1), and through-hole 13 is evenly arranged in waste gas circulation
Pipe end, evenly distributed 5 row, every row successively evenly distributed 3,2,3,2,3 through-holes, through-hole diameter 4mm, and waste gas circulation pipe
Most next round is higher than 3 inner wall of air inlet tube.By using the waste gas circulation pipe of the utility model, fresh air passes through through-hole
13, the exhaust gas come out with waste gas circulation pipe is mixed, and increases the contact area of exhaust gas and fresh air, and it is mixed to accelerate exhaust gas
Speed is closed, so that exhaust gas is quickly sufficiently mixed in air inlet tube 1, the EGR rate distributing uniformity of each cylinder of engine is improved, improves
Engine performance is effectively reduced the discharge of nitrogen oxides (NOx).
Above-described embodiment only expresses the several embodiments of the utility model, and the description thereof is more specific and detailed, but simultaneously
It cannot be therefore understands that for a limitation on the scope of the patent of the present invention.It should be pointed out that for the ordinary skill people of this field
For member, without departing from the concept of the premise utility, various modifications and improvements can be made, these belong to this reality
With novel protection scope.Therefore, the utility model patent and protection scope should be subject to the appended claims.
Claims (4)
1. a kind of waste gas circulation pipe structure, it is characterised in that: air inlet tube (3) and setting including being connected to cylinder exist
Waste gas circulation pipe (1) on air inlet tube side wall, a side ports of the waste gas circulation pipe (1) are gas inlet nozzle, another
Side ports are exhaust gas air outlet, between air inlet tube (3) and waste gas circulation pipe (1) even by exhaust gas outlet interface flange (12)
It connecing, the exhaust gas air outlet passes through exhaust gas outlet interface flange and is placed in the air inlet tube, and exhaust gas air outlet
The tube wall for extending into the extension in air inlet tube is equipped with multiple through-holes (13), and the front end of the air inlet tube is fresh sky
Gas upstream end (31), rear end are mixed gas outlet end (32), and the through-hole (13) is provided with exhaust gas air outlet toward fresh
On the side wall of air entrance end, and the through-hole opposite side of exhaust gas air outlet is inclined cutting opening.
2. waste gas circulation pipe structure as described in claim 1, it is characterised in that: the air inlet tube (3) be equipped with exhaust gas into
Gas interface flange (33), the outlet interface flange (12) and gas inlet interface flange (33) matching docking are fixed, described useless
Gas air outlet in the mesoporous of exhaust gas outlet interface flange and gas inlet interface flange (33) from being inserted into the air inlet connecting
In pipe, gasket seal (2) are also equipped between the exhaust gas outlet interface flange (12) and gas inlet interface flange (33).
3. waste gas circulation pipe structure as described in claim 1, it is characterised in that: set on the pipe shaft of the waste gas circulation pipe (1)
There is the flexible bellows (11) put of one section of convenience.
4. waste gas circulation pipe structure as described in claim 1, it is characterised in that: the through-hole (13) is evenly arranged in exhaust gas and follows
The exhaust gas air outlet end of endless tube, through-hole diameter 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820706738.3U CN208518791U (en) | 2018-05-14 | 2018-05-14 | A kind of waste gas circulation pipe structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820706738.3U CN208518791U (en) | 2018-05-14 | 2018-05-14 | A kind of waste gas circulation pipe structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208518791U true CN208518791U (en) | 2019-02-19 |
Family
ID=65342780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820706738.3U Active CN208518791U (en) | 2018-05-14 | 2018-05-14 | A kind of waste gas circulation pipe structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208518791U (en) |
-
2018
- 2018-05-14 CN CN201820706738.3U patent/CN208518791U/en active Active
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