WO2008022751A3 - Method for operating an exhaust-gas purification system in a lean-burn spark-ignition engine - Google Patents

Method for operating an exhaust-gas purification system in a lean-burn spark-ignition engine Download PDF

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Publication number
WO2008022751A3
WO2008022751A3 PCT/EP2007/007290 EP2007007290W WO2008022751A3 WO 2008022751 A3 WO2008022751 A3 WO 2008022751A3 EP 2007007290 W EP2007007290 W EP 2007007290W WO 2008022751 A3 WO2008022751 A3 WO 2008022751A3
Authority
WO
WIPO (PCT)
Prior art keywords
lean
catalytic converter
ammonia
exhaust
exhaust gas
Prior art date
Application number
PCT/EP2007/007290
Other languages
German (de)
French (fr)
Other versions
WO2008022751A2 (en
Inventor
Susanne Philipp
Torsten Franke
Stephan Eckhoff
Wilfried Mueller
Thomas Kreuzer
Hubert Bichler
Rainer Zimmer
Christof Schoen
Original Assignee
Umicore Ag & Co Kg
Bayerische Motoren Werke Ag
Daimlerchrisler Ag
Susanne Philipp
Torsten Franke
Stephan Eckhoff
Wilfried Mueller
Thomas Kreuzer
Hubert Bichler
Rainer Zimmer
Christof Schoen
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Umicore Ag & Co Kg, Bayerische Motoren Werke Ag, Daimlerchrisler Ag, Susanne Philipp, Torsten Franke, Stephan Eckhoff, Wilfried Mueller, Thomas Kreuzer, Hubert Bichler, Rainer Zimmer, Christof Schoen filed Critical Umicore Ag & Co Kg
Publication of WO2008022751A2 publication Critical patent/WO2008022751A2/en
Publication of WO2008022751A3 publication Critical patent/WO2008022751A3/en

Links

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]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • 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
    • 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
    • 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
    • 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
    • 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
    • F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
    • F01N2430/06—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by varying fuel-air ratio, e.g. by enriching fuel-air mixture
    • 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
    • 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
    • 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

Abstract

To remove nitrogen oxides from the exhaust gas of a lean-burn engine known methods use an exhaust-gas purification system composed of a nitrogen oxide storage catalytic converter and an SCR catalytic converter, operating the engine with alternately lean and rich air/fuel mixtures. The ammonia required for the SCR reaction is generated during the regeneration of the nitrogen oxide storage catalytic converter. One disadvantage is that, at high temperatures, sufficient ammonia is no longer generated during the regeneration. It is therefore proposed to inject ammonia upstream of the SCR catalytic converter at exhaust gas temperatures above approximately 350˚C. The injection of ammonia does not take place at exhaust gas temperatures below 350˚C. The method is particularly suitable for lean-burn engines with jet-controlled direct fuel injection which can also be operated at high load with a lean air/fuel mixture.
PCT/EP2007/007290 2006-08-19 2007-08-17 Method for operating an exhaust-gas purification system in a lean-burn spark-ignition engine WO2008022751A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06017313 2006-08-19
EP06017313.5 2006-08-19

Publications (2)

Publication Number Publication Date
WO2008022751A2 WO2008022751A2 (en) 2008-02-28
WO2008022751A3 true WO2008022751A3 (en) 2008-04-17

Family

ID=38943820

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/007290 WO2008022751A2 (en) 2006-08-19 2007-08-17 Method for operating an exhaust-gas purification system in a lean-burn spark-ignition engine

Country Status (1)

Country Link
WO (1) WO2008022751A2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008001724B4 (en) 2008-05-13 2021-10-07 Robert Bosch Gmbh Method and device for optimizing exhaust gas from an internal combustion engine
DE102008047722A1 (en) 2008-09-18 2010-03-25 Bayerische Motoren Werke Aktiengesellschaft Exhaust gas cleaning system operating method for Otto-internal combustion engine of motor vehicle, involves operating engine with air/fuel mixture when operating condition of engine produces exhaust gas temperature below preset temperature
FR2941874B1 (en) * 2009-02-06 2011-12-09 Inst Francais Du Petrole PROCESS FOR THE DETERMINATION TREATMENT OF NITROGEN OXIDES CONTAINED IN EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE
JP5917516B2 (en) 2010-09-02 2016-05-18 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ Catalyst for gasoline lean burn engine with improved NH3-forming activity
CN103189138B (en) 2010-09-02 2015-09-16 巴斯夫欧洲公司 There is the gasoline lean-combustion engine catalyst improving NO oxidation activity
US8950174B2 (en) 2010-09-02 2015-02-10 Basf Se Catalysts for gasoline lean burn engines with improved NH3-formation activity
US9242242B2 (en) 2010-09-02 2016-01-26 Basf Se Catalyst for gasoline lean burn engines with improved NO oxidation activity
FR3020831B1 (en) * 2014-05-06 2021-10-15 Peugeot Citroen Automobiles Sa AUTOMOTIVE VEHICLE WITH LOW TEMPERATURE DEPOLLUTION FUNCTION
FR3020830A1 (en) * 2014-05-06 2015-11-13 Peugeot Citroen Automobiles Sa MOTOR VEHICLE HAVING AN IMPROVED DEPOLLUTION SYSTEM
FR3025725B1 (en) * 2014-09-15 2019-05-24 Psa Automobiles Sa. PROCESS FOR THE DEPOLLUTION OF NITROGEN OXIDES

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10011612A1 (en) * 1999-03-11 2000-10-26 Toyota Motor Co Ltd Emission control device for an internal combustion engine
DE10113947A1 (en) * 2001-03-22 2002-09-26 Daimler Chrysler Ag Automotive catalyst units separated to facilitate temperature drop between units for regeneration
DE10152187A1 (en) * 2001-10-23 2003-04-30 Daimler Chrysler Ag Emission control system with nitrogen oxide storage catalyst and SCR catalyst and method for reducing the nitrogen oxide content in the exhaust gas of internal combustion engines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10011612A1 (en) * 1999-03-11 2000-10-26 Toyota Motor Co Ltd Emission control device for an internal combustion engine
DE10113947A1 (en) * 2001-03-22 2002-09-26 Daimler Chrysler Ag Automotive catalyst units separated to facilitate temperature drop between units for regeneration
DE10152187A1 (en) * 2001-10-23 2003-04-30 Daimler Chrysler Ag Emission control system with nitrogen oxide storage catalyst and SCR catalyst and method for reducing the nitrogen oxide content in the exhaust gas of internal combustion engines

Also Published As

Publication number Publication date
WO2008022751A2 (en) 2008-02-28

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