JP2009047175A - 低温における排気後処理装置内での窒素酸化物の高効率変換 - Google Patents
低温における排気後処理装置内での窒素酸化物の高効率変換 Download PDFInfo
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- JP2009047175A JP2009047175A JP2008265205A JP2008265205A JP2009047175A JP 2009047175 A JP2009047175 A JP 2009047175A JP 2008265205 A JP2008265205 A JP 2008265205A JP 2008265205 A JP2008265205 A JP 2008265205A JP 2009047175 A JP2009047175 A JP 2009047175A
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- 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
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- 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
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1459—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being a hydrocarbon content or concentration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
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- 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
- F01N2370/00—Selection of materials for exhaust purification
- F01N2370/02—Selection of materials for exhaust purification used in catalytic reactors
- F01N2370/04—Zeolitic material
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- 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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/02—Catalytic activity of catalytic converters
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- 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
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/021—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting ammonia NH3
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- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/18—Ammonia
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- 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
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- 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
- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D2041/1468—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an ammonia content or concentration of the exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
- F02D41/1441—Plural sensors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
- F02D41/187—Circuit arrangements for generating control signals by measuring intake air flow using a hot wire flow sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/48—EGR valve position sensors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
【解決手段】リーン空燃比で動作する内燃エンジン10からの排気を受けるリーンNOx触媒30へ還元剤を供給するシステム及び方法である。還元剤の供給量は、触媒30に吸蔵された還元剤の量に基く。更に、還元剤は、触媒30上流の排気のNOx濃度が25 ppm未満であること又は、触媒の温度が300℃を越えることを含む予め定められた状態の下で、供給される。
【選択図】図1
Description
20 噴射弁
30 触媒
40 電子制御ユニット
Claims (10)
- 内燃エンジンに接続される触媒のNOx変換効率を向上させる方法であって、
上記触媒に吸蔵された還元剤の量を検出する工程、
上記量が第1の所定量未満である場合に、上記触媒の温度を所定温度よりも上げる動作状態を生成する工程、
を有する方法。 - 上記所定の温度が約300℃である、請求項1の方法。
- 内燃エンジンに接続される触媒のNOx変換効率を向上させる方法であって、
上記触媒に吸蔵された還元剤の量を検出する工程、
上記量が第1の所定量未満である場合に、エンジンから放出される排気のNOx濃度が所定濃度未満とするエンジン動作状態を生成する工程、
を有する方法。 - 上記所定の濃度が約25 ppmである、請求項3の方法。
- 上記第1の所定量が上記触媒に吸蔵される還元剤の微々たる量である、前記請求項1乃至4のいずれかに記載の方法。
- 理論空燃比よりもリーンで動作する燃焼室からの排気を受ける触媒におけるNOxの変換を高めるシステムであって、
上記触媒の上流で、上記燃焼室の下流に配置され、排気へ還元剤を供給する噴射弁、及び
上記噴射弁と上記燃焼室に連係されて動作し、周期的に上記燃焼室の第1の動作状態を生成し、該第1の動作状態の間上記噴射弁を駆動する電子制御ユニット、
を有するシステム。 - 上記触媒下流に、排気センサーを更に有する、請求項6のシステム。
- 上記排気センサーが上記電子制御ユニットに接続されて動作し、該電子制御ユニットが上記噴射弁の作動を上記排気酸素センサーからの信号に基礎を置く、請求項6又は7のシステム。
- 上記第1の動作状態が、上記触媒内の温度が300℃を越える様にすることを包含する、請求項6乃至8のいずれかに記載のシステム。
- 上記燃焼室が内燃エンジンの燃焼室である、請求項6乃至9のいずれかに記載のシステム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/682,242 US6928359B2 (en) | 2001-08-09 | 2001-08-09 | High efficiency conversion of nitrogen oxides in an exhaust aftertreatment device at low temperature |
US09/682,242 | 2001-08-09 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002233202A Division JP4565798B2 (ja) | 2001-08-09 | 2002-08-09 | 低温における排気後処理装置内での窒素酸化物の高効率変換 |
Publications (2)
Publication Number | Publication Date |
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JP2009047175A true JP2009047175A (ja) | 2009-03-05 |
JP4738465B2 JP4738465B2 (ja) | 2011-08-03 |
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Application Number | Title | Priority Date | Filing Date |
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JP2002233202A Expired - Fee Related JP4565798B2 (ja) | 2001-08-09 | 2002-08-09 | 低温における排気後処理装置内での窒素酸化物の高効率変換 |
JP2008265205A Expired - Fee Related JP4738465B2 (ja) | 2001-08-09 | 2008-10-14 | 低温における排気後処理装置内での窒素酸化物の高効率変換 |
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JP2002233202A Expired - Fee Related JP4565798B2 (ja) | 2001-08-09 | 2002-08-09 | 低温における排気後処理装置内での窒素酸化物の高効率変換 |
Country Status (4)
Country | Link |
---|---|
US (1) | US6928359B2 (ja) |
JP (2) | JP4565798B2 (ja) |
DE (1) | DE10233665C5 (ja) |
GB (1) | GB2381477B (ja) |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001303934A (ja) * | 1998-06-23 | 2001-10-31 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
US7093427B2 (en) * | 2002-11-21 | 2006-08-22 | Ford Global Technologies, Llc | Exhaust gas aftertreatment systems |
SE526404C2 (sv) * | 2004-01-20 | 2005-09-06 | Scania Cv Abp | Förfarande och anordning för styrning av insprutning av reduktionsmedel |
US7067319B2 (en) * | 2004-06-24 | 2006-06-27 | Cummins, Inc. | System for diagnosing reagent solution quality and emissions catalyst degradation |
DE102004031624A1 (de) * | 2004-06-30 | 2006-02-02 | Robert Bosch Gmbh | Verfahren zum Betreiben eines zur Reinigung des Abgases einer Brennkraftmaschine verwendeten Katalysators und Vorrichtung zur Durchführung des Verfahrens |
JP2006022729A (ja) * | 2004-07-08 | 2006-01-26 | Hino Motors Ltd | 排気浄化装置の制御方法 |
DE102004046640B4 (de) * | 2004-09-25 | 2013-07-11 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine und Vorrichtung zur Durchführung des Verfahrens |
DE102005063323A1 (de) * | 2005-06-02 | 2006-12-07 | Webasto Ag | Vorrichtung und Verfahren zur Reinigung von Abgasen eines Verbrennungsmotors |
DE102005048117A1 (de) * | 2005-10-06 | 2007-04-12 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Verfahren und Vorrichtung zur Reduktion des Stickoxidanteils im Abgas einer Verbrennungskraftmaschine |
DE102005062120B4 (de) * | 2005-12-23 | 2016-06-09 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Überwachung eines Abgasnachbehandlungssystems |
US7762060B2 (en) * | 2006-04-28 | 2010-07-27 | Caterpillar Inc. | Exhaust treatment system |
GB0614445D0 (en) * | 2006-07-20 | 2006-08-30 | Ricardo Uk Ltd | Control of selective catalytic reduction |
US20080078170A1 (en) * | 2006-09-29 | 2008-04-03 | Gehrke Christopher R | Managing temperature in an exhaust treatment system |
JP4912189B2 (ja) * | 2007-03-14 | 2012-04-11 | Udトラックス株式会社 | エンジンの排気浄化装置 |
WO2009036780A1 (de) * | 2007-09-18 | 2009-03-26 | Fev Motorentechnik Gmbh | Nh3 -überwachung eines s cr- katalysators |
FR2922594A1 (fr) * | 2007-10-23 | 2009-04-24 | Peugeot Citroen Automobiles Sa | Procede de gestion d'injection d'uree dans un systeme a reduction catalytique selective |
JP4986839B2 (ja) * | 2007-12-27 | 2012-07-25 | 日野自動車株式会社 | 排気処理装置 |
FR2925935B1 (fr) * | 2008-01-02 | 2010-01-15 | Peugeot Citroen Automobiles Sa | Procede et systeme de gestion de l'injection d'agent reducteur dans un systeme scr. |
JP4844572B2 (ja) * | 2008-01-23 | 2011-12-28 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
DE102008030755A1 (de) * | 2008-06-27 | 2009-12-31 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Verfahren zur Zugabe eines Reaktionsmittels zum Abgassystem einer mobilen Verbrennungskraftmaschine |
US8343448B2 (en) * | 2008-09-30 | 2013-01-01 | Ford Global Technologies, Llc | System for reducing NOx in exhaust |
KR101040347B1 (ko) * | 2008-12-05 | 2011-06-10 | 현대자동차주식회사 | 디젤차량에서 scr의 전환효율 계산장치 및 방법 |
JP5251596B2 (ja) * | 2009-02-26 | 2013-07-31 | マツダ株式会社 | 排気ガス浄化装置 |
FR2952673B1 (fr) * | 2009-11-17 | 2013-08-30 | Peugeot Citroen Automobiles Sa | Procede de controle des emissions polluantes d'un moteur a combustion |
JP5067445B2 (ja) * | 2010-06-11 | 2012-11-07 | トヨタ自動車株式会社 | 車両用制御装置および車両用制御方法 |
US8800274B2 (en) * | 2011-05-12 | 2014-08-12 | GM Global Technology Operations LLC | Method for managing ammonia slip |
JP2013189900A (ja) * | 2012-03-13 | 2013-09-26 | Isuzu Motors Ltd | 排気ガス浄化装置 |
US9964058B2 (en) * | 2012-04-03 | 2018-05-08 | Ford Global Technologies, Llc | System and method for increasing fuel economy of a vehicle including a SCR catalyst |
JP5915516B2 (ja) | 2012-12-25 | 2016-05-11 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999055446A1 (en) * | 1998-04-28 | 1999-11-04 | Johnson Matthey Public Limited Company | Process and apparatus for reducing the nitrogen oxide content in exhaust gases by the controlled addition of nh3 |
Family Cites Families (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4403476A (en) | 1981-11-02 | 1983-09-13 | General Electric Company | Method for operating a steam turbine with an overload valve |
CA1298957C (en) | 1987-01-27 | 1992-04-21 | Motonobu Kobayashi | Method for removal of nitrogen oxides from exhaust gas of diesel engine |
US5201802A (en) | 1991-02-04 | 1993-04-13 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification system for an internal combustion engine |
US5609026A (en) | 1991-05-16 | 1997-03-11 | Kleenair Systems, Inc. | Engine NOx reduction |
DE4117143C2 (de) * | 1991-05-25 | 1995-04-20 | Daimler Benz Ag | Verfahren zur selektiven katalytischen Reduktion von Stickoxiden in Abgasen aus Kraftfahrzeugdieselmotoren |
DE4203219A1 (de) * | 1992-02-05 | 1993-08-12 | Basf Ag | Verfahren zur stickoxidminderung in abgasen durch gesteuerte nh(pfeil abwaerts)3(pfeil abwaerts)-zugabe |
DE4217552C1 (ja) | 1992-05-27 | 1993-08-19 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
DE4315278A1 (de) | 1993-05-07 | 1994-11-10 | Siemens Ag | Verfahren und Einrichtung zur Dosierung eines Reduktionsmittels in ein stickoxidhaltiges Abgas |
DE4334071C1 (de) | 1993-10-06 | 1995-02-09 | Siemens Ag | Verfahren zur Verminderung der Stickoxidkonzentration im Abgas einer Brennkraftmaschine oder einer Verbrennungsanlage |
US5657625A (en) | 1994-06-17 | 1997-08-19 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Apparatus and method for internal combustion engine control |
WO1996004980A1 (de) | 1994-08-10 | 1996-02-22 | Siemens Aktiengesellschaft | Verfahren zur katalytischen umsetzung von im abgas eines verbrennungsmotors enthaltenen stickoxiden |
US5522218A (en) | 1994-08-23 | 1996-06-04 | Caterpillar Inc. | Combustion exhaust purification system and method |
US5609022A (en) | 1994-10-31 | 1997-03-11 | General Motors Corporation | Method of reducing NOx emissions from lean-burn combustion engines |
ATE177509T1 (de) | 1995-09-29 | 1999-03-15 | Siemens Ag | Verfahren und vorrichtung zur umsetzung eines schadstoffes in einem abgas an einem katalysator |
AU696257B2 (en) * | 1995-11-09 | 1998-09-03 | Toyota Jidosha Kabushiki Kaisha | Method and device for purifying exhaust gas of engine |
DE19629163C1 (de) | 1996-07-19 | 1997-10-09 | Daimler Benz Ag | Verfahren und Vorrichtung zum stickoxidemissionsarmen Betrieb eines Verbrennungsmotors |
US5924280A (en) | 1997-04-04 | 1999-07-20 | Clean Diesel Technologies, Inc. | Reducing NOx emissions from an engine while maximizing fuel economy |
DE19721440A1 (de) | 1997-05-21 | 1998-11-26 | Degussa | Verfahren zur Reinigung eines mageren Abgases und Katalysatorsystem hierfür |
DE19743337C1 (de) | 1997-09-30 | 1999-01-07 | Siemens Ag | NOx-Reduktionssystem mit einer Einrichtung zur Reduktionsmitteldosierung |
DE19749400C2 (de) * | 1997-11-07 | 2001-11-29 | Siemens Ag | Verfahren zur Verringerung des NOX-Gehaltes im Abgas einer Dieselbrennkraftmaschine |
US6125629A (en) | 1998-11-13 | 2000-10-03 | Engelhard Corporation | Staged reductant injection for improved NOx reduction |
US6119451A (en) | 1999-04-20 | 2000-09-19 | Regents Of The University Of California | Nitrogen oxide removal using diesel fuel and a catalyst |
US6182444B1 (en) | 1999-06-07 | 2001-02-06 | Ford Global Technologies, Inc. | Emission control system |
US6295809B1 (en) | 1999-07-12 | 2001-10-02 | Ford Global Technologies, Inc. | Emission control system with a catalyst |
DE10041891B4 (de) | 1999-10-11 | 2013-02-28 | Daimler Ag | Verfahren zum Betreiben einer Abgasreinigungsanlage mit interner Reduktionsmittelerzeugung |
US6167698B1 (en) * | 1999-12-21 | 2001-01-02 | Ford Motor Company | Exhaust gas purification system for a lean burn engine |
JP3508744B2 (ja) * | 2000-07-24 | 2004-03-22 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
DE10113947B4 (de) | 2001-03-22 | 2004-03-25 | Daimlerchrysler Ag | Verfahren zur Verringerung des Stickoxidgehalts im Abgas einer im Mager-Fett-Wechsel betreibbaren Brennkraftmaschine |
US6698191B2 (en) * | 2001-08-09 | 2004-03-02 | Ford Global Technologies, Llc | High efficiency conversion of nitrogen oxides in an exhaust aftertreatment device at low temperature |
US6742326B2 (en) * | 2001-08-09 | 2004-06-01 | Ford Global Technologies, Llc | High efficiency conversion of nitrogen oxides in an exhaust aftertreatment device at low temperature |
US6421599B1 (en) * | 2001-08-09 | 2002-07-16 | Ford Global Technologies, Inc. | Control strategy for an internal combustion engine in a hybrid vehicle |
US20030118960A1 (en) * | 2001-12-21 | 2003-06-26 | Balmer-Millar Mari Lou | Lean NOx aftertreatment system |
-
2001
- 2001-08-09 US US09/682,242 patent/US6928359B2/en not_active Expired - Lifetime
-
2002
- 2002-06-24 GB GB0214480A patent/GB2381477B/en not_active Expired - Fee Related
- 2002-07-24 DE DE10233665A patent/DE10233665C5/de not_active Expired - Fee Related
- 2002-08-09 JP JP2002233202A patent/JP4565798B2/ja not_active Expired - Fee Related
-
2008
- 2008-10-14 JP JP2008265205A patent/JP4738465B2/ja not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999055446A1 (en) * | 1998-04-28 | 1999-11-04 | Johnson Matthey Public Limited Company | Process and apparatus for reducing the nitrogen oxide content in exhaust gases by the controlled addition of nh3 |
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Publication number | Publication date |
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GB2381477A (en) | 2003-05-07 |
JP4565798B2 (ja) | 2010-10-20 |
US20030036841A1 (en) | 2003-02-20 |
GB0214480D0 (en) | 2002-08-07 |
JP2003138932A (ja) | 2003-05-14 |
US6928359B2 (en) | 2005-08-09 |
DE10233665A1 (de) | 2003-02-27 |
GB2381477B (en) | 2005-04-06 |
JP4738465B2 (ja) | 2011-08-03 |
DE10233665B4 (de) | 2005-11-10 |
DE10233665C5 (de) | 2013-10-10 |
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