CN202348483U - Engine EGR rate improving structure - Google Patents
Engine EGR rate improving structure Download PDFInfo
- Publication number
- CN202348483U CN202348483U CN2011205189971U CN201120518997U CN202348483U CN 202348483 U CN202348483 U CN 202348483U CN 2011205189971 U CN2011205189971 U CN 2011205189971U CN 201120518997 U CN201120518997 U CN 201120518997U CN 202348483 U CN202348483 U CN 202348483U
- Authority
- CN
- China
- Prior art keywords
- egr
- valve
- egr valve
- air compressor
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 25
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 15
- 238000000034 method Methods 0.000 description 5
- 239000002912 waste gas Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035485 pulse pressure Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- -1 suction tude Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Abstract
An engine EGR rate improving structure. Including exhaust manifold (1), EGR valve (2), EGR cooler (3), intake pipe (4), air compressor machine (6), exhaust manifold (1) is connected with EGR valve (2), and EGR valve (2) are connected with EGR cooler (3), and EGR cooler (3) are connected with intake pipe (4). An EGR rate increasing pipe (5) is connected between the air compressor (6) and the EGR valve (2). The beneficial effects of the utility model reside in that: 1. the EGR rate improving pipe is connected between the air compressor and the EGR valve, high exhaust back pressure is achieved on the premise that compressed air of the air compressor is introduced into the EGR valve, EGR is adjusted through the opening degree of the calibrated EGR valve, and therefore reasonable EGR rate is achieved, and engine power loss is avoided. 2. The exhaust pipeline is simple and low in cost.
Description
Technical field
The utility model relates to engine EGR apparatus, relates in particular to a kind of engine EGR rate that improves engine EGR rate and improves structure.
Background technique
Now, big quantity research shows that adopting exhaust gas recirculation (EGR) device is to reduce the highly effective method of nitrogen oxide (NOx) growing amount.Because of the oxygen content in the waste gas is low, introducing has reduced the relative amount of oxygen in the firing chamber behind the firing chamber; Pass through waste gas cooled simultaneously, its thermal capacity is big, in combustion process, can absorb a large amount of combustion heat energies, thereby reduces the maximum combustion temperature of motor.Because the effect of above two aspects can reduce automobile greatly and discharge the amount of nitrogen oxides in the gas.Though EGR is the effective measures that reduce the motor nitrogen oxide,, if can not control exhaust mass that gets into suction tude and the ratio that gets into total gaseous mass of cylinder well, then reduce motor nitrogen oxide effect with EGR, will have a greatly reduced quality.The exhaust-gas flow route of available engine EGR, what adopt usually is outside EGR mode.Can occur in the EGR engine working process that exhaust back pressure is lower than or very near the situation of suction pressure, thereby cause the not enough situation of engine EGR rate, therefore lead for improving EGR, existing technology mainly adopts one-way valve type or intake-air throttle valve formula structure.Adopting the one-way valve type structure, is to utilize the characteristic of the peak value of pulse pressure of exhaust back pressure greater than suction press, and with the drainage of one-way valve part, the implementation part high pressure exhaust gas circulates and improves EGR and lead; Lead and improve EGR with the air inlet restriction valve arrangement, like the Chinese patent notification number: 101289975, the day for announcing: on October 22nd, 2008; Denomination of invention: " throttle valve type EGR control system "; It comprises EGR automatical control system, cooler for recycled exhaust gas, EGR combined cylinders valve, intake-air throttle valve, and said intake-air throttle valve is installed in the suction tude behind the intercooler, and egr system is got waste gas before booster turbine; Waste gas is through cooler for recycled exhaust gas and EGR combined cylinders valve, guide to the intake-air throttle valve in the suction tude after.These two kinds of structures are though can produce bigger induction-pipe depression negative pressure, drainage waste gas effectively; Improve EGR and lead, still, also can make suction tude produce bigger intake resistance; Influence charging efficiency; The power character of motor is incurred loss, and increased one-way valve or intake-air throttle valve in its structure, make that gas exhaust piping is complicated, cost is expensive.
Summary of the invention
The purpose of the utility model is: overcome existing structure and have the engine power performance loss; Increase one-way valve or intake-air throttle valve, deficiencies such as gas exhaust piping complicacy, cost costliness provide a kind of simple in structure; Cost is lower, and a kind of engine EGR rate that does not influence engine power performance improves structure.
For realizing above-mentioned purpose; The technological scheme that the utility model adopts is: a kind of engine EGR rate improves structure, comprises gas exhaust manifold, EGR valve, cooler for recycled exhaust gas, suction tude, air compressor, and said gas exhaust manifold is connected with the EGR valve; The EGR valve is connected with cooler for recycled exhaust gas; Cooler for recycled exhaust gas is connected with suction tude, between said air compressor and the EGR valve, is connecting EGR and is leading the raising pipe.
It is straight tube or diffuser pipe or Venturi tube that described EGR leads the raising pipe.
Described EGR leads that to improve the pipe diameter be 22 or 24 or 26mm.
Compared with prior art; The beneficial effect of the utility model is: 1. between air compressor and EGR valve; Connecting EGR and leading the raising pipe, utilizing the pressurized air of air compressor to feed the preceding exhaust back pressure that improves of EGR valve, regulating EGR through the aperture of demarcation EGR valve; Thereby realize that rational EGR leads, and do not have the engine power loss.2. gas exhaust piping is simple, cost is low.
Description of drawings
Fig. 1 is the structural framing figure of the utility model.
Among the figure: gas exhaust manifold 1, EGR valve 2, cooler for recycled exhaust gas 3, suction tude 4, EGR leads and improves pipe 5, air compressor 6.
Embodiment
Below in conjunction with description of drawings and embodiment the utility model is done further description, but be not restriction its protection domain.
Referring to Fig. 1; A kind of engine EGR rate improves structure, comprises gas exhaust manifold 1, EGR valve 2, cooler for recycled exhaust gas 3, suction tude 4, air compressor 6, and said gas exhaust manifold 1 is connected with EGR valve 2; EGR valve 2 is connected with cooler for recycled exhaust gas 3; Cooler for recycled exhaust gas 3 is connected with suction tude 4, between said air compressor 6 and the EGR valve 2, is connecting EGR and is leading raising pipe 5.
It can be straight tube or diffuser pipe or Venturi tube that described EGR leads raising pipe 5.
Described EGR leads that to improve the pipe diameter be 22 or 24 or 26mm.
Between air compressor 6 and EGR valve 2; Connect EGR and leading raising pipe 5; Utilize the pressurized air of air compressor 6 to feed raising exhaust back pressure in the EGR, regulate EGR through the aperture of EGR valve 2 and lead, the pressurized air and the EGR valve 2 common EGR of adjusting that reach by air compressor 6 lead; Thereby realize that rational EGR leads, and do not have the engine power loss.
Described Venturi tube is to confirm the device of flow, is gained the name by Italian physicist G.B. venturi invention.It is configured with compositions such as equal diameter entrance, contraction section, equal diameter venturi and diffuser, is series in the pipeline.Because hot air is littler than cool air density, upwards ascension produces draught head, thereby promotes air-flow to produce flowing from bottom to top, Here it is high stack effect.The principle of Venturi effect then is when obstacle is crossed in wind, and air pressure is relatively low near port above the lee face of obstacle, thereby produces suction-operated and cause flowing of air.
Said diffuser pipe is one one a big little taper pipe, and when the gas flow therein, flow velocity can reduce; Hydrodynamic pressure can raise; Act as to gas boosting, this is a kind of easy equipment that boosts, and uses also wider on the engineering; In the sparger in air breathing engine, ejector and the steam jet refrigeration, the supercharging of gas all will be used diffuser pipe.The conversion process of energy of gas in diffuser pipe, just in time with jet pipe in process opposite.
Structural other component of the utility model such as automatical control system etc. are identical with existing technology, and this paper does not give unnecessary details.
Claims (3)
1. an engine EGR rate improves structure; Comprise gas exhaust manifold (1), EGR valve (2), cooler for recycled exhaust gas (3), suction tude (4), air compressor (6); Said gas exhaust manifold (1) is connected with EGR valve (2), and EGR valve (2) is connected with cooler for recycled exhaust gas (3), and cooler for recycled exhaust gas (3) is connected with suction tude (4); It is characterized in that: between said air compressor (6) and the EGR valve (2), connecting EGR and leading raising pipe (5).
2. a kind of engine EGR rate according to claim 1 improves structure, it is characterized in that: it is straight tube or diffuser pipe or Venturi tube that described EGR leads raising pipe (5).
3. a kind of engine EGR rate according to claim 2 improves structure, it is characterized in that: described EGR leads that to improve the pipe diameter be 22 or 24 or 26mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205189971U CN202348483U (en) | 2011-12-13 | 2011-12-13 | Engine EGR rate improving structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205189971U CN202348483U (en) | 2011-12-13 | 2011-12-13 | Engine EGR rate improving structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202348483U true CN202348483U (en) | 2012-07-25 |
Family
ID=46537492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205189971U Expired - Lifetime CN202348483U (en) | 2011-12-13 | 2011-12-13 | Engine EGR rate improving structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202348483U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545535A (en) * | 2016-01-27 | 2016-05-04 | 大连依勒斯涡轮增压技术有限公司 | EGR (exhaust gas recirculation) system and exhaust gas drive device thereof |
-
2011
- 2011-12-13 CN CN2011205189971U patent/CN202348483U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545535A (en) * | 2016-01-27 | 2016-05-04 | 大连依勒斯涡轮增压技术有限公司 | EGR (exhaust gas recirculation) system and exhaust gas drive device thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DONGFENG COMMERCIAL VEHICLE CO., LTD. Free format text: FORMER OWNER: DONGFENG AUTOMOBILE CO., LTD. Effective date: 20130903 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 430056 WUHAN, HUBEI PROVINCE TO: 442001 SHIYAN, HUBEI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130903 Address after: 442001 Shiyan City, Hubei province city Zhangwan District Road No. 2 Patentee after: DONGFENG TRUCKS Co.,Ltd. Address before: 430056 Dongfeng Road, Wuhan Economic Development Zone, Hanyang District, Hubei, China, No. 10, No. Patentee before: DONGFENG MOTER Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |
|
| CX01 | Expiry of patent term |