JP2007255342A - NOx浄化システムの制御方法及びNOx浄化システム - Google Patents
NOx浄化システムの制御方法及びNOx浄化システム Download PDFInfo
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- JP2007255342A JP2007255342A JP2006082200A JP2006082200A JP2007255342A JP 2007255342 A JP2007255342 A JP 2007255342A JP 2006082200 A JP2006082200 A JP 2006082200A JP 2006082200 A JP2006082200 A JP 2006082200A JP 2007255342 A JP2007255342 A JP 2007255342A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9495—Controlling the catalytic process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9431—Processes characterised by a specific device
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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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
-
- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
- F01N3/0885—Regeneration of deteriorated absorbents or adsorbents, e.g. desulfurization of NOx traps
-
- 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
- F02D41/028—Desulfurisation of NOx traps or adsorbent
-
- 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
- F01N2550/03—Monitoring or diagnosing the deterioration of exhaust systems of sorbing activity of adsorbents or absorbents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—Exhaust gas treatment apparatus parameters
- F02D2200/0814—Oxygen storage amount
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—Exhaust gas treatment apparatus parameters
- F02D2200/0818—SOx storage amount, e.g. for SOx trap or NOx trap
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
【解決手段】NOx吸蔵還元型触媒22と、NOx再生制御と硫黄被毒再生制御とを行う制御装置30を備えたNOx浄化システム1の制御方法において、NOx再生制御のリッチ空燃比状態の終了直後にNOx吸蔵還元型触媒22に吸着及び吸蔵される酸素量を基にして、NOx吸蔵還元型触媒22の硫黄被毒による劣化度合を推定する。
【選択図】図2
Description
この吸着及び吸蔵される酸素吸着量は、t5〜t8の間のλinとλoutで囲まれる部分(斜線部)Aに関係する。このλinとλoutの差の積算値Aを酸素濃度に換算し,排気ガス量を乗じると酸素吸着量Vaが得られる。触媒の硫黄被毒による劣化度合が進捗するに連れて、この酸素吸着量Vaは減少する。つまり、硫黄被毒は触媒への強い硫黄の吸着及び吸蔵で生じるため、硫黄被毒が進捗している触媒では酸素の吸着、吸蔵活性点が消滅し、酸素吸着が減少するので、この現象が生じる。この酸素吸着量Va又は積算値Aを基に、触媒の硫黄被毒による劣化度合を推定し評価する。
1 NOx浄化システム
3 排気通路
20 排気ガス浄化装置(触媒コンバーター)
21 酸化触媒
22 吸蔵還元型触媒
23 入口側空気過剰率センサ
24 出口側空気過剰率センサ
30 制御装置
A 入口側空気過剰率と出口側空気過剰率の差の積算値
Va 酸素吸着量(吸着及び吸蔵される酸素量)
λin 入口側空気過剰率
λout 出口側空気過剰率
Δta 復帰時間差
Claims (5)
- 内燃機関の排気通路に、排気ガスの空燃比が、リーン状態の場合にNOxを吸蔵し、かつ、リッチ状態の場合に吸蔵していたNOxを放出すると共に還元するNOx吸蔵還元型触媒を備えると共に、該NOx吸蔵還元型触媒のNOx吸蔵能力を回復するために排気ガスの空燃比をリッチ空燃比状態にするNOx再生制御と、該NOx吸蔵還元型触媒の硫黄被毒による触媒劣化を回復するために排気ガスの空燃比をリッチ空燃比にする硫黄被毒再生制御とを行うNOx浄化システムの制御方法において、
前記NOx再生制御のリッチ空燃比状態の終了直後に前記NOx吸蔵還元型触媒に吸着及び吸蔵される酸素量を基にして、前記NOx吸蔵還元型触媒の硫黄被毒による劣化度合を推定することを特徴とするNOx浄化システムの制御方法。 - 前記NOx再生制御のリッチ空燃比状態の終了直後において、前記吸着及び吸蔵される酸素量の代りに、前記NOx吸蔵還元型触媒の出口側の酸素濃度と前記NOx吸蔵還元型触媒の入口側の酸素濃度の差の積算値から、前記NOx吸蔵還元型触媒の硫黄被毒による劣化度合を推定することを特徴とする請求項1記載のNOx浄化システムの制御方法。
- 前記NOx再生制御のリッチ空燃比状態の終了直後において、前記吸着及び吸蔵される酸素量、酸素濃度の差の積算値、前記NOx吸蔵還元型触媒の出口側の酸素濃度がリーン空燃比状態に復帰する時間と前記NOx吸蔵還元型触媒の入口側の酸素濃度がリーン空燃比状態に復帰する時間との差である復帰時間差の内の少なくとも一つの判定用の値を前記硫黄被毒再生制御の開始の判定に用いて、該判定用の値が所定の判定値より小さくなった場合に、前記硫黄被毒再生制御を開始することを特徴とする請求項1又は2に記載のNOx浄化システムの制御方法。
- 内燃機関の排気通路に、排気ガスの空燃比が、リーン状態の場合にNOxを吸蔵し、かつ、リッチ状態の場合に吸蔵していたNOxを放出すると共に還元するNOx吸蔵還元型触媒を備えると共に、該NOx吸蔵還元型触媒のNOx吸蔵能力を回復するために排気ガスの空燃比をリッチ空燃比状態にするNOx再生制御と、該NOx吸蔵還元型触媒の硫黄被毒による触媒劣化を回復するために排気ガスの空燃比をリッチ空燃比にする硫黄被毒再生制御とを行う制御装置を備えたNOx浄化システムにおいて、
前記制御装置が、前記NOx再生制御のリッチ空燃比状態の終了直後の前記NOx吸蔵還元型触媒に吸着及び吸蔵される酸素量を基にして、前記NOx吸蔵還元型触媒の硫黄被毒による劣化度合を推定することを特徴とするNOx浄化システム。 - 前記制御装置が、前記NOx再生制御のリッチ空燃比状態の終了直後において、前記吸着及び吸蔵される酸素量、酸素濃度の差の積算値、前記NOx吸蔵還元型触媒の出口側の酸素濃度がリーン空燃比状態に復帰する時間と前記NOx吸蔵還元型触媒の入口側の酸素濃度がリーン空燃比状態に復帰する時間との差である復帰時間差の内の少なくとも一つの判定用の値を前記硫黄被毒再生制御の開始の判定に用いて、該判定用の値が所定の判定値より小さくなった場合に、前記硫黄被毒再生制御を開始することを特徴とする請求項4に記載のNOx浄化システム。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006082200A JP5217102B2 (ja) | 2006-03-24 | 2006-03-24 | NOx浄化システムの制御方法及びNOx浄化システム |
US12/224,490 US8051642B2 (en) | 2006-03-24 | 2006-11-22 | Method of controlling NOx purification system and NOx purification system |
EP06833118.0A EP2000196B1 (en) | 2006-03-24 | 2006-11-22 | METHOD OF CONTROLLING NOx PURIFICATION SYSTEM AND NOx PURIFICATION SYSTEM |
PCT/JP2006/323296 WO2007110997A1 (ja) | 2006-03-24 | 2006-11-22 | NOx浄化システムの制御方法及びNOx浄化システム |
CN2006800539909A CN101405071B (zh) | 2006-03-24 | 2006-11-22 | NOx净化系统的控制方法及NOx净化系统 |
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JP2006082200A JP5217102B2 (ja) | 2006-03-24 | 2006-03-24 | NOx浄化システムの制御方法及びNOx浄化システム |
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JP2007255342A true JP2007255342A (ja) | 2007-10-04 |
JP5217102B2 JP5217102B2 (ja) | 2013-06-19 |
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JP2006082200A Expired - Fee Related JP5217102B2 (ja) | 2006-03-24 | 2006-03-24 | NOx浄化システムの制御方法及びNOx浄化システム |
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US (1) | US8051642B2 (ja) |
EP (1) | EP2000196B1 (ja) |
JP (1) | JP5217102B2 (ja) |
CN (1) | CN101405071B (ja) |
WO (1) | WO2007110997A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2927944A1 (fr) * | 2008-02-26 | 2009-08-28 | Renault Sas | Procede de commande de purge en oxydes de soufre d'un pot catalytique |
FR2927945A1 (fr) * | 2008-02-26 | 2009-08-28 | Renault Sas | Procede de commande de purge en oxydes de soufre d'un pot catalytique. |
JP2010209768A (ja) * | 2009-03-09 | 2010-09-24 | Honda Motor Co Ltd | 内燃機関の排ガス浄化装置 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5060378B2 (ja) * | 2008-04-23 | 2012-10-31 | 大阪瓦斯株式会社 | ガス分析方法及びガス分析装置 |
EP2543854B1 (en) * | 2010-03-02 | 2014-04-30 | Toyota Jidosha Kabushiki Kaisha | Control device for internal combustion engine |
KR101251519B1 (ko) * | 2010-12-02 | 2013-04-05 | 현대자동차주식회사 | 질소산화물 저감 촉매에 저장되는 황산화물의 양을 예측하는 방법 및 이를 이용한 배기 장치 |
KR101251505B1 (ko) | 2010-12-02 | 2013-04-05 | 현대자동차주식회사 | 질소산화물 저감 촉매에 저장되는 질소산화물의 양을 예측하는 방법 및 이를 이용한 배기 장치 |
KR101189241B1 (ko) | 2010-12-02 | 2012-10-09 | 현대자동차주식회사 | 질소산화물 저감 촉매의 재생 예측 방법 및 이를 이용한 배기 장치 |
CN103939186B (zh) * | 2013-01-23 | 2018-08-07 | 罗伯特·博世技术与业务解决方案公司 | 用于调节车辆中的废气催化器的再生频率的方法和装置 |
JP2016061144A (ja) * | 2014-09-12 | 2016-04-25 | いすゞ自動車株式会社 | 排気浄化システム及び、その制御方法 |
DE102017200145B4 (de) * | 2016-01-22 | 2021-12-23 | Ford Global Technologies, Llc | Verfahren zur Überwachung einer Abgasnachbehandlungsanlage, insbesondere eines NOx-Speicher-Katalysators sowie Steuerungseinrichtung für eine Abgasnachbehandlungsanlage und Fahrzeug |
Citations (3)
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JP2004257324A (ja) * | 2003-02-26 | 2004-09-16 | Nissan Motor Co Ltd | 内燃機関の排気浄化装置 |
JP2007170337A (ja) * | 2005-12-26 | 2007-07-05 | Denso Corp | 内燃機関の排気浄化装置 |
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JP3334632B2 (ja) | 1998-08-05 | 2002-10-15 | 三菱自動車工業株式会社 | 内燃機関の排気浄化装置 |
JP2000352307A (ja) | 1999-06-10 | 2000-12-19 | Hitachi Ltd | エンジン排気浄化装置 |
JP2002364428A (ja) | 2001-06-01 | 2002-12-18 | Toyota Motor Corp | 触媒劣化判定装置 |
JP3815386B2 (ja) | 2002-02-08 | 2006-08-30 | トヨタ自動車株式会社 | 触媒劣化判定方法 |
JP2004051662A (ja) | 2002-07-16 | 2004-02-19 | Shin Etsu Polymer Co Ltd | 熱可塑性樹脂組成物 |
JP4178864B2 (ja) | 2002-07-29 | 2008-11-12 | マツダ株式会社 | 内燃機関の排気浄化装置 |
JP4096716B2 (ja) | 2002-11-26 | 2008-06-04 | トヨタ自動車株式会社 | 触媒劣化判定装置 |
-
2006
- 2006-03-24 JP JP2006082200A patent/JP5217102B2/ja not_active Expired - Fee Related
- 2006-11-22 EP EP06833118.0A patent/EP2000196B1/en not_active Expired - Fee Related
- 2006-11-22 CN CN2006800539909A patent/CN101405071B/zh not_active Expired - Fee Related
- 2006-11-22 WO PCT/JP2006/323296 patent/WO2007110997A1/ja active Application Filing
- 2006-11-22 US US12/224,490 patent/US8051642B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH11324654A (ja) * | 1998-04-14 | 1999-11-26 | Degussa Huels Ag | 窒素酸化物吸蔵触媒の性能劣化を評価する方法 |
JP2004257324A (ja) * | 2003-02-26 | 2004-09-16 | Nissan Motor Co Ltd | 内燃機関の排気浄化装置 |
JP2007170337A (ja) * | 2005-12-26 | 2007-07-05 | Denso Corp | 内燃機関の排気浄化装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2927944A1 (fr) * | 2008-02-26 | 2009-08-28 | Renault Sas | Procede de commande de purge en oxydes de soufre d'un pot catalytique |
FR2927945A1 (fr) * | 2008-02-26 | 2009-08-28 | Renault Sas | Procede de commande de purge en oxydes de soufre d'un pot catalytique. |
JP2010209768A (ja) * | 2009-03-09 | 2010-09-24 | Honda Motor Co Ltd | 内燃機関の排ガス浄化装置 |
Also Published As
Publication number | Publication date |
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WO2007110997A1 (ja) | 2007-10-04 |
CN101405071B (zh) | 2013-02-13 |
EP2000196A2 (en) | 2008-12-10 |
JP5217102B2 (ja) | 2013-06-19 |
EP2000196A9 (en) | 2009-03-04 |
US20090044516A1 (en) | 2009-02-19 |
CN101405071A (zh) | 2009-04-08 |
EP2000196B1 (en) | 2013-08-28 |
EP2000196A4 (en) | 2010-11-03 |
US8051642B2 (en) | 2011-11-08 |
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