DE102009045721A1 - Tank for storing liquid reducing agent e.g. aqueous urea solution for exhaust gas aftertreating system of internal-combustion engine in motor vehicle, has return pipe and suction pipe arranged within heating device into tank - Google Patents
Tank for storing liquid reducing agent e.g. aqueous urea solution for exhaust gas aftertreating system of internal-combustion engine in motor vehicle, has return pipe and suction pipe arranged within heating device into tank Download PDFInfo
- Publication number
- DE102009045721A1 DE102009045721A1 DE102009045721A DE102009045721A DE102009045721A1 DE 102009045721 A1 DE102009045721 A1 DE 102009045721A1 DE 102009045721 A DE102009045721 A DE 102009045721A DE 102009045721 A DE102009045721 A DE 102009045721A DE 102009045721 A1 DE102009045721 A1 DE 102009045721A1
- Authority
- DE
- Germany
- Prior art keywords
- tank
- reducing agent
- heating device
- feed pump
- liquid reducing
- 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
- 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
- F01N3/20—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 specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03328—Arrangements or special measures related to fuel tanks or fuel handling
- B60K2015/03427—Arrangements or special measures related to fuel tanks or fuel handling for heating fuel, e.g. to avoiding freezing
-
- 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
- F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
-
- 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
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Die Erfindung betrifft einen Tank für ein flüssiges Reduktionsmittel, insbesondere für eine Harnstofflösung, zur Reduktion von Stickoxiden in einer Abgasnachbehandlungseinrichtung einer Brennkraftmaschine. Der Tank umfasst dabei eine Förderpumpe zum Absaugen des flüssigen Reduktionsmittels über eine Saugleitung aus dem Tank, eine Rücklaufleitung der Förderpumpe, um überschüssiges Reduktionsmittel wieder in den Tank zurückzuführen, und eine Heizvorrichtung für das flüssige Reduktionsmittel.The invention relates to a tank for a liquid reducing agent, in particular for a urea solution, for the reduction of nitrogen oxides in an exhaust aftertreatment device of an internal combustion engine. The tank in this case comprises a feed pump for sucking off the liquid reducing agent via a suction line from the tank, a return line of the feed pump to return excess reducing agent back into the tank, and a heating device for the liquid reducing agent.
Stand der TechnikState of the art
Mit sogenannten SCR-Systemen (Selective Catalytic Reduction) wird in Kraftfahrzeugen ein flüssiges Reduktionsmittel (z. B. Harnstoff-Wasser Lösung, sog. AdBlue) bei Bedarf in den Abgasstrang einer Brennkraftmaschine eingedüst, um eine katalytische Reduktion von Stickoxiden in einem SCR-Katalysator zu ermöglichen. Dabei zerfällt im Abgas der Harnstoff zu Ammoniak (NH3), das mit den Stickoxiden (NOx) des Abgases reagiert und diese in unschädliches Wasser (H2O) und Stickstoff (N2) umwandelt. Die Harnstoff-Wasser-Lösung wird dabei in einem separaten Tank bevorratet, der zu jeder Zeit die flüssige Lösung dem SCR-System zur Verfügung stellen muss. Dieses Verfahren ist aus dem Stand der Technik bekannt.With so-called SCR systems (Selective Catalytic Reduction), a liquid reducing agent (eg urea-water solution, so-called AdBlue) is injected into the exhaust gas line of an internal combustion engine when needed in order to achieve a catalytic reduction of nitrogen oxides in an SCR catalytic converter to enable. In the exhaust gas, the urea decomposes into ammonia (NH 3 ), which reacts with the nitrogen oxides (NO x ) of the exhaust gas and converts them into harmless water (H 2 O) and nitrogen (N 2 ). The urea-water solution is stored in a separate tank, which must provide the liquid solution to the SCR system at all times. This method is known from the prior art.
So sind aus der
Um zu verhindern, dass das flüssige Reduktionsmittel bei tiefen Außentemperaturen Frost einfriert, sind aus der
Nachteilig ist dabei, dass nicht die gesamte Menge an bevorratetem Reduktionsmittel dem SCR-System zur Verfügung steht und es bei großer Kälte trotzdem vereinzelt zu Funktionsstörungen durch gefrierendes Reduktionsmittel kommen kann. Zudem sind die Vorrichtungen teilweise relativ aufwändig aufgebaut und benötigen viel Bauraum.The disadvantage here is that not the entire amount of stored Reduktionsmittel the SCR system is available and it can still come isolated in large cold dysfunction due to freezing reducing agent. In addition, the devices are sometimes relatively complex and require a lot of space.
Offenbarung der ErfindungDisclosure of the invention
Erfindungsgemäß wird vorgeschlagen, dass die Rücklaufleitung und/oder die Saugleitung der Förderpumpe in unmittelbarer Nähe der Heizvorrichtung in den Tank mündet. Unter der unmittelbaren Nähe wird dabei zwischen der Mündung der Rücklaufleitung und/oder die Saugleitung einerseits sowie der Heizvorrichtung andererseits ein Abstand von kleiner 3 cm, bevorzugt kleiner 2 cm, verstanden. Dadurch wird sichergestellt, dass die Mündungen der Saug- und der Rückführleitung der Förderpumpe in einem heizbaren Bereich des Tanks enden, wo ein Einfrieren des Reduktionsmittels bei Frost ausgeschlossen ist. Damit ist insbesondere die Blockierung des Pumpenrücklaufs unterbunden.The invention proposes that the return line and / or the suction line of the feed pump in the immediate vicinity of the heater opens into the tank. Under the immediate vicinity is understood between the mouth of the return line and / or the suction line on the one hand and the heater on the other hand, a distance of less than 3 cm, preferably less than 2 cm. This ensures that the mouths of the suction and the return line of the feed pump in a heated area of the tank end, where a freezing of the reducing agent is excluded in frost. This is in particular the blocking of the pump return prevented.
Für die Erfindung wichtige Merkmale finden sich ferner in der nachfolgenden Beschreibung und in der Zeichnung, wobei die Merkmale sowohl in Alleinstellung als auch in unterschiedlichen Kombinationen für die Erfindung wichtig sein können, ohne dass hierauf jeweils explizit hingewiesen wird. Vorteilhafte Weiterbildungen finden sich in den Unteransprüchen.Features which are important for the invention can also be found in the following description and in the drawing, wherein the features, both alone and in different combinations, can be important for the invention without any explicit reference being made thereto. Advantageous developments can be found in the subclaims.
Vorteilhaft ist dabei, dass die Förderpumpe an dem Tankboden angeordnet ist. Unter der Voraussetzung, dass die Mündung der Saugleitung ebenfalls im Bereich des Tankbodens angeordnet ist, ergibt sich damit die Möglichkeit, das gesamte im Tank befindliche Reduktionsmittel durch die Förderpumpe abzusaugen. Eine am Boden des Tanks integrierte Wanne an der Mündung der Saugleitung kann dies noch vorteilhaft unterstützen, indem hier das flüssige Reduktionsmittel gesammelt wird. Damit wird das nutzbare Volumen an Reduktionsmittel bei gleichbleibenden Volumen des Tanks erhöht und somit die Tankintervalle verlängert.It is advantageous that the feed pump is arranged on the tank bottom. Provided that the mouth of the suction line is likewise arranged in the region of the tank bottom, this results in the possibility of sucking off the entire reducing agent in the tank through the feed pump. An integrated at the bottom of the tank trough at the mouth of the suction line can support this advantageous yet, here by the liquid reducing agent is collected. This increases the usable volume of reducing agent while keeping the volume of the tank constant and thus extends the tank intervals.
Ferner ist vorteilhaft, dass die Förderpumpe außen an dem Tankboden angeordnet ist. Dies erleichtert eine Montage der Förderpumpe und macht dadurch die Vorrichtung kostengünstig.Furthermore, it is advantageous that the feed pump is arranged on the outside of the tank bottom. This facilitates assembly of the feed pump and thereby makes the device inexpensive.
In einer vorteilhaften Variante der Erfindung ist es möglich, dass die Förderpumpe in einer Aussparung am Tank angeordnet ist. Dabei ist die Aussparung bevorzugt zum Innern des Tanks ausgebildet. Die Mündung der Saugleitung, sowie die Mündung der Rückführleitung können dabei in einem seitlichen Bereich der Aussparung angeordnet sein. Dies macht den Tank zu einer sehr kompakten Einheit, die besonders platzsparend in das Frontend des Fahrzeugs eingebaut werden kann. Das Volumen des Tanks wird dabei nicht wesentlich beeinflusst.In an advantageous variant of the invention, it is possible that the feed pump is arranged in a recess on the tank. In this case, the recess is preferably formed to the interior of the tank. The mouth of the suction line, as well as the mouth of the return line can be arranged in a lateral region of the recess. This makes the tank a very compact unit that can be installed in the front end of the vehicle to save space. The volume of the tank is not significantly affected.
Außerdem ist vorteilhaft, dass die Heizvorrichtung im Innern des Tanks, insbesondere im Bereich des Tankbodens, angeordnet ist. Damit wird erreicht, dass die Heizvorrichtung und die Mündungen der Saugleitung und Rückführleitung, sowie die Förderpumpe selbst, im Bereich des Tankbodens angeordnet sind. Dies führt automatisch beim Heizen zu einer guten Zirkulation des Reduktionsmittels im Tank, was ein Einfrieren zumindest eines Teils des Reduktionsmittels zumindest verlängert.Moreover, it is advantageous that the heating device is arranged in the interior of the tank, in particular in the region of the tank bottom. This will be achieved in that the heating device and the mouths of the suction line and return line, and the feed pump itself, are arranged in the region of the tank bottom. This automatically leads to a good circulation of the reducing agent in the tank during heating, which at least extends the freezing of at least part of the reducing agent.
Nachfolgend werden anhand der Figuren Ausführungsbeispiele der Erfindung beispielhaft erläutert. Es zeigen:Hereinafter, exemplary embodiments of the invention will be explained by way of example with reference to FIGS. Show it:
Detaillierte BeschreibungDetailed description
In
Die in
Die Förderpumpe
The
Der Anschluss
Die Funktion der Ausführungsform von
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102006027487 A1 [0003, 0004] DE 102006027487 A1 [0003, 0004]
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009045721A DE102009045721A1 (en) | 2009-10-15 | 2009-10-15 | Tank for storing liquid reducing agent e.g. aqueous urea solution for exhaust gas aftertreating system of internal-combustion engine in motor vehicle, has return pipe and suction pipe arranged within heating device into tank |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009045721A DE102009045721A1 (en) | 2009-10-15 | 2009-10-15 | Tank for storing liquid reducing agent e.g. aqueous urea solution for exhaust gas aftertreating system of internal-combustion engine in motor vehicle, has return pipe and suction pipe arranged within heating device into tank |
Publications (1)
Publication Number | Publication Date |
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DE102009045721A1 true DE102009045721A1 (en) | 2011-04-21 |
Family
ID=43798682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE102009045721A Withdrawn DE102009045721A1 (en) | 2009-10-15 | 2009-10-15 | Tank for storing liquid reducing agent e.g. aqueous urea solution for exhaust gas aftertreating system of internal-combustion engine in motor vehicle, has return pipe and suction pipe arranged within heating device into tank |
Country Status (1)
Country | Link |
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DE (1) | DE102009045721A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3038592A1 (en) * | 2015-07-10 | 2017-01-13 | Coutier Moulage Gen Ind | LIQUID TRANSFER DEVICE AND TANK ASSEMBLY COMPRISING SUCH A TRANSFER DEVICE |
CN107923284A (en) * | 2016-03-02 | 2018-04-17 | 日立建机株式会社 | Engineering machinery |
US9957862B2 (en) | 2014-04-03 | 2018-05-01 | Robert Bosch Gmbh | Secondary heating device for diesel exhaust fluid tank |
DE102017201140A1 (en) | 2017-01-25 | 2018-07-26 | Robert Bosch Gmbh | Filter arrangement for a reducing agent storage tank or a functional unit |
DE102017201124A1 (en) | 2017-01-25 | 2018-07-26 | Robert Bosch Gmbh | Delivery module for a dosing system for dosing a reducing agent in the exhaust system of a motor vehicle and dosing |
IT201900018572A1 (en) * | 2019-10-11 | 2021-04-11 | Magneti Marelli Spa | LIQUID FEED UNIT ON BOARD VEHICLE AND LIQUID FEED ASSEMBLY ON BOARD VEHICLE |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006027487A1 (en) | 2005-09-12 | 2007-03-15 | Robert Bosch Gmbh | Vehicle tank for a liquid reducing agent, in particular for a urea solution |
-
2009
- 2009-10-15 DE DE102009045721A patent/DE102009045721A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006027487A1 (en) | 2005-09-12 | 2007-03-15 | Robert Bosch Gmbh | Vehicle tank for a liquid reducing agent, in particular for a urea solution |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9957862B2 (en) | 2014-04-03 | 2018-05-01 | Robert Bosch Gmbh | Secondary heating device for diesel exhaust fluid tank |
FR3038592A1 (en) * | 2015-07-10 | 2017-01-13 | Coutier Moulage Gen Ind | LIQUID TRANSFER DEVICE AND TANK ASSEMBLY COMPRISING SUCH A TRANSFER DEVICE |
US10634273B2 (en) | 2015-07-10 | 2020-04-28 | Akwel Sa | Liquid transfer device and a tank assembly comprising such a transfer device |
CN107923284A (en) * | 2016-03-02 | 2018-04-17 | 日立建机株式会社 | Engineering machinery |
CN107923284B (en) * | 2016-03-02 | 2020-02-28 | 日立建机株式会社 | Construction machine |
DE102017201140A1 (en) | 2017-01-25 | 2018-07-26 | Robert Bosch Gmbh | Filter arrangement for a reducing agent storage tank or a functional unit |
DE102017201124A1 (en) | 2017-01-25 | 2018-07-26 | Robert Bosch Gmbh | Delivery module for a dosing system for dosing a reducing agent in the exhaust system of a motor vehicle and dosing |
WO2018137914A1 (en) | 2017-01-25 | 2018-08-02 | Robert Bosch Gmbh | Delivery module for a metering system for metering a reducing agent into the exhaust gas section of a motor vehicle, and metering system |
US10914216B2 (en) | 2017-01-25 | 2021-02-09 | Robert Bosch Gmbh | Delivery module for a metering system for metering a reducing agent into the exhaust gas section of a motor vehicle, and metering system |
IT201900018572A1 (en) * | 2019-10-11 | 2021-04-11 | Magneti Marelli Spa | LIQUID FEED UNIT ON BOARD VEHICLE AND LIQUID FEED ASSEMBLY ON BOARD VEHICLE |
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R012 | Request for examination validly filed | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |