DE102009047046A1 - Multi-tank system for filling with reducing agent for bringing into exhaust gas system of internal combustion engine, comprises two tanks, and pump unit with filter unit, which is lying between tanks in fluidic manner - Google Patents
Multi-tank system for filling with reducing agent for bringing into exhaust gas system of internal combustion engine, comprises two tanks, and pump unit with filter unit, which is lying between tanks in fluidic manner Download PDFInfo
- Publication number
- DE102009047046A1 DE102009047046A1 DE102009047046A DE102009047046A DE102009047046A1 DE 102009047046 A1 DE102009047046 A1 DE 102009047046A1 DE 102009047046 A DE102009047046 A DE 102009047046A DE 102009047046 A DE102009047046 A DE 102009047046A DE 102009047046 A1 DE102009047046 A1 DE 102009047046A1
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- Germany
- Prior art keywords
- filter
- tank
- tanks
- reducing agent
- tank system
- 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
- 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
- F01N3/36—Arrangements for supply of additional fuel
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1426—Filtration means
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Die Erfindung betrifft ein Mehrtanksystem für die Befüllung mit Reduktionsmittel zum Einbringen in ein Abgassystem einer Brennkraftmaschine, mit einem ersten Tank, mindestens einem weiteren, zweiten Tank und zwischen den Tanks liegender Umpumpeinheit mit vor- und/oder nachgeschalteter Filtereinrichtung.The invention relates to a multi-tank system for filling with reducing agent for introduction into an exhaust system of an internal combustion engine, with a first tank, at least one further, second tank and lying between the tanks Umpumpeinheit with upstream and / or downstream filter device.
Stand der TechnikState of the art
Ein derartiges Mehrtanksystem ist bekannt. Im Tanksystem wird Reduktionsmittel (AdBlue beziehungsweise Harnstofflösung) bevorratet, um es im Betrieb einer Brennkraftmaschine in deren Abgassystem zur Optimierung der Abgaswerte einzuspritzen. Da in Abhängigkeit der Platzverhältnisse im die Brennkraftmaschine aufnehmenden Motorenraum eines Fahrzeugs das Gesamtsystem zur Reduktionsmitteleinspritzung gegebenenfalls nicht zusammenhängend untergebracht werden kann, ist es bekannt, ein sogenanntes Mehrtanksystem, insbesondere Zweitanksystem, zu verwenden. Ein erster, passiver Tank liegt beabstandet zu einem zweiten, aktiven Tank, wobei aus dem aktiven Tank das Reduktionsmittel zum Einspritzen in das Abgassystem der Brennkraftmaschine brennkraftmaschinennah zur Verfügung gestellt wird. Um dieses im Bauvolumen relativ kleine System mit Reduktionsmittel zu versorgen, ist das Passivsystem vorgesehen, d. h., dieses liegt an geeigneter Stelle im Motorenraum und liefert dem Aktivsystem Nachschub über eine Verbindungsleitung in der sich eine Umpumpeinheit mit vor- und/oder nachgeschalteter Filtereinrichtung befindet. Die Filtereinrichtung sorgt dafür, dass keine unzulässigen Partikel vom Passivsystem in das Aktivsystem gelangen. Das Filtermedium der bekannten Filtereinrichtung hat jedoch aufgrund seiner Steifheit den Nachteil, dass es bei niedrigen Außentemperaturen (< –11C°) durch gefrierendes Reduktionsmittel derart beaufschlagt wird, dass beim Wiederauftauen die Gefahr besteht, dass sich Partikel des Filtermediums lösen und in die Umpumpeinheit sowie in das Aktivsystem gelangen und/oder dass das Filtermedium durch den Gefriervorgang durch hohe Druck-, Zug- und/oder Scherkräfte beschädigt wird.Such a multi-tank system is known. In the tank system, reducing agent (AdBlue or urea solution) is stored in order to inject it into the exhaust system during operation of an internal combustion engine for optimizing the exhaust gas values. Since, depending on the space conditions in the internal combustion engine receiving engine compartment of a vehicle, the entire system for reducing agent injection may not be accommodated contiguous, it is known to use a so-called multi-tank system, in particular two-tank system. A first, passive tank is spaced from a second, active tank, wherein from the active tank, the reducing agent for injection into the exhaust system of the internal combustion engine is provided close to the engine. In order to supply this relatively small system in the construction volume with reducing agent, the passive system is provided, d. h., This is located at a suitable location in the engine room and supplies the active system replenishment via a connecting line in which there is a transfer unit with upstream and / or downstream filter device. The filter device ensures that no impermissible particles pass from the passive system into the active system. Due to its stiffness, however, the filter medium of the known filter device has the disadvantage that it is acted upon by freezing reducing agent at low outside temperatures (<-11 ° C) such that, during thawing, there is a risk that particles of the filter medium will detach and be transferred to the transfer unit and into the transfer pump enter the active system and / or that the filter medium is damaged by the freezing process by high pressure, tensile and / or shear forces.
Offenbarung der ErfindungDisclosure of the invention
Dadurch, dass dem Filtermedium mindestens ein elastisches Rückstellelement zugeordnet ist, werden das Herauslösen von Partikeln aus dem Filtermedium und/oder die Beschädigung des Filtermaterials durch Gefriervorgänge vermieden. Taut das Reduktionsmittel wieder auf, so sorgt das elastische Rückstellelement dafür, dass etwaige durch das Gefrieren aufgetretene Verformungen des Filtermediums beseitigt werden, so dass das Filtermedium wieder in seine ursprüngliche Form zurückgelangt. Das Filtermedium ist vorzugsweise ein biegeschlaffes Medium, das durch das elastische Rückstellmittel in gewünschter Form gehalten wird.Characterized in that the filter medium is assigned at least one elastic return element, the leaching of particles from the filter medium and / or the damage of the filter material are avoided by freezing processes. If the reducing agent dews again, the elastic return element ensures that any deformations of the filter medium that have occurred due to freezing are eliminated so that the filter medium returns to its original shape. The filter medium is preferably a pliable medium, which is held in the desired shape by the elastic return means.
Nach einer Weiterbildung der Erfindung ist vorgesehen, dass das Filtermedium ein Kunststoffgewebe ist. Derartige Gewebe sind nachgiebig und können sich daher flexibel den Verhältnissen beim Gefriervorgang anpassen, ohne dass es zu Beschädigungen kommt.According to a development of the invention, it is provided that the filter medium is a plastic fabric. Such fabrics are compliant and can therefore adapt flexibly to the conditions during the freezing process without causing any damage.
Nach einer Weiterbildung der Erfindung ist vorgesehen, dass das Filtermedium als Filterbeutel ausgebildet ist. Der Filterbeutel wird von außen nach innen in Förderrichtung des Reduktionsmittels vom ersten, passiven Tank in den zweiten, aktiven Tank durchströmt.According to a development of the invention, it is provided that the filter medium is designed as a filter bag. The filter bag is flowed from outside to inside in the conveying direction of the reducing agent from the first, passive tank in the second, active tank.
Nach einer Weiterbildung der Erfindung ist das Rückstellelement als Federelement ausgebildet. Es weist daher Federeigenschaften auf und kann sich elastisch den Kräften beim Gefrieren anpassen.According to a development of the invention, the return element is designed as a spring element. It therefore has spring properties and can adapt elastically to the forces during freezing.
Vorteilhaft ist es, das Rückstellelement als Schraubenfeder auszubilden. Die Schraubenfeder stellt einen elastischen, dreidimensionalen Körper dar, an dem sich das Filtermedium abstützen kann oder an dem das Filtermedium befestigt ist.It is advantageous to form the return element as a helical spring. The coil spring is an elastic, three-dimensional body on which the filter medium can be supported or to which the filter medium is attached.
Es ist vorteilhaft, wenn sich das Federelement im Innern des Filterbeutels befindet und/oder mit dem Filterbeutel, diesen aufspannend, verbunden ist. Im Falle der Ausbildung des Federelements als Schraubenfeder ist diese bevorzugte im Innern des Filterbeutels angeordnet, d. h., der Filterbeutel überspannt die Schraubenfeder und wird dadurch in Form gehalten. Beim Gefriervorgang kann eine derartige Anordnung zurückweichen und nach dem Auftauen wieder in die ursprüngliche Position zurückgelangen.It is advantageous if the spring element is located in the interior of the filter bag and / or with the filter bag, this spanning, is connected. In the case of the formation of the spring element as a helical spring, this is preferably arranged in the interior of the filter bag, d. h., The filter bag spans the coil spring and is thereby held in shape. During the freezing process, such an arrangement can recede and get back to the original position after thawing.
Es ist vorteilhaft, wenn sich das Filtermedium mit Rückstellelement in einem Filtergehäuse der Filtereinrichtung befindet. Das Filtergehäuse bildet ein Aufnahmegefäß für das von der Umpumpeinheit umgepumpte Reduktionsmittel dar, d. h., das Reduktionsmittel gelangt in das Filtergehäuse und durchsetzt dabei das Filtermedium. Das Filtergehäuse hat vorzugsweise einen Zulauf und einen Ablauf, wobei zwischen diesen beiden Elementen das Filtermedium liegt.It is advantageous if the filter medium with return element is located in a filter housing of the filter device. The filter housing forms a receptacle for the reductant circulated by the pumping unit, d. h., The reducing agent enters the filter housing and passes through the filter medium. The filter housing preferably has an inlet and a drain, wherein the filter medium lies between these two elements.
Schließlich ist es vorteilhaft, wenn das Filtermedium zu mindestens einer Innenseite des Filtergehäuses einen Abstand aufweist. Demzufolge liegt das Filtermedium nicht an der Innenseite des Filtergehäuses an, sondern es besteht ein Spaltraum zwischen Filtermedium und Innenseite des Filtergehäuses, sodass das Reduktionsmittel diesen Spaltraum ausfüllen, durch das Filtermedium hindurchtreten und vom Filtermedium aus dann gefiltert abströmen kann.Finally, it is advantageous if the filter medium has a distance to at least one inside of the filter housing. Consequently, the filter medium is not on the inside of the filter housing, but there is a gap between the filter medium and the inside of the filter housing, so that the reducing agent fill this gap, pass through the filter medium and then filtered from the filter medium can flow out.
Die Zeichnungen veranschaulichen die Erfindung anhand eines Ausführungsbeispiels und zwar zeigt: The drawings illustrate the invention with reference to an embodiment and shows:
Die
Wie in der
Die
Wird mittels der Umpumpeinheit
Das Kunststoffgewebe des Filtermediums
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009047046A DE102009047046A1 (en) | 2009-11-24 | 2009-11-24 | Multi-tank system for filling with reducing agent for bringing into exhaust gas system of internal combustion engine, comprises two tanks, and pump unit with filter unit, which is lying between tanks in fluidic manner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009047046A DE102009047046A1 (en) | 2009-11-24 | 2009-11-24 | Multi-tank system for filling with reducing agent for bringing into exhaust gas system of internal combustion engine, comprises two tanks, and pump unit with filter unit, which is lying between tanks in fluidic manner |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102009047046A1 true DE102009047046A1 (en) | 2011-05-26 |
Family
ID=43901854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE102009047046A Withdrawn DE102009047046A1 (en) | 2009-11-24 | 2009-11-24 | Multi-tank system for filling with reducing agent for bringing into exhaust gas system of internal combustion engine, comprises two tanks, and pump unit with filter unit, which is lying between tanks in fluidic manner |
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DE (1) | DE102009047046A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020214869A1 (en) | 2020-11-26 | 2022-06-02 | Vitesco Technologies GmbH | Conveying device with filter element |
-
2009
- 2009-11-24 DE DE102009047046A patent/DE102009047046A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020214869A1 (en) | 2020-11-26 | 2022-06-02 | Vitesco Technologies GmbH | Conveying device with filter element |
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R012 | Request for examination validly filed | ||
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |