EP1209332A3 - Method and apparatus for regenerating a NOx storage catalyst - Google Patents

Method and apparatus for regenerating a NOx storage catalyst Download PDF

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Publication number
EP1209332A3
EP1209332A3 EP01250407A EP01250407A EP1209332A3 EP 1209332 A3 EP1209332 A3 EP 1209332A3 EP 01250407 A EP01250407 A EP 01250407A EP 01250407 A EP01250407 A EP 01250407A EP 1209332 A3 EP1209332 A3 EP 1209332A3
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EP
European Patent Office
Prior art keywords
regeneration
catalytic converter
storage catalytic
signal
time
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
EP01250407A
Other languages
German (de)
French (fr)
Other versions
EP1209332B8 (en
EP1209332A2 (en
EP1209332B1 (en
Inventor
Hermann Hahn
Ekkehard Pott
Sören HINZE
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.)
Volkswagen AG
Original Assignee
Volkswagen 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
Priority claimed from DE2000157936 external-priority patent/DE10057936A1/en
Priority claimed from DE2000157938 external-priority patent/DE10057938A1/en
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of EP1209332A2 publication Critical patent/EP1209332A2/en
Publication of EP1209332A3 publication Critical patent/EP1209332A3/en
Application granted granted Critical
Publication of EP1209332B1 publication Critical patent/EP1209332B1/en
Publication of EP1209332B8 publication Critical patent/EP1209332B8/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02D41/14—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
    • 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
    • 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
    • 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
    • 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
    • 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
    • F02D2200/0802—Temperature of the exhaust gas treatment apparatus
    • F02D2200/0804—Estimation of the temperature of the exhaust gas treatment apparatus
    • 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
    • F02D2200/0806—NOx storage amount, i.e. amount of NOx stored on NOx trap
    • 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
    • F02D2200/0814—Oxygen storage amount
    • 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
    • F02D2200/0816—Oxygen storage capacity
    • 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
    • F02D41/1454—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 oxygen content or concentration or the air-fuel ratio

Landscapes

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

Abstract

Die Erfindung betrifft Verfahren zur NOX-Regeneration eines in einem Abgaskanal einer magerlauffähigen Verbrennungskraftmaschine angeordneten NOX-Speicherkatalysators, wobei der NOX-Speicherkatalysator bis zum Erreichen eines Regenerationsendes mit einer Abgasatmosphäre mit λ ≤ 1 beaufschlagt wird und ein Regenerationsverlauf anhand eines durch eine stromab des NOX-Speicherkatalysators angeordnete sauerstoffsensitive Messeinrichtung bereitgestellten sauerstoffabhängigen Signals verfolgt wird, sowie Vorrichtungen zur Regeneration eines NOx-Speicherkatalysators.The invention relates to methods for NO x regeneration of an arranged in an exhaust passage of a lean executable internal combustion engine NO x storage catalytic converter, the NO x storage catalyst is applied to reach a regeneration end with an exhaust gas atmosphere with λ ≤ 1, and a regeneration process on the basis of a by a downstream of the NO x storage catalytic converter arranged oxygen-sensitive measuring device provided oxygen-dependent signal is tracked, as well as devices for regeneration of a NO x storage catalytic converter.

Es ist vorgesehen, dass während der NOx-Regeneration das sauerstoffabhängige Signal (Uλ) der Messeinrichtung (20) hochgerechnet wird und auf Basis des hochgerechneten Signals ein theoretischer Zeitpunkt (ts) bestimmt wird, an dem ein vorgegebener Signalschwellenwert (USE) überschritten wird, und das Regenerationsende (tE) bestimmt wird, indem eine im Wesentlichen einer Abgaslaufzeit zwischen Verbrennungskraftmaschine (10) und NOx-Speicherkatalysator (18) entsprechende Zeitspanne (Δt) von dem theoretischen Zeitpunkt (tS) subtrahiert wird. Weiterhin ist vorgesehen, ein Luft-Kraftstoff-Gemisch (Verbrennungslambda) in Abhängigkeit von dem hochgerechneten Signal (Uλ) unter Berücksichtigung der Abgaslaufzeit (Δt) zu variieren.It is provided that during the NO x regeneration the oxygen-dependent signal (U λ ) of the measuring device (20) is extrapolated and based on the extrapolated signal a theoretical point in time (t s ) is determined at which a predefined signal threshold value (U SE ) is exceeded, and the end of regeneration (t E ) is determined by subtracting a time period (Δt) substantially corresponding to an exhaust gas runtime between the internal combustion engine (10) and NO x storage catalytic converter (18) from the theoretical point in time (t S ). It is also provided to vary an air-fuel mixture (combustion lambda) as a function of the extrapolated signal (U λ ), taking into account the exhaust gas runtime (Δt).

Die erfindungsgemäßen Maßnahmen gewährleisten eine weitgehende Unterdrückung von Schadstoffemissionen am Ende einer Regeneration. Zudem kann eine Gesamtdauer der Regeneration verkürzt werden.

Figure 00000001
The measures according to the invention ensure extensive suppression of pollutant emissions at the end of a regeneration. In addition, a total regeneration time can be shortened.
Figure 00000001
EP20010250407 2000-11-22 2001-11-21 Method and device for regenerating an NOx storage catalytic converter Expired - Lifetime EP1209332B8 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2000157936 DE10057936A1 (en) 2000-11-22 2000-11-22 Regenerating nitrogen oxides storage catalyst in exhaust gas channel of lean-burn I.C. engine involves using extrapolated oxygen-dependent signal
DE2000157938 DE10057938A1 (en) 2000-11-22 2000-11-22 Regenerating nitrogen oxides storage catalyst in I.C. engine involves extrapolating oxygen-dependent signal from oxygen-sensitive measuring device
DE10057936 2000-11-22
DE10057938 2000-11-22

Publications (4)

Publication Number Publication Date
EP1209332A2 EP1209332A2 (en) 2002-05-29
EP1209332A3 true EP1209332A3 (en) 2004-06-09
EP1209332B1 EP1209332B1 (en) 2008-06-25
EP1209332B8 EP1209332B8 (en) 2008-08-13

Family

ID=26007746

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010250407 Expired - Lifetime EP1209332B8 (en) 2000-11-22 2001-11-21 Method and device for regenerating an NOx storage catalytic converter

Country Status (2)

Country Link
EP (1) EP1209332B8 (en)
DE (1) DE50114044D1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10361286B4 (en) * 2003-12-24 2013-09-19 Daimler Ag Process for the regeneration of a nitrogen oxide storage catalyst
GB2424197B (en) * 2005-03-15 2009-01-14 Ford Global Tech Llc A method for adaptively controlling the regeneration of a lean nox trap
US8006480B2 (en) * 2007-07-25 2011-08-30 Eaton Corporation Physical based LNT regeneration strategy
GB2504975A (en) * 2012-08-15 2014-02-19 Gm Global Tech Operations Inc Method of controlling a DeSOx regeneration process of a Lean NOx Trap
FR3030620B1 (en) * 2014-12-22 2018-03-09 Renault S.A.S METHOD FOR PURGING A NITROGEN OXIDE TRAP AND ASSOCIATED MOTORIZATION DEVICE
US9631565B2 (en) * 2015-09-15 2017-04-25 Hyundai Motor Company Control method for improving nitrogen oxide purification performance

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0814031A (en) * 1994-06-24 1996-01-16 Hitachi Ltd Judgement on reduction and absorption performance of nox reduction catalyst in internal combustion engine, and reduction of nox
WO1999043420A1 (en) * 1998-02-27 1999-09-02 Volkswagen Aktiengesellschaft CONTROL OF AN NOx-ABSORBING CATALYTIC CONVERTER
EP0940570A1 (en) * 1998-01-09 1999-09-08 Ford Global Technologies, Inc. Method for regenerating a nitrogen oxide trap in the exhaust system of an internal combustion engine taking into account the exhaust gas mass flow
DE19844082C1 (en) * 1998-09-25 1999-10-14 Siemens Ag Regeneration of a nitrogen oxides storage catalyst used with lean burn engine
EP0997626A1 (en) * 1998-10-28 2000-05-03 Renault Method to control the purging of nitrogen oxides from an exhaust gas catalytic converter of an internal combustion engine
DE19915793A1 (en) * 1999-04-08 2000-10-19 Daimler Chrysler Ag Process for the desorption of a nitrogen oxide adsorber of an exhaust gas cleaning system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0814031A (en) * 1994-06-24 1996-01-16 Hitachi Ltd Judgement on reduction and absorption performance of nox reduction catalyst in internal combustion engine, and reduction of nox
EP0940570A1 (en) * 1998-01-09 1999-09-08 Ford Global Technologies, Inc. Method for regenerating a nitrogen oxide trap in the exhaust system of an internal combustion engine taking into account the exhaust gas mass flow
WO1999043420A1 (en) * 1998-02-27 1999-09-02 Volkswagen Aktiengesellschaft CONTROL OF AN NOx-ABSORBING CATALYTIC CONVERTER
DE19844082C1 (en) * 1998-09-25 1999-10-14 Siemens Ag Regeneration of a nitrogen oxides storage catalyst used with lean burn engine
EP0997626A1 (en) * 1998-10-28 2000-05-03 Renault Method to control the purging of nitrogen oxides from an exhaust gas catalytic converter of an internal combustion engine
DE19915793A1 (en) * 1999-04-08 2000-10-19 Daimler Chrysler Ag Process for the desorption of a nitrogen oxide adsorber of an exhaust gas cleaning system

Also Published As

Publication number Publication date
EP1209332B8 (en) 2008-08-13
EP1209332A2 (en) 2002-05-29
DE50114044D1 (en) 2008-08-07
EP1209332B1 (en) 2008-06-25

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