CN102758672A - SCR (silicon controlled rectifier) pump nozzle device - Google Patents

SCR (silicon controlled rectifier) pump nozzle device Download PDF

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Publication number
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
Authority
CN
China
Prior art keywords
urea liquid
scr
pump
urea
nozzle
Prior art date
Application number
CN2011101092609A
Other languages
Chinese (zh)
Inventor
张幽彤
林伟
李铁栓
刘晓红
雍占琦
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北京理工大学
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Application filed by 北京理工大学 filed Critical 北京理工大学
Priority to CN2011101092609A priority Critical patent/CN102758672A/en
Publication of CN102758672A publication Critical patent/CN102758672A/en

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/40Engine management systems

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

SCR pump spray nozzle device
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.
CN2011101092609A 2011-04-29 2011-04-29 SCR (silicon controlled rectifier) pump nozzle device CN102758672A (en)

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Application Number Priority Date Filing Date Title
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Cited By (16)

* Cited by examiner, † Cited by third party
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
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
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
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
CN107269358A (en) * 2016-04-04 2017-10-20 劳士领汽车集团 SCR equipment with valve configuration component
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
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
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
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
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

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CN101268260A (en) * 2005-09-20 2008-09-17 埃姆肯技术德国(奥格斯堡)有限责任公司 Injection nozzle having heating element and heat accumulator, and method for introducing an oxidizable fluid into an exhaust system upstream of a catalytic converter or filter
CN101779012A (en) * 2007-08-09 2010-07-14 卡特彼勒公司 Reducing agent injector with purge heater
US20100313553A1 (en) * 2009-06-11 2010-12-16 Stanadyne Corporation Integrated pump and injector for exhaust after treatment
WO2011029774A1 (en) * 2009-09-11 2011-03-17 Emitec Gesellschaft Für Emissionstechnologie Mbh Feeding device for a reducing agent

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Publication number Priority date Publication date Assignee Title
CN101268260A (en) * 2005-09-20 2008-09-17 埃姆肯技术德国(奥格斯堡)有限责任公司 Injection nozzle having heating element and heat accumulator, and method for introducing an oxidizable fluid into an exhaust system upstream of a catalytic converter or filter
CN101779012A (en) * 2007-08-09 2010-07-14 卡特彼勒公司 Reducing agent injector with purge heater
US20100313553A1 (en) * 2009-06-11 2010-12-16 Stanadyne Corporation Integrated pump and injector for exhaust after treatment
WO2011029774A1 (en) * 2009-09-11 2011-03-17 Emitec Gesellschaft Für Emissionstechnologie Mbh Feeding device for a reducing agent

Cited By (20)

* Cited by examiner, † Cited by third party
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
CN107269358A (en) * 2016-04-04 2017-10-20 劳士领汽车集团 SCR equipment with valve configuration component
CN107269358B (en) * 2016-04-04 2020-11-13 劳士领汽车集团 SCR device with a valve arrangement
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
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
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
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
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
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
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
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
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

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Application publication date: 20121031