JP2005098269A - 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
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- JP2005098269A JP2005098269A JP2003335856A JP2003335856A JP2005098269A JP 2005098269 A JP2005098269 A JP 2005098269A JP 2003335856 A JP2003335856 A JP 2003335856A JP 2003335856 A JP2003335856 A JP 2003335856A JP 2005098269 A JP2005098269 A JP 2005098269A
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- 238000002485 combustion reaction Methods 0.000 title claims description 56
- 239000000446 fuel Substances 0.000 claims abstract description 130
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 52
- 239000011593 sulfur Substances 0.000 claims abstract description 52
- 230000002745 absorbent Effects 0.000 claims description 120
- 239000002250 absorbent Substances 0.000 claims description 120
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 abstract description 73
- 239000007924 injection Substances 0.000 abstract description 73
- 238000005265 energy consumption Methods 0.000 abstract description 5
- BCOSEZGCLGPUSL-UHFFFAOYSA-N 2,3,3-trichloroprop-2-enoyl chloride Chemical compound ClC(Cl)=C(Cl)C(Cl)=O BCOSEZGCLGPUSL-UHFFFAOYSA-N 0.000 abstract description 2
- 239000006096 absorbing agent Substances 0.000 abstract 4
- 235000013290 Sagittaria latifolia Nutrition 0.000 abstract 3
- 235000015246 common arrowhead Nutrition 0.000 abstract 3
- 239000000243 solution Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 72
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 39
- 239000010419 fine particle Substances 0.000 description 26
- 230000007423 decrease Effects 0.000 description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 13
- 229910052760 oxygen Inorganic materials 0.000 description 13
- 239000001301 oxygen Substances 0.000 description 13
- 229910052697 platinum Inorganic materials 0.000 description 13
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 7
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 6
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 6
- 239000004071 soot Substances 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- -1 potassium K Chemical class 0.000 description 4
- 239000010948 rhodium Substances 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 3
- 229910052788 barium Inorganic materials 0.000 description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052741 iridium Inorganic materials 0.000 description 2
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910052703 rhodium Inorganic materials 0.000 description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910001422 barium ion Inorganic materials 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- Y02T10/40—Engine management systems
Landscapes
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
【解決手段】 NOX吸収剤内に蓄えられているSOXの量を減少させるべきときにはSOX量減少制御を行う。SOX量減少制御が行われているときに機関負荷を表す燃料噴射量QFが上限噴射量QFHよりも多くなったときには(矢印X)、NOX吸収剤の温度TCATを待機温度例えばSOX量減少要求温度TSに保持しつつNOX吸収剤内に流入する排気ガスの空燃比をリーンにする待機制御を行う。待機制御が設定時間tCだけ継続されたときに(矢印Y)このときの蓄積SOX量QSが設定SOX量QS1よりも多いときには待機制御を継続して行い、次いで燃料噴射量QFが上限噴射量QFHよりも少なくなるとSOX量減少制御を再開する(矢印Z)。蓄積SOX量QSが設定SOX量QS1よりも少ないときには待機制御を停止して通常運転に戻す。
【選択図】 図5
Description
17,18…NOX吸収剤
19…パティキュレートフィルタ
25…燃料供給弁
43…温度センサ
Claims (3)
- リーン空燃比のもとでの燃焼が行われる内燃機関の排気通路内に、流入する排気ガスの空燃比がリーンのときに流入する排気ガス中のNOXを蓄え、流入する排気ガスの空燃比が低下したときに排気ガス中に還元剤が含まれていると蓄えているNOXを還元して蓄えているNOXの量を減少させるNOX吸収剤を配置し、NOX吸収剤内に蓄えられているイオウの量を減少させるべきときにはNOX吸収剤の温度をイオウ量減少要求温度に保持しつつNOX吸収剤内に流入する排気ガスの空燃比を理論空燃比又はリッチにするイオウ量減少制御を行うようにした内燃機関において、イオウ量減少制御が行われているときに機関負荷が予め定められた上限負荷よりも高くなったときには、NOX吸収剤の温度を通常運転時におけるよりも高い待機温度に保持しつつNOX吸収剤内に流入する排気ガスの空燃比をリーンにする待機制御を行い、待機制御が予め定められた設定時間だけ継続されたときにはこのときNOX吸収剤内に蓄えられているイオウの量を求め、該求められたイオウの量が予め定められた設定量よりも多いときには待機制御を継続して行い次いで機関負荷が上限負荷よりも低くなったときにイオウ量減少制御を再開し、該求められたイオウの量が該設定量よりも少ないときには待機制御を停止して通常運転に戻すようにした内燃機関の排気浄化装置。
- 待機制御が行われているときにNOX吸収剤の温度を待機温度に保持するために、NOX吸収剤上流の排気通路内に燃料を二次的に供給す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。
- 排気ガス中の微粒子を捕集するためのパティキュレートフィルタ上に前記NOX吸収剤が担持されており、パティキュレートフィルタ上に堆積した微粒子を酸化除去するためにパティキュレートフィルタ内に流入する排気ガスの空燃比をリーンに保持しながらパティキュレートフィルタの温度を上昇させる微粒子除去制御が行われるようになっており、微粒子酸化制御が完了したときにNOX吸収剤内に蓄えられているイオウの量を求め、該求められたイオウの量が予め定められた許容量よりも多いときにはNOX吸収剤内に蓄えられているイオウの量を減少させるべきであると判断し、該求められたイオウの量が該許容量よりも少ないときにはNOX吸収剤内に蓄えられているイオウの量を減少させるべきであると判断しないようにした請求項1に記載の内燃機関の排気浄化装置。
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JP2005098269A true JP2005098269A (ja) | 2005-04-14 |
JP4297762B2 JP4297762B2 (ja) | 2009-07-15 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010053819A (ja) * | 2008-08-29 | 2010-03-11 | Nissan Motor Co Ltd | 内燃機関の排気浄化装置 |
JP2012246930A (ja) * | 2012-07-13 | 2012-12-13 | Nissan Motor Co Ltd | 内燃機関の排気浄化装置 |
CN104246185A (zh) * | 2012-04-05 | 2014-12-24 | 德尔福国际运营卢森堡有限公司 | 贫nox阱的脱硫工艺 |
-
2003
- 2003-09-26 JP JP2003335856A patent/JP4297762B2/ja not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010053819A (ja) * | 2008-08-29 | 2010-03-11 | Nissan Motor Co Ltd | 内燃機関の排気浄化装置 |
CN104246185A (zh) * | 2012-04-05 | 2014-12-24 | 德尔福国际运营卢森堡有限公司 | 贫nox阱的脱硫工艺 |
JP2015515572A (ja) * | 2012-04-05 | 2015-05-28 | デルファイ・インターナショナル・オペレーションズ・ルクセンブルク・エス・アー・エール・エル | リーンnoxトラップ脱硫方法 |
JP2012246930A (ja) * | 2012-07-13 | 2012-12-13 | Nissan Motor Co Ltd | 内燃機関の排気浄化装置 |
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JP4297762B2 (ja) | 2009-07-15 |
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