JP6107748B2 - 還元剤添加装置 - Google Patents
還元剤添加装置 Download PDFInfo
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- JP6107748B2 JP6107748B2 JP2014127026A JP2014127026A JP6107748B2 JP 6107748 B2 JP6107748 B2 JP 6107748B2 JP 2014127026 A JP2014127026 A JP 2014127026A JP 2014127026 A JP2014127026 A JP 2014127026A JP 6107748 B2 JP6107748 B2 JP 6107748B2
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- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
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- 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]
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- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
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- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
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- 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]
- F01N3/2073—Selective catalytic reduction [SCR] with means for generating a reducing substance from the exhaust gases
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- F01N9/00—Electrical control of exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/30—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel reformer
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- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/38—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an ozone (O3) generator, e.g. for adding ozone after generation of ozone from air
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- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- 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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- 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
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
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- 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
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1602—Temperature of exhaust gas apparatus
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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
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- Y02T10/12—Improving ICE efficiencies
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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
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Description
また開示される発明のひとつは、内燃機関(10)の排気に含まれるNOxを還元触媒上で浄化するNOx浄化装置(15)が排気通路(10ex)に備えられた燃焼システムに設けられ、排気通路のうち還元触媒の上流側へ還元剤を添加する還元剤添加装置である。kの還元剤添加装置は、還元剤を酸素により部分的に酸化させる反応室(30a、30b)を内部に形成する反応容器(30)を有し、還元剤を部分的に酸化させて改質する改質手段(30、50)と、還元触媒の活性化温度以上に設定された所定温度(T1)より還元触媒が高温である場合に、所定温度より還元触媒が低温である場合に比べて改質を抑制、または改質を停止させる改質制限手段(S54、S55)と、反応室へ供給される還元剤と空気の比率である当量比を、所定の当量比範囲に調整する当量比調整手段(S40)と、反応室の温度を所定の温度範囲に調整する温度調整手段(S30)と、を備え、当量比範囲および温度範囲は、反応室内の還元剤が空気中の酸素により部分的に酸化される冷炎反応が生じるように設定されており、改質制限手段は、反応室へ供給する酸素を減少またはゼロにすることで、改質を抑制または停止させることを特徴とする。
図1に示す燃焼システムは、以下に詳述する内燃機関10、過給機11、微粒子捕集装置(DPF14)、DPF再生装置(再生用DOC14a)、NOx浄化装置15、還元剤浄化装置(浄化用DOC16)および還元剤添加装置を備える。燃焼システムは車両に搭載されたものであり、当該車両は、内燃機関10の出力を駆動源として走行する。内燃機関10は、圧縮自着火式のディーゼルエンジンであり、燃焼に用いる燃料には軽油を用いている。
図1に示す実施形態では、エアポンプ20pにより放電リアクタ20へ空気を供給している。これに対し、図18に示す本実施形態では、内燃機関10の吸気の一部を分岐させて放電リアクタ20へ流入させる。
図1および図18に示す実施形態では、放電リアクタ20を備えることにより、反応容器30へオゾンを供給している。これに対し、図19に示す本実施形態では、放電リアクタ20を廃止している。そして、上記第1実施形態に係る図12の制御を、図20に示す制御に変更している。
以上、発明の好ましい実施形態について説明したが、発明は上述した実施形態に何ら制限されることなく、以下に例示するように種々変形して実施することが可能である。各実施形態で具体的に組合せが可能であることを明示している部分同士の組合せばかりではなく、特に組合せに支障が生じなければ、明示してなくとも実施形態同士を部分的に組み合せることも可能である。
Claims (6)
- 内燃機関(10)の排気に含まれるNOxを還元触媒上で浄化するNOx浄化装置(15)が排気通路(10ex)に備えられた燃焼システムに設けられ、前記排気通路のうち前記還元触媒の上流側へ還元剤を添加する還元剤添加装置において、
前記還元剤を部分的に酸化させて改質する改質手段(30、50)と、
前記還元触媒の活性化温度以上に設定された所定温度(T1)より前記還元触媒が高温である場合に、前記所定温度より前記還元触媒が低温である場合に比べて前記改質を抑制、または前記改質を停止させる改質制限手段(S54、S55)と、
前記還元剤にオゾンを供給することで、オゾンが存在する環境下で前記改質を実行させるオゾン供給手段(20、20p、36)と、
前記活性化温度以上かつ前記所定温度未満に設定された第2所定温度(T2)より前記還元触媒が低温であることを条件として、オゾンを供給させるように前記オゾン供給手段を制御するオゾン制御手段(S50)と、を備え、
前記オゾン制御手段は、前記還元触媒が低温であるほどオゾン供給量を増加させるように前記オゾン供給手段を制御することを特徴とする還元剤添加装置。 - 前記改質手段は、前記還元剤を酸素により部分的に酸化させる反応室(30a、30b)を内部に形成する反応容器(30)を有し、
前記改質制限手段は、前記反応室へ供給する酸素を減少またはゼロにすることで、前記改質を抑制または停止させることを特徴とする請求項1に記載の還元剤添加装置。 - 前記反応室へ供給される前記還元剤と空気の比率である当量比を、所定の当量比範囲に調整する当量比調整手段(S40)と、
前記反応室の温度を所定の温度範囲に調整する温度調整手段(S30)と、を備え、
前記当量比範囲および前記温度範囲は、前記反応室内の前記還元剤が空気中の酸素により部分的に酸化される冷炎反応が生じるように設定されていることを特徴とする請求項2に記載の還元剤添加装置。 - 内燃機関(10)の排気に含まれるNOxを還元触媒上で浄化するNOx浄化装置(15)が排気通路(10ex)に備えられた燃焼システムに設けられ、前記排気通路のうち前記還元触媒の上流側へ還元剤を添加する還元剤添加装置において、
前記還元剤を酸素により部分的に酸化させる反応室(30a、30b)を内部に形成する反応容器(30)を有し、前記還元剤を部分的に酸化させて改質する改質手段(30、50)と、
前記還元触媒の活性化温度以上に設定された所定温度(T1)より前記還元触媒が高温である場合に、前記所定温度より前記還元触媒が低温である場合に比べて前記改質を抑制、または前記改質を停止させる改質制限手段(S54、S55)と、
前記反応室へ供給される前記還元剤と空気の比率である当量比を、所定の当量比範囲に調整する当量比調整手段(S40)と、
前記反応室の温度を所定の温度範囲に調整する温度調整手段(S30)と、を備え、
前記当量比範囲および前記温度範囲は、前記反応室内の前記還元剤が空気中の酸素により部分的に酸化される冷炎反応が生じるように設定されており、
前記改質制限手段は、前記反応室へ供給する酸素を減少またはゼロにすることで、前記改質を抑制または停止させることを特徴とする還元剤添加装置。 - 前記還元剤にオゾンを供給することで、オゾンが存在する環境下で前記改質を実行させるオゾン供給手段(20、20p、36)と、
前記活性化温度以上かつ前記所定温度未満に設定された第2所定温度(T2)より前記還元触媒が低温であることを条件として、オゾンを供給させるように前記オゾン供給手段を制御するオゾン制御手段(S50)と、を備えることを特徴とする請求項4に記載の還元剤添加装置。 - 前記反応室へ空気を供給する空気供給配管(33)に設けられ、前記改質制限手段により前記改質を停止させている場合には、前記空気供給配管の内部通路を閉鎖させるように閉弁作動する逆止弁(34)を備えることを特徴とする請求項2〜5のいずれか1つに記載の還元剤添加装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014127026A JP6107748B2 (ja) | 2014-06-20 | 2014-06-20 | 還元剤添加装置 |
EP15172343.4A EP2966274B1 (en) | 2014-06-20 | 2015-06-16 | Reducing agent supplying device |
US14/743,146 US9556775B2 (en) | 2014-06-20 | 2015-06-18 | Reducing agent supplying device |
CN201510346335.3A CN105275550B (zh) | 2014-06-20 | 2015-06-19 | 还原剂供应装置 |
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JP2014127026A JP6107748B2 (ja) | 2014-06-20 | 2014-06-20 | 還元剤添加装置 |
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JP2016006306A JP2016006306A (ja) | 2016-01-14 |
JP6107748B2 true JP6107748B2 (ja) | 2017-04-05 |
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JP2014127026A Expired - Fee Related JP6107748B2 (ja) | 2014-06-20 | 2014-06-20 | 還元剤添加装置 |
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US (1) | US9556775B2 (ja) |
EP (1) | EP2966274B1 (ja) |
JP (1) | JP6107748B2 (ja) |
CN (1) | CN105275550B (ja) |
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JP6052257B2 (ja) * | 2014-09-18 | 2016-12-27 | 株式会社デンソー | 還元剤添加装置 |
WO2017094303A1 (ja) * | 2015-12-04 | 2017-06-08 | 三菱電機株式会社 | オゾン発生装置及びオゾン発生装置付き内燃機関 |
MX2021004573A (es) * | 2018-10-22 | 2021-09-08 | Shanghai Bixiufu Enterprise Man Co Ltd | Sistema y método de tratamiento de emisiones de motor. |
US20220250087A1 (en) * | 2018-10-22 | 2022-08-11 | Shanghai Bixiufu Enterprise Management Co., Ltd. | Engine exhaust dust removing system and method |
JP7188304B2 (ja) * | 2019-07-12 | 2022-12-13 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
Family Cites Families (16)
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JP3531489B2 (ja) | 1998-08-05 | 2004-05-31 | 三菱ふそうトラック・バス株式会社 | 燃焼排ガス用NO▲x▼還元システム |
US6176078B1 (en) * | 1998-11-13 | 2001-01-23 | Engelhard Corporation | Plasma fuel processing for NOx control of lean burn engines |
JP4289574B2 (ja) * | 1999-09-03 | 2009-07-01 | 日産ディーゼル工業株式会社 | 窒素酸化物浄化装置 |
JP3642273B2 (ja) * | 1999-10-21 | 2005-04-27 | 日産自動車株式会社 | 排気ガス浄化システム |
US6832473B2 (en) * | 2002-11-21 | 2004-12-21 | Delphi Technologies, Inc. | Method and system for regenerating NOx adsorbers and/or particulate filters |
US7040084B2 (en) * | 2002-12-16 | 2006-05-09 | General Motors Corporation | Exhaust emission aftertreatment |
US7240484B2 (en) * | 2003-12-29 | 2007-07-10 | Delphi Technologies, Inc. | Exhaust treatment systems and methods for using the same |
US7093429B1 (en) * | 2005-06-01 | 2006-08-22 | Gm Global Technology Operations Inc. | Reforming diesel fuel for NOx reduction |
US7484358B2 (en) * | 2005-06-17 | 2009-02-03 | Gm Global Technology Operations, Inc. | Continuous reforming of diesel fuel for NOx reduction |
US7939039B2 (en) * | 2007-09-11 | 2011-05-10 | GM Global Technology Operations LLC | Bimetallic catalyst for NOx reduction in engine exhaust |
JP4274279B2 (ja) * | 2007-11-02 | 2009-06-03 | トヨタ自動車株式会社 | 内燃機関 |
JP4881288B2 (ja) | 2007-12-13 | 2012-02-22 | 本田技研工業株式会社 | 内燃機関の排気浄化装置 |
US8434296B2 (en) * | 2008-01-08 | 2013-05-07 | Honda Motor Co., Ltd. | Exhaust emission control device for internal combustion engine |
JP4803186B2 (ja) | 2008-01-09 | 2011-10-26 | トヨタ自動車株式会社 | 燃料改質装置 |
US9145805B2 (en) | 2011-09-05 | 2015-09-29 | Hino Motors, Ltd. | Exhaust gas purifier |
JP6015684B2 (ja) * | 2014-01-30 | 2016-10-26 | 株式会社デンソー | 還元剤添加装置 |
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2014
- 2014-06-20 JP JP2014127026A patent/JP6107748B2/ja not_active Expired - Fee Related
-
2015
- 2015-06-16 EP EP15172343.4A patent/EP2966274B1/en not_active Not-in-force
- 2015-06-18 US US14/743,146 patent/US9556775B2/en not_active Expired - Fee Related
- 2015-06-19 CN CN201510346335.3A patent/CN105275550B/zh not_active Expired - Fee Related
Also Published As
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CN105275550B (zh) | 2018-12-11 |
JP2016006306A (ja) | 2016-01-14 |
US20150369102A1 (en) | 2015-12-24 |
EP2966274A1 (en) | 2016-01-13 |
US9556775B2 (en) | 2017-01-31 |
EP2966274B1 (en) | 2016-11-23 |
CN105275550A (zh) | 2016-01-27 |
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