CN103032135B - The built-in SCR reducing agent of urea pump stores and ejecting system - Google Patents
The built-in SCR reducing agent of urea pump stores and ejecting system Download PDFInfo
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- CN103032135B CN103032135B CN201110293985.8A CN201110293985A CN103032135B CN 103032135 B CN103032135 B CN 103032135B CN 201110293985 A CN201110293985 A CN 201110293985A CN 103032135 B CN103032135 B CN 103032135B
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- reducing agent
- urea pump
- urea
- metering valve
- built
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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
-
- 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)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Present invention is disclosed the built-in SCR reducing agent of a kind of urea pump to store and ejecting system, comprise the urea box of storage and reduction agent, urea pump, metering valve and heating unit, described metering valve and described urea pump pipeline connection, described urea pump and heating unit are all arranged in described urea box; The present invention by by urea pump, heating unit is integrated is arranged in urea box, make storage and the ejecting system compact structure on the whole of reducing agent of the present invention, and heating unit also heats the reducing agent in reducing agent delivery line while heating the reducing agent in urea box, simplify system architecture, also reduce system cost.
Description
Technical field
The present invention relates to a kind of exhaust gas from diesel vehicle treatment and purification system, particularly relate to the built-in SCR reducing agent of a kind of urea pump and store and ejecting system.
Background technique
Existing known, selective catalytic reduction technology (SCR) is the main flow route of motor-vehicle tail-gas post-processing technology, by reducing agent (being called in industry " adding indigo plant ") in atomization quantitative injection air inlet-outlet pipe, and by SCR catalyst by the main harmful gas NO in waste gas
xchange into nitrogen and water discharge, reach the object of tail gas clean-up, this is also realize " state IV emission standard " the most general technology path.
In prior art, the structure of SCR system and control mode are in variation, as BOSCH company DENOX1 has gas system and DENOX2 without gas system, but be substantially all urea pump is arranged on urea box outside to realize the control to the metered injection of reducing agent, and each module such as urea box, urea pump, metering valve in such SCR system is all separate, not only to heat each module respectively when ambient temperature is lower like this, also can cause the difficult arrangement and leakage hidden danger etc. that cause because pipeline is more.
Summary of the invention
The object of the invention is to the defect overcoming prior art, provide that a kind of design is ingenious, level of integration is high, the built-in SCR reducing agent of lower-cost urea pump stores and ejecting system.
For achieving the above object, the present invention proposes following technological scheme: the built-in SCR reducing agent of a kind of urea pump stores and ejecting system, comprise the urea box of storage and reduction agent, urea pump, metering valve and heating unit, described metering valve and described urea pump pipeline connection, described urea pump and heating unit are all arranged in described urea box, and described heating unit heats the reducing agent in urea box.
Preferably, be also provided with pressure regulator valve in described urea box, the downstream that described pressure regulator valve is connected on described urea pump by pressure inlet tube is fed back with mineralization pressure.
Described heating unit comprises intake pipe and outlet pipe, and described intake pipe and outlet pipe extend in described urea box.
The built-in SCR reducing agent of described urea pump stores and also comprises measurement control unit (DCU) with ejecting system, and described measurement control unit signal connects described urea pump and metering valve.Described metering valve is directly installed on the outlet pipe in described SCR system.
The built-in SCR reducing agent of described urea pump stores and also comprises mixing chamber and nozzle with ejecting system, and described mixing chamber is connected on described metering valve downstream, and described nozzle is connected on the downstream of described mixing chamber.
The built-in SCR reducing agent of described urea pump stores and also comprises air source of the gas with ejecting system, and described air source of the gas is communicated with described mixing chamber, and the reducing agent that the air-flow in described air source of the gas and metering valve eject fully can mix in mixing chamber.
The built-in SCR reducing agent of described urea pump stores and also comprises filter with ejecting system, and described filter is arranged on the upstream of described metering valve.
Described system also comprises and is arranged at solenoid valve between described air source of the gas and mixing chamber and pressure maintaining valve.
Compared with prior art, the present invention is arranged in urea box by integrated to urea pump, heating unit and pressure regulator valve, not only overcome the technical barrier in implementation, and make storage and the ejecting system compact structure on the whole of reducing agent of the present invention, and heating unit also heats the reducing agent in reducing agent delivery line while heating the reducing agent in urea box, simplify system architecture, also reduce system cost.
Accompanying drawing explanation
Fig. 1 is that the built-in SCR reducing agent of urea pump of the present invention stores and ejecting system embodiment one schematic diagram.
Fig. 2 is that the built-in SCR reducing agent of urea pump of the present invention stores and ejecting system embodiment two schematic diagram.
Embodiment
Below in conjunction with accompanying drawing of the present invention, clear, complete description is carried out to the technological scheme in the preferred embodiment of the present invention.
The built-in SCR reducing agent of urea pump being illustrated in figure 1 the present invention first preferred embodiment stores and ejecting system, this system, for there being pneumatic control system, comprises urea box 1, urea pump 2, filter 12, sensor 14, metering valve 3, mixing chamber 9, air source of the gas 7, heating unit 4 and measurement control unit (DCU) 8; Described urea box 1 is for storage and reduction agent, and described urea pump 2 is arranged in described urea box 1, and to reduce back pressure, the discharge pressure maintaining reducing agent is stablized.Described heating unit 4 is also arranged in described urea box 1, to heat the reducing agent in reducing agent delivery line while the reducing agent in heating urea case 1, unit can be avoided like this to heat respectively, and urea pump embedding structure also can be avoided heating separately pump tubing length.Described filter 12, metering valve 3, mixing chamber 9 are connected by the pipeline of conveying reducing agent successively, for the filtration of reducing agent, metered injection and with the mixing of air stream.
Specifically, the upstream that described filter 12 is arranged on described metering valve (both can be arranged on outside urea box, also can be arranged in urea box), the reducing agent in described filter 12 pairs of delivery lines carries out filter cleaning, prevents dust impurity from entering in delivery line; Described sensor 14 to be arranged between filter 12 and metering valve 3 (i.e. the upstream of metering valve 3) for the force value of measuring valve 3 upstream.
Described air source of the gas 7 provides air stream for ejecting system of the present invention, during metered injection, the reducing agent that this air-flow and metering valve 3 eject can fully mix in mixing chamber 9, to improve atomization and the mixed effect of reducing agent, the reducing agent after metered injection is spurted in outlet pipe 15 by the nozzle 11 being located at mixing chamber 9 downstream.
Pressure regulator valve 5 is also provided with in described urea box 1, described pressure regulator valve 5 is arranged on the downstream of described urea pump 2, and be communicated with by pressure inlet tube 13 between described pressure regulator valve 5 with the pipeline in described metering valve 3 downstream, the pressure in such metering valve 3 downstream is consistent with the pressure initiation in pressure regulator valve 5 to be fed back, the pressure difference of metering valve 3 upstream and downstream can be stablized by pressure regulator valve 5, only need the pulsewidth of control dose injection apparatus (injection interval) to control emitted dose, reach the effect accurately controlled.
In the present embodiment, described pressure inlet tube 13 is communicated with pressure regulator valve 5 and mixing chamber 9, in the process of the metered injection of reducing agent, by the sensor pressure values that autoregulation and the measurement control unit 8 of pressure regulator valve 5 receive, the pressure reduction of metering valve 3 upstream and downstream is gone out by measurement control unit 8 controlling calculation, and control action and the injection of metering valve 3, reach the effect accurately controlled.
Preferably, be also provided with solenoid valve 16 and pressure maintaining valve 17 between described air source of the gas 7 and mixing chamber 9, described solenoid valve 16 controls the break-make of air-flow, described pressure maintaining valve 17 steady air flow pressure.
Described measurement control unit DCU8 signal connects described urea pump 2, metering valve 3, sensor 14 and solenoid valve 16, and measurement control unit 8 controls the metered injection of urea pump action and metering valve by Stress control, and can control the break-make of air-flow.
Described heating unit 4 comprises intake pipe 41 and outlet pipe 42, described intake pipe 41 and outlet pipe 42 extend in described urea box 1 from top to bottom, described intake pipe 41 is communicated with by heat exchanger in bottom with outlet pipe 42, can heat when engine thermal cooling liquid flows through intake pipe 41 and outlet pipe 42 to the reducing agent in urea box 1.
In the present embodiment, described filter 12, sensor 14, metering valve 3, mixing chamber 9 and air source of the gas 7 accessible site are on described urea box 1, pipeline between these parts can be heated while reducing agent in urea box 1 is heated, avoid heating separately to increase cost.
Preferably, described urea pump to be arranged in described heating system near heat exchanger, is convenient to reducing agent and aspirates after thawing.
Fig. 2 is that the built-in SCR reducing agent of urea pump of second embodiment of the invention stores and metering system, this system is without pneumatic control system, be with the difference of embodiment one, described metering valve 3 is directly installed on the outlet pipe 15 in described SCR system, described pressure inlet tube 13 is communicated with pressure regulator valve 5 and outlet pipe 15, without the need to using mixing chamber, air element and nozzle, by substantially identical metered injection effect also can be realized without pneumatic control.
Urea pump of the present invention built-in SCR reducing agent stores with ejecting system level of integration high, heating effect is good, highly integratedly save arrangement space, control accuracy is high, both can be used in pneumatic control system, also can be used in without in pneumatic control system, simultaneously, urea pump embedding structure can reduce back pressure, whole system pressure stability, improves the working life of urea pump.
Claims (6)
1. the built-in SCR reducing agent of urea pump stores and ejecting system, it is characterized in that: comprise the urea box of storage and reduction agent, urea pump, metering valve and heating unit, described metering valve and described urea pump pipeline connection, described urea pump and heating unit are all arranged in described urea box, described heating unit heats the reducing agent in described urea box, described system also comprises pressure regulator valve, sensor, filter and measurement control unit, described pressure regulator valve is positioned at described urea box, described pressure regulator valve is arranged on the downstream of described urea pump, and be communicated with by pressure inlet tube between described pressure regulator valve with the pipeline in described metering valve downstream, to make, the pressure in metering valve downstream is consistent with the pressure initiation in pressure regulator valve to be fed back, described filter is arranged on the upstream of described metering valve, described sensor setting is between filter and metering valve, described measurement control unit signal connects described urea pump and metering valve.
2. the built-in SCR reducing agent of urea pump according to claim 1 stores and ejecting system, and it is characterized in that: described heating unit comprises intake pipe and outlet pipe, described intake pipe and outlet pipe extend in described urea box.
3. the built-in SCR reducing agent of urea pump according to claim 1 and 2 stores and ejecting system, it is characterized in that: described metering valve is directly installed on the outlet pipe of SCR system.
4. the built-in SCR reducing agent of urea pump according to claim 1 and 2 stores and ejecting system, it is characterized in that: the built-in SCR reducing agent of described urea pump stores and also comprises mixing chamber and nozzle with ejecting system, described mixing chamber is connected on described metering valve downstream, described nozzle is connected on the downstream of described mixing chamber, and described sensor, metering valve and mixing chamber are integrated on described urea box.
5. the built-in SCR reducing agent of urea pump according to claim 4 stores and ejecting system, it is characterized in that: the built-in SCR reducing agent of described urea pump stores and also comprises air source of the gas with ejecting system, described air source of the gas is communicated with described mixing chamber, and the air-flow in described air source of the gas mixes in mixing chamber mutually with the reducing agent that metering valve ejects.
6. the built-in SCR reducing agent of urea pump according to claim 5 stores and ejecting system, it is characterized in that: also comprise and be arranged at solenoid valve between described air source of the gas and mixing chamber and pressure maintaining valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110293985.8A CN103032135B (en) | 2011-10-02 | 2011-10-02 | The built-in SCR reducing agent of urea pump stores and ejecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110293985.8A CN103032135B (en) | 2011-10-02 | 2011-10-02 | The built-in SCR reducing agent of urea pump stores and ejecting system |
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| Publication Number | Publication Date |
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| CN103032135A CN103032135A (en) | 2013-04-10 |
| CN103032135B true CN103032135B (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110293985.8A Expired - Fee Related CN103032135B (en) | 2011-10-02 | 2011-10-02 | The built-in SCR reducing agent of urea pump stores and ejecting system |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256104A (en) * | 2013-05-21 | 2013-08-21 | 中国第一汽车股份有限公司 | Pump nozzle urea direct injecting system |
| CN103266938A (en) * | 2013-05-21 | 2013-08-28 | 中国第一汽车股份有限公司 | Gas-assisted urea injection system with mixing tube heating method adopted |
| US9074343B2 (en) * | 2013-09-25 | 2015-07-07 | Komatsu Ltd. | Work vehicle |
| CN104632326B (en) * | 2013-11-08 | 2017-02-01 | 武汉芙源生环保技术有限公司 | Reactant metering and delivering device for internal combustion engine tail gas purification and aftertreatment system |
| CN104948271B (en) * | 2014-03-25 | 2017-12-08 | 浙江福爱电子有限公司 | A kind of SCR injection metering modules and control method |
| CN105986861A (en) * | 2015-02-10 | 2016-10-05 | 安徽艾可蓝节能环保科技有限公司 | SCR tail gas treatment system for engine |
| CN106593586B (en) * | 2016-11-29 | 2019-07-05 | 潍柴动力股份有限公司 | A kind of urea injection apparatus for engine SCR system |
| CN110295983B (en) * | 2018-03-23 | 2022-07-08 | 罗伯特·博世有限公司 | Purge alarm system and method for an exhaust gas treatment fluid reservoir of an SCR system |
| CN109381992A (en) * | 2018-11-12 | 2019-02-26 | 南京蔚岚环境技术研究院有限公司 | Urea pump control system, exhaust gas purification system and working method |
| CN118188116A (en) * | 2019-09-03 | 2024-06-14 | 武汉洛特福动力技术有限公司 | Urea injection system for diesel engine aftertreatment system |
| CN111911273B (en) * | 2020-08-20 | 2021-06-08 | 安徽江淮汽车集团股份有限公司 | Method and system for monitoring urea consumption of vehicle |
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| CN201292881Y (en) * | 2008-05-28 | 2009-08-19 | 中国第一汽车集团公司 | Vehicle-mounted SCR metering injection system using exhaust temperature as variable |
| EP2199556A2 (en) * | 2008-12-18 | 2010-06-23 | Delphi Technologies, Inc. | Urea storage system |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2065578A1 (en) * | 2007-11-28 | 2009-06-03 | International Engine Intellectual Property | Heating system for chemical used in exhaust purification system |
| US20100050606A1 (en) * | 2008-09-04 | 2010-03-04 | Fulks Gary C | Urea tank assembly |
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| CN201292881Y (en) * | 2008-05-28 | 2009-08-19 | 中国第一汽车集团公司 | Vehicle-mounted SCR metering injection system using exhaust temperature as variable |
| EP2199556A2 (en) * | 2008-12-18 | 2010-06-23 | Delphi Technologies, Inc. | Urea storage system |
| CN102022162A (en) * | 2010-12-15 | 2011-04-20 | 中国第一汽车集团公司 | Urea system with urea pump inside and filter outside urea box |
| CN102080588A (en) * | 2010-12-15 | 2011-06-01 | 中国第一汽车集团公司 | Urea filter-urea pump built-in urea system |
| CN202325772U (en) * | 2011-10-02 | 2012-07-11 | 苏州派格力减排系统有限公司 | SCR (Selective Catalytic Reduction) reductant storage and injection system provided with built-in urea pump |
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| CN103032135A (en) | 2013-04-10 |
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