DE102013202142A1 - Method for performing regeneration of particulate filter in engine, involves carrying out regeneration process at switched off state of engine, so that regulation of combustion of particles is controlled by supply of fresh air - Google Patents
Method for performing regeneration of particulate filter in engine, involves carrying out regeneration process at switched off state of engine, so that regulation of combustion of particles is controlled by supply of fresh air Download PDFInfo
- Publication number
- DE102013202142A1 DE102013202142A1 DE201310202142 DE102013202142A DE102013202142A1 DE 102013202142 A1 DE102013202142 A1 DE 102013202142A1 DE 201310202142 DE201310202142 DE 201310202142 DE 102013202142 A DE102013202142 A DE 102013202142A DE 102013202142 A1 DE102013202142 A1 DE 102013202142A1
- Authority
- DE
- Germany
- Prior art keywords
- regeneration
- particulate filter
- internal combustion
- combustion engine
- fresh air
- 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.)
- Pending
Links
Images
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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation catalysts
-
- 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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
-
- 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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/0238—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 using means for regenerating the filters, e.g. by burning trapped particles for regenerating during engine standstill
-
- 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
- F01N3/033—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 in combination with other devices
- F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/30—Arrangements for supply of additional air
- F01N3/32—Arrangements for supply of additional air using air pump
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
-
- 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
- F01N2900/1402—Exhaust gas composition
-
- 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
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/16—Control of the pumps by bypassing charging air
- F02B37/168—Control of the pumps by bypassing charging air into the exhaust conduit
-
- 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
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/02—Drives of pumps; Varying pump drive gear ratio
- F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
- F02B39/10—Non-mechanical drives, e.g. fluid drives having variable gear ratio electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
-
- 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
Description
Stand der TechnikState of the art
Die Erfindung betrifft ein Verfahren zur Regeneration eines Partikelfilters im Abgaskanal einer Brennkraftmaschine durch eine Verbrennung der in dem Partikelfilter eingelagerten Partikel, wobei zum Starten der Regeneration die Temperatur des Partikelfilters auf eine Zündtemperatur erhöht wird.The invention relates to a method for the regeneration of a particulate filter in the exhaust passage of an internal combustion engine by combustion of the particulates stored in the particulate filter, wherein the temperature of the particulate filter is increased to an ignition temperature to start the regeneration.
Die Erfindung betrifft weiterhin eine Vorrichtung zur Regeneration eines Partikelfilters im Abgaskanal einer Brennkraftmaschine durch eine Verbrennung der in dem Partikelfilter eingelagerten Partikel, wobei die Vorrichtung zum Starten der Regeneration Mittel zur Erhöhung der Temperatur des Partikelfilters auf eine Zündtemperatur enthält.The invention further relates to a device for regeneration of a particulate filter in the exhaust passage of an internal combustion engine by combustion of the particulates stored in the particulate filter, wherein the device for starting the regeneration means for increasing the temperature of the particulate filter to an ignition temperature.
Bei Dieselmotoren werden aufgrund der geforderten niedrigen Emissionsgrenzwerte Abgasnachbehandlungssysteme mit Oxidationskatalysatoren und in Abgasrichtung nachgeschalteten Partikelfiltern eingesetzt. Diesel-Partikelfilter (DPF) weisen eine begrenzte Speicherfähigkeit auf und müssen zur Wiederherstellung der Reinigungswirkung in bestimmten Abständen regeneriert werden. Dies geschieht typischerweise alle 250 bis 1000 km. Bei Diesel-Partikelfiltern wird die Regeneration durch eine Erhöhung der Abgastemperatur auf typischerweise 600°C bis 650°C eingeleitet, so dass der in dem Partikelfilter eingelagerte Ruß abzubrennen beginnt. Insbesondere bei niedrigen Lasten und Drehzahlen der Brennkraftmaschine ist es bekannt, zur Erreichung der notwendigen Temperaturen innermotorische Maßnahmen vorzusehen, zum Beispiel in der Gemischaufbereitung des Motors oder durch nachmotorische Maßnahmen wie einer an dem Oxidationskatalysator verbrennenden Nacheinspritzung in den Abgaskanal. Bei ausreichend hoher Abgastemperatur wird in dem Partikelfilter eine exotherme Reaktion angestoßen, die einen Abbrand der Rußpartikel bewirkt und innerhalb einiger Minuten (z.B. 20 Minuten) den Partikelfilter regeneriert.In the case of diesel engines exhaust gas aftertreatment systems with oxidation catalysts and downstream particulate filters are used due to the required low emission limit values. Diesel particulate filters (DPF) have limited storage capacity and need to be regenerated at regular intervals to restore their cleaning performance. This typically happens every 250 to 1000 km. In diesel particulate filters, the regeneration is initiated by increasing the exhaust gas temperature to typically 600 ° C to 650 ° C, so that the soot stored in the particulate filter begins to burn off. In particular, at low loads and speeds of the internal combustion engine, it is known to provide internal engine measures to achieve the necessary temperatures, for example in the mixture preparation of the engine or by post-engine measures such as burning at the oxidation catalyst post-injection into the exhaust passage. When the exhaust gas temperature is sufficiently high, an exothermic reaction is initiated in the particulate filter which causes the soot particles to burn off and regenerates the particulate filter within a few minutes (for example 20 minutes).
Partikelfilter werden auch bei mit Benzin als Kraftstoff betriebenen Brennkraftmaschinen zur Reinigung des Abgases eingesetzt.Particulate filters are also used in gasoline fueled internal combustion engines to purify the exhaust gas.
Es ist weiterhin bekannt, bei Niedrig-Last-Zyklen die Leerlaufdrehzahl im Regenerationsbetrieb leicht zu erhöhten, um die Last und somit die Abgastemperatur anzuheben. Insgesamt führen jedoch häufiger Schwachlastbetrieb und Kurzstreckenfahrten zu langen und/oder häufigen Regenerationen des Partikelfilters und somit zu erhöhtem Ausstoß an Kohlendioxid und/oder Kraftstoffmehrverbrauch sowie zu einer erhöhten Ölverdünnung. Start-Stopp-Systeme und Hybrid-Antriebskonzepte erhöhen die Anzahl der Stopp-Phasen der Brennkraftmaschine und erschweren eine Regeneration des Partikelfilters.It is also known that at low load cycles, the idle speed in the regeneration mode is slightly increased to increase the load and thus the exhaust gas temperature. Overall, however, often low load operation and short trips lead to long and / or frequent regenerations of the particulate filter and thus to increased emissions of carbon dioxide and / or increased fuel consumption and to increased oil dilution. Start-stop systems and hybrid drive concepts increase the number of stop phases of the internal combustion engine and make regeneration of the particulate filter more difficult.
Nachteilig bei den bekannten Verfahren zur Regeneration von Partikelfiltern ist es, dass während Stopp-Phasen der Brennkraftmaschine keine Regeneration des Partikelfilters durchgeführt werden kann. A disadvantage of the known methods for the regeneration of particulate filters is that no regeneration of the particulate filter can be carried out during stop phases of the internal combustion engine.
Es ist daher Aufgabe der Erfindung, ein Verfahren bereitzustellen, welches eine verbesserte Regeneration von Partikelfiltern im Abgaskanal von Brennkraftmaschinen bei einem Betrieb mit häufigen Stopp-Phasen ermöglicht.It is therefore an object of the invention to provide a method which allows improved regeneration of particulate filters in the exhaust passage of internal combustion engines during operation with frequent stop phases.
Es ist weiterhin Aufgabe der Erfindung, eine Vorrichtung zur Durchführung des Verfahrens bereitzustellen.It is a further object of the invention to provide a device for carrying out the method.
Offenbarung der ErfindungDisclosure of the invention
Die das Verfahren betreffende Aufgabe der Erfindung wird dadurch gelöst, dass die Regeneration zumindest teilweise bei abgeschalteter Brennkraftmaschine durchgeführt wird und dass die Regelung der Verbrennung der eingelagerten Partikel bei abgeschalteter Brennkraftmaschine durch eine geregelt zugeführte Frischluftmenge ohne zusätzliche Aufheizmaßnahmen erfolgt. Das Verfahren sieht vor, dass zum Starten der Regeneration die Temperatur vor dem Partikelfilter in einen Bereich von etwa 600°C erhöht wird. Dies kann mittels bekannter motorischer Maßnahmen erfolgen. Nach dem Starten der Regeneration wird diese bei laufender Brennkraftmaschine wie bekannt fortgeführt. Erfindungsgemäß ist vorgesehen, dass bei laufender Regeneration und einem Stopp der Brennkraftmaschine, beispielhaft bei einem Halt an einer Ampel mit Abschaltung der Brennkraftmaschine durch ein Start-Stopp-System, die Regeneration durch kontrollierte Zufuhr von Frischluft in den Partikelfilter fortgeführt wird. Die Mengenkontrolle der Frischluft kann dabei über eine Temperaturmessung an dem Partikelfilter oder in dessen Nähe oder über ein in den Unteransprüchen dargelegtes Verfahren erfolgen. Das erfindungsgemäße Verfahren ist auch bei Hybridantrieben während des Stillstands der Brennkraftmaschine vorteilhaft einsetzbar. Insgesamt kann durch das erfindungsgemäße Verfahren eine energieeffiziente und schnelle Regeneration des Partikelfilters erreicht werden, da kein zusätzlicher Kraftstoff benötigt wird und Stillstandphasen der Brennkraftmaschine zur Regeneration ausgenutzt werden können. Durch das erfindungsgemäße Verfahren ist eine vollständige Regeneration eines Partikelfilters in etwa 5 Minuten möglich.The object of the invention relating to the method is achieved in that the regeneration is carried out at least partially when the internal combustion engine is switched off and that the control of the combustion of the stored particles with the internal combustion engine switched off takes place by means of a controlled supply of fresh air without additional heating measures. The method provides that the temperature before the particle filter is increased to a range of about 600 ° C to start the regeneration. This can be done by means of known motor measures. After starting the regeneration, this is continued as known while the internal combustion engine is running. According to the invention, the regeneration is continued by controlled supply of fresh air into the particle filter during ongoing regeneration and a stop of the internal combustion engine, for example at a stop at a traffic light with shutdown of the internal combustion engine by a start-stop system. The quantity control of the fresh air can take place via a temperature measurement on the particle filter or in its vicinity or via a method set forth in the dependent claims. The inventive method can also be used advantageously in hybrid drives during standstill of the internal combustion engine. Overall, an energy-efficient and rapid regeneration of the particulate filter can be achieved by the method according to the invention, since no additional fuel is needed and standstill phases of the internal combustion engine can be utilized for regeneration. The inventive method a complete regeneration of a particulate filter in about 5 minutes is possible.
In einer vorteilhaften Ausprägung des Verfahrens ist vorgesehen, dass zum Starten der Regeneration bei stehender oder stark gedrosselt laufender Brennkraftmaschine die Aufheizung des Partikelfilters durch eine externe Wärmezufuhr bei kontrollierter Frischluftzuführung mit geringem Massenstrom erfolgt. Bei dem geringen Massenstrom im Bereich von 1 bis 10 kg/h kann mittels der zugeführten Frischluft die Regeneration gestartet werden und das Zünden der Regeneration kann durch eine Abnahme der Sauerstoff-Konzentration nach dem Partikelfilter erkannt werden.In an advantageous embodiment of the method, it is provided that, for starting the regeneration when the internal combustion engine is stationary or severely throttled, the heating of the engine is started Particulate filter by an external heat supply with controlled fresh air supply with low mass flow. At the low mass flow in the range of 1 to 10 kg / h regeneration can be started by means of the fresh air supplied and the ignition of the regeneration can be detected by a decrease in the oxygen concentration after the particulate filter.
Eine schnelle und zuverlässige Regeneration des Partikelfilters wird erreicht, indem während der Regeneration bei abgeschalteter Brennkraftmaschine ein Massenstrom der dem Partikelfilter zugeführten Frischluft in einem Bereich von 0,5kg/h bis 20kg/h, vorzugsweise in einem Bereich von 1,0kg/h bis 10kg/h, eingestellt wird. In einem solchen Betriebsbereich verhält sich der Partikelfilter wie ein Festbettreaktor. Sauerstoff diffundiert von Ein- und Auslasskanal an die Reaktionsfront, welche, in Richtung des Abgas-Stroms, von vorne nach hinten durch den Partikelfilter wandert. Hierbei ist die Regeneration selbsterhaltend und besonders effektiv. A fast and reliable regeneration of the particulate filter is achieved by a mass flow of the fresh air supplied to the particulate filter in a range of 0.5kg / h to 20kg / h, preferably in a range of 1.0kg / h to 10kg, during regeneration with the engine off / h, is set. In such an operating range, the particulate filter behaves like a fixed bed reactor. Oxygen diffuses from the inlet and outlet channel to the reaction front, which, in the direction of the exhaust gas flow, travels from front to back through the particle filter. Here, the regeneration is self-sustaining and particularly effective.
Wird während der Regeneration bei abgeschalteter Brennkraftmaschine die Regelung der zugeführten Frischluftmenge an Hand eines in dem Abgaskanal nach dem Partikelfilter bestimmten Sauerstoffgehalts des Verbrennungsabgases durchgeführt, kann der Abbrand der Partikel bei besonders geeigneten Bedingungen erfolgen. Der Sauerstoffgehalt kann mittels einer dem Partikelfilter nachgeschalteten Lambdasonde erfolgen. Aufgrund des geringen Frischluftmassenstroms und des hohen Sauerstoff-Verbrauchs der Regeneration kann die Überwachung sehr genau und mit hoher Signalgüte erfolgen.If, during regeneration when the internal combustion engine is switched off, the regulation of the supplied fresh air quantity is carried out by means of an oxygen content of the combustion exhaust gas determined in the exhaust duct after the particle filter, the combustion of the particles can take place under particularly suitable conditions. The oxygen content can be effected by means of a lambda probe connected downstream of the particle filter. Due to the low fresh air mass flow and the high oxygen consumption of the regeneration monitoring can be done very accurately and with high signal quality.
In einer Ausprägung des Verfahrens ist vorgesehen, dass der Beginn und das Ende der Regeneration an Hand der Differenz des Sauerstoffgehalts vor und nach dem Partikelfilter bestimmt wird. Dies erfordert keine zusätzlichen Einrichtungen, da die dem Partikelfilter nachgeschaltete Lambdasonde bereits vorhanden ist, da sie unter anderem zur Regelung der Regeneration verwendet wird.In one embodiment of the method, it is provided that the beginning and the end of the regeneration are determined based on the difference between the oxygen content before and after the particle filter. This requires no additional facilities, as the particle filter downstream lambda probe is already present, since it is used, inter alia, to control the regeneration.
In einer Weiterführung des Verfahrens ist vorgesehen, dass aus dem zugeführten Frischluftmassenstrom und der Dauer der Regeneration die verbrannte Partikelmenge bestimmt wird.In a continuation of the method, it is provided that the burned particle quantity is determined from the supplied fresh air mass flow and the duration of the regeneration.
Eine genauere Bestimmung der verbrannten Partikelmenge, und damit der Restbeladung nach Regeneration, ist erreichbar, indem zusätzlich die Differenz des Sauerstoffgehalts vor und nach dem Partikelfilter zur Bestimmung der verbrannten Partikelmenge berücksichtigt wird. A more accurate determination of the amount of burned particulate, and thus the residual load after regeneration, is achievable by additionally taking into account the difference in oxygen content before and after the particulate filter for determining the amount of particulate matter burned.
Zur Bereitstellung der Frischluft ist es vorgesehen, dass während der Regeneration bei abgeschalteter Brennkraftmaschine die Frischluft durch einen externen Luftverdichter oder über einen elektrischen Turbolader oder in einem Schleppbetrieb der Brennkraftmaschine dem Partikelfilter zugeführt wird. Hierdurch ist nur ein geringer zusätzlicher Energieaufwand erforderlich. To provide the fresh air, it is provided that during regeneration when the internal combustion engine is switched off, the fresh air is supplied to the particle filter through an external air compressor or via an electric turbocharger or in a drag operation of the internal combustion engine. As a result, only a small amount of additional energy is required.
Die die Vorrichtung betreffende Aufgabe der Erfindung wird dadurch gelöst, dass die Brennkraftmaschine während der Regeneration abschaltbar ist, dass die Vorrichtung Mittel zur geregelten Zuführung von Frischluft zu dem Partikelfilter während der Regeneration des Partikelfilters enthält und dass die Vorrichtung zumindest eine nach dem Partikelfilter vorgesehene Lambdasonde zur Bestimmung des Sauerstoffgehalts des Verbrennungsabgases zur Regelung des dem Partikelfilter zugeführten Frischluftmassenstroms enthält. Die Vorrichtung enthält nach dem Stand der Technik vorhandene Mittel zur Aufheizung des Abgases der Brennkraftmaschine in einen Bereich über etwa 600°C, die zum Start der Regeneration des Partikelfilters benutzt werden. Über die erfindungsgemäße zusätzliche Frischluftzuführung vor dem Partikelfilter wird bei abgeschalteter Brennkraftmaschine derart Frischluft eindosiert, dass die Regeneration weitergeführt wird. Es muss kein zusätzlicher Kraftstoff zudosiert werden. Mittels der im Abgasstrom nach dem Partikelfilter angeordneten Lambdasonde kann über den verbleibenden Sauerstoffgehalt die Verbrennung der Partikel verfolgt werden.The object of the invention relating to the device is achieved in that the internal combustion engine can be switched off during regeneration, that the device contains means for regulated supply of fresh air to the particle filter during regeneration of the particle filter and that the device has at least one lambda probe provided downstream of the particle filter Determining the oxygen content of the combustion exhaust gas for controlling the fresh air mass flow supplied to the particulate filter. The apparatus includes prior art means for heating the exhaust gas of the internal combustion engine to within about 600 ° C used to start the regeneration of the particulate filter. About the inventive additional fresh air supply in front of the particulate filter fresh air is metered in such a way that the regeneration is continued when the internal combustion engine. There is no need to add additional fuel. By means of the lambda probe arranged in the exhaust gas stream downstream of the particle filter, the combustion of the particles can be monitored via the remaining oxygen content.
Die erfindungsgemäße Vorrichtung ist besonders für Anordnungen geeignet, in denen die Brennkraftmaschine als Dieselmotor ausgebildet ist. The device according to the invention is particularly suitable for arrangements in which the internal combustion engine is designed as a diesel engine.
Das Verfahren und die Vorrichtung sind besonders geeignet zur Regeneration eines Partikelfilters im Abgaskanal eines Kraftfahrzeugs mit Hybridantrieb bestehend aus einer Brennkraftmaschine und einem Elektromotor. Bei dem Hybridantrieb kann über die Betriebsstrategie unter geeigneten Bedingungen die Brennkraftmaschine bei der Regeneration abgeschaltet werden und der Elektroantrieb genutzt werden. The method and the device are particularly suitable for the regeneration of a particulate filter in the exhaust passage of a motor vehicle with hybrid drive consisting of an internal combustion engine and an electric motor. In the case of the hybrid drive, the internal combustion engine can be switched off during regeneration and the electric drive can be used via the operating strategy under suitable conditions.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Die Erfindung wird im Folgenden anhand eines in den Figuren dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:The invention will be explained in more detail below with reference to an embodiment shown in FIGS. Show it:
Die Simulation zeigt, dass bei einer Beladung des Partikelfilters
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201310202142 DE102013202142A1 (en) | 2013-02-08 | 2013-02-08 | Method for performing regeneration of particulate filter in engine, involves carrying out regeneration process at switched off state of engine, so that regulation of combustion of particles is controlled by supply of fresh air |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201310202142 DE102013202142A1 (en) | 2013-02-08 | 2013-02-08 | Method for performing regeneration of particulate filter in engine, involves carrying out regeneration process at switched off state of engine, so that regulation of combustion of particles is controlled by supply of fresh air |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102013202142A1 true DE102013202142A1 (en) | 2014-08-14 |
Family
ID=51226243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201310202142 Pending DE102013202142A1 (en) | 2013-02-08 | 2013-02-08 | Method for performing regeneration of particulate filter in engine, involves carrying out regeneration process at switched off state of engine, so that regulation of combustion of particles is controlled by supply of fresh air |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102013202142A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017085366A1 (en) * | 2015-11-19 | 2017-05-26 | Peugeot Citroen Automobiles Sa | Device for the regeneration of a particle filter |
DE102016207667A1 (en) * | 2016-05-03 | 2017-11-09 | Volkswagen Aktiengesellschaft | Method and device for the regeneration of a particulate filter in a motor vehicle with hybrid drive |
DE102016120938A1 (en) * | 2016-11-03 | 2018-05-03 | Volkswagen Aktiengesellschaft | Method and device for the regeneration of a particulate filter in a motor vehicle with hybrid drive |
DE102017205856A1 (en) | 2017-04-06 | 2018-06-21 | Audi Ag | Method for operating a particle filter |
DE102017211676A1 (en) * | 2017-07-07 | 2019-01-10 | Bayerische Motoren Werke Aktiengesellschaft | Method for optimizing an exhaust aftertreatment system for a hybrid vehicle |
US10246078B2 (en) | 2016-09-29 | 2019-04-02 | Audi Ag | Time-optimized particle filter in hybrid vehicles |
FR3122214A1 (en) * | 2021-04-26 | 2022-10-28 | Renault S.A.S | Method for controlling a hybrid powertrain for regenerating a particulate filter by modulating the intake air flow |
-
2013
- 2013-02-08 DE DE201310202142 patent/DE102013202142A1/en active Pending
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3044040A1 (en) * | 2015-11-19 | 2017-05-26 | Peugeot Citroen Automobiles Sa | DEVICE FOR REGENERATING A PARTICLE FILTER |
WO2017085366A1 (en) * | 2015-11-19 | 2017-05-26 | Peugeot Citroen Automobiles Sa | Device for the regeneration of a particle filter |
DE102016207667A1 (en) * | 2016-05-03 | 2017-11-09 | Volkswagen Aktiengesellschaft | Method and device for the regeneration of a particulate filter in a motor vehicle with hybrid drive |
US10246078B2 (en) | 2016-09-29 | 2019-04-02 | Audi Ag | Time-optimized particle filter in hybrid vehicles |
RU2749608C2 (en) * | 2016-11-03 | 2021-06-16 | Фольксваген Аг | Method and device for restoring the particulate filter in a car with a hybrid drive |
WO2018082986A1 (en) * | 2016-11-03 | 2018-05-11 | Volkswagen Ag | Method and device for regenerating a particle filter in a motor vehicle with a hybrid drive |
CN109923293A (en) * | 2016-11-03 | 2019-06-21 | 大众汽车有限公司 | Regeneration method and equipment are carried out to particulate filter in the motor vehicle with hybrid drive |
DE102016120938A1 (en) * | 2016-11-03 | 2018-05-03 | Volkswagen Aktiengesellschaft | Method and device for the regeneration of a particulate filter in a motor vehicle with hybrid drive |
US11306635B2 (en) | 2016-11-03 | 2022-04-19 | Volkswagen Aktiengesellschaft | Method and device for regenerating a particulate filter in a motor vehicle with a hybrid drive |
CN109923293B (en) * | 2016-11-03 | 2022-04-19 | 大众汽车有限公司 | Method and device for regenerating a particle filter in a motor vehicle having a hybrid drive |
DE102017205856A1 (en) | 2017-04-06 | 2018-06-21 | Audi Ag | Method for operating a particle filter |
DE102017211676A1 (en) * | 2017-07-07 | 2019-01-10 | Bayerische Motoren Werke Aktiengesellschaft | Method for optimizing an exhaust aftertreatment system for a hybrid vehicle |
FR3122214A1 (en) * | 2021-04-26 | 2022-10-28 | Renault S.A.S | Method for controlling a hybrid powertrain for regenerating a particulate filter by modulating the intake air flow |
EP4083395A1 (en) * | 2021-04-26 | 2022-11-02 | Renault s.a.s | Method for controlling a hybrid power train for regenerating a particle filter by modulation of the air flow admitted |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102013202142A1 (en) | Method for performing regeneration of particulate filter in engine, involves carrying out regeneration process at switched off state of engine, so that regulation of combustion of particles is controlled by supply of fresh air | |
DE102014105210B4 (en) | System and method for cleaning exhaust gas | |
EP2788598B1 (en) | Method and device for operating an internal combustion engine comprising an exhaust gas cleaning unit | |
WO2002038934A1 (en) | Method and device for the control of an exhaust treatment system | |
DE102013003701A1 (en) | Method for controlling regeneration of particulate filter, involves setting air ratio for adjusting supply of hydrocarbon during regeneration of particulate filter, by which conversion of nitrogen oxides is takes place | |
DE112013003053T5 (en) | Filter regeneration using filter temperature modulation | |
DE102015111158B4 (en) | Engine system and method for controlling flow of exhaust gas | |
WO2017063987A1 (en) | Exhaust gas treatment for an internal combustion engine | |
DE102014111741A1 (en) | Emission control system for a vehicle | |
WO2013068370A1 (en) | Method and system for an exhaust gas particulate filter | |
DE60002652T2 (en) | Control method of a particle filter and control method of an internal combustion engine | |
DE102007010189A1 (en) | Particle-filter method for controlling regeneration of a particle filter in an internal combustion engine's exhaust gas system controls burn-up of particles in a particle filter | |
DE102017117331B4 (en) | Method for controlling, detecting and cleaning diesel exhaust fluid injector deposits | |
DE102011006920A1 (en) | Method for controlling regeneration of diesel particulate filter in exhaust gas passage of diesel engine of vehicle, involves carrying out regeneration process in extended regeneration phase without utilizing post-injections | |
DE102013222311A1 (en) | System and method for particulate filter regeneration | |
EP1584809A1 (en) | Method and apparatus for regeneration of an exhaust gas after-treatment device | |
EP1930572A2 (en) | Method and device for operating an exhaust gas after-treatment system | |
EP2294292B1 (en) | Method and device for operating an exhaust gas after-treatment system | |
DE112006002021T5 (en) | emission control device | |
DE102016121798A1 (en) | MOTOR CONTROL FOR THE EFFECTIVE EVALUATION OF DIESEL PARTICLES FILTERS | |
DE102006033567B4 (en) | Method for determining the triggering point in time for triggering the regeneration process for regenerating a particle filter | |
DE102009046151A1 (en) | Method for limiting temperature of particulate filter in exhaust gas duct of diesel engine during basic mode of operation of engine, involves switching particulate filter from basic mode of operation to regeneration mode of operation | |
DE102014115431A1 (en) | Control of regeneration in a diesel aftertreatment system | |
DE102018005836B4 (en) | Control system for an engine, engine, control method and computer program product | |
DE102010006728B4 (en) | Device and method for testing exhaust gas cleaning systems, computer program and computer program product |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R012 | Request for examination validly filed |