EP1074718B1 - Method for testing plausibility of engine and probe parameters using a wide range lambda sensor - Google Patents
Method for testing plausibility of engine and probe parameters using a wide range lambda sensor Download PDFInfo
- Publication number
- EP1074718B1 EP1074718B1 EP00115537A EP00115537A EP1074718B1 EP 1074718 B1 EP1074718 B1 EP 1074718B1 EP 00115537 A EP00115537 A EP 00115537A EP 00115537 A EP00115537 A EP 00115537A EP 1074718 B1 EP1074718 B1 EP 1074718B1
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- European Patent Office
- Prior art keywords
- internal combustion
- combustion engine
- lambda probe
- signal
- lambda
- 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
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- 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
- F02D41/1493—Details
- F02D41/1495—Detection of abnormalities in the air/fuel ratio feedback system
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- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
Definitions
- the invention relates to a method for monitoring the function of an exhaust gas duct an internal combustion engine arranged lambda probe with the in the preamble of Claim 1 mentioned features.
- Exhaust gas channel at least one lambda probe, in particular a broadband lambda probe, to arrange.
- an oxygen concentration in an exhaust gas can be detected and a conclusion on the ratio of an oxygen fraction to a fuel fraction in the air-fuel mixture supplied to the combustion process.
- Broadband lambda probes enable measurement of lambda in a range of about 0.7 to ⁇ .
- the lambda probe Measuring signal for regulating the air-fuel mixture according to the given Requirements for the internal combustion engine used (lambda control).
- the measurement signal is read into an engine control unit and serves as the basis for Measures that, for example, regulate an injection system or intake air include.
- Lambda probes of this type are usually also used to monitor in addition the exhaust duct arranged catalysts. Redox reactions take place on the catalysts instead, leading to a conversion of pollutants contained in the exhaust gas into less environmentally relevant Lead reaction products.
- the operating mode of the internal combustion engine regulated on the basis of the measurement signal of the lambda probe is that provided Measuring signal faulty due to a defect in the lambda probe, this can lead to lead to the setting of an operating mode which is not economical to use, and to others may reduce pollutant emissions by means of Catalysts are no longer granted to the extent necessary.
- US Pat. No. 5,550,762 is a diagnostic system for an electronic one Automotive system known in which a virtual computer model for diagnosis of a perfectly working automobile.
- the electronic Automotive system during the diagnosis of the other automotive components of the vehicle separately, causing malfunction of peripheral automotive components cannot influence the performance of the tested system.
- the invention has for its object to provide a method that allows a function monitoring of the lambda probe and thus one Eliminate possible defects of the lambda probe.
- this object is achieved by the method for Function monitoring in the exhaust duct of the internal combustion engine arranged lambda probe solved with the features mentioned in claim 1.
- a predefinable number is provided the control values first of all a correlation calculation, in particular one Subject to cross correlation.
- the correlation calculation then provides one correlated control value. If the control value or the correlated control value above the limit value is preferably a Maintenance signal generated (on-board diagnosis). Based on the maintenance signal appropriate information from a vehicle driver is then given or the maintenance personnel a necessary maintenance measure be proposed.
- the diagnosis period is such choose that he immediately a load change or a change in speed of the Internal combustion engine connects, since there are particularly significant measurement signals. It is therefore not necessary to use special functions to monitor the lambda probe Let signal patterns run and thus the normal operation of the Interrupt internal combustion engine.
- Parameters such as one are incorporated into the model for the internal combustion engine Intake air mass, a fuel mass and the speed. Of course you can too other operating variables that are usually provided in an engine control unit, can be used to adjust the model more precisely.
- FIG. 10 An arrangement 10 of an internal combustion engine 12 is shown in FIG a catalytic converter 16 arranged in an exhaust gas duct 14 and two lambda probes 18, 20 includes.
- a temperature sensor 22 is additionally arranged downstream of the catalytic converter 16, with which an exhaust gas temperature can be detected.
- the catalytic converter 16 serves one Conversion of pollutants contained in the exhaust gas of the internal combustion engine 12.
- a ratio of an oxygen fraction to a fuel fraction in one to be burned Air-fuel mixture provides a lambda value.
- the lambda probe 18 can be an oxygen concentration immediately behind the internal combustion engine 12, the oxygen concentration being clearly assigned to a lambda value can be.
- a conversion rate of the catalytic converter 16 can be determined using a Monitor signal provided by the lambda probe 20 in a known manner.
- the Lambda value is continuously recorded according to the exemplary embodiment, that is, the Lambda probes 18, 20 are so-called broadband lambda probes.
- a range of measurements for Broadband lambda probes range from about 0.7 to ⁇ lambda. How it works such probes is known, so that in the context of the present description should not be discussed in more detail.
- the measurement signals detected by the sensors 18, 20, 22 are fed into an engine control unit 24 read, evaluated and to control an operating mode of the Internal combustion engine 12 used.
- the internal combustion engine 12 is a means assigned, for example, an injection system 26 or an exhaust gas recirculation include.
- the exhaust gas recirculation can reduce the volume flow intake air by means of a throttle valve 28 and by simultaneous supply low-oxygen exhaust gas take place via an exhaust gas reflux valve 30. In this way it is Oxygen content of a via an intake pipe 32 of the internal combustion engine 12 provided intake air mass can be specified.
- Exhaust gas turbochargers of turbocharged engines have at least one lambda sensor behind them Turbine in the exhaust gas.
- FIG. 2 shows a block diagram for function monitoring of the lambda probes 18, 20.
- a step S1 in addition to that by the lambda probes 18, 20 Provided measurement signal determines a target signal.
- a model for the internal combustion engine is used for this 12.
- the model includes parameters such as the intake air mass, a injected fuel mass or a speed of the internal combustion engine 12. It is also conceivable to use other sizes, for example in the engine control unit 24 are provided to be used to optimize the model.
- the operating mode of the internal combustion engine 12 must be used for function monitoring can not be controlled according to a signal pattern, but any Operating points can be used for monitoring. It has proven to be advantageous a diagnosis period immediately after a load change or a change in the Let the speed of the internal combustion engine 12 begin.
- a ratio of the measurement signal to the target signal provides a control value (step S2).
- the control value KW or the correlated control value KW k is then compared in a step S3 with a predefinable limit value GW.
- the limit value GW can also be determined using the model for the internal combustion engine 12. If the control value KW or the correlated control value KW k is below the limit value GW, a new measurement cycle of the function monitoring can follow, starting with step S1. However, if the control value KW or the correlated control value KW k exceeds the limit value GW, a maintenance signal is generated in a step S4. The maintenance signal then serves, for example in an on-board diagnosis, to inform a vehicle driver. Furthermore, the maintenance signal can be used to provide the maintenance personnel with appropriate instructions.
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Funktionsüberwachung einer in einem Abgaskanal
einer Verbrennungskraftmaschine angeordneten Lambda-Sonde mit den im Oberbegriff des
Anspruchs 1 genannten Merkmalen.The invention relates to a method for monitoring the function of an exhaust gas duct
an internal combustion engine arranged lambda probe with the in the preamble of
Zur Regelung eines Betriebsmodus der Verbrennungskraftmaschine ist es bekannt, in dem Abgaskanal wenigstens eine Lambda-Sonde, insbesondere eine Breitband-Lambda-Sonde, anzuordnen. Mit Hilfe der Lambda-Sonde kann eine Sauerstoffkonzentration in einem Abgas erfaßt werden und ein Rückschluß auf das Verhältnis eines Sauerstoffanteils zu einem Kraftstoffanteil in dem dem Verbrennungsprozeß zugeführten Luft-Kraftstoff-Gemisch erfolgen. Breitband-Lambda-Sonden ermöglichen eine Messung von Lambda in einem Bereich von zirka 0,7 bis ∞.To control an operating mode of the internal combustion engine, it is known in which Exhaust gas channel at least one lambda probe, in particular a broadband lambda probe, to arrange. With the help of the lambda probe, an oxygen concentration in an exhaust gas can be detected and a conclusion on the ratio of an oxygen fraction to a fuel fraction in the air-fuel mixture supplied to the combustion process. Broadband lambda probes enable measurement of lambda in a range of about 0.7 to ∞.
In modernen Verbrennungskraftmaschinen wird das durch die Lambda-Sonde bereitgestellte Meßsignal zur Regelung des Luft-Kraftstoff-Gemisches entsprechend den gegebenen Anforderungen an die Verbrennungskraftmaschine genutzt (Lambda-Regelung). Dazu wird üblicherweise das Meßsignal in ein Motorsteuergerät eingelesen und dient dort als Basis für Maßnahmen, die beispielsweise eine Regelung eines Einspritzsystems oder einer Ansaugluft umfassen.In modern internal combustion engines, this is provided by the lambda probe Measuring signal for regulating the air-fuel mixture according to the given Requirements for the internal combustion engine used (lambda control). This will Usually the measurement signal is read into an engine control unit and serves as the basis for Measures that, for example, regulate an injection system or intake air include.
Üblicherweise dienen derartige Lambda-Sonden auch zur Überwachung von zusätzlich in dem Abgaskanal angeordneten Katalysatoren. An den Katalysatoren finden Redoxreaktionen statt, die zu einer Konvertierung von im Abgas enthaltenen Schadstoffen in weniger umweltrelevante Reaktionsprodukte führen. Lambda probes of this type are usually also used to monitor in addition the exhaust duct arranged catalysts. Redox reactions take place on the catalysts instead, leading to a conversion of pollutants contained in the exhaust gas into less environmentally relevant Lead reaction products.
Wie bereits erläutert, wird der Betriebsmodus der Verbrennungskraftmaschine anhand des Meßsignals der Lambda-Sonde geregelt. Ist jedoch das bereitgestellte Meßsignal fehlerhaft aufgrund eines Defektes der Lambda-Sonde, so kann dies zum einen zur Einstellung eines verbrauchsungünstigen Betriebsmodus führen, und zum anderen kann gegebenenfalls eine Reduktion einer Schadstoffemission mittels der Katalysatoren nicht mehr in dem erforderlichen Maße gewährt werden.As already explained, the operating mode of the internal combustion engine regulated on the basis of the measurement signal of the lambda probe. However, is that provided Measuring signal faulty due to a defect in the lambda probe, this can lead to lead to the setting of an operating mode which is not economical to use, and to others may reduce pollutant emissions by means of Catalysts are no longer granted to the extent necessary.
Aus der US PS 5,676,119 ist bereits ein Luft-/Kraftstoffkontrollsystem für Verbrennungsmotoren zur Plausibilitätsprüfung der Signale einer Lambda-Sonde im Abgaskanal des Verbrennungsmotors bekannt. Das bekannte System ermöglicht eine Plausibilitätsprüfung der Lambda-Sonde bei stabilen Betriebsbedingungen des Verbrennungsmotors. Für den Fall, dass der Verbrennungsmotor in einen Zustand mit verminderter Sensortemperatur ist, sind Mittel vorgesehen, um die Plausibilitätsprüfung der Lambda-Sonde zu verhindern.An air / fuel control system for is already from US Pat. No. 5,676,119 Internal combustion engines for the plausibility check of the signals of a lambda probe in the Exhaust gas duct of the internal combustion engine is known. The known system enables a plausibility check of the lambda probe under stable operating conditions of the Combustion engine. In the event that the internal combustion engine is in a state with a reduced sensor temperature, means are provided for the Prevent plausibility check of the lambda probe.
Ferner ist aus der US PS 5,550,762 ein Diagnosesystem für ein elektronisches Automotivesystem bekannt, bei dem zur Diagnose ein virtuelles Computermodell eines perfekt arbeitenden Automobils verwendet wird. Dabei wird das elektronische Automotivesystem während der Diagnose von den anderen Automotivkomponenten des Fahrzeugs getrennt, so dass Fehlfunktionen peripherer Automotivkomponenten die Performanz des getesteten Systems nicht beeinflussen können.Furthermore, US Pat. No. 5,550,762 is a diagnostic system for an electronic one Automotive system known in which a virtual computer model for diagnosis of a perfectly working automobile. The electronic Automotive system during the diagnosis of the other automotive components of the vehicle separately, causing malfunction of peripheral automotive components cannot influence the performance of the tested system.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Verfügung zu stellen, das eine Funktionsüberwachung der Lambda-Sonde erlaubt und damit eine Behebung möglicher Defekte der Lambda-Sonde ermöglicht. The invention has for its object to provide a method that allows a function monitoring of the lambda probe and thus one Eliminate possible defects of the lambda probe.
Erfindungsgemäß wird diese Aufgabe durch das Verfahren zur
Funktionsüberwachung der in dem Abgaskanal der Verbrennungskraftmaschine
angeordneten Lambda-Sonde mit den im Anspruch 1 genannten Merkmalen gelöst.According to the invention, this object is achieved by the method for
Function monitoring in the exhaust duct of the internal combustion engine
arranged lambda probe solved with the features mentioned in
Zur Kompensation statistischer Ausreißer ist vorgesehen, eine vorgebbare Anzahl der Kontrollwerte zunächst einer Korrelationsrechnung, insbesondere einer Kreuzkorrelation, zu unterwerfen. Die Korrelationsrechnung liefert dann einen korrelierten Kontrollwert. Beim Überschreiten des Kontrollwertes oder des korrelierten Kontrollwertes über den Grenzwert wird in bevorzugter Weise ein Wartungssignal erzeugt (On-board-Diagnose). Anhand des Wartungssignales kann dann eine entsprechende Information eines Fahrzeugführers erfolgen beziehungsweise dem Wartungspersonal eine notwendige Wartungsmaßnahme vorgeschlagen werden. To compensate for statistical outliers, a predefinable number is provided the control values first of all a correlation calculation, in particular one Subject to cross correlation. The correlation calculation then provides one correlated control value. If the control value or the correlated control value above the limit value is preferably a Maintenance signal generated (on-board diagnosis). Based on the maintenance signal appropriate information from a vehicle driver is then given or the maintenance personnel a necessary maintenance measure be proposed.
In vorteilhafter Ausgestaltung der Erfindung ist vorgesehen, den Diagnosezeitraum derart zu wählen, daß er sich unmittelbar einem Lastwechsel oder einer Änderung einer Drehzahl der Verbrennungskraftmaschine anschließt, da hier besonders signifikante Meßsignale vorliegen. Es ist demnach nicht notwendig, zur Funktionsüberwachung der Lambda-Sonde spezielle Signalmuster ablaufen zu lassen und damit den Regelbetrieb der Verbrennungskraftmaschine zu unterbrechen.In an advantageous embodiment of the invention, it is provided that the diagnosis period is such choose that he immediately a load change or a change in speed of the Internal combustion engine connects, since there are particularly significant measurement signals. It is therefore not necessary to use special functions to monitor the lambda probe Let signal patterns run and thus the normal operation of the Interrupt internal combustion engine.
In das Modell für die Verbrennungskraftmaschine fließen Parameter ein, wie eine Ansaugluftmasse, eine Kraftstoffmasse und die Drehzahl. Selbstverständlich können auch andere Betriebsgrößen, die üblicherweise in einem Motorsteuergerät bereitgestellt werden, zur genaueren Anpassung des Modells verwendet werden.Parameters such as one are incorporated into the model for the internal combustion engine Intake air mass, a fuel mass and the speed. Of course you can too other operating variables that are usually provided in an engine control unit, can be used to adjust the model more precisely.
Weitere bevorzugte Ausgestaltungen der Erfindung ergeben sich aus den übrigen, in den Unteransprüchen genannten Merkmalen.Further preferred refinements of the invention result from the others in the Characteristics mentioned subclaims.
Die Erfindung wird nachfolgend in einem Ausführungsbeispiel anhand der zugehörigen Zeichnungen näher erläutert. Es zeigen:
Figur 1- eine Anordnung von Lambda-Sonden in einem Abgaskanal einer Verbrennungskraftmaschine und
Figur 2- ein Blockschaltbild zur Funktionsüberwachung der Lambda-Sonden.
- Figure 1
- an arrangement of lambda probes in an exhaust duct of an internal combustion engine and
- Figure 2
- a block diagram for monitoring the function of the lambda probes.
In der Figur 1 ist eine Anordnung 10 einer Verbrennungskraftmaschine 12 dargestellt, die
einen in einem Abgaskanal 14 angeordneten Katalysator 16 und zwei Lambda-Sonden 18,
20 umfaßt. Stromab des Katalysators 16 ist zusätzlich ein Temperatursensor 22 angeordnet,
mit dem eine Abgastemperatur erfaßt werden kann. Der Katalysator 16 dient einer
Konvertierung von im Abgas der Verbrennungskraftmaschine 12 enthaltenen Schadstoffen.An
Ein Verhältnis eines Sauerstoffanteils zu einem Kraftstoffanteil in einem zu verbrennenden
Luft-Kraftstoff-Gemisch liefert einen Lambdawert. Insbesondere mit Hilfe der Lambda-Sonde
18 läßt sich eine Sauerstoffkonzentration unmittelbar hinter der Verbrennungskraftmaschine
12 erfassen, wobei die Sauerstoffkonzentration eindeutig einem Lambdawert zugeordnet
werden kann. Ferner läßt sich eine Konvertierungsrate des Katalysators 16 anhand eines
durch die Lambda-Sonde 20 bereitgestellten Signals in bekannter Weise überwachen. Der
Lambdawert wird gemäß dem Ausführungsbeispiel kontinuierlich erfaßt, das heißt, die
Lambda-Sonden 18, 20 sind sogenannte Breitband-Lambda-Sonden. Ein Meßwertbereich für
Breitband-Lambda-Sonden erstreckt sich von Lambda zirka 0,7 bis ∞. Die Funktionsweise
derartiger Sonden ist bekannt, so daß im Rahmen der vorliegenden Beschreibung hierauf
nicht näher eingegangen werden soll.A ratio of an oxygen fraction to a fuel fraction in one to be burned
Air-fuel mixture provides a lambda value. Especially with the help of the
Die mittels der Sensoren 18, 20, 22 erfaßten Meßsignale werden in ein Motorsteuergerät 24
eingelesen, ausgewertet und zur Regelung eines Betriebsmodus der
Verbrennungskraftmaschine 12 genutzt. Dazu sind der Verbrennungskraftmaschine 12 Mittel
zugeordnet, die beispielsweise ein Einspritzsystem 26 oder eine Abgasrückführung
umfassen. Durch die Abgasrückführung kann eine Reduzierung eines Volumenstromes
angesaugter Luft mittels einer Drosselklappe 28 und durch gleichzeitige Zuführung
sauerstoffarmen Abgases über ein Abgasrückflußventil 30 erfolgen. Auf diese Weise ist der
Sauerstoffanteil einer über ein Saugrohr 32 der Verbrennungskraftmaschine 12
bereitgestellten Ansaugluftmasse vorgebbar. Im Falle hier nicht dargestellter durch
Abgasturbolader aufgeladener Motoren sitzt zumindest eine Lambda-Sonde hinter der
Turbine im Abgas.The measurement signals detected by the
Die Figur 2 zeigt ein Blockschaltbild zur Funktionsüberwachung der Lambda-Sonden 18, 20.
Zunächst wird in einem Schritt S1 neben dem durch die Lambda-Sonden 18, 20 zur
Verfügung gestellten Meßsignal ein Sollsignal ermittelt. Dazu dient ein Modell für die Verbrennungskraftmaschine
12. Das Modell umfaßt Parameter, wie die Ansaugluftmasse, eine
eingespritzte Kraftstoffmasse oder auch eine Drehzahl der Verbrennungskraftmaschine 12.
Ebenso ist denkbar, auch andere Größen, die beispielsweise in dem Motorsteuergerät 24
bereitgestellt werden, zur Optimierung des Modells heranzuziehen.FIG. 2 shows a block diagram for function monitoring of the
Der Betriebsmodus der Verbrennungskraftmaschine 12 muß zur Funktionsüberwachung
nicht entsprechend einem Signalmuster gesteuert werden, sondern es können beliebige
Betriebspunkte für die Überwachung genutzt werden. Als vorteilhaft hat es sich erwiesen,
einen Diagnosezeitraum unmittelbar nach einem Lastwechsel oder einer Änderung der
Drehzahl der Verbrennungskraftmaschine 12 beginnen zu lassen. The operating mode of the
Ein Verhältnis des Meßsignals zum Sollsignal liefert einen Kontrollwert (Schritt S2). Zur Kompensation statistischer Ausreißer ist es dabei vorteilhaft, zunächst eine vorgebbare Anzahl der Kontrollwerte KW in eine Korrelationsrechnung einzubeziehen, die einen korrelierten Kontrollwert KWk liefert.A ratio of the measurement signal to the target signal provides a control value (step S2). To compensate for statistical outliers, it is advantageous to first include a predeterminable number of control values KW in a correlation calculation, which delivers a correlated control value KW k .
Der Kontrollwert KW oder der korrelierte Kontrollwert KWk wird anschließend in einem Schritt
S3 mit einem vorgebbaren Grenzwert GW verglichen. Auch der Grenzwert GW kann anhand
des Modells für die Verbrennungskraftmaschine 12 festgelegt werden. Liegt der Kontrollwert
KW beziehungsweise der korrelierte Kontrollwert KWk unterhalb des Grenzwertes GW, kann
sich ein erneuter Meßzyklus der Funktionsüberwachung beginnend mit dem Schritt S1 anschließen.
Überschreitet jedoch der Kontrollwert KW beziehungsweise der korrelierte
Kontrollwert KWk den Grenzwert GW, so wird in einem Schritt S4 ein Wartungssignal
erzeugt. Das Wartungssignal dient dann, beispielsweise in einer On-board-Diagnose, zur
Information eines Fahrzeugführers. Weiterhin kann das Wartungssignal dazu genutzt
werden, dem Wartungspersonal entsprechende Instruktionen zur Verfügung zu stellen.The control value KW or the correlated control value KW k is then compared in a step S3 with a predefinable limit value GW. The limit value GW can also be determined using the model for the
Claims (4)
- Method for functionally monitoring at least one lambda probe, in particular a broadband lambda probe, which is arranged in an exhaust duct of an internal combustion engine,characterized in that a predefinable number of the check values (KW) is firstly subjected to a correlation calculation, in particular a cross-correlation, and supplies a correlated check value (KWk).(a) a measurement signal of the lambda probe (18, 20) being sensed within a predefinable diagnostic time period,(b) a setpoint signal of the lambda probe (18, 20) being determined by means of a model for the internal combustion engine, parameters such as an intake-air mass flow rate, an injected fuel mass flow rate or a rotational speed of the internal combustion engine (12) being included in the model, and(c) a ratio of the measurement signal with respect to the setpoint signal supplying a check value (KW) and the check value (KW) being compared with a predefined limiting value (GW),
- Method according to Claim 1, characterized in that, when the check value (KW) or the correlated check value (KWk) exceeds the limiting value (GW), a maintenance signal is generated.
- Method according to one of the preceding claims, characterized in that the diagnostic time period starts directly after a load change or a change in the rotational speed of the internal combustion engine (12).
- Method according to one of the preceding claims, characterized in that the limiting value (GW) is defined by means of the model for the internal combustion engine (12).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19936355 | 1999-08-03 | ||
| DE19936355A DE19936355A1 (en) | 1999-08-03 | 1999-08-03 | Procedure for the plausibility check of engine sizes and sensor sizes using a continuous lambda probe |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1074718A2 EP1074718A2 (en) | 2001-02-07 |
| EP1074718A3 EP1074718A3 (en) | 2001-09-26 |
| EP1074718B1 true EP1074718B1 (en) | 2004-11-10 |
Family
ID=7916920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00115537A Expired - Lifetime EP1074718B1 (en) | 1999-08-03 | 2000-07-19 | Method for testing plausibility of engine and probe parameters using a wide range lambda sensor |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1074718B1 (en) |
| AT (1) | ATE282144T1 (en) |
| DE (2) | DE19936355A1 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10029633A1 (en) * | 2000-04-07 | 2001-10-11 | Volkswagen Ag | Multi-flow exhaust system of a multi-cylinder engine and method for controlling an air-fuel ratio |
| DE10111586A1 (en) * | 2001-03-10 | 2002-09-12 | Volkswagen Ag | Process for operating internal combustion engines |
| DE10128969C1 (en) * | 2001-06-15 | 2002-12-12 | Audi Ag | Method for diagnosing guide probe fitted downstream from catalytic converter in system for controlling engine, involves detecting oxygen content in exhaust system for an internal combustion engine. |
| DE10250219A1 (en) * | 2002-10-23 | 2004-05-06 | Volkswagen Ag | Regulator and method for regulating a NOx sensor arranged in an exhaust gas duct of an internal combustion engine |
| DE10307342B4 (en) * | 2003-02-21 | 2005-08-11 | Volkswagen Ag | Device and method for model-based on-board diagnostics |
| JP4459566B2 (en) * | 2003-07-10 | 2010-04-28 | 本田技研工業株式会社 | Exhaust gas sensor deterioration diagnosis device |
| DE102005016075B4 (en) * | 2005-04-08 | 2007-04-12 | Audi Ag | Method for diagnosing a lambda probe assigned to the exhaust gas catalytic converter of an internal combustion engine |
| DE102005034247A1 (en) | 2005-07-22 | 2007-01-25 | Robert Bosch Gmbh | Monitoring of exhaust emission limits |
| JP4697201B2 (en) | 2007-07-19 | 2011-06-08 | トヨタ自動車株式会社 | Abnormality detection device for internal combustion engine |
| JP4816773B2 (en) * | 2009-07-16 | 2011-11-16 | 株式会社デンソー | Exhaust component concentration sensor response detection device |
| DE102009028367A1 (en) | 2009-08-10 | 2011-02-17 | Robert Bosch Gmbh | Method and device for dynamic diagnosis of an exhaust gas probe |
| DE102011088296A1 (en) * | 2011-12-12 | 2013-06-13 | Robert Bosch Gmbh | Method and device for monitoring the dynamics of gas sensors |
| DE102012201033A1 (en) * | 2012-01-25 | 2013-07-25 | Robert Bosch Gmbh | Method and control unit for determining a dead time of an exhaust gas sensor |
| DE102013201734A1 (en) * | 2013-02-04 | 2014-08-07 | Robert Bosch Gmbh | Method for operating oxygen sensor arrangement in exhaust gas system of internal combustion engine, involves detecting values for diagnosis of active oxygen adjustment, where former value represents oxygen storage capacity of catalyst |
| FR3115597B1 (en) * | 2020-10-23 | 2022-09-09 | Vitesco Technologies | Calculator for vehicle probe fouling diagnostics |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5550762A (en) * | 1993-12-20 | 1996-08-27 | Doll; John A. | Diagnostic system for electronic automotive system |
| DE19612212B4 (en) * | 1995-03-31 | 2005-12-08 | Denso Corp., Kariya | Diagnostic device for an air / fuel ratio sensor |
| US5781878A (en) * | 1995-06-05 | 1998-07-14 | Nippondenso Co., Ltd. | Apparatus and method for diagnosing degradation or malfunction of oxygen sensor |
| JP3743577B2 (en) * | 1995-09-25 | 2006-02-08 | 本田技研工業株式会社 | Air-fuel ratio control device for internal combustion engine |
| DE19606652B4 (en) * | 1996-02-23 | 2004-02-12 | Robert Bosch Gmbh | Method of setting the air-fuel ratio for an internal combustion engine with a downstream catalytic converter |
| DE19844994C2 (en) * | 1998-09-30 | 2002-01-17 | Siemens Ag | Method for diagnosing a continuous lambda probe |
-
1999
- 1999-08-03 DE DE19936355A patent/DE19936355A1/en not_active Withdrawn
-
2000
- 2000-07-19 EP EP00115537A patent/EP1074718B1/en not_active Expired - Lifetime
- 2000-07-19 AT AT00115537T patent/ATE282144T1/en not_active IP Right Cessation
- 2000-07-19 DE DE50008573T patent/DE50008573D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE50008573D1 (en) | 2004-12-16 |
| ATE282144T1 (en) | 2004-11-15 |
| EP1074718A3 (en) | 2001-09-26 |
| DE19936355A1 (en) | 2001-02-08 |
| EP1074718A2 (en) | 2001-02-07 |
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