EP1203144B1 - Verfahren zur regelung eines arbeitsmodus einer verbrennungskraftmaschine - Google Patents
Verfahren zur regelung eines arbeitsmodus einer verbrennungskraftmaschine Download PDFInfo
- Publication number
- EP1203144B1 EP1203144B1 EP00949277A EP00949277A EP1203144B1 EP 1203144 B1 EP1203144 B1 EP 1203144B1 EP 00949277 A EP00949277 A EP 00949277A EP 00949277 A EP00949277 A EP 00949277A EP 1203144 B1 EP1203144 B1 EP 1203144B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion engine
- catalyst
- internal combustion
- operating mode
- temperature
- 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.)
- Expired - Lifetime
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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
-
- 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
- F02D41/1444—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
- F02D2200/0802—Temperature of the exhaust gas treatment apparatus
Definitions
- the invention relates to a method for regulating a working mode of an internal combustion engine, which is followed by at least one NO x storage catalytic converter.
- an internal combustion engine which allow the working mode to be controlled by at least temporarily influencing at least one operating parameter of the internal combustion engine. It is also known to arrange an NO x storage catalytic converter in an exhaust gas duct for cleaning an exhaust gas of the internal combustion engine.
- a content of a gas component in the exhaust gas can be detected via sensors additionally arranged in the exhaust gas duct, or a temperature or a temperature profile can also be tracked.
- such variables can also be predicted using suitable models, so that it is ultimately possible to quantitatively record selected operating parameters of the internal combustion engine, such as an exhaust gas temperature, a raw emission of selected gas components, a space velocity of the exhaust gas, a vehicle speed, an engine speed or a requested load.
- a current catalytic converter state can be determined in the same way.
- a catalyst temperature, an NO x are - or SO x -BeladungsSullivan, an NO x storage capacity, a thermal capacity of the storage catalyst or the like detectable.
- the means for controlling the working mode of the internal combustion engine and the methods for detecting the operating parameters of the internal combustion engine and the current state of the catalyst are known and are therefore not explained in more detail in connection with this description.
- the internal combustion engine is in a so-called lean working mode with ⁇ > 1 (lean operation).
- the NO x formed, inter alia, during the combustion process is absorbed as nitrate by the NO x storage catalytic converter until a NO x desorption temperature is reached or a NO x storage capacity is exhausted.
- a change to a working mode with ⁇ ⁇ 1 (regeneration mode) must take place before this time. Under such conditions, the absorbed NO x is desorbed again and reacted on a catalyst component of the storage catalyst with reducing agents such as CO, HC or H 2 .
- the proportion of reducing agents increases significantly in the regeneration mode during the combustion process, since in this case there is a deficit of oxygen in the air-fuel mixture.
- the object of the method according to the invention is to regulate the To make the working mode of the internal combustion engine much more flexible, so that even after the catalyst temperature is exceeded above the limit temperature the lean operation can be maintained as long as possible.
- the method according to the invention at least flows one of the operating parameters of the internal combustion engine and / or the current one Catalyst state in a map over which the working mode of the Internal combustion engine is determined. This way, in a very simple way Way the boundary conditions (current catalyst condition and operating parameters of the Internal combustion engine) are taken into account when selecting the working mode.
- a duration of a work mode can take into account the current state of the catalyst and the Operating parameters of the internal combustion engine can be determined.
- a frequency for the change from regeneration mode to lean mode and back determine.
- NO x reduction measure by influencing the operating parameters of the internal combustion engine to take.
- the NO x reduction measure can also be initiated as a function of the NO x emission detected downstream of the storage catalytic converter.
- FIG. 10 An arrangement 10 of a NO x storage catalytic converter 12 in an exhaust gas duct 14 of an internal combustion engine 16 is shown schematically in FIG. Furthermore, sensors 18, 20 are arranged in the exhaust gas duct, which make it possible to determine a content of a gas component in the exhaust gas (gas sensors) or to record a temperature (temperature sensors). The number, position and type of such sensors 18, 20 are highly variable. A detection and evaluation of the signals of such sensors 18, 20 is known and will not be explained in more detail in the context of this description. In addition, it is possible in a known manner to calculate the content of the gas components or the temperature in selected areas of the arrangement 10 using suitable models.
- a representation of the Internal combustion engine associated means dispensed by at least one temporarily influencing at least one operating parameter of the Allow internal combustion engine to regulate a working mode.
- Such Means for influencing the operating parameters are well known and are therefore not explained in more detail here. It is also known to be a To detect catalyst temperature, for example by means of the sensor 20, and the Regulation of the operating parameters of the internal combustion engine 16 depending on perform from this catalyst temperature.
- the internal combustion engine 16 If there is an excess of oxygen in excess of a fuel in the internal combustion engine 16 during a combustion process, the internal combustion engine is in a working mode with ⁇ > 1 (lean operation). During the lean operation, the NO x formed during the combustion process is absorbed in the NO x storage catalytic converter 12, namely until either a NO x desorption temperature is reached or a NO x storage capacity is exceeded.
- reducing agents such as CO, HC or H 2 are generally produced to an increased extent.
- regeneration mode the absorbed NO x is swapped out again (NO x desorption) and converted in the NO x storage catalytic converter 12 with the aid of the reducing agents.
- the NO x storage capacity of the NO x storage catalytic converter 12 is temperature-dependent.
- the internal combustion engine 16 in the method according to the invention is therefore set to the working mode with ⁇ 1 1 (regeneration mode) after a predeterminable limit temperature GT has been exceeded if further prerequisites explained below have been met.
- ⁇ 1 1 regeneration mode
- a course of the catalyst temperature during such a regulation of the working mode of the internal combustion engine 16 is shown as an example in FIG. 2.
- a switch is made to the working mode with ⁇ div 1 (rich phase t f1 ) due to an increased power requirement on the internal combustion engine 16.
- the limit temperature GT of the catalytic converter is exceeded in the course of the rich phase t f1 .
- a current catalytic converter state and / or at least one operating parameter of the internal combustion engine 16 is continuously detected.
- Selected operating parameters of the internal combustion engine 16 can be, for example, an exhaust gas temperature, a raw emission of selected gas components, a space velocity of the exhaust gas, a vehicle speed, an engine speed or a requested load.
- the catalytic converter state can be determined via the sensors 18, 20 or via suitable models and includes, for example, a NO x or SO x loading state, the NO x storage capacity, a heat capacity of the storage catalytic converter or the catalytic converter temperature.
- a NO x or SO x loading state includes, for example, a NO x or SO x loading state, the NO x storage capacity, a heat capacity of the storage catalytic converter or the catalytic converter temperature.
- the work mode of the internal combustion engine 16 is assigned via a map, so that, for example, a change in lean operation can be initiated from a time T 1 due to the permissibility of a lean work mode in the operation of the internal combustion engine.
- the catalyst temperature is above the limit temperature GT and only drops below this threshold from a time T 2 .
- the regeneration operation of the internal combustion engine 16 is here significantly shortened compared to the known methods in which the storage catalytic converter 12 is acted upon with rich exhaust gas at least over the phases t m2 and t f1 , with the duration of the lean phase t m2 additionally due to the higher exhaust gas temperatures in the regeneration operation is extended.
- FIG. 3 shows a flowchart for regulating the working mode of the internal combustion engine 16 according to the method according to the invention, taking into account the NO x emission downstream of the storage catalytic converter 12.
- a first step S1 the operating parameters of the internal combustion engine, for example the space velocity of the exhaust gas, the exhaust gas temperature, the requested load or the NO x raw emission, are recorded quantitatively.
- the current catalytic converter state is measured in a second step S2, for example via sensors 18, 20, or calculated using suitable models. If the current catalyst temperature exceeds the limit temperature (step S3), this can lead to the initiation of a map-controlled change in the setting of the working mode of the internal combustion engine 16 in a step S4.
- selected operating parameters of the internal combustion engine as well as selected parameters of the current catalytic converter state such as a NO x desorption characteristic for a current NO x or SO x loading state, flow into the characteristic diagram.
- step S4 it is determined on the basis of the parameters made available whether it makes sense at all to switch internal combustion engine 16 to lean operation or to leave it in lean operation. For example, it can first be checked whether it is possible with a motor to allow the working mode with ⁇ > 1 with regard to the requested load. It is also conceivable to calculate a maximum permissible duration of a cooling phase, ie the lean operation, until the regeneration operation has to be stopped, based on a cumulative raw NO x emission predicted over a predeterminable period of time and the determined NO x storage capacity. If the duration of the cooling phase falls below a predefinable minimum duration, the regeneration operation is started.
- a NO x emission detected in a step S6 and accumulated over a predefinable period of time downstream of the NO x storage catalytic converter 12 is compared with a predefinable threshold value for the NO x emission downstream of the NO x storage catalytic converter 12. If the cumulative emission exceeds the threshold value, it can be checked in a step S7 whether a NO x reduction measure can be taken by influencing the operating parameters of the internal combustion engine 16. If this is not possible, the regeneration mode is set with ⁇ ⁇ 1. If the NO x reduction measure is possible or if the threshold value of the cumulative emission has not yet been exceeded, lean operation with ⁇ > 1 is possible. Step S5 makes it possible to continuously check the accumulated NO x emission downstream of the storage catalytic converter 12.
- a threshold value for a cumulative raw NO x emission upstream of the NO x storage catalytic converter 22 can also be specified and, if possible, the NO x reduction measure can be initiated if this threshold value is exceeded.
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
Description
- Figur 1
- eine Anordnung eines NOx-Speicherkatalysators in einem Abgaskanal einer Verbrennungskraftmaschine;
- Figur 2
- einen Verlauf einer Katalysatortemperatur und
- Figur 3
- ein Flussdiagramm eines Ausführungsbeispieles des erfindungsgemäßen Verfahrens zur Regelung eines Arbeitsmodus der Verbrennungskraftmaschine.
Claims (8)
- Verfahren zur Regelung eines Arbeitsmodus einer Verbrennungskraftmaschine (16), wobei der Verbrennungskraftmaschine (16) Mittel zugeordnet sind, die durch eine zumindest temporäre Beeinflussung wenigstens eines Betriebsparameters der Verbrennungskraftmaschine (16) die Regelung des Arbeitsmodus erlauben, und wobei(a) die Regelung des Arbeitsmodus in Abhängigkeit von einer Katalysatortemperatur wenigstens eines, in einem Abgaskanal der Verbrennungskraftmaschine (16) angeordneten NOx-Speicherkatalysators (12) erfolgt,(b) der Arbeitsmodus der Verbrennungskraftmaschine (16) beim Überschreiten der Katalysatortemperatur über eine vorgebbare Grenztemperatur (GT) in Abhängigkeit von wenigstens einem Betriebsparameter der Verbrennungskraftmaschine (16) und/oder einem aktuellen Katalysatorzustand des NOx-Speicherkatalysators (12) eingestellt wird, und(c) ein magerer Arbeitsmodus mit λ > 1 bis zum Überschreiten eines vorgebbaren Schwellenwertes für eine über einen vorgebbaren Zeitraum kumulierte NOx-Emission stromab des NOx-Speicherkatatysators (12) aufrechterhalten wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der wenigstens eine Betriebsparameter der Verbrennungskraftmaschine (16) und/oder der aktuelle Katalysatorzustand in ein Kennfeld einfließt und über das Kennfeld der Arbeitsmodus der Verbrennungskraftmaschine (16) bestimmt wird.
- Verfahren nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, dass die Betriebsparameter der Verbrennungskraftmaschine (16) zumindest eine Abgastemperatur, eine Motordrehzahl, eine angeforderte Last, eine Raumgeschwindigkeit eines Abgases, einen Gehalt wenigstens einer Gaskomponente im Abgas stromauf des wenigstens einen NOx-Speicherkatalysators (12) oder eine Fahrzeuggeschwindigkeit umfassen.
- Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, dass der aktuelle Katalysatorzustand die Katalysatortemperatur, eine NOx-Speicherfähigkeit, eine NOx-Konvertierungsrate oder eine Wärmeleitfähigkeit des Speicherkatalysators umfasst.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Dauer des mageren Arbeitsmodus mit λ > 1 in Abhängigkeit von dem aktuellen Katalysatorzustand und den Betriebsparametem der Verbrennungskraftmaschine (16) bestimmt wird.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass beim Unterschreiten der berechneten Dauer des mageren Arbeitsmodus mit λ > 1 unter eine vorgebbare Mindestdauer ein Regenerations-Arbeitsmodus der Verbrennungskraftmaschine (16) mit λ ≤ 1 eingestellt wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Wobblefrequenz für einen Wechsel des Arbeitsmodus in Abhängigkeit von dem aktuellen Katalysatorzustand und den Betriebsparametern der Verbrennungskraftmaschine (16) bestimmt wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass beim Überschreiten eines vorgebbaren Schwellenwertes für eine NOx-Rohemission, der NOx-Emission oder der kumulierten NOx-Emission stromab des NOx-Speicherkatalysators (12) eine NOx-Minderungsmaßnahme durch eine Beeinflussung der Betriebsparameter der Verbrennungskraftmaschine (16) ergriffen wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19933712 | 1999-07-19 | ||
DE19933712A DE19933712A1 (de) | 1999-07-19 | 1999-07-19 | Verfahren zur Regelung eines Arbeitsmodus einer Verbrennungskraftmaschine |
PCT/EP2000/006417 WO2001006105A1 (de) | 1999-07-19 | 2000-07-06 | Verfahren zur regelung eines arbeitsmodus einer verbrennungskraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1203144A1 EP1203144A1 (de) | 2002-05-08 |
EP1203144B1 true EP1203144B1 (de) | 2004-10-06 |
Family
ID=7915231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00949277A Expired - Lifetime EP1203144B1 (de) | 1999-07-19 | 2000-07-06 | Verfahren zur regelung eines arbeitsmodus einer verbrennungskraftmaschine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1203144B1 (de) |
DE (2) | DE19933712A1 (de) |
WO (1) | WO2001006105A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10117434A1 (de) * | 2001-04-03 | 2002-10-10 | Volkswagen Ag | Verfahren zur Steuerung eines Betriebsmodus einer magerlauffähigen Verbrennungskraftmaschine |
DE10152670A1 (de) * | 2001-10-05 | 2003-05-22 | Volkswagen Ag | Verfahren und Vorrichtung zur Steuerung einer magerlauffähigen Verbrennungskraftmaschine |
DE10221568A1 (de) * | 2002-05-08 | 2003-12-04 | Volkswagen Ag | Verfahren zur Steuerung eines NO¶x¶-Speicherkatalysators |
DE10226873B4 (de) * | 2002-06-12 | 2012-05-31 | Volkswagen Ag | Verfahren zur Steuerung der Betriebsartenwahl einer Verbrennungskraftmaschine |
DE10248527A1 (de) * | 2002-10-14 | 2004-07-01 | Volkswagen Ag | Verfahren sowie Vorrichtung zur Steuerung einer magerlauffähigen Verbrennungskraftmaschine |
DE10249610B4 (de) * | 2002-10-18 | 2010-10-07 | Volkswagen Ag | Verfahren und Vorrichtung zur Steuerung eines NOx-Speicherkatalysators |
DE10323979B4 (de) * | 2003-05-27 | 2014-04-30 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Abgasbehandlungsvorrichtung für einen Verbrennungsmotor eines Kraftfahrzeugs |
DE10358197A1 (de) * | 2003-12-12 | 2005-07-14 | Robert Bosch Gmbh | Verfahren zum Optimieren des Kraftstoffverbrauchs einer Brennkraftmaschine |
US7401462B2 (en) | 2004-03-30 | 2008-07-22 | General Motors Corporation | Control strategy for lean NOx trap regeneration |
DE102007011487A1 (de) * | 2007-03-07 | 2008-09-11 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Verfahren zur Überwachung der Funktionsfähigkeit eines Partikelfilters, sowie entsprechendes Abgassystem |
DE102020212725A1 (de) | 2020-10-08 | 2022-04-14 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren zum Betreiben einer Brennkraftmaschine, Recheneinheit und Computerprogramm |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4203219A1 (de) * | 1992-02-05 | 1993-08-12 | Basf Ag | Verfahren zur stickoxidminderung in abgasen durch gesteuerte nh(pfeil abwaerts)3(pfeil abwaerts)-zugabe |
DE4211092A1 (de) * | 1992-04-03 | 1993-10-07 | Bosch Gmbh Robert | Verfahren und Vorrichtung zum Beurteilen der Funktionsfähigkeit eines Katalysators |
JP2605586B2 (ja) * | 1992-07-24 | 1997-04-30 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JPH06213042A (ja) * | 1992-12-21 | 1994-08-02 | Ford Motor Co | 内燃機関用排気ガスセンサシステムおよび酸素レベル信号供給工程 |
DE19645202B4 (de) * | 1995-12-23 | 2006-05-11 | Volkswagen Ag | Verfahren zur Überwachung der Konvertierungsrate eines Abgaskatalysators für eine Brennkraftmaschine |
DE19607151C1 (de) * | 1996-02-26 | 1997-07-10 | Siemens Ag | Verfahren zur Regeneration eines NOx-Speicherkatalysators |
US5722236A (en) * | 1996-12-13 | 1998-03-03 | Ford Global Technologies, Inc. | Adaptive exhaust temperature estimation and control |
DE19705335C1 (de) * | 1997-02-12 | 1998-09-17 | Siemens Ag | Verfahren zur Regeneration eines Speicherkatalysators |
DE19716275C1 (de) * | 1997-04-18 | 1998-09-24 | Volkswagen Ag | Verfahren zur Stickoxidreduzierung im Abgas einer Brennkraftmaschine |
DE19729676C5 (de) * | 1997-07-11 | 2004-04-15 | Ford Global Technologies, LLC (n.d.Ges.d. Staates Delaware), Dearborn | Verfahren zum Betrieb eines Verbrennungsmotors zum Schutz einer Abgasbehandlungseinrichtung |
DE19731624A1 (de) * | 1997-07-23 | 1999-01-28 | Volkswagen Ag | Verfahren und Vorrichtung zur Überwachung der De-Sulfatierung bei NOx-Speicherkatalysatoren |
DE19739848A1 (de) * | 1997-09-11 | 1999-03-18 | Bosch Gmbh Robert | Brennkraftmaschine insbesondere für ein Kraftfahrzeug |
JP4346118B2 (ja) * | 1997-10-08 | 2009-10-21 | 株式会社デンソー | 内燃機関の触媒温制御装置 |
DE19748971A1 (de) * | 1997-11-06 | 1999-05-12 | Opel Adam Ag | System zum Schutz einer Katalysatoranordnung im Abgasstrang einer fremdgezündeten Brennkraftmaschine vor Überhitzung |
DE19753718C1 (de) * | 1997-12-04 | 1999-07-08 | Daimler Chrysler Ag | Verfahren zum Betreiben eines Dieselmotors |
-
1999
- 1999-07-19 DE DE19933712A patent/DE19933712A1/de not_active Withdrawn
-
2000
- 2000-07-06 EP EP00949277A patent/EP1203144B1/de not_active Expired - Lifetime
- 2000-07-06 DE DE50008146T patent/DE50008146D1/de not_active Expired - Lifetime
- 2000-07-06 WO PCT/EP2000/006417 patent/WO2001006105A1/de active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
DE19933712A1 (de) | 2001-05-17 |
DE50008146D1 (de) | 2004-11-11 |
WO2001006105A1 (de) | 2001-01-25 |
EP1203144A1 (de) | 2002-05-08 |
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