JP4420048B2 - 内燃機関の排気浄化装置 - Google Patents
内燃機関の排気浄化装置 Download PDFInfo
- Publication number
- JP4420048B2 JP4420048B2 JP2007072156A JP2007072156A JP4420048B2 JP 4420048 B2 JP4420048 B2 JP 4420048B2 JP 2007072156 A JP2007072156 A JP 2007072156A JP 2007072156 A JP2007072156 A JP 2007072156A JP 4420048 B2 JP4420048 B2 JP 4420048B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- storage catalyst
- upstream
- storage
- catalyst
- 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
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Classifications
-
- 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
-
- 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
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0093—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are of the same type
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/02—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate silencers in series
-
- 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
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1021—Platinum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/202—Alkali metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/204—Alkaline earth metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/206—Rare earth metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/91—NOx-storage component incorporated in the catalyst
-
- 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
- F01N2570/14—Nitrogen oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/36—Control for minimising NOx emissions
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Description
本発明はNOx吸蔵触媒から放出されたNOxを必要に応じて還元させたり、還元させなかったりする内燃機関の排気浄化装置を提供することにある。
図1を参照すると、1は機関本体、2は各気筒の燃焼室、3は各燃焼室2内に夫々燃料を噴射するための電子制御式燃料噴射弁、4は吸気マニホルド、5は排気マニホルドを夫々示す。吸気マニホルド4は吸気ダクト6を介して排気ターボチャージャ7のコンプレッサ7aの出口に連結され、コンプレッサ7aの入口は吸入空気量を検出する吸入空気量検出器8を介してエアクリーナ9に連結される。吸気ダクト6内にはステップモータにより駆動されるスロットル弁10が配置され、更に吸気ダクト6周りには吸気ダクト6内を流れる吸入空気を冷却するための冷却装置11が配置される。図1に示される実施例では機関冷却水が冷却装置11内に導かれ、機関冷却水によって吸入空気が冷却される。
図6を参照するとまず初めにステップ50において図5(A)に示すマップから単位時間当り排出される排出NOx量NOXAが算出される。次いでステップ51ではこの排出NOx量NOXAが最大NOx吸蔵量MAXよりも小さいか否かが判別される。NOXA≦MAXのときにはステップ52に進んで上流側NOx吸蔵触媒12に単位時間当り吸蔵されるNOx量NOX1が排出NOx量NOXAとされる。次いでステップ55に進む。
5 排気マニホルド
7 排気ターボチャージャ
12 上流側NOx吸蔵触媒
14 下流側NOx吸蔵触媒
15 還元剤供給弁
Claims (4)
- 流入する排気ガスの空燃比がリーンのときには排気ガス中に含まれるNOxを吸蔵し流入する排気ガス中の酸素濃度が低下すると吸蔵したNOxを放出する少くとも一対のNOx吸蔵触媒を機関排気通路内に直列に配置し、上流側のNOx吸蔵触媒からNOxを放出させて放出されたNOxを下流側のNOx吸蔵触媒に吸蔵させるときには排気ガスの空燃比をリーンに維持した状態で排気ガス中の酸素濃度を一時的に低下させ、上流側NOx吸蔵触媒および下流側NOx吸蔵触媒からNOxを放出させかつ還元させるときには排気ガスの空燃比をリーンからリッチに一時的に切換えるようにした内燃機関の排気浄化装置。
- 上流側NOx吸蔵触媒に吸蔵されたNOx量が許容量を越えたときに上記一対のNOx吸蔵触媒の温度を代表する温度が予め定められた設定温度よりも低いときには排気ガスの空燃比をリーンに維持した状態で排気ガス中の酸素濃度を一時的に低下させることにより上流側のNOx吸蔵触媒からNOxを放出させて放出されたNOxを下流側のNOx吸蔵触媒に吸蔵させ、上流側NOx吸蔵触媒に吸蔵されたNOx量が許容量を越えたときに上記一対のNOx吸蔵触媒の温度を代表する温度が予め定められた設定温度よりも高いときには排気ガスの空燃比をリーンからリッチに一時的に切換えることにより上流側NOx吸蔵触媒および下流側NOx吸蔵触媒からNOxを放出させかつ還元させるようにした請求項1に記載の内燃機関の排気浄化装置。
- 下流側NOx吸蔵触媒に吸蔵されたNOx量が許容量を越えたときに上記一対のNOx吸蔵触媒の温度を代表する温度が予め定められた設定温度よりも高いときには排気ガスの空燃比をリーンからリッチに一時的に切換えることにより上流側NOx吸蔵触媒および下流側NOx吸蔵触媒からNOxを放出させかつ還元させるようにした請求項1に記載の内燃機関の排気浄化装置。
- 上流側NOx吸蔵触媒上流の機関排気通路内に炭化水素からなる還元剤を供給するための還元剤供給弁を配置し、該還元剤供給弁から炭化水素を供給することによって排気ガス中の酸素濃度が低下せしめられる請求項1に記載の内燃機関の排気浄化装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007072156A JP4420048B2 (ja) | 2007-03-20 | 2007-03-20 | 内燃機関の排気浄化装置 |
CN2008800077684A CN101646852B (zh) | 2007-03-20 | 2008-03-19 | 内燃机的排气净化装置 |
EP08738963.1A EP2138692B1 (en) | 2007-03-20 | 2008-03-19 | Exhaust cleaner for internal combustion engine |
US12/449,972 US8297044B2 (en) | 2007-03-20 | 2008-03-19 | Exhaust purification device of an internal combustion engine |
PCT/JP2008/055796 WO2008114887A1 (ja) | 2007-03-20 | 2008-03-19 | 内燃機関の排気浄化装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007072156A JP4420048B2 (ja) | 2007-03-20 | 2007-03-20 | 内燃機関の排気浄化装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008232003A JP2008232003A (ja) | 2008-10-02 |
JP4420048B2 true JP4420048B2 (ja) | 2010-02-24 |
Family
ID=39765985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007072156A Expired - Fee Related JP4420048B2 (ja) | 2007-03-20 | 2007-03-20 | 内燃機関の排気浄化装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8297044B2 (ja) |
EP (1) | EP2138692B1 (ja) |
JP (1) | JP4420048B2 (ja) |
CN (1) | CN101646852B (ja) |
WO (1) | WO2008114887A1 (ja) |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4868096B2 (ja) * | 2009-09-03 | 2012-02-01 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JPWO2011048706A1 (ja) * | 2009-10-23 | 2013-03-07 | トヨタ自動車株式会社 | 内燃機関の空燃比制御装置 |
BRPI1012591B1 (pt) * | 2010-03-15 | 2020-08-11 | Toyota Jidosha Kabushiki Kaisha | Sistema de purificação de descarga de motor de combustão interna |
US8671667B2 (en) | 2010-03-15 | 2014-03-18 | Toyota Jidosha Kabushiki Kaisha | Exhaust purification system of internal combustion engine |
KR101339523B1 (ko) | 2010-03-15 | 2013-12-10 | 도요타지도샤가부시키가이샤 | 내연 기관의 배기 정화 장치 |
JP5196027B2 (ja) | 2010-04-01 | 2013-05-15 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP5196024B2 (ja) | 2010-07-28 | 2013-05-15 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
RU2489578C2 (ru) | 2010-08-30 | 2013-08-10 | Тойота Дзидося Кабусики Кайся | Система очистки выхлопных газов двигателя внутреннего сгорания |
EP2460990B8 (en) | 2010-08-30 | 2016-12-07 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification device for internal combustion engine |
JP5168412B2 (ja) * | 2010-09-02 | 2013-03-21 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
CN102713189B (zh) * | 2010-09-02 | 2014-10-15 | 丰田自动车株式会社 | 内燃机的排气净化装置 |
CN103154455B (zh) | 2010-10-04 | 2015-07-15 | 丰田自动车株式会社 | 内燃机的排气净化装置 |
ES2584605T3 (es) | 2010-10-04 | 2016-09-28 | Toyota Jidosha Kabushiki Kaisha | Método para purificación de gases de escape en sistema de purificación de gases de escape de motor de combustión interna |
EP2617959B1 (en) | 2010-10-18 | 2019-03-20 | Toyota Jidosha Kabushiki Kaisha | Nox purification method of an exhaust purification system of an internal combustion engine |
WO2012077240A1 (ja) | 2010-12-06 | 2012-06-14 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP5182428B2 (ja) | 2010-12-20 | 2013-04-17 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP5131389B2 (ja) | 2010-12-24 | 2013-01-30 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
WO2012108059A1 (ja) | 2011-02-07 | 2012-08-16 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
WO2012108063A1 (ja) | 2011-02-10 | 2012-08-16 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
US9010097B2 (en) | 2011-03-17 | 2015-04-21 | Toyota Jidosha Kabushiki Kaisha | Exhaust purification system of internal combustion engine |
WO2012140784A1 (ja) | 2011-04-15 | 2012-10-18 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP5742535B2 (ja) * | 2011-07-20 | 2015-07-01 | 日産自動車株式会社 | 吸気コレクターの内部状態推定装置 |
US9034268B2 (en) | 2011-11-07 | 2015-05-19 | Toyota Jidosha Kabushiki Kaisha | Exhaust purification system of internal combustion engine |
CN103958842B (zh) | 2011-11-09 | 2016-08-17 | 丰田自动车株式会社 | 内燃机的排气净化装置 |
EP2623738B1 (en) | 2011-11-30 | 2019-08-21 | Toyota Jidosha Kabushiki Kaisha | NOx purification method of an exhaust purification system of an internal combustion engine |
US9028763B2 (en) | 2011-11-30 | 2015-05-12 | Toyota Jidosha Kabushiki Kaisha | Exhaust purification system of internal combustion engine |
WO2013118254A1 (ja) | 2012-02-07 | 2013-08-15 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP6015629B2 (ja) * | 2013-11-01 | 2016-10-26 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
JP6477088B2 (ja) * | 2015-03-20 | 2019-03-06 | いすゞ自動車株式会社 | NOx吸蔵量推定装置 |
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JP6733651B2 (ja) * | 2017-12-27 | 2020-08-05 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP2019152167A (ja) * | 2018-03-05 | 2019-09-12 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
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JP2783074B2 (ja) * | 1991-10-29 | 1998-08-06 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP3344040B2 (ja) | 1993-11-25 | 2002-11-11 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP3484759B2 (ja) | 1994-05-18 | 2004-01-06 | いすゞ自動車株式会社 | ディーゼル機関の排気浄化装置 |
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JP4167871B2 (ja) | 2002-09-13 | 2008-10-22 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
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GB0305415D0 (en) * | 2003-03-08 | 2003-04-16 | Johnson Matthey Plc | Exhaust system for lean burn IC engine including particulate filter and NOx absorbent |
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JP4020054B2 (ja) * | 2003-09-24 | 2007-12-12 | トヨタ自動車株式会社 | 内燃機関の排気浄化システム |
JP2005291098A (ja) * | 2004-03-31 | 2005-10-20 | Mitsubishi Fuso Truck & Bus Corp | エンジンの排ガス浄化装置 |
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2007
- 2007-03-20 JP JP2007072156A patent/JP4420048B2/ja not_active Expired - Fee Related
-
2008
- 2008-03-19 CN CN2008800077684A patent/CN101646852B/zh not_active Expired - Fee Related
- 2008-03-19 EP EP08738963.1A patent/EP2138692B1/en not_active Not-in-force
- 2008-03-19 US US12/449,972 patent/US8297044B2/en active Active
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Publication number | Publication date |
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CN101646852B (zh) | 2013-11-13 |
EP2138692A4 (en) | 2011-08-31 |
JP2008232003A (ja) | 2008-10-02 |
US8297044B2 (en) | 2012-10-30 |
US20100115923A1 (en) | 2010-05-13 |
WO2008114887A1 (ja) | 2008-09-25 |
EP2138692A1 (en) | 2009-12-30 |
CN101646852A (zh) | 2010-02-10 |
EP2138692B1 (en) | 2014-11-12 |
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