CN102852602A - SCR (selective catalytic reduction) system for vehicles - Google Patents
SCR (selective catalytic reduction) system for vehicles Download PDFInfo
- Publication number
- CN102852602A CN102852602A CN2011101755096A CN201110175509A CN102852602A CN 102852602 A CN102852602 A CN 102852602A CN 2011101755096 A CN2011101755096 A CN 2011101755096A CN 201110175509 A CN201110175509 A CN 201110175509A CN 102852602 A CN102852602 A CN 102852602A
- Authority
- CN
- China
- Prior art keywords
- urea
- aqueous solution
- storage tank
- heat exchanger
- scr system
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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 invention discloses an SCR (selective catalytic reduction) system for vehicles. The SCR system for vehicles comprises a urea aqueous solution storage tank (1), the urea aqueous solution storage tank (1) is provided with a first heat exchanger, and engine coolant liquid flows into the first heat exchanger from an engine through a first pipeline (5) with a valve (2), and flows back to the engine from the first heat exchanger through a second pipeline (6). According to the technical scheme, the urea aqueous solution storage tank is heated by the hot engine coolant liquid, so that excessive emission of tail gas of the vehicles due to failure of the SCR system after urea is frozen and condensed is avoided.
Description
Technical field
The present invention relates to a kind of vehicle SCR system, particularly, relate to a kind of SCR system that can thaw to urea.
Background technique
The particulate that motor car engine produces and nitrogen oxide are two kinds of topmost pollutants in the discharging.From the technological approaches of present reduction motor vehicle exhaust emission, usually adopt the mode of exhaust aftertreatment to reduce the discharge amount of pollutant, and the SCR system is the method that has realistic meaning most, it can reduce the nitrogen oxide in the motor exhaust more than 50%.
Along with the requirement of Abgasgesetz to emission standard improves day by day, SCR (selective catalytic reduction) system begins to widely apply on automotive industry.Wherein, the selective catalytic reduction technology is the main flow of denitrification process on the our times with the method for the removal of nitrogen oxide in the flue gas.Selective catalytic reduction is to utilize ammonia (NH
3) to nitrogen oxide (NO
x) reduction function, utilize catalyst action with reduction of nitrogen oxide for atmosphere is not had dysgenic N
2And water.
The SCR system generally includes: aqueous solution of urea storage tank, urea supply device, urea-spray device, catalyst converter and temperature and exhaust sensor.Vehicle exhaust out enters the exhaust mixing tube afterwards from turbine, at mixing tube urea measuring and injecting device is installed, and sprays into aqueous solution of urea, and urea at high temperature occurs to generate NH after hydrolysis and the pyrolytic reaction
3, utilize NH on SCR system catalyst surface
3Reductive NO
x, discharge N
2, the unnecessary N that also is reduced to
2, prevent from revealing.
Usually, the employed SCR of automobile system all adopts aqueous solution of urea as reducing agent.But the solidifying point of aqueous solution of urea is higher, and when temperature was lower than-11 ℃, aqueous solution of urea can freeze, and the SCR system will lose efficacy and can't work like this, and the pollutant that causes discharging exceeds standard.
Summary of the invention
The purpose of this invention is to provide a kind of vehicle SCR system, this vehicle can work under lower temperature with the SCR system.
To achieve these goals, the invention provides a kind of vehicle SCR system, this vehicle comprises the aqueous solution of urea storage tank with the SCR system, wherein, described aqueous solution of urea storage tank has the first heat exchanger, engine coolant flows into described the first heat exchanger by valvular the first pipeline of tool from motor, and flows back into described motor by the second pipeline from described the first heat exchanger.
Preferably, described valve is solenoid valve.
Preferably, described aqueous solution of urea storage tank also comprises temperature transducer, and this temperature transducer is connected with described solenoid valve, thereby controls the switch of described solenoid valve according to the temperature of urea water liquation storage tank.
Preferably, described solenoid valve conduction when the temperature of described aqueous solution of urea storage tank is lower than-11 ℃, engine coolant flows into described heat exchanger.
Preferably, described solenoid valve cut-off when the temperature of described aqueous solution of urea storage tank is higher than 90 ℃, engine coolant stops to flow into described heat exchanger.
Preferably, described vehicle also comprises urea supply device and urea-spray device with the SCR system, and described aqueous solution of urea storage tank links to each other with the urea-spray device by the urea supply device.
More preferably, described urea-spray device has the second heat exchanger, and engine coolant can flow into described the second heat exchanger from motor by the 3rd pipeline, and flows back into described motor by the 4th pipeline from described the second heat exchanger
Preferably, described the first heat exchanger is the spiral helicine pipe that is bent into that is arranged within the described aqueous solution of urea storage tank.
By technique scheme, utilize the engine coolant of heat to come the aqueous solution of urea storage tank is heated, thereby the SCR system can't work after preventing the urea cryocoagulation, causes motor vehicle exhaust emission to exceed standard.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and consists of the part of specification, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the schematic diagram that vehicle of the present invention is used a kind of preferred implementation of SCR system.
Description of reference numerals
1 aqueous solution of urea storage tank, 2 valves
3 urea supply devices, 4 urea-spray devices
5 first pipelines, 6 second pipelines
7 the 3rd pipelines 8 the 4th pipeline
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
In accompanying drawing of the present invention, the flow direction of the direction indication engine coolant that arrow is indicated.
The invention provides a kind of vehicle SCR system, this vehicle comprises aqueous solution of urea storage tank 1 with the SCR system, wherein, described aqueous solution of urea storage tank 1 has the first heat exchanger, engine coolant flows into described the first heat exchanger by the first pipeline 5 with valve 2 from motor, and flows back into described motor by the second pipeline 6 from described the first heat exchanger.
Wherein, the engine coolant that flows into aqueous solution of urea storage tank 1 is the engine coolant that motor is cooled off the heat that obtains afterwards, thereby the engine coolant of heat flows in the first heat exchanger by the first pipeline 5 and carries out heat exchange at this and aqueous solution of urea storage tank 1 aqueous solution of urea storage tank 1 is heated, and hot engine coolant also turns cold and flows back to motor by the second pipeline 6.Like this, just can prevent that the SCR system can't work after the urea cryocoagulation, cause motor vehicle exhaust emission to exceed standard.
Preferably, described valve 2 is solenoid valve 2.More preferably, described aqueous solution of urea storage tank 1 also comprises temperature transducer, and this temperature transducer is connected with described solenoid valve 2, thereby controls the switch of described solenoid valve 2 according to the temperature of urea water liquation storage tank 1.
Because aqueous solution of urea just can solidify being lower than under the condition of uniform temperature, therefore only in the situation that aqueous solution of urea storage tank 1 is lower than uniform temperature just need to heat it.Preferably adopt the ECU unit of automobile by temperature transducer the temperature of aqueous solution of urea storage tank 1 to be monitored, because the conducting of solenoid valve 2 and cut-off are controlled by electrical signal, so by at the first pipeline 5 solenoid valve 2 being set, conducting and the cut-off of described the first pipeline 5 just can be controlled according to the temperature of aqueous solution of urea storage tank 1 in the ECU unit of vehicle.
Preferably, described solenoid valve 2 conductings when the temperature of described aqueous solution of urea storage tank 1 is lower than-11 ℃, engine coolant flows into described the first heat exchanger.
Preferably, described solenoid valve 2 cut-offs when the temperature of described aqueous solution of urea storage tank 1 is higher than 90 ℃, engine coolant stops to flow into described the first heat exchanger.
Setting by vehicle ECU unit, under the condition of cold snap, solenoid valve 2 conductings when the temperature of aqueous solution of urea storage tank 1 is lower than predetermined minimum temperature-11 ℃, the engine coolant of heat begins it is heated, solenoid valve 2 cut-offs when the temperature of aqueous solution of urea storage tank 1 is higher than 90 ℃ of predetermined maximum temperatures, thereby no longer to 1 heating of aqueous solution of urea storage tank, avoid overheated.So just can guarantee that the SCR system works in certain safety temperature scope.
Preferably, described vehicle also comprises urea supply device 3 and urea-spray device 4 with the SCR system, and described aqueous solution of urea storage tank 1 links to each other with urea-spray device 4 by urea supply device 3.
Aqueous solution of urea storage tank 1 just is used for storing the container that the SCR system is used as the urea of reducing agent, when vehicle exhaust is reduced, need to utilize urea supply device 3 that the aqueous solution of urea in the aqueous solution of urea storage tank 1 is transported in the urea-spray device 4, by urea-spray device 4 aqueous solution of urea is ejected in the reaction device again and react with vehicle exhaust.
Preferably, described urea-spray device 4 has the second heat exchanger, and engine coolant can flow into described the second heat exchanger from motor by the 3rd pipeline 7, and flows back into described motor by the 4th pipeline 8 from described the second heat exchanger.
Because urea-spray device 4 is constantly worked, therefore can produce a large amount of heats in the process of Vehicle Driving Cycle.Affect vent gas treatment effect or cause danger for the excess Temperature that prevents urea-spray device 4, engine coolant can also be introduced in the second heat exchanger of described urea-spray device by the 3rd pipeline 7, thereby be made the cooling of urea-spray device.Need to prove, here the engine coolant of introducing described the second heat exchanger can be the engine coolant of heat, because the length of the 3rd pipeline 7 from motor to the urea-spray device is longer, therefore when arriving the urea-spray device, the engine coolant of heat turned cold, the engine coolant that turns cold carries out afterwards heating of heat exchange at urea-spray device place, engine coolant after the heating turns cold again when flowing back to motor by the 4th equally long pipeline 8, thereby cold engine coolant flows back to motor.
Preferably, described the first heat exchanger is the spiral helicine pipe that is bent into that is arranged within the described aqueous solution of urea storage tank 1.The form of any suitable heat exchanger of the prior art can be with in the present invention, for example arrange around aqueous solution of urea storage tank 1, perhaps directly be set to the outer wall of aqueous solution of urea storage tank 1 etc., but the present invention preferably uses and is bent into spiral helicine pipe as the way of realization of heat exchanger, this tubular heat exchange is inserted among the aqueous solution of urea storage tank 1, thus the area of contact of increase and aqueous solution of urea.
Below describe by reference to the accompanying drawings preferred implementation of the present invention in detail; but; the present invention is not limited to the detail in the above-mentioned mode of execution; in technical conceive scope of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove in addition, each concrete technical characteristics described in above-mentioned embodiment in reconcilable situation, can make up by any suitable mode, for fear of unnecessary repetition, the present invention is to the no longer separately explanation of various possible compound modes.
In addition, also can carry out combination in any between the various mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (8)
1. vehicle SCR system, this vehicle comprises aqueous solution of urea storage tank (1) with the SCR system, it is characterized in that, described aqueous solution of urea storage tank (1) has the first heat exchanger, engine coolant flows into described the first heat exchanger by the first pipeline (5) with valve (2) from motor, and flows back into described motor by the second pipeline (6) from described the first heat exchanger.
2. vehicle according to claim 1 SCR system is characterized in that, described valve (2) is solenoid valve (2).
3. vehicle according to claim 2 SCR system, it is characterized in that, described aqueous solution of urea storage tank (1) also comprises temperature transducer, this temperature transducer is connected with described solenoid valve (2), thereby controls the switch of described solenoid valve (2) according to the temperature of urea water liquation storage tank (1).
4. vehicle according to claim 3 SCR system is characterized in that, described solenoid valve (2) the conducting when temperature of described aqueous solution of urea storage tank (1) is lower than-11 ℃, and engine coolant flows into described heat exchanger.
5. vehicle according to claim 3 SCR system is characterized in that, described solenoid valve (2) the cut-off when temperature of described aqueous solution of urea storage tank (1) is higher than 90 ℃, and engine coolant stops to flow into described heat exchanger.
6. vehicle according to claim 1 SCR system, it is characterized in that, described vehicle also comprises urea supply device (3) and urea-spray device (4) with the SCR system, and described aqueous solution of urea storage tank (1) links to each other with urea-spray device (4) by urea supply device (3).
7. vehicle according to claim 6 SCR system, it is characterized in that, described urea-spray device (4) has the second heat exchanger, engine coolant can flow into described the second heat exchanger from motor by the 3rd pipeline (7), and flows back into described motor by the 4th pipeline (8) from described the second heat exchanger.
8. vehicle according to claim 1 SCR system is characterized in that, described the first heat exchanger is for being arranged on the spiral helicine pipe that is bent within the described aqueous solution of urea storage tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101755096A CN102852602A (en) | 2011-06-27 | 2011-06-27 | SCR (selective catalytic reduction) system for vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101755096A CN102852602A (en) | 2011-06-27 | 2011-06-27 | SCR (selective catalytic reduction) system for vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102852602A true CN102852602A (en) | 2013-01-02 |
Family
ID=47399520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101755096A Pending CN102852602A (en) | 2011-06-27 | 2011-06-27 | SCR (selective catalytic reduction) system for vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102852602A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156182A (en) * | 2015-09-17 | 2015-12-16 | 苏州亿利亚科汽车***有限公司 | Selective catalytic reduction (SCR) injection system and method |
| CN105626203A (en) * | 2016-01-25 | 2016-06-01 | 三一重机有限公司 | Selective catalytic reduction (SCR) urea heating/cooling system and method |
| US9488368B2 (en) | 2013-08-01 | 2016-11-08 | Ssi Technologies, Inc. | Defrosting a sensor in a vehicle system |
| CN106640296A (en) * | 2015-10-30 | 2017-05-10 | 北汽福田汽车股份有限公司 | Heat exchange assembly of SCR system and vehicle |
| CN108119208A (en) * | 2016-11-30 | 2018-06-05 | 上海汽车集团股份有限公司 | Treatment system for tail gas of automobile |
| US10487708B2 (en) | 2016-02-10 | 2019-11-26 | Ford Global Technologies, Llc | Reductant tank as a heat storage device |
| CN111221327A (en) * | 2020-03-17 | 2020-06-02 | 北京北汽德奔汽车技术中心有限公司 | Vehicle fault detection method and device, storage medium and vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1853035A (en) * | 2003-09-05 | 2006-10-25 | 日产柴油机车工业株式会社 | Exhaust gas purification device of engine |
| EP1767417B1 (en) * | 2005-09-26 | 2009-10-28 | DBK David + Baader GmbH | Tank system with a main tank and a melting device with a melt tank |
| CN101737133A (en) * | 2010-01-22 | 2010-06-16 | 中国汽车技术研究中心 | Device and method for spraying aqueous solution of urea having functions of cooling and anti-clogging |
| US20110030350A1 (en) * | 2009-08-05 | 2011-02-10 | Kabushiki Kaisha Toyota Jidoshokki | Exhaust gas purifying apparatus |
-
2011
- 2011-06-27 CN CN2011101755096A patent/CN102852602A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1853035A (en) * | 2003-09-05 | 2006-10-25 | 日产柴油机车工业株式会社 | Exhaust gas purification device of engine |
| EP1767417B1 (en) * | 2005-09-26 | 2009-10-28 | DBK David + Baader GmbH | Tank system with a main tank and a melting device with a melt tank |
| US20110030350A1 (en) * | 2009-08-05 | 2011-02-10 | Kabushiki Kaisha Toyota Jidoshokki | Exhaust gas purifying apparatus |
| CN101737133A (en) * | 2010-01-22 | 2010-06-16 | 中国汽车技术研究中心 | Device and method for spraying aqueous solution of urea having functions of cooling and anti-clogging |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9488368B2 (en) | 2013-08-01 | 2016-11-08 | Ssi Technologies, Inc. | Defrosting a sensor in a vehicle system |
| CN105156182A (en) * | 2015-09-17 | 2015-12-16 | 苏州亿利亚科汽车***有限公司 | Selective catalytic reduction (SCR) injection system and method |
| CN106640296A (en) * | 2015-10-30 | 2017-05-10 | 北汽福田汽车股份有限公司 | Heat exchange assembly of SCR system and vehicle |
| CN106640296B (en) * | 2015-10-30 | 2019-10-22 | 北汽福田汽车股份有限公司 | The heat-exchanging component and vehicle of SCR system |
| CN105626203A (en) * | 2016-01-25 | 2016-06-01 | 三一重机有限公司 | Selective catalytic reduction (SCR) urea heating/cooling system and method |
| US10487708B2 (en) | 2016-02-10 | 2019-11-26 | Ford Global Technologies, Llc | Reductant tank as a heat storage device |
| CN108119208A (en) * | 2016-11-30 | 2018-06-05 | 上海汽车集团股份有限公司 | Treatment system for tail gas of automobile |
| CN108119208B (en) * | 2016-11-30 | 2020-09-29 | 上海汽车集团股份有限公司 | Vehicle tail gas treatment system |
| CN111221327A (en) * | 2020-03-17 | 2020-06-02 | 北京北汽德奔汽车技术中心有限公司 | Vehicle fault detection method and device, storage medium and vehicle |
| CN111221327B (en) * | 2020-03-17 | 2021-04-20 | 北京汽车股份有限公司 | Vehicle fault detection method and device, storage medium and vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102852602A (en) | SCR (selective catalytic reduction) system for vehicles | |
| KR102309229B1 (en) | Combustion engine | |
| JP4656039B2 (en) | Engine exhaust purification system | |
| JP4888480B2 (en) | Control device for exhaust purification system | |
| CN203175653U (en) | Liquid-state reducing agent injection system | |
| JP3686670B1 (en) | Exhaust purification device | |
| JP4404775B2 (en) | Method and apparatus for aftertreatment of exhaust gas from an internal combustion engine | |
| EP2443327B1 (en) | Apparatus and method for reductant line heating control | |
| US7966811B2 (en) | Exhaust treatment system having a diverter valve | |
| CN104105853B (en) | Reducing agent supply unit with the SCR freezing commensurate structure | |
| JP4706627B2 (en) | Engine exhaust purification system | |
| US20130269321A1 (en) | Exhaust purification system and method for controlling exhaust purification system | |
| JP2008267682A (en) | Fluid heating device and exhaust gas post-treatment device equipped with same | |
| US20130000729A1 (en) | Def pump and tank thawing system and method | |
| JP2009168013A (en) | Heating system for chemical used in exhaust purification system | |
| RU2012146399A (en) | METHOD OF OPERATION OF THE DEVICE FOR CLEANING WASTE GAS | |
| JP2010065581A (en) | Exhaust emission control system of internal combustion engine | |
| EP3184770B1 (en) | Dosing module | |
| WO2014189454A1 (en) | Method for distributing and storing urea upstream a catalytic device in an exhaust treatment system | |
| JP2016217301A (en) | Ammonia generator and ammonia generation control device | |
| GB2533099A (en) | Method for providing heating to a diesel exhaust fluid (DEF) tank and diesel exhaust fluid (DEF) tank | |
| US9650932B2 (en) | Insulated reductant tank | |
| CN201835896U (en) | Urea liquid level sensor | |
| JP2015502490A (en) | Exhaust treatment device having exhaust gas treatment agent injection unit | |
| EP3650663B1 (en) | An aftertreatment system for a vehicle |
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: 20130102 |