DE102005041537A1 - Monitoring method for soot particle filter, involves measuring of temperature of exhaust gas stream in direction of flow behind soot particle filter with help of thermocouple formed at soot sensor - Google Patents
Monitoring method for soot particle filter, involves measuring of temperature of exhaust gas stream in direction of flow behind soot particle filter with help of thermocouple formed at soot sensor Download PDFInfo
- Publication number
- DE102005041537A1 DE102005041537A1 DE102005041537A DE102005041537A DE102005041537A1 DE 102005041537 A1 DE102005041537 A1 DE 102005041537A1 DE 102005041537 A DE102005041537 A DE 102005041537A DE 102005041537 A DE102005041537 A DE 102005041537A DE 102005041537 A1 DE102005041537 A1 DE 102005041537A1
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- DE
- Germany
- Prior art keywords
- soot
- particle filter
- sensor
- temperature
- soot particle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
-
- 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
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Überwachung eines in einem Abgasstrang angeordneten Rußpartikelfilters, bei dem ein in Strömungsrichtung hinter dem Rußpartikelfilter angeordneter Rußsensor in aufeinanderfolgenden Heizvorgängen wiederholt aufgeheizt wird und aus Kenngrößen des Heizvorgangs die Rußbeladung des Rußsensors bestimmt wird.The The invention relates to a method for monitoring one in an exhaust line arranged soot particle filter, at the one behind in the flow direction the soot particle filter arranged soot sensor in successive heating processes is repeatedly heated and from characteristics of the heating process, the soot loading of the soot sensor is determined.
Ein
derartiges Verfahren ist aus der
Mit dem bekannten Verfahren ist es ferner möglich, sowohl die NOx-Emissionen als auch der Gehalt an Rußpartikeln im Abgasstrom unter den zulässigen Grenzwerten zu halten. Denn bei Personenkraftwagen wird der Motor oftmals derart eingestellt, dass die NOx-Emission unterhalb des zulässigen Grenzwerts bleibt. Dafür wird ein erhöhter Gehalt von Rußpartikeln im Abgasstrom in Kauf genommen, die mit Hilfe von Rußpartikelfiltern entfernt werden müssen, damit auch der zulässige Grenzwert für den Gehalt an Rußpartikeln eingehalten wird.With It is also possible with the known method to measure both the NO x emissions as well as the content of soot particles in the exhaust gas flow below the permissible To keep limits. Because in passenger cars, the engine often adjusted so that the NOx emission below the permissible limit remains. Therefore becomes an elevated one Content of soot particles in the exhaust stream accepted with the help of soot particle filters have to be removed so that the permissible Limit for the content of soot particles is complied with.
Da es sich bei dem Rußpartikelfilter um ein abgasrelevantes Bauteil handelt, muss der Rußpartikelfilter einer fahrzeugeigenen Überwachung (on-board-diagnose = OBD) unterzogen werden. Das bedeutet, dass der Betriebszustand und die Filterwirkung des Rußpartikelfilters überwacht werden müssen. Insbesondere muss auch ein geeigneter Zeitpunkt für die Regeneration des Rußpartikelfilters bestimmt werden.There it is the soot particle filter is an exhaust gas relevant component, the soot particulate filter an on-board diagnosis (on-board diagnosis = OBD). This means that the operating state and monitors the filtering action of the particulate filter Need to become. In particular, must also be a suitable time for regeneration of the soot particle filter be determined.
Aus
der
Mit einem derartigen Temperatursensor kann ebenfalls die Funktion des Rußpartikelfilters überprüft werden. Die Rußbeladung des Rußpartikelfilters wird zunächst mit Hilfe eines Differenzdrucksensors bestimmt, der die Differenz zwischen dem Abgasdruck vor dem Rußpartikelfilter und dem Abgasdruck hinter dem Rußpartikelfilter erfasst. Ferner kann parallel dazu eine Rußbeladungsrechnung durchgeführt werden, die auf die Parameter der Motorsteuerung gestützt ist. Die Rußbeladung wird dann anhand der Rußbeladungsrechnungen und aus dem zeitlichen Verlauf des Differenzdrucks ermittelt. Durch Auswertung des zeitlichen Verlaufs des Differenzdrucks und durch Auswertung der Rußbeladungsrechnung sowie durch Plausibilitätsprüfungen lässt sich die Rußbeladung des Rußpartikelfilters mit ausreichender Genauigkeit bestimmen. Ferner kann so der optimale Zeitpunkt für die Regeneration des Rußpartikelfilters ermittelt werden. Während der Regeneration wird der im Rußpartikelfilter abgelagerte Ruß verbrannt. Durch die Messung der Temperaturen vor und hinter dem Rußpartikelfilter erhält man die durch die Verbrennung des Rußes im Rußpartikelfilter hervorgerufene Temperaturdifferenz. Ferner ist die strömende Gasmenge aus den Parametern der Motorsteuerung bekannt. Anhand der Temperaturdifferenz und der bekannten strö menden Gasmenge kann die Exothermie des Verbrennungsvorgangs während der Regeneration bestimmt werden. Die bei der Verbrennung freigesetzte Energie kann schließlich einer bestimmten Rußmenge zugeordnet werden. Wenn die Daten mit den Ergebnissen der Rußbeladungsrechnung und den Ergebnissen der Messung des Differenzdruckes übereinstimmen, kann davon ausgegangen werden, dass der Rußpartikelfilter in Ordnung ist.With Such a temperature sensor may also have the function of Soot particle filters are checked. The soot loading of the particulate filter first determined by means of a differential pressure sensor, which is the difference between the exhaust pressure before the soot particle filter and the exhaust pressure behind the soot particle filter detected. Furthermore, a soot loading calculation can be carried out in parallel, which is based on the parameters of the engine control. The soot loading is then based on the soot loading calculations and determined from the time course of the differential pressure. By Evaluation of the time course of the differential pressure and by Evaluation of the soot loading calculation as well as plausibility checks can be the soot loading of the soot particle filter determine with sufficient accuracy. Furthermore, this is the optimal time for the Regeneration of the particulate filter determined become. While the regeneration becomes that in the soot particle filter deposited soot burned. By the measurement of the temperatures in front of and behind the soot particle filter receives one caused by the combustion of the soot in the soot particle filter Temperature difference. Furthermore, the flowing gas quantity from the parameters the engine control known. Based on the temperature difference and the known flowing Gas quantity can be the exotherm of the combustion process during the Regeneration can be determined. The released during combustion Energy can finally a certain amount of soot be assigned. If the data with the results of the soot loading calculation and match the results of the differential pressure measurement, can be assumed that the soot particle filter in order is.
Ein Nachteil des bekannten Verfahrens ist, dass für seine Durchführung eine große Anzahl von Sensoren erforderlich ist. Neben dem Differenzdrucksensor sind weitere Temperatursensoren notwendig und für eine kontinuierliche Überwachung muss ein zusätzlicher Rußsensor vorhanden sein.One Disadvantage of the known method is that for its implementation a size Number of sensors is required. In addition to the differential pressure sensor Further temperature sensors are necessary and for continuous monitoring must be an additional soot sensor to be available.
Ausgehend von diesem Stand der Technik liegt der Erfindung daher die Aufgabe zugrunde, ein Verfahren anzugeben, mit dem sich ein Rußpartikelfilter zuverlässig mit geringem Aufwand überwachen lässt.outgoing From this prior art, the invention is therefore the task underlying to provide a method with which a soot particle filter reliable can be monitored with little effort.
Diese Aufgabe wird durch ein Verfahren mit den Merkmalen der unabhängigen Ansprüche gelöst. In davon abhängigen Ansprüchen sind vorteilhafte Ausgestaltungen und Weiterbildungen angegeben.These The object is achieved by a method having the features of the independent claims. In it dependent claims Advantageous embodiments and developments are given.
Bei dem Verfahren wird zwischen aufeinanderfolgenden Heizvorgängen mit Hilfe eines am Rußsensor ausgebildeten Thermoelements die Temperatur des Abgasstroms gemessen. Somit ist es möglich, die Exothermie bei der Regeneration des Rußpartikelfilters zu bestimmen, ohne dass ein separater Temperatursensor vorgesehen werden muss. Die Kombination der Funktion eines Rußsensors mit einem Temperatursensor in einem Gehäuse stellt einen wesentlichen Vorteil dar, da die Kosten für das Gehäuse und die Montage der Sensoren am Abgasstrang wesentlich größer sind, als die Kosten für die Produktion der eigentlichen Sensorelemente. Wenn nun in einem Sensor die Funktionen eines Rußsensors und eines Temperatursensors kombiniert sind, fallen die Kosten für das Gehäuse und die Montage lediglich einmal an. Der Aufwand für die Überwachung des Rußpartikelfilters verringert sich daher erheblich.In the process is aufeinan between the following heating operations using a soot sensor formed on the soot temperature sensor measured the temperature of the exhaust gas stream. Thus, it is possible to determine the exotherm in the regeneration of the particulate filter, without having to provide a separate temperature sensor. The combination of the function of a soot sensor with a temperature sensor in a housing represents a significant advantage, since the cost of the housing and the assembly of the sensors on the exhaust system are substantially greater than the cost of production of the actual sensor elements. Now, if the functions of a soot sensor and a temperature sensor are combined in a sensor, the costs for the housing and the assembly are only incurred once. The cost of monitoring the particulate filter is therefore reduced considerably.
Bei einer Ausführungsform des Verfahrens ist der Rußsensor mit einem separaten Temperaturfühler versehen. In der Regel werden Rußsensoren auf einem keramischen Substrat ausgebildet. Die dafür nötigen Bauelemente sind auf die eine Seite des keramischen Substrats aufprozessiert. Es ist daher ohne weiteres möglich, auf die gegenüberliegende Seite des Keramiksubstrats, ein Thermoelement auszubilden, das der Temperaturmessung dient.at an embodiment of the method is the soot sensor with a separate temperature sensor Mistake. In general, soot sensors are on a ceramic Substrate formed. The one for it force Components are aufprozessiert on one side of the ceramic substrate. It is therefore easily possible on the opposite side of the ceramic substrate to form a thermocouple, the temperature measurement serves.
Bei einer bevorzugten Ausführungsform wird ein im Rußsensor ausgebildetes Heizelement zur Temperaturmessung verwendet. Bei den Heizelementen handelt es sich in der Regel um Heizwiderstände mit einem positiven Temperaturkoeffizienten. Das bedeutet, dass der Widerstand des Heizelements mit zunehmender Temperatur ansteigt. Bei bekannter Kennlinie kann aus dem aktuellen Widerstand des Heizelements auf die Temperatur des Heizelements geschlossen werden.at a preferred embodiment becomes one in the soot sensor trained heating element used for temperature measurement. Both Heating elements are usually with heating resistors a positive temperature coefficient. This means that the Resistance of the heating element increases with increasing temperature. If the characteristic curve is known, the actual resistance of the heating element can be determined be closed to the temperature of the heating element.
Weitere Vorteile und Eigenschaften der Erfindung gehen aus der nachfolgenden Beschreibung hervor, in der Ausführungsbeispiele der Erfindung anhand der beigefügten Zeichnung im Einzelnen erläutert werden. Es zeigen:Further Advantages and characteristics of the invention will become apparent from the following Description forth, in the embodiments the invention with reference to the attached Detailed explanation of the drawing become. Show it:
Um
das Keramiksubstrat
Um
zu verhindern, dass Abgase durch den Rußsensor
Anhand
Der
Rußsensor
In
In
Die
während
der Stromstöße
Es
sei angemerkt, dass der Rußsensor
Im
Zeitintervall zwischen den Stromstößen
Es
sei angemerkt, dass der Heizwiderstand
- 11
- Motorsteuerungmotor control
- 22
- MotorsteuergerätEngine control unit
- 33
- Verbrennungsmotorinternal combustion engine
- 44
- Abgasleitungexhaust pipe
- 55
- RußpartikelfilterRußpartikelfilter
- 66
- Rußsensorsoot sensor
- 77
- Keramiksubstratceramic substrate
- 88th
- Heizwiderstandheating resistor
- 99
- Thermoelementthermocouple
- 1010
- Stützkörpersupport body
- 1111
- Kontaktklammercontact clip
- 1212
- Sensorleitungsensor line
- 1313
- Schutzhüllecover
- 1414
- Abgasöffnungexhaust port
- 1515
- Schutzhülseprotective sleeve
- 1616
- Gewindethread
- 1717
- GummipfropfenPlugs rubber
- 1818
- Stromverlaufcurrent profile
- 1919
- StromstoßLatching
- 2020
- Temperaturverlauftemperature curve
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102005041537A DE102005041537B4 (en) | 2005-08-31 | 2005-08-31 | Method for monitoring a soot particle filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005041537A DE102005041537B4 (en) | 2005-08-31 | 2005-08-31 | Method for monitoring a soot particle filter |
Publications (2)
Publication Number | Publication Date |
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DE102005041537A1 true DE102005041537A1 (en) | 2007-04-12 |
DE102005041537B4 DE102005041537B4 (en) | 2012-08-09 |
Family
ID=37886758
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DE102005041537A Expired - Fee Related DE102005041537B4 (en) | 2005-08-31 | 2005-08-31 | Method for monitoring a soot particle filter |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2932218A1 (en) * | 2008-06-09 | 2009-12-11 | Renault Sas | METHOD FOR DIAGNOSING FAILURES OF A FILTER OF A GAS EXHAUST LINE OF AN INTERNAL COMBUSTION ENGINE |
DE102009007126A1 (en) * | 2009-02-02 | 2010-08-12 | Continental Automotive Gmbh | Method and apparatus for measuring soot loading in exhaust systems of diesel engines |
WO2012080336A1 (en) | 2010-12-15 | 2012-06-21 | Continental Automotive Gmbh | Sensor device for particles |
DE202013010565U1 (en) * | 2013-11-22 | 2014-11-24 | Seuffer gmbH & Co. KG | Tank module for a liquid tank |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018211101A1 (en) | 2018-07-05 | 2020-01-09 | Robert Bosch Gmbh | Method and device for diagnosing an operating state of a particle filter |
Citations (4)
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DE19959870A1 (en) * | 1999-12-10 | 2001-06-21 | Heraeus Electro Nite Int | Measuring arrangement and method for monitoring the functionality of a soot filter |
DE10102491A1 (en) * | 2001-01-19 | 2002-08-08 | Walter Hofmann | Device in the exhaust system of an internal combustion engine for checking the pollution of the exhaust gas flow with soot particles |
DE10115704C1 (en) * | 2001-03-29 | 2002-09-05 | Epiq Sensor Nite N V | Housing, used for temperature or gas sensor in conjunction with diesel particle filter, has one-piece ceramic molded part with slit for receiving sensor element |
WO2005015192A1 (en) * | 2003-08-11 | 2005-02-17 | Technische Universität Graz | Soot sensor comprising heatable temperature-dependent resistance sensor elements |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US6988361B2 (en) * | 2003-10-27 | 2006-01-24 | Ford Global Technologies, Llc | Method and system for controlling simultaneous diesel particulate filter regeneration and lean NOx trap desulfation |
-
2005
- 2005-08-31 DE DE102005041537A patent/DE102005041537B4/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19959870A1 (en) * | 1999-12-10 | 2001-06-21 | Heraeus Electro Nite Int | Measuring arrangement and method for monitoring the functionality of a soot filter |
DE10102491A1 (en) * | 2001-01-19 | 2002-08-08 | Walter Hofmann | Device in the exhaust system of an internal combustion engine for checking the pollution of the exhaust gas flow with soot particles |
DE10115704C1 (en) * | 2001-03-29 | 2002-09-05 | Epiq Sensor Nite N V | Housing, used for temperature or gas sensor in conjunction with diesel particle filter, has one-piece ceramic molded part with slit for receiving sensor element |
WO2005015192A1 (en) * | 2003-08-11 | 2005-02-17 | Technische Universität Graz | Soot sensor comprising heatable temperature-dependent resistance sensor elements |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2932218A1 (en) * | 2008-06-09 | 2009-12-11 | Renault Sas | METHOD FOR DIAGNOSING FAILURES OF A FILTER OF A GAS EXHAUST LINE OF AN INTERNAL COMBUSTION ENGINE |
WO2010001029A1 (en) * | 2008-06-09 | 2010-01-07 | Renault S.A.S. | Method for diagnosing failures of an internal combustion engine exhaust line filter |
DE102009007126A1 (en) * | 2009-02-02 | 2010-08-12 | Continental Automotive Gmbh | Method and apparatus for measuring soot loading in exhaust systems of diesel engines |
US9097151B2 (en) | 2009-02-02 | 2015-08-04 | Continental Automotive Gmbh | Method and device for measuring the soot load in the exhaust gas systems of diesel engines |
WO2012080336A1 (en) | 2010-12-15 | 2012-06-21 | Continental Automotive Gmbh | Sensor device for particles |
DE102010054669A1 (en) * | 2010-12-15 | 2012-06-21 | Continental Automotive Gmbh | sensor device |
DE202013010565U1 (en) * | 2013-11-22 | 2014-11-24 | Seuffer gmbH & Co. KG | Tank module for a liquid tank |
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Publication number | Publication date |
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DE102005041537B4 (en) | 2012-08-09 |
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Owner name: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE |
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