WO2010059819A2 - Procédé de purge d'un système de dosage - Google Patents
Procédé de purge d'un système de dosage Download PDFInfo
- Publication number
- WO2010059819A2 WO2010059819A2 PCT/US2009/065141 US2009065141W WO2010059819A2 WO 2010059819 A2 WO2010059819 A2 WO 2010059819A2 US 2009065141 W US2009065141 W US 2009065141W WO 2010059819 A2 WO2010059819 A2 WO 2010059819A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reductant
- dispensing device
- passage
- purging
- pump
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1433—Pumps
- F01N2610/144—Control thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1493—Purging the reducing agent out of the conduits or nozzle
-
- 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
Definitions
- the present disclosure is directed to a urea dosing system and, more particularly, to a method for purging a urea dosing system.
- Urea dosing systems are typically used to reduce NO x emissions in large machines where space and weight considerations are not a concern, such as, for example, locomotives and engine-generators.
- Urea is a reductant that is typically mixed with water and stored in a tank that is located on the machine. As the machine operates and produces exhaust, the urea mixture is pumped from the tank into the exhaust system. The urea mixture may be mixed with air and sprayed into the exhaust system via a nozzle. The urea mixture may react with exhaust fumes at high temperatures, affecting a selective catalytic reduction (SCR) reaction that may reduce NO x emissions of the machine.
- SCR selective catalytic reduction
- a shortcoming of dosing systems relates to the relatively high ambient temperatures at which urea mixtures freeze, such as about -H 0 C (about 12° F).
- the urea mixture may freeze and expand within the dosing system, causing damage to intricate components such as injector nozzles. Additionally, when heated to intermediate temperatures between about 100° and 250° C, urea may decompose into a urea byproduct that may clog dosing components and/or an exhaust system.
- U.S. Patent Application Publication No. 2007/0180816 Al discloses an exhaust emission purifying apparatus for an engine.
- the '816 publication discloses a urea storage tank that is connected to an exhaust system via a passage. Urea is injected into the exhaust system via a nozzle located on the passage.
- the '816 publication also discloses a discharge-forcing device that forcibly discharges urea gas, which collects in an upper portion of the storage tank, to the exhaust system.
- the '816 publication may provide a method for discharging urea gas from the upper portion of a storage tank, it may fail to purge urea from a nozzle that sprays urea into an exhaust system and thereby fail to prevent damage from frozen urea.
- the system of the '816 publication may also fail to remove urea from dosing components and/or an exhaust system at temperatures between about 100° and 250° C, which may allow the urea to decompose into ammonia polymer and cause clogging.
- the present disclosure is directed to overcoming one or more of the shortcomings set forth above and/or other deficiencies in the existing technology.
- the present disclosure is directed toward a method for purging reductant from a reductant supply system.
- the method includes dispensing reductant into an exhaust system via a dispensing device.
- the method also includes purging the dispensing device by urging reductant from the dispensing device to a reductant source.
- the present disclosure is directed toward an emissions reduction system.
- the emissions reduction system includes a dispensing device configured to dispense reductant into an exhaust system.
- the emissions reduction system also includes a pressurized fluid source connected to the dispensing device and configured to urge the reductant from the dispensing device to a reductant source.
- Fig. 1 is a schematic illustration of an exemplary disclosed dosing system
- Fig. 2 is a second schematic illustration of the dosing system
- Fig. 3 is a third schematic illustration of the dosing system
- Fig. 4 is a schematic illustration of an exemplary disclosed dispensing device of the dosing system
- Fig. 5 is a cross section of an exemplary disclosed nozzle of the dispensing device of Fig. 4;
- Fig. 6 is a schematic illustration of an alternative embodiment of the dosing system.
- Fig. 7 is a flow chart for an exemplary disclosed dosing method.
- Dosing system 10 introduces a reductant into an exhaust system 12 of a machine to affect a chemical reaction that reduces NO x emissions.
- Dosing system 10 may inject a reductant such as, for example, a urea solution into exhaust system 12 of a machine engine system to help affect selective catalytic reduction (SCR).
- the reductant may be a urea solution that is mixed with water.
- the urea solution may react with NO x in exhaust system 12, thereby helping to reduce NO x emissions.
- Dosing system 10 may include exhaust system 12, a pumping system 15, a spraying system 20, and a purging system 25.
- Dosing system 10 may be located partially or wholly within a housing 27 such as, for example, a cabinet for holding dosing equipment.
- Exhaust system 12 may include an engine 13, an oxidation catalyst system 14, a mixer assembly 16, and an SCR assembly 17.
- Exhaust gas may be emitted from engine 13 and flow into oxidation catalyst system 14, where the exhaust gas may be initially treated. The exhaust gas may then flow to mixer assembly 16, where dosing system 10 may inject the reductant into the exhaust gas. The exhaust gas may then flow to SCR assembly 17, where SCR occurs.
- Pumping system 15 transfers reductant toward exhaust system 12.
- Pumping system 15 may include a dosing pump 30, a reductant source 35, and a -A-
- Pump 30 may generate fluid flow within a passage 42, which may be fluidly connected to reductant source 35 and filter 40.
- Pump 30 may be a metering pump such as, for example, a diaphragm pump. Pump 30 may be driven independently of the engine such as, for example, by an electric motor.
- Reductant source 35 may be a low pressure tank for storing a reductant solution such as, for example, a urea solution. Reductant source 35 may be remotely located from housing 27 and may include a heating source for thawing the reductant solution.
- Filter 40 may be any suitable filter or strainer for removing ice crystals and debris from a reductant solution such as, for example, a plastic filter. As pump 30 pumps the reductant solution from reductant source 35 toward exhaust system 12, via passage 42, a portion of the reductant solution may be frozen. The frozen portion may be collected upstream of pump 30 via filter 40.
- Spraying system 20 injects the reductant solution into exhaust system 12.
- Spraying system 20 may include a pressurized source 45, a pressure regulator 50, a control valve 55, a check valve 60, and a dispensing device 65.
- Pressurized source 45, pressure regulator 50, control valve 55, check valve 60, and dispensing device 65 may be fluidly connected via a passage 70.
- Pressurized source 45 may be remotely located from housing 27 and may include a pump and/or a pressurized container containing a pressurized gas such as, for example, air. Pressurized source 45 may pressurize air within passage 70 and may transfer the pressurized air toward dispensing device 65.
- Pressure regulator 50 may mechanically regulate an air pressure within passage 70. Pressure regulator 50 may maintain an appropriate upstream pressure near pressurized source 45 so that, after pressure losses, an appropriate pressure is maintained within dispensing device 65 for reductant injection.
- Control valve 55 may be any suitable valve such as, for example, a solenoid- actuated and spring-biased control valve that is movable between a first position and a second position. Control valve 55 may selectively allow flow through passage 70 in a first position and may selectively block flow through passage 70 in a second position.
- Check valve 60 may ensure a unidirectional flow in passage 70, from pressurized source 45 toward dispensing device 65.
- Check valve 60 may be any suitable valve such as, for example, a ball check valve.
- Dispensing device 65 introduces reductant into mixer assembly 16 of exhaust system 12. As illustrated in Fig. 4, dispensing device 65 may include a passage 75, a passage 80, and a nozzle 85. Passage 75 may be fluidly connected to passage 70 and may transfer pressurized air into nozzle 85. Passage 80 may be fluidly connected to passage 42 of pumping system 15 and may transfer reductant solution between passage 42 and nozzle 85.
- Nozzle 85 may be disposed within mixer assembly 16 of exhaust system 12 and injects reductant into exhaust system 12.
- nozzle 85 may include a passage 90 that may be fluidly connected to passage 75 and a passage 95 that may be fluidly connected to passage 80. Passage 90 and passage 95 may be fluidly connected via a chamber 100. Passage 90 may transfer pressurized air into chamber 100 and passage 95 may transfer pressurized reductant solution into chamber 100, so that the flow of pressurized air and pressurized reductant may be combined in chamber 100.
- Chamber 100 may include a plurality of passageways 105 that may be fluidly connected to exhaust system 12 via a plurality of orifices 110.
- Orifices 110 may have relatively small areas that may form a pressure differential in dispensing device 65 and may provide a pressure restriction to flow.
- the pressurized air and the pressurized reductant may mix in chamber 100.
- the pressure of the mixture may overcome the restriction to flow through orifices 110 and spray into mixer assembly 16 of exhaust system 12.
- Purging system 25 purges reductant from components of dosing system 10.
- Purging system 25 may include a sensor 115, a control valve 120, a control valve 125, a check valve 130, and a controller 135.
- Controller 135 may be any type of programmable logic controller known in the art for automating machine processes such as, for example, an engine control unit (ECU). Controller 135 may control an operation of pump 30 via an electrical line 137. Controller 135 may also be connected to other components of the machine such as, for example, the engine, an operator station, and the exhaust system. For example, controller 135 may be electrically connected to a temperature sensor disposed within exhaust system 12.
- Sensor 115 may be disposed within passage 70 and may be any suitable sensor for measuring an air pressure. Sensor 115 may be electrically connected to controller 135 via an electrical line 140 and may provide values indicative of an air pressure in passage 70 to controller 135 as input. When sensor 115 reports air pressure values that are unsuitable for an operation of dosing system 10, controller 135 may control, via an electrical line 145, control valve 55 to move from the first position to the second position, thereby blocking air flow through passage 70.
- Control valve 120 and check valve 130 may be fluidly connected via a passage 150 that may fluidly connect passage 70 and passage 42.
- Control valve 120 may be similar to control valve 55 and may selectively allow and block pressurized air flow through passage 150.
- Control valve 120 may be controlled by controller 135, via electrical line 155.
- Check valve 130 may be similar to check valve 60 and may ensure a unidirectional flow through passage 150, from pressurized source 45 toward an inlet of pump 30.
- Control valve 125 may be similar to control valves 55 and 120 and may selectively allow and block flow through a passage 160. Control valve 125 may be controlled by controller 135, via electrical line 165. Passage 160 may fluidly connect an outlet of pump 30 and reductant source 35. Passage 160 may be sized larger than passage 42, so as to require less pressure for generating flow.
- Fig. 6 illustrates dosing system 10 having an alternative purging system 225.
- Purging system 225 may be similar to purging system 25, but with the valves being alternatively disposed.
- Purging system 225 may include sensor 115 and controller 135, described above.
- Purging system 225 may also include a control valve 200 and a control valve 205.
- Control valve 200 may be similar to control valve 55 and may be controlled by controller 135, via an electrical line 210, to move between a first position and a second position. In the first position, control valve 200 may fluidly connect an outlet of pump 30 and dispensing device 65. In the second position (as illustrated in Fig. 6), control valve 200 may fluidly connect the outlet of pump 30 and reductant source 35, via a passage 215. It is also contemplated that control valves 200 and 205 may be integrated into a single valve.
- a passage 220 may be a bypass passage fluidly connecting the outlet of pump 30 to the inlet of pump 30.
- Control valve 205 may be similar to control valve 200 and may selectively allow and block flow through passage 220. Control valve 205 may be controlled by controller 135 via an electrical line 227.
- the disclosed dosing system may be used in any system that delivers fluid to an exhaust system to reduce exhaust emissions such as, for example, a locomotive or a generator.
- the disclosed dosing system may be used to affect selective catalytic reduction within any machine having an exhaust system.
- Fig. 7 provides a method for operating dosing system 10.
- Engine ignition occurs in step 300.
- pump 30 is primed.
- Controller 135 commands control valve 125 to move to a position allowing flow through passage 160.
- Pump 30 is primed by pressurizing reductant into passage 160.
- control valve 125 moves to a position blocking flow through passage 160.
- controller 135 commands control valve 55 to move to a position allowing a flow of pressurized air through passage 70. Control valve 55 may remain in this position for the remaining method steps.
- Dosing occurs in step 310. Dosing may occur when a temperature within exhaust system 12 exceeds a threshold temperature and selective catalytic reduction may be performed such as, for example, about 180° C and above.
- a temperature sensor disposed in the exhaust system signals controller 135.
- pump 30 pressurizes reductant in passage 42 and pumps the reductant toward dispensing device 65.
- Control valve 55 may be in a position allowing flow through passage 70, allowing pressurized source 45 to urge pressurized air toward dispensing device 65.
- Control valves 120 and 125 may be in positions blocking flow through passages 150 and 160, respectively.
- pressurized air and pressurized reductant enters dispensing device 65 via passages 75 and 80, respectively, and flows toward nozzle 85.
- pressurized air and pressurized reductant flow via passages 90 and 95, respectively, and mix in chamber 100.
- the pressure of the air and reductant within chamber 100 may exceed the pressure restriction of orifices 110, causing the mixture of reductant and air to spray into exhaust system 12 via orifices 110.
- step 315 Purging of reductant from dispensing device 65 and pump 30 occurs in step 315. Dosing may be stopped and purging may begin when a temperature within exhaust system 12, reported to controller 135 via the temperature sensor, falls below a threshold temperature such as, for example, between about 180° C and about 250° C. For example, the threshold temperature may be about 180° C.
- a threshold temperature such as, for example, between about 180° C and about 250° C.
- the threshold temperature may be about 180° C.
- controller 135 may prevent the engine from being turned off until the purging process is complete. Alternatively, the engine may be fully shut down, and thereafter the purging of step 315 may be initiated.
- dispensing device 65 is purged when control valve 55 is in a position allowing flow through passage 70 and control valve 125 is in a position allowing flow through passage 160.
- Control valve 120 may be in a position blocking flow through passage 150 and pump 30 may be turned off.
- Pressurized air from pressurized source 45 is transferred into dispensing device 65 via passages 70 and 75 and enters nozzle 85 via passage 90. Pressurized air then enters chamber 100. Because pump 30 is not operating at this time, passage 95 offers less resistance to flow than the pressure restriction of orifices 110. Pressurized air thus flows into passage 95 and flows out of dispensing device 65 via passage 80. The flow of pressurized air will then urge the remaining reductant out of dispensing device 65.
- the mixture of reductant and pressurized air is urged through passage 160 and returned to reductant source 35. Reductant is thereby purged from dispensing device 65 to reductant source 35 in a direction that is opposite to a direction of reductant flow during dosing. As illustrated in Fig. 3, dispensing device 65 and pump 30 is purged when control valves 55, 120, and 125 are in positions allowing flow through passages 70, 150, and 160, respectively. Pump 30 may be turned off. As described above, pressurized air purges reductant from dispensing device 65 into reductant source 35. Pressurized air also flows from pressurized source 45, toward the inlet of pump 30, via passage 150. Pressurized air urges the reductant remaining in pump 30 between the pump inlet and outlet out of pump 30.
- pump 30 may be provided with freeze-protection such as, for example, a heating device.
- dispensing device 65 and pump 30 may also be purged via purging system 225.
- Control valve 200 may be in the second position, fluidly connecting the outlet of pump 30 to reductant source 35 via passage 215.
- Control valve 205 may be in a position allowing flow through passage 220.
- Dispensing device 65 is purged as described above and shown in Fig. 5. The purging mixture of pressurized air and reductant from dispensing device 65 then flows toward the inlet of pump 30 via passage 220 and through pump 30. Once the purging mixture exits the outlet of pump 30, the mixture is returned to reductant source 35 via passage 215.
- step 320 If the temperature within exhaust system 12 exceeds the threshold temperature, purging is stopped and dosing may begin again in step 320.
- the dosing of step 320 is similar to step 310. Steps 315 and 320 may be repeated as required, based on the temperature within exhaust system 12.
- the engine may be turned off by an operator and/or controller 135 in step 325.
- step 330 dispensing device 65 and pump 30 may be purged in a manner similar to step 315.
- Dosing system 10 may be used to purge reductant from dosing components to prevent damage and/or clogging. Dosing system 10 may purge reductant out of dispensing device 65 and toward reductant source 35. Reductant may thereby be removed to prevent damage to dosing components and/or the exhaust system from expansion of frozen reductant. Dosing system 10 may also purge reductant to avoid formation of polymer and the resulting clogging that may occur in nozzle 85 and exhaust system 12. Because dosing system 10 may purge reductant back to reductant source 35, instead of into exhaust system 12, release of the reductant into the environment may be substantially reduced. Release of offensive-smelling odor into the environment may thereby be significantly reduced.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
L'invention porte sur un procédé de purge d'un réducteur. Le procédé comprend la distribution du réducteur dans un système d'échappement (12) par l'intermédiaire d'un dispositif de distribution (65). Le procédé comprend également la purge du dispositif de distribution en poussant le réducteur du dispositif de distribution à une source de réducteur (35).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009801461248A CN102216578B (zh) | 2008-11-19 | 2009-11-19 | 用于清洗计量系统的方法 |
DE112009003686T DE112009003686T5 (de) | 2008-11-19 | 2009-11-19 | Verfahren zum Spülen eines Dosierungssystems |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/292,459 | 2008-11-19 | ||
US12/292,459 US8459012B2 (en) | 2008-11-19 | 2008-11-19 | Method for purging a dosing system |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2010059819A2 true WO2010059819A2 (fr) | 2010-05-27 |
WO2010059819A3 WO2010059819A3 (fr) | 2010-08-26 |
Family
ID=42170923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2009/065141 WO2010059819A2 (fr) | 2008-11-19 | 2009-11-19 | Procédé de purge d'un système de dosage |
Country Status (4)
Country | Link |
---|---|
US (1) | US8459012B2 (fr) |
CN (1) | CN102216578B (fr) |
DE (1) | DE112009003686T5 (fr) |
WO (1) | WO2010059819A2 (fr) |
Families Citing this family (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2921105A1 (fr) * | 2007-09-14 | 2009-03-20 | Inergy Automotive Systems Res | Systeme scr et methode pour sa purge |
DE102008013960A1 (de) * | 2008-03-12 | 2009-09-17 | Albonair Gmbh | Dosiersystem zur Eindüsung einer Harnstofflösung in den Abgasstrom eines Verbrennungsmotors |
US8291926B2 (en) * | 2009-02-20 | 2012-10-23 | Caterpillar Inc. | Reductant dosing system having anti-aeration device |
DE102009016810A1 (de) * | 2009-04-09 | 2010-10-14 | Albonair Gmbh | Dosiersystem zur Eindüsung eines Reduktionsmittels in den Abgasstrom eines Verbrennungsmotors |
DE102009029473A1 (de) * | 2009-09-15 | 2011-03-24 | Robert Bosch Gmbh | Dosiermodul für ein flüssiges Reduktionsmittel |
US8935918B2 (en) * | 2010-04-23 | 2015-01-20 | GM Global Technology Operations LLC | Reconfigurable mixer for an exhaust aftertreatment system and method of using the same |
JP2011247135A (ja) * | 2010-05-25 | 2011-12-08 | Isuzu Motors Ltd | Scrシステム |
US20120020857A1 (en) * | 2010-07-21 | 2012-01-26 | Isada Raymond Upano | Dosing system having recirculation heating and vacuum draining |
DE102010040365A1 (de) * | 2010-09-07 | 2012-03-08 | Robert Bosch Gmbh | Druckluftzerstäuber |
DE102011081628A1 (de) * | 2011-08-26 | 2013-02-28 | Robert Bosch Gmbh | Dosiersystem für ein flüssiges Reduktionsmittel |
US8931259B2 (en) | 2011-09-02 | 2015-01-13 | Mi Yan | Reductant delivery apparatus with purging means |
US20130074936A1 (en) * | 2011-09-27 | 2013-03-28 | Caterpillar Inc. | Mis-fill prevention system |
JP5501324B2 (ja) * | 2011-11-29 | 2014-05-21 | 日野自動車株式会社 | インジェクタの制御方法 |
CN103291421B (zh) | 2012-02-23 | 2016-06-08 | 天纳克(苏州)排放系统有限公司 | 空气辅助式还原剂计量喷射系统 |
WO2013165430A1 (fr) * | 2012-05-03 | 2013-11-07 | International Engine Intellectual Property Company, Llc | Modulateur d' écoulement d'ammoniac pour empêcher une accumulation d'humidité |
JP5609924B2 (ja) * | 2012-07-02 | 2014-10-22 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
FI126044B (en) * | 2012-10-17 | 2016-06-15 | Waertsilae Finland Oy | Urea injection system for an internal combustion engine |
DE102013002758B4 (de) | 2013-02-19 | 2020-03-19 | Woodward L'orange Gmbh | Spülverfahren zur Durchführung mit einem Kraftstoffinjektor |
US9689291B2 (en) | 2013-03-15 | 2017-06-27 | Cummins Ip, Inc. | Pump purge for urea dosing system |
US10473014B2 (en) * | 2013-12-23 | 2019-11-12 | Baohua Qi | Low pressure atomizing injector |
US9140166B1 (en) | 2014-04-04 | 2015-09-22 | Caterpillar Inc. | Reductant dosing system |
US20140241948A1 (en) * | 2014-05-07 | 2014-08-28 | Caterpillar Inc. | Reductant delivery system |
US9387437B2 (en) | 2014-05-21 | 2016-07-12 | Caterpillar Inc. | Reductant supply system |
CN105626215A (zh) * | 2014-10-27 | 2016-06-01 | 金有纯 | 调控进入排气系统的尿素实际供给量的装置及调控方法 |
FR3031356B1 (fr) * | 2015-01-07 | 2017-07-14 | Peugeot Citroen Automobiles Sa | Procede de gestion d'un systeme de depollution d'un vehicule automobile |
US10677231B2 (en) * | 2015-03-06 | 2020-06-09 | Cummins Emission Solutions, Inc. | Systems and methods for purging an exhaust reductant delivery system |
US9670818B2 (en) | 2015-08-07 | 2017-06-06 | Caterpillar Inc. | Air-assist dosing system having priming detection |
US9664084B2 (en) * | 2015-09-22 | 2017-05-30 | Caterpillar Inc. | Emission reduction system |
US9657628B1 (en) | 2016-01-29 | 2017-05-23 | Caterpillar Inc. | Reductant supply system for engine |
EP3324014A1 (fr) * | 2016-11-22 | 2018-05-23 | Volvo Truck Corporation | Agencement pour un système de post-traitement des gaz d'échappement |
CN106837489B (zh) * | 2017-03-10 | 2018-12-14 | 江苏大学 | 一种scr供给喷射系统防结晶装置及方法 |
US10253668B2 (en) * | 2017-06-20 | 2019-04-09 | Hino Motors, Ltd. | Urea SCR system |
DE102017115345A1 (de) * | 2017-07-10 | 2019-01-10 | Washtec Holding Gmbh | Waschanlage mit regelbarer Dosierung |
US10641152B2 (en) | 2017-12-04 | 2020-05-05 | Caterpillar Inc. | Control system for a reductant dosing system |
US11040308B2 (en) | 2018-07-05 | 2021-06-22 | Cummins Emission Solutions Inc. | Systems and methods for purging reductant from a reductant injector |
KR102543187B1 (ko) | 2018-11-09 | 2023-06-15 | 삼성전자주식회사 | 밸브 장치 |
US11143074B2 (en) | 2019-07-30 | 2021-10-12 | Delphi Technologies Ip Limited | Reagent dosing system and method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6845611B2 (en) * | 2001-12-03 | 2005-01-25 | Purem Abgassysteme Gmbh & Co. Kg | Reducing agent dosing device |
JP2005248924A (ja) * | 2004-03-08 | 2005-09-15 | Nissan Diesel Motor Co Ltd | エンジンの排気浄化装置 |
WO2008001598A1 (fr) * | 2006-06-26 | 2008-01-03 | Nissan Diesel Motor Co., Ltd. | Dispositif de réduction des émissions de gaz d'échappement du moteur |
US20080022663A1 (en) * | 2006-07-26 | 2008-01-31 | Dodge Lee G | System and method for dispensing an aqueous urea solution into an exhaust gas stream |
Family Cites Families (62)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4987738A (en) | 1989-10-27 | 1991-01-29 | General Motors Corporation | Particulate trap system for an internal combustion engine |
DE4038054A1 (de) | 1990-11-29 | 1992-06-04 | Man Technologie Gmbh | Verfahren und vorrichtung zur selektiven katalytischen no(pfeil abwaerts)x(pfeil abwaerts)-reduktion in sauerstoffhaltigen abgasen |
JPH06185353A (ja) | 1992-12-14 | 1994-07-05 | Sanshin Ind Co Ltd | 船舶推進機の排気装置 |
DE4308542A1 (de) | 1993-03-17 | 1994-09-22 | Man Nutzfahrzeuge Ag | Verfahren und Vorrichtung zur selektiven katalytischen Reduktion von NO¶x¶ in sauerstoffhaltigen Gasen |
US5522218A (en) | 1994-08-23 | 1996-06-04 | Caterpillar Inc. | Combustion exhaust purification system and method |
DE59507350D1 (de) | 1994-09-13 | 2000-01-05 | Siemens Ag | Verfahren und einrichtung zum einbringen von flüssigkeit in eine abgasreinigungsvorrichtung |
US6063350A (en) * | 1997-04-02 | 2000-05-16 | Clean Diesel Technologies, Inc. | Reducing nox emissions from an engine by temperature-controlled urea injection for selective catalytic reduction |
US5809775A (en) | 1997-04-02 | 1998-09-22 | Clean Diesel Technologies, Inc. | Reducing NOx emissions from an engine by selective catalytic reduction utilizing solid reagents |
US5976475A (en) | 1997-04-02 | 1999-11-02 | Clean Diesel Technologies, Inc. | Reducing NOx emissions from an engine by temperature-controlled urea injection for selective catalytic reduction |
DE19719998C2 (de) | 1997-05-13 | 2003-10-30 | Daimler Chrysler Ag | Verfahren und Vorrichtung zur Stickoxidreduktion im Abgas einer Verbrennungseinrichtung |
US6279603B1 (en) | 1998-10-01 | 2001-08-28 | Ambac International | Fluid-cooled injector |
DE69916312T2 (de) | 1998-10-12 | 2005-03-17 | Johnson Matthey Public Ltd., Co. | Verfahren und vorrichtung zur behandlung von verbrennungsabgasen |
DE19919472C2 (de) | 1999-04-29 | 2001-04-19 | Bosch Gmbh Robert | Vorrichtung und Verfahren zur Detektion von Ammoniak |
US6146605A (en) | 1999-07-26 | 2000-11-14 | Hera, Llc | Combined SCR/SNCR process |
US6363771B1 (en) | 1999-11-24 | 2002-04-02 | Caterpillar Inc. | Emissions diagnostic system |
US6427439B1 (en) | 2000-07-13 | 2002-08-06 | Ford Global Technologies, Inc. | Method and system for NOx reduction |
US6826906B2 (en) | 2000-08-15 | 2004-12-07 | Engelhard Corporation | Exhaust system for enhanced reduction of nitrogen oxides and particulates from diesel engines |
US6415602B1 (en) | 2000-10-16 | 2002-07-09 | Engelhard Corporation | Control system for mobile NOx SCR applications |
US6761868B2 (en) | 2001-05-16 | 2004-07-13 | The Chemithon Corporation | Process for quantitatively converting urea to ammonia on demand |
US6546720B2 (en) | 2001-09-04 | 2003-04-15 | Ford Global Technologies, Inc. | Method and apparatus for controlling the amount of reactant to be added to a substance using a sensor which is responsive to both the reactant and the substance |
US6526753B1 (en) | 2001-12-17 | 2003-03-04 | Caterpillar Inc | Exhaust gas regenerator/particulate trap for an internal combustion engine |
US7264785B2 (en) | 2001-12-20 | 2007-09-04 | Johnson Matthey Public Limited Company | Selective catalytic reduction |
DE10206028A1 (de) | 2002-02-14 | 2003-08-28 | Man Nutzfahrzeuge Ag | Verfahren und Vorrichtung zur Erzeugung von Ammoniak |
US7065958B2 (en) | 2002-05-07 | 2006-06-27 | Extengine Transport Systems | Emission control system |
WO2004024336A1 (fr) | 2002-09-13 | 2004-03-25 | The Ohio State University | Systeme d'atomisation de liquide pour applications dans le domaine de l'automobile |
DE10251498A1 (de) | 2002-11-04 | 2004-05-19 | Universität Kaiserslautern | Vorrichtung und Verfahren zur Dosierung und Förderung von trockenem Harnstoff, insbesondere bei der Durchführung des SCR-Verfahrens in Kraftfahrzeugen |
US6895747B2 (en) | 2002-11-21 | 2005-05-24 | Ford Global Technologies, Llc | Diesel aftertreatment systems |
US6941746B2 (en) | 2002-11-21 | 2005-09-13 | Combustion Components Associates, Inc. | Mobile diesel selective catalytic reduction systems and methods |
DE10254981A1 (de) * | 2002-11-26 | 2004-06-03 | Robert Bosch Gmbh | Vorrichtung zur Entfernung eines Reduktionsmittels aus einer Apparatur zum Nachbehandeln von Abgasen einer Brennkraftmaschine |
US6871490B2 (en) | 2002-12-19 | 2005-03-29 | Caterpillar Inc | Emissions control system for increasing selective catalytic reduction efficiency |
EP1594594B1 (fr) | 2003-02-12 | 2012-05-23 | Delphi Technologies, Inc. | Systeme de reduction des oxydes d'azote |
DE10316184A1 (de) | 2003-04-09 | 2004-10-28 | Robert Bosch Gmbh | Verfahren zur Dosierung eines Reagenzmittels in den Abgasstrom einer Brennkraftmaschine |
JP2007505266A (ja) | 2003-06-12 | 2007-03-08 | ドナルドソン カンパニー,インコーポレイティド | 排気システムの過渡的な流れ中に燃料を供給する方法 |
EP2426328B1 (fr) | 2003-09-19 | 2013-04-10 | Nissan Diesel Motor Co., Ltd. | Dispositif de purification de gaz d'échappement de moteur |
DE10346220A1 (de) | 2003-09-23 | 2005-04-14 | Robert Bosch Gmbh | Brennkraftmaschine mit Abgasnachbehandlungssystem |
DE102004001331A1 (de) | 2004-01-08 | 2005-07-28 | Robert Bosch Gmbh | Verfahren zur Dosierung von Ammoniak in den Abgasbereich einer Brennkraftmaschine und Vorrichtung zur Durchführung des Verfahrens |
JP2005248823A (ja) * | 2004-03-04 | 2005-09-15 | Hino Motors Ltd | 還元剤供給装置 |
US7467749B2 (en) | 2004-04-26 | 2008-12-23 | Tenneco Automotive Operating Company Inc. | Methods and apparatus for injecting atomized reagent |
JP4137838B2 (ja) | 2004-04-30 | 2008-08-20 | ボッシュ株式会社 | 排気ガス後処理装置用液体供給装置 |
US20050252201A1 (en) | 2004-05-17 | 2005-11-17 | Lecea Oscar A | Method and apparatus for reducing NOx emissions |
US7275366B2 (en) | 2004-09-14 | 2007-10-02 | Advanced Cleanup Technologies, Inc. | High thermal efficiency Selective Catalytic Reduction (SCR) system |
JP2006125247A (ja) | 2004-10-27 | 2006-05-18 | Hitachi Ltd | エンジンの排気ガス浄化方法及び排気ガス浄化装置 |
FR2879239A1 (fr) * | 2004-12-15 | 2006-06-16 | Inergy Automotive Systems Res | Systeme de stockage et d'injection d'un additif dans des gaz d'echappement d'un moteur |
ATE369486T1 (de) | 2004-12-18 | 2007-08-15 | Haldor Topsoe As | Verfahren zur regelung der zugabe eines reduktionsmittels in das abgas einer brennkraftmaschine |
CA2508159C (fr) | 2005-05-24 | 2009-05-05 | Ecocing Corporation | Convertisseur catalytique a inversion d'ecoulement ameliore pour moteurs a combustion interne |
JP2007032472A (ja) | 2005-07-28 | 2007-02-08 | Hitachi Ltd | 尿素水を用いた排気処理装置 |
US7418816B2 (en) * | 2005-09-01 | 2008-09-02 | Ford Global Technologies, Llc | Exhaust gas aftertreatment systems |
DE202006010615U1 (de) | 2005-09-26 | 2006-10-26 | Dbk David + Baader Gmbh | Tanksystem mit einem Haupttank und einer Abschmelzvorrichtung mit Schmelztank |
US7578321B2 (en) | 2005-10-13 | 2009-08-25 | Ford Global Technologies, Llc | Freeze protection for on-board vehicle emissions treatment system |
BRPI0711722A2 (pt) | 2006-05-31 | 2011-11-29 | Tenneco Automotive Operating | método e aparelho para a redução de emissões em motores a diesel |
ATE512300T1 (de) | 2006-07-12 | 2011-06-15 | Delphi Tech Holding Sarl | Dosierpumpe für eines reduktionsmittels |
US20080022660A1 (en) | 2006-07-21 | 2008-01-31 | Eaton Corporation | Method for controlled DPF regeneration |
US7610751B2 (en) | 2006-07-21 | 2009-11-03 | Eaton Corporation | Fuel injection before turbocharger |
US7426825B2 (en) | 2006-07-25 | 2008-09-23 | Gm Global Technology Operations, Inc. | Method and apparatus for urea injection in an exhaust aftertreatment system |
US20080034734A1 (en) | 2006-08-14 | 2008-02-14 | Kevin James Karkkainen | Fuel supply component cleaning system |
US20080035187A1 (en) | 2006-08-14 | 2008-02-14 | Cory Andrew Brown | Fuel supply component cleaning system |
US20080034733A1 (en) | 2006-08-14 | 2008-02-14 | Miller Robert L | Fuel supply component purging system |
US7726118B2 (en) | 2006-09-18 | 2010-06-01 | Ford Global Technologies, Llc | Engine-off ammonia vapor management system and method |
US8015801B2 (en) | 2006-09-18 | 2011-09-13 | Ford Global Technologies, Llc | Management of a plurality of reductants for selective catalytic reduction |
US8800268B2 (en) | 2006-12-01 | 2014-08-12 | Basf Corporation | Zone coated filter, emission treatment systems and methods |
US8215100B2 (en) | 2007-03-02 | 2012-07-10 | Caterpillar Inc. | Regeneration device having external check valve |
US20090301064A1 (en) * | 2008-06-05 | 2009-12-10 | Eugen Maier | Urea pump assembly for an exhaust gas treatment system |
-
2008
- 2008-11-19 US US12/292,459 patent/US8459012B2/en not_active Expired - Fee Related
-
2009
- 2009-11-19 CN CN2009801461248A patent/CN102216578B/zh not_active Expired - Fee Related
- 2009-11-19 DE DE112009003686T patent/DE112009003686T5/de not_active Withdrawn
- 2009-11-19 WO PCT/US2009/065141 patent/WO2010059819A2/fr active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6845611B2 (en) * | 2001-12-03 | 2005-01-25 | Purem Abgassysteme Gmbh & Co. Kg | Reducing agent dosing device |
JP2005248924A (ja) * | 2004-03-08 | 2005-09-15 | Nissan Diesel Motor Co Ltd | エンジンの排気浄化装置 |
WO2008001598A1 (fr) * | 2006-06-26 | 2008-01-03 | Nissan Diesel Motor Co., Ltd. | Dispositif de réduction des émissions de gaz d'échappement du moteur |
US20080022663A1 (en) * | 2006-07-26 | 2008-01-31 | Dodge Lee G | System and method for dispensing an aqueous urea solution into an exhaust gas stream |
Also Published As
Publication number | Publication date |
---|---|
CN102216578B (zh) | 2013-12-11 |
CN102216578A (zh) | 2011-10-12 |
US8459012B2 (en) | 2013-06-11 |
DE112009003686T5 (de) | 2012-11-15 |
US20100122521A1 (en) | 2010-05-20 |
WO2010059819A3 (fr) | 2010-08-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8459012B2 (en) | Method for purging a dosing system | |
US8359833B2 (en) | Method for introducing a reductant into an exhaust stream | |
JP6163552B2 (ja) | エア駆動還元剤輸送システム | |
KR101716399B1 (ko) | 내연기관의 배기가스 유동에 요소 용액을 주입하기 위한 계량 시스템 | |
US8943808B2 (en) | Reductant dosing system | |
US8393142B2 (en) | Reductant dosing manifold | |
US20130055701A1 (en) | Reductant delivery apparatus with purging means | |
CN102979604B (zh) | 一种还原剂喷射计量装置 | |
US9359928B2 (en) | Air-assisted reductant delivery system | |
CN102245869B (zh) | 用于匹配喷射系统中的喷射剂供给的方法 | |
US8291926B2 (en) | Reductant dosing system having anti-aeration device | |
KR20080114744A (ko) | 차량 배기 가스 내의 유해 물질 환원 방법 및 계량 공급 시스템 | |
CN104564256B (zh) | 用于选择性催化还原系统的还原剂输送单元的排放系统 | |
US20110214418A1 (en) | Component carrier for a dosing system | |
US20140352280A1 (en) | Air driven reductant dosing system | |
WO2015021644A1 (fr) | Système de traitement d'échappement à injection d'eau | |
WO2003033111A2 (fr) | Procede et dispositif pour le retraitement des gaz d'echappement d'un moteur a combustion interne | |
CN102251832B (zh) | Scr系统中的液体加热式计量喷射泵 | |
US9057300B2 (en) | Reducing agent metering system with metering chamber for exact setting of the metered amount | |
US20130240067A1 (en) | Reducing Agent Dosting System for Injection Reducing Agent into the Exhaust Gas Flow of an Internal Combustion Engine | |
CN107532495B (zh) | 具有模块化结构的还原剂计量系统 | |
US11384667B2 (en) | Exhaust aftertreatment system with heated dosing control | |
KR20180024745A (ko) | 환원제 공급 시스템 | |
KR102367294B1 (ko) | 환원제 공급 시스템 | |
KR101896554B1 (ko) | 배기후처리 시스템용 우레아 공급 시스템 및 방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200980146124.8 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09828219 Country of ref document: EP Kind code of ref document: A2 |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 09828219 Country of ref document: EP Kind code of ref document: A2 |