CN102758672A - SCR (silicon controlled rectifier) pump nozzle device - Google Patents
SCR (silicon controlled rectifier) pump nozzle device Download PDFInfo
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- CN102758672A CN102758672A CN2011101092609A CN201110109260A CN102758672A CN 102758672 A CN102758672 A CN 102758672A CN 2011101092609 A CN2011101092609 A CN 2011101092609A CN 201110109260 A CN201110109260 A CN 201110109260A CN 102758672 A CN102758672 A CN 102758672A
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- urea liquid
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- urea
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- nozzle device
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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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- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to an SCR (silicon controlled rectifier) pump nozzle device. Urea injection pressure is controlled by driving a urea solution pressure metering pump to accurately measure urea injection quantity, and urea solution inside the pump nozzle device is subjected to real-time temperature management by driving an electric heating unit to prevent freezing and crystallization of the urea solution. The SCR pump nozzle device has the advantages of high measuring accuracy, good urea solution atomization effect, compact structure, low cost and convenience in mounting and is a core component of an SCR system.
Description
Technical field
The present invention relates to the engine exhaust after-treatment device, belong to technical field of automotive electronics, promptly used the SCR pump spray nozzle device of electronic control and spraying technique.
Background technique
Diesel engine receives people's favor with its superior power character, Economy and emission performance, and its application area also more and more widely.At present, American-European countries's 100% heavy goods vehicles, 90% Light-duty Vehicle adopt diesel engine.The european diesel car has accounted for car and has produced about 32% of total amount per year, and wherein states such as France, Spain are especially up to more than 50%.But along with the earth environment problem becomes serious day by day, national governments have fallen over each other to issue that relevant laws and regulations come the exhaust emissions of restricting vehicle.Along with the continuous upgrading of rules, emission request is also harsh day by day.Three to Ou Si these stage subject matters are how to solve Diesel NOx discharging and PM discharging from Europe.The way of main flow has two at present: EGR+DPF; High-pressure common rail+SCR.Latter's fuel economy is superior to the former, does not also have so responsive relatively to fuel qualities.Therefore, the SCR technology has received more widely and having paid close attention to.Wherein urea selective catalytic reduction (urea-SCR) technology is to be considered to the most promising Diesel NOx emission control measure so far, and this technology also is the focus and emphasis of present relevant enterprise in the industry, colleges and universities and the research of other scientific research institutions simultaneously.
The accurate measurement of urea liquid and injection are the cores of urea selective catalytic reduction (urea-SCR) technology.Company of German Bosch, Denmark Grandfos company have all developed the SCR urea solution metering module of excellent performance at present, and the domestic achievement in research of still not having maturation in this field.
Summary of the invention
The objective of the invention is to fill up the blank of domestic SCR urea solution metering spraying technique, the development technological for domestic SCR provides core technology.
The present invention drives urea liquid pressure measurement pump through electronic control unit, and urea liquid is transported to the sick relevant position that is atomized spray to outlet pipe in the nozzle, remains pump nozzle interior urea liquid in this course more than a certain reasonable temperature.The present invention can be divided into four parts: urea liquid pressure measurement pump, urea liquid nozzle, electronic temperature control unit and electronic control unit.
Urea liquid pressure measurement pump is driven through automatically controlled joint by the SCR ECU.Under the normal working, the metering pump coil electricity produces magnetic field.Metering piston is a permanent magnet, and the electromagnetic force of metered pump coil also moves downward.This moment, Returnning spring was compressed, and the inner urea liquid in urea solution metering chamber begins metering and boosts.Unnecessary urea flows out from reflux valve, and urea liquid to be sprayed gets into the urea liquid nozzle.When spraying end, metering pump coil electromagnetism power disappears, and metering piston moves upward under the elastic force of Returnning spring and resets, and urea liquid enters into urea measuring cavity inside through inlet one-way valve and waits for injection next time at this moment.In this working procedure, realize the accurate measurement of urea liquid with the sealing of the straight line motion of metering piston and measuring cavity.
The inner urea liquid pressure regulator valve that is equipped with of urea liquid nozzle.Have only when urea liquid pressure reaches requirement, urea liquid could spray from nozzle.Different according to the motor that mated, this pressure regulator valve also need carry out different adjustment, to adapt under the different flow nozzle to the raising of urea liquid spray characteristics.
Electronic temperature control unit is used for the temperature of this pump nozzle interior urea liquid of real-time monitoring.Cross when low when the detected temperature of temperature transducer, the SCR ECU drives automatically controlled temperature controlling device through automatically controlled joint the entire pump spray nozzle device is heated.When the detected temperature of temperature transducer reached normal level, heating stopped.
Electronic control unit is the control core of this pump spray nozzle device.This unit internal application embedded scm technology, not only be used to control this pump spray nozzle device, also be used for communicating and obtain the relevant letter of engine operating condition, calculating real-time urea solution jet amount, urea-spray pressure and other parameters with Engine ECU.
Description of drawings
Fig. 1 is the structure diagram of SCR pump spray nozzle device of the present invention;
Among the figure: 1-urea liquid pressure measurement pump; 2-urea liquid nozzle; The 3-temperature transducer; The automatically controlled joint of 4-; The 5-electronic temperature control unit; The 6-electronic control unit; 7-metering pump coil; The 8-metering piston; The 9-Returnning spring; The 10-measuring cavity; The 11-inlet one-way valve; The 12-reflux valve; The 13-pressure regulator valve.
Embodiment
The present invention's (SCR pump spray nozzle device) structure is as shown in Figure 1.
The present invention is that basic principle is passed through electronic control unit driving urea liquid pressure measurement pump; Urea liquid is transported to the sick relevant position that is atomized spray to outlet pipe in the nozzle, remains pump nozzle interior urea liquid in this course more than a certain reasonable temperature.
Urea liquid pressure measurement pump is realized through the basic principle of electromagnetic pump.Under the normal working, metering pump coil logical (7) electricity produces magnetic field.Metering piston (8) is a permanent magnet, and the electromagnetic force of metered pump coil (7) also moves downward.Returnning spring this moment (9) is compressed, and urea solution metering chamber (10) inner urea liquid begins metering and boosts.Unnecessary urea flows out from reflux valve (12), and urea liquid to be sprayed gets into urea liquid nozzle (2).When spraying end, metering pump coil (7) electromagnetic force disappears, and metering piston (8) moves upward under the elastic force of Returnning spring and resets, and urea liquid enters into urea measuring cavity (10) inside through inlet one-way valve (11) and waits for injection next time at this moment.In this working procedure, realize the accurate measurement of urea liquid with the sealing of the straight line motion of metering piston (8) and measuring cavity (10).
The inner urea liquid pressure regulator valve (13) that is equipped with of urea liquid nozzle (2).Have only when urea liquid pressure reaches requirement, urea liquid could spray from nozzle (2).Different according to the motor that mated, this pressure regulator valve also need carry out different adjustment, to adapt under the different flow nozzle to the raising of urea liquid spray characteristics.
Electronic temperature control unit is used for the temperature of this pump nozzle interior urea liquid of real-time monitoring.Cross when low when the detected temperature of temperature transducer (3), electronic control unit (6) heats the entire pump spray nozzle device through automatically controlled joint (4) driving electronic temperature control unit (5), and mode of heating can be resistance or electromagnetic type.
Electronic control unit (6) hardware circuit mainly comprises: main control chip; Power module; The electromagnetic pump driver module; The signal input/output module; Communication module.Main control chip can be selected 8 perhaps single-chip microcomputers of 16; Power module is changed vehicle-mounted 12V or 24V power supply; The electromagnetic pump driver module provides suitable current to metering pump coil (7), bears the task of driving electromagnetic pump; It is subsequent use that the signal input/output module carries out importing single-chip microcomputer after filtering, amplification etc. are handled with the sensor signal that collects, simultaneously to the necessary signal of external world's output; Communication module can be used the mode of CAN bus communication, realizes the exchange of this pump nozzle information and external information, like engine speed, fuel injection quantity, urea-spray amount, electromagnetic pump driver frequency etc.
This SCR pump spray nozzle device is the basis of urea solution metering and injection in the SCR system, adopts after the advanced demarcation match test, and its good effect of competence exertion of the present invention realizes the transition of state's four motors to state's five emission standards.
Claims (6)
1. SCR pump spray nozzle device; Comprise urea liquid pressure measurement pump (1), urea liquid nozzle (2), urea liquid temperature transducer (3), automatically controlled joint (4), electronic temperature control unit (5), electronic control unit (6) and metering pump coil (7); To pressurize and injection is integrated in one, the pressurization that realizes urea liquid with accurately spray.
2. like right 1 described SCR pump spray nozzle device; It is characterized in that urea liquid gets into the urea liquid pressure measurement pump (1) from the A mouth; Through metering and supercharging; Enter into urea liquid nozzle (2), finally be the relevant position of atomized spray to outlet pipe from the C mouth, unnecessary urea liquid then refluxes from B.
3. like right 1 described SCR pump spray nozzle device, it is characterized in that under the normal working that the SCR ECU drives urea liquid pressure measurement pump (1) through automatically controlled joint (4).Metering pump coil (7) energising produces magnetic field.Metering piston (8) is a permanent magnet, and the electromagnetic force of metered pump coil (7) also moves downward.Returnning spring this moment (9) is compressed, and the inner urea liquid of urea measuring cavity (10) begins metering and boosts.Unnecessary urea flows out from reflux valve (12), and urea liquid to be sprayed gets into urea liquid nozzle (2).When spraying end, metering pump coil (7) electromagnetic force disappears, and metering piston (8) moves upward under the elastic force of Returnning spring (9) and resets, and urea liquid enters into urea measuring cavity (10) inside through inlet one-way valve (11) and waits for injection next time at this moment.
4. like right 1 described SCR pump spray nozzle device, it is characterized in that the inner urea liquid pressure regulator valve (13) that is equipped with of urea liquid nozzle (2).Have only when urea liquid pressure reaches requirement, urea liquid could spray from nozzle.
5. like right 1 described SCR pump spray nozzle device, (5) comprise external insulation thermal insulation layer and inner zone of heating to it is characterized in that having electronic temperature control unit.
6. like right 1 described SCR pump spray nozzle device, it is characterized in that crossing when low when the detected temperature of temperature transducer (3), the SCR ECU heats the entire pump spray nozzle device through automatically controlled joint (4) driving electronic temperature control unit (5).When the detected temperature of temperature transducer (3) reached normal level, heating stopped.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101092609A CN102758672A (en) | 2011-04-29 | 2011-04-29 | SCR (silicon controlled rectifier) pump nozzle device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101092609A CN102758672A (en) | 2011-04-29 | 2011-04-29 | SCR (silicon controlled rectifier) pump nozzle device |
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| CN102758672A true CN102758672A (en) | 2012-10-31 |
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| CN2011101092609A Pending CN102758672A (en) | 2011-04-29 | 2011-04-29 | SCR (silicon controlled rectifier) pump nozzle device |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953787A (en) * | 2012-11-28 | 2013-03-06 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Dual-pump type reducer jetting and supplying device |
| CN105986860A (en) * | 2015-01-30 | 2016-10-05 | 天纳克（苏州）排放系统有限公司 | Metering pump nozzle and engine exhaust post-treatment system with same |
| CN105986862A (en) * | 2015-02-10 | 2016-10-05 | 安徽艾可蓝节能环保科技有限公司 | Integrated measuring and injecting system for engine tail gas pipe |
| CN106555646A (en) * | 2016-11-16 | 2017-04-05 | 中国北方发动机研究所(天津) | A kind of metering atomising spraying system of SCR |
| CN106837484A (en) * | 2015-12-04 | 2017-06-13 | 天纳克（苏州）排放系统有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
| CN106837486A (en) * | 2016-12-27 | 2017-06-13 | 潍柴动力空气净化科技有限公司 | Gas helps formula urea injection system and gas to help formula method for urea injection control |
| CN107269358A (en) * | 2016-04-04 | 2017-10-20 | 劳士领汽车集团 | SCR equipment with valve configuration component |
| CN107461244A (en) * | 2016-06-06 | 2017-12-12 | 天纳克（苏州）排放系统有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
| WO2017211118A1 (en) * | 2016-06-06 | 2017-12-14 | 天纳克（苏州）排放系统有限公司 | Integrated apparatus, exhaust gas post-processing system, and control method |
| WO2017211120A1 (en) * | 2016-06-06 | 2017-12-14 | 天纳克（苏州）排放系统有限公司 | Integrated device, exhaust-gas aftertreatment system, and control method |
| WO2017211117A1 (en) * | 2016-06-06 | 2017-12-14 | 天纳克（苏州）排放系统有限公司 | Integrated apparatus, exhaust gas post-processing system, and control method |
| WO2017211233A1 (en) * | 2016-06-06 | 2017-12-14 | 天纳克（苏州）排放系统有限公司 | Integrated apparatus, exhaust gas post-processing system, and control method |
| CN107725240A (en) * | 2017-11-21 | 2018-02-23 | 聊城科瑞汽车零部件有限公司 | A kind of fuel injector of internal pressurization |
| WO2018171215A1 (en) * | 2017-03-20 | 2018-09-27 | 天纳克（苏州）排放系统有限公司 | Integrated device, exhaust gas after-treatment system, and control method |
| WO2018171219A1 (en) * | 2017-03-20 | 2018-09-27 | 天纳克（苏州）排放系统有限公司 | Integration device, exhaust gas after-treatment system and control method |
| WO2018171218A1 (en) * | 2017-03-20 | 2018-09-27 | 天纳克（苏州）排放系统有限公司 | Integrated device, exhaust gas after-treatment system, and control method |
| WO2018171216A1 (en) * | 2017-03-20 | 2018-09-27 | 天纳克（苏州）排放系统有限公司 | Integrated device, exhaust gas after-treatment system, and control method |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953787A (en) * | 2012-11-28 | 2013-03-06 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Dual-pump type reducer jetting and supplying device |
| CN105986860A (en) * | 2015-01-30 | 2016-10-05 | 天纳克（苏州）排放系统有限公司 | Metering pump nozzle and engine exhaust post-treatment system with same |
| CN105986860B (en) * | 2015-01-30 | 2019-07-23 | 天纳克（苏州）排放系统有限公司 | Metering pump mouth and its engine exhaust aftertreatment system |
| CN105986862A (en) * | 2015-02-10 | 2016-10-05 | 安徽艾可蓝节能环保科技有限公司 | Integrated measuring and injecting system for engine tail gas pipe |
| CN106837484A (en) * | 2015-12-04 | 2017-06-13 | 天纳克（苏州）排放系统有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
| CN107269358B (en) * | 2016-04-04 | 2020-11-13 | 劳士领汽车集团 | SCR device with a valve arrangement |
| CN107269358A (en) * | 2016-04-04 | 2017-10-20 | 劳士领汽车集团 | SCR equipment with valve configuration component |
| WO2017211233A1 (en) * | 2016-06-06 | 2017-12-14 | 天纳克（苏州）排放系统有限公司 | Integrated apparatus, exhaust gas post-processing system, and control method |
| WO2017211118A1 (en) * | 2016-06-06 | 2017-12-14 | 天纳克（苏州）排放系统有限公司 | Integrated apparatus, exhaust gas post-processing system, and control method |
| WO2017211120A1 (en) * | 2016-06-06 | 2017-12-14 | 天纳克（苏州）排放系统有限公司 | Integrated device, exhaust-gas aftertreatment system, and control method |
| WO2017211117A1 (en) * | 2016-06-06 | 2017-12-14 | 天纳克（苏州）排放系统有限公司 | Integrated apparatus, exhaust gas post-processing system, and control method |
| WO2017211119A1 (en) * | 2016-06-06 | 2017-12-14 | 天纳克（苏州）排放系统有限公司 | Integrated apparatus, exhaust gas post-processing system, and control method |
| CN107461244A (en) * | 2016-06-06 | 2017-12-12 | 天纳克（苏州）排放系统有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
| CN107461244B (en) * | 2016-06-06 | 2023-06-09 | 天纳克（苏州）排放系统有限公司 | Integrated device, exhaust gas aftertreatment system and control method |
| CN106555646B (en) * | 2016-11-16 | 2018-08-10 | 中国北方发动机研究所(天津) | A kind of metering atomising spraying systems of SCR |
| CN106555646A (en) * | 2016-11-16 | 2017-04-05 | 中国北方发动机研究所(天津) | A kind of metering atomising spraying system of SCR |
| CN106837486A (en) * | 2016-12-27 | 2017-06-13 | 潍柴动力空气净化科技有限公司 | Gas helps formula urea injection system and gas to help formula method for urea injection control |
| WO2018171218A1 (en) * | 2017-03-20 | 2018-09-27 | 天纳克（苏州）排放系统有限公司 | Integrated device, exhaust gas after-treatment system, and control method |
| WO2018171216A1 (en) * | 2017-03-20 | 2018-09-27 | 天纳克（苏州）排放系统有限公司 | Integrated device, exhaust gas after-treatment system, and control method |
| CN108625944A (en) * | 2017-03-20 | 2018-10-09 | 天纳克（苏州）排放系统有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
| WO2018171219A1 (en) * | 2017-03-20 | 2018-09-27 | 天纳克（苏州）排放系统有限公司 | Integration device, exhaust gas after-treatment system and control method |
| WO2018171215A1 (en) * | 2017-03-20 | 2018-09-27 | 天纳克（苏州）排放系统有限公司 | Integrated device, exhaust gas after-treatment system, and control method |
| CN107725240B (en) * | 2017-11-21 | 2019-11-08 | 聊城科瑞汽车零部件有限公司 | A kind of fuel injector of internal pressurization |
| CN107725240A (en) * | 2017-11-21 | 2018-02-23 | 聊城科瑞汽车零部件有限公司 | A kind of fuel injector of internal pressurization |
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Application publication date: 20121031 |