DE102006043103A1 - Lambda sensor calibration method for internal combustion engine of motor vehicle, involves determining corrected lambda signal from output signal of lambda sensor, calculated air ratio of gas flow and temperature of gas flow - Google Patents
Lambda sensor calibration method for internal combustion engine of motor vehicle, involves determining corrected lambda signal from output signal of lambda sensor, calculated air ratio of gas flow and temperature of gas flow Download PDFInfo
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- DE102006043103A1 DE102006043103A1 DE102006043103A DE102006043103A DE102006043103A1 DE 102006043103 A1 DE102006043103 A1 DE 102006043103A1 DE 102006043103 A DE102006043103 A DE 102006043103A DE 102006043103 A DE102006043103 A DE 102006043103A DE 102006043103 A1 DE102006043103 A1 DE 102006043103A1
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- lambda
- gas flow
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- air ratio
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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
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/25—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an ammonia generator
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/28—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a plasma reactor
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/30—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel reformer
-
- 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
- F01N2550/05—Systems for adding substances into exhaust
-
- 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
- F01N2570/14—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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
Abstract
Description
Stand der TechnikState of technology
Die Erfindung betrifft ein Verfahren zur Kalibrierung einer Lambdasonde in einem Gasstrom eines Reduktionsmittel-Generierungssystems mit einem Plasmabrenner und einer Oxidations-Reformierungseinheit zur Erzeugung von Reduktionsmittel für die Nachbehandlung von Abgas einer Brennkraftmaschine.The The invention relates to a method for calibrating a lambda probe in a gas stream of a reducing agent generation system with a plasma burner and an oxidation-reforming unit for generating Reducing agent for the aftertreatment of exhaust gas of an internal combustion engine.
Im Zusammenhang mit künftigen gesetzlichen Vorgaben bezüglich der Stickoxidemission von Kraftfahrzeugen ist eine Abgasnachbehandlung erforderlich. Die selektive katalytische Reduktion (SCR) kann zur Verringerung der Stickoxid-Emission (Entstickung) von Verbrennungsmotoren, insbesondere von Dieselmotoren, mit zeitlich überwiegend magerem, d.h. sauerstoffreichem Abgas eingesetzt werden. Hierbei wird dem Abgas eine definierte Menge eines selektiv wirkenden Reduktionsmittels zugegeben. Dies kann beispielsweise in Form von Ammoniak sein, welches direkt gasförmig zudosiert wird, oder auch aus einer Vorläufersubstanz in Form von Harnstoff oder aus einer Harnstoff-Wasser-Lösung (HWL) gewonnen wird.in the Related to future ones legal requirements regarding The nitrogen oxide emission of motor vehicles is an exhaust aftertreatment required. Selective Catalytic Reduction (SCR) can be used for Reduction of nitrogen oxide emission (denitrification) of internal combustion engines, in particular of diesel engines, with temporally predominantly lean, i. oxygenated Exhaust gas can be used. Here, the exhaust gas is a defined Amount of a selective reducing agent added. This may for example be in the form of ammonia, which is added directly in gaseous form or from a precursor substance in the form of urea or from a urea-water solution (HWL) is obtained.
In
der
Gemäß einer noch unveröffentlicheten Schrift der Anmelderin kann der zur Ammoniakerzeugung benötigte Wasserstoff aus einem fetten Kraftstoff-Luft-Gemisch durch partielle Oxidation in einer Oxidations-Reformierungseinheit erzeugt werden. Hierbei weist das Kraftstoff-Luft-Gemisch einen Lambdawert von 0,35 bis 0,40 auf, der während des Betriebes überwacht werden muss. Lambdasonden mit Sprungcharakteristik werden üblicherweise in einem Lambda-Bereich von 0,98 bis 1,02 eingesetzt. Auch Breitband-Lambdasonden sind nur in einem Bereich mit einem Lambda höher als 0,7 einsetzbar. In dem Lambda-Bereich unter Lambda = 0,5 weisen beide Sondentypen eine sehr geringe Abhängigkeit der Ausgangsspannung bei einer Lambdaänderung auf, wodurch ein Rauschen des elektrischen Signals auch bei Mittelung des Signals über einen längeren Zeitraum eine ausreichend genaue Bestimmung des Lambdas verhindert. Bei einer Sprungsonde ist typischerweise das Rauschen in dem Bereich um Lambda = 0,4 so hoch, dass dies einem Lambda-Bereich von 0,025 entspricht. Der Lambdawert müsste aber mit einer Genauigkeit von 0,005 bestimmt werden.According to one still unpublished writing Applicant may use the hydrogen required for ammonia production from a rich fuel-air mixture by partial oxidation be generated in an oxidation-reforming unit. in this connection the fuel-air mixture has a lambda value of 0.35 to 0.40 on while monitored by the company must become. Lambda probes with a jump characteristic usually become used in a lambda range of 0.98 to 1.02. Also broadband lambda probes are only usable in a range with a lambda higher than 0.7. In In the lambda range below lambda = 0.5, both types of probes have one very low dependence of Output voltage at a lambda change, causing a noise of the electrical signal even when averaging the signal over one longer period a sufficiently accurate determination of the lambda prevented. At a The jump probe is typically the noise in the range around lambda = 0.4 so high that this corresponds to a lambda range of 0.025. The lambda value would have to but be determined with an accuracy of 0.005.
Es ist Aufgabe der Erfindung, ein Verfahren und eine Vorrichtung zu schaffen, die eine ausreichend genaue Messung von Werten im Lambda-Bereich von 0,35 bis 0,4 ermöglichen.It It is an object of the invention to provide a method and a device create a sufficiently accurate measurement of values in the lambda range from 0.35 to 0.4.
Offenbarung der ErfindungDisclosure of the invention
Vorteile der ErfindungAdvantages of the invention
Die das Verfahren betreffende Aufgabe wird dadurch gelöst, dass die Lambdasonde den Lambdawert des Gasstroms nach der Oxidations-Reformierungseinheit misst, dass die Temperatur des Gasstroms mit einem Temperatursensor gemessen wird und dass ein korrigiertes Lambdasignal aus einem Ausgangssignal der Lambdasonde, einer berechneten Luftzahl des Gasstroms und einer Temperatur des Gasstroms bestimmt wird. Aus einer Bestimmung der dem Reduktionsmittel-Generierungssystems zugeführten Luftmenge, die beispielsweise mit einem Heißfilm-Luftmassenmesser bestimmt werden kann, und aus einer zudosierten Kraftstoffmenge wird die berechnete Luftzahl bestimmt. Aus der berechneten Luftzahl und der Temperatur des Gasstroms werden ein Minimalwert und ein Maximalwert bestimmt, mit denen das Ausgangssignal der Lambdasonde nach einer Mittelwertbildung begrenzt wird. Dieser so korrigierte Lambdawert kann in einer Steuerung des Reduktionsmittel-Generierungssystems zur Überwachung der Betriebsparameter zur Erreichung einer guten Ausbeute an Reduktionsmittel verwendet werden. Weist das dem Reduktionsmittel-Generierungssystem zugeführte Gasgemisch einen Lambdawert kleiner als 0,32 auf, ist mit Bildung von Ruß zu rechnen. Steigt der Lambdawert über 0,45, sinkt die Produktion von Wasserstoff und Kohlenmonoxid, so dass die Ammoniak-Produktion in einer nachgeschalteten Stickoxid-Speicher/Ammoniak-Erzeugungseinheit sinkt.The The object relating to the method is achieved in that the lambda probe the lambda value of the gas stream after the oxidation-reforming unit Measures that the temperature of the gas flow with a temperature sensor is measured and that a corrected lambda signal from an output signal the lambda probe, a calculated air ratio of the gas flow and a Temperature of the gas stream is determined. From a provision of the amount of air supplied to the reducing agent generation system, for example with a hot-film air mass meter can be determined, and from a metered amount of fuel the calculated air ratio is determined. From the calculated air ratio and the temperature of the gas flow become a minimum value and a Maximum value determined by which the output signal of the lambda probe after averaging is limited. This corrected lambda value may be in a control of the reductant generation system for monitoring the operating parameters to achieve a good yield of reducing agent be used. Indicates that to the reductant generation system supplied Gas mixture has a lambda value less than 0.32, is with formation from soot too expected. If the lambda value increases 0.45, the production of hydrogen and carbon monoxide decreases, so that the ammonia production in a downstream nitrogen oxide storage / ammonia production unit sinks.
Wird aus der zugeführten Luftmenge und der zudosierten Kraftstoffmenge die berechnete Luftzahl für den Gasstrom in dem Reduktionsmittel-Generierungssystem gebildet und wird das Ausgangssignal der Lambdasonde mit einem Kennfeld mit den Parametern berechnete Luftzahl und Temperatur des Gasstroms korrigiert, kann mit geringem Rechenaufwand für den relevanten Bereich an Betriebsparametern ein stabiler korrigierter Lambdawert bereitgestellt werden.If the calculated air quantity for the gas flow in the reducing agent generation system is formed from the supplied air quantity and the metered quantity of fuel, the output signal becomes the lambda probe with a map with the parameters calculated air ratio and temperature of the gas flow corrected, can be provided with little computational effort for the relevant range of operating parameters, a stable corrected lambda value.
Eine Phase mit unstabilem Temperatursignal kann umgangen werden, indem nach einem Start des Reduktionsmittel-Generierungssystems das Kalibrierverfahren erst nach 2 Minuten begonnen wird. Diese Betriebsphase nach dem Start des Reduktionsmittel-Generierungssystems dient insbesondere der Aufheizung der Oxidations-Reformierungseinheit und nicht der Erzeugung von Reduktionsmittel, so dass eine Bestimmung des Lambdawerts des Gasgemischs nicht erforderlich ist.A Phase with unstable temperature signal can be bypassed by after a start of the reductant generation system, the calibration procedure will be started after 2 minutes. This phase of operation after the Start of the reducing agent generation system is used in particular the Heating the oxidation-reforming unit and not the generation of reducing agent, so that a determination of the lambda value of the Gas mixture is not required.
Wird während einer Zeitdauer mit einer Schwankung der Temperatur des Gasstroms von weniger als 50K bevorzugt von weniger als 20K aus dem Ausgangssignal der Lambdasonde durch Mittelung ein gemitteltes Lambdasignal bestimmt, kann eine Mittelwertbildung über eine möglichst lange Zeitdauer mit konstanten Betriebsbedingungen erfolgen, wodurch sich ein Rauschen des Lambdasignals besonders gut herausmittelt. Eine Phase mit konstanter Temperatur des Gasstroms in oder nach der Oxidations-Reformierungseinheit geht mit einer Phase konstanten Lambdawerts einher, so dass in einer solchen Phase konstanter Temperatur die Mittelwertbildung für einen konstanten Lambdawert erfolgen kann. Wegen der vergleichsweise geringen Präzision, mit der die Temperatur des Gasstroms bestimmt werden muss, kann ein preisgünstiger Temperatursensor eingesetzt werden, soweit er für die Betriebstemperatur bis etwa 1100 °C geeignet ist.Becomes while a period of time with a fluctuation in the temperature of the gas flow less than 50K preferably less than 20K from the output signal the lambda probe determines averaged lambda signal by averaging can be averaging over one possible long period of time with constant operating conditions, whereby A noise of the lambda signal is particularly good. A phase with constant temperature of gas flow in or after the oxidation-reforming unit goes with a phase constant Lambda values are accompanied, so that in such a phase constant temperature the averaging for a constant lambda value can take place. Because of the comparatively low precision, with which the temperature of the gas flow must be determined, can a cheaper Temperature sensor can be used, as far as it is up to the operating temperature about 1100 ° C suitable is.
Werden von dem Kennfeld der Minimalwert und der Maximalwert bereitgestellt und wird das gemittelte Lambdasignal auf Werte größer als der Minimalwert und kleiner als der Maximalwert begrenzt, kann ein zuverlässiger Lambdawert auch mit einer Lambda-Sprungsonde bestimmt werden.Become provided by the map of the minimum value and the maximum value and the averaged lambda signal is greater than the minimum value and less than the maximum value can be limited reliable Lambda value can also be determined with a lambda jump probe.
Eine Ausführungsform des Verfahrens mit einer verbesserten Betriebsstabilität der Kalibrierung sieht vor, dass das korrigierte Lambdasignal als Lambdawert in eine Steuerung übernommen wird, wenn die relative Abweichung zwischen dem korrigierten Lambdasignal und der berechneten Luftzahl weniger als 5% beträgt. Etwaige das Ausgangssignal der Lambdasonde beeinflussende Störsignale bleiben dann bedeutungslos.A embodiment sees the process with improved operational stability of the calibration that the corrected lambda signal is taken as lambda value in a controller when the relative deviation between the corrected lambda signal and the calculated air ratio is less than 5%. Eventually the output of the Lambda sensor interfering interference signals then stay meaningless.
Die die Vorrichtung betreffende Aufgabe wird dadurch gelöst, dass zur Kalibrierung der Lambdasonde ein Temperatursensor in oder nach der Oxidations-Reformierungseinheit vorgesehen ist. In der Oxidations-Reformierungseinheit und unmittelbar danach ist die Temperatur des Gasstroms weitgehend konstant, solange der Oxidations-Reformierungseinheit ein Gasstrom mit konstanter Luftzahl zugeführt wird. Ist der Temperatursensor innerhalb der Oxidations-Reformierungseinheit angeordnet, kann er weiterhin zur Bestimmung der Alterung der Oxidations-Reformierungseinheit genutzt werden.The the object relating to the device is achieved in that To calibrate the lambda probe, a temperature sensor in or after the oxidation-reforming unit is provided. In the oxidation-reforming unit and immediately thereafter, the temperature of the gas stream is substantially constant, as long as the oxidation-reforming unit a gas flow with a constant Air ratio is supplied. Is the temperature sensor within the oxidation-reforming unit arranged, it can continue to determine the aging of the oxidation-reforming unit be used.
Ist die Lambdasonde als Sprungsonde ausgebildet, kann sie besonders kostengünstig ausgeführt sein. Der Einsatz einer Breitbandsonde ist prinzipiell möglich, bringt jedoch für die Messung von Lambdawerten im Bereich 0,35 bis 0,4 keinen besonderen Vorteil.is The lambda probe is designed as a jump probe, it can be special economical accomplished be. The use of a broadband probe is possible in principle brings however for the measurement of lambda values in the range of 0.35 to 0.4 is nothing special Advantage.
Kurze Beschreibung der Zeichnungenshort Description of the drawings
Die Erfindung wird im Folgenden anhand des in den Figuren dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:The Invention will be described below with reference to the figures shown in the figures Embodiment explained in more detail. It demonstrate:
Ausführungsformen der Erfindungembodiments the invention
Die
Erzeugung von Ammoniak erfolgt innerhalb des Reduktionsmittel-Generierungssystems
Da
der SCR-Katalysator
In
der
Das
erfindungsgemäße Verfahren
läuft ab, wenn
von dem Entscheid Magerphase
In
der Fettphase
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006043103A DE102006043103A1 (en) | 2005-11-14 | 2006-09-14 | Lambda sensor calibration method for internal combustion engine of motor vehicle, involves determining corrected lambda signal from output signal of lambda sensor, calculated air ratio of gas flow and temperature of gas flow |
Applications Claiming Priority (19)
Application Number | Priority Date | Filing Date | Title |
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DE102005054129 | 2005-11-14 | ||
DE102005054129.1 | 2005-11-14 | ||
DE102005062556.8 | 2005-12-27 | ||
DE102005062556 | 2005-12-27 | ||
DE102006018955.8 | 2006-04-24 | ||
DE102006018955 | 2006-04-24 | ||
DE102006020693 | 2006-05-04 | ||
DE102006020693.2 | 2006-05-04 | ||
DE102006021490 | 2006-05-09 | ||
DE102006021490.0 | 2006-05-09 | ||
DE102006021987 | 2006-05-11 | ||
DE102006021987.2 | 2006-05-11 | ||
DE102006022385.3 | 2006-05-12 | ||
DE102006022385 | 2006-05-12 | ||
DE102006022992.4 | 2006-05-17 | ||
DE102006022992 | 2006-05-17 | ||
DE102006023338 | 2006-05-18 | ||
DE102006023338.7 | 2006-05-18 | ||
DE102006043103A DE102006043103A1 (en) | 2005-11-14 | 2006-09-14 | Lambda sensor calibration method for internal combustion engine of motor vehicle, involves determining corrected lambda signal from output signal of lambda sensor, calculated air ratio of gas flow and temperature of gas flow |
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DE102006043103A1 true DE102006043103A1 (en) | 2007-07-05 |
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DE102006043103A Withdrawn DE102006043103A1 (en) | 2005-11-14 | 2006-09-14 | Lambda sensor calibration method for internal combustion engine of motor vehicle, involves determining corrected lambda signal from output signal of lambda sensor, calculated air ratio of gas flow and temperature of gas flow |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102013216024A1 (en) * | 2013-08-13 | 2015-02-19 | Volkswagen Aktiengesellschaft | Method for lambda control of an internal combustion engine and control device |
-
2006
- 2006-09-14 DE DE102006043103A patent/DE102006043103A1/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013216024A1 (en) * | 2013-08-13 | 2015-02-19 | Volkswagen Aktiengesellschaft | Method for lambda control of an internal combustion engine and control device |
DE102013216024B4 (en) | 2013-08-13 | 2022-01-27 | Volkswagen Aktiengesellschaft | Method for lambda control of an internal combustion engine and control device |
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