CN102840014A - Air-assisted injection system for diesel engine urea after-treatment SCR (Selective Catalytic Reduction) system - Google Patents
Air-assisted injection system for diesel engine urea after-treatment SCR (Selective Catalytic Reduction) system Download PDFInfo
- Publication number
- CN102840014A CN102840014A CN201110166869XA CN201110166869A CN102840014A CN 102840014 A CN102840014 A CN 102840014A CN 201110166869X A CN201110166869X A CN 201110166869XA CN 201110166869 A CN201110166869 A CN 201110166869A CN 102840014 A CN102840014 A CN 102840014A
- Authority
- CN
- China
- Prior art keywords
- urea
- nozzle
- aqueous solution
- diesel engine
- air
- 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.)
- Pending
Links
Images
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
-
- 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
- Y02T10/40—Engine management systems
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses an air-assisted injection system for a diesel engine urea after-treatment SCR (Selective Catalytic Reduction) system; the system comprises a urea box assembly, a urea pump assembly, a compressed air assembly, a nozzle, a sensor and a controller. A urea aqueous solution is filtered and pumped to the front end of the nozzle from a urea box by the urea pump assembly; and according to information of SCR catalyzer front and back sensors and engine information, logic calculation is performed by the controller to control an electromagnetic valve on the nozzle, so as to control injection quantity of the urea aqueous solution. After compressed air is filtered, the pressure of the compressed air is regulated to 5-8 bars by a pressure regulating valve, and then the compressed air enters the nozzle through a pipeline, the electromagnetic valve and the urea aqueous solution are cooled on the nozzle, and an injection assisting effect on the urea aqueous solution is obtained near injection holes of the nozzle. An OBD function of the SCR system is achieved by the controller. The air-assisted injection system for the diesel engine urea after-treatment, disclosed by the invention, has the advantages of lower cost, good atomization effect, high catalytic conversion rate, prevention for crystallizing and blocking of the nozzle, and so on; and overhigh temperatures of the electromagnetic valve and the urea aqueous solution can be avoided.
Description
Technical field
Patent of the present invention relates to diesel exhaust aftertreatment system field, relates to a kind of urea-spray system that is used to reduce urea selective reduction SCR (the Selective Catalyst Reduction) system of Diesel NOx discharging in particular.
Background technique
China's large diesel engine has been implemented in full state III emission standard, and developed regions such as Beijing, Shanghai, Guangzhou have also come into effect state IV emission standard successively, and plan to implement in full in January, 2012 state IV emission standard.Compare with state III emission standard, the emission limit of the NOx of state IV emission standard descends about 30%, and the emission limit of PM descends about 60%.Be main various emission controls by improving combustion technology (like improving and optimizating of combustion manner, electric control fuel oil jet system, charge inter cooling etc.) only, be difficult to satisfy the requirement of discharging by improving diesel engine combustion.Therefore, on the basis of the advanced emission controls by improving combustion of diesel engine, increase the development trend that the exhaust aftertreatment technology becomes the control diesel emission.
According to the experience of developed country, current realization state IV emission standard mainly contains two kinds of technology path: first EGR+DPF/DOC, promptly reduces the growing amount of NOx earlier through exhaust gas recirculation, again through the grain catcher trap particulate matter.It two is SCR technology, promptly through optimized combustion, reduces the growing amount of particulate matter, allows to increase the discharge amount of NOx simultaneously, and then reduces the discharge amount of NOx through the SCR technology.Experimental result shows: state IV diesel engine using SCR technology is than adopting EGR to add particle trap technology oil consumption low about 5%.When selecting the SCR technology path to realize state IV, have reliability height, good stability, fuel consumption is low, specific power is high, the drain period is long, heat radiation requires advantages such as low, and when upgrading state V, SCR is easier than EGR.Especially the SCR technology is insensitive to the Sulpher content of fuel oil, so the SCR technology is considered to meet most one of post-processing technology China's actual conditions, that can satisfy state IV emission request.
The urea SCR ejecting system of extensive use at present mainly is divided into two types: air-assisted injection system and no air-assisted injection system.The auxiliary SCR system of air generally accomplishes aqueous solution of urea and compressed-air actuated mixing in the urea-spray pump; Both mixtures are sprayed onto in the outlet pipe along pipeline and nozzle under compressed-air actuated pressure then; The SCR system nozzle arrangements of this form is simple, the spray atomization effect better, be difficult for stopping up, but it is higher to the having relatively high expectations of urea-spray pump, cost.The auxiliary SCR system of no air is general direct to set up pressure through urea pump, controls the injection of aqueous solution of urea then through the electromagnetic valve type nozzle that is installed in exhaust wall.The SCR system jet pump of this form simple in structure, cost is lower; But nozzle arrangements more complicated; Especially the solenoid valve on the nozzle need cool off; Usually adopt the engine cooling water cycle that nozzle is cooled off at present, in addition because the atomizing effect of no air booster action spraying is also relatively poor.
In addition, it is local-crystalized that the generation of chemical reaction formation polymer can take place when temperature is too high in pipeline and nozzle aqueous solution of urea, can influence the function even the plug nozzle of nozzle behind the long time integration.The temperature of the aqueous solution of urea of nozzle interior preferably remains on below 95 ℃ in practical application.Because the general delivery temperature of diesel engine when high load possibly reach 500-600 ℃, therefore need take certain cooling method, in order to avoid aqueous solution of urea is overheated.
Summary of the invention
What the present invention will solve is the above-mentioned defective that existing technology exists; Its objective is: help spray and air cooling effect through on the auxiliary SCR system of no air nozzle basis, having introduced pressurized air; Overcome the shortcoming of auxiliary SCR system nozzle spray effect of no air and cooling effect difference, provide a kind of air that is used for diesel engine reprocessing urea SCR system to help the spray ejecting system.
For realizing above purpose, the technological scheme that the present invention adopts is:
A kind of air that is used for diesel engine reprocessing urea SCR system helps the spray ejecting system; It comprises urea box assembly, urea pump assembly, pressurized air assembly, nozzle, sensor and controller (DCU) thereof, it is characterized in that described urea box assembly comprises urea box, urea level sensor, urea temperature transducer and strainer composition; Described urea pump assembly comprises electric-motor pump, one-way valve and filter; Described pressurized air assembly comprises filter, pressure regulator valve and first solenoid valve composition; Described nozzle is sprayed by the second electromagnetic valve aqueous solution of urea, by pressurized air aqueous solution of urea is carried out pressure and helps spray and nozzle second solenoid valve and aqueous solution of urea cooled off; Described sensor comprises temperature transducer and the NOx sensor before and after the SCR catalyst converter; Described controller (DCU) has realizes the accurately emitted dose and the OBD of the SCR system function of control aqueous solution of urea.
The air of diesel engine reprocessing urea SCR of the present invention system helps the spray ejecting system; Aqueous solution of urea is drawn into spray nozzle front end by the urea pump assembly through filtering from urea box, carry out the emitted dose that logical calculated is controlled the electromagnetic valve aqueous solution of urea on the nozzle according to sensor information before and after the SCR catalyst converter and engine information by controller (DCU).Pressurized air to 5-8bar, gets into nozzle through pipeline by the pressure regulator valve pressure regulation through after filtering then, on nozzle, solenoid valve and aqueous solution of urea is cooled off, and near the nozzle spray orifice, aqueous solution of urea is played the spray effect that helps.Realize the SCR OBD of system function through controller (DCU).
Advantage of the present invention is: because nozzle of the present invention has adopted the injection of electromagnetic valve aqueous solution of urea, so the SCR system can adopt the jet pump of lower cost.Because the present invention has introduced pressurized air and the aqueous solution of urea of nozzle has been carried out pressure helped the spray design, therefore the atomizing effect of spraying is better, helps the catalyzed conversion effect of SCR.In addition, pressurized air helps to clear up and sprays the residual droplets of accomplishing on the rear nozzle and can effectively avoid the nozzle crystallization to stop up.Since the present invention adopted pressurized air to the solenoid valve of nozzle with aqueous solution of urea carries out heat insulation and cooling, so can avoid solenoid valve and aqueous solution of urea temperature too high and cause adverse consequences.
As further improvement of the present invention, described nozzle comprises aqueous solution of urea circulation pipeline and pressurized air circulation pipeline, it is characterized in that described pressurized air circulation pipeline comprises The initial segment pipeline and the main paragraph pipeline with compressed air inlet; The top of described aqueous solution of urea circulation pipeline is provided with the aqueous solution of urea inlet; Main body is provided with solenoid valve and places the main paragraph pipeline of described pressurized air circulation pipeline inner; Offer compressed air outlet on the terminal sidewall; Should link to each other with the end of pressurized air circulation pipeline by end simultaneously, and be provided with the umbrella shape shower nozzle; Described umbrella shape shower nozzle is provided with several spray orifices.It is inner that aqueous solution of urea circulation pipeline is positioned at pressurized air circulation pipeline, and pressurized air cools off solenoid valve and aqueous solution of urea pipeline thereof when its pipeline flows; The injection of aqueous solution of urea is by electromagnetic valve, and aqueous solution of urea got into aqueous solution of urea circulation pipeline when solenoid valve was opened, and arrived the spray orifice zone and sprayed in the outlet pipe compressed-air actuated helping under the spray effect.
Because nozzle of the present invention has adopted the injection of electromagnetic valve aqueous solution of urea, so the SCR system can adopt the jet pump of lower cost.Because the present invention has introduced pressurized air and the aqueous solution of urea of nozzle has been carried out pressure helped spray and umbrella shape sprinkler design, therefore the atomizing effect of spraying is better, helps the catalyzed conversion effect of SCR.In addition, pressurized air helps to clear up and sprays the residual droplets of accomplishing on the rear nozzle and can effectively avoid the nozzle crystallization to stop up.Since the present invention adopted pressurized air to the solenoid valve of nozzle with aqueous solution of urea carries out heat insulation and cooling, so can avoid solenoid valve and aqueous solution of urea temperature too high and cause adverse consequences.
Further improve again as of the present invention, described umbrella shape shower nozzle comprise 1 center of orifices be positioned at said center of orifices concentric circumference on one or more groups peripheral spray orifice.Center of orifices is sprayed along the outlet pipe axial direction, and the oblique outlet pipe direction of peripheral spray orifice is sprayed, and makes the atomizing effect of aqueous solution of urea of ejection better, has further reduced the phenomenon that aqueous solution of urea is run into exhaust wall simultaneously.Said every group of peripheral spray orifice is advisable with 4-6.
As the present invention's improvement further, the end of described aqueous solution of urea circulation pipeline is a horn mouth, can be connected with the umbrella shape shower nozzle better, also helps compressed-air actuated importing simultaneously.
A kind of aqueous solution of urea circulation shell and monolithic case that is used for the nozzle of diesel engine reprocessing urea SCR system of the present invention adopts 304 or 304 above stainless steel materials to make, with high temperature and the aqueous solution of urea characteristic that is adapted to diesel exhaust gas.
Description of drawings
Fig. 1 helps the structured flowchart that sprays ejecting system for the air that the present invention is used for diesel engine reprocessing urea SCR system.
Fig. 2 helps the structure of nozzle schematic representation that sprays ejecting system for the air that the present invention is used for diesel engine reprocessing urea SCR system.
Fig. 3 is used for the front elevation of diesel engine reprocessing urea SCR system nozzle for the present invention.
Fig. 4 is used for the right side view of diesel engine reprocessing urea SCR system nozzle for the present invention.
Among the figure, the end 5010 of the aqueous solution of urea circulation pipeline of the shower nozzle 509 of the urea spray orifice 508 of the compressed air outlet 507 of the solenoid valve 506 of the pressurized air circulation pipeline 504 and 505 of the aqueous solution of urea inlet 502 of the compressed air inlet 501 of temperature transducer 7, NOx sensor 8, controller (DCU) 9, pipeline 10, strainer 11, nozzle, nozzle, nozzle aqueous solution of urea circulation pipeline 503, nozzle, nozzle, nozzle, nozzle, nozzle, nozzle, the central spray orifice 5011 of nozzle, the peripheral spray orifice 5012 of nozzle behind urea box assembly 1, urea level and temperature transducer 2, urea pump assembly 3, pressurized air assembly 4, nozzle 5, the preceding temperature transducer 6 of SCR catalyst converter, the SCR catalyst converter.
Embodiment
Contrast accompanying drawing below; Through description to embodiment; Specific embodiments of the invention, for example: the effect of mutual alignment relation between the shape of each structure, structure and the each several part and annexation, each several part and working principle etc. are done further detailed explanation.
With reference to Fig. 1,2, a kind of air that is used for diesel engine reprocessing urea SCR system of the present invention helps the spray ejecting system, and it comprises urea box assembly 1, urea pump assembly 3, pressurized air assembly 4, nozzle 5, sensor 6,7,8 and controller (DCU) 9 thereof.
Described urea box assembly 1 is made up of urea box, urea level and temperature transducer 2, strainer 11.
Described urea pump assembly 3 is made up of the better simply electric-motor pump of structure, one-way valve, filter etc.
Described pressurized air assembly 4 is made up of filter, pressure regulator valve, solenoid valve.
Described nozzle 5 is sprayed by solenoid valve 506 control aqueous solution of urea, by pressurized air aqueous solution of urea is carried out pressure and helps spray and nozzle solenoid valve and aqueous solution of urea are cooled off.
Described sensor comprises temperature transducer 6,7 and the NOx sensor 8 before and after the SCR catalyst converter.
Described controller (DCU) 9 has realizes the accurately emitted dose and the OBD of the SCR system function of control aqueous solution of urea.
Aqueous solution of urea is drawn into spray nozzle front end by urea pump assembly 3 through filtering from urea box assembly 1, carry out the emitted dose that logical calculated is controlled the opening degree and then the control aqueous solution of urea of the solenoid valve 506 on the nozzle according to sensor 6,7 information before and after the SCR catalyst converter and engine information by controller (DCU) 9.After pressurized air is filtered by pressurized air assembly 4 processes; By the pressure regulator valve pressure regulation to 5-8bar; Get into nozzle 5 through pipeline 10 then, on nozzle 5, solenoid valve 506 and aqueous solution of urea are cooled off, and near nozzle spray orifice 5011, aqueous solution of urea is played the spray effect that helps.The atomizing effect of such spraying is better, helps the catalyzed conversion effect of SCR.In addition, pressurized air helps to clear up and sprays the residual droplets of accomplishing on the rear nozzle and can effectively avoid the nozzle crystallization to stop up.Realize the SCR OBD of system function through controller (DCU) 9 and urea level and temperature transducer 2, NOx sensor 8 etc. simultaneously.
With reference to Fig. 2, Fig. 3 and Fig. 4, nozzle of the present invention, it comprises aqueous solution of urea circulation pipeline 503 and pressurized air circulation pipeline 504,505.
Described pressurized air circulation pipeline 504,505 comprises The initial segment pipeline 504 and the main paragraph pipeline 505 with compressed air inlet 501.
The top of described aqueous solution of urea circulation pipeline 3 is provided with aqueous solution of urea inlet 502; Main body is provided with solenoid valve 506, and this main body and solenoid valve 506 place in the main paragraph pipeline 505 of described pressurized air circulation pipeline 505; End is a horn mouth, offers compressed air outlet 507 on its sidewall, should link to each other with the end of pressurized air circulation pipeline 504,505 by end simultaneously, and is provided with umbrella shape shower nozzle 509; Described umbrella shape shower nozzle 509 is provided with several spray orifices 508.
Aqueous solution of urea is through its inlet 502 pipelines 503 that circulate; The amount of circulation pipeline below solenoid valve 506 control aqueous solution of urea entering; Aqueous solution of urea enters into stub area 5010 through lower end circulation pipeline, is injected to the Diesel Engine Exhaust Pipe from spray orifice 8 compressed-air actuated assisting down then.Pressurized air circulates in pipeline 504 and 505 through its inlet 501, flows to compressed air outlet 507 zones along the circulate direction of pipeline 503 of aqueous solution of urea, sprays in the Diesel Engine Exhaust Pipe at this pressing aid aqueous solution of urea.During work, pressurized air cools off aqueous solution of urea in solenoid valve 506 and the circulation pipeline 503 in the process of flowing in its circulation pipeline.Spray orifice of the present invention adopts beveled structure; An aperture 5011 is arranged in center in umbrella shape, and 504 apertures 5012 of circumferential directions on the outer peripheral areas inclined-plane form 5 bundle sprayings like this; The centre is a branch of sprays along the outlet pipe axial direction; The oblique outlet pipe direction of other 4 bundles is sprayed, and can produce materialization effect preferably like this, has reduced the phenomenon that aqueous solution of urea is run into exhaust wall simultaneously.
The aqueous solution of urea circulation shell of nozzle and monolithic case adopt 304 or 304 above stainless steel materials to make, with high temperature and the aqueous solution of urea characteristic that is adapted to diesel exhaust gas.
What should be understood that is: the foregoing description is just to explanation of the present invention, rather than limitation of the present invention, and any innovation and creation that do not exceed in the connotation scope of the present invention all fall within protection scope of the present invention.
Claims (6)
1. an air that is used for diesel engine reprocessing urea SCR system helps the spray ejecting system; It comprises urea box assembly (1), urea pump assembly (3), pressurized air assembly (4), nozzle (5), sensor and controller (9) thereof, and described urea box assembly (1) comprises urea box (12), urea level sensor (13), urea temperature transducer (2) and strainer (14) composition; Described urea pump assembly (3) comprises electric-motor pump (15), one-way valve (16) and first filter (17); Described pressurized air assembly (4) comprises filter (18), pressure regulator valve (19) and first solenoid valve (20) composition; Described nozzle (5) is sprayed by second solenoid valve (506) control aqueous solution of urea, by pressurized air aqueous solution of urea is carried out pressure and helps spray and nozzle second solenoid valve (506) and aqueous solution of urea are cooled off; Described sensor comprises temperature transducer (6,7) and the NOx sensor (8) before and after the SCR catalyst converter; Described controller (9) has realizes the accurately emitted dose and the OBD of the SCR system function of control aqueous solution of urea.
2. the air that is used for diesel engine reprocessing urea SCR system as claimed in claim 1 helps the spray ejecting system; It is characterized in that described nozzle comprises aqueous solution of urea circulation pipeline (503) and pressurized air circulation pipeline (504,505), it is characterized in that the described pressurized air pipeline (504,505) that circulates comprises have the compressed air inlet The initial segment pipeline (504) and the main paragraph pipeline (505) of (501); The top of described aqueous solution of urea circulation pipeline (503) is provided with aqueous solution of urea inlet (502); Main body is provided with second solenoid valve (506) and places main paragraph pipeline (505) inside of described pressurized air circulation pipeline (505); Offer compressed air outlet (507) on the terminal sidewall; Should link to each other with the end of pressurized air circulation pipeline (504,505) by end simultaneously, and be provided with umbrella shape shower nozzle (509); Described umbrella shape shower nozzle (509) is provided with several spray orifices (508).
3. the air that is used for diesel engine reprocessing urea SCR system as claimed in claim 2 helps the spray ejecting system, it is characterized in that described umbrella shape shower nozzle (509) comprise 1 center of orifices (5011) and be positioned at said center of orifices (5011) concentric circumference on one or more groups peripheral spray orifice (5012).
4. the nozzle that is used for diesel engine reprocessing urea SCR system as claimed in claim 3 is characterized in that said every group of peripheral spray orifice (5012) is 4-6.
5. the nozzle that is used for diesel engine reprocessing urea SCR system as claimed in claim 2 is characterized in that the end of described aqueous solution of urea circulation pipeline (503) is a horn mouth.
6. like any one described nozzle that is used for diesel engine reprocessing urea SCR system of claim 2-5, it is characterized in that aqueous solution of urea circulation shell and monolithic case adopt 304 or 304 above stainless steel materials to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110166869XA CN102840014A (en) | 2011-06-20 | 2011-06-20 | Air-assisted injection system for diesel engine urea after-treatment SCR (Selective Catalytic Reduction) system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110166869XA CN102840014A (en) | 2011-06-20 | 2011-06-20 | Air-assisted injection system for diesel engine urea after-treatment SCR (Selective Catalytic Reduction) system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102840014A true CN102840014A (en) | 2012-12-26 |
Family
ID=47367696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110166869XA Pending CN102840014A (en) | 2011-06-20 | 2011-06-20 | Air-assisted injection system for diesel engine urea after-treatment SCR (Selective Catalytic Reduction) system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102840014A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948273A (en) * | 2015-05-13 | 2015-09-30 | 中国重汽集团济南动力有限公司 | Air assisting type urea injection system |
| CN104948276A (en) * | 2015-05-13 | 2015-09-30 | 中国重汽集团济南动力有限公司 | Air assisting type urea ejector |
| CN105422231A (en) * | 2016-01-05 | 2016-03-23 | 山东大学 | Offline multi-station universal SCR system endurance test device and method |
| CN105604665A (en) * | 2016-01-20 | 2016-05-25 | 潍柴动力股份有限公司 | Spraying characteristic analysis device and method |
| US9470132B2 (en) | 2014-12-05 | 2016-10-18 | Cummins Emission Solutions, Inc. | Compact radial exterior exhaust assisted decomposition reactor pipe |
| US9528414B2 (en) | 2013-10-14 | 2016-12-27 | Cummins Emission Solutions, Inc. | Diesel exhaust fluid deposit mitigation |
| CN106285854A (en) * | 2015-05-07 | 2017-01-04 | 浙江福爱电子有限公司 | A kind of SCR liquid injection apparatus |
| US9650933B2 (en) | 2014-06-13 | 2017-05-16 | Cummins Emission Solutions, Inc. | In-line decomposition reactor pipe with exhaust assist |
| CN106988838A (en) * | 2017-05-03 | 2017-07-28 | 安徽合力股份有限公司 | A kind of internal combustion engineering machinery exhaust aftertreatment pipe-line system |
| CN107420164A (en) * | 2017-04-28 | 2017-12-01 | 东风商用车有限公司 | Tyre urea nozzle air cools down the urea injection system and application method of branch road |
| CN107448267A (en) * | 2017-07-01 | 2017-12-08 | 福士汽车零部件（济南）有限公司 | A kind of inlet air filtration component for air auxiliary SCR aftertreatment system |
| CN107916973A (en) * | 2017-11-29 | 2018-04-17 | 东风商用车有限公司 | A kind of SCR urea sprays protection system |
| CN108590820A (en) * | 2018-06-20 | 2018-09-28 | 中国第汽车股份有限公司 | A kind of urea injection system and its control method of crystallization-preventive |
| CN108625944A (en) * | 2017-03-20 | 2018-10-09 | 天纳克（苏州）排放***有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
| CN109098826A (en) * | 2017-06-20 | 2018-12-28 | 南阳瑞格实业有限公司 | Exhaust treatment system applied to high-power diesel engine |
| CN109723523A (en) * | 2018-12-27 | 2019-05-07 | 宁波安创电子科技有限公司 | A kind of adjustable urea nozzle of flow |
| US11525380B2 (en) | 2019-01-11 | 2022-12-13 | Cummins Emission Solutions Inc. | Aftertreatment system with multiple dosing modules |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0037156A1 (en) * | 1980-03-29 | 1981-10-07 | Stamicarbon B.V. | Process for the spraying of a liquid by means of a gas |
| US7497077B2 (en) * | 2006-07-26 | 2009-03-03 | Southwest Research Institute | System and method for dispensing an aqueous urea solution into an exhaust gas stream |
| CN101491794A (en) * | 2009-01-08 | 2009-07-29 | 浙江大学 | High-speed jet gas-liquid mixing-phase ejector |
| CN201778868U (en) * | 2010-09-09 | 2011-03-30 | 中国第一汽车集团公司 | One-valve double-control jet apparatus for urea reducing agents |
| CN202157846U (en) * | 2011-06-20 | 2012-03-07 | 杭州银轮科技有限公司 | Air-assisted injection system for diesel engine post-treating urea silicon controlled rectifier (SCR) system |
-
2011
- 2011-06-20 CN CN201110166869XA patent/CN102840014A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0037156A1 (en) * | 1980-03-29 | 1981-10-07 | Stamicarbon B.V. | Process for the spraying of a liquid by means of a gas |
| US7497077B2 (en) * | 2006-07-26 | 2009-03-03 | Southwest Research Institute | System and method for dispensing an aqueous urea solution into an exhaust gas stream |
| CN101491794A (en) * | 2009-01-08 | 2009-07-29 | 浙江大学 | High-speed jet gas-liquid mixing-phase ejector |
| CN201778868U (en) * | 2010-09-09 | 2011-03-30 | 中国第一汽车集团公司 | One-valve double-control jet apparatus for urea reducing agents |
| CN202157846U (en) * | 2011-06-20 | 2012-03-07 | 杭州银轮科技有限公司 | Air-assisted injection system for diesel engine post-treating urea silicon controlled rectifier (SCR) system |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10024213B2 (en) | 2013-10-14 | 2018-07-17 | Cummins Emission Solutions Inc. | Diesel exhaust fluid deposit mitigation |
| US9528414B2 (en) | 2013-10-14 | 2016-12-27 | Cummins Emission Solutions, Inc. | Diesel exhaust fluid deposit mitigation |
| US9650933B2 (en) | 2014-06-13 | 2017-05-16 | Cummins Emission Solutions, Inc. | In-line decomposition reactor pipe with exhaust assist |
| US9470132B2 (en) | 2014-12-05 | 2016-10-18 | Cummins Emission Solutions, Inc. | Compact radial exterior exhaust assisted decomposition reactor pipe |
| CN106285854B (en) * | 2015-05-07 | 2019-08-27 | 浙江福爱电子有限公司 | A kind of SCR liquid injection apparatus |
| CN106285854A (en) * | 2015-05-07 | 2017-01-04 | 浙江福爱电子有限公司 | A kind of SCR liquid injection apparatus |
| CN104948276A (en) * | 2015-05-13 | 2015-09-30 | 中国重汽集团济南动力有限公司 | Air assisting type urea ejector |
| CN104948273A (en) * | 2015-05-13 | 2015-09-30 | 中国重汽集团济南动力有限公司 | Air assisting type urea injection system |
| CN105422231A (en) * | 2016-01-05 | 2016-03-23 | 山东大学 | Offline multi-station universal SCR system endurance test device and method |
| CN105422231B (en) * | 2016-01-05 | 2018-06-26 | 山东大学 | A kind of universal SCR system durability test apparatus of offline multistation and method |
| CN105604665A (en) * | 2016-01-20 | 2016-05-25 | 潍柴动力股份有限公司 | Spraying characteristic analysis device and method |
| CN108625944A (en) * | 2017-03-20 | 2018-10-09 | 天纳克（苏州）排放***有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
| CN107420164A (en) * | 2017-04-28 | 2017-12-01 | 东风商用车有限公司 | Tyre urea nozzle air cools down the urea injection system and application method of branch road |
| CN107420164B (en) * | 2017-04-28 | 2023-10-10 | 东风商用车有限公司 | Urea injection system with external urea nozzle air cooling branch and use method |
| CN106988838A (en) * | 2017-05-03 | 2017-07-28 | 安徽合力股份有限公司 | A kind of internal combustion engineering machinery exhaust aftertreatment pipe-line system |
| CN109098826A (en) * | 2017-06-20 | 2018-12-28 | 南阳瑞格实业有限公司 | Exhaust treatment system applied to high-power diesel engine |
| CN107448267A (en) * | 2017-07-01 | 2017-12-08 | 福士汽车零部件（济南）有限公司 | A kind of inlet air filtration component for air auxiliary SCR aftertreatment system |
| CN107448267B (en) * | 2017-07-01 | 2024-03-26 | 福士汽车零部件（济南）有限公司 | Air inlet filter assembly for air-assisted SCR aftertreatment system |
| CN107916973B (en) * | 2017-11-29 | 2020-08-04 | 东风商用车有限公司 | SCR urea sprays protection system |
| CN107916973A (en) * | 2017-11-29 | 2018-04-17 | 东风商用车有限公司 | A kind of SCR urea sprays protection system |
| CN108590820A (en) * | 2018-06-20 | 2018-09-28 | 中国第汽车股份有限公司 | A kind of urea injection system and its control method of crystallization-preventive |
| CN108590820B (en) * | 2018-06-20 | 2024-05-07 | 中国第一汽车股份有限公司 | Anti-crystallization urea injection system and control method thereof |
| CN109723523A (en) * | 2018-12-27 | 2019-05-07 | 宁波安创电子科技有限公司 | A kind of adjustable urea nozzle of flow |
| CN109723523B (en) * | 2018-12-27 | 2020-05-19 | 宁波安创电子科技有限公司 | Flow adjustable urea nozzle |
| US11525380B2 (en) | 2019-01-11 | 2022-12-13 | Cummins Emission Solutions Inc. | Aftertreatment system with multiple dosing modules |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102840014A (en) | Air-assisted injection system for diesel engine urea after-treatment SCR (Selective Catalytic Reduction) system | |
| US9528414B2 (en) | Diesel exhaust fluid deposit mitigation | |
| CN104295348B (en) | The nozzle cooling system and technology of diesel exhaust gas fluid injection system | |
| CN102748101B (en) | Urea injection system for reducing NOx discharge of engine and control method thereof | |
| CN204327283U (en) | A kind of vehicular engine | |
| CN202157846U (en) | Air-assisted injection system for diesel engine post-treating urea silicon controlled rectifier (SCR) system | |
| US20110120097A1 (en) | Urea SCR diesel aftertreatment system | |
| CN102836792A (en) | Spray nozzle for post-treatment urea SCR (Silicon Controlled Rectifier) system of diesel engine | |
| CN105822394A (en) | Gas-liquid mixing type engine exhaust after-treatment jet apparatus | |
| CN202789025U (en) | Urea injection system for reducing emission of nitrogen oxide (NOx) of engine | |
| CN105986861A (en) | SCR tail gas treatment system for engine | |
| KR102447698B1 (en) | Reductant supply system and method for managing the same | |
| CN202162098U (en) | Nozzle used for post-processing urea SCR (Selective Catalyst Reduction) system of diesel engine | |
| CN206144635U (en) | Processing apparatus after integrated injection formula of SCR | |
| CN107916973B (en) | SCR urea sprays protection system | |
| CN205190012U (en) | Cartridge SCR aftertreatment hybrid chamber | |
| CN202012386U (en) | Mixing device for urea SCR system of diesel engine | |
| CN104847463A (en) | Nozzle integrated SCR post treatment unit and method thereof | |
| KR101476757B1 (en) | Exhaust gas purification system | |
| CN204511592U (en) | A kind of SCR exhaust treatment system for motor | |
| CN204402627U (en) | A kind of engine exhaust reprocessing multiphase flow jetstream whirl nozzle | |
| CN102085453A (en) | Mixing device for diesel engine urea SCR system | |
| CN207686807U (en) | Vent gas treatment urea mixing device | |
| CN208330572U (en) | Diesel engine cooling EGR discharge treating system | |
| CN216342391U (en) | Tail gas post-treatment device for non-road diesel engine by using liquid ammonia as SDPF reducing agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121226 |