JP4712045B2 - 希薄燃焼型内燃機関で発生する排ガス中の窒素酸化物を還元するシステム及び方法 - Google Patents
希薄燃焼型内燃機関で発生する排ガス中の窒素酸化物を還元するシステム及び方法 Download PDFInfo
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- JP4712045B2 JP4712045B2 JP2007541127A JP2007541127A JP4712045B2 JP 4712045 B2 JP4712045 B2 JP 4712045B2 JP 2007541127 A JP2007541127 A JP 2007541127A JP 2007541127 A JP2007541127 A JP 2007541127A JP 4712045 B2 JP4712045 B2 JP 4712045B2
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- dimethyl ether
- injector
- lean
- nox catalyst
- injection
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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
- F01N3/10—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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/36—Arrangements for supply of additional fuel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
- B01F23/213—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
- B01F25/3133—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit characterised by the specific design of the injector
- B01F25/31332—Ring, torus, toroidal or coiled configurations
-
- 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
-
- 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
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
-
- 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
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
- F01N2510/063—Surface coverings for exhaust purification, e.g. catalytic reaction zeolites
-
- 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
-
- 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
-
- 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
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Claims (15)
- 希薄燃焼型内燃機関(10)で発生する排ガス中の窒素酸化物を還元するシステム(20)において、希薄燃焼型内燃機関(10)の排気管(22)に接続されるように配置された希薄NOx触媒(21)と、還元プロセスにおいて希薄NOx触媒(21)によって使用される還元剤を噴射するように構成された噴射器(23)と、還元剤を収容している燃料タンク(14)とを有し、前記燃料タンク(14)は、還元剤としてジメチルエーテルを収容するようになっている圧力タンク(14)であり、前記噴射器(23)は、前記希薄NOx触媒(21)の上流側でジメチルエーテルを噴射するようになっている、システム(20)であって、
前記噴射器(23)は、らせん形導管として構成されるとともに、該らせん方向に沿う複数の開口部が配列された1組の噴射口(27)を有しており、該1組の噴射口(27)は、噴射器がある場所での排気管の長手軸に直交する断面の半径方向の距離であって前記1組の噴射口の中で互いに最も離れた位置にある噴射口の間の距離(d)、及び希薄NOx触媒の同等半径(R)が、d/R>0.5の関係を満たすことを特徴とする、システム。 - 前記1組の噴射口(27)は、少なくとも6個の前記開口部が配列されて成ることを特徴とする、請求項1に記載のシステム。
- 圧力タンク(14)は、ジメチルエーテルを液体として貯蔵するようになっており、それにより、圧力タンク(14)内に貯蔵されているジメチルエーテルによって発生する圧力によって噴射が促進されることを特徴とする、請求項1または2に記載のシステム。
- 噴射器(23)を圧力タンク(14)に接続する導管内に弁(24)が配置され、該弁(24)は、ジメチルエーテルの噴射を制御するように構成されることを特徴とする、請求項1乃至3のいずれかに記載のシステム。
- 前記噴射器(23)は、前記希薄NOx触媒(21)のすぐ上流側にあり、前記噴射器(23)及び前記希薄NOx触媒(21)間にミキサが存在しないことを特徴とする、請求項1乃至4のいずれかに記載のシステム。
- 噴射器(23)は、ジメチルエーテルを600,000パスカルより低い圧力で噴射するように構成されることを特徴とする、請求項1乃至5のいずれかに記載のシステム。
- 希薄NOx触媒(21)の触媒材料は、銀アルミナコーティングからなることを特徴とする、請求項1乃至6のいずれかに記載のシステム。
- 希薄NOx触媒(21)の触媒材料は、銅ゼオライトからなることを特徴とする、請求項1乃至6のいずれかに記載のシステム。
- 希薄NOx触媒(21)の触媒材料は、銀モデナイトからなることを特徴とする、請求項1乃至6のいずれかに記載のシステム。
- システムは、排気管内への噴射前のジメチルエーテルの液体から気体への相転移を支援するように構成されることを特徴とする、請求項1乃至9のいずれかに記載のシステム。
- 希薄燃焼型内燃機関(10)で発生する排ガス中の窒素酸化物を還元する方法であって、
希薄燃焼型内燃機関(10)で発生した排ガスを、希薄燃焼型内燃機関(10)の排気管(22)に接続された希薄NOx触媒(21)に触れさせるステップ(S10)と、
ジメチルエーテルを還元剤として圧力タンク(14)から噴射器(23)に供給するステップであって、前記噴射器(23)は、らせん形導管として構成されるとともに、該らせん方向に沿う複数の開口部が配列された1組の噴射口(27)を有しており、該1組の噴射口(27)は、噴射器がある場所での排気管の長手軸に直交する断面の半径方向の距離であって前記1組の噴射口の中で互いに最も離れた位置にある噴射口の間の距離(d)、及び希薄NOx触媒の同等半径(R)が、d/R>0.5の関係を満たす、ステップ(S20)と、
前記希薄NOx触媒(21)の上流側にジメチルエーテルを噴射し、それにより、窒素酸化物を還元するステップと、
を含む方法。 - ジメチルエーテルの噴射は、圧力タンク(14)内に液体として貯蔵されているジメチルエーテルによって発生する圧力によって促進されることを特徴とする、請求項11に記載の方法。
- 噴射器を圧力タンク(14)に接続する導管内に弁(24)が配置され、該弁は、流体通路の開閉によってジメチルエーテルの噴射を制御し、それにより、弁が開放状態にあるとき、圧力タンク内の圧力が、排気管内へのジメチルエーテルの噴射を促進することを特徴とする、請求項12に記載の方法。
- 噴射器(23)は、ジメチルエーテルを600,000パスカルより低い圧力で噴射することを特徴とする、請求項11乃至13のいずれかに記載の方法。
- 排気管内への噴射前のジメチルエーテルの液体から気体への相転移を支援することを特徴とする、請求項11乃至14のいずれかに記載の方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/SE2004/001451 WO2006052168A1 (en) | 2004-10-11 | 2004-10-11 | System and method for reduction of nitrogen oxides from exhaust gases generated by a lean-burn internal combustion engine |
Publications (2)
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JP2008519935A JP2008519935A (ja) | 2008-06-12 |
JP4712045B2 true JP4712045B2 (ja) | 2011-06-29 |
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JP2007541127A Expired - Fee Related JP4712045B2 (ja) | 2004-10-11 | 2004-11-11 | 希薄燃焼型内燃機関で発生する排ガス中の窒素酸化物を還元するシステム及び方法 |
Country Status (8)
Country | Link |
---|---|
US (1) | US7448207B2 (ja) |
EP (1) | EP1812696B9 (ja) |
JP (1) | JP4712045B2 (ja) |
CN (1) | CN101432506B (ja) |
AT (1) | ATE406507T1 (ja) |
BR (1) | BRPI0419087A (ja) |
DE (1) | DE602004016229D1 (ja) |
WO (1) | WO2006052168A1 (ja) |
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US8871669B2 (en) * | 2008-05-19 | 2014-10-28 | General Electric Company | Catalyst and method of manufacture |
US8171722B2 (en) * | 2008-12-05 | 2012-05-08 | Caterpillar Inc. | Fluid delivery system |
US20100196237A1 (en) * | 2009-01-30 | 2010-08-05 | General Electric Company | Templated catalyst composition and associated method |
FR2949505B1 (fr) * | 2009-09-03 | 2011-09-02 | Peugeot Citroen Automobiles Sa | Dispositif d'injection de reducteur pour une reduction catalytique selective et ensemble comportant un moteur et une ligne d'echappement muni d'un tel dispositif d'injection |
FR2955610B1 (fr) * | 2010-01-22 | 2012-01-13 | Peugeot Citroen Automobiles Sa | Dispositif d'injection de gaz et ligne d'echappement comprenant un tel dispositif |
US20110219745A1 (en) * | 2010-03-12 | 2011-09-15 | International Engine Intellectual Property Company, Llc | Method and apparatus for gaseous mixing in a diesel exhaust system |
BR112013025023A2 (pt) * | 2011-03-28 | 2017-01-10 | Haldor Topsoe As | processo para a redução de óxidos de nitrogênio e óxidos de enxofre nos gases de escape de motores de combustão interna |
DE102011078181A1 (de) * | 2011-06-28 | 2013-01-03 | Robert Bosch Gmbh | Vorrichtung und Verfahren zum Einbringen eines Reduktionsmittels in einen Abgasstrang |
US20140369898A1 (en) * | 2012-01-27 | 2014-12-18 | International Engine Intellectual Property Company, Llc | Cross style (4 port) ammonia gas injector |
US9719386B2 (en) * | 2013-01-31 | 2017-08-01 | Tenneco Automotive Operating Company Inc. | Multi-lobed soot blower |
US9482132B2 (en) * | 2013-11-07 | 2016-11-01 | Cummins Emission Solutions, Inc. | Gaseous reductant delivery devices and systems |
US10473013B2 (en) | 2014-09-26 | 2019-11-12 | Cummins Emission Solutions, Inc. | Integrative reductant system and method using constant volume injection |
US10392989B1 (en) | 2018-10-19 | 2019-08-27 | Faurecia Emissions Control Technologies, Usa, Llc | Automotive exhaust aftertreatment system having an ammonia distributor |
US10774718B2 (en) * | 2018-10-31 | 2020-09-15 | Caterpillar Inc. | Multi-nozzle design to eliminate downstream mixing devices |
US10794252B1 (en) | 2019-04-18 | 2020-10-06 | Faurecia Emissions Control Technologies, Usa, Llc | Direct spray exhaust mixer system |
US10883407B1 (en) * | 2019-07-26 | 2021-01-05 | Faurecia Emissions Control Technologies, Usa, Llc | Automotive aftertreatment system having a tubular injector |
US11203966B1 (en) | 2020-09-30 | 2021-12-21 | Faurecia Emissions Control Technologies, Usa, Llc | Circular sampling device for an exhaust gas sensor |
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2004
- 2004-10-11 AT AT04800241A patent/ATE406507T1/de not_active IP Right Cessation
- 2004-10-11 CN CN2004800442092A patent/CN101432506B/zh not_active Expired - Fee Related
- 2004-10-11 EP EP04800241A patent/EP1812696B9/en not_active Not-in-force
- 2004-10-11 WO PCT/SE2004/001451 patent/WO2006052168A1/en active Application Filing
- 2004-10-11 DE DE602004016229T patent/DE602004016229D1/de active Active
- 2004-11-11 BR BRPI0419087-4A patent/BRPI0419087A/pt not_active IP Right Cessation
- 2004-11-11 US US11/576,427 patent/US7448207B2/en not_active Expired - Fee Related
- 2004-11-11 JP JP2007541127A patent/JP4712045B2/ja not_active Expired - Fee Related
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JP2002221024A (ja) * | 2001-01-22 | 2002-08-09 | Kawasaki Heavy Ind Ltd | 脱硝装置用液体還元剤の供給方法及び装置 |
JP2002327618A (ja) * | 2001-04-27 | 2002-11-15 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
Also Published As
Publication number | Publication date |
---|---|
BRPI0419087A (pt) | 2007-12-26 |
ATE406507T1 (de) | 2008-09-15 |
CN101432506B (zh) | 2011-01-12 |
CN101432506A (zh) | 2009-05-13 |
DE602004016229D1 (de) | 2008-10-09 |
EP1812696B1 (en) | 2008-08-27 |
WO2006052168A8 (en) | 2007-08-16 |
WO2006052168A1 (en) | 2006-05-18 |
JP2008519935A (ja) | 2008-06-12 |
US7448207B2 (en) | 2008-11-11 |
EP1812696A1 (en) | 2007-08-01 |
EP1812696B9 (en) | 2008-11-26 |
US20080060352A1 (en) | 2008-03-13 |
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