EP2582937A1 - Dispositif pour refouler un agent de réduction liquide - Google Patents

Dispositif pour refouler un agent de réduction liquide

Info

Publication number
EP2582937A1
EP2582937A1 EP11724621.5A EP11724621A EP2582937A1 EP 2582937 A1 EP2582937 A1 EP 2582937A1 EP 11724621 A EP11724621 A EP 11724621A EP 2582937 A1 EP2582937 A1 EP 2582937A1
Authority
EP
European Patent Office
Prior art keywords
heat
reducing agent
connection element
conduction structure
heat conduction
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.)
Withdrawn
Application number
EP11724621.5A
Other languages
German (de)
English (en)
Inventor
Rolf BRÜCK
Jan Hodgson
Sven Schepers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Emitec Gesellschaft fuer Emissionstechnologie mbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Emitec Gesellschaft fuer Emissionstechnologie mbH filed Critical Emitec Gesellschaft fuer Emissionstechnologie mbH
Publication of EP2582937A1 publication Critical patent/EP2582937A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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]
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2931—Diverse fluid containing pressure systems
    • Y10T137/3115—Gas pressure storage over or displacement of liquid
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2931—Diverse fluid containing pressure systems
    • Y10T137/3115—Gas pressure storage over or displacement of liquid
    • Y10T137/3121—With return of liquid to supply
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • Y10T137/8342—Liquid level responsive indicator, recorder or alarm

Definitions

  • the invention relates to a device for conveying liquid reducing agent from a tank to a feed element for adding the liquid reducing agent to an exhaust gas treatment device of an internal combustion engine.
  • exhaust gas treatment devices are increasingly used, into which a liquid reducing agent is supplied.
  • One method of exhaust gas purification which is frequently used for this purpose is the selective catalytic reduction (SCR) process.
  • SCR selective catalytic reduction
  • a reducing agent preferably ammonia
  • NOx nitrogen oxide compounds
  • the selective catalytic reduction process finds particular application in lean burn internal combustion engines (such as diesel engines). Such internal combustion engines typically have a particularly high output of nitrogen oxide compounds.
  • the reducing agent (or ammonia) is not stored directly in mobile applications, but stored in the form of a precursor.
  • a precursor is, for example, urea, or in particular urea-water solution.
  • Particularly frequently used is a 32.5% urea-water solution, which is also available under the trade name AdBlue.
  • AdBlue AdBlue
  • a device for the delivery or supply of reducing agent must be designed in such a way that that it is quickly able to thaw at least a starting volume of reducing agent, so that the operation of the exhaust gas treatment device is directly possible, even if in the device still frozen reducing agent is present.
  • devices for conveying liquid reducing agent which are arranged directly on a tank for the liquid reducing agent and which are connected to a heatable line through which the reducing agent can be conveyed by the device via the feed element in an exhaust system. It has been found that in particular the connection of the conveying device for the line freezes very easily. A thermal insulation can be difficult to provide here, so that the reducing agent normally freezes in this area first. At the same time, this area must be free of ice, so that a safe supply of reducing agent can take place after the internal combustion engine and the device according to the invention have been put into operation.
  • a device for conveying liquid reducing agent which at least partially solves the problems described with reference to the prior art.
  • a device is to be specified which can be put into operation particularly quickly and reliably when there is a frozen reducing agent inside the device and at the same time is particularly cost-effective, e.g. by eliminating the need for additional electrical heating systems.
  • the device according to the invention for conveying liquid reducing agent from a tank to a feed element has at least one connection element for connecting a reducing agent line and a system heater, and a heat conduction structure which is set up to transport heat from the system heater to the connection element.
  • the device for conveying liquid reducing agent has, in particular, a delivery pump which, as required, can convey liquid reducing agent out of a tank and supply it under a defined pressure.
  • one or more filter elements may be provided in the device, which filter the reducing agent so that contaminants and particles in the reducing agent do not enter the device for conveying, into the pump or into the feed element.
  • the device regularly defines a flow direction of the reducing agent from the tank to the connection element.
  • a coarse filter and then a fine filter are arranged upstream of the pump in the flow direction.
  • various sensors for monitoring the reducing agent may be provided in the device. These may be, for example, pressure sensors, temperature sensors, mass flow sensors and / or quality sensors, as well as combinations of these sensors.
  • at least one valve can be provided in the device.
  • a valve can z. B. be designed as a return valve, which is located in a return line for reducing agent out of the device back into the tank. The return line typically branches from a delivery line of the device in the flow direction behind the Pum e from.
  • the feed element typically comprises an injector through which the reducing agent can be fed to a waste gas treatment device in a defined manner.
  • the amount of reducing agent supplied by the supply element of an exhaust gas treatment device can be precisely defined via a pressure present at an injector, the geometry of the injector and / or the opening time of the injector.
  • connection element on the device for connecting a reducing agent line can be designed as a coupling or as a socket, wherein the reducing agent line is mounted there in a fluid-tight manner.
  • the neck can be designed, for example, with a smooth surface and / or with a corrugated surface, so that the reducing agent line rests on the neck in a fluid-tight manner or encloses it in a fluid-tight manner.
  • the reducing agent line can be designed to be heatable.
  • the reducing agent line may be a (flexible) hose in which heating wires are embedded.
  • the reducing agent line is designed in the manner of a rigid line (eg as a pipe). The reducing agent line does not cover the connecting element regularly, so that the connecting element is regularly exposed directly to the present temperatures.
  • a heat conduction structure is provided in the device according to the invention, which transports heat from a system heating of the device according to the invention to the connection element.
  • the heat conduction structure is typically designed as a metallic block with a high thermal conductivity.
  • Particularly preferred material for the heat conduction structure is steel, in particular stainless steel or aluminum.
  • Aluminum is characterized by a particularly advantageous ratio of weight and heat capacity to thermal conductivity.
  • the system heating is integrated in a functional component of the device for conveying the reducing agent (such as, for example, in a structural unit with the pump and / or the filter), so that the system heating z. B. is integrated in one of these component housing.
  • the heating power of such a system heating is preferably between 20 W [watt] and 500 W [watt], more preferably between 50 W [watt] and 100 W [watt].
  • the system heating is therefore not directly disposed on the connection element but away from it, z. At least 5 cm [centimeters] or even at least 10 cm [centimeters]. It is particularly preferred that the device for conveying the reducing agent has only one (individual) system heating, which is not only assigned directly to a functional component but is also in thermally conductive contact with the connection element. This thermally conductive contact is in particular designed so that a significant (especially compared to other areas reinforced) heat flow to the connection element is detected, so that in a frozen system z. B. after the functional component in particular a thawing of frozen reducing agent is achieved at / in the connection element.
  • the device according to the invention is particularly advantageous if the heat conduction structure is set up to transport at least 20% of the heating energy generated by the system heating to the connection element. It is particularly preferred if the heat-conducting structure is set up to transport at least 40% and in particular at least 60% of the heating energy generated by the system heating to the connection element.
  • the heat conduction structure so Be isolated environment that the heat flow from the system heating is preferably carried out in the direction of the connection element, while the heat flow is made difficult in other areas of the device according to the invention. This can be achieved, for example, by insulating materials which surround the heat-conducting structure in certain areas.
  • the cross section of the connections of the heat conduction structure to the environment is so small that only a small heat transfer from the heat conduction structure to the environment takes place.
  • environment is meant here in particular the housing and / or other functional components of the device according to the invention.
  • the device according to the invention is furthermore advantageous if the heat-conducting structure has a heat capacity of less than 500 J / K [Joules per Kelvin].
  • the heat conduction structure has a heat capacity of less than 250 J / K [Joule per Kelvin] and more preferably less than 100 J / K [Joule per Kelvin].
  • the system heater When the device according to the invention is put into operation, the system heater must first heat up the heat-conducting structure before heat passes from the system heating to the connection element. Therefore, it is advantageous if the heat capacity of the heat conduction structure is particularly small. At the same time, however, the heat conductivity of the heat-conducting structure from the system heating to the connecting element should be as high as possible.
  • the device according to the invention is also advantageous when the heat-conducting structure from the system heating to the connection element has a thermal conductivity of more than 10 W / K [watts per Kelvin].
  • the heat-conducting structure preferably even has a thermal conductivity of more than 15 W / K [watts per Kelvin] and in particular of more than 20 W / K [watts per Kelvin] from the system heating to the connecting element.
  • a thermal conductivity of 10 W / K [watts per Kelvin] it is meant that with a temperature difference of 1 K [Kelvin] between the system heater and the connection element, a heat energy amount of 10 W [Watt] flows from the system heater to the connection element.
  • the device according to the invention is advantageous if the device has no further active heating in addition to the system heating.
  • Another active heating in the device for the promotion of reducing agent is regularly a significant cost factor.
  • the cost of the heating element of the heater itself but also the energy consumption of the heater during operation and the necessary to control the heating electronics are taken into account.
  • Due to the heat conduction structure in the device according to the invention an efficient distribution of the heating energy of the system heating can be achieved in the device according to the invention, so that no additional active heaters are necessary.
  • other active (ie, in particular controllable or independently demandable switched on / off) heating systems can be present externally, the z. B. concern the tank or a part of the external reducing agent lines.
  • the individual system heating accordingly relates in particular to the section from the tank removal point to the connection element, so that it is solely responsible for the thawing of this section. Furthermore, it is advantageous if the heat conduction structure has a heat flow direction from the system heater to the connection element, and the heat conduction structure along the heat flow direction has a continuously tapering cross section. In the heat conduction structure, heat losses normally occur outwardly along the heat flow direction. For this reason, the amount of heat transported by the heat conduction structure from the system heater to the connection element along the heat flow direction becomes smaller and smaller. It is therefore advantageous to adapt the heat conduction structure in its heat transporting cross section to the heat actually transported in the heat conduction structure.
  • the taper of the cross section is continuous (strictly continuous) and / or in (small) NEN) steps or paragraphs can be made, so that in particular no broadening is provided to the connection element.
  • the device according to the invention is advantageous if the heat-conducting structure comprises at least one heat pipe.
  • a heat pipe is also known as the heat pipe.
  • a heat pipe allows a very large heat transfer even at low temperature differences over long distances.
  • a heat pipe is a hollow body in which a fluid is located. The fluid is typically partially in the gaseous and partly in the liquid phase and can transport heat. As a result, the liquid fluid is vaporized near and through the system heater, flows to the opposite end of the heat pipe near the port, and discharges the heat to the port.
  • the bathleit Jardin several heat pipes can be provided to transport heat in a particularly efficient manner.
  • the device has a housing, and the heat-conducting structure is in heat-conducting connection with the housing via at least one thermal bridge, wherein the at least one thermal bridge is designed such that a maximum heat flow between 5 W [Watt] and 50 W [Watt] flows from the heat conducting structure into the housing when frozen reducing agent is present on the housing.
  • the housing of a device according to the invention is preferably metallic.
  • the housing is preferably arranged at least partially in a tank for the liquid reducing agent. This allows a particularly space-saving arrangement of the device according to the invention, because the device according to the invention then does not protrude beyond the tank and the tank can be adapted to the space available in a motor vehicle space.
  • the reducing agent in the tank can freeze.
  • a vent opening is melted into a frozen deoxidizer ice blanket present in the tank, by which the negative pressure can be compensated.
  • Such a ventilation opening can also be produced, for example, where an ice cover is adjacent to the housing of a device according to the invention.
  • a ventilation opening can also be produced, for example, where an ice cover is adjacent to the housing of a device according to the invention.
  • the ice cover in the reducing agent tank represents a very large heat sink in relation to the device for conveying liquid reducing agent. Heating up this heat sink with electrical heating energy is very complicated, and the heating energy used here would then no longer be available elsewhere. For example, the consumed heating energy would no longer be available at the connection element and only inefficient heating of the connection element for a reducing agent line would take place on the device according to the invention.
  • thermal bridge from the heat-conducting structure to the housing, so that a vent opening can be melted into an ice cover.
  • only a single thermal bridge is proposed, which provides a targeted and limited amount of heat for generating a vent in the ice cover near (in the immediate vicinity) of the housing. This amount of heat is preferably also generated by the (individual) system heating.
  • a motor vehicle comprising an internal combustion engine and an exhaust gas treatment device for Cleaning the exhaust gases of the internal combustion engine and a device according to the invention, wherein the exhaust gas treatment device comprises a supply element for supplying reducing agent to the exhaust gas treatment device, and the supply element is connected by a reducing agent line to the device.
  • the apparatus of the invention conveys liquid reductant from a tank for the liquid reductant through the reductant conduit to the feed element.
  • FIG. 1 shows a tank with a first embodiment of a device according to the invention
  • FIG. 2 shows a second embodiment of a device according to the invention
  • FIG. 3 shows a potion with a third embodiment of a device according to the invention
  • Fig. 5 a motor vehicle having a device according to the invention.
  • Fig. 1 shows a tank 3, in which a device 1 according to the invention is installed at the bottom 36.
  • the device 1 is arranged at the bottom of the tank 3 in the region of a sump 29.
  • the device 1 has a removal point 31, through which the tank 3 in the region of the sump 29 liquid reducing agent 2 can be removed.
  • the heat conduction structure 8 is provided within the device 1.
  • the heat conduction structure 8 is configured to transport heat energy from the system heater 7 in a heat flow direction 9 to a connection element 5.
  • a reducing agent line 6 may be connected for conveying reducing agent to a supply element. This can be done by means of a connector plug 28 on the reducing agent line 6, which fits to the connection element 5.
  • the heat-conducting structure 8 is designed in the manner of a (in particular one-piece) metallic block. At the perennialleit Jardin 8 different components of the device 1 according to the invention are mounted. These include, for example, a filter 20, a pump 18, a return valve 19 and a sensor 21. The various components are connected to one another via channels 34 at least partially integrated in the block in the heat-conducting structure 8. Thus, the heat conduction structure 8 also ensures efficient heating of said components and the channels 34. Also reducing agent 2 in the components and in the channels 34 is heated by the heat conduction structure 8. Some of the individual components also consume electrical energy, wherein energy losses in the components occur as heat energy, which is at least partially introduced into the heat conduction structure 8 and is efficiently distributed by the heat conduction structure 8.
  • the heat conduction structure 8 has a decreasing, tapered cross section 10 in the heat flow direction 9 from the system heater 7 to the connection element 5.
  • the device 1 also has a metallic housing 12, which separates the device 1 from the tank 3. Between the heat conducting structure 8 and the housing 12, thermal bridges 13 are provided, by means of which heat energy is transferred from the heat conducting structure 8 to the housing 12 and thus also to the reducing agent 2 in the tank 3.
  • Fig. 2 shows a second embodiment of a device according to the invention l.
  • This embodiment variant also has a heat conduction structure 8, a system heater 7 and a connection element 5 on.
  • a connection element 5 can be connected via a connector 28, a reducing agent line 6.
  • the heat-conducting structure 8 is also designed according to FIG. 2 as a metallic block. However, this 5 has a taper 30.
  • the taper 30 also represents a recess in the heat-conducting structure 8. The taper 30 reduces the weight and the heat capacity of the heat-conducting structure 8.
  • the thermal conductivity of the heat-conducting structure 8 from the system heating 7 to the connecting element 5 is also degraded because the taper 30 reduces the heat-conducting cross section of the heat conduction structure 8.
  • a heat pipe 11 is mounted for the transport of heat.
  • the heat pipe 11 is preferably soldered to the heat-conducting structure 8, or soldered into it, in order to realize the most efficient heat transfer from the heat-conducting structure 8 to the heat pipe 11.
  • any cohesive connection technology is suitable for connecting the heat-conducting structure 8 to the heat pipe 11.
  • the device 1 according to FIG. 2 is likewise encapsulated and therefore also has a housing 12.
  • FIG. 3 shows a tank 3 with a further embodiment variant of a device 1 according to the invention.
  • This device 1 according to the invention is mounted on an upper side 35 of the tank 3 and extends
  • a removal tube 27 is arranged with a arranged at the end removal point 31, which extends over the Height of the tank 1 from the top 35 to the bottom 36 extends.
  • FIG. 30 tion 1 also has a system heater 7, a heat conduction structure 8 and a connection element 5.
  • a reducing agent line 6 with a connection plug 28 can be fastened to the connection element 5.
  • the heat conduction structure 8 is designed to heat energy gie from the system heater 7 to the connection element 5 to transport.
  • the heat conduction structure 8 has a heat pipe 11.
  • various components of the device 1 are also mounted here. These include, for example, a filter 20, a pump 18 and a sensor 21.
  • the system heater 7 is at least partially disposed within the filter 20 in the embodiment according to FIG. In addition, the system heater 7 extends into the removal tube 27 and is thus able to melt a vent passage 37 through a blanket 38 of frozen reductant 14 in the tank 3, regardless of the height of the blanket 38 of frozen reductant 14 in the tank Tank 3 exists.
  • the sampling tube 27 is preferably also metallic.
  • FIG. 4 illustrates the structure of a heat pipe 11.
  • a heat pipe 11 has a preferably metallic tube 22 as an outer shell. This tube 22 is sealed on both sides. Within the tube 22 wicks 23 are arranged. These wicks 23 extend from a heat receiving point 32 of the heat pipe 11 to a heat dissipation point 33 of the heat pipe 11. At the heat receiving point 32 is located in the heat pipe 11 is normally liquid transport medium 25 before. During heat absorption, this liquid transport medium 25 evaporates and passes through its increasing pressure to the heat discharge point 33.
  • a heat pipe 11 typically gaseous transport medium 26 is present, which condenses while releasing the heat stored in it. Due to capillary forces, the condensed transport medium flows along the wicks 23 back to the heat receiving point 32. In this way, along a heat flow direction 24, from the heat receiving point 32 to the heat discharge point 33, a continuous rather heat flow.
  • a heat pipe 11 is also referred to as a heat pipe.
  • FIG. 5 shows a motor vehicle 15 comprising an internal combustion engine 16 and an exhaust gas treatment device 17 for cleaning the exhaust gases of the internal combustion engine 16.
  • the exhaust gas treatment device 17 has a supply element 4 for supplying liquid reducing agent.
  • the feed element 4 is supplied by a device 1 according to the invention with reducing agent from a tank 3.
  • the device according to the invention for conveying liquid reducing agent described here at least partially solves the problems described with reference to the prior art.
  • a device has been specified which can be put into operation particularly quickly and reliably if there is frozen reducing agent inside the device and which is at the same time particularly cost-effective, e.g. B. can be dispensed with by additional electrical heating systems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un dispositif (1) servant à refouler un agent de réduction liquide (2) entre un réservoir (3) et un élément d'alimentation (4), qui présente un élément de raccordement (5) pour une conduite d'agent de réduction (6) et un système chauffant (7) ainsi qu'une structure thermoconductrice (8) conçue pour transporter la chaleur du système chauffant (7) à l'élément de raccordement (5).
EP11724621.5A 2010-06-16 2011-06-08 Dispositif pour refouler un agent de réduction liquide Withdrawn EP2582937A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010024022 DE102010024022A1 (de) 2010-06-16 2010-06-16 Vorrichtung zur Förderung von flüssigem Reduktionsmittel
PCT/EP2011/059428 WO2011157602A1 (fr) 2010-06-16 2011-06-08 Dispositif pour refouler un agent de réduction liquide

Publications (1)

Publication Number Publication Date
EP2582937A1 true EP2582937A1 (fr) 2013-04-24

Family

ID=44475177

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11724621.5A Withdrawn EP2582937A1 (fr) 2010-06-16 2011-06-08 Dispositif pour refouler un agent de réduction liquide

Country Status (5)

Country Link
US (1) US8955311B2 (fr)
EP (1) EP2582937A1 (fr)
JP (1) JP2013530339A (fr)
DE (1) DE102010024022A1 (fr)
WO (1) WO2011157602A1 (fr)

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CN103291421B (zh) * 2012-02-23 2016-06-08 天纳克（苏州）排放***有限公司 空气辅助式还原剂计量喷射***
DE102012006249A1 (de) * 2012-03-28 2013-10-02 Emitec Denmark A/S Fördereinheit für ein flüssiges Additiv mit einem Temperatursensor
WO2013174986A1 (fr) * 2012-05-25 2013-11-28 Emitec Gesellschaft Für Emissionstechnologie Mbh Contenant comprenant un dispositif de chauffage pour un réservoir destiné au stockage d'un additif liquide
DE102012109675A1 (de) * 2012-10-11 2014-04-30 Emitec Denmark A/S Vorrichtung zur Bereitstellung eines flüssigen Additivs
DE102012020948B4 (de) * 2012-10-25 2017-02-16 Kautex Textron Gmbh & Co. Kg Einrichtung zur Bevorratung und Förderung eines flüssigen Additivs, insbesondere zur katalytischen Abgasentstickung an einem Kfz
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US8955311B2 (en) 2015-02-17
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JP2013530339A (ja) 2013-07-25
DE102010024022A1 (de) 2011-12-22

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