EP1367245A2 - Verfahren zum Betreiben eines Kraftfahrzeuges mit NOx-Speicherkatalysator - Google Patents
Verfahren zum Betreiben eines Kraftfahrzeuges mit NOx-Speicherkatalysator Download PDFInfo
- Publication number
- EP1367245A2 EP1367245A2 EP03005886A EP03005886A EP1367245A2 EP 1367245 A2 EP1367245 A2 EP 1367245A2 EP 03005886 A EP03005886 A EP 03005886A EP 03005886 A EP03005886 A EP 03005886A EP 1367245 A2 EP1367245 A2 EP 1367245A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- catalyst
- state variable
- internal combustion
- combustion engine
- sulfur
- 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.)
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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
- F02D41/021—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
- 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
- F02D2200/0811—NOx storage efficiency
-
- 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
- F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
- F02D2200/501—Vehicle speed
Definitions
- the invention relates to a method for operating a motor vehicle a lean-burn internal combustion engine according to the preamble of claim 1
- NOx storage catalytic converters are modern with lean running Internal combustion engines equipped motor vehicles to reduce the Nitrogen oxide emissions used. As is known, such a NOx storage catalytic converter can due to sulfur contained in the fuel or engine oil Lose all or part of NOx storage and regeneration efficiency. one Such sulfur poisoning can be caused by desulfurization of the NOx storage catalyst be counteracted. The desulfurization can be on natural way by driving at high loads and catalyst temperatures, for example, a highway trip. Desulfurization can also be active done by an operation of the internal combustion engine through which in connection with an at least temporary exhaust gas enrichment, the NOx storage catalyst temperature is increased.
- the well-known active desulfurization processes for NOx storage catalysts rely on increased exhaust gas temperatures of over 550 degrees Celsius in particular> 620 ° C and an exhaust gas composition with a To produce lambda value ⁇ 1 for a given desulfurization time.
- An internal combustion engine system is described in DE 197 47 22 2 C1 an internal combustion engine with an associated engine exhaust system, one Exhaust gas purification system with a NOx storage catalytic converter arranged in the engine exhaust line, a lambda sensor to record the engine air ratio and means for periodically desulfurizing the NOx storage catalyst increased temperature and rich catalyst-air ratio.
- the Desulfating agents include, in particular, secondary air supply means Feeding secondary air into the NOx storage catalytic converter. The fed Secondary air is used to increase the temperature of the NOx storage catalytic converter used during desulfation.
- EP 0860 595 A1 also describes a process for desulfurization Nitrogen oxide trap known in the exhaust system of an internal combustion engine, in which one of the current SOx uptake rate of the nitrogen oxide trap and the corresponding value amount of SOx absorbed by the nitrogen oxide trap is determined and if the amount of SOx ingested has reached a threshold Desulfurization cycle is initiated.
- the nitrogen oxide trap for one predetermined time brought to a predetermined temperature and the Internal combustion engine during this time with a specified air / Fuel ratio operated.
- the known active desulfurization processes are therefore characterized by a sulfur concentration-dependent additional consumption of fuel and increased development and application effort. Both translate into increased Production, operation and maintenance costs for one with a NOx catalytic converter equipped motor vehicle.
- the problem underlying the invention is therefore a simple and safe one Method for operating a motor vehicle with a lean-running system Internal combustion engine with extensive availability of low sulfur or to enable sulfur-free fuel.
- the problem is characterized by the features of the independent Claim 1 solved.
- the starting point is the idea that Operate the internal combustion engine in a manner that takes active measures Desulphurization of the NOx storage catalyst can be omitted.
- Desulphurization of the NOx storage catalyst can be omitted.
- a desulfurization may be required. This means that both the development and application effort as well as the average fuel consumption as a result of desulfurization compared to previously known methods with comparable security reduced.
- the invention therefore lies in a process for the desulfurization of a NOx storage catalytic converter of a brake engine of a motor vehicle with a control unit
- Desulphurization need determines an operator (e.g. driver and / or workshop personnel) and / or only temporarily with the motor vehicle connecting reading device (e.g. diagnostic device) indicates for execution (carried out manually or initiated by the reading device) of the desulfurization.
- an operator e.g. driver and / or workshop personnel
- the motor vehicle connecting reading device e.g. diagnostic device
- Passive desulphurization is used to create one Sulfur discharge without a change in engine efficiency compared to that to overcome of driving resistance understood.
- passive Desulfurization understood the effect of a sulfur discharge when the Motor efficiency change over at least 30%, but preferably more than 45% or 60% or 75%, but especially 90% of the timeline in the new one European driving cycle (NEDC) does not reach a sufficiently high desulfurization temperature leads.
- a catalyst temperature for the is not sufficient current NOx storage catalysts with alkaline earth storage of less than 550 Degrees Celsius, preferably 580 degrees Celsius, particularly preferably 600 degrees Celsius, especially 630 degrees Celsius.
- the engine efficiency change is in this case in each case to those which are required anyway to overcome the driving resistance Engine operating mode related.
- a desulfurization need the mixture formation be greased, in particular to lambda ⁇ 1, in particular ⁇ 0.98, even if the driving state is so not yet required.
- the enrichment is advantageously carried out only when the necessary one Desulfurization temperature is at least approximately reached.
- the value is a characterizing a degree of sulfur poisoning of the NOx storage catalytic converter State variable determined.
- an adjustment of the internal combustion engine to an operating mode with a rich one Catalyst-air ratio is a characterizing a degree of sulfur poisoning of the NOx storage catalytic converter State variable determined.
- the proposed methods enable safe and effective Desulphurization of a NOx storage catalytic converter with only minimal influence the operation of the internal combustion engine, in particular, are not special Measures to increase the temperature of the NOx catalyst are necessary. This has the consequence that a corresponding deterioration in the efficiency of the Internal combustion engine can be avoided.
- the NOx storage activity of the catalyst or that in the catalyst during a Lean phase storable NOx amount selected is selected.
- the time and duration a release of a lean operating phase of the internal combustion engine depending of the amount of NOx that can be stored in the catalytic converter during a lean phase and the release period of the Lean operating phase selected.
- the approval period of the Lean operating phase is less than a predetermined threshold, one Sulfur poisoning of the NOx storage catalytic converter is suspected and a corresponding one Status signal formed.
- This can be a significant simplification and Cost reduction in desulfurization can be achieved because of the usual Methods and devices for controlling or regulating the lean operation of the Internal combustion engine can be used and no complex separate diagnostic measures for sulfur poisoning are required.
- the lean operating phase is preferred as a function of the temperature of the Catalyst released.
- the Lean operating phase is locked when the catalyst temperature is less than one predetermined minimum catalyst temperature and greater than a predetermined maximum catalyst temperature is.
- the status signal as in another embodiment of the invention It is provided information about the time, length and / or intensity of the passive Desulphurization involves doing desulphurization in a simple way done according to needs.
- a lambda value> 1 in addition to nitrogen oxides, sulfur components in the NOx storage catalytic converter stored.
- the information relates to catalysts with barium as the main storage component. With other basic chemistry the Catalysts can deviate the values.
- a lean-burn internal combustion engine preferably with a lambda value> 1 and possibly operated with a high proportion of shift operation. This leads to a faster one Sulfur storage than when operating with a stoichiometric or rich Lambda value.
- the NOx conversion efficiency is detected in the engine control 3 of the catalyst 7 and a control or regulation of the storage cycle of the NOx storage catalytic converter 7.
- the lean business can then reach a predetermined level in the NOx storage catalytic converter 7 stored NOx amount can be ended.
- the duration of a lean interval and a regeneration interval in particular depending on the catalyst temperature. In particular, depending on the catalyst temperature, the release of the Shift operation adapted to the NOx conversion efficiency of the catalyst become.
- a method for operating a lean-burn internal combustion engine enables one Desulfurization of a NOx storage catalytic converter without active ones Measures to increase the catalyst temperature.
- the value of a degree of sulfur poisoning of the NOx catalyst 7 characterizing state variable determined.
- the NOx storage activity of the NOx storage catalytic converter 7 is determined. This can be done, for example, with the help of the downstream of the NOx catalytic converter 7 arranged NOx sensor 10 or one downstream of the NOx storage catalytic converter arranged lambda probe 10 take place.
- the NOx storage activity is calculated from a model calculation or by means of a upstream sensor, for example 8,8 'or 9 determined.
- a lean operating or shift operating window narrowed or directly to form a state variable went to step 26.
- the state variable characterizes, as more precisely the degree of sulfur poisoning of the catalyst.
- the lean operation is restricted depending on the NOx storage activity limited the duration or intensity of lean operation.
- the NOx storage catalytic converter is activated stored NOx amount of lean operation ended.
- the time and duration of the release of a lean operating phase in particular depending on a stratified charge operation of the internal combustion engine 1 determined by the NOx storage activity.
- the state quantity in step 26 is then depending on the release period of the lean operating phase.
- the lean operating phase depending on the temperature of the Catalyst released. For example, the lean operating phase is blocked, if the catalyst temperature is less than a predetermined minimum Catalyst temperature and / or greater than a predetermined maximum Catalyst temperature is.
- the engine control unit 3 Control signals used to restrict lean operation in step 22 used. In this respect, there are no special measures for the formation of the Step 26 formed state variable required.
- step 26 preferably goes during a predetermined time interval in the catalyst 7 stored amount of sulfur on.
- step 23 the catalyst temperature and the catalyst-air ratio Lambda determined.
- the signals of the temperature sensor 13 and the downstream of the NOx storage catalyst Lambda probe 10 evaluated and in step 24 in the NOx storage catalyst 7 stored amount of sulfur calculated. This is also preferably a any sulfur discharge that may have occurred is taken into account.
- step 25 the calculated one stored amount of sulfur compared with a predetermined limit. Becomes If this limit value is exceeded, a transition is made to step 26.
- step 26 there is insufficient NOx activity or a release period the lean operating phase, which falls below a predetermined limit and at a Amount of sulfur that exceeds the specified limit a decision to form a status signal to initiate a passive desulfurization operating mode of the internal combustion engine.
- the status signal can, for example, be stored in the engine control unit 3. Furthermore, the status signal can be displayed to the driver and with a Request to initiate a desulfurization. On The stored status signal can be stored in a special diagnostic device Be picked up in the workshop for a natural desulfurization, for example in the As part of a vehicle inspection by the workshop staff in real traffic or on a specially designed roller device.
- switching recommendations can be given that cause a high-speed driving style with low engine base loads.
- the driver of the motor vehicle or the workshop staff be informed about a possible special operating condition, which leads to shortening the duration of the desulfurization is used and the one extreme Efficiency deterioration and corresponding driving deficiencies of the Accepts the vehicle.
- Step 3 is a schematic representation of the course of another shown inventive method.
- step 30 the NOx storage activity of the storage catalyst determined.
- step 31 there is a Check whether the NOx storage activity is insufficient or not. at insufficient NOx storage activity goes to step 33, if necessary beforehand Step 31a gone.
- Step 31a corresponds to step 22 from Figure 2, i.e. it will The time, intensity and duration of a lean operating phase are determined.
- step 33 checked whether the NOx storage catalyst temperature is one Desulphurization. It is preferably checked whether this temperature in a predetermined temperature range, i.e. larger than a predetermined one minimum catalyst temperature and / or greater than a predetermined maximum Catalyst temperature is.
- step 35 If the catalytic converter has a permissible temperature, proceeded to step 35.
- step 35 there is insufficient NOx storage activity and an allowable catalyst temperature to perform a active desulfurization by setting the internal combustion engine to one Operating mode initiated with a lambda value ⁇ 1.0.
- step 34 the catalyst temperature is permissible and one is not Inadequate NOx storage activity is a decision on its own natural desulfurization which sets the driving profile in step 36 exploit.
- step 37 the Sulfur discharge of the NOx storage catalyst determined.
- step 33 the lambda value of the exhaust gas and the temperature of the catalytic converter used.
- step 33 the one suitable for desulfurization Catalyst temperature used and on the other hand in step 38 used to check whether the desulfurization of the catalyst a predetermined Criterion is sufficient. If this is not the case, there will be insufficient NOx activity Step 31 from step 38 went back to step 35. With sufficient Desulfurization then takes place in step 39 to end the setting of Lambda values to ⁇ 1.
- the active desulfurization carried out in step 35 can be automated Gearboxes are supplemented by shifting the switching identifiers compared to normal operation with a driving style with high speeds cause low engine base loads. Accordingly, with a vehicle with a continuously variable transmission an operation with deviating from normal operation Translation maps take place in order to use a high-speed driving style low loads.
- the invention described above enables low fuel A sufficiently safe and easy desulfurization of a sulfur content NOx storage catalytic converter, without using one too often uncomfortable operation of the vehicle results, which is not for the customer would be acceptable. Because of a lower development and Application effort, development costs can also be saved to achieve a purchase price reduction before the customer.
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- 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
- Bildung eines Statussignals in Abhängigkeit von dem Wert der Zustandsgröße
- Speicherung und / oder Anzeige des Statussignals zur Einleitung einer eine passive Entschwefelung des Katalysators bewirkenden Betriebsweise der Brennkraftmaschine.
Description
- Figur 1
- eine Brennkraftmaschine mit einer zugeordneten Abgasanlage
- Figur 2
- ein Blockschaltbild für ein Entschwefelungsverfahren ohne aktive Entschwefelung
- Figur 3
- ein Blockschaltbild für ein Entschwefelungsverfahren mit einer auf Anfettung reduzierten aktiven Entschwefelung.
Claims (17)
- Verfahren zum Betrieb eines Kraftfahrzeugs mit einer magerlauffähigen Brennkraftmaschine mit zumindest einem in einer Abgasanlage der Brennkraftmaschine angeordneten NOX-Speicherkatalysator, wobei eine Ermittlung des Wertes einer einen Schwefelvergiftungsgrad des Katalysators charakterisierenden Zustandsgröße erfolgt, gekennzeichnet durch folgende Schritte:Bildung eines Statussignals in Abhängigkeit von dem Wert der ZustandsgrößeSpeicherung und / oder Anzeige des Statussignals zur Einleitung einer eine passive Entschwefelung des Katalysators bewirkenden Betriebsweise der Brennkraftmaschine.die Brennkraftmaschine in Abhängigkeit vom Wert der Zustandsgröße auf eine Betriebsweise mit einem Lambdawert < 1 eingestellt wird, wobei der Wirkungsgrad der Brennkraftmaschine bei einem beliebigen Betriebspunkt zwischen 50 kmlh und 100 km/h gegenüber dem gleichen Betriebspunkt ohne gebildeten Statussignal um höchstens 3 %, vorzugsweise 2 %, besonders bevorzugt 1 % oder 0 % verschlechtert wird, insbesondere bei einem Betriebspunkt, der einer Konstantfahrt in der Ebene bei 20 Grad Celsius Außentemperatur entspricht.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Zustandsgröße in Abhängigkeit von einer NOx-Speicheraktivität des Katalysators gewählt wird.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass die NOx-Speicheraktivität mittels einer stromabwärts des Katalysators angeordneten Lambdasonde und / oder eines NOx-Sensors ermittelt wird.
- Verfahren nach zumindest einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Zustandsgröße in Abhängigkeit von der in den Katalysator während einer Magerbetriebsphase nach einer Regenerationsphase eingespeicherten NOx-Menge gewählt wird.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass die Zustandsgröße in Abhängigkeit von der während eines vorgegebenen Zeitintervalls während einer Magerbetriebsphase nach einer Regenerationsphase in den Katalysator eingespeicherten Schwefelmenge gewählt wird.
- Verfahren nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass bei der Ermittlung der Zustandsgröße eine Schwefelentladung des Katalysators berücksichtigt wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zustandsgröße in Abhängigkeit von einer Katalysatortemperatur gewählt wird.
- Verfahren nach zumindest einem der vorhergehenden Ansprüche , dadurch gekennzeichnet, dass die Dauer einer Freigabe einer Magerbetriebsphase, insbesondere eines Schichtladebetriebs der Brennkraftmaschine, in Abhängigkeit von der NOx-Speicheraktivität insbesondere der in den Katalysator eingespeicherten NOx-Menge festgelegt wird, und dass die Zustandsgröße in Abhängigkeit von der Freigabedauer der Magerbetriebsphase gewählt wird.
- Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass die Magerbetriebsphase, insbesondere zusätzlich in Abhängigkeit von der Temperatur des Katalysators freigegeben wird.
- Verfahren nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass die Magerbetriebsphase gesperrt wird, wenn die Katalysatortemperatur kleiner als eine vorbestimmte minimale Katalysatortemperatur oder größer als eine vorgegebenen maximale Katalysatortemperatur ist.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass für die Ermittlung der Zustandsgröße vorgegebene Betriebszustände der Brennkraftmaschine, insbesondere Leerlaufphasen oder Stop-and-Go-Phasen ausgeschlossen werden.
- Verfahren nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Statussignal Angaben über Zeitpunkt, Länge und /oder Intensität der eine passive Entschwefelung des Katalysators bewirkenden Betriebsweise der Brennkraftmaschine beinhaltet.
- Verfahren nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zustandsgröße in Abhängigkeit von einem ermittelten Schwefeleintrag gebildet wird.
- Verfahren nach Anspruch 13, dadurch gekennzeichnet, dass der Schwefeleintrag mittels zumindest eines stromabwärts oder stromaufwärts des Katalysators angeordneten Schwefelsensors, vorzugsweise eines Infrarotsensors ermittelt wird.
- Verfahren nach Anspruch 13 oder 14, dadurch gekennzeichnet, dass der Schwefeleintrag geschätzt wird.
- Verfahren nach Anspruch 15, dadurch gekennzeichnet, dass die Schätzung auf einem Kraftstoffverbrauch der Brennkraftmaschine beruht.
- Verfahren nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass nach einer passiven Entschwefelung eine Zurücksetzung des Wertes der Zustandsgröße auf einem dem aktuellen Schwefelvergiftungsgrad des Katalysators entsprechenden Wert erfolgt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002123595 DE10223595A1 (de) | 2002-05-27 | 2002-05-27 | Verfahren zum Betreiben eines Kraftfahrzeugs mit NOx-Speicherkatalysator |
DE10223595 | 2002-05-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1367245A2 true EP1367245A2 (de) | 2003-12-03 |
EP1367245A3 EP1367245A3 (de) | 2006-06-14 |
Family
ID=29414218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03005886A Withdrawn EP1367245A3 (de) | 2002-05-27 | 2003-03-17 | Verfahren zum Betreiben eines Kraftfahrzeuges mit NOx-Speicherkatalysator |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1367245A3 (de) |
DE (1) | DE10223595A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015016525A1 (de) | 2015-12-19 | 2016-08-11 | Daimler Ag | Verfahren zum Bestimmen einer Verschwefelung einer Abgasnachbehandlungseinrichtung einer Verbrennungskraftmaschine |
EP2868885A4 (de) * | 2012-06-19 | 2017-01-18 | Toyota Jidosha Kabushiki Kaisha | Abgasreinigungsvorrichtung für einen verbrennungsmotor |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008045594B4 (de) | 2008-09-03 | 2012-05-16 | Audi Ag | Verfahren und Vorrichtung zur Zudosierung eines Reduktionsmittels in einen Abgasstrang einer Brennkraftmaschine eines Fahrzeuges |
DE102016222012B4 (de) | 2015-12-18 | 2022-09-29 | Ford Global Technologies, Llc | Verfahren zum Steuern eines NOx-Speicher-Katalysators |
Citations (2)
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EP0860595A1 (de) | 1997-02-20 | 1998-08-26 | Ford Global Technologies, Inc. | Verfahren zur Entschwefelung einer Stickoxidfalle im Abgassystem eines Verbrennungsmotors |
DE19747222C1 (de) | 1997-10-25 | 1999-03-04 | Daimler Benz Ag | Verbrennungsmotoranlage mit Stickoxid-Speicherkatalysator und Betriebsverfahren hierfür |
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DE19705335C1 (de) * | 1997-02-12 | 1998-09-17 | Siemens Ag | Verfahren zur Regeneration eines Speicherkatalysators |
US5832722A (en) * | 1997-03-31 | 1998-11-10 | Ford Global Technologies, Inc. | Method and apparatus for maintaining catalyst efficiency of a NOx trap |
JP3805098B2 (ja) * | 1998-03-26 | 2006-08-02 | 株式会社日立製作所 | エンジンの排気ガス浄化制御装置 |
DE19816276C2 (de) * | 1998-04-11 | 2000-05-18 | Audi Ag | Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine |
DE19850757A1 (de) * | 1998-08-07 | 2000-02-17 | Volkswagen Ag | Verfahren und Vorrichtung zur De-Sulfatierung einer Katalysatoreinrichtung |
DE19842625C2 (de) * | 1998-09-17 | 2003-03-27 | Daimler Chrysler Ag | Verfahren zum Betrieb einer Verbrennungsmotoranlage mit schwefelanreichernder Abgasreinigungskomponente und damit betreibbare Verbrennungsmotoranlage |
DE19843859A1 (de) * | 1998-09-25 | 2000-03-30 | Bosch Gmbh Robert | Katalysatorregenerationsverfahren |
DE19910664A1 (de) * | 1999-03-11 | 2000-09-14 | Volkswagen Ag | Verfahren zur De-Sulfatierung eines NOx-Speicherkatalysators |
DE19921973A1 (de) * | 1999-05-12 | 2000-11-16 | Volkswagen Ag | Verfahren zur Entschwefelung von wenigstens einem in einem Abgaskanal einer Verbrennungskraftmaschine angeordneten NO¶x¶-Speicherkatalysator |
DE19926146A1 (de) * | 1999-06-09 | 2000-12-14 | Volkswagen Ag | Verfahren zur Initiierung und Überwachung einer Entschwefelung von wenigstens einem in einem Abgaskanal einer Verbrennungskraftmaschine angeordneten NOx-Speicherkatalysator |
US6250283B1 (en) * | 1999-10-18 | 2001-06-26 | Ford Global Technologies, Inc. | Vehicle control method |
DE19935341A1 (de) * | 1999-07-28 | 2001-02-01 | Volkswagen Ag | Verfahren zur Regelung einer Abgastemperatur einer Magerbrennkraftmaschine während einer Entschwefelung eines Katalysators |
DE10001992A1 (de) * | 2000-01-19 | 2001-07-26 | Volkswagen Ag | Verfahren zur temporären Erhöhung einer Abgastemperatur einer Verbrennungskraftmaschine |
DE10017203A1 (de) * | 2000-04-06 | 2001-10-11 | Audi Ag | Verfahren zur Entschwefelung eines im Abgasstrang einer Diesel-Brennkraftmaschine angeordneten Oxidationskatalysators |
DE10047809B4 (de) * | 2000-09-27 | 2014-01-09 | Volkswagen Ag | Vefahren zur Betriebssteuerung einer Sekundärluftpumpe und Abgasreinigungsanlage mit einer Sekundärluftpumpe |
-
2002
- 2002-05-27 DE DE2002123595 patent/DE10223595A1/de not_active Ceased
-
2003
- 2003-03-17 EP EP03005886A patent/EP1367245A3/de not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0860595A1 (de) | 1997-02-20 | 1998-08-26 | Ford Global Technologies, Inc. | Verfahren zur Entschwefelung einer Stickoxidfalle im Abgassystem eines Verbrennungsmotors |
DE19747222C1 (de) | 1997-10-25 | 1999-03-04 | Daimler Benz Ag | Verbrennungsmotoranlage mit Stickoxid-Speicherkatalysator und Betriebsverfahren hierfür |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2868885A4 (de) * | 2012-06-19 | 2017-01-18 | Toyota Jidosha Kabushiki Kaisha | Abgasreinigungsvorrichtung für einen verbrennungsmotor |
DE102015016525A1 (de) | 2015-12-19 | 2016-08-11 | Daimler Ag | Verfahren zum Bestimmen einer Verschwefelung einer Abgasnachbehandlungseinrichtung einer Verbrennungskraftmaschine |
Also Published As
Publication number | Publication date |
---|---|
EP1367245A3 (de) | 2006-06-14 |
DE10223595A1 (de) | 2003-12-11 |
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