DE19947198B4 - Device for aftertreatment of exhaust gases of an internal combustion engine - Google Patents
Device for aftertreatment of exhaust gases of an internal combustion engine Download PDFInfo
- Publication number
- DE19947198B4 DE19947198B4 DE19947198A DE19947198A DE19947198B4 DE 19947198 B4 DE19947198 B4 DE 19947198B4 DE 19947198 A DE19947198 A DE 19947198A DE 19947198 A DE19947198 A DE 19947198A DE 19947198 B4 DE19947198 B4 DE 19947198B4
- Authority
- DE
- Germany
- Prior art keywords
- reducing agent
- line
- pressure
- compressed air
- urea
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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
- F01N9/00—Electrical control of exhaust gas treating apparatus
-
- 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]
-
- 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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/36—Arrangements for supply of additional fuel
-
- 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
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- F01N2610/1473—Overflow or return means for the substances, e.g. conduits or valves for the return path
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Vorrichtung zum Nachbehandeln von Abgasen einer Brennkraftmaschine unter Verwendung eines in die Abgase einzubringenden Reduktionsmittels, insbesondere eines Harnstoffs und/oder einer Harnstoff-Wasser-Lösung, mit einer Mischkammer (8), in welche in einem Reduktionsmittelspeicher (1) gespeichertes Reduktionsmittel über eine Reduktionsmittelleitung (1a), und in einem Druckluftspeicher (20) enthaltene Druckluft über eine Druckluftleitung (24) zur Erzeugung eines Reduktionsmittel-Luftgemisches einbringbar sind, gekennzeichnet durch einen geschlossenen Regelkreis (1a, 10, 11, 50, 51, 52) zur Regelung und/oder Steuerung eines in der Reduktionsmittelleitung (1a) herrschenden Druckes, wobei der Regelkreis eingerichtet ist zur Entlüftung der Reduktionsmittelleitung (1a).contraption for post-treatment of exhaust gases of an internal combustion engine using a to be introduced into the exhaust reducing agent, in particular a urea and / or a urea-water solution, with a mixing chamber (8), in which in a reducing agent storage (1) stored reducing agent via a reducing agent line (1a), and in a compressed air reservoir (20) contained compressed air via a compressed air line (24) for generating a reducing agent-air mixture einbringbar characterized by a closed loop (1a, 10, 11, 50, 51, 52) for controlling and / or controlling one in the reducing agent line (1a) prevailing pressure, wherein the control circuit is established for venting the reducing agent line (1a).
Description
Die vorliegende Erfindung betrifft eine Vorrichtung zum Nachbehandeln von Abgasen einer Brennkraftmaschine unter Verwendung eines in die Abgase einzubringenden Reduktionsmittels, insbesondere Harnstoff bzw. Harnstoff-Wasser-Lösung, nach dem Oberbegriff des Patentanspruchs 1.The The present invention relates to an aftertreatment device of exhaust gases of an internal combustion engine using one in the exhaust gases to be introduced reducing agent, in particular urea or urea-water solution, after the preamble of claim 1.
Als Folge der in den letzten Jahren stets niedriger anzusetzenden Schadstoffgrenzwerte sind zahlreiche Vorrichtungen und Verfahren zur Nachbehandlung von Abgasen in Brennkraftmaschinen entwickelt worden. Beispielsweise mittels Katalysatorsystemen, welche Harnstoff und/oder Ammoniak als Reduktionsmittel zur NOx-Konvertierung verwenden, sind effiziente Abgasnachbehandlungssysteme zur Verfügung gestellt.As a result of the always lower to be applied in recent years emission limits numerous devices and methods have been developed for the aftertreatment of exhaust gases in internal combustion engines. For example, by means of catalyst systems which use urea and / or ammonia as a reducing agent for NO x conversion, efficient exhaust aftertreatment systems are provided.
Um eine Verminderung von NOx-Bestandteilen in Abgasen zu erzielen, wurden insbesondere für Dieselmotoren Reduktionskatalysatoren entwickelt, die üblicherweise in sogenannte SCR-Katalysatoren (engl. Selective Catalytic Reduction) mit Harnstoffdosiersystem und Speicherkatalysatoren unterteilt werden. Die sogenannten SCR-Katalysatoren werden mittels einer Harnstoff- und/oder Ammoniakreduktionsmittelzufuhr generiert, während die sogenannten Speicherkatalysatoren mit Kohlenwasserstoffen des mitgeführten Brennkraftmaschinen-Brennstoffs in sogenannten Abgasfettphasen regeneriert werden.In order to achieve a reduction of NO x components in exhaust gases, reduction catalysts have been developed especially for diesel engines, which are usually divided into so-called SCR (Selective Catalytic Reduction) catalysts with urea dosing system and storage catalysts. The so-called SCR catalysts are generated by means of a urea and / or ammonia reducing agent supply, while the so-called storage catalysts are regenerated with hydrocarbons of the entrained engine fuel in so-called exhaust gas fat phases.
Aus
der
Aus
der
Es
ist beispielsweise aus der
Die
Die
Aufgabe der Erfindung ist die Verbesserung einer gattungsgemäßen Vorrichtung zur Nachbehandlung von Abgasen dahingehend, dass eine Druckregelung des Betriebsdrucks des zugeführten Reduktionsmittels in einfacher und zuverlässiger Weise gewährleistet ist.task The invention is the improvement of a generic device for the aftertreatment of exhaust gases to the effect that a pressure control the operating pressure of the supplied reducing agent in a simple and reliable way guaranteed is.
Diese Aufgabe wird gelöst durch eine Vorrichtung mit den Merkmalen des Patentanspruchs 1.These Task is solved by a device having the features of patent claim 1.
Durch die erfindungsgemäße Maßnahme, einen geschlossenen Regelkreis zur Regelung bzw. Steuerung eines in der Reduktionsmittelleitung herrschenden Drucks zu verwenden, können die oben erwähnten Effekte, insbesondere Drifteffekte und Nichtlinearitäten, kompensiert werden, wobei darüber hinaus mehrdimensionale Kennfelder einer Druckregelung darstellbar sind; dabei ist der Regelkreis eingerichtet zur Entlüftung der Reduktionsmittelleitung. Dies führt beispielsweise dazu, dass ein in der Reduktionsmittelleitung herrschender Druck unabhängig von einer der Mischkammer der Vorrichtung zuzuführenden Reduktionsmittelmenge eingestellt werden kann, beispielsweise kann ein mit zunehmender Reduktionsmittelmenge steigender Mischkammerdruck kompensiert werden.By the measure according to the invention, a closed loop for controlling or controlling a to use in the reducing agent line prevailing pressure, can the ones mentioned above Effects, especially drift effects and nonlinearities, compensated Beyond that In addition, multi-dimensional maps of a pressure control can be displayed are; while the control circuit is set up to vent the Reducing agent line. this leads to For example, that a prevailing in the reducing agent line pressure independently from an amount of reducing agent to be supplied to the mixing chamber of the device can be adjusted, for example, one with increasing Reducing agent amount increasing mixing chamber pressure can be compensated.
Mittels des erfindungsgemäß vorgesehenen geschlossenen Regelkreises mit frei steuerbarem Reduktionsmitteldruck kann somit die Reduktionsmittel-Dosierung und Gemischaufbereitung den jeweiligen Betriebszuständen angepaßt werden.through the inventively provided closed Control circuit with freely controllable reducing agent pressure can thus the reducing agent dosage and mixture preparation the respective operating conditions customized become.
Vorteilhafte Ausgestaltungen der erfindungsgemäßen Vorrichtung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention According to the device are the subject of the dependent claims.
Gemäß einer bevorzugten Ausführung der erfindungsgemäßen Vorrichtung weist der geschlossene Regelkreis ein mittels eines Steuergerätes ansteuerbares Magnetventil zur Druckregelung und einen mit dem Steuergerät in Wirkverbindung stehenden Drucksensor zur Detektierung des in der Reduktionsmittelleitung herrschenden Druckes auf. Derartige Bauteile sind in preiswerter Weise verfügbar und erweisen sich in der Praxis als robust und zuverlässig, so daß auf der Grundlage derartiger Bauteile ein zuverlässiger Regelkreis bereitstellbar ist.According to one preferred embodiment the device according to the invention the closed-loop control system can be activated by means of a control unit Solenoid valve for pressure control and one with the control unit in operative connection standing pressure sensor for detecting the in the reducing agent line prevailing pressure. Such components are cheaper Way available and prove to be robust and reliable in practice, so that on the basis of such components provide a reliable control loop is.
Zweckmäßigerweise ist das Reduktionsmittel über ein als Magnetventil ausgeführtes Einspritzventil in die Mischkammer einführbar, wobei das Einspritzventil insbesondere baugleich mit dem Magnetventil zur Druckregelung in der Reduktionsmittelleitung ausgebildet ist. Durch baugleiche Ausbildung der erwähnten Einspritzventile sind die Kosten der Vorrichtung insgesamt weiter reduzierbar.Conveniently, is the reducing agent over a designed as a solenoid valve Injection valve inserted into the mixing chamber, wherein the injection valve in particular identical with the solenoid valve for pressure control in the reducing agent line is formed. By identical design of the mentioned Injectors are the cost of the device overall reducible.
Die Erfindung wird nun anhand einer bevorzugten Ausführungsform weiter beschrieben. Es zeigtThe Invention will now be further described with reference to a preferred embodiment. It shows
In
Der
Drucksensor
Mit
In
der Mischkammer
Das
Steuergerät
Claims (3)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19947198A DE19947198B4 (en) | 1999-10-01 | 1999-10-01 | Device for aftertreatment of exhaust gases of an internal combustion engine |
PCT/DE2000/003300 WO2001025601A1 (en) | 1999-10-01 | 2000-09-22 | Device for treatment of waste gases from an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19947198A DE19947198B4 (en) | 1999-10-01 | 1999-10-01 | Device for aftertreatment of exhaust gases of an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19947198A1 DE19947198A1 (en) | 2001-04-05 |
DE19947198B4 true DE19947198B4 (en) | 2008-05-15 |
Family
ID=7924069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19947198A Expired - Fee Related DE19947198B4 (en) | 1999-10-01 | 1999-10-01 | Device for aftertreatment of exhaust gases of an internal combustion engine |
Country Status (2)
Country | Link |
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DE (1) | DE19947198B4 (en) |
WO (1) | WO2001025601A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8074673B2 (en) | 2004-05-18 | 2011-12-13 | Hydraulik-Ring Gmbh | Freeze-resistant metering valve |
US8201393B2 (en) | 2008-03-05 | 2012-06-19 | Hilite Germany Gmbh | Exhaust-gas aftertreatment device |
US8266892B2 (en) | 2007-01-25 | 2012-09-18 | Friedrich Zapf | Calibrated dosing unit, especially of an exhaust gas treatment unit |
US8875502B2 (en) | 2010-12-14 | 2014-11-04 | Cummins Ltd. | SCR exhaust gas aftertreatment device |
US8938949B2 (en) | 2009-08-03 | 2015-01-27 | Cummins Ltd. | SCR exhaust gas aftertreatment device |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10047516A1 (en) | 2000-09-22 | 2002-04-18 | Bosch Gmbh Robert | Method and device for dosing a reducing agent for removing nitrogen oxides from exhaust gases |
DE10127834A1 (en) | 2001-06-08 | 2002-12-12 | Bosch Gmbh Robert | Device for dosing a reducing agent, especially urea or a urea-water solution, comprises units for introducing the agent into a catalyst arrangement, a dosing valve arranged at the end |
JP4720054B2 (en) * | 2001-09-11 | 2011-07-13 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
DE20119513U1 (en) | 2001-12-03 | 2002-02-28 | PUREM Abgassysteme GmbH & Co. KG, 58706 Menden | Reduktionsmitteldosiereinrichtung |
DE20119514U1 (en) | 2001-12-03 | 2002-02-28 | PUREM Abgassysteme GmbH & Co. KG, 58706 Menden | Reduktionsmitteldosiereinrichtung |
DE102004018221A1 (en) * | 2004-04-15 | 2005-11-10 | Robert Bosch Gmbh | Method for introducing a reagent into an exhaust duct of an internal combustion engine and device for carrying out the method |
ITMI20041318A1 (en) * | 2004-06-30 | 2004-09-30 | Iveco Spa | EQUIPMENT AND METHOD FOR INJECTION OF A LIQUID TO A GASEOUS CURRENT EXHAUST GAS TREATMENT PLANT AND VEHICLE EQUIPPED WITH SUCH SYSTEM |
DE102004043366A1 (en) * | 2004-09-08 | 2006-03-09 | Robert Bosch Gmbh | Injecting a reagent into an engine exhaust system comprises determining if a spray pipe is blocked by monitoring reagent and air pressures |
JP2006132392A (en) * | 2004-11-04 | 2006-05-25 | Mitsubishi Fuso Truck & Bus Corp | Exhaust emission control device for internal combustion engine |
DE102004056412B4 (en) * | 2004-11-23 | 2016-06-16 | Robert Bosch Gmbh | Method for operating an internal combustion engine and device for carrying out the method |
CN101356345B (en) * | 2005-12-22 | 2010-12-15 | 格兰富Nonox公司 | A fluid transfer system and method |
DE102007033470B4 (en) * | 2007-07-18 | 2012-10-25 | Continental Automotive Gmbh | Apparatus and method for metering a reducing agent into an exhaust tract of a vehicle |
DE102009005790B4 (en) * | 2009-01-22 | 2023-05-17 | Albonair Gmbh | dosing system |
DE102008013960A1 (en) * | 2008-03-12 | 2009-09-17 | Albonair Gmbh | Dosing system for injecting a urea solution into the exhaust stream of an internal combustion engine |
CN101737127B (en) * | 2008-11-25 | 2012-01-25 | 无锡油泵油嘴研究所 | SCP urea injection system for post treatment of diesel engine emissions |
US9272244B2 (en) | 2009-01-22 | 2016-03-01 | Albonair Gmbh | Metering system |
DE102010018613A1 (en) | 2010-04-28 | 2011-11-03 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Device for conveying reducing agent |
DE102011087856A1 (en) | 2011-12-07 | 2013-06-13 | Robert Bosch Gmbh | Damping element for e.g. hydraulic damping pressure fluctuations, in fluid-carrying arrangement in combustion engine of vehicle, has supporting element carrying distributed locations when compensating element experiences deformation |
DE102011089502A1 (en) | 2011-12-22 | 2013-06-27 | Robert Bosch Gmbh | Device for measuring flow rate of fluid such as aqueous urea solution, of fluid dose arrangement of combustion engine used in vehicle, has orifice and return valve that are provided in measuring conduit which is bridged with passage |
DE102012216283A1 (en) | 2012-09-13 | 2014-03-13 | Robert Bosch Gmbh | Pneumatically operated diaphragm pump for proportioning aid to post-treatment of exhaust gas from combustion engine of motor car, has switchable single piloted valve for moving conveying element arranged in element space |
DE102014220150A1 (en) | 2014-10-06 | 2016-04-07 | Robert Bosch Gmbh | Method for pressure control of an SCR denoxing system of a motor vehicle |
US10458302B2 (en) | 2015-08-20 | 2019-10-29 | Tenneco Automotive Operating Company Inc. | Exhaust aftertreatment system with ammonia gas generator |
US9702291B2 (en) | 2015-11-03 | 2017-07-11 | Tenneco Automotive Operating Company Inc. | Exhaust aftertreatment system with ammonia gas generator |
US9790830B2 (en) | 2015-12-17 | 2017-10-17 | Tenneco Automotive Operating Company Inc. | Exhaust after-treatment system including electrolysis generated H2 and NH3 |
US10036291B2 (en) | 2016-01-20 | 2018-07-31 | Tenneco Automotive Operating Company Inc. | Exhaust after-treatment system including ammonia and hydrogen generation |
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EP0381236A1 (en) * | 1989-02-02 | 1990-08-08 | Nippon Shokubai Kagaku Kogyo Co. Ltd. | Method of removing nitrogen oxides in exhaust gases from a diesel engine |
DE4230056A1 (en) * | 1992-09-08 | 1994-03-10 | Man Nutzfahrzeuge Ag | Atomizer device |
DE4441261A1 (en) * | 1994-11-19 | 1996-05-23 | Bosch Gmbh Robert | Device for the aftertreatment of exhaust gases from an internal combustion engine |
WO1998043732A1 (en) * | 1997-04-02 | 1998-10-08 | Clean Diesel Technologies, Inc. | REDUCING NOx EMISSIONS FROM AN ENGINE BY TEMPERATURE-CONTROLLED UREA INJECTION |
EP0826097B1 (en) * | 1995-05-19 | 1998-11-04 | Siemens Aktiengesellschaft | Pre-mixing chamber for an exhaust gas cleaning unit |
Family Cites Families (3)
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DE19653405C2 (en) * | 1996-12-20 | 1999-06-10 | Bosch Gmbh Robert | Mixture dispenser |
DE19750138A1 (en) * | 1997-11-12 | 1999-05-27 | Siemens Ag | Device for introducing a liquid reducing agent into an exhaust gas cleaning system |
DE19819579C1 (en) * | 1998-04-30 | 1999-09-30 | Siemens Ag | Secondary treatment of exhaust from lean burn diesel engine with SCR catalyst, minimizing pump usage and energy consumption |
-
1999
- 1999-10-01 DE DE19947198A patent/DE19947198B4/en not_active Expired - Fee Related
-
2000
- 2000-09-22 WO PCT/DE2000/003300 patent/WO2001025601A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0381236A1 (en) * | 1989-02-02 | 1990-08-08 | Nippon Shokubai Kagaku Kogyo Co. Ltd. | Method of removing nitrogen oxides in exhaust gases from a diesel engine |
DE4230056A1 (en) * | 1992-09-08 | 1994-03-10 | Man Nutzfahrzeuge Ag | Atomizer device |
DE4441261A1 (en) * | 1994-11-19 | 1996-05-23 | Bosch Gmbh Robert | Device for the aftertreatment of exhaust gases from an internal combustion engine |
EP0826097B1 (en) * | 1995-05-19 | 1998-11-04 | Siemens Aktiengesellschaft | Pre-mixing chamber for an exhaust gas cleaning unit |
WO1998043732A1 (en) * | 1997-04-02 | 1998-10-08 | Clean Diesel Technologies, Inc. | REDUCING NOx EMISSIONS FROM AN ENGINE BY TEMPERATURE-CONTROLLED UREA INJECTION |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8074673B2 (en) | 2004-05-18 | 2011-12-13 | Hydraulik-Ring Gmbh | Freeze-resistant metering valve |
US8266892B2 (en) | 2007-01-25 | 2012-09-18 | Friedrich Zapf | Calibrated dosing unit, especially of an exhaust gas treatment unit |
US8875491B2 (en) | 2007-01-25 | 2014-11-04 | Cummins Ltd. | Exhaust gas aftertreatment system and method |
US8201393B2 (en) | 2008-03-05 | 2012-06-19 | Hilite Germany Gmbh | Exhaust-gas aftertreatment device |
US8959895B2 (en) | 2008-03-05 | 2015-02-24 | Cummins Ltd. | Exhaust-gas aftertreatment device |
US8938949B2 (en) | 2009-08-03 | 2015-01-27 | Cummins Ltd. | SCR exhaust gas aftertreatment device |
US8875502B2 (en) | 2010-12-14 | 2014-11-04 | Cummins Ltd. | SCR exhaust gas aftertreatment device |
Also Published As
Publication number | Publication date |
---|---|
WO2001025601A1 (en) | 2001-04-12 |
DE19947198A1 (en) | 2001-04-05 |
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