EP1124050A3 - Method and device for desulphating a nox accumulator catalyst - Google Patents

Method and device for desulphating a nox accumulator catalyst Download PDF

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Publication number
EP1124050A3
EP1124050A3 EP01101850A EP01101850A EP1124050A3 EP 1124050 A3 EP1124050 A3 EP 1124050A3 EP 01101850 A EP01101850 A EP 01101850A EP 01101850 A EP01101850 A EP 01101850A EP 1124050 A3 EP1124050 A3 EP 1124050A3
Authority
EP
European Patent Office
Prior art keywords
catalytic converter
storage catalytic
exhaust gas
desulfurization
concentration
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.)
Granted
Application number
EP01101850A
Other languages
German (de)
French (fr)
Other versions
EP1124050B1 (en
EP1124050A2 (en
Inventor
Stephan Ramatschi
Peter Müller
Stefan Detterbeck
Igor Milanovic
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1124050A2 publication Critical patent/EP1124050A2/en
Publication of EP1124050A3 publication Critical patent/EP1124050A3/en
Application granted granted Critical
Publication of EP1124050B1 publication Critical patent/EP1124050B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01N3/0807—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
    • F02D41/028—Desulfurisation of NOx traps or adsorbent
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
    • F02D41/1441—Plural sensors
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
    • F02D41/1461—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine
    • F02D41/1462—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine with determination means using an estimation
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
    • F02D41/1463—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases downstream of exhaust gas treatment apparatus
    • 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
    • F01N2570/04—Sulfur or sulfur oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0811—NOx storage efficiency

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

Vorrichtung und Verfahren zum Betrieb einer Brennkraftmaschine (2) zur Desulfatisierung eines in einer Abgasreinigungsanlage (3) angeordneten Stickoxidspeicherkatalysators (NOx-Speicherkatalysator) (4) durch zyklischen Wechsel des Luftverhältnisses λ. Durch Messung der NOx-Konzentration im Abgas mit einem ersten NOx-Sensor (5), der in Strömungsrichtung nach dem NOx-Speicherkatalysator (4) angeordnet ist, und Quotientenbildung des Sensorausgangsignals mit der NOx-Konzentration im Verbrennungsabgas der Brennkraftmaschine (2) vor dem NOx-Speicherkatalysator (4), wird die Desulfatisierung von Schwefeldioxidverbindungen SOx im NOx-Speicherkatalysator (4) derart durchgeführt, dass auch während der Desulfatisierung der Verschwefelungsgrad des NOx-Speicherkatalysators festgestellt werden kann und nur so lang desulfatisiert wird, wie es zur Wiederherstellung eines ausreichenden Katalysatorwirkungsgrades erforderlich ist. Ausserdem wird die Desulfatisierung so durchgeführt, dass kein Schwefelwasserstoff (H2S) entsteht.

Figure 00000001
Device and method for operating an internal combustion engine (2) for desulfating a nitrogen oxide storage catalytic converter (NO x storage catalytic converter) (4) arranged in an exhaust gas cleaning system (3) by cyclically changing the air ratio λ. By measuring the NO x concentration in the exhaust gas with a first NO x sensor (5), which is arranged downstream of the NO x storage catalytic converter (4), and forming the quotient of the sensor output signal with the NO x concentration in the combustion exhaust gas of the internal combustion engine ( 2) upstream of the NO x storage catalytic converter (4), the desulfurization of sulfur compounds sO desulfated x in the NO x storage catalytic converter (4) is performed such that even during the desulfurization of the degree of sulphurization of the NO x storage catalytic converter can be determined, and only so long becomes necessary to restore sufficient catalyst efficiency. In addition, the desulfation is carried out so that no hydrogen sulfide (H 2 S) is produced.
Figure 00000001
EP01101850A 2000-02-08 2001-01-26 Method and device for desulphating a nox accumulator catalyst Expired - Lifetime EP1124050B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10005473A DE10005473C2 (en) 2000-02-08 2000-02-08 Method and device for desulfating a nitrogen oxide storage catalyst
DE10005473 2000-02-08

Publications (3)

Publication Number Publication Date
EP1124050A2 EP1124050A2 (en) 2001-08-16
EP1124050A3 true EP1124050A3 (en) 2004-02-25
EP1124050B1 EP1124050B1 (en) 2005-12-21

Family

ID=7630186

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01101850A Expired - Lifetime EP1124050B1 (en) 2000-02-08 2001-01-26 Method and device for desulphating a nox accumulator catalyst

Country Status (2)

Country Link
EP (1) EP1124050B1 (en)
DE (2) DE10005473C2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10303085B4 (en) * 2002-01-28 2011-08-11 Toyota Jidosha Kabushiki Kaisha, Aichi-ken Exhaust gas control device and method of an internal combustion engine
JP3867612B2 (en) * 2002-04-12 2007-01-10 トヨタ自動車株式会社 Air-fuel ratio control device for internal combustion engine
KR102107710B1 (en) 2016-02-10 2020-05-07 스카니아 씨브이 악티에볼라그 Systems and methods for diagnosing exhaust sensors

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5724808A (en) * 1995-04-26 1998-03-10 Honda Giken Kogyo Kabushiki Kaisha Air-fuel ratio control system for internal combustion engines
EP0915244A2 (en) * 1997-11-10 1999-05-12 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Exhaust gas purifying apparatus of internal combustion engine
DE19859462A1 (en) * 1998-03-05 1999-09-09 Ford Global Tech Catalytic converter decontamination method
EP0962639A1 (en) * 1998-06-03 1999-12-08 Renault Method and apparatus to control the purging of sulphur oxides from an exhaust gas catalytic converter of an internal combustion engine
DE19827195A1 (en) * 1998-06-18 1999-12-23 Volkswagen Ag Process for the de-sulfation of a NOx storage catalytic converter
EP0972927A2 (en) * 1998-07-17 2000-01-19 Denso Corporation Engine exhaust purification system and method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19731624A1 (en) * 1997-07-23 1999-01-28 Volkswagen Ag Reversible rich regeneration of nitrogen@ oxide absorption catalyst
DE19801815A1 (en) * 1998-01-19 1999-07-22 Volkswagen Ag Lean-burn i.c. engine exhaust gas cleaning process
DE19816276C2 (en) * 1998-04-11 2000-05-18 Audi Ag Method and device for operating an internal combustion engine
DE19830829C1 (en) * 1998-07-09 1999-04-08 Siemens Ag NOX storage catalyst regeneration process

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5724808A (en) * 1995-04-26 1998-03-10 Honda Giken Kogyo Kabushiki Kaisha Air-fuel ratio control system for internal combustion engines
EP0915244A2 (en) * 1997-11-10 1999-05-12 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Exhaust gas purifying apparatus of internal combustion engine
DE19859462A1 (en) * 1998-03-05 1999-09-09 Ford Global Tech Catalytic converter decontamination method
EP0962639A1 (en) * 1998-06-03 1999-12-08 Renault Method and apparatus to control the purging of sulphur oxides from an exhaust gas catalytic converter of an internal combustion engine
DE19827195A1 (en) * 1998-06-18 1999-12-23 Volkswagen Ag Process for the de-sulfation of a NOx storage catalytic converter
EP0972927A2 (en) * 1998-07-17 2000-01-19 Denso Corporation Engine exhaust purification system and method

Also Published As

Publication number Publication date
EP1124050B1 (en) 2005-12-21
DE10005473A1 (en) 2001-08-09
DE10005473C2 (en) 2002-01-17
DE50108418D1 (en) 2006-01-26
EP1124050A2 (en) 2001-08-16

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