CN205172763U - EGR (exhaust gas recirculation) system - Google Patents
EGR (exhaust gas recirculation) system Download PDFInfo
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- CN205172763U CN205172763U CN201521006042.2U CN201521006042U CN205172763U CN 205172763 U CN205172763 U CN 205172763U CN 201521006042 U CN201521006042 U CN 201521006042U CN 205172763 U CN205172763 U CN 205172763U
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- egr
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- cooler
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The utility model discloses a EGR (exhaust gas recirculation) system belongs to the technical field of diesel engine subsystem. Its technical scheme does: a EGR (exhaust gas recirculation) system, including exhaust manifold, the choke valve admits air, the EGR valve, the EGR cooler, EGR check valve and relevant EGR pipeline, admit air on the well cold back air inlet pipeline of choke valve setting between air intake manifold and intercooler, the EGR valve sets up at the exhaust manifold of engine rear side, the EGR valve is connected with EGR cooler inlet end, the end of giving vent to anger of EGR cooler is connected with the inlet end of EGR check valve, the end is given vent to anger through after choke valve rear side and air intake manifold front side well cold is being admitted air to the setting of EGR pipe on the air inlet pipeline to the EGR check valve. The beneficial effects of the utility model are that: the stability that is favorable to the introduction of burning back waste gas, the EGR cooling requirement of different efficiency can be realized, the EGR exhaust gas temperature that needs is obtained, the check valve can prevent when some operating mode or EGR valve complete closure, and when well cold back intake pressure was greater than EGR cooler internal pressure, well cold back air backflow was to the EGR (exhaust gas recirculation) system in.
Description
Technical field
The utility model relates to the technical field of diesel engine subsystem, particularly relates to a kind of egr system.
Background technique
Egr system and gas recirculation system refer to that the waste gas after by engine combustion is separated, and waste gas is introduced engine charge, make this portion introduce firing chamber and participate in burning.The introducing of egr system, mainly in order to reduce maximum combustion temperature, reduces the fuel economy of nox in exhaust and raising sub load.
To supercharged diesel engine, EGR implementation is divided into internal EGR and outside EGR, and internal EGR passes through the opening time and the opening degree that regulate exhaust valve, to realize different EGR rate.Its structure is simple, external equipment is not needed to realize EGR, but due to accurately EGR rate cannot be controlled by adjustment exhaust valve, and because the waste gas again participating in burning cannot cool, combustion temperature is caused to raise, to the reduction DeGrain of nitrogen oxide, adopt the motor of internal EGR few in the market.
Common External EGR systems is divided into low pressure EGR system and high pressure EGR system by its arrangement, and low pressure EGR system refers to and is incorporated in the air inlet before supercharging by gas of combustion, charge inter cooling after air and waste gas mixing, enters firing chamber and participates in burning.Low pressure EGR system structure is relatively simple, very easily realizes EGR, but the pollution of waste gas to pressurized machine is it needs a major issue of solution.
High pressure EGR system refers to and exhaust gases after combustion is incorporated into suction tude after charge inter cooling, enter firing chamber after mixing and participate in burning, this egr system is divided into the devices such as gas exhaust manifold, EGR valve, cooler for recycled exhaust gas, one-way valve, many egr systems adopt cold junction EGR valve technology and lifting type EGR valve to carry out the adjustment of EGR rate, but this mode bad response, control accuracy is not high.
Model utility content
The purpose of this utility model is to provide a kind of external high pressure egr system be applied on large diesel engine, high-temperature exhaust air to be incorporated into after charge inter cooling in air inlet by this egr system, and complete the control of quantity of inhale gas and the cooling of waste gas, realize the accurate control of EGR rate, reduce combustion temperature, reduce the egr system of nox in exhaust content.
Invention thinking of the present utility model: the technical program adopts hot junction Twin channel EGR valve introduce gas of combustion and regulate, the waste gas introduced is cooled waste gas by full flow type cooler for recycled exhaust gas, cooled waste gas is suction tude after cold during one-way valve enters, and completes the recirculation of waste gas.
A kind of egr system, comprise gas exhaust manifold, intake-air throttle valve, EGR valve, cooler for recycled exhaust gas, EGR one-way valve and relevant EGR pipe road, described intake-air throttle valve to be arranged between intake manifold and intercooler on cold rear air inlet pipeline, described EGR valve is arranged on rear side of the described gas exhaust manifold of motor, described EGR valve is connected with described cooler for recycled exhaust gas inlet end, the outlet side of described cooler for recycled exhaust gas is connected with the inlet end of described EGR one-way valve, described EGR one-way valve outlet side through on rear side of EGR pipe is arranged on described intake-air throttle valve with described intake manifold on front side of in cold after on air inlet pipeline.
Described EGR valve is Twin channel butterfly EGR valve.
Described cooler for recycled exhaust gas is full flow type cooler for recycled exhaust gas.
By test, the beneficial effects of the utility model are: in egr system Twin channel EGR valve get gas strategy, be conducive to the stability of the introducing of exhaust gases after combustion; Egr system adopts Twin channel butterfly EGR valve, and response is fast, and control accuracy is high; The control of EGR rate realizes accurately controlling, by the EGR rate control overflow selecting different EGR valve final controlling element to realize different accuracy by the final controlling element be arranged in EGR valve; Cooler for recycled exhaust gas is connected in engine-cooling system, and by selecting different cooler for recycled exhaust gas structures, the EGR that can realize different efficiency cools requirement, obtains the EGR exhaust gas temperature needed; After EGR cooling, exhaust pipe is furnished with one-way valve, one-way valve can prevent when some operating mode or EGR valve are closed completely, in cold rear suction pressure when being greater than cooler for recycled exhaust gas internal pressure, in cold rear air return in egr system; After throttle valve is arranged in charge inter cooling, before the mixing of EGR waste gas, can control to assist to some operating mode EGR rate.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Wherein, reference character is: 1, motor; 2, intake manifold; 3, gas exhaust manifold; 4, intercooler; 5, intake-air throttle valve; 7, EGR valve; 8, cooler for recycled exhaust gas; 9, EGR one-way valve.
Embodiment
In order to the technical characterstic of this programme can be clearly demonstrated, below by embodiment, this programme is set forth.
Embodiment 1
See Fig. 1, a kind of egr system, comprise gas exhaust manifold 3, intake-air throttle valve 5, EGR valve 7, cooler for recycled exhaust gas 8, EGR one-way valve 9 and relevant EGR pipe road, intake-air throttle valve 5 to be arranged between intake manifold 2 and intercooler 4 on cold rear air inlet pipeline, EGR valve 7 is arranged on rear side of the gas exhaust manifold 3 of motor 1, EGR valve 7 is connected with cooler for recycled exhaust gas 8 inlet end, the outlet side of cooler for recycled exhaust gas 8 is connected with the inlet end of EGR one-way valve 9, EGR one-way valve 9 outlet side through on rear side of EGR pipe is arranged on intake-air throttle valve 5 with intake manifold 2 on front side of in cold after on air inlet pipeline.EGR valve 7 is Twin channel butterfly EGR valve.Cooler for recycled exhaust gas 8 is full flow type cooler for recycled exhaust gas.
In order to introducing portion exhaust gases after combustion enters in gas handling system, participate in the burning of motor, need egr system to realize.Waste gas is drawn from enmgine exhaust, waste gas is connected with Twin channel EGR valve with rear three cylinder air outlet flues respectively by first three cylinder air outlet flue, waste gas realizes cooling through cooler for recycled exhaust gas after EGR valve is introduced at regular time and quantity, exhaust gas temperature is reduced, the waste gas of lower temperature, through EGR one-way valve, enters into cold rear suction tude by EGR pipe on rear side of intake-air throttle valve, realizes mixing of waste gas and fresh air, after mixing, gas is by intake manifold, enters motor and participates in burning.The final controlling element be integrated in EGR valve coordinates valve body to realize the adjustment of EGR valve opening time and aperture, to realize the EGR rate that motor needs.The EGR control response time required for difference and control accuracy, realize by selecting different EGR valve final controlling element.Intake-air throttle valve, in some operating mode, by regulating charge flow rate, realizes supplementing EGR rate adjustment.
The utility model can pass through without the technical characteristics described or adopt existing techniques in realizing, do not repeat them here, certainly, above-mentioned explanation is not to restriction of the present utility model, the utility model is also not limited in above-mentioned citing, the change that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also should belong to the utility model.
Claims (3)
1. an egr system, comprise gas exhaust manifold (3), intake-air throttle valve (5), EGR valve (7), cooler for recycled exhaust gas (8), EGR one-way valve (9) and relevant EGR pipe road, it is characterized in that, described intake-air throttle valve (5) to be arranged between intake manifold (2) and intercooler (4) on cold rear air inlet pipeline, described EGR valve (7) is arranged on described gas exhaust manifold (3) rear side of motor (1), described EGR valve (7) is connected with described cooler for recycled exhaust gas (8) inlet end, the outlet side of described cooler for recycled exhaust gas (8) is connected with the inlet end of described EGR one-way valve (9), described EGR one-way valve (9) outlet side is after cold during EGR pipe is arranged on described intake-air throttle valve (5) rear side and described intake manifold (2) front side on air inlet pipeline.
2. egr system according to claim 1, is characterized in that, described EGR valve (7) is Twin channel butterfly EGR valve.
3. egr system according to claim 1, is characterized in that, described cooler for recycled exhaust gas (8) is full flow type cooler for recycled exhaust gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521006042.2U CN205172763U (en) | 2015-12-08 | 2015-12-08 | EGR (exhaust gas recirculation) system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521006042.2U CN205172763U (en) | 2015-12-08 | 2015-12-08 | EGR (exhaust gas recirculation) system |
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| Publication Number | Publication Date |
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| CN205172763U true CN205172763U (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521006042.2U Active CN205172763U (en) | 2015-12-08 | 2015-12-08 | EGR (exhaust gas recirculation) system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339986A (en) * | 2018-12-19 | 2019-02-15 | 安徽江淮汽车集团股份有限公司 | A kind of egr system |
| CN110439681A (en) * | 2019-08-20 | 2019-11-12 | 中国重汽集团济南动力有限公司 | A kind of in-line five cylinders diesel engine |
| CN113958417A (en) * | 2021-10-21 | 2022-01-21 | 中国重汽集团济南动力有限公司 | EGR (exhaust gas recirculation) one-way valve high-temperature protection control method and device and storage medium |
| CN114087094A (en) * | 2021-11-10 | 2022-02-25 | 中国重汽集团济南动力有限公司 | Parallel EGR cooling system and cooling method |
-
2015
- 2015-12-08 CN CN201521006042.2U patent/CN205172763U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339986A (en) * | 2018-12-19 | 2019-02-15 | 安徽江淮汽车集团股份有限公司 | A kind of egr system |
| CN110439681A (en) * | 2019-08-20 | 2019-11-12 | 中国重汽集团济南动力有限公司 | A kind of in-line five cylinders diesel engine |
| CN113958417A (en) * | 2021-10-21 | 2022-01-21 | 中国重汽集团济南动力有限公司 | EGR (exhaust gas recirculation) one-way valve high-temperature protection control method and device and storage medium |
| CN113958417B (en) * | 2021-10-21 | 2024-01-23 | 中国重汽集团济南动力有限公司 | High-temperature protection control method and device for EGR check valve and storage medium |
| CN114087094A (en) * | 2021-11-10 | 2022-02-25 | 中国重汽集团济南动力有限公司 | Parallel EGR cooling system and cooling method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |