JP4152833B2 - エンジンの排気浄化装置 - Google Patents
エンジンの排気浄化装置 Download PDFInfo
- Publication number
- JP4152833B2 JP4152833B2 JP2003282359A JP2003282359A JP4152833B2 JP 4152833 B2 JP4152833 B2 JP 4152833B2 JP 2003282359 A JP2003282359 A JP 2003282359A JP 2003282359 A JP2003282359 A JP 2003282359A JP 4152833 B2 JP4152833 B2 JP 4152833B2
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- Prior art keywords
- reducing agent
- nozzle
- pressure
- compressed air
- air
- 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 - Lifetime
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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]
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- 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
-
- 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
- F01N2610/1493—Purging the reducing agent out of the conduits or nozzle
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Biomedical Technology (AREA)
- Combustion & Propulsion (AREA)
- Toxicology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
このようになると、その後に液体還元剤の噴射を再開しても、必要量の液体還元剤が窒素酸化物還元触媒に供給されず、排気中の窒素酸化物が充分に還元されずに大気中に放出されてしまう恐れがあるという問題点があった。
また、エアリザーバタンクに貯留される圧縮空気が減圧されて液体還元剤と混合し、液体還元剤が噴霧状態になって排気通路内に噴射されるので、窒素酸化物還元触媒に液体還元剤が略均一に供給される。
更に、エアリザーバタンクに貯留される圧縮空気が、ノズル内部に所定時間供給される高圧空気として、減圧後の圧縮空気よりも高い圧力で使用される。
また、窒素酸化物還元触媒に液体還元剤が略均一に供給されるので、窒素酸化物還元触媒における排気中の窒素酸化物の還元除去を効率よく行なうことができる。
更に、エアリザーバタンクに貯留される圧縮空気を、高圧空気供給手段において使用する高圧空気として利用することができる。
なお、本実施例においては、電磁開閉弁6、還元剤添加装置8、還元剤タンク9、運転状態検出センサ13及びコントローラ14により還元剤噴射手段が構成されると共に、コントローラ14により高圧空気供給手段が、減圧弁30により減圧手段が構成される。
2 排気管
3 窒素酸化物還元触媒
4 ノズル
5 エアリザーバタンク
6 電磁開閉弁
7 減圧弁
8 還元剤添加装置
9 還元剤タンク
11 パージ用エアタンク
12 電磁開閉弁
13 運転状態検出センサ
14 コントローラ
30 減圧弁
Claims (2)
- 液体還元剤を用いて排気中の窒素酸化物を還元除去すべく、エンジンの排気通路に介装された窒素酸化物還元触媒と、
前記窒素酸化物還元触媒上流の排気通路内に噴孔が開口するノズルと、
エンジン運転状態に基づいて、前記ノズルの噴孔から排気通路内に液体還元剤を噴射する還元剤噴射手段と、
前記還元剤噴射手段による液体還元剤の噴射流量が0となったときに、前記ノズル内部に高圧空気を所定時間供給して、前記ノズル内部の液体還元剤を排出させる高圧空気供給手段と、
圧縮空気を貯留するエアリザーバタンクと、
を含んで構成され、
前記還元剤噴射手段は、前記エアリザーバタンクに貯留される圧縮空気を所定圧力に減圧し、減圧後の圧縮空気を液体還元剤と混合して噴霧状態とした後、前記ノズルの噴孔から排気通路内に噴射し、
前記高圧空気供給手段は、前記エアリザーバタンクに貯留される圧縮空気を前記高圧空気として、前記減圧後の圧縮空気よりも高い圧力で前記ノズル内部に供給することを特徴とするエンジンの排気浄化装置。 - 液体還元剤を用いて排気中の窒素酸化物を還元除去すべく、エンジンの排気通路に介装された窒素酸化物還元触媒と、
前記窒素酸化物還元触媒上流の排気通路内に噴孔が開口するノズルと、
エンジン運転状態に基づいて、前記ノズルの噴孔から排気通路内に液体還元剤を噴射する還元剤噴射手段と、
前記還元剤噴射手段による液体還元剤の噴射流量が0となったときに、前記ノズル内部に高圧空気を所定時間供給して、前記ノズル内部の液体還元剤を排出させる高圧空気供給手段と、
圧縮空気を貯留するエアリザーバタンクと、
前記エアリザーバタンクに貯留される圧縮空気を、そのまま通過させるか又は所定圧力に減圧させて通過させるかを切換可能な減圧手段と、
を含んで構成され、
前記還元剤噴射手段は、前記減圧手段により減圧させた圧縮空気を液体還元剤と混合して噴霧状態とした後、前記ノズルの噴孔から排気通路内に噴射し、
前記高圧空気供給手段は、前記減圧手段をそのまま通過させた圧縮空気を前記高圧空気として、前記減圧後の圧縮空気よりも高い圧力で前記ノズル内部に供給することを特徴とするエンジンの排気浄化装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003282359A JP4152833B2 (ja) | 2003-07-30 | 2003-07-30 | エンジンの排気浄化装置 |
CNB2004800217588A CN100432385C (zh) | 2003-07-30 | 2004-07-23 | 发动机的排气净化装置 |
US10/566,367 US7571599B2 (en) | 2003-07-30 | 2004-07-23 | Exhaust gas purification apparatus of engine |
EP04747873.0A EP1655463B1 (en) | 2003-07-30 | 2004-07-23 | Exhaust gas purification apparatus of engine |
PCT/JP2004/010487 WO2005012702A1 (ja) | 2003-07-30 | 2004-07-23 | エンジンの排気浄化装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003282359A JP4152833B2 (ja) | 2003-07-30 | 2003-07-30 | エンジンの排気浄化装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005048677A JP2005048677A (ja) | 2005-02-24 |
JP4152833B2 true JP4152833B2 (ja) | 2008-09-17 |
Family
ID=34113775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003282359A Expired - Lifetime JP4152833B2 (ja) | 2003-07-30 | 2003-07-30 | エンジンの排気浄化装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7571599B2 (ja) |
EP (1) | EP1655463B1 (ja) |
JP (1) | JP4152833B2 (ja) |
CN (1) | CN100432385C (ja) |
WO (1) | WO2005012702A1 (ja) |
Families Citing this family (35)
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JP2005105970A (ja) * | 2003-09-30 | 2005-04-21 | Nissan Diesel Motor Co Ltd | エンジンの排気浄化装置 |
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JP4592504B2 (ja) * | 2005-06-09 | 2010-12-01 | 三菱ふそうトラック・バス株式会社 | 排気浄化装置 |
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JP4650241B2 (ja) * | 2005-11-30 | 2011-03-16 | トヨタ自動車株式会社 | 内燃機関の排気システム |
SE529591C2 (sv) * | 2006-02-08 | 2007-09-25 | Stt Emtec Ab | Insprutningsanordning |
JP4684150B2 (ja) * | 2006-03-30 | 2011-05-18 | 三菱ふそうトラック・バス株式会社 | エア回路の制御装置 |
US20080034733A1 (en) * | 2006-08-14 | 2008-02-14 | Miller Robert L | Fuel supply component purging system |
US8499739B2 (en) | 2006-08-31 | 2013-08-06 | Caterpillar Inc. | Injector having tangentially oriented purge line |
WO2008056417A1 (fr) * | 2006-11-09 | 2008-05-15 | Nissan Diesel Motor Co., Ltd. | Détecteur de température d'air ambiant et appareil de purification d'échappement |
US8006482B2 (en) | 2007-03-02 | 2011-08-30 | Caterpillar Inc. | Method of purging fluid injector by heating |
US8215100B2 (en) | 2007-03-02 | 2012-07-10 | Caterpillar Inc. | Regeneration device having external check valve |
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JP4174685B1 (ja) * | 2007-05-31 | 2008-11-05 | 三菱自動車工業株式会社 | 内燃機関の排気浄化装置 |
US7958721B2 (en) | 2007-06-29 | 2011-06-14 | Caterpillar Inc. | Regeneration system having integral purge and ignition device |
US8281570B2 (en) * | 2007-08-09 | 2012-10-09 | Caterpillar Inc. | Reducing agent injector having purge heater |
ATE538288T1 (de) * | 2007-12-21 | 2012-01-15 | Renault Trucks | Vorrichtung zum einspritzen eines fluids für eine abgasbehandlungsvorrichtung |
US20100154387A1 (en) * | 2008-12-19 | 2010-06-24 | Toyota Jidosha Kabushiki Kaisha | Abnormality detection device for reductant addition valve |
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SE536318C2 (sv) * | 2010-06-21 | 2013-08-20 | Scania Cv Ab | Förfarande och anordning för att avlägsna reduktionsmedel ur en doseringsenhet vid ett SCR-system |
SE537642C2 (sv) * | 2010-06-21 | 2015-09-08 | Scania Cv Ab | Förfarande och anordning vid kylning av en doseringsenhet för reduktionsmedel |
WO2012063530A1 (ja) * | 2010-11-08 | 2012-05-18 | ボッシュ株式会社 | 還元剤噴射弁の異常判定装置及び還元剤供給装置 |
JP5586446B2 (ja) * | 2010-12-16 | 2014-09-10 | Udトラックス株式会社 | エンジンの排気管噴射装置 |
JP5906637B2 (ja) * | 2011-09-28 | 2016-04-20 | いすゞ自動車株式会社 | 異物除去方法及び選択還元触媒システム |
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-
2003
- 2003-07-30 JP JP2003282359A patent/JP4152833B2/ja not_active Expired - Lifetime
-
2004
- 2004-07-23 WO PCT/JP2004/010487 patent/WO2005012702A1/ja active Application Filing
- 2004-07-23 EP EP04747873.0A patent/EP1655463B1/en active Active
- 2004-07-23 US US10/566,367 patent/US7571599B2/en active Active
- 2004-07-23 CN CNB2004800217588A patent/CN100432385C/zh active Active
Also Published As
Publication number | Publication date |
---|---|
CN100432385C (zh) | 2008-11-12 |
EP1655463A1 (en) | 2006-05-10 |
EP1655463A4 (en) | 2009-12-23 |
EP1655463B1 (en) | 2016-07-06 |
CN1839252A (zh) | 2006-09-27 |
JP2005048677A (ja) | 2005-02-24 |
US7571599B2 (en) | 2009-08-11 |
US20070186542A1 (en) | 2007-08-16 |
WO2005012702A1 (ja) | 2005-02-10 |
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