CN208534649U - A kind of engine EGR system - Google Patents
A kind of engine EGR system Download PDFInfo
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- CN208534649U CN208534649U CN201820896539.3U CN201820896539U CN208534649U CN 208534649 U CN208534649 U CN 208534649U CN 201820896539 U CN201820896539 U CN 201820896539U CN 208534649 U CN208534649 U CN 208534649U
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Abstract
A kind of engine EGR system, including engine assembly, booster, cooler for recycled exhaust gas, booster includes coaxially connected compressor, turbine, the exhaust end of compressor passes sequentially through No.1 air inlet pipeline, No. two air inlet pipelines are communicated with the inlet manifold of engine assembly, the inlet end of turbine is communicated by being provided with the gas exhaust piping of control valve with the exhaust manifold of engine assembly, AIR Proportional valve is provided on No.1 air inlet pipeline, the first exhaust end of AIR Proportional valve is communicated with No. two air inlet pipelines, the second exhaust end of AIR Proportional valve is communicated by No. two bypass lines with the inlet end of cooler for recycled exhaust gas, the first row port of control valve is communicated with turbine, the second exhaust port of control valve is communicated by being provided with the No.1 bypass line of cooler for recycled exhaust gas with No. two air inlet pipelines.The design effectively increases the quality of EGR gaseous mixture.
Description
Technical field
The utility model belongs to technical field of automobile engine, and in particular to a kind of engine EGR system is suitable for improving
The quality of EGR gaseous mixture.
Background technique
Exhaust gas recycling (EGR) system is engine exhaust to be drawn to exhaust pipe, and pass through control valve for suitable exhaust gas
It imports in air inlet pipe and is mixed with fresh mix device, enter back into and participate in burning in combustion chamber, to realize circulation.Since it can have
Effect reduces NOXDischarge, European most of direct injections and non-direct injection light diesel engine are all made of the system.In large diesel engine
In, diesel engine is formulated with countries in the world NOXDischarge standard is increasingly stringenter, and EGR technology is also increasingly taken seriously.
Existing EGR system mostly uses hole pipe structure to introduce exhaust gas into engine intake manifold, such as China
Patent: publication number CN1735747A, publication date on 2 15th, 2006 disclosure of the invention are used together with turbocharged engine
Dual hybrid EGR systems, using one or two low pressure, medium-pressure or high pressure operate EGR loop, EGR exhaust can be straight
It connects from enmgine exhaust taking-up or the exhaust stream by being taken out after a turbocharger turbine.Although the system can
EGR exhaust is effectively ensured with enough pressure, but the mixing uniformity of EGR exhaust is poor, gaseous mixture it is of low quality, to influence
The performance of engine.
Summary of the invention
The purpose of the utility model is to overcome the second-rate problems of EGR gaseous mixture existing in the prior art, provide
A kind of engine EGR system that can effectively improve EGR mixed gas quality.
In order to achieve the above object, the utility model provides following technical scheme:
A kind of engine EGR system, including engine assembly, booster, cooler for recycled exhaust gas, the booster include coaxial
Compressor, the turbine of connection, the exhaust end of the compressor pass sequentially through No.1 air inlet pipeline, No. two air inlet pipelines and start
The inlet manifold of machine assembly communicates, and the inlet end of the turbine is by being provided with the gas exhaust piping and engine assembly of control valve
Exhaust manifold communicate, and the first row port of control valve is communicated with turbine, and the second exhaust port of control valve is by being provided with
The No.1 bypass line of cooler for recycled exhaust gas is communicated with No. two air inlet pipelines；
Be provided with AIR Proportional valve on the No.1 air inlet pipeline, the first exhaust end of the AIR Proportional valve with No. two into
Air pipe communicates, and the second exhaust end of AIR Proportional valve is communicated by No. two bypass lines with the inlet end of cooler for recycled exhaust gas.
The system also includes exhaust mixer, the No.1 inlet end of the exhaust mixer, No. two inlet ends respectively with
First exhaust end, cooler for recycled exhaust gas exhaust end communicate, the exhaust end of exhaust mixer is communicated with No. two air inlet pipelines.
Dilution mixer, the first inlet end of the dilution mixer, second are additionally provided on the No.1 bypass line
Inlet end is communicated with No. two bypass lines, second exhaust port respectively, dilutes the exhaust end of mixer and the inlet end of cooler for recycled exhaust gas
It communicates.
Be additionally provided with intercooler on the No.1 air inlet pipeline, the inlet and outlet end of the intercooler respectively with first exhaust
End, No.1 inlet end communicate.
The control valve is exhaust gas fraction valve.
The inlet end of the compressor is communicated with air cleaner, and the exhaust end of the turbine is communicated with preprocessor.
Compared with prior art, the utility model has the following beneficial effects:
1, it is provided with AIR Proportional valve on No.1 air inlet pipeline in a kind of engine EGR system of the utility model, the air
The first exhaust end of proportioning valve is communicated with No. two air inlet pipelines, and second exhaust end passes through No. two bypass lines and cooler for recycled exhaust gas
Inlet end communicates, which is mixed to form pre- by taking part fresh air in air inlet pipeline with the exhaust gas from control valve
Gaseous mixture is mixed to form final EGR gaseous mixture with fresh air after cooler for recycled exhaust gas is cooling again, to adjust two kinds of mixing
The mode of gas momentum ratio effectively increases the quality of EGR gaseous mixture.Therefore, the utility model improves the matter of EGR gaseous mixture
Amount.
2, the junction setting of No.1 air inlet pipeline in a kind of engine EGR system of the utility model, No. two air inlet pipelines
There is exhaust mixer, and be additionally provided with dilution mixer on No.1 bypass line, can further be mentioned by adding above-mentioned mixer
The mixing efficiency of high EGR exhaust and fresh air.Therefore, the utility model further improves EGR exhaust and fresh air
Mixing efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment 1.
Fig. 2 is the structural schematic diagram of the utility model embodiment 2.
In figure, engine assembly 1, exhaust manifold 11, inlet manifold 12, booster 2, compressor 21, turbine 22, EGR
Cooler 3, No.1 gas exhaust piping 4, control valve 41, first row port 411, second exhaust port 412, No.1 air inlet pipeline 5, air
Proportioning valve 51, first exhaust end 511, the air inlet pipeline 6 of second exhaust end 512, two, No.1 bypass line 7, dilution mixer
71, the first inlet end 711,712, No. two bypass lines 8 of the second inlet end, exhaust mixer 9, No.1 inlet end 91, two into
Gas end 92, air cleaner 101, preprocessor 102.
Specific embodiment
The utility model is further described With reference to embodiment.
Referring to Fig. 1, Fig. 2, a kind of engine EGR system, including engine assembly 1, booster 2, cooler for recycled exhaust gas 3, it is described
Booster 2 includes coaxially connected compressor 21, turbine 22, and the exhaust end of the compressor 21 passes sequentially through No.1 air inlet pipe
The air inlet pipeline 6 of road 5, two is communicated with the inlet manifold of engine assembly 1, and the inlet end of the turbine 22 is by being provided with control
The gas exhaust piping 4 of valve 41 processed is communicated with the exhaust manifold 11 of engine assembly 1, and the first row port 411 of control valve 41 and whirlpool
Turbine 22 communicates, the second exhaust port 412 of control valve 41 by be provided with cooler for recycled exhaust gas 3 No.1 bypass line 7 and No. two into
Air pipe 6 communicates；
AIR Proportional valve 51, the first exhaust end 511 of the AIR Proportional valve 51 are provided on the No.1 air inlet pipeline 5
It is communicated with No. two air inlet pipelines 6, the second exhaust end 512 of AIR Proportional valve 51 passes through No. two bypass lines 8 and cooler for recycled exhaust gas 3
Inlet end communicate.
The system also includes exhaust mixer 9, described 91, No. two inlet ends of the No.1 inlet end for stating exhaust mixer 9
92 communicate with the exhaust end at first exhaust end 511, cooler for recycled exhaust gas 3 respectively, the exhaust end of exhaust mixer 9 and No. two air inlet pipe
Road 6 communicates.
Dilution mixer 71, the first inlet end of the dilution mixer 71 are additionally provided on the No.1 bypass line 7
711, the second inlet end 712 is communicated with No. two bypass lines 8, second exhaust port 412 respectively, dilute mixer 71 exhaust end with
The inlet end of cooler for recycled exhaust gas 3 communicates.
It is additionally provided with intercooler 52 on the No.1 air inlet pipeline 5, the inlet and outlet end of the intercooler 52 is respectively with first
Exhaust end 511, No.1 inlet end 91 communicate.
The control valve 41 is exhaust gas fraction valve.
The inlet end of the compressor 21 is communicated with air cleaner 101, the exhaust end of the turbine 22 and post-processing
Device 102 communicates.
The principle of the utility model material is described as follows:
The utility model provides a kind of engine EGR system, which takes part fresh air from the front end of intercooler
Be pre-mixed with EGR exhaust, the gaseous mixture of generation after cooler for recycled exhaust gas is cooling in exhaust mixer with fresh air again
Mixing, to provide the EGR gaseous mixture of high quality for engine, concrete principle is as follows:
Through the filtered air of air cleaner 101 after the pressurization of compressor 21, under the action of AIR Proportional valve 51, one
Part fresh air enters exhaust mixer 9 after flowing through the cooling of intercooler 52, and another part fresh air is then and from control valve
41 EGR exhaust converges after (or mixing in dilution mixer 71) forms premix gas and enters cooling in cooler for recycled exhaust gas 3, then
Premixed flow enters exhaust mixer 9 and mixes with fresh air, finally enters engine assembly 1 via inlet manifold 12 and participates in combustion
It burns.
Embodiment 1:
Referring to Fig. 1, a kind of engine EGR system, including the mixing of engine assembly 1, booster 2, cooler for recycled exhaust gas 3, exhaust gas
Device 9, the booster 2 include coaxially connected compressor 21, turbine 22, the inlet end and air-filtering of the compressor 21
Device 101 communicates, and the exhaust end of compressor 21 passes sequentially through 5, No. two air inlet pipelines 6 of No.1 air inlet pipeline and engine assembly 1
Inlet manifold 12 communicates, and the inlet end of the turbine 22 is by being provided with the gas exhaust piping 4 and engine assembly 1 of control valve 41
Exhaust manifold 11 communicate, the exhaust end of turbine 22 is communicated with preprocessor 102, and control valve 41 be exhaust gas fraction valve,
First row port 411 is communicated with turbine 22, and the second exhaust port 412 of control valve 41 is by being provided with the No.1 of cooler for recycled exhaust gas 3
Bypass line 7 is communicated with No. two air inlet pipelines 6, and AIR Proportional valve 51, intercooler 52 are provided on the No.1 air inlet pipeline 5,
The first exhaust end 511 of the AIR Proportional valve 51 is communicated by intercooler 52 with the No.1 inlet end 91 of exhaust mixer 9, empty
The second exhaust end 512 of gas proportioning valve 51 is communicated by No. two bypass lines 8 with the inlet end of cooler for recycled exhaust gas 3, and the exhaust gas is mixed
No. two inlet ends 92 of clutch 9 are communicated with the exhaust end of cooler for recycled exhaust gas 3, the exhaust end of exhaust mixer 9 and No. two air inlet pipelines
6 communicate.
Embodiment 2:
Referring to fig. 2, in 1 structure of embodiment the difference is that:
Dilution mixer 71, the first inlet end of the dilution mixer 71 are additionally provided on the No.1 bypass line 7
711, the second inlet end 712 is communicated with No. two bypass lines 8, second exhaust port 412 respectively, dilute mixer 71 exhaust end with
The inlet end of cooler for recycled exhaust gas 3 communicates.
Claims (6)
1. a kind of engine EGR system, including engine assembly (1), booster (2), cooler for recycled exhaust gas (3), the booster
It (2) include coaxially connected compressor (21), turbine (22), the exhaust end of the compressor (21) passes sequentially through No.1 air inlet
Pipeline (5), No. two air inlet pipelines (6) communicate with the inlet manifold (12) of engine assembly (1), the air inlet of the turbine (22)
End is communicated by being provided with the gas exhaust piping (4) of control valve (41) with the exhaust manifold (11) of engine assembly (1), and control valve
(41) first row port (411) is communicated with turbine (22), and the second exhaust port (412) of control valve (41) is by being provided with
The No.1 bypass line (7) of cooler for recycled exhaust gas (3) is communicated with No. two air inlet pipelines (6), it is characterised in that:
It is provided with AIR Proportional valve (51) on the No.1 air inlet pipeline (5), the first exhaust end of the AIR Proportional valve (51)
(511) it is communicated with No. two air inlet pipelines (6), the second exhaust end (512) of AIR Proportional valve (51) passes through No. two bypass lines (8)
It is communicated with the inlet end of cooler for recycled exhaust gas (3).
2. a kind of engine EGR system according to claim 1, it is characterised in that: the system also includes exhaust gas mixing
Device (9), the No.1 inlet end (91) of the exhaust mixer (9), No. two inlet ends (92) respectively with first exhaust end (511),
The exhaust end of cooler for recycled exhaust gas (3) communicates, and the exhaust end of exhaust mixer (9) is communicated with No. two air inlet pipelines (6).
3. a kind of engine EGR system according to claim 1 or 2, it is characterised in that: the No.1 bypass line (7)
On be additionally provided with dilution mixer (71), it is described dilution mixer (71) the first inlet end (711), the second inlet end (712)
It is communicated respectively with No. two bypass lines (8), second exhaust port (412), dilutes the exhaust end and cooler for recycled exhaust gas of mixer (71)
(3) inlet end communicates.
4. a kind of engine EGR system according to claim 2, it is characterised in that: on the No.1 air inlet pipeline (5) also
Be provided with intercooler (52), the inlet and outlet end of the intercooler (52) respectively with first exhaust end (511), No.1 inlet end
(91) it communicates.
5. a kind of engine EGR system according to claim 1 or 2, it is characterised in that: the control valve (41) is exhaust gas
Proportioning valve.
6. a kind of engine EGR system according to claim 1 or 2, it is characterised in that: the air inlet of the compressor (21)
End is communicated with air cleaner (101), and the exhaust end of the turbine (22) is communicated with preprocessor (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820896539.3U CN208534649U (en) | 2018-06-11 | 2018-06-11 | A kind of engine EGR system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820896539.3U CN208534649U (en) | 2018-06-11 | 2018-06-11 | A kind of engine EGR system |
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| Publication Number | Publication Date |
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| CN208534649U true CN208534649U (en) | 2019-02-22 |
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ID=65381855
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| CN201820896539.3U Active CN208534649U (en) | 2018-06-11 | 2018-06-11 | A kind of engine EGR system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469432A (en) * | 2019-07-29 | 2019-11-19 | 东风商用车有限公司 | A kind of controllable egr system of application integration valve |
| CN110486196A (en) * | 2019-07-29 | 2019-11-22 | 东风商用车有限公司 | A kind of double entrances integrate the controllable egr system of EGR valve |
| CN110500208A (en) * | 2019-07-29 | 2019-11-26 | 东风商用车有限公司 | A kind of controllable egr system of application integration binary channels cooler for recycled exhaust gas |
| CN110529299A (en) * | 2019-07-29 | 2019-12-03 | 东风商用车有限公司 | A kind of controllable egr system for applying double entrance pile-up valves |
| CN110529298A (en) * | 2019-07-29 | 2019-12-03 | 东风商用车有限公司 | A kind of double entrances integrate the controllable egr system of hot and cold EGR valve |
| CN111894766A (en) * | 2020-07-27 | 2020-11-06 | 东风商用车有限公司 | Vehicle system with low-pressure EGR loop |
-
2018
- 2018-06-11 CN CN201820896539.3U patent/CN208534649U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469432A (en) * | 2019-07-29 | 2019-11-19 | 东风商用车有限公司 | A kind of controllable egr system of application integration valve |
| CN110486196A (en) * | 2019-07-29 | 2019-11-22 | 东风商用车有限公司 | A kind of double entrances integrate the controllable egr system of EGR valve |
| CN110500208A (en) * | 2019-07-29 | 2019-11-26 | 东风商用车有限公司 | A kind of controllable egr system of application integration binary channels cooler for recycled exhaust gas |
| CN110529299A (en) * | 2019-07-29 | 2019-12-03 | 东风商用车有限公司 | A kind of controllable egr system for applying double entrance pile-up valves |
| CN110529298A (en) * | 2019-07-29 | 2019-12-03 | 东风商用车有限公司 | A kind of double entrances integrate the controllable egr system of hot and cold EGR valve |
| CN110500208B (en) * | 2019-07-29 | 2020-10-27 | 东风商用车有限公司 | Controllable EGR system applying integrated double-channel EGR cooler |
| CN110486196B (en) * | 2019-07-29 | 2020-10-30 | 东风商用车有限公司 | Controllable EGR system of integrated EGR valve of two entrances |
| CN111894766A (en) * | 2020-07-27 | 2020-11-06 | 东风商用车有限公司 | Vehicle system with low-pressure EGR loop |
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