WO2002014658A1 - Procede et organe de commande pour determiner l'etat d'un catalyseur accumulateur d'oxydes d'azote (nox) - Google Patents

Procede et organe de commande pour determiner l'etat d'un catalyseur accumulateur d'oxydes d'azote (nox) Download PDF

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Publication number
WO2002014658A1
WO2002014658A1 PCT/DE2001/002715 DE0102715W WO0214658A1 WO 2002014658 A1 WO2002014658 A1 WO 2002014658A1 DE 0102715 W DE0102715 W DE 0102715W WO 0214658 A1 WO0214658 A1 WO 0214658A1
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WO
WIPO (PCT)
Prior art keywords
nox
mass flow
catalytic converter
storage catalytic
msnonk
Prior art date
Application number
PCT/DE2001/002715
Other languages
German (de)
English (en)
Inventor
Eberhard Schnaibel
Klaus Winkler
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2002014658A1 publication Critical patent/WO2002014658A1/fr

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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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/005—Electrical control of exhaust gas treating apparatus using models instead of sensors to determine operating characteristics of exhaust systems, e.g. calculating catalyst temperature instead of measuring it directly
    • 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
    • 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
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a method for determining the state of a nitrogen oxide (NOx) storage catalytic converter of an internal combustion engine, in particular of a motor vehicle.
  • a raw nitrogen oxide (NOx) mass flow upstream of the NOx storage catalytic converter is determined during a storage phase in which nitrogen oxides (NOx) emitted by the internal combustion engine are stored in the NOx storage catalytic converter.
  • a NOx mass flow is also determined behind the NOx storage catalytic converter.
  • the state of the NOx storage catalytic converter is determined from the two
  • the invention also relates to an internal combustion engine, in particular of a motor vehicle.
  • the internal combustion engine has a control unit and a nitrogen oxide (NOx) storage catalytic converter.
  • the internal combustion engine has first means for determining a raw nitrogen oxide (NOx) mass flow upstream of the NOx storage catalytic converter during a storage phase in which nitrogen oxides emitted by the internal combustion engine are stored in the NOx storage catalytic converter.
  • the internal combustion engine has second means for determining a NOx mass flow downstream of the NOx storage catalytic converter during the storage phase.
  • the control unit determines the state of the NOx storage catalytic converter from the two values determined for the raw NOx mass flow before and the NOx mass flow behind the NOx storage catalytic converter.
  • the present invention further relates to a control device for such an internal combustion engine.
  • the invention also relates to a control element, in particular a read-only memory, a random access memory or a flash memory, for such a control device of an internal combustion engine, in particular of a motor vehicle.
  • a program is stored on the control element and can be run on a computing device, in particular on a microprocessor.
  • nitrogen oxide (NOx) storage catalysts are used to store the nitrogen oxide (NOx) emissions emitted by the internal combustion engine during lean operation.
  • the NOx storage catalytic converter is in the so-called storage phase.
  • the efficiency of the NOx storage catalytic converter decreases with increasing duration of the storage phase, which leads to an increase in the NOx emissions behind the NOx storage catalytic converter.
  • the reason for the decrease in efficiency lies in the increase in the nitrogen oxide (NOx) fill level of the NOx storage catalytic converter.
  • the NOx fill level can be monitored and, after a predefined threshold value has been exceeded, a withdrawal phase or regeneration phase of the NOx
  • NOx nitrogen oxide
  • a reducing agent is added to the exhaust gas of the internal combustion engine, which reduces stored nitrogen oxides to nitrogen and oxygen.
  • a reducing agent for example, hydrocarbon (HC) and / or carbon monoxide (CO) can be used as the reducing agent, which can be generated by a rich setting of the fuel-air mixture in the exhaust gas (homogeneous operation of the internal combustion engine).
  • urea can also be added to the exhaust gas as a reducing agent. Ammonia from the urea is used to reduce the nitrogen oxide to oxygen and nitrogen. The ammonia can be obtained from a urea solution by hydrolysis.
  • the end of the withdrawal phase can be initiated when the majority of the nitrogen oxide has been removed from the NOx storage catalyst.
  • the state of the catalytic converter can change, in particular the storage capacity of the NOx storage catalytic converter can decrease.
  • the NOx storage catalytic converter can be caused, for example, by sulfur in the fuel be poisoned.
  • a quality factor of any system it is generally known from the prior art to calculate a quality factor of any system by dividing an output variable of the system by an input variable of the system.
  • a quality factor can theoretically also be used to determine the quality factor of a NOx storage catalytic converter.
  • the raw NOx mass flow is determined before and the NOx mass flow behind the NOx storage catalytic converter.
  • the quality factor can be determined by dividing the NOx mass flow downstream of the catalytic converter by the raw NOx mass flow upstream of the catalytic converter.
  • a quality factor calculated in this way does not allow a reliable statement about the condition of the catalytic converter, since - as already mentioned - the efficiency of a NOx storage catalytic converter decreases with increasing duration of the storage phase. Even at a stable operating point of the internal combustion engine, the known quality factor is not constant over time. If the quality factor is thus determined at the beginning of a storage phase (high storage rate) using the method known from the prior art, the condition of the catalytic converter is completely different than if the quality factor is determined towards the end of the storage phase (lower storage rate).
  • the start and end of the injection and withdrawal phases are not precisely defined in time, but are - as described above - determined again for each phase using certain parameters.
  • the method known from the prior art for determining the state of any system is therefore not suitable for determining the state of a NOx storage catalytic converter.
  • the present invention is based on the object Determine the state of a NOx storage catalytic converter reliably and precisely and with as little effort as possible.
  • the invention proposes, starting from the method of the type mentioned at the outset, that the two values determined for the NOx raw mass flow and the NOx mass flow behind the NOx storage catalytic converter are each integrated over a predefinable period of time and the state of the NOx Storage catalytic converter is determined from the integrated values for the NOx raw mass flow before and the NOx mass flow behind the NOx storage catalytic converter.
  • the invention it is therefore proposed not to determine a quality factor directly from the values determined for the raw NOx mass flow upstream and the NOx mass flow downstream of the NOx storage catalytic converter, but rather to initially integrate the two values over time.
  • the integral of the raw NOx mass flow over a period corresponds to the raw NOx emission supplied to the NOx storage catalytic converter within this period.
  • the integral of the NOx mass flow over a period of time also corresponds to the NOx emission of the catalyst within this period.
  • the start and end of the integration are within the saving phase.
  • the predeterminable time period therefore corresponds at most to the duration of the storage phase.
  • the integrated factor then becomes the quality factor per se
  • a NOx storage catalytic converter for controlling the storage and the regeneration phase anyway, so that no additional component is required to implement this development of the method according to the invention.
  • the raw NOx mass flow in front of the NOx storage catalytic converter can be measured by a NOx sensor arranged in front of the NOx storage catalytic converter.
  • the raw NOx mass flow is modeled upstream of the NOx storage catalytic converter.
  • the NOx raw mass flow can be taken, for example, from a NOx storage model or a NOx raw emission model.
  • the NOx raw mass flow is modeled in the models from the parameters describing the operating point of the internal combustion engine (e.g. the supplied fuel mass or air mass, the torque, etc.).
  • the modeled NOx raw mass flow can also be taken from a characteristic curve or a map.
  • the determined values can be integrated over any period of time with any start and end time. According to a preferred embodiment
  • Embodiment of the present invention proposes that the integration of the values be initiated at the beginning of the storage phase. According to another preferred embodiment of the present invention, it is proposed that the time period be selected so that the
  • Integration of the values is ended at the latest with the end of the saving phase. If the integration of the "values is initiated at the beginning of the injection phase and ended at the end of the injection phase, the quality factor can be determined with the greatest accuracy. The predeterminable time period therefore becomes the duration selected the storage phase.
  • the quality factor for determining the state of the NOx storage catalytic converter can be based on any mathematical algorithm, for example by means of addition or
  • the state of the NOx storage catalytic converter is determined by dividing the integrated values for the raw NOx mass flow before and the NOx mass flow behind the NOx storage catalytic converter.
  • the quality factor can be determined in particular according to one of the following equations:
  • the state of the NOx storage catalytic converter be determined from a difference between the integrated values for the raw NOx mass flow before and the NOx mass flow behind the NOx storage catalytic converter.
  • the quality factor can be determined in particular according to one of the following equations:
  • control element which is provided for a control unit of an internal combustion engine, in particular a motor vehicle.
  • a program is stored on the control, which is suitable on a computer, in particular on a microprocessor, executes and for carrying out the process of the invention '.
  • the invention is thus implemented by a program stored on the control element, so that this control element provided with the program represents the invention in the same way as the method for the execution of which
  • an electrical storage medium can be used as the control element, for example a read-only memory, a random access memory or a flash memory.
  • the control device integrates the two determined values for the NOx raw mass flow before and the NOx mass flow behind the NOx storage catalytic converter in each case over a predefinable period of time and determines the state of the NOx storage catalytic converter from the integrated values for ⁇ en NOx raw mass flow before and the NOx mass flow behind the NOx storage catalytic converter.
  • control device advance the two determined values for the NOx raw mass flow and the NOx mass flow downstream of the NOx storage catalytic converter each integrated over a predeterminable period of time and the state of the NOx storage catalytic converter determined from the integrated values for the raw NOx mass flow upstream and the NOx mass flow downstream of the NOx storage catalytic converter.
  • FIG. 1 shows a schematic block diagram of an internal combustion engine according to the invention in accordance with a preferred embodiment
  • FIG. 2 shows a time course of the integrals of raw NOx emission and NOx emission and a corresponding time course of the operating mode of the internal combustion engine
  • FIG. 3 shows a signal schedule of a method according to the invention in accordance with a preferred one
  • Figure 1 is a direct injection internal combustion engine
  • a piston 2 in a cylinder 3 can be moved back and forth.
  • the cylinder 3 is provided with a combustion chamber 4, which is delimited inter alia by the piston 2, an inlet valve 5 and an outlet valve 6.
  • An intake pipe 7 is coupled to the inlet valve 5 and an exhaust pipe 8 is coupled to the outlet valve 6.
  • a fuel injection valve 9 and a spark plug 10 protrude into the combustion chamber 4.
  • Fuel can be injected into the combustion chamber 4 via the injection valve 9.
  • the fuel in the combustion chamber 4 can be ignited with the spark plug 10.
  • a rotatable throttle valve 11 is accommodated in the intake pipe 7 and air can be supplied to the intake pipe 7. The amount of air supplied is dependent on the angular position of the throttle valve 11.
  • a catalytic converter 12 is housed in the exhaust pipe 8 and cleans the exhaust gases resulting from the combustion of the fuel.
  • the catalyst 12 is a nitrogen oxide
  • NOx storage catalytic converter 12 ' which is coupled to a 3-way catalytic converter 12' 'as an oxygen storage device.
  • the catalytic converter 12 can also comprise only one NOx storage catalytic converter 12 ′.
  • a control device 15 is acted upon by input signals 16, which represent operating variables of the internal combustion engine 1 measured by means of sensors.
  • the control unit 15 generates output signals 17 with which the behavior of the internal combustion engine 1 can be influenced via actuators or actuators.
  • the control device 15 is provided to control and / or regulate the operating variables of the internal combustion engine 1.
  • the control unit 15 is provided with a microprocessor 18 which has stored a program in a control element 19 which is suitable for the control and / or regulation mentioned perform.
  • the control element 19 is preferably designed as an electronic storage medium, in particular as a flash memory.
  • the throttle valve 11 is partially opened or closed depending on the desired torque.
  • the fuel is supplied from the injection valve 9 during a
  • Combustion chamber 4 injected.
  • the injected fuel is swirled by the air sucked in simultaneously via the throttle valve 11 and is thus distributed substantially uniformly in the combustion chamber 4. After that it will
  • Throttle valve 11 wide open.
  • the fuel is injected from the injection valve 9 into the combustion chamber 4 during a compression phase caused by the piston 2, specifically locally in the immediate vicinity 30 of the spark plug 10 and at a suitable time before the ignition point. Then we ignite the fuel with the aid of the spark plug 10, so that the piston 2 is driven in the now following working phase by the expansion of the ignited fuel.
  • the resulting torque 35 largely depends on the injected fuel mass in shift operation.
  • the shift operation is essentially provided for idling and part-load operation of the internal combustion engine 1. In shifts, La bda is usually> 1.
  • a storage phase E (see FIG. 2) of the NOx storage catalytic converter 12 ', the internal combustion engine 1 is operated in shift operation and the storage catalytic converter 12' is loaded with nitrogen oxides and the 3-way catalytic converter 12 '' with oxygen.
  • a regeneration phase R (see FIG. 2), the storage catalytic converter 12 'and the 3-way catalytic converter 12' 'are discharged again, so that they can again absorb nitrogen oxides or oxygen in a subsequent shift operation (storage phase).
  • a reducing agent is added to the exhaust gas upstream of the catalytic converter 12.
  • hydrocarbons (HC), carbon monoxide (CO) or urea can be used as reducing agents. Hydrocarbons and carbon monoxide are generated in the exhaust gas by a rich mixture setting (operation of the internal combustion engine in homogeneous operation).
  • Urea can come from one
  • Storage containers are metered into the exhaust gas in a controlled manner.
  • the reducing agent reduces the stored nitrogen oxides to nitrogen (N) and oxygen (0). These substances emerge from the catalytic converter 12, so that there is an excess of oxygen behind the catalytic converter 12 during the regeneration phase R, although the internal combustion engine 1 is operated with a rich fuel-air mixture (lack of oxygen).
  • An oxygen (02) sensor 13 is arranged in front of the catalytic converter 12 and a nitrogen (NOx) sensor 14 is arranged in the exhaust pipe 8 after the catalytic converter 12.
  • a lack of oxygen operation of the internal combustion engine 1 with a rich mixture
  • the oxygen storage locations of the catalytic converter 12 are initially almost all occupied.
  • the oxygen storage locations are successively freed from oxygen, which then exits the catalytic converter 12.
  • the catalyst 12 there is therefore initially an excess of oxygen after switching over to the regeneration phase R.
  • the total nitrogen oxide (N) stored in the storage catalytic converter 12 ' is reduced and the total oxygen (0) stored in the oxygen storage device 12''is removed, so that there is also a lack of oxygen behind the catalytic converter 12.
  • the end of the regeneration phase R can be initiated when the majority of the nitrogen oxide (NT) has been removed from the NOx storage catalytic converter 12'.
  • the condition of the catalytic converter 12 may change due to aging or poisoning of the NOx storage catalytic converter 12 ′, in particular the storage capacity of the NOx storage catalytic converter 12 ′ may decrease.
  • the NOx storage catalytic converter 12 ′ can, for example, be poisoned by sulfur in the fuel.
  • the method begins in a function block 30
  • a quality factor is then determined from the integrated values in a function block 33 using a simple mathematical algorithm as a measure of the state of the NOx storage catalytic converter 12 ′. For example, addition, subtraction, multiplication or division of the integrated values can be used as the algorithm. In particular, it is proposed to calculate the quality factor according to one or more of the following equations:
  • Mass flow takes into account the fact that the efficiency of a NOx storage catalytic converter 12 'decreases with increasing duration of the storage phase E.
  • the state of a NOx storage catalytic converter 12 ′ can be determined reliably and precisely.
  • the determination of the state with little effort a measured size msnonk and a ul

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

Abstract

L'invention concerne un procédé pour déterminer l'état d'un catalyseur accumulateur (12') d'oxydes d'azote (NOx) dans un moteur à combustion interne (1). Selon ce procédé, pendant une phase d'accumulation (E), dans laquelle des oxydes d'azote (NOx), éjectés par le moteur à combustion interne, sont accumulées dans le catalyseur accumulateur (12') de NOx, on détermine un débit massique brut (msnovk) d'oxydes d'azote (NOx) en amont du catalyseur accumulateur (12') de NOx et un débit massique (msnonk) de NOx en aval du catalyseur accumulateur de NOx (12') et on détermine l'état du catalyseur de stockage (12') de NOx à partir des deux valeurs (msnovk, msnonk) mesurées pour le débit massique brut de NOx en amont et pour le débit massique en aval du catalyseur accumulateur (12') de NOx.
PCT/DE2001/002715 2000-08-14 2001-07-19 Procede et organe de commande pour determiner l'etat d'un catalyseur accumulateur d'oxydes d'azote (nox) WO2002014658A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10039709A DE10039709A1 (de) 2000-08-14 2000-08-14 Verfahren und Steuergerät zum Bestimmen des Zustands eines Stickoxid (NOx)-Speicherkatalysators
DE10039709.3 2000-08-14

Publications (1)

Publication Number Publication Date
WO2002014658A1 true WO2002014658A1 (fr) 2002-02-21

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DE (1) DE10039709A1 (fr)
WO (1) WO2002014658A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004022934A1 (fr) * 2002-09-07 2004-03-18 Audi Ag Procede pour determiner le degre de vieillissement d'un catalyseur accumulateur d'oxyde d'azote d'un moteur a combustion interne, notamment d'une automobile
WO2004022952A1 (fr) * 2002-09-07 2004-03-18 Audi Ag Procede permettant de faire fonctionner un pot catalytique a accumulation de dioxyde d'azote d'un moteur a combustion interne notamment d'un vehicule automobile
WO2004022953A1 (fr) * 2002-09-07 2004-03-18 Audi Ag Procede pour commander le fonctionnement a melange pauvre d'un moteur a combustion interne presentant un catalyseur accumulateur d'oxyde d'azote, notamment d'une automobile
EP1590560A2 (fr) * 2003-01-22 2005-11-02 Audi Ag Procede pour faire fonctionner un catalyseur accumulateur de dioxyde d'azote sur un moteur a combustion interne de vehicule, notamment automobile
AT512760A1 (de) * 2012-03-21 2013-10-15 Avl List Gmbh Verfahren zum Betreiben einer Brennkraftmaschine
GB2513614A (en) * 2013-05-01 2014-11-05 Gm Global Tech Operations Inc Method of operating a lean NOx trap in an internal combustion engine

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DE10226873B4 (de) * 2002-06-12 2012-05-31 Volkswagen Ag Verfahren zur Steuerung der Betriebsartenwahl einer Verbrennungskraftmaschine
DE10235592B4 (de) * 2002-07-31 2013-04-04 Volkswagen Ag Verfahren zur Steuerung einer Brennkraftmaschine
DE10237949B4 (de) * 2002-08-20 2013-11-07 Volkswagen Ag Verfahren zum Betreiben einer direkteinspritzenden Brennkraftmaschine
DE10242914B4 (de) * 2002-09-16 2006-01-12 Siemens Ag Verfahren zur Adaption der NOx-Rohemission bei Verbrennungskraftmaschinen
DE10326932A1 (de) * 2003-06-16 2005-01-27 Audi Ag Verfahren zur Überprüfung eines Stickoxid-Sensors einer einen Stickoxid-Speicherkatalysator aufweisenden Brennkraftmaschine
JP4213548B2 (ja) * 2003-09-11 2009-01-21 株式会社日立製作所 エンジンの制御装置
DE102004002291B4 (de) * 2004-01-16 2010-01-07 Audi Ag Verfahren zum Betreiben einer Brennkraftmaschine eines Fahrzeuges, insbesondere eines Kraftfahrzeuges
DE102004009615B4 (de) * 2004-02-27 2008-03-13 Siemens Ag Verfahren zur Ermittlung der aktuellen Sauerstoffbeladung eines 3-Wege-Katalysators einer lambdageregelten Brennkraftmaschine
DE102007003547B4 (de) 2006-09-27 2018-06-14 Robert Bosch Gmbh Verfahren zur Diagnose eines eine Abgasbehandlungsvorrichtung enthaltenden Abgasbereichs einer Brennkraftmaschine und Vorrichtung zur Durchführung des Verfahrens
DE102009054817A1 (de) * 2009-12-17 2011-06-22 Ford Global Technologies, LLC, Mich. Verfahren und Vorrichtung zur "On-Board"-Felerdiagnose im Betrieb eines Verbrennungsmotors

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WO2000008316A2 (fr) * 1998-08-05 2000-02-17 Volkswagen Aktiengesellschaft REGULATION D'UN CATALYSEUR ACCUMULATEUR DE NOx
GB2342597A (en) * 1998-09-25 2000-04-19 Bosch Gmbh Robert Assessing deterioration of a NOx catalytic converter
EP1053777A1 (fr) * 1999-05-19 2000-11-22 Robert Bosch Gmbh Procédé de contrôle de l'activité d'un catalyseur d'accumulation des oxydes d'azote
EP1134376A2 (fr) * 2000-03-17 2001-09-19 Ford Global Technologies, Inc. Méthode améliorée pour la commande d'émission de gaz d'échappement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000008316A2 (fr) * 1998-08-05 2000-02-17 Volkswagen Aktiengesellschaft REGULATION D'UN CATALYSEUR ACCUMULATEUR DE NOx
GB2342597A (en) * 1998-09-25 2000-04-19 Bosch Gmbh Robert Assessing deterioration of a NOx catalytic converter
EP1053777A1 (fr) * 1999-05-19 2000-11-22 Robert Bosch Gmbh Procédé de contrôle de l'activité d'un catalyseur d'accumulation des oxydes d'azote
EP1134376A2 (fr) * 2000-03-17 2001-09-19 Ford Global Technologies, Inc. Méthode améliorée pour la commande d'émission de gaz d'échappement

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004022934A1 (fr) * 2002-09-07 2004-03-18 Audi Ag Procede pour determiner le degre de vieillissement d'un catalyseur accumulateur d'oxyde d'azote d'un moteur a combustion interne, notamment d'une automobile
WO2004022952A1 (fr) * 2002-09-07 2004-03-18 Audi Ag Procede permettant de faire fonctionner un pot catalytique a accumulation de dioxyde d'azote d'un moteur a combustion interne notamment d'un vehicule automobile
WO2004022953A1 (fr) * 2002-09-07 2004-03-18 Audi Ag Procede pour commander le fonctionnement a melange pauvre d'un moteur a combustion interne presentant un catalyseur accumulateur d'oxyde d'azote, notamment d'une automobile
DE10241497B3 (de) * 2002-09-07 2004-04-22 Audi Ag Verfahren zur Steuerung des Magerbetriebs einer einen Stickoxid-Speicherkatalysator aufweisenden Brennkraftmaschine, insbesondere eines Kraftfahrzeuges
EP1590560A2 (fr) * 2003-01-22 2005-11-02 Audi Ag Procede pour faire fonctionner un catalyseur accumulateur de dioxyde d'azote sur un moteur a combustion interne de vehicule, notamment automobile
AT512760A1 (de) * 2012-03-21 2013-10-15 Avl List Gmbh Verfahren zum Betreiben einer Brennkraftmaschine
AT512760B1 (de) * 2012-03-21 2014-05-15 Avl List Gmbh Verfahren zum Betreiben einer Brennkraftmaschine
GB2513614A (en) * 2013-05-01 2014-11-05 Gm Global Tech Operations Inc Method of operating a lean NOx trap in an internal combustion engine

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