CN202273776U - Exhaust gas recirculation (EGR) structure of diesel engine - Google Patents
Exhaust gas recirculation (EGR) structure of diesel engine Download PDFInfo
- Publication number
- CN202273776U CN202273776U CN2011203825031U CN201120382503U CN202273776U CN 202273776 U CN202273776 U CN 202273776U CN 2011203825031 U CN2011203825031 U CN 2011203825031U CN 201120382503 U CN201120382503 U CN 201120382503U CN 202273776 U CN202273776 U CN 202273776U
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- China
- Prior art keywords
- egr
- cooler
- exhaust gas
- egr valve
- air inlet
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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
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- Exhaust-Gas Circulating Devices (AREA)
Abstract
The utility model relates to an EGR (Exhaust Gas Recirculation) structure of a diesel engine. The EGR structure consists of an EGR valve, an EGR distributing pipe, an EGR cooler, an exhaust manifold, an EGR cooler connecting pipe and an EGR valve connecting pipe, and is characterized in that: the exhaust manifold is connected with one end of the EGR cooler through the EGR cooler connecting pipe; the other end of the EGR cooler is connected with an EGR valve 1 through the EGR valve connecting pipe; the EGR valve is connected with an EGR air inlet manifold through the EGR distributing pipe; the air inlet manifold is provided with four air inlet branch pipes; the EGR distributing pipe is provided with a transverse cavity structure; and a transverse cavity is connected with each branch pipe of the air inlet manifold respectively. The EGR distributing pipe is arranged between the EGR valve and the air inlet manifold, so that the EGR rate of each cylinder can be uniform easily, the developing difficulty of the air inlet manifold is lowered, and the period of CFD (Computational Fluid Dynamics) optimization analysis is shortened.
Description
Technical field
The utility model relates to a kind of discarded recirculation structure of DENG, belongs to a kind of engine design.
Background technique
The EGR technology is one of effective measures that reduce at present Diesel NOx discharging.Abroad, passenger vehicle and light truck have generally adopted the EGR technology with diesel engine, and the heavy truck diesel engine is also gradually adopting the EGR technology.The basic principle of EGR is from gas exhaust manifold, to be incorporated into the waste gas of partial combustion in the suction tude through the EGR valve, mixes laggard people firing chamber with fresh air and participates in burning once more.In order to improve the effect of EGR, need cool off EGR waste gas sometimes, promptly let waste gas draw back into tracheae again through after the cooler for recycled exhaust gas cooling.The mechanism of action of EGR is to reduce the oxygen concentration of mixed gas, absorbs the heat that burning discharges, and velocity of combustion is slowed down with the reduction FT, thereby reduces the generation quantity of NOx, finally reaches the purpose of minimizing to pollution of atmosphere.
At present, when multi-cylinder diesel engine is used egr system, among the house steward of EGR inlet after air-inlet cavity or closure; Restriction because of the architectural difference and the EGR valve position of each intake manifold; It is relatively poor that the EGR of each cylinder leads uniformity, and real EGR leads with the required EGR of discharging demarcation and leads generation than big-difference between each cylinder, and this can cause EGR to lead high cylinder particulate emission increases; And EGR leads low cylinder NOx discharging and raises, and the performance and the discharging of diesel engine had adverse effect.
Summary of the invention
The purpose of the utility model provides a kind of EGR structure of DENG, and it leads the EGR of each cylinder to have comparatively ideal uniformity.
The technological scheme of the utility model is achieved in that a kind of EGR structure of DENG; Form by EGR valve, EGR distribution piping, cooler for recycled exhaust gas, gas exhaust manifold, cooler for recycled exhaust gas connecting tube, EGR valve connecting tube; It is characterized in that: gas exhaust manifold is connected with cooler for recycled exhaust gas one end through the cooler for recycled exhaust gas connecting tube; The cooler for recycled exhaust gas the other end is connected with the EGR valve through EGR valve connecting tube, and the EGR valve is connected with the EGR intake manifold through the EGR distribution piping, and intake manifold has four arms.
Described EGR distribution piping has a horizontal cavity configuration, and each arm of horizontal chamber and intake manifold is separate connection respectively.
The good effect of the utility model is through between EGR valve and intake manifold, increasing the EGR distribution piping, the EGR of each cylinder is led be easy to reach evenly, and the development difficulty and the CFD that have reduced intake manifold optimize the cycle of analyzing.
Description of drawings
Fig. 1 is the structural drawing of the utility model.
Fig. 2 is the EGR distribution piping principle schematic of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further: like Fig. 1, shown in 2; A kind of EGR structure of DENG; Form by EGR valve 1, EGR distribution piping 2, cooler for recycled exhaust gas 3, gas exhaust manifold 4, cooler for recycled exhaust gas connecting tube 5, EGR valve connecting tube 6; It is characterized in that: gas exhaust manifold 4 is connected with cooler for recycled exhaust gas 3 one ends through cooler for recycled exhaust gas connecting tube 5; Cooler for recycled exhaust gas 3 the other ends are connected with EGR valve 1 through EGR valve connecting tube 6, and EGR valve 1 is connected with EGR intake manifold 7 through EGR distribution piping 2, and intake manifold 7 has four arms 9.
Described EGR distribution piping 2 has horizontal chamber 8 structures, and each arm 9 of horizontal chamber 8 and intake manifold 7 is separate connection respectively.
Embodiment, as shown in Figure 1, during engine operation, waste gas through cooler for recycled exhaust gas connecting tube 5, cooler for recycled exhaust gas 3 and EGR valve connecting tube 6, arrives EGR valve 1 place by gas exhaust manifold 4, and 1 adjustment of EGR valve gets into the exhausted air quantity of intake manifold 7.After waste gas is through EGR valve 1, is introduced in the EGR distribution piping 2, and then gets into intake manifold 7.
As shown in Figure 2, waste gas gets in the horizontal chamber 8 of EGR distribution piping 2, forms an air pressure metastable " source of the gas ", and " source of the gas " is input to waste gas in each arm 9 in the intake manifold 7 uniformly.
Claims (2)
1. the exhaust gas recirculation structure of a DENG; Form by EGR valve, EGR distribution piping, cooler for recycled exhaust gas, gas exhaust manifold, cooler for recycled exhaust gas connecting tube, EGR valve connecting tube; It is characterized in that: gas exhaust manifold is connected with cooler for recycled exhaust gas one end through the cooler for recycled exhaust gas connecting tube; The cooler for recycled exhaust gas the other end is connected with the EGR valve through EGR valve connecting tube, and the EGR valve is connected with the EGR intake manifold through the EGR distribution piping, and intake manifold has four arms.
2. the exhaust gas recirculation structure of a kind of DENG according to claim 1 is characterized in that described EGR distribution piping has a horizontal cavity configuration, and each arm of horizontal chamber and intake manifold is separate connection respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203825031U CN202273776U (en) | 2011-10-10 | 2011-10-10 | Exhaust gas recirculation (EGR) structure of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203825031U CN202273776U (en) | 2011-10-10 | 2011-10-10 | Exhaust gas recirculation (EGR) structure of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202273776U true CN202273776U (en) | 2012-06-13 |
Family
ID=46194138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203825031U Expired - Fee Related CN202273776U (en) | 2011-10-10 | 2011-10-10 | Exhaust gas recirculation (EGR) structure of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202273776U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221299A (en) * | 2014-05-26 | 2016-01-06 | 丰田自动车株式会社 | Exhaust gas re-circulation apparatus |
| CN106150769A (en) * | 2015-03-27 | 2016-11-23 | 长城汽车股份有限公司 | Engine pack and there is its vehicle |
| CN106812634A (en) * | 2017-01-25 | 2017-06-09 | 宁波神通模塑有限公司 | Integrated EGR valve structure on a kind of plastic air intake manifold |
| CN108915914A (en) * | 2018-06-20 | 2018-11-30 | 柳州五菱柳机动力有限公司 | A kind of natural aspiration gasoline engine Atkinson cycle implementation method |
| CN109209687A (en) * | 2018-11-02 | 2019-01-15 | 宁波市鄞州德来特技术有限公司 | Gasoline engine exhaust recirculation line structure |
-
2011
- 2011-10-10 CN CN2011203825031U patent/CN202273776U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221299A (en) * | 2014-05-26 | 2016-01-06 | 丰田自动车株式会社 | Exhaust gas re-circulation apparatus |
| US9739237B2 (en) | 2014-05-26 | 2017-08-22 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas recirculation device |
| CN106150769A (en) * | 2015-03-27 | 2016-11-23 | 长城汽车股份有限公司 | Engine pack and there is its vehicle |
| CN106150769B (en) * | 2015-03-27 | 2020-03-03 | 长城汽车股份有限公司 | Engine assembly and vehicle with same |
| CN106812634A (en) * | 2017-01-25 | 2017-06-09 | 宁波神通模塑有限公司 | Integrated EGR valve structure on a kind of plastic air intake manifold |
| CN108915914A (en) * | 2018-06-20 | 2018-11-30 | 柳州五菱柳机动力有限公司 | A kind of natural aspiration gasoline engine Atkinson cycle implementation method |
| CN108915914B (en) * | 2018-06-20 | 2021-05-11 | 柳州五菱柳机动力有限公司 | Atkinson cycle implementation method for natural aspiration gasoline engine |
| CN109209687A (en) * | 2018-11-02 | 2019-01-15 | 宁波市鄞州德来特技术有限公司 | Gasoline engine exhaust recirculation line structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120613 Termination date: 20191010 |