DE102010003203A1 - Method for testing the functionality of an exhaust gas recirculation valve of an internal combustion engine - Google Patents
Method for testing the functionality of an exhaust gas recirculation valve of an internal combustion engine Download PDFInfo
- Publication number
- DE102010003203A1 DE102010003203A1 DE102010003203A DE102010003203A DE102010003203A1 DE 102010003203 A1 DE102010003203 A1 DE 102010003203A1 DE 102010003203 A DE102010003203 A DE 102010003203A DE 102010003203 A DE102010003203 A DE 102010003203A DE 102010003203 A1 DE102010003203 A1 DE 102010003203A1
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- DE
- Germany
- Prior art keywords
- signal
- exhaust gas
- gas recirculation
- recirculation valve
- functionality
- 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
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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]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/12—Other methods of operation
- F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
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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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/28—Interface circuits
- F02D2041/286—Interface circuits comprising means for signal processing
- F02D2041/288—Interface circuits comprising means for signal processing for performing a transformation into the frequency domain, e.g. Fourier transformation
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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
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D41/1408—Dithering techniques
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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
- F02M26/49—Detecting, diagnosing or indicating an abnormal function of the EGR system
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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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/1038—Sensors for intake systems for temperature or pressure
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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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/10386—Sensors for intake systems for flow rate
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Testing Of Engines (AREA)
Abstract
Die vorliegende Erfindung betrifft ein Verfahren zum Prüfen der Funktionalität eines Abgasrückführventils (13) einer Brennkraftmaschine (1), wobei die Position eines Stellgliedes (13a) des Abgasrückführventils (13) periodisch verändert wird, eine von der Bewegung des Stellglieds (13a) beeinflusste Systemgröße (LM, LD) gemessen wird und das Messsignal zum Prüfen der Funktionalität des Abgasrückführventils (13) ausgewertet wird.The present invention relates to a method for checking the functionality of an exhaust gas recirculation valve (13) of an internal combustion engine (1), the position of an actuator (13a) of the exhaust gas recirculation valve (13) being changed periodically, a system variable (13a) influenced by the movement of the actuator (13a). LM, LD) is measured and the measurement signal is evaluated to check the functionality of the exhaust gas recirculation valve (13).
Description
Die vorliegende Erfindung betrifft ein Verfahren zum Prüfen der Funktionalität eines Abgasrückführventils einer Brennkraftmaschine.The present invention relates to a method for testing the functionality of an exhaust gas recirculation valve of an internal combustion engine.
Stand der TechnikState of the art
Abgasrückführventile (AGR-Ventile) werden in Brennkraftmaschinen eingesetzt, um im Saugrohr ein Gemisch aus Frischluft und rückgeführtem Abgas zu erzeugen und so das Brennverhalten, insbesondere im Hinblick auf eine Verbrauchs- und Emissionsminimierung, zu verbessern. Beispielsweise vermindert die Abgasrückführung die NOx-Emission. Für die Abgasrückführung vom Abgasrohr zum Saugrohr wird ein kontinuierlich verstellbares Abgasrückführventil eingesetzt und dessen Öffnungsstellung geregelt. Während des Betriebs kann es jedoch aufgrund von Verschmutzung, Verrußung, Alterung usw. zu einer Störung der Funktionalität, insbesondere durch eine Abweichung der Ist-Stellung von der Soll-Stellung, kommen. Dies wirkt sich negativ auf die Verbrennung aus.Exhaust gas recirculation (EGR) valves are used in internal combustion engines to produce in the intake manifold, a mixture of fresh air and recirculated exhaust gas and thus improve the combustion behavior, in particular with regard to a consumption and emission minimization. For example, the exhaust gas recirculation reduces the NOx emission. For the exhaust gas recirculation from the exhaust pipe to the intake manifold, a continuously adjustable exhaust gas recirculation valve is used and its open position regulated. During operation, however, due to contamination, sooting, aging, etc., it may lead to a malfunction of the functionality, in particular by a deviation of the actual position from the desired position. This has a negative effect on the combustion.
Es ist daher wünschenswert, die Funktionalität eines Abgasrückführventils einfach und zuverlässig prüfen zu können.It is therefore desirable to be able to easily and reliably check the functionality of an exhaust gas recirculation valve.
Offenbarung der ErfindungDisclosure of the invention
Erfindungsgemäß wird ein Verfahren mit den Merkmalen des Patentanspruchs 1 vorgeschlagen. Vorteilhafte Ausgestaltungen sind Gegenstand der Unteransprüche sowie der nachfolgenden Beschreibung.According to the invention, a method with the features of claim 1 is proposed. Advantageous embodiments are the subject of the dependent claims and the following description.
Vorteile der ErfindungAdvantages of the invention
Die Erfindung basiert im Wesentlichen auf der Maßnahme, den Steller eines AGR-Ventils mit einem periodisch modulierten Signal zu beaufschlagen und einen davon beeinflussten Systemausgang, z. B. das Signal des Ladedruck-Sensors oder das Signal des Luftmassen-Sensors, im Frequenzbereich zu analysieren. Das Verfahren ist in weiten Betriebsbereichen des Motors, insbesondere sowohl stationär als auch dynamisch, anwendbar und kann so die Anforderung einer kontinuierlichen Diagnose erfüllen. Das vorgeschlagene Konzept kann mit ohnehin vorhandenen Sensoren und Aktoren auskommen, die serienmäßig im Fahrzeug verbaut sind, so dass keine Zusatzkosten für weitere Sensorik oder Aktorik oder Steuergerätehardware entstehen. Bei einer kontinuierlichen Durchführung des Verfahrens kann zu jedem Zeitpunkt die Funktionalität des Abgasrückführventils überprüft werden. Bei einer kleinen Modulation des Stellsignals kann das Ruß/NOx-Verhältnis näherungsweise als linear betrachtet werden, so dass das Verfahren keinen Einfluss auf die Gesamtemission nimmt. Obwohl das Verfahren somit grundsätzlich in die AGR-Regelung eingreift, findet dennoch kein nennenswerter Einfluss auf die Emission statt, was die Erfindung in der Praxis besonders gut anwendbar macht. Die Erfindung ist für Brennkraftmaschinen mit Selbst- oder Fremdzündung geeignet.The invention is essentially based on the measure to pressurize the actuator of an EGR valve with a periodically modulated signal and a system output influenced by it, for. As the signal of the boost pressure sensor or the signal of the air mass sensor to analyze in the frequency domain. The method is applicable in wide operating ranges of the engine, in particular both stationary and dynamic, and can thus meet the requirement of a continuous diagnosis. The proposed concept can get along with already existing sensors and actuators, which are installed as standard in the vehicle, so that no additional costs for other sensors or actuators or ECU hardware arise. In a continuous implementation of the method, the functionality of the exhaust gas recirculation valve can be checked at any time. With a small modulation of the control signal, the soot / NOx ratio can be considered approximately as linear, so that the method has no influence on the total emission. Although the method thus basically intervenes in the EGR control, there is nevertheless no appreciable influence on the emission, which makes the invention particularly well applicable in practice. The invention is suitable for internal combustion engines with self-ignition or spark ignition.
Als periodisches Stellsignal kann ein sinusförmiges Signal oder ein Rechtecksignal eingesetzt werden. Ein Rechtecksignal ist bei geringerer Abtastrate besser darstellbar als ein Sinussignal gleicher Frequenz. Prinzipiell ist jedoch jedes periodische Signal zur Modulation geeignet.As a periodic control signal, a sinusoidal signal or a rectangular signal can be used. A square wave signal is better reproducible at a lower sampling rate than a sine wave signal of the same frequency. In principle, however, any periodic signal is suitable for modulation.
Es bietet sich an, einen gleitenden Mittelwert (Tiefpassfilterung) des Messsignals zu berechnen und diesen Mittelwert vom Messsignal zu subtrahieren, um die Robustheit der Diagnose zu steigern.It makes sense to calculate a moving average (low-pass filtering) of the measuring signal and to subtract this mean from the measuring signal in order to increase the robustness of the diagnosis.
Zur Auswertung des Messsignals kann eine Fourieranalyse oder ein Lock-In-Verfahren dienen. Der zusätzliche Vorteil eines phasenempfindlichen Verfahrens, insbesondere eines Lock-In-Verfahrens, besteht darin, dass hiermit direkt die Kennlinie der Regelstrecke in Abhängigkeit von der Stellerposition gemessen werden kann. Zur Beurteilung der Funktionalität muss dann lediglich ein Kennliniengradient im Hinblick auf vorbestimmte Schwellwerte überwacht werden. Hierdurch lässt sich zusätzlich zu einer Schwergängigkeit des AGR-Ventils auch eine eventuell auftretende Änderung der Regelstreckenkennlinie, z. B. durch Alterung von Rückstellfedern, Versottung des Ventils, Manipulation u. ä. zuverlässig erkennen.To evaluate the measurement signal, a Fourier analysis or a lock-in method can be used. The additional advantage of a phase-sensitive method, in particular a lock-in method, is that it allows direct measurement of the characteristic curve of the controlled system as a function of the position of the actuator. In order to assess the functionality, it is then only necessary to monitor a characteristic gradient with regard to predetermined threshold values. As a result, in addition to a stiffness of the EGR valve and a possibly occurring change in the control path characteristic, z. B. by aging of return springs, sooting of the valve, manipulation u. Ä. Reliably recognize.
Eine erfindungsgemäße Recheneinheit, z. B. ein Steuergerät eines Kraftfahrzeugs, ist, insbesondere programmtechnisch, dazu eingerichtet, ein erfindungsgemäßes Verfahren durchzuführen.An arithmetic unit according to the invention, for. As a control device of a motor vehicle is, in particular programmatically, adapted to perform a method according to the invention.
Weitere Vorteile und Ausgestaltungen der Erfindung ergeben sich aus der Beschreibung und der beiliegenden Zeichnung.Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings.
Es versteht sich, dass die vorstehend genannten und die nachfolgend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination indicated, but also in other combinations or in isolation, without departing from the scope of the present invention.
Die Erfindung ist anhand von Ausführungsbeispielen in der Zeichnung schematisch dargestellt und wird im Folgenden unter Bezugnahme auf die Zeichnung ausführlich beschrieben.The invention is illustrated schematically by means of exemplary embodiments in the drawing and will be described in detail below with reference to the drawing.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Ausführungsform(en) der ErfindungEmbodiment (s) of the invention
In
In dem Ansaugrohr
Das Ansaugrohr
Im Betrieb wird durch den angetriebenen Kolben eine Kurbelwelle
Es versteht sich, dass eine Brennkraftmaschine mit Fremd- oder Selbstzündung mehr als einen Zylinder aufweisen kann, die derselben Kurbelwelle sowie demselben Abgasrohr zugeordnet sind und eine Abgasbank bilden.It is understood that an internal combustion engine with external or self-ignition may have more than one cylinder, which are assigned to the same crankshaft and the same exhaust pipe and form an exhaust bank.
In bevorzugter Ausgestaltung der Erfindung werden die Ventilklappe
Das Steuergerät
Nachfolgend wird anhand
Das Verfahren beginnt in einem optionalen Schritt
In einem Schritt
In einem im Wesentlichen gleichzeitig stattfindenden Schritt
In einem anschließenden, optionalen Schritt
Anschließend wird das Subtraktionsergebnis als neues Messsignal ausgewertet, wobei sich gemäß
Bei der Fourieranalyse gemäß
Bei dem Lock-In-Verfahren gemäß
In einem Schritt
Claims (8)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010003203A DE102010003203A1 (en) | 2010-03-24 | 2010-03-24 | Method for testing the functionality of an exhaust gas recirculation valve of an internal combustion engine |
CN201180015142.XA CN102791995B (en) | 2010-03-24 | 2011-03-15 | For checking the method for the function of the exhaust gas recirculation valve of internal-combustion engine |
RU2012145008/07A RU2560091C2 (en) | 2010-03-24 | 2011-03-15 | Test method of functionality of exhaust gas recirculation valve of internal combustion engine |
BR112012024042-0A BR112012024042B1 (en) | 2010-03-24 | 2011-03-15 | PROCESS FOR TESTING THE FUNCTIONALITY OF A COMBUSTION ENGINE EXHAUST GAS RECIRCULATION VALVE AND CALCULATION UNIT |
PCT/EP2011/053871 WO2011117108A1 (en) | 2010-03-24 | 2011-03-15 | Method for testing the functionality of an exhaust gas recirculation valve of an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010003203A DE102010003203A1 (en) | 2010-03-24 | 2010-03-24 | Method for testing the functionality of an exhaust gas recirculation valve of an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
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DE102010003203A1 true DE102010003203A1 (en) | 2011-09-29 |
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Application Number | Title | Priority Date | Filing Date |
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DE102010003203A Pending DE102010003203A1 (en) | 2010-03-24 | 2010-03-24 | Method for testing the functionality of an exhaust gas recirculation valve of an internal combustion engine |
Country Status (5)
Country | Link |
---|---|
CN (1) | CN102791995B (en) |
BR (1) | BR112012024042B1 (en) |
DE (1) | DE102010003203A1 (en) |
RU (1) | RU2560091C2 (en) |
WO (1) | WO2011117108A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MY176701A (en) * | 2016-09-07 | 2020-08-19 | Nissan Motor | Engine control method and control device |
DE102016219781A1 (en) * | 2016-10-12 | 2018-04-12 | Robert Bosch Gmbh | Method and control unit for balancing and diagnosing an exhaust gas recirculation mass flow meter |
GB2570335B (en) | 2018-01-22 | 2020-03-11 | Ford Global Tech Llc | An exhaust gas recirculation valve control method |
GB2570336B (en) | 2018-01-22 | 2020-03-04 | Ford Global Tech Llc | An exhaust gas recirculation valve diagnostic method |
CN112539121B (en) * | 2020-11-27 | 2022-03-01 | 潍柴动力股份有限公司 | Carbon deposition online detection method and detection device of EGR system and motor vehicle |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4406281C2 (en) * | 1993-03-01 | 1996-08-22 | Mitsubishi Motors Corp | Method for determining a failure of an exhaust gas recirculation device |
US5508926A (en) * | 1994-06-24 | 1996-04-16 | General Motors Corporation | Exhaust gas recirculation diagnostic |
US5996337A (en) * | 1998-02-06 | 1999-12-07 | Engelhard Corporation | Dynamic calorimetric sensor system |
DE10025133B4 (en) * | 2000-05-20 | 2012-12-13 | Volkswagen Ag | Method for checking an exhaust gas recirculation system |
WO2002101264A2 (en) * | 2001-06-13 | 2002-12-19 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Method and system for regulating the torque transmission capacity of a frictionally engaged, torque transmitting assembly |
RU2342543C2 (en) * | 2003-04-16 | 2008-12-27 | Вестпорт Павер Инк | Internal combustion engine with gas fuel injection |
JP4354283B2 (en) * | 2004-01-20 | 2009-10-28 | 本田技研工業株式会社 | Exhaust gas recirculation leak detector |
JP4487887B2 (en) * | 2005-09-02 | 2010-06-23 | トヨタ自動車株式会社 | Valve control device for internal combustion engine |
DE102008030473A1 (en) * | 2007-07-12 | 2009-01-15 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Method for detecting the tactile point of an automated clutch |
FR2919671B1 (en) * | 2007-08-03 | 2009-10-30 | Sphere Tech Europ Sarl | METHOD FOR DIAGNOSING AN INTERNAL COMBUSTION ENGINE BY EXHAUST GAS ANALYSIS AND DEVICE FOR CARRYING OUT SAID METHOD |
JP2009221992A (en) * | 2008-03-17 | 2009-10-01 | Denso Corp | Malfunction diagnosing apparatus for exhaust gas sensor |
DE102009027010A1 (en) * | 2009-06-18 | 2010-12-23 | Robert Bosch Gmbh | Method for diagnosing an actuator of a boost pressure system of an internal combustion engine |
-
2010
- 2010-03-24 DE DE102010003203A patent/DE102010003203A1/en active Pending
-
2011
- 2011-03-15 RU RU2012145008/07A patent/RU2560091C2/en active
- 2011-03-15 CN CN201180015142.XA patent/CN102791995B/en active Active
- 2011-03-15 BR BR112012024042-0A patent/BR112012024042B1/en active IP Right Grant
- 2011-03-15 WO PCT/EP2011/053871 patent/WO2011117108A1/en active Application Filing
Also Published As
Publication number | Publication date |
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RU2560091C2 (en) | 2015-08-20 |
CN102791995A (en) | 2012-11-21 |
WO2011117108A1 (en) | 2011-09-29 |
CN102791995B (en) | 2016-03-30 |
RU2012145008A (en) | 2014-05-10 |
BR112012024042B1 (en) | 2020-09-29 |
BR112012024042A2 (en) | 2016-08-30 |
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