FR2856733A1 - Desulfurizing at least one catalyzer downstream of IC engine where oxygen storage capacity of catalyzer is criterion for desulfurizing - Google Patents

Desulfurizing at least one catalyzer downstream of IC engine where oxygen storage capacity of catalyzer is criterion for desulfurizing

Info

Publication number
FR2856733A1
FR2856733A1 FR0406985A FR0406985A FR2856733A1 FR 2856733 A1 FR2856733 A1 FR 2856733A1 FR 0406985 A FR0406985 A FR 0406985A FR 0406985 A FR0406985 A FR 0406985A FR 2856733 A1 FR2856733 A1 FR 2856733A1
Authority
FR
France
Prior art keywords
catalyzer
lambda
storage capacity
engine
oxygen storage
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
FR0406985A
Other languages
French (fr)
Other versions
FR2856733B1 (en
Inventor
Matthias Holz
Michael Zillmer
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
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of FR2856733A1 publication Critical patent/FR2856733A1/en
Application granted granted Critical
Publication of FR2856733B1 publication Critical patent/FR2856733B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • F01N3/0807—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
    • F01N3/0864—Oxygen
    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust 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
    • 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
    • F01N3/0828—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
    • 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
    • F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
    • F01N3/0885—Regeneration of deteriorated absorbents or adsorbents, e.g. desulfurization of NOx traps
    • 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
    • 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
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/03—Monitoring or diagnosing the deterioration of exhaust systems of sorbing activity of adsorbents or absorbents
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
    • 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
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0422—Methods of control or diagnosing measuring the elapsed time
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • F01N2900/1612—SOx amount trapped in catalyst
    • 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
    • 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

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

Abstract

The need for desulfurization is determined as a function of at least one criterion. During desulfurization, the catalyzers (18, 20) to be desulfurized are fed, at a raised temperature, with a rich exhaust gas with lambda 1. At least one criterion determining the need to desulfurize is the oxygen storage capacity of a catalyzer in the system, specifically the catalyzer to be desulfurized. An internal combustion engine (10) can operate with a poor mixture. The oxygen storage capacity of the catalyzer(s) together or individually is determined using the evolution of oxygen concentration in the exhaust gases downstream of the last catalyzer in the system. The oxygen concentration is detected and evaluated after a change in the engine lambda (lambda mot) from a predetermined poor lambda (lambda m) to a predetermined rich lambda (lambda f) and/or vice versa. A time lapse flows from the change in engine lambda until a leap in lambda downstream of the catalyzers. When a catalyzer near the engine has reached its extinction temperature and a catalyzer further from the engine has not yet reached its extinction temperature, the oxygen storage capacity of the catalyzer near the engine can be determined. The total oxygen storage capacity of the catalyzers can be determined when they have all reached their extinction temperatures, and thus the capacity of the catalyzer further from the engine can be determined as the difference between the two. The oxygen concentration downstream of the catalyzers is measured using a lambda probe or NOx detector. The catalyzer to be desulfurized is a NOx accumulator upstream of which a pre-catalyzer is mounted. The need for desulfurization is determined by measuring oxygen storage capacity, NOx storage capacity and/or the rate of conversion of NOx in the catalyzer to be desulfurized and/or the sulfur present and/or a time lapse since the previous desulfurization. An independent claim is made for a device to carry out the above process, where the exhaust catalyst system includes a device for determining the oxygen storage capacity of the catalyzers and determining the need for desulfurization is carried out as a function of the oxygen storage capacity among other criteria. The device comprises an oxygen measuring device, in particular a lambda probe or NOx detector placed downstream of the last catalyzer. A control unit (26) contains an algorithm for guiding the desulfurization.
FR0406985A 2003-06-30 2004-06-25 PROCESS AND DEVICE FOR DESULFURIZING A CATALYST Expired - Fee Related FR2856733B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10330367A DE10330367A1 (en) 2003-06-30 2003-06-30 Method and device for desulfurization of a catalyst

Publications (2)

Publication Number Publication Date
FR2856733A1 true FR2856733A1 (en) 2004-12-31
FR2856733B1 FR2856733B1 (en) 2012-03-09

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FR0406985A Expired - Fee Related FR2856733B1 (en) 2003-06-30 2004-06-25 PROCESS AND DEVICE FOR DESULFURIZING A CATALYST

Country Status (2)

Country Link
DE (1) DE10330367A1 (en)
FR (1) FR2856733B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2909411A1 (en) * 2006-12-04 2008-06-06 Renault Sas Vehicle engine controlling method, involves carrying out sulphur poisoning diagnosis of oxide trap, if sulphur purging conditions such as value for diagnosing fault of oxide trap is higher than sum of threshold and margin, are satisfied
US11549418B1 (en) 2021-12-20 2023-01-10 Caterpillar Inc. Desulfation of aftertreatment component

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2908669B1 (en) * 2006-11-20 2009-02-27 Renault Sas SYSTEM AND METHOD FOR REMOVING SULFUR SOX OXIDES FROM A CATALYTIC TRAPPING DEVICE OF NITROGEN OXIDES
DE102007005682B3 (en) * 2007-02-05 2008-04-17 Siemens Ag Method for operating internal combustion engine comprising exhaust gas catalytic converter, involves arranging exhaust tube and another exhaust tube for determining hydrocarbon grade depending upon measuring signal
DE102007005680B3 (en) * 2007-02-05 2008-04-17 Siemens Ag Petrol-internal combustion engine operating method for motor vehicle, involves adjusting control parameter and/or trim-reference value of controller depending on correction value when error indicator is representative for component error
DE102007005684B3 (en) * 2007-02-05 2008-04-10 Siemens Ag Internal-combustion engine operating method for motor vehicle, involves determining high carbon quality value, which is representative for oxygen storage capability of catalytic converter, and determining nitrogen oxide quality value
CN106093286A (en) * 2016-05-25 2016-11-09 西安石油大学 A kind of triazine sulfur elimination sulfur removal effectiveness dynamic evaluation method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19843859A1 (en) * 1998-09-25 2000-03-30 Bosch Gmbh Robert Improvement in exhaust gas composition, following degradation due to sulfur content, is brought about by rich regeneration when either oxygen storage capacity or total sulfur input falls outside set threshold.
EP1191196A2 (en) * 2000-08-29 2002-03-27 Ford Global Technologies, Inc. NOx trap capacity
US20020139109A1 (en) * 2001-03-28 2002-10-03 Masahiro Sakanushi Catalyst deterioration detecting system for an automobile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19843859A1 (en) * 1998-09-25 2000-03-30 Bosch Gmbh Robert Improvement in exhaust gas composition, following degradation due to sulfur content, is brought about by rich regeneration when either oxygen storage capacity or total sulfur input falls outside set threshold.
EP1191196A2 (en) * 2000-08-29 2002-03-27 Ford Global Technologies, Inc. NOx trap capacity
US20020139109A1 (en) * 2001-03-28 2002-10-03 Masahiro Sakanushi Catalyst deterioration detecting system for an automobile

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2909411A1 (en) * 2006-12-04 2008-06-06 Renault Sas Vehicle engine controlling method, involves carrying out sulphur poisoning diagnosis of oxide trap, if sulphur purging conditions such as value for diagnosing fault of oxide trap is higher than sum of threshold and margin, are satisfied
WO2008068226A1 (en) * 2006-12-04 2008-06-12 Renault S.A.S Method for diagnosing that a nitrogen oxides trap has been poisoned
US11549418B1 (en) 2021-12-20 2023-01-10 Caterpillar Inc. Desulfation of aftertreatment component

Also Published As

Publication number Publication date
DE10330367A1 (en) 2005-03-03
FR2856733B1 (en) 2012-03-09

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Effective date: 20140228