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DE4320881A1 - Combination of lambda probes - Google Patents

Combination of lambda probes

Info

Publication number
DE4320881A1
DE4320881A1 DE4320881A DE4320881A DE4320881A1 DE 4320881 A1 DE4320881 A1 DE 4320881A1 DE 4320881 A DE4320881 A DE 4320881A DE 4320881 A DE4320881 A DE 4320881A DE 4320881 A1 DE4320881 A1 DE 4320881A1
Authority
DE
Germany
Prior art keywords
lambda
lambda probe
probe
combination
probes
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.)
Withdrawn
Application number
DE4320881A
Other languages
German (de)
Inventor
Ulrich Dr Schoenauer
Joerg Huber
Edelbert Dr Haefele
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heraeus Electro Nite International NV
Original Assignee
Roth Forschung & Co Autom 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 Roth Forschung & Co Autom GmbH filed Critical Roth Forschung & Co Autom GmbH
Priority to DE4320881A priority Critical patent/DE4320881A1/en
Priority to ES94906928T priority patent/ES2107812T3/en
Priority to EP94906928A priority patent/EP0686232B1/en
Priority to US08/507,462 priority patent/US5658445A/en
Priority to AT94906928T priority patent/ATE158059T1/en
Priority to PCT/EP1994/000370 priority patent/WO1994019593A1/en
Priority to DE59404036T priority patent/DE59404036D1/en
Priority to KR1019950703612A priority patent/KR960701290A/en
Priority to JP6518609A priority patent/JPH08507143A/en
Publication of DE4320881A1 publication Critical patent/DE4320881A1/en
Withdrawn legal-status Critical Current

Links

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
    • F02D41/14—Introducing closed-loop corrections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
    • F02D41/1441—Plural sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/406—Cells and probes with solid electrolytes
    • G01N27/4065—Circuit arrangements specially adapted therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/406—Cells and probes with solid electrolytes
    • G01N27/4067—Means for heating or controlling the temperature of the solid electrolyte
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/417—Systems using cells, i.e. more than one cell and probes with solid electrolytes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/417—Systems using cells, i.e. more than one cell and probes with solid electrolytes
    • G01N27/4175—Calibrating or checking the analyser

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Electrochemistry (AREA)
  • Pathology (AREA)
  • Molecular Biology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Measuring Oxygen Concentration In Cells (AREA)

Description

Die Erfindung betrifft eine Kombination einer beheizten Lambda-Sonde mit sprungförmiger bzw. binärer Sensor-Charakteristik und einer weiteren beheizten Lambda-Sonde für die Bestimmung des Lambda-Wertes in einem Gasgemisch, beispielsweise im Abgas, vorzugsweise von Verbrennungsmotoren.The invention relates to a combination of a heated Lambda probe with step or binary Sensor characteristic and another heated Lambda probe for determining the lambda value in one Gas mixture, for example in the exhaust gas, preferably from Internal combustion engines.

Lambda-Sonden sind an sich bekannt (DE-A-41 09 560) und arbeiten als binäre Lambda-Sonden, die nur bestimmen, ob der Wert über oder unterhalb des Wertes von Lambda gleich eins liegt.Lambda probes are known per se (DE-A-41 09 560) and work as binary lambda probes that only determine whether the Value above or below the value of lambda equal to one lies.

Nachdem bekannte Lambda-Sonden einer Drift unterliegen, sich also im Betrieb oder aufgrund der Alterung die gemessenen Lambda-Werte ändern, sind schon Zwei-Sonden-Systeme bekannt geworden (DE-OS 24 44 334, DE-OS 23 04 622, US-PS 47 39 614).After known lambda probes are subject to drift, themselves in operation or due to aging, the measured Two-probe systems are already known to change lambda values become (DE-OS 24 44 334, DE-OS 23 04 622, US-PS 47 39 614).

Darüber hinaus ist auch eine gattungsgemäße Kombination zweier Sonden bekannt (DE-A-41 35 254), bei der eine Sonde vor dem eigentlichen Katalysator und eine Strömungsrichtung dahinter angeordnet ist, wobei eine der beiden Sonden dazu dient, Veränderungen im Meßverhalten der anderen festzustellen und zu kompensieren.In addition, there is also a generic combination of two Probes known (DE-A-41 35 254), in which a probe before actual catalyst and a flow direction behind it is arranged, one of the two probes being used Determine changes in the measuring behavior of others and to compensate.

Bei der bekannten gattungsgemäßen Kombination der beiden Lambda-Sonden treten jedoch aufgrund der großen räumlichen Abstände der beiden Lambda-Sonden Ungenauigkeiten auf.In the known generic combination of the two However, lambda probes occur due to the large spatial  Distances between the two lambda probes inaccuracies.

Der Erfindung liegt die Aufgabe zugrunde, eine Kombination gemäß dem Oberbegriff des Hauptanspruchs so auszugestalten, daß trotz vorhandener Drift die Genauigkeit der gemessenen Werte der bekannten Sonde nicht beeinträchtigt wird.The invention has for its object a combination to design according to the preamble of the main claim, that despite the drift, the accuracy of the measured Values of the known probe is not affected.

Diese Aufgabe wird bei einer gattungsgemäßen Lambda-Sonde gemäß dem Oberbegriff des Hauptanspruchs erfindungsgemäß durch dessen kennzeichnende Merkmale gelöst.This task is carried out with a generic lambda probe according to the preamble of the main claim according to the invention its characteristic features solved.

Nach Lehre der Erfindung wird also der binären Lambda-Sonde, welche bei dem Lambda-Wert von 1 einen Widerstandssprung macht, eine zweite, breitbandige Lambda-Sonde in unmittelbare räumliche Nähe einander zugeordnet. Durch diese Kombination kann die breitbandige Lambda-Sonde mit Hilfe der binären bei einem Wert Lambda = 1 so kalibriert werden, daß die breitbandige Lambda-Sonde bezüglich der Drift kalibriert wird. Sie weist hierbei einen kontinuierlich sich ändernden Widerstand, vorzugsweise linear im Bereich von Lambda 0,8-1,2 auf. Infolge der hohen Genauigkeit der Bestimmung des Wertes von Lambda im Bereich um Lambda = 1, kann eine verbesserte Regelung eines Motors, insbesondere auch bei dynamischen Betriebszuständen erreicht werden. Die geforderte hohe Genauigkeit in einem kleinen Meßbereich kann mit Hilfe des erfindungsgemäß zusätzlich verwendeten Lambda-Sensors erzielt werden. Dabei sind auf einem Sensorelement sauerstoffsensitive Materialien einmal mit sprungförmiger und einmal breitbandiger Sensorcharakteristik aufgebracht, vorzugsweise in unmittelbarer räumlicher Nähe zueinander, oder auch auf einem gemeinsamen Substrat, welches dieselbe Temperatur aufweist. Über das sprungförmige Signal kann in jedem Betriebszustand die vorzugsweise temperaturgeregelte Breitbandsonde exakt kalibriert werden. Darüber hinaus können auch sehr schnelle Temperaturschwankungen im Abgas erfaßt werden, welche üblicherweise eine Verfälschung des Sensorsignals bedingen, wenn sich beide Sensor-Elemente auf einem gemeinsamen Substrat mit gleicher Temperatur befinden, welches in an sich bekannter Weise beheizt ist. Außerdem wird infolge der unmittelbaren räumlichen Nähe zueinander auch in etwa das ansonsten über den Strömungsbereich unterschiedlich konzentrierte Gasgemisch praktisch identische Gas gemessen. Ebenso ist es möglich, die Variation der Arbeitstemperatur auf dem gemeinsamen Substrat zur Kompensation der Drift herzunehmen.According to the teaching of the invention, the binary lambda probe, which at the lambda value of 1 a resistance jump makes a second, broadband lambda probe in immediate spatial proximity assigned to each other. With this combination can the broadband lambda probe with the help of binary a value Lambda = 1 are calibrated so that the broadband lambda probe is calibrated for drift. It shows a continuously changing Resistance, preferably linear in the range of lambda 0.8-1.2 on. Due to the high accuracy of the determination of the Value of lambda in the range around lambda = 1, one improved control of an engine, especially in dynamic operating states can be achieved. The required high accuracy in a small measuring range can be achieved with the help of the lambda sensor additionally used according to the invention be achieved. Here are on a sensor element oxygen sensitive materials with a jump and one broadband sensor characteristic applied, preferably in close proximity to each other, or even on a common substrate, which is the same Temperature. About the step signal can in the preferably temperature-controlled in each operating state Broadband probe can be calibrated exactly. In addition, you can also records very rapid temperature fluctuations in the exhaust gas which are usually a falsification of the Sensor signal condition if both sensor elements are on a common substrate with the same temperature,  which is heated in a manner known per se. Besides, will due to the immediate spatial proximity to each other also in about the otherwise different across the flow range concentrated gas mixture measured practically identical gas. It is also possible to vary the working temperature the common substrate to compensate for drift to take.

Zweckmäßige Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Appropriate refinements and developments of the invention are marked in the subclaims.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend unter Bezugnahme auf die Zeichnung näher erläutert. In dieser zeigt:An embodiment of the invention is described below Reference to the drawing explained in more detail. In this shows:

Fig. 1 zwei Lambda-Sonden auf einem Substrat, in Draufsicht; Figure 1 shows two lambda probes on a substrate, in plan view.

Fig. 2 das Substrat gemäß Fig. 1 in Draufsicht; FIG. 2 shows the substrate according to FIG. 1 in plan view;

Fig. 3 bis 6 Ersatzwiderstandsschaubilder der Komponenten auf dem Substrat gemäß den Fig. 1 und 2; Fig. 3 to 6 equivalent resistance diagrams of the components on the substrate of FIGS. 1 and 2;

Fig. 7 ein Widerstandsschaubild über den Wert Lambda der binären Lambda Sonde und Fig. 7 is a resistance diagram of the lambda value of the binary lambda probe and

Fig. 8 ein Widerstandsschaubild über den Wert Lambda der breitbandigen Lambda-Sonde mit einer Kurvenschar. Fig. 8 is a resistance diagram of the lambda value of the broadband lambda probe with a family of curves.

In Fig. 1 ist ein insgesamt in schematischer und teilweise abgebrochener Draufsicht dargestelltes Substrat 10 dargestellt. Auf dieses ist in an sich bekannter Weise in Schichttechnik mittels Siebdruck eine erste, breitbandige Lambda-Sonde 11, eine binäre Lambda-Sonde 12 und eine schematisch mit 13 bezeichneten Temperatursensor vorgesehen, die über insgesamt mit 14 bezeichnete Abschlußleitungen angeschlossen sind, welche auch als auf das Substrat aufgebrachte Leiterbahnen, vorzugsweise auch in Dickschichttechnik ausgebildet sind.In Fig. 1, a total of illustrated schematically and in partially broken plan view of the substrate 10 is shown. A first, broadband lambda probe 11 , a binary lambda probe 12 and a temperature sensor, schematically denoted by 13, are provided on this in a manner known per se in layer technology by means of screen printing, which are connected via a total of 14 terminating lines, which are also referred to as the substrate applied conductor tracks, are preferably also formed in thick-film technology.

Auf der Rückseite (Fig. 2) des Substrates 10 ist eine insgesamt mit 15 bezeichnete Widerstandsheizschicht angebracht, die über zwei Anschlußkontaktleitungen 16 an eine elektrische Spannungsquelle anschließbar ist.On the back ( FIG. 2) of the substrate 10 there is a resistance heating layer, denoted overall by 15 , which can be connected to an electrical voltage source via two connecting contact lines 16 .

Hierbei läßt sich das elektrische Verhalten der beiden Lambda-Sonden 11, 12 des Temperatursensors 13 sowie der Sensorheizung 15 als elektrischer Widerstand im Ersatzschaubild, wie in den Fig. 3 bis 6 gezeigt, darstellen.Here, the electrical behavior of the two lambda probes 11 , 12 of the temperature sensor 13 and the sensor heater 15 can be represented as an electrical resistance in the equivalent diagram, as shown in FIGS. 3 to 6.

Fig. 8 zeigt ferner eine Kurvenschar des elektrischen Widerstandes über dem Wert vom Lambda, bei verschiedenen Betriebstemperaturen, nämlich bei 890°C, 900°Cund 910°C. Es ist ersichtlich, daß mit steigender Temperatur auch der Widerstand bei jeweils gleichem Wert von Lambda sinkt. Ferner ist ersichtlich, daß sich die einzelnen Kurven in dem Bereich von 0,8 < Lambda < 1,2 etwa linear verhalten. Figure 8 also shows a family of curves of electrical resistance versus lambda at different operating temperatures, namely 890 ° C, 900 ° C and 910 ° C. It can be seen that with increasing temperature, the resistance also decreases with the same value of lambda. It can also be seen that the individual curves behave approximately linearly in the range from 0.8 <lambda <1.2.

Demgegenüber ist die binäre sprungartige Lambda-Sonde, deren Widerstandsschaubild in Fig. 7 dargestellt ist, sprungartig verändert und bei einer einzigen Betriebstemperatur dargestellt.In contrast, the binary jump-like lambda probe, the resistance diagram of which is shown in FIG. 7, has changed suddenly and is shown at a single operating temperature.

Claims (4)

1. Kombination einer beheizten Lambda-Sonde mit sprungförmiger bzw. binärer Sensorcharakteristik mit einer weiteren beheizten Lambda-Sonde für die Bestimmung des Lambdawertes in einem Gasgemisch, beispielsweise im Abgas, vorzugsweise von Verbrennungsmotoren, wobei das Ausgangssignal der einen zur Kalibrierung der anderen Lambda-Sonde dient, dadurch gekennzeichnet, daß die beiden Lambda-Sonden in unmittelbarer räumlichen Nähe zueinander angeordnet sind und daß die andere Lambda-Sonde eine breitbandige Sensor-Charakteristik aufweist.1. Combination of a heated lambda probe with a jump-shaped or binary sensor characteristic with a further heated lambda probe for determining the lambda value in a gas mixture, for example in the exhaust gas, preferably from internal combustion engines, the output signal of one being used to calibrate the other lambda probe serves, characterized in that the two lambda probes are arranged in close spatial proximity to one another and that the other lambda probe has a broadband sensor characteristic. 2. Kombination nach Anspruch 1, dadurch gekennzeichnet, daß die beiden Lambda-Sonden auf demselben Substrat angeordnet sind.2. Combination according to claim 1, characterized in that the two lambda probes are arranged on the same substrate are. 3. Kombination nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Lambda-Sonde mit breitbandiger Sensorcharakteristik von der Lambda-Sonde mit binärer Sensorcharakteristik kalibriert wird.3. Combination according to claim 1 or 2, characterized characterized in that the lambda probe with broadband Sensor characteristic of the lambda probe with binary Sensor characteristic is calibrated. 4. Kombination nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Lambda-Sonde mit breitbandiger Sensorcharakteristik von einem Temperatursensor bezüglich der Temperatur kalibriert wird.4. Combination according to one of claims 1 to 3, characterized in that the lambda probe with broadband Sensor characteristic of a temperature sensor with respect to Temperature is calibrated.
DE4320881A 1993-02-26 1993-06-23 Combination of lambda probes Withdrawn DE4320881A1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
DE4320881A DE4320881A1 (en) 1993-02-26 1993-06-23 Combination of lambda probes
ES94906928T ES2107812T3 (en) 1993-02-26 1994-02-09 COMBINATION OF LAMBDA PROBES.
EP94906928A EP0686232B1 (en) 1993-02-26 1994-02-09 Combination of lambda sensors
US08/507,462 US5658445A (en) 1993-02-26 1994-02-09 Combination of lambda probes
AT94906928T ATE158059T1 (en) 1993-02-26 1994-02-09 COMBINATION OF LAMBDA PROBE
PCT/EP1994/000370 WO1994019593A1 (en) 1993-02-26 1994-02-09 Combination of lambda sensors
DE59404036T DE59404036D1 (en) 1993-02-26 1994-02-09 COMBINATION OF LAMBDA PROBE
KR1019950703612A KR960701290A (en) 1993-02-26 1994-02-09 Combined lambda sensor
JP6518609A JPH08507143A (en) 1993-02-26 1994-02-09 Lambda sensor combination

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4306035 1993-02-26
DE4320881A DE4320881A1 (en) 1993-02-26 1993-06-23 Combination of lambda probes

Publications (1)

Publication Number Publication Date
DE4320881A1 true DE4320881A1 (en) 1994-09-01

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Application Number Title Priority Date Filing Date
DE4320881A Withdrawn DE4320881A1 (en) 1993-02-26 1993-06-23 Combination of lambda probes

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KR (1) KR960701290A (en)
DE (1) DE4320881A1 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5974787A (en) * 1995-10-31 1999-11-02 Siemens Aktiengesellschaft Method for testing the functional capability of a catalytic converter with an oxygen sensor
US6085575A (en) * 1997-10-10 2000-07-11 Heraeus Electro-Nite International N.V. Process for the determination of the exhaust gas temperature and of the air/fuel ratio lambda and a sensor arrangement for execution of the process
DE19806110C2 (en) * 1997-10-10 2001-01-04 Heraeus Electro Nite Int Method for determining the exhaust gas temperature and the air / fuel ratio lambda and sensor arrangement for carrying out the method
DE10151020A1 (en) * 2001-10-16 2003-04-30 Infineon Technologies Ag Circuit arrangement, sensor array and biosensor array
DE10161901A1 (en) * 2001-12-17 2003-06-26 Volkswagen Ag Compensating engine exhaust gas sensor linear characteristic offset involves allowing offset compensation value determination only if reference sensor signal in tolerance field for defined time
WO2008025631A1 (en) * 2006-09-01 2008-03-06 Robert Bosch Gmbh Circuit arrangement for operating a guide probe
DE102007015362A1 (en) 2007-03-30 2008-10-02 Volkswagen Ag Method for lambda control in combustion engine of motor vehicle, involves using measuring signal on two points of range of lambda-values, and correcting measuring signal on one of two points
DE102007016276A1 (en) 2007-04-04 2008-10-09 Volkswagen Ag Lambda control with a characteristic adaptation
DE102007029029A1 (en) 2007-06-23 2008-12-24 Volkswagen Ag Lambda regulation method for use in internal combustion engine of motor vehicle, involves determining lambda deviation from rear sensor produced by rear lambda sensor and adapting conversion rule under consideration of determined deviation
DE102007038478A1 (en) 2007-08-14 2009-02-19 Volkswagen Ag Method for λ control in fuel-shortage or excess fuel areas in a Nernst probe
DE102014007168A1 (en) * 2014-05-15 2015-11-19 Audi Ag Method for operating an exhaust system for an internal combustion engine and corresponding exhaust system
DE102006049656B4 (en) * 2006-10-18 2016-02-11 Volkswagen Ag Lambda control with a jump lambda probe
DE102016110259A1 (en) 2016-06-02 2017-12-07 Eurox Sauerstoff Mess-Systeme GmbH Method for checking and / or calibrating a measuring element of a measuring system for the oxygen content in a gas mixture and measuring system

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DE4039429A1 (en) * 1990-12-11 1992-06-17 Abb Patent Gmbh METHOD AND DEVICE FOR CHECKING A CATALYST
DE4039762A1 (en) * 1990-12-13 1992-06-17 Bosch Gmbh Robert METHOD AND DEVICE FOR CHECKING THE AGING STATE OF A CATALYST
DE4125154A1 (en) * 1991-07-30 1993-02-04 Bosch Gmbh Robert METHOD AND DEVICE FOR MONITORING THE LAMB PROBE IN AN INTERNAL COMBUSTION ENGINE
DE4228052A1 (en) * 1991-09-30 1993-04-01 Siemens Ag EXHAUST GAS SENSOR FOR CONTROLLING THE OPERATION OF INTERNAL COMBUSTION ENGINES
DE4132008A1 (en) * 1991-09-26 1993-04-01 Bosch Gmbh Robert METHOD AND DEVICE FOR CHECKING THE FUNCTIONALITY OF AN ELECTRICAL HEATING IN MOTOR VEHICLES
DE4133117A1 (en) * 1991-10-05 1993-04-08 Audi Ag METHOD FOR THE EXHAUST GAS DETOXIFICATION OF INTERNAL COMBUSTION ENGINES

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DE2304622A1 (en) * 1973-01-31 1974-08-15 Bosch Gmbh Robert DEVICE FOR MONITORING CATALYTIC REACTORS IN EXHAUST GAS DETOXIFICATION SYSTEMS OF COMBUSTION MACHINES
DE2444334A1 (en) * 1974-09-17 1976-03-25 Bosch Gmbh Robert METHOD AND EQUIPMENT FOR MONITORING THE ACTIVITY OF CATALYTIC REACTORS
DE4039429A1 (en) * 1990-12-11 1992-06-17 Abb Patent Gmbh METHOD AND DEVICE FOR CHECKING A CATALYST
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DE4125154A1 (en) * 1991-07-30 1993-02-04 Bosch Gmbh Robert METHOD AND DEVICE FOR MONITORING THE LAMB PROBE IN AN INTERNAL COMBUSTION ENGINE
DE4132008A1 (en) * 1991-09-26 1993-04-01 Bosch Gmbh Robert METHOD AND DEVICE FOR CHECKING THE FUNCTIONALITY OF AN ELECTRICAL HEATING IN MOTOR VEHICLES
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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5974787A (en) * 1995-10-31 1999-11-02 Siemens Aktiengesellschaft Method for testing the functional capability of a catalytic converter with an oxygen sensor
US6085575A (en) * 1997-10-10 2000-07-11 Heraeus Electro-Nite International N.V. Process for the determination of the exhaust gas temperature and of the air/fuel ratio lambda and a sensor arrangement for execution of the process
DE19806110C2 (en) * 1997-10-10 2001-01-04 Heraeus Electro Nite Int Method for determining the exhaust gas temperature and the air / fuel ratio lambda and sensor arrangement for carrying out the method
DE10151020A1 (en) * 2001-10-16 2003-04-30 Infineon Technologies Ag Circuit arrangement, sensor array and biosensor array
US7019305B2 (en) 2001-10-16 2006-03-28 Infineon Technologies Ag Biosensor circuit and sensor array consisting of a plurality of said biosensor circuits and biosensor array
DE10161901B4 (en) * 2001-12-17 2010-10-28 Volkswagen Ag Method and device for compensating the offset of the linear sensor characteristic of a sensor arranged in the exhaust gas of an internal combustion engine
DE10161901A1 (en) * 2001-12-17 2003-06-26 Volkswagen Ag Compensating engine exhaust gas sensor linear characteristic offset involves allowing offset compensation value determination only if reference sensor signal in tolerance field for defined time
CN101506650B (en) * 2006-09-01 2013-12-25 罗伯特.博世有限公司 Circuit arrangement for driving a guide detector
WO2008025631A1 (en) * 2006-09-01 2008-03-06 Robert Bosch Gmbh Circuit arrangement for operating a guide probe
DE102006049656B4 (en) * 2006-10-18 2016-02-11 Volkswagen Ag Lambda control with a jump lambda probe
DE102007015362A1 (en) 2007-03-30 2008-10-02 Volkswagen Ag Method for lambda control in combustion engine of motor vehicle, involves using measuring signal on two points of range of lambda-values, and correcting measuring signal on one of two points
DE102007016276A1 (en) 2007-04-04 2008-10-09 Volkswagen Ag Lambda control with a characteristic adaptation
DE102007029029A1 (en) 2007-06-23 2008-12-24 Volkswagen Ag Lambda regulation method for use in internal combustion engine of motor vehicle, involves determining lambda deviation from rear sensor produced by rear lambda sensor and adapting conversion rule under consideration of determined deviation
DE102007038478A1 (en) 2007-08-14 2009-02-19 Volkswagen Ag Method for λ control in fuel-shortage or excess fuel areas in a Nernst probe
DE102014007168A1 (en) * 2014-05-15 2015-11-19 Audi Ag Method for operating an exhaust system for an internal combustion engine and corresponding exhaust system
DE102014007168B4 (en) * 2014-05-15 2020-03-05 Audi Ag Method for operating an exhaust system for an internal combustion engine and corresponding exhaust system
DE102016110259A1 (en) 2016-06-02 2017-12-07 Eurox Sauerstoff Mess-Systeme GmbH Method for checking and / or calibrating a measuring element of a measuring system for the oxygen content in a gas mixture and measuring system

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