CN102691557A - Urea supplying unit for air-assisting type SCR (Selective Catalyst Reaction) system - Google Patents
Urea supplying unit for air-assisting type SCR (Selective Catalyst Reaction) system Download PDFInfo
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- CN102691557A CN102691557A CN2012101935661A CN201210193566A CN102691557A CN 102691557 A CN102691557 A CN 102691557A CN 2012101935661 A CN2012101935661 A CN 2012101935661A CN 201210193566 A CN201210193566 A CN 201210193566A CN 102691557 A CN102691557 A CN 102691557A
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- urea
- mixing chamber
- air
- metering
- gas
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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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- 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
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Abstract
The invention discloses a urea supplying unit for an air-assisting type SCR (Selective Catalyst Reaction) system, comprising a urea metering and supplying system, an air supplying system, a mixing chamber system and a mixing chamber environment monitoring system, wherein the urea metering and supplying system and the air supplying system are connected with the mixing chamber system; the mixing chamber system is connected with the mixing chamber environment monitoring system and is monitored by the monitoring system; the urea metering and supplying system, the air supplying system and the mixing chamber environment monitoring system are respectively electrically connected with an ACU (Arithmetic Control Unit) control system of the whole air-assisting type SCR system and are controlled by the ACU control system. The ACU control system can obtain each type of information through a self sensor and a CAN (Controller Area Network) bus; according to working conditions of an engine, a needed spraying amount of a urea water solution is obtained through inner calculation and a metering pump is accurately controlled to spray. The urea supplying unit disclosed by the invention is not provided with a urea reflowing pipeline so that the use cost of the system is reduced; and furthermore, the urea supplying unit has the advantage of long service life.
Description
Technical field
The present invention relates to automotive emission control technique field, particularly relate to the urea supply unit that a kind of gas that is used for motor vehicle exhaust emission control helps formula SCR system.
Background technique
SCR is meant and is installed in the diesel car vent systems, with the catalytic reduction device that the NOx in the diesel emission is catalysed and reduced into N2 and O2, selects aqueous solution of urea as reducing agent.Aqueous solution of urea is ejected in the outlet pipe at the catalyzer upper reaches, and hydrolysis is produced as CO2 and ammonia under the effect of EGT and air-flow, and ammonia is reduced into free of contamination nitrogen G&W as reducing agent with NOx.Urea liquid must be according to the engine operating condition quantitative injection, thus the urea-spray system need with the control unit of engine communication.The working efficiency of SCR depends on gas temperature, and common gas row temperature reaches the above NOx transformation efficiency of 250 0C and can reach more than 85%.
At present, domestic diesel engine manufacturing enterprise tackles Abgasgesetz state IV on the horizon and more high-stage emission-reduction technology route is all clear and definite with, and SCR is a kind of efficient, practical vehicular emission control technique.Be that the SCR technology path is the optimal selection that medium and heavy diesel engine reaches IV stage emission standard.
Summary of the invention
Technical problem to be solved by this invention is to design to above-mentioned needs of the prior art a kind ofly is used for the urea supply unit that gas helps formula SCR system; This gas helps the urea supply unit of formula SCR system to need not the urea return line, can reduce system's user cost and system's long service life.
The technical problem that the present invention requires to solve can realize through following technological scheme:
A kind ofly be used for the urea supply unit that gas helps formula SCR system; Comprise urea metering supply system, air supply system, mixing chamber system, mixing chamber environmental monitoring system; Said urea metering supply system all is connected with the mixing chamber system with air supply system; Said mixing chamber system is connected with the mixing chamber environmental monitoring system and monitored by said supervisory system; Said urea metering supply system, air supply system, mixing chamber environmental monitoring system help the ACU control system of formula SCR system to be electrically connected with whole gas respectively, and controlled by this ACU control system.
Said urea metering supply system helps the urea box of formula SCR system to be connected with gas, and said air supply system helps the vehicle-mounted source of compressed air of formula SCR system to be connected with gas.
Said urea metering supply system critical piece comprises that electricity drives metering pump, metering pump outlet in the horizontal direction up and down 5
0Scope in.
Said air supply system comprises interconnective air filter, pressure regulator and solenoid valve.
Said mixing chamber environmental monitoring system comprises environment temperature sensor and pressure differential pressure pickup.
Owing to adopted as above technological scheme, the present invention has following characteristics: the urea supply unit does not have the urea return line, has reduced the user cost of system.The present invention also has the advantage of long service life.
Description of drawings
Fig. 1 is a system architecture diagram of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, below in conjunction with concrete diagram, further set forth the present invention.
As shown in Figure 1; The present invention includes urea metering supply system, air supply system, mixing chamber system, mixing chamber environmental monitoring system; Urea metering supply system is connected with the mixing chamber system with air supply system, and the mixing chamber system is connected with the mixing chamber environmental monitoring system.Urea metering supply system is connected with outside urea box; Air supply system is connected with outside vehicle-mounted source of compressed air; The supply system of urea metering simultaneously, air supply system, mixing chamber environmental monitoring system also are connected with the ACU control system, controlled in real time by the ACU control system.
Urea metering supply system critical piece is that electricity drives metering pump, can realize accurately control to supplying with urea, its outlet reference levels position up and down 5
0Scope all can.Inject the gas-liquid mixed chamber behind the metering pump metering urea liquid.
Air supply system can provide the pressurized air of 6-12 crust, and through air filter and pressure regulator (pressure regulation 4 crust) and then the solenoid valve (normally closed) through the 12V 2/2-way, solenoid valve is opened when system works, and gas is imported the mixing chamber system.
The mixing chamber system is a die cavity, when gas-liquid gets into, can produce whirlpool and mix, and also has one-way simultaneously.
The mixing chamber environmental monitoring system is monitored whether proper functioning of whole SCR system through the intrasystem working pressure of mixing chamber, and whether air feed is normal, and whether metering pump work is normal, and whether pipeline breakage etc.Implement to monitor by environment temperature sensor and pressure differential pressure pickup.
Urea liquid is supplied with must be according to engine operating condition situation quantitative injection, so the logic control circuit of quantitative injection unit is to be connected with the ACU control system.ACU goes through self-sensor and the CAN bus obtains various information, according to engine operating condition, through inner calculating, draws the aqueous solution of urea emitted dose that needs, and accurately controls metering pump and spray.
More than show and described basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification just explains principle of the present invention; The present invention also has various changes and modifications under the prerequisite that does not break away from spirit and scope of the invention, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (5)
1. one kind is used for the urea supply unit that gas helps formula SCR system; It is characterized in that; Comprise urea metering supply system, air supply system, mixing chamber system, mixing chamber environmental monitoring system; Said urea metering supply system all is connected with the mixing chamber system with air supply system; Said mixing chamber system is connected with the mixing chamber environmental monitoring system and monitored by said supervisory system, and said urea metering supply system, air supply system, mixing chamber environmental monitoring system help the ACU control system of formula SCR system to be electrically connected with whole gas respectively, and controlled by this ACU control system.
2. as claimed in claim 1ly be used for the urea supply unit that gas helps formula SCR system; It is characterized in that; Said urea metering supply system helps the urea box of formula SCR system to be connected with gas, and said air supply system helps the vehicle-mounted source of compressed air of formula SCR system to be connected with gas.
3. as claimed in claim 1 being used for is characterized in that the urea supply unit that gas helps formula SCR system, and said urea metering supply system critical piece comprises that electricity drives metering pump, metering pump outlet in the horizontal direction up and down 5
0Scope in.
4. as claimed in claim 1 being used for is characterized in that said air supply system comprises interconnective air filter, pressure regulator and solenoid valve in the urea supply unit that gas helps formula SCR system.
5. as claimed in claim 1 being used for is characterized in that the urea supply unit that gas helps formula SCR system that said mixing chamber environmental monitoring system comprises environment temperature sensor and pressure differential pressure pickup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101935661A CN102691557A (en) | 2012-06-13 | 2012-06-13 | Urea supplying unit for air-assisting type SCR (Selective Catalyst Reaction) system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101935661A CN102691557A (en) | 2012-06-13 | 2012-06-13 | Urea supplying unit for air-assisting type SCR (Selective Catalyst Reaction) system |
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| Publication Number | Publication Date |
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| CN102691557A true CN102691557A (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101935661A Pending CN102691557A (en) | 2012-06-13 | 2012-06-13 | Urea supplying unit for air-assisting type SCR (Selective Catalyst Reaction) system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147827A (en) * | 2013-03-26 | 2013-06-12 | 无锡市凯龙汽车设备制造有限公司 | Selective catalytic conversion injection system of diesel engine |
| CN103775177A (en) * | 2014-02-26 | 2014-05-07 | 周洪昌 | Heavy truck diesel-driven air-assisted atomized SCR (Selective Catalytic Reduction) urea solution injection system |
| WO2015154640A1 (en) * | 2014-03-25 | 2015-10-15 | 浙江福爱电子有限公司 | Scr injection metering module and control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1560439A (en) * | 2004-02-27 | 2005-01-05 | 清华大学 | Apparatus for supplying reducing agent to hydroxide catalyzing transforming device of internal combustion engine |
| CN201329254Y (en) * | 2008-05-28 | 2009-10-21 | 中国第一汽车集团公司 | On-vehicle SCR metering injection system capable of taking NO* in exhaust as variable |
| CN201347788Y (en) * | 2009-01-14 | 2009-11-18 | 无锡市凯龙汽车设备制造有限公司 | Air-mixing metering system for exhaust-gas disposal of vehicle |
| CN202100308U (en) * | 2011-06-21 | 2012-01-04 | 中国汽车工程研究院股份有限公司 | Selective catalytic reduction (SCR) system for urea solution metering injection |
| CN202611817U (en) * | 2012-06-13 | 2012-12-19 | 安徽艾可蓝节能环保科技有限公司 | Urea supply unit for gas assisted type semiconductor control rectifier (SCR) system |
-
2012
- 2012-06-13 CN CN2012101935661A patent/CN102691557A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1560439A (en) * | 2004-02-27 | 2005-01-05 | 清华大学 | Apparatus for supplying reducing agent to hydroxide catalyzing transforming device of internal combustion engine |
| CN201329254Y (en) * | 2008-05-28 | 2009-10-21 | 中国第一汽车集团公司 | On-vehicle SCR metering injection system capable of taking NO* in exhaust as variable |
| CN201347788Y (en) * | 2009-01-14 | 2009-11-18 | 无锡市凯龙汽车设备制造有限公司 | Air-mixing metering system for exhaust-gas disposal of vehicle |
| CN202100308U (en) * | 2011-06-21 | 2012-01-04 | 中国汽车工程研究院股份有限公司 | Selective catalytic reduction (SCR) system for urea solution metering injection |
| CN202611817U (en) * | 2012-06-13 | 2012-12-19 | 安徽艾可蓝节能环保科技有限公司 | Urea supply unit for gas assisted type semiconductor control rectifier (SCR) system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147827A (en) * | 2013-03-26 | 2013-06-12 | 无锡市凯龙汽车设备制造有限公司 | Selective catalytic conversion injection system of diesel engine |
| CN103775177A (en) * | 2014-02-26 | 2014-05-07 | 周洪昌 | Heavy truck diesel-driven air-assisted atomized SCR (Selective Catalytic Reduction) urea solution injection system |
| WO2015154640A1 (en) * | 2014-03-25 | 2015-10-15 | 浙江福爱电子有限公司 | Scr injection metering module and control method |
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Application publication date: 20120926 |