DE102008000594A1 - Device for emptying reducing agent unit of internal combustion engine, particularly exhaust system, has mechanical suction or pressure unit, whose suction or pressure mechanism is impinged by mechanical energy storage - Google Patents
Device for emptying reducing agent unit of internal combustion engine, particularly exhaust system, has mechanical suction or pressure unit, whose suction or pressure mechanism is impinged by mechanical energy storage Download PDFInfo
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- DE102008000594A1 DE102008000594A1 DE102008000594A DE102008000594A DE102008000594A1 DE 102008000594 A1 DE102008000594 A1 DE 102008000594A1 DE 102008000594 A DE102008000594 A DE 102008000594A DE 102008000594 A DE102008000594 A DE 102008000594A DE 102008000594 A1 DE102008000594 A1 DE 102008000594A1
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- Germany
- Prior art keywords
- reducing agent
- suction
- piston
- pressure
- mechanical energy
- 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]
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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
-
- 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
- F01N2610/1433—Pumps
-
- 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
- F01N2610/1466—Means for venting air out of conduits or tanks
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- 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
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Entleeren einer Reduktionsmittelvorrichtung einer Brennkraftmaschine, wobei die Vorrichtung bei einer Abschaltung der Reduktionsmittelvorrichtung Reduktionsmittel in einen Reduktionsmitteltank zurückführt.The The invention relates to a device for emptying a reducing agent device an internal combustion engine, wherein the device at a shutdown the reducing agent device reducing agent in a reducing agent tank returns.
Stand der TechnikState of the art
Abgasreinigungssysteme moderner Fahrzeuge weisen beispielsweise Stickstoffoxyd-Reduktionssysteme (DeNOx-Systeme) auf. Im Stand der Technik ist es hierbei geläufig, solchen DeNOx-Systemen ein Reduktionsmittel zuzuführen, beispielsweise eine Harnstoffwasserlösung für AdBlue-Anwendungen. Solche Dosiersysteme werden nach dem Abstellen des Motors weitgehend leer gesaugt, um ein eventuelles Einfrieren zu verhindern, da das Reduktionsmittel einen relativ hoch liegenden Gefrierpunkt hat. Um Schäden beispielsweise am Dosierventil durch eventuell auftretenden Eisdruck zu vermeiden, erfolgt demzufolge eine Entleerung des Systems. Im Stand der Technik geschieht dies durch Umschalten der Förderrichtung der Förderpumpe beziehungsweise Dosierpumpe oder durch Ventile an der Förderpumpe, die entsprechend elektrisch betätigt werden. Die im Stand der Technik bekannten Anwendungen zum Entleeren der Reduktionsmittelvorrichtung setzen voraus, dass die Bordspannung auch nach Abschalten des Fahrzeugs (also in einem Zustand, in dem das Entleeren der Reduktionsmittelvorrichtung erfolgen soll) die Bordspannung anliegt. Moderne Fahrzeuge weisen aber zunehmend eine Not-Aus-Schaltung auf, die beispielsweise bei Unfällen die Bordspannung von elektrischen und elektronischen Einrichtungen des Fahrzeugs trennt, um unerwünschte Kurzschlüsse oder nachteilige elektrische Erscheinungen zu verhindern; zunehmend gibt es Fahrzeuge mit von einem Bediener zu betätigenden Not-Aus-Schaltern, wie beispielsweise Gefahrguttransporter. In diesen Fällen wird das gesamte Bordnetz spannungsfrei geschaltet, sodass ein Entleeren der Reduktionsmittelvorrichtung durch Umkehren der Förderrichtung der Förderpumpe nicht möglich ist, da die zu deren Betrieb erforderliche Bordspannung nicht mehr anliegt. In solchen Fällen kann im Stand der Technik eine nachteilige Auswirkung auf die Reduktionsmittelvorrichtung durch fehlendes Entleeren derselben nicht ausgeschlossen werden.emission control systems Modern vehicles have, for example, nitrogen oxide reduction systems (DeNOx systems). In the prior art, it is common to such DeNOx systems to supply a reducing agent, such as a urea water solution for AdBlue applications. Such Dosing systems are largely empty after stopping the engine sucked to prevent a possible freezing, as the reducing agent has a relatively high freezing point. To damage, for example to avoid any possible ice pressure on the dosing valve Consequently, an emptying of the system. In the prior art This happens by switching the conveying direction of the feed pump or dosing pump or valves on the feed pump, the corresponding electrically operated become. The known in the art applications for emptying the reducing agent device assume that the on-board voltage also after switching off the vehicle (ie in a state in which the emptying of the reducing agent device should take place) On-board voltage is applied. But modern vehicles increasingly have an emergency stop circuit, for example, in accidents the on-board voltage of electrical and electronic equipment the vehicle separates to unwanted shorts or to prevent adverse electrical phenomena; increasingly there are vehicles with operator-actuated emergency stop switches, such as dangerous goods transporters. In these cases will the entire on-board network is de-energized, so that emptying the Reducing agent device by reversing the conveying direction of the feed pump not possible is because the on-board voltage required for their operation is no longer is applied. In such cases In the prior art, this can adversely affect the reductant device can not be excluded by not emptying them.
Ziel der Erfindung ist es, auch bei Fahrzeugen mit Not-Aus-Schaltungen oder -schaltern eine zuverlässige Entleerung der Reduktionsmittelvorrichtung bewirken zu können, um nachteilige Auswirkungen von Reduktionsmittel nach Abstellen des Fahrzeugs auf das feinmechanisch konstruierte, empfindliche Dosierventil zu vermeiden.aim The invention is also in vehicles with emergency stop circuits or switch a reliable one To cause emptying of the reducing agent device in order to Adverse effects of reducing agent after stopping Vehicle on the fine mechanical constructed, sensitive metering valve to avoid.
Offenbarung der ErfindungDisclosure of the invention
Hierzu wird eine Vorrichtung zum Entleeren einer Reduktionsmittelvorrichtung einer Brennkraftmaschine, insbesondere von deren Abgasanlage, vorgeschlagen, wobei die Vorrichtung bei einer Abschaltung der Reduktionsmittelvorrichtung Reduktionsmittel in einen Reduktionsmitteltank und/oder in einen gegen Einfrieren unempfindlichen Bereich der Vorrichtung oder der Reduktionsmittelvorrichtung zurückführt. Hierbei ist vorgesehen, dass eine mechanische Saug- und/oder Druckvorrichtung, deren Saug- und/oder Druckorgan mittels mindestens eines mechanischen Energiespeichers, insbesondere Feder, für einen das Reduktionsmittel in den Reduktionstank und/oder in einen gegen Einfrieren unempfindlichen Bereich fördernden Saug- und/oder Druckvorgang beaufschlagbar ist. Anders als im Stand der Technik wird also keine elektrische Energie aufgewendet, wie sie beim Umschalten der Förderrichtung und beim entsprechenden Betrieb der Förderpumpe des Reduktionsmittels benötigt wird, sondern die mechanische Energie, wie sie in dem mechanischen Energiespeicher, beispielsweise einer Feder, gespeichert ist. Der mechanische Energiespeicher beaufschlagt hierbei eine mechanische Saug- und/oder Druckvorrichtung, die das Saug- und/oder Druckorgan aufweist und das Reduktionsmittel in den Reduktionsmitteltank befördert. Mit Reduktionsmitteltank ist hierbei nicht notwendig der zur Bevorratung des Reduktionsmittels dienende Reduktionsmitteltank gemeint, es kommt auch eine Zwischenspeichereinrichtung in Betracht oder ein gegen Einfrieren unempfindlicher Bereich der Reduktionsmittelvorrichtung oder der Vorrichtung. Beim Betrieb der Reduktionsmittelvorrichtung wird demzufolge mechanische Energie im mechanischen Energiespeicher vorgehalten, die dann die mechanische Saug- und/oder Druckvorrichtung beaufschlagt, wenn beispielsweise nach Abschalten der Brennkraftmaschine, oder bei einem Not-Aus derselben, das Reduktionsmittel in den Reduktionsmitteltank zurückbefördert werden soll.For this is a device for emptying a reducing agent device an internal combustion engine, in particular its exhaust system, proposed, wherein the device at a shutdown of the reducing agent device Reducing agent in a reducing agent tank and / or in a against freezing insensitive area of the device or the Reducing agent device leads back. in this connection it is provided that a mechanical suction and / or pressure device, their suction and / or pressure member by means of at least one mechanical Energy storage, in particular spring, for a reducing agent in the reduction tank and / or in an anti-freezing area promoting Suction and / or printing acted upon is. Unlike in the prior art so no electrical Energy spent, as when switching the conveying direction and in the corresponding operation of the delivery pump of the reducing agent needed but the mechanical energy, as in the mechanical Energy storage, such as a spring is stored. Of the mechanical energy storage acts on a mechanical Suction and / or pressure device, which has the suction and / or pressure element and the reducing agent transported into the reducing agent tank. With reducing agent tank is not necessary for stocking By the reducing agent tank serving as the reducing agent, it means also a temporary storage device or against Freezing insensitive area of the reducing agent device or the device. During operation of the reducing agent device is therefore mechanical energy in the mechanical energy storage held, then the mechanical suction and / or pressure device acted upon, for example, after switching off the internal combustion engine, or at an emergency stop the same, the reducing agent are returned to the reducing agent tank should.
In einer Ausbildung der Erfindung ist das Saug- und/oder Druckorgan eine Kolben-Zylinder-Einheit. Kolben-Zylinder-Einheiten sind als Saug- und/oder Druckorgane bekannt. Je nach Anbindung wird das zu befördernde Medium entweder abgesaugt oder gedrückt. In einer bevorzugten Ausbildung des Saug- und/oder Druckorgans ist die Kolben-Zylinder-Einheit derart ausgeführt, dass sie mit einer einzigen Kolbenhubbewegung das gesamte leer zu fördernde Volumen der Reduktionsmittelvorrichtung leeren kann. Das Volumen im entsprechenden Zylinder der Kolben-Zylinder-Einheit ist demzufolge so groß wie oder größer als das leer zu saugende Volumen der Reduktionsmittelvorrichtung.In An embodiment of the invention is the suction and / or pressure member a piston-cylinder unit. Piston-cylinder units are as Suction and / or pressure organs known. Depending on the connection that becomes transported Medium either aspirated or pressed. In a preferred embodiment of the suction and / or Pressure element, the piston-cylinder unit is designed such that They with a single Kolbenhubbewegung the entire empty to be promoted Volume of the reducing agent device can empty. The volume in the corresponding cylinder of the piston-cylinder unit is therefore as big as or greater than the empty volume of the reducing agent device to be sucked.
In einer weiteren Ausführungsform ist vorgesehen, dass der Kolben der Kolben-Zylinder-Einheit von dem mechanischen Energiespeicher beaufschlagt ist. In dieser Ausführungsform wird demzufolge der Kolben der Kolben-Zylinder-Einheit durch Energiefreisetzung aus dem mechanischen Energiespeicher betätigt. Die Beaufschlagung kann direkt oder indirekt erfolgen, also durch direktes Angreifen des mechanischen Energiespeichers am Kolben oder über ein Betätigungsmittel.In a further embodiment it is provided that the piston of the piston-cylinder unit is acted upon by the mechanical energy storage. In this embodiment, therefore, the piston of the piston-cylinder unit is actuated by energy release from the mechanical energy storage. The application can be direct or indirect, ie by directly attacking the mechanical energy storage on the piston or via an actuating means.
In einer bevorzugten Ausführungsform ist die Feder (als mechanischer Energiespeicher) eine Druckfeder, insbesondere eine Schraubendruckfeder. Eine solche Schraubendruckfeder lässt sich in der Kolben-Zylinder-Einheit sehr vorteilhaft anordnen, beispielsweise dergestalt, dass der Kolben als Stufenkolben ausgebildet ist und sich die Schraubendruckfeder an einer Kolbenstufe des Stufenkolbens einerseits und an einem Boden, insbesondere Stufenboden, des Zylinders andererseits abstützt. Auf diese Weise lässt sich eine sehr einfache und kostengünstige, dabei sehr betriebssichere Bauform erreichen.In a preferred embodiment is the spring (as a mechanical energy storage) a compression spring, in particular a helical compression spring. Such a helical compression spring let yourself arrange very advantageous in the piston-cylinder unit, for example such that the piston is designed as a stepped piston and the helical compression spring on a piston stage of the stepped piston on the one hand and on a floor, in particular stepped floor, of the cylinder on the other supported. That way a very simple and inexpensive, while very reliable Achieve design.
In einer weiteren Ausführungsform weist die Reduktionsmittelvorrichtung eine elektrische Reduktionsmittel-Förderpumpe auf. Die elektrische Reduktionsmittel-Förderpumpe dient im Betrieb der Reduktionsmittelvorrichtung der Zuführung von Reduktionsmittel. Diese wird der einfachen Ansteuerbarkeit und Regelbarkeit innerhalb der Brennkraftmaschine zugeordeter Regelsysteme halber elektrisch betrieben.In a further embodiment the reducing agent device has an electrical reducing agent feed pump on. The electric reducing agent feed pump is used in the operation of the reducing agent device of the supply of Reducing agent. This is the easy controllability and controllability within the internal combustion engine associated control systems half Electrically operated.
Weiter ist vorgesehen, dass die Reduktionsmittel-Förderpumpe mit dem Kolben zum Spannen der Feder über eine Reduktionsmittelleitung wirkverbunden ist. Im Betrieb der Reduktionsmittel-Förderpumpe wird durch einseitige Beaufschlagung des im Zylinder der Kolben-Zylinder-Einheit geführten Kolbens mit dem Pumpendruck ein Spannen der Feder als dem mechanischen Energiespeicher bewirkt. Der Kolben wird demzufolge entgegen der Wirkungsrichtung der Feder gedrückt, solange die Reduktionsmittel-Förderpumpe im Betrieb ist. Hierdurch findet eine Energiezufuhr zum mechanischen Energiespeicher statt. Wird die Reduktionsmittel-Förderpumpe abgeschaltet, entfällt diese Druckbeaufschlagung des Kolbens, so dass dieser unter Abgabe dieser Energie entsprechend der Druckwirkung der Feder in die entgegengesetzte Bewegung bewegt wird und das Saug- und/oder Druckorgan, das hierbei ausgebildet ist, das Reduktionsmittel aus der Reduktionsmittelvorrichtung in die Vorrichtung saugt und über eine zwischen dieser und dem Reduktionsmitteltank befindliche Rückführleitung in den Reduktionsmitteltank befördert.Further is provided that the reducing agent feed pump with the piston for Tensioning the spring over a reducing agent line is operatively connected. During operation of the reducing agent delivery pump is by unilateral loading of the cylinder in the piston-cylinder unit out Piston with the pump pressure a tensioning of the spring as the mechanical Energy storage causes. The piston is therefore contrary to the Direction of action of the spring pressed, as long as the reducing agent feed pump in operation. As a result, finds an energy supply to the mechanical Energy storage instead. Will the reducing agent feed pump switched off, not applicable this pressurization of the piston, so that this under delivery this energy according to the pressure effect of the spring in the opposite Movement is moved and the suction and / or pressure element, this case is formed, the reducing agent from the reducing agent device into the device sucks and over a return line located between the latter and the reducing agent tank transported into the reducing agent tank.
In einer bevorzugten Ausführungsform ist auf der einen Seite des Kolbens eine Saug- oder eine Druckkammer für das Entfernen von Reduktionsmittel ausgebildet, während auf der anderen Seite des Kolbens eine Druckkammer für von der Reduktionsmittel-Förderpumpe gefördertes Reduktionsmittel ausgebildet ist. Der Kolben ist demzufolge beidseitig wirksam, nämlich einerseits über die Druckkammer für von der Reduktionsmittel-Förderpumpe gefördertes Reduktionsmittel zum Spannen der Feder, also zur Energiezufuhr zum mechanischen Energiespeicher, und auf der anderen Seite als Saug- oder Druckkammer, bevorzugt als Saugkammer, für das Entfernen von Reduktionsmittel aus der Reduktionsmittelvorrichtung. Hierdurch lässt sich eine besonders einfache und wirksame Ausführung erreichen.In a preferred embodiment is a suction or a pressure chamber on one side of the piston for the Removal of reducing agent is formed while on the other side of the piston a pressure chamber for from the reducing agent feed pump funded Reducing agent is formed. The piston is therefore effective on both sides, namely on the one hand over the pressure chamber for from the reducing agent feed pump funded Reducing agent for tensioning the spring, so the energy supply to mechanical energy storage, and on the other hand as suction or pressure chamber, preferably as a suction chamber, for the removal of reducing agent from the reducing agent device. This allows a particularly simple and effective execution to reach.
Weiter wird ein Verfahren zum Entleeren einer Reduktionsmittelvorrichtung einer Brennkraftmaschine vorgeschlagen, wobei die Vorrichtung bei einer Abschaltung der Reduktionsmittelvorrichtung Reduktionsmittel in einen Reduktionsmitteltank und/oder in einen gegen Einfrieren unempfindlichen Bereich der Vorrichtung oder der Reduktionsmittelvorrichtung zurückführt. Dabei ist vorgesehen, dass das Reduktionsmittel mittels eines von einem mechanischen Energiespeicher betätigten oder ausgeführten Saug- oder Druckvorgangs in den Reduktionsmitteltank und/oder in einen gegen Einfrieren unempfindlichen Bereich rückgeführt wird.Further discloses a method for draining a reductant device proposed an internal combustion engine, wherein the device at a shutdown of the reducing agent device reducing agent into a reducing agent tank and / or against freezing insensitive area of the device or the reducing agent device returns. there it is provided that the reducing agent by means of one of a operated mechanical energy storage or executed Suction or printing process in the reducing agent tank and / or in a region insensitive to freezing is returned.
Weitere vorteilhafte Ausführungsformen ergeben sich aus den Unteransprüchen und Kombinationen derselben.Further advantageous embodiments emerge from the dependent claims and combinations thereof.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels näher erläutert, ohne jedoch hierauf beschränkt zu sein.The Invention will be explained in more detail with reference to an embodiment without but limited to this to be.
Es zeigtIt shows
die Figur eine Vorrichtung zum Entleeren einer Reduktionsmittelvorrichtung einer Brennkraftmaschine.the FIG. 1 shows a device for emptying a reducing agent device. FIG an internal combustion engine.
Ausführungsform(en) der ErfindungEmbodiment (s) the invention
Die
Figur zeigt eine Reduktionsmittelvorrichtung
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102008000594A DE102008000594A1 (en) | 2008-03-11 | 2008-03-11 | Device for emptying reducing agent unit of internal combustion engine, particularly exhaust system, has mechanical suction or pressure unit, whose suction or pressure mechanism is impinged by mechanical energy storage |
Applications Claiming Priority (1)
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DE102008000594A DE102008000594A1 (en) | 2008-03-11 | 2008-03-11 | Device for emptying reducing agent unit of internal combustion engine, particularly exhaust system, has mechanical suction or pressure unit, whose suction or pressure mechanism is impinged by mechanical energy storage |
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DE102008000594A1 true DE102008000594A1 (en) | 2009-09-17 |
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DE102008000594A Withdrawn DE102008000594A1 (en) | 2008-03-11 | 2008-03-11 | Device for emptying reducing agent unit of internal combustion engine, particularly exhaust system, has mechanical suction or pressure unit, whose suction or pressure mechanism is impinged by mechanical energy storage |
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Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102009014436A1 (en) * | 2009-03-26 | 2010-10-07 | Continental Automotive Gmbh | Conveyor system for conveying aqueous urea solution from storage tank to injector in motor vehicle, has storage subjected with pressure of pump and having volume allowing for emptying conveyor line |
DE102009032489A1 (en) * | 2009-07-09 | 2011-01-13 | J. Eberspächer GmbH & Co. KG | Ventilation device for injection nozzle of internal combustion engine of commercial motor vehicle, has pumping device with drive provided with line element, and displacement element deviated dependent on liquid pressure in line element |
DE102010003295A1 (en) * | 2010-03-25 | 2011-09-29 | Leica Microsystems (Schweiz) Ag | Lighting device for surgical microscope, particularly stereo microscope, has lighting system for providing two parallel light beam paths, and deflecting unit for deflecting parallel light beam paths on object to be observed |
DE102010028866A1 (en) | 2010-05-11 | 2011-11-17 | Robert Bosch Gmbh | Device for dosage of aqueous urea solution into exhaust line of combustion engine of motor car for post-treatment of exhaust gases to reduce nitrogen oxide emissions, has reducing agent guiding line for guiding orifice to pump |
WO2011157508A1 (en) * | 2010-06-14 | 2011-12-22 | Robert Bosch Gmbh | Device for ventilating an exhaust gas after-treatment system |
DE102011078393A1 (en) | 2011-06-30 | 2013-01-03 | Robert Bosch Gmbh | Dosing device for introduction of reducing agent into exhaust pipe of internal combustion engine, has dosing module comprising ice pressure compensation device with volume increasing devices, which are connected in resilient manner |
CN102939444A (en) * | 2010-06-09 | 2013-02-20 | 罗伯特·博世有限公司 | Pressure equalization device for hydraulic systems |
WO2013056963A1 (en) | 2011-10-21 | 2013-04-25 | Robert Bosch Gmbh | Metering apparatus |
WO2013087491A1 (en) * | 2011-12-12 | 2013-06-20 | Robert Bosch Gmbh | Dosing arrangement for a liquid exhaust gas after-treatment medium and dosing method |
WO2013087492A1 (en) * | 2011-12-12 | 2013-06-20 | Robert Bosch Gmbh | Metering arrangement for a liquid exhaust-gas aftertreatment medium and metering method |
DE102012008788A1 (en) * | 2012-05-07 | 2013-11-07 | Albonair Gmbh | Reducing agent metering system with automatic ventilation of the reducing agent line |
WO2013178384A1 (en) * | 2012-05-29 | 2013-12-05 | Robert Bosch Gmbh | Injection system, metering pump, exhaust gas treatment device, method |
US20140116545A1 (en) * | 2011-06-22 | 2014-05-01 | Robert Bosch Gmbh | Injection device |
FR2998615A1 (en) * | 2012-11-28 | 2014-05-30 | Inergy Automotive Systems Res | SCR SYSTEM AND METHOD FOR ITS PURGING |
WO2014086572A1 (en) * | 2012-12-07 | 2014-06-12 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Method for emptying a device for providing a liquid additive |
DE102012111919A1 (en) * | 2012-12-07 | 2014-06-12 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Method for operating a device for providing a liquid additive |
DE102013008693A1 (en) * | 2013-05-22 | 2014-11-27 | Audi Ag | Method for operating an exhaust system and corresponding exhaust system |
-
2008
- 2008-03-11 DE DE102008000594A patent/DE102008000594A1/en not_active Withdrawn
Cited By (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009014436B4 (en) * | 2009-03-26 | 2013-10-31 | Continental Automotive Gmbh | Conveying device for conveying an aqueous liquid |
DE102009014436A1 (en) * | 2009-03-26 | 2010-10-07 | Continental Automotive Gmbh | Conveyor system for conveying aqueous urea solution from storage tank to injector in motor vehicle, has storage subjected with pressure of pump and having volume allowing for emptying conveyor line |
DE102009032489A1 (en) * | 2009-07-09 | 2011-01-13 | J. Eberspächer GmbH & Co. KG | Ventilation device for injection nozzle of internal combustion engine of commercial motor vehicle, has pumping device with drive provided with line element, and displacement element deviated dependent on liquid pressure in line element |
DE102010003295A1 (en) * | 2010-03-25 | 2011-09-29 | Leica Microsystems (Schweiz) Ag | Lighting device for surgical microscope, particularly stereo microscope, has lighting system for providing two parallel light beam paths, and deflecting unit for deflecting parallel light beam paths on object to be observed |
DE102010028866A1 (en) | 2010-05-11 | 2011-11-17 | Robert Bosch Gmbh | Device for dosage of aqueous urea solution into exhaust line of combustion engine of motor car for post-treatment of exhaust gases to reduce nitrogen oxide emissions, has reducing agent guiding line for guiding orifice to pump |
DE102010028866B4 (en) | 2010-05-11 | 2024-01-18 | Robert Bosch Gmbh | Device for dosing a reducing agent into the exhaust system of a motor vehicle |
CN102939444A (en) * | 2010-06-09 | 2013-02-20 | 罗伯特·博世有限公司 | Pressure equalization device for hydraulic systems |
WO2011157508A1 (en) * | 2010-06-14 | 2011-12-22 | Robert Bosch Gmbh | Device for ventilating an exhaust gas after-treatment system |
CN102933808A (en) * | 2010-06-14 | 2013-02-13 | 罗伯特·博世有限公司 | Device for ventilating an exhaust gas after-treatment system |
US9222390B2 (en) * | 2011-06-22 | 2015-12-29 | Robert Bosch Gmbh | Injection device |
US20140116545A1 (en) * | 2011-06-22 | 2014-05-01 | Robert Bosch Gmbh | Injection device |
DE102011078393A1 (en) | 2011-06-30 | 2013-01-03 | Robert Bosch Gmbh | Dosing device for introduction of reducing agent into exhaust pipe of internal combustion engine, has dosing module comprising ice pressure compensation device with volume increasing devices, which are connected in resilient manner |
WO2013056963A1 (en) | 2011-10-21 | 2013-04-25 | Robert Bosch Gmbh | Metering apparatus |
DE102011085020A1 (en) | 2011-10-21 | 2013-04-25 | Robert Bosch Gmbh | metering |
US9416710B2 (en) | 2011-12-12 | 2016-08-16 | Robert Bosch Gmbh | Metering arrangement for a liquid exhaust-gas aftertreatment medium and metering method |
WO2013087492A1 (en) * | 2011-12-12 | 2013-06-20 | Robert Bosch Gmbh | Metering arrangement for a liquid exhaust-gas aftertreatment medium and metering method |
CN104053873A (en) * | 2011-12-12 | 2014-09-17 | 罗伯特·博世有限公司 | Metering arrangement for liquid exhaust-gas aftertreatment medium and metering method |
WO2013087491A1 (en) * | 2011-12-12 | 2013-06-20 | Robert Bosch Gmbh | Dosing arrangement for a liquid exhaust gas after-treatment medium and dosing method |
CN103975137B (en) * | 2011-12-12 | 2017-09-26 | 罗伯特·博世有限公司 | The metering device and metering method of liquid exhaust after-treatment agent |
CN104053873B (en) * | 2011-12-12 | 2017-09-22 | 罗伯特·博世有限公司 | Dosing mechanism and dispensing method for the exhaust aftertreatment medium of liquid |
CN103975137A (en) * | 2011-12-12 | 2014-08-06 | 罗伯特·博世有限公司 | Dosing arrangement for a liquid exhaust gas after-treatment medium and dosing method |
EP2662550A1 (en) * | 2012-05-07 | 2013-11-13 | Albonair GmbH | Reduction agent metering system with automatic ventilation of the reduction agent line |
DE102012008788A1 (en) * | 2012-05-07 | 2013-11-07 | Albonair Gmbh | Reducing agent metering system with automatic ventilation of the reducing agent line |
WO2013178384A1 (en) * | 2012-05-29 | 2013-12-05 | Robert Bosch Gmbh | Injection system, metering pump, exhaust gas treatment device, method |
EP2738366A1 (en) * | 2012-11-28 | 2014-06-04 | Inergy Automotive Systems Research (Société Anonyme) | SCR system and method for its purge |
FR2998615A1 (en) * | 2012-11-28 | 2014-05-30 | Inergy Automotive Systems Res | SCR SYSTEM AND METHOD FOR ITS PURGING |
US9353660B2 (en) | 2012-11-28 | 2016-05-31 | Inergy Automotive Systems Research | SCR system and a method of purging it |
CN103850761A (en) * | 2012-11-28 | 2014-06-11 | 英瑞杰汽车系统研究公司 | Selective catalytic reduction system and purging method thereof |
DE102012111917A1 (en) * | 2012-12-07 | 2014-06-12 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Method for emptying a device for providing a liquid additive |
DE102012111919A1 (en) * | 2012-12-07 | 2014-06-12 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Method for operating a device for providing a liquid additive |
WO2014086572A1 (en) * | 2012-12-07 | 2014-06-12 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Method for emptying a device for providing a liquid additive |
US10240595B2 (en) | 2012-12-07 | 2019-03-26 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Method for emptying a device for providing a liquid additive |
US10718244B2 (en) | 2012-12-07 | 2020-07-21 | Continental Automotive Gmbh | Method for operating a device for providing a liquid additive |
DE102013008693B4 (en) * | 2013-05-22 | 2016-11-10 | Audi Ag | Method for operating an exhaust system and corresponding exhaust system |
DE102013008693A1 (en) * | 2013-05-22 | 2014-11-27 | Audi Ag | Method for operating an exhaust system and corresponding exhaust system |
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