DE102013204112B4 - Method for checking the permissibility of a diagnosis of a particle sensor arranged in an exhaust passage of an internal combustion engine - Google Patents
Method for checking the permissibility of a diagnosis of a particle sensor arranged in an exhaust passage of an internal combustion engine Download PDFInfo
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- DE102013204112B4 DE102013204112B4 DE102013204112.8A DE102013204112A DE102013204112B4 DE 102013204112 B4 DE102013204112 B4 DE 102013204112B4 DE 102013204112 A DE102013204112 A DE 102013204112A DE 102013204112 B4 DE102013204112 B4 DE 102013204112B4
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 13
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 10
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Classifications
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- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
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- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
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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
- F02D41/021—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
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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
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
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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
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1466—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being a soot concentration or content
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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
- F02D41/1494—Control of sensor heater
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- 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
- F01N2550/02—Catalytic activity of catalytic converters
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- 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
- F01N2550/04—Filtering activity of particulate filters
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- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/05—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a particulate sensor
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- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
- F01N2900/1404—Exhaust gas temperature
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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
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
- F02D41/1447—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures with determination means using an estimation
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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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
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- 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
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- 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
- Y02T10/40—Engine management systems
Abstract
Verfahren zur Prüfung der Zulässigkeit einer Diagnose eines in einem Abgaskanal (10) einer Brennkraftmaschine angeordneten Partikelsensors (16), die auf der Grundlage eines Partikel-Messsignals (PM_Mess) des im Abgaskanal (10) angeordneten Partikelsensors (16) durchgeführt wird, dadurch gekennzeichnet, dass der Temperatur-Gradient eines Temperatur-Messsignals (te_Mess) ermittelt wird, welches zumindest ein stromaufwärts vor dem Partikelsensor (16) angeordneter Temperatursensor (12) bereitstellt, dass der Temperatur-Gradient mit einem Schwellenwert (SW) verglichen wird und dass dann, wenn der Temperatur-Gradient den Schwellenwert (SW) übersteigt, die Diagnose des Partikelsensors (16) als unzulässig gesperrt wird.Method for checking the permissibility of a diagnosis of a particle sensor (16) arranged in an exhaust duct (10) of an internal combustion engine, which is carried out on the basis of a particle measurement signal (PM_Mess) of the particle sensor (16) arranged in the exhaust duct (10), characterized in that the temperature gradient of a temperature measurement signal (te_Mess) is determined, which at least one upstream of the particle sensor (16) arranged temperature sensor (12) provides that the temperature gradient with a threshold value (SW) is compared and that if the temperature gradient exceeds the threshold value (SW), the diagnosis of the particle sensor (16) is inhibited as inadmissible.
Description
Die Erfindung geht aus von einem Verfahren zur Prüfung der Zulässigkeit einer Diagnose von in einem Abgaskanal einer Brennkraftmaschine angeordneten Komponenten auf der Grundlage eines Partikelsensor-Messsignals und von einer Vorrichtung zur Durchführung des Verfahrens nach der Gattung der unabhängigen Ansprüche.The invention is based on a method for checking the permissibility of a diagnosis of components arranged in an exhaust duct of an internal combustion engine on the basis of a particle sensor measuring signal and on an apparatus for carrying out the method according to the preamble of the independent claims.
Gegenstand der vorliegenden Erfindung sind auch ein Steuergerätprogramm sowie ein Steuergerät-Programmprodukt.The present invention also relates to a controller program and a controller program product.
Stand der TechnikState of the art
In der Offenlegungsschrift
In der Offenlegungsschrift
Weitere Partikelsensoren sind aus der
Der Erfindung liegt die Aufgabe zugrunde, ein einfaches Verfahren zur Prüfung der Zulässigkeit einer Diagnose von in einem Abgaskanal einer Brennkraftmaschine angeordneten Komponenten, und eine Vorrichtung zur Durchführung des Verfahrens anzugeben, die mit einfachen Mitteln realisierbar ist.The invention has for its object to provide a simple method for testing the permissibility of a diagnosis of arranged in an exhaust passage of an internal combustion engine components, and an apparatus for performing the method, which can be realized by simple means.
Offenbarung der ErfindungDisclosure of the invention
Die erfindungsgemäße Vorgehensweise geht aus von einem Verfahren zur Prüfung der Zulässigkeit einer Diagnose eines in einem Abgaskanal einer Brennkraftmaschine angeordneten Partikelsensors, die auf der Grundlage eines Partikel-Messsignals des im Abgaskanal angeordneten Partikelsensors durchgeführt wird. Die erfindungsgemäße Vorgehensweise zeichnet sich dadurch aus, dass der Temperatur-Gradient eines Temperatur-Messsignals ermittelt wird, welches zumindest ein stromaufwärts vor dem Partikelsensor angeordneter Temperatursensor bereitstellt, dass der Temperatur-Gradient mit einem Schwellenwert verglichen wird und dass dann, wenn der Temperatur-Gradient den Schwellenwert übersteigt, die Diagnose der Komponenten als unzulässig gesperrt wird.The procedure according to the invention is based on a method for testing the permissibility of a diagnosis of a particle sensor arranged in an exhaust gas duct of an internal combustion engine, which is carried out on the basis of a particle measurement signal of the particle sensor arranged in the exhaust gas channel. The procedure according to the invention is characterized in that the temperature gradient of a temperature measurement signal is determined, which provides at least one upstream upstream of the particle sensor temperature sensor that the temperature gradient is compared with a threshold and that, if the temperature gradient exceeds the threshold, the diagnosis of the components is prohibited as inadmissible.
Mit dem erfindungsgemäßen Verfahren wird die Zulässigkeit beziehungsweise die Zuverlässigkeit einer Diagnose des Partikelsensors erhöht, der im Abgaskanal angeordnet ist.With the method according to the invention, the permissibility or the reliability of a diagnosis of the particle sensor is increased, which is arranged in the exhaust duct.
Beispielsweise wird bei dem bereits eingangs beschriebenen Verfahren gemäß der Offenlegungsschrift
Die Onboard-Diagnose des Partikelsensors beruht beispielsweise darauf, dass eine Abgastemperatur stromaufwärts bzw. im Bereich des Partikelsensors berechnet und mit der bekannten Partikelsensor-Temperatur verglichen wird. Nur dann, wenn diese Temperaturen näherungsweise übereinstimmen, wird die Funktion des Partikelsensors als in Ordnung angesehen.The onboard diagnosis of the particle sensor is based, for example, on the fact that an exhaust gas temperature upstream or in the region of the particle sensor is calculated and compared with the known particle sensor temperature. Only when these temperatures are approximately equal, the function of the particle sensor is considered to be in order.
Der Partikelsensor selbst ist zur Überwachung eines im Abgaskanal angeordneten Partikelfilters vorgesehen.The particle sensor itself is provided for monitoring a particulate filter arranged in the exhaust duct.
Es kann der Fall auftreten, beispielsweise bei einer Regenfahrt eines Kraftfahrzeugs, in welchem die Brennkraftmaschine als Antrieb eingesetzt ist, oder beispielsweise bei einer Wat-Fahrt durch Wasser, dass der Abgaskanal durch auftreffendes Wasser oder dadurch, dass Teile des Abgaskanals unter Wasser getaucht sind, plötzlich und stark abkühlt. Eine solche unvorhergesehene Abkühlung wird von dem Modell der Abgastemperatur im Allgemeinen nicht schnell genug nachgebildet, sodass nach wie vor von einem ordnungsgemäßen Partikelsensor-Messsignal ausgegangen wird, was jedoch tatsächlich nicht mehr zutrifft. Dadurch kann nicht ausgeschlossen werden, dass der Partikelsensor als fehlerhaft beurteilt wird und ein unnötiger Austausch stattfindet.It may be the case, for example in a rain drive of a motor vehicle, in which the internal combustion engine is used as a drive, or, for example, in a Wat-ride through water, that the exhaust duct by impinging water or in that parts of the exhaust duct are submerged under water, cool suddenly and strongly. Such an unforeseen cooling is generally not replicated quickly enough by the model of the exhaust gas temperature, so that a proper particle sensor measurement signal is still assumed, but this actually no longer applies. As a result, it can not be ruled out that the particle sensor is judged to be defective and an unnecessary replacement takes place.
Unter der Voraussetzung, dass die plötzliche und starke Abkühlung von zumindest einem im Abgaskanal angeordneten Temperatursensor detektiert wird, wird mit der erfindungsgemäßen Vorgehensweise die Diagnose des Partikelsensors rechtzeitig als unzulässig gesperrt, sodass unnötige Werkstattaufenthalte und Austauschkosten vermieden werden. Provided that the sudden and strong cooling of at least one temperature sensor arranged in the exhaust duct is detected, the diagnosis of the particle sensor is timely blocked as inadmissible with the procedure according to the invention, so that unnecessary workshop visits and replacement costs are avoided.
Vorteilhafte Weiterbildungen und Ausgestaltungen der erfindungsgemäßen Vorgehensweise ergeben sich aus abhängigen Ansprüchen.Advantageous developments and refinements of the procedure according to the invention will become apparent from the dependent claims.
Eine erste Ausgestaltung sieht vor, dass das Temperatursignal des nächsten stromaufwärts vor dem Partikelsensor angeordneten Temperatursensors zur Ermittlung des Temperatur-Gradienten herangezogen wird. Die Auswahl dieses Temperatursensors weist den Vorteil auf, dass dieser Temperatursensor die am nächsten zum Partikelsensor gelegene Abgastemperatur erfasst, sodass die für den Partikelsensor relevanteste Abgastemperatur zur Überprüfung der Zuverlässigkeit beziehungsweise Zulässigkeit der Diagnose herangezogen wird.A first embodiment provides that the temperature signal of the next upstream upstream of the particle sensor temperature sensor is used to determine the temperature gradient. The selection of this temperature sensor has the advantage that this temperature sensor detects the exhaust gas temperature closest to the particle sensor, so that the exhaust gas temperature which is most relevant for the particle sensor is used to check the reliability or permissibility of the diagnosis.
Eine andere Ausgestaltung sieht vor, dass bei einer Überschreitung des Schwellenwerts zusätzlich ein Taupunktsignal bereitgestellt wird, welches eine mögliche Unterschreitung des Taupunkts signalisiert. Eine Unterschreitung des Taupunkts kann insbesondere beheizte Sensoren durch auftreffende Flüssigkeits-Tröpfchen beschädigen. Deshalb sieht eine vorteilhafte Weiterbildung dieser Ausgestaltung vor, dass beim Bereitstellen des Taupunktsignals die Heizung von beheizten Sensoren abgeschaltet oder zumindest die Soll-Temperatur auf einen Wert unterhalb der Thermoschock-Temperatur des jeweiligen Sensors festgelegt wird. Dadurch kann eine Zerstörung von insbesondere keramischen Bestandteilen von Sensoren wie Lambdasensoren oder NOx-Sensoren oder des Partikelsensors verhindert werden. Die Thermoschock-Temperatur des jeweiligen Sensors ist entweder herstellerseitig angegeben oder wird experimentell ermittelt.Another embodiment provides that when the threshold value is exceeded, a dew point signal is additionally provided which signals a possible shortfall of the dew point. Falling below the dew point can damage in particular heated sensors by impinging liquid droplets. Therefore, an advantageous development of this embodiment provides that, when the dew point signal is made available, the heating of heated sensors is switched off or at least the desired temperature is set to a value below the thermal shock temperature of the respective sensor. As a result, a destruction of particular ceramic components of sensors such as lambda sensors or NOx sensors or the particle sensor can be prevented. The thermal shock temperature of the respective sensor is either specified by the manufacturer or is determined experimentally.
Die erfindungsgemäße Vorrichtung zur Durchführung des Verfahrens betrifft zunächst ein Steuergerät, das zur Durchführung des Verfahrens speziell hergerichtet ist.The device according to the invention for carrying out the method initially relates to a control device which is specially prepared for carrying out the method.
Das Steuergerät enthält vorzugsweise wenigstens einen elektrischen Speicher, in welchem die Verfahrensschritte als Steuergerätprogramm abgelegt sind.The control unit preferably contains at least one electrical memory in which the method steps are stored as a control unit program.
Das erfindungsgemäße Steuergerät-Programm sieht vor, dass alle Schritte des erfindungsgemäßen Verfahrens ausgeführt werden, wenn es in einem Steuergerät abläuft.The control unit program according to the invention provides that all steps of the method according to the invention are carried out when it runs in a control unit.
Das erfindungsgemäße Steuergerät-Programmprodukt mit einem auf einem maschinenlesbaren Träger gespeicherten Programmcode führt das erfindungsgemäße Verfahren aus, wenn das Programm in einem Steuergerät abläuft.The control unit program product according to the invention with a program code stored on a machine-readable carrier carries out the method according to the invention when the program runs in a control unit.
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert.Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description.
Figurenlistelist of figures
- Die Figur zeigt ein technisches Umfeld, in welchem ein erfindungsgemäßes Verfahren abläuft.The figure shows a technical environment in which a method according to the invention runs.
Detaillierte Beschreibung der AusführungsbeispieleDetailed description of the embodiments
Die Figur zeigt einen Abgaskanal
Das Steuergerät
Das Steuergerät
Erfindungsgemäß ist eine Bewertung zumindest eines Temperatursignals eines im Abgaskanal
Gemäß einer bevorzugten Ausgestaltung ist vorgesehen, dass das Temperatur-Messsignal te_Mess desjenigen Temperatursensors herangezogen wird, der stromaufwärts am nächsten vor dem Partikelsensor
Das Temperatur-Messsignal te_Mess des Temperatursensors
Der in der Gradienten-Bewertung
Die Taupunkt-Ermittlung
Die Heizungssteuerung
Die Heizungssteuerung
Durch das Abschalten der Heizung oder durch das Absenken der Heiztemperatur kann eine Zerstörung der beheizten, im Abgaskanal
Claims (7)
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DE102017211024B4 (en) * | 2017-06-29 | 2019-06-27 | Robert Bosch Gmbh | Method and device for activating a diagnosis of a particulate filter of an internal combustion engine |
FR3099524B1 (en) * | 2019-07-30 | 2021-07-16 | Psa Automobiles Sa | METHOD FOR CHECKING THE CHARGE OF THE PARTICLE FILTER OF MOTOR VEHICLES |
CN114658524B (en) * | 2022-03-07 | 2023-04-28 | 安徽华菱汽车有限公司 | Method, device and computer readable storage medium for monitoring particle sensor |
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DE102007014761A1 (en) | 2007-03-28 | 2008-10-02 | Robert Bosch Gmbh | Method for operating collecting particle sensors, involves providing with measuring phases, during which particle contained in exhaust gas flow is absorbed at measuring section |
DE102010003198A1 (en) | 2010-03-24 | 2011-09-29 | Robert Bosch Gmbh | Method for monitoring exhaust gas sensor in exhaust duct of internal combustion engine, particularly for monitoring resistive or capacitive particle sensor, involves determining modeled temperature of exhaust gas sensor |
EP2492481A1 (en) | 2011-02-22 | 2012-08-29 | Delphi Technologies Holding S.à.r.l. | Soot sensor functional capability monitoring |
DE102012008462A1 (en) | 2012-04-26 | 2012-10-04 | Daimler Ag | Method for operating motor vehicle, involves deactivating heating element, when sensed temperature of component of exhaust system is below predetermined threshold value, where component temperature is sensed by sensing element |
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---|---|---|---|---|
DE102006041478A1 (en) | 2006-09-05 | 2008-03-06 | Robert Bosch Gmbh | Method for determining a soot concentration in the exhaust gas of an internal combustion engine |
DE102007014761A1 (en) | 2007-03-28 | 2008-10-02 | Robert Bosch Gmbh | Method for operating collecting particle sensors, involves providing with measuring phases, during which particle contained in exhaust gas flow is absorbed at measuring section |
DE102010003198A1 (en) | 2010-03-24 | 2011-09-29 | Robert Bosch Gmbh | Method for monitoring exhaust gas sensor in exhaust duct of internal combustion engine, particularly for monitoring resistive or capacitive particle sensor, involves determining modeled temperature of exhaust gas sensor |
EP2492481A1 (en) | 2011-02-22 | 2012-08-29 | Delphi Technologies Holding S.à.r.l. | Soot sensor functional capability monitoring |
DE102012008462A1 (en) | 2012-04-26 | 2012-10-04 | Daimler Ag | Method for operating motor vehicle, involves deactivating heating element, when sensed temperature of component of exhaust system is below predetermined threshold value, where component temperature is sensed by sensing element |
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