EP3152422A1 - Device for providing a liquid additive - Google Patents

Device for providing a liquid additive

Info

Publication number
EP3152422A1
EP3152422A1 EP15729110.5A EP15729110A EP3152422A1 EP 3152422 A1 EP3152422 A1 EP 3152422A1 EP 15729110 A EP15729110 A EP 15729110A EP 3152422 A1 EP3152422 A1 EP 3152422A1
Authority
EP
European Patent Office
Prior art keywords
liquid additive
ptc heating
heating element
conducting structure
housing
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Withdrawn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
EP15729110.5A
Other languages
German (de)
French (fr)
Inventor
Peter Bauer
Jan Hodgson
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
Continental Automotive GmbH
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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP3152422A1 publication Critical patent/EP3152422A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/18Exhaust 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
    • F01N3/20Exhaust 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
    • F01N3/2066Selective catalytic reduction [SCR]
    • F01N3/208Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/18Exhaust 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
    • F01N3/20Exhaust 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
    • F01N3/206Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/18Exhaust 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
    • F01N3/20Exhaust 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
    • F01N3/2066Selective catalytic reduction [SCR]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2550/00Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/05Systems for adding substances into exhaust
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/02Adding substances to exhaust gases the substance being ammonia or urea
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/10Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/10Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • F01N2610/105Control thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/14Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1406Storage means for substances, e.g. tanks or reservoirs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06Parameters used for exhaust control or diagnosing
    • F01N2900/18Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806Properties of reducing agent or dosing system
    • F01N2900/1811Temperature
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Definitions

  • the invention relates to a device for providing a liquid additive.
  • Devices for providing a liquid additive are used, for example, in the motor vehicle sector to supply a liquid additive to an exhaust gas treatment device for cleaning the exhaust gases of an internal combustion engine of the motor vehicle.
  • Exhaust treatment devices that use a liquid additive to purify exhaust gases are widely used.
  • An exhaust gas purification process which is particularly frequently carried out in such exhaust gas treatment devices is the selective catalytic reduction (SCR) process.
  • SCR selective catalytic reduction
  • nitrogen oxide compounds in the exhaust gas are reduced with the aid of a reducing agent.
  • ammonia is used as the reducing agent.
  • the exhaust gas treatment device typically has an SCR catalyst, at which the nitrogen oxide compounds in the exhaust gas are reduced by means of the ammonia.
  • Ammonia is usually not stored directly in motor vehicles, but stored in the form of a reducing agent precursor solution.
  • This reductant precursor solution is a liquid additive.
  • a particularly frequently used reducing agent precursor solution is urea-water solution.
  • a 32.5 percent urea-water solution is available under the trade name AdBlue®.
  • the invention relates to a device for providing a liquid additive which has at least one PTC heating element which is adapted to melt frozen fluid additive in the device, wherein the at least one PTC heating element of the device is accommodated on both sides by a two-part heat conduction structure a voltage source is connected to the two-part heat conduction structure so that electric current can be conducted from the one heat conduction structure on one side of the PTC heating element through the PTC heating element to the heat conduction structure on the other side of the PTC heating element.
  • the device is preferably used in a tank as a mounting unit.
  • the device preferably has a housing and is arranged on the tank bottom of the tank.
  • the device has a suction point at which liquid additive (in particular urea-water solution) can be removed from the tank.
  • the device preferably has a line connection to which a metering line for providing the liquid additive can be connected.
  • a channel runs from the suction point to the line connection through the device.
  • a pump is arranged, with which the liquid additive can be promoted.
  • the device has several PTC heating elements.
  • the PTC heating elements are connected with a heat-conducting structure to the housing of the tank. In the tank is located around the device around a start volume of liquid additive.
  • the PTC heating elements are configured to heat liquid additive in the starting volume through the housing of the device.
  • the heat conduction structure is preferably applied over a large area to the housing so that the liquid in the tank can be effectively heated by means of the at least one PTC heating element.
  • the PTC heating elements (and usually also the pump of the device) are supplied from a voltage source of the device via electrical conductors with electrical current and an electrical voltage.
  • a filter is optionally arranged, which limits the starting volume between the filter and the housing and the suction point obscured, so that the liquid additive is filtered during removal from the tank with the filter.
  • Outside the housing and outside of the filter is optionally arranged a further coarse filter, which can prevent damage to the filter.
  • the liquid additive inside the tank (outside the coarse filter) has a temperature. This temperature is an operating parameter of the device that can be taken into account in the implementation of the method.
  • connection of the at least one PTC heating element of the device to a heat-conducting structure of the device.
  • the at least one PTC heating element of the device is accommodated on both sides by a two-part heat conduction structure, so that the heat from the PTC heating element is transmitted as effectively as possible to the housing or to the liquid additive.
  • a voltage source is connected via electrical conductors to the two-part heat conduction structure so that the electrical current can be conducted from the one heat conduction structure on one side of the PTC heating element through the PTC heating element to the heat conduction structure on the other side of the PTC heating element.
  • the (two-part) heat conduction structure thus forms, at least in sections, electrical conductors for contacting the at least one PTC heating element.
  • spacer elements between the two parts of the two-part heat conduction structure are further arranged so that on the one hand, the individual parts of the two-part heat conduction, or the two bossleit Jardinen are electrically insulated from each other and on the other hand, a thermally conductive bridge between the two parts of the two-part heat conduction structure or at - exist the varnishleit Modellen.
  • the spacer elements thus ensure that the heat from the heat-conducting structure, which is arranged on the side facing away from the housing side of the PTC heating element, can be dissipated towards the housing.
  • the heat conduction structure is preferably made of metal and most preferably of aluminum, because aluminum has a high thermal conductivity with low weight.
  • the device is advantageous if the spacer elements form a thermally conductive bridge between the two parts of the two-part heat conduction structure.
  • a two-sided heat dissipation of the at least one PTC heating element to both parts of the two-part heat conduction structure is possible, wherein a heat exchange between the two parts of the heat conduction structure can occur.
  • This heat exchange allows a heat balance when the heat flow from the two parts of the heat conduction structure is different.
  • the device has a housing which is inserted in a tank for the liquid additive, wherein the housing is free of liquid additive and in the housing is the at least one PTC heating element and the two-part heat conduction structure.
  • the housing is insulated from the tank liquid-tight.
  • the device when the heat conduction structure is applied over a large area of the housing.
  • a (first) part of the heat conduction structure is preferably flat and abuts against an inner surface of the wall of the housing of the device.
  • the housing of the device is preferably cylindrically shaped. The inner surface thus preferably forms an inner peripheral surface.
  • a (second) part of the heat-conducting structure is preferably also flat and abuts against an upper wall of the housing of the device.
  • the second part of the heat-conducting structure preferably has arm-like sections, which are formed at least in sections parallel to the first part of the heat-conducting structure.
  • PTC heating elements are arranged between the arm-like sections of the second part of the heat-conducting structure and the first part of the heat-conducting structure.
  • thermally conductive connections are arranged between the first part of the heat structure and the second part of the heat-conducting structure.
  • thermally conductive compounds may be, for example, spacer elements which are arranged next to the PTC heating elements.
  • the device is also advantageous if a pump is arranged in the housing, which is connected to a suction point and a line connection via a channel, wherein liquid additive can be removed from the tank at the suction point and a feed line at the line connection can be connected to provide the liquid additive.
  • the housing despite the fact that a pump is disposed therein, is referred to as a "dry" housing, because in the housing itself, the liquid additive is not circulated freely and the housing is thus dry.
  • the liquid additive is within the housing in the channel and
  • a motor vehicle is proposed which comprises an internal combustion engine, an exhaust gas treatment device for cleaning the exhaust gases of the combustion engine and a fiction, contemporary device for providing a liquid additive for the exhaust treatment device has.
  • an SCR catalyst is preferably arranged, with which the method of selective catalytic reduction can be carried out.
  • the device described is preferably connected to a metering line.
  • This feed line leads to an adding device, with which the liquid additive can be supplied to the exhaust gas treatment device.
  • the adding device preferably has a nozzle which finely atomises the liquid additive in the exhaust gas treatment device (optionally with the aid of a pressure medium such as air) and / or an injector with which the liquid additive can be metered.
  • the injector may be, for example, an electrically opening and closing valve.
  • Fig. 1 a motor vehicle with a device
  • FIG. 2 shows a tank with a device
  • FIG. 3 a connection of a PTC heating element to a heat conduction structure
  • FIG. 4 shows another view of the connection according to FIG. 3, FIG.
  • FIG. 6 shows a three-dimensional representation of a two-part heat conduction structure
  • FIG. 7 is a detailed view of the tank of FIG. 2.
  • FIG. 1 shows a motor vehicle 16, comprising an internal combustion engine 17 and an exhaust gas treatment device 18 for cleaning the exhaust gases 19 of the combustion engine 17.
  • an SCR catalyst is provided as the exhaust gas purification component 21.
  • an adding device 20 is arranged, with which the liquid additive 3 of the exhaust gas purification component 21 can be supplied.
  • the adding device 20 is supplied by a device 2 via a metering line 22 with liquid additive 3 from a tank 23.
  • the liquid additive 3 has a temperature 34, which is here marked by way of example in the tank 23.
  • the device 2 is arranged in an environment (eg in the vicinity of the fuel tank of the motor vehicle), the environment having an ambient temperature 35, which is here marked outside the tank 23 by way of example.
  • Fig. 2 shows a tank 23 in a side view, in which a device 2 is used as a mounting unit.
  • the device 2 has a housing 26 and is arranged on the tank bottom 27 of the tank 23.
  • the device 2 has a suction point 29, at which liquid additive 3 (in particular urea-water solution) can be removed from the tank 23.
  • the device 2 has a line connection 28, to which a metering line 22 for providing the liquid additive 3 can be connected. From the suction point 29 to the line connection 28 extends through the device 2, a channel 36.
  • a pump 25 is arranged, with which the liquid additive 3 can be promoted.
  • the device 2 has a plurality of PTC heating elements 1.
  • the PTC heating elements 1 are connected to the housing 26 of the tank 23 with a heat-conducting structure 24.
  • the tank 23 is located around the device 2 around a start volume of liquid additive 3.
  • the PTC heating elements 1 are adapted to heat liquid additive 3 in the starting volume through the housing 26 of the device 2 therethrough.
  • the PTC heating elements 1 (and the pump 25) are supplied by a voltage source 5 of the device 2 via electrical conductors 4 with electric current 10 and an electrical voltage 31.
  • a filter 30 is optionally arranged, which limits the starting volume between the filter 30 and housing 26 and conceals the suction point 29, so that the liquid additive 3 in the removal from the tank
  • the liquid additive 3 within the tank 23 (outside of the coarse filter 32) has a temperature 34.
  • This temperature 34 is an operating parameter 14 of the device 2, which can be taken into account in the implementation of the method.
  • 3 shows an advantageous connection of a PTC heating element 1 to a heat-conducting structure 24. Shown is a wall portion of the housing 26 of the device 2 in a view from above (see side view in Fig. 2).
  • a PTC heating element 1 is accommodated on both sides by a two-part heat-conducting structure 24, so that the heat from the PTC heating element 1 is transmitted as effectively as possible to the housing 26 or to the liquid additive 3.
  • a voltage source 5 is via electrical conductors 4 with the two-part heat conduction structure
  • spacer elements 13 are arranged between the two-part heat-conducting structure 24, so that on the one hand the individual heat-conducting structures 24 are electrically insulated from one another and, on the other hand, a thermally conductive bridge exists between the heat-conducting structures 24. The spacer elements 13 thus ensure that the heat of the heat conduction structure 24, which is arranged on the side facing away from the housing 26 side of the PTC heating element 1, can be discharged towards the housing 26.
  • FIG. 4 shows a side view of the connection according to FIG. 4 along the section line V indicated in FIG. 4.
  • the heat-conducting structure 24 is arranged in the vicinity of the housing 26 within the device 2.
  • the housing 26 is connected to the tank bottom 27.
  • Fig. 5 shows a view from below into the housing 26 of a device 2.
  • a peripheral wall 6 of the housing 26 and an upper wall 7 of the housing 26 can be seen accordingly.
  • a first part 8 of the heat-conducting structure 24 is applied on the peripheral wall 6 .
  • On the upper wall 6 is a second part 9 of the heat conduction structure.
  • the second part 9 of the heat-conducting structure 24 has arms 10 which extend at least in sections parallel to the first part 8 of the heat-conducting structure 24.
  • PTC heating elements 1 are arranged between the arms 10 of the second part 9 and the first part 8 PTC heating elements 1 are arranged.
  • spacer elements 13 are arranged between the arms 10 of the second part 9 and the first part 8.
  • Also indicated in FIG. 5 are a pump 25 of the device and a channel 36, via which the pump 25 sucks in the liquid additive at a suction point 29.
  • FIG. 6 shows a three-dimensional view of the two-part heat-conducting structure 24 with a first part 8 and a second part 9.
  • FIG. 7 shows a detailed view of the tank 23 from FIG. 2 with a device 1. Going beyond the disclosure of FIG. 4, it can be seen here that the heat-conducting structure 24 is designed in two parts with a first part 8 and a second part 9.
  • the invention makes possible a particularly advantageous operation of a device for providing a liquid additive.
  • a functional test of the heat-conducting connection of PTC heating elements 1 to heat conducting structures 24 and / or housing 26 is possible.
  • it can be determined whether, if necessary, rework or repairs (possibly also a replacement of the device) are necessary.

Landscapes

  • 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)
  • Air-Conditioning For Vehicles (AREA)
  • Resistance Heating (AREA)
  • Surface Heating Bodies (AREA)

Abstract

The invention relates to a device (2) for providing a liquid additive (3), comprising at least one PTC heating element (1), which is designed to melt frozen liquid additive (3) in the device (2); wherein the at least one PTC heating element (1) of the device (2) is held on both sides by a two-part heat-conducting structure (24), wherein a voltage source (5) is connected to the two-part heat-conducting structure (24) in such a way that electric current can be conducted from the one heat-conducting structure (24) to a side of the PTC heating element (1) and through the PTC heating element to the other heat-conducting structure (24) on the other side of the PTC heating element (1).

Description

Vorrichtung zur Bereitstellung eines flüssigen Additivs  Device for providing a liquid additive
Die Erfindung betrifft eine Vorrichtung zur Bereitstellung eines flüssigen Additivs. Vorrichtungen zur Bereitstellung eines flüssigen Additivs finden beispiels- weise im Kraftfahrzeugbereich Anwendung, um einer Abgasbehandlungsvorrichtung zur Reinigung der Abgase einer Verbrennungskraftmaschine des Kraftfahrzeugs ein flüssiges Additiv zuzuführen. Abgasbehandlungsvorrichtungen, bei denen zur Reinigung von Abgasen ein flüssiges Additiv verwendet wird, sind weit verbreitet. Ein besonders häufig in derartigen Abgasbehandlungsvorrichtungen durchgeführtes Abgasreinigungsverfahren ist das Verfahren der selektiven kataly- tischen Reduktion (SCR- Verfahren; SCR = Selective Catalytic Reduction). Bei diesem Verfahren werden Stickstoffoxidverbindungen im Abgas unter Zuhilfenahme eines Reduktionsmittels reduziert. Als Reduktionsmittel wird dabei typischerweise Ammoniak verwendet. Die Abgasbehandlungsvorrichtung weist typi- scherweise einen SCR- Katalysator auf, an dem die Stickstoffoxidverbindungen im Abgas mit Hilfe des Ammoniaks reduziert werden. Ammoniak wird in Kraftfahrzeugen regelmäßig nicht direkt bevorratet, sondern in Form einer Reduktionsmittelvorläuferlösung gespeichert. Diese Reduktionsmittelvorläuferlösung ist ein flüssiges Additiv. Eine besonders häufig eingesetzte Reduktionsmittelvorläuferlö- sung ist Harnstoff-Wasser-Lösung. Eine 32,5-prozentige Harnstoff- Wasser- Lösung ist unter dem Handelsnamen AdBlue® erhältlich. The invention relates to a device for providing a liquid additive. Devices for providing a liquid additive are used, for example, in the motor vehicle sector to supply a liquid additive to an exhaust gas treatment device for cleaning the exhaust gases of an internal combustion engine of the motor vehicle. Exhaust treatment devices that use a liquid additive to purify exhaust gases are widely used. An exhaust gas purification process which is particularly frequently carried out in such exhaust gas treatment devices is the selective catalytic reduction (SCR) process. In this process, nitrogen oxide compounds in the exhaust gas are reduced with the aid of a reducing agent. Typically, ammonia is used as the reducing agent. The exhaust gas treatment device typically has an SCR catalyst, at which the nitrogen oxide compounds in the exhaust gas are reduced by means of the ammonia. Ammonia is usually not stored directly in motor vehicles, but stored in the form of a reducing agent precursor solution. This reductant precursor solution is a liquid additive. A particularly frequently used reducing agent precursor solution is urea-water solution. A 32.5 percent urea-water solution is available under the trade name AdBlue®.
Beim Betriebsstart einer solchen Vorrichtung ist problematisch, dass diese flüssigen Additive bei niedrigen Temperaturen einfrieren können. Die oben beschriebe- ne Harnstoff- Wasser- Lösung friert beispielsweise bei -11 °C ein. Derart niedrige Temperaturen können insbesondere während einer langen Stillstandsphase des Kraftfahrzeugs auftreten. Nach einer langen Stillstandsphase kann es passieren, dass das flüssige Additiv in der Vorrichtung vollständig eingefroren ist. Die Vorrichtung kann dann zunächst kein flüssiges Additiv bereitstellen. Es ist bekannt, dass Vorrichtungen zur Bereitstellung von flüssigem Additiv ein Heizungssystem aufweisen, um eingefrorenes flüssiges Additiv aufzuschmelzen, so dass zeitnah beim Betriebsstart eine Bereitstellung von flüssigem Additiv möglich ist. Als Heizung für derartige Vorrichtungen werden insbesondere PTC-Heizelemente (PTC = Positive Temperature Coefficient) vorgeschlagen. PTC-Heizelemente sind elektrische Heizelemente, die durch einen hindurchfließenden elektrischen Strom erwärmt werden. Sie haben die zusätzliche Eigenschaft, dass sich der elektrische Widerstand für den Strom bei steigender Temperatur erhöht. So wird erreicht, dass sich der elektrische Strom bei hohen Temperaturen automatisch verringert. Durch die Verringerung des elektrischen Stroms verringert sich auch die Heizleistung. Dies stellt einen automatischen Schutz eines PTC-Heizelementes gegen Überhitzen dar. When starting the operation of such a device is problematic that these liquid additives can freeze at low temperatures. For example, the urea-water solution described above freezes at -11 ° C. Such low temperatures can occur in particular during a long standstill phase of the motor vehicle. After a long standstill phase, it may happen that the liquid additive in the device is completely frozen. The device can then initially provide no liquid additive. It is known that devices for providing liquid additive have a heating system in order to melt frozen frozen additive, so that a provision of liquid additive is promptly possible at the start of operation. As a heater for such devices in particular PTC heating elements (PTC = Positive Temperature Coefficient) are proposed. PTC heating elements are electrical heating elements that are heated by a passing electrical current. They have the additional property that the electrical resistance for the current increases with increasing temperature. This ensures that the electrical current is automatically reduced at high temperatures. By reducing the electrical current and the heating power is reduced. This represents an automatic protection of a PTC heating element against overheating.
Bei diesen Vorrichtungen mit PTC-Heizelementen ist eine unzureichende Ableitung der Wärme von dem PTC-Heizelement problematisch, da sich das PTC- Heizelement in kurzer Zeit auf eine hohe Temperatur erwärmt und im Folgenden nur noch einen geringen elektrischen Strom leitet. Die Heizleistung wird damit in kurzer Zeit selbstregelnd begrenzt, so dass die gewünschte Heizfunktion in nur noch geringem Maß erfüllt wird. In these devices with PTC heating elements, an insufficient dissipation of heat from the PTC heating element is problematic because the PTC heating element heats up to a high temperature in a short time and subsequently conducts only a small electrical current. The heating power is thus limited in a short time self-regulating, so that the desired heating function is met in only a small degree.
Hiervon ausgehend ist es daher Aufgabe der hier vorliegenden Erfindung, die im Zusammenhang mit dem Stand der Technik geschilderten technischen Probleme zu lösen bzw. zumindest zu lindern. Es soll insbesondere eine besonders vorteilhafte Vorrichtung mit mindestens einem PTC-Heizelementes vorgeschlagen werden. Diese Aufgaben werden gelöst mit einer Vorrichtung gemäß den Merkmalen des Patentanspruchs 1. Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den abhängig formulierten Patentansprüchen angegeben. Die in den Patentansprüchen einzeln aufgeführten Merkmale sind in beliebiger, technologisch sinnvoller, Weise miteinander kombinierbar und können durch erläuternde Sachverhalte aus der Beschreibung ergänzt werden, wobei weitere Ausführungs Varianten der Erfindung aufgezeigt werden. Es wird eine Vorrichtung zur Bereitstellung eines flüssigen Additivs vorgeschlagen, die mindestens ein PTC-Heizelement aufweist, welches dazu eingerichtet ist, eingefrorenes flüssiges Additiv in der Vorrichtung aufzuschmelzen, wobei das mindestens eine PTC-Heizelement der Vorrichtung beidseitig von einer zweigeteilten Wärmeleitstruktur aufgenommen ist, wobei eine Spannungsquelle mit der zweigeteilten Wärmeleitstruktur derart verbunden ist, dass elektrischer Strom von der einen Wärmeleitstruktur auf einer Seite des PTC-Heizelements durch das PTC-Heizelement hindurch zur Wärmeleitstruktur auf der anderen Seite des PTC- Heizelements geleitet werden kann.. On this basis, it is therefore an object of the present invention to solve the problems described in connection with the prior art or at least alleviate. In particular, a particularly advantageous device with at least one PTC heating element is to be proposed. These objects are achieved with a device according to the features of claim 1. Further advantageous embodiments of the invention are specified in the dependent formulated claims. The features listed individually in the claims can be combined with one another in any technologically meaningful manner and can be supplemented by explanatory facts from the description, wherein further embodiments of the invention are shown. The invention relates to a device for providing a liquid additive which has at least one PTC heating element which is adapted to melt frozen fluid additive in the device, wherein the at least one PTC heating element of the device is accommodated on both sides by a two-part heat conduction structure a voltage source is connected to the two-part heat conduction structure so that electric current can be conducted from the one heat conduction structure on one side of the PTC heating element through the PTC heating element to the heat conduction structure on the other side of the PTC heating element.
Die Vorrichtung ist vorzugsweise in einen Tank als Einbaueinheit eingesetzt. Die Vorrichtung hat vorzugsweise ein Gehäuse und ist am Tankboden des Tanks angeordnet. Die Vorrichtung weist insbesondere eine Ansaugstelle auf, an der flüs- siges Additiv (insbesondere Harnstoff -Wasser- Lösung) aus dem Tank entnommen werden kann. Darüber hinaus weist die Vorrichtung vorzugsweise einen Leitungsanschluss auf, an welchen eine Zugabeleitung zur Bereitstellung des flüssigen Additivs angeschlossen werden kann. Üblicherweise verläuft von der Ansaugstelle zu dem Leitungsanschluss durch die Vorrichtung ein Kanal. In dem Kanal ist eine Pumpe angeordnet, mit der das flüssige Additiv gefördert werden kann. Die Vorrichtung weist mehrere PTC-Heizelemente auf. Die PTC-Heizelemente sind mit einer Wärmeleitstruktur an das Gehäuse des Tanks angebunden. In dem Tank befindet sich um die Vorrichtung herum ein Startvolumen von flüssigem Additiv. Die PTC-Heizelemente sind dazu eingerichtet, flüssiges Additiv in dem Startvo- lumen durch das Gehäuse der Vorrichtung hindurch aufzuheizen. Die Wärmeleitstruktur liegt dazu vorzugsweise großflächig an dem Gehäuse an, damit die Flüssigkeit in dem Tank mit Hilfe des mindestens einen PTC-Heizelementes effektiv aufgeheizt werden kann. Die PTC-Heizelemente (und üblicherweise auch die Pumpe der Vorrichtung) werden von einer Spannungsquelle der Vorrichtung über elektrische Leiter mit elektrischem Strom und einer elektrischen Spannung versorgt. Außen um das Gehäuse herum ist optional noch ein Filter angeordnet, der das Startvolumen zwischen Filter und Gehäuse begrenzt und die Ansaugstelle verdeckt, so dass das flüssige Additiv bei der Entnahme aus dem Tank mit dem Filter gefiltert wird. Außen um das Gehäuse und außerhalb des Filters ist optional ein weiterer Grobfilter angeordnet, der Beschädigungen des Filters verhindern kann. Das flüssige Additiv innerhalb des Tanks (außerhalb des Grobfilters) weist eine Temperatur auf. Diese Temperatur ist ein Betriebsparameter der Vorrichtung, der bei der Durchführung des Verfahrens berücksichtigt werden kann. The device is preferably used in a tank as a mounting unit. The device preferably has a housing and is arranged on the tank bottom of the tank. In particular, the device has a suction point at which liquid additive (in particular urea-water solution) can be removed from the tank. In addition, the device preferably has a line connection to which a metering line for providing the liquid additive can be connected. Usually, a channel runs from the suction point to the line connection through the device. In the channel, a pump is arranged, with which the liquid additive can be promoted. The device has several PTC heating elements. The PTC heating elements are connected with a heat-conducting structure to the housing of the tank. In the tank is located around the device around a start volume of liquid additive. The PTC heating elements are configured to heat liquid additive in the starting volume through the housing of the device. For this purpose, the heat conduction structure is preferably applied over a large area to the housing so that the liquid in the tank can be effectively heated by means of the at least one PTC heating element. The PTC heating elements (and usually also the pump of the device) are supplied from a voltage source of the device via electrical conductors with electrical current and an electrical voltage. Outside the housing, a filter is optionally arranged, which limits the starting volume between the filter and the housing and the suction point obscured, so that the liquid additive is filtered during removal from the tank with the filter. Outside the housing and outside of the filter is optionally arranged a further coarse filter, which can prevent damage to the filter. The liquid additive inside the tank (outside the coarse filter) has a temperature. This temperature is an operating parameter of the device that can be taken into account in the implementation of the method.
Besonders wichtig für die beschriebene Vorrichtung ist die Anbindung des mindestens einen PTC-Heizelementes der Vorrichtung an eine Wärmeleitstruktur der Vorrichtung. Particularly important for the device described is the connection of the at least one PTC heating element of the device to a heat-conducting structure of the device.
Das mindestens eine PTC-Heizelement der Vorrichtung ist beidseitig von einer zweigeteilten Wärmeleitstruktur aufgenommen, so dass die Wärme von dem PTC- Heizelement möglichst effektiv an das Gehäuse bzw. an das flüssige Additiv wei- tergeleitet wird. The at least one PTC heating element of the device is accommodated on both sides by a two-part heat conduction structure, so that the heat from the PTC heating element is transmitted as effectively as possible to the housing or to the liquid additive.
Vorzugsweise ist eine Spannungsquelle über elektrische Leiter mit der zweigeteilten Wärmeleitstruktur verbunden, so dass der elektrische Strom von der einen Wärmeleitstruktur auf der einen Seite des PTC-Heizelements durch das PTC- Heizelement hindurch zur Wärmeleitstruktur auf der anderen Seite des PTC- Heizelements geleitet werden kann. Die (zweiteilige) Wärmeleitstruktur bildet also zumindest abschnittsweise elektrische Leiter zur Kontaktierung des mindestens einen PTC-Heizelementes aus. Durch diese Anordnung der elektrischen Leiter wird eine effektive Nutzung des PTC-Materials des PTC-Heizelements mög- lieh und gleichzeitig eine effektive Wärmeableitung von dem mindestens einen PTC-Heizelement weg erreicht. Preferably, a voltage source is connected via electrical conductors to the two-part heat conduction structure so that the electrical current can be conducted from the one heat conduction structure on one side of the PTC heating element through the PTC heating element to the heat conduction structure on the other side of the PTC heating element. The (two-part) heat conduction structure thus forms, at least in sections, electrical conductors for contacting the at least one PTC heating element. By virtue of this arrangement of the electrical conductors, effective use of the PTC material of the PTC heating element is possible and, at the same time, effective heat dissipation away from the at least one PTC heating element is achieved.
Vorzugsweise sind weiterhin Distanzelemente zwischen den beiden Teilen der zweigeteilten Wärmeleitstruktur angeordnet, so dass einerseits die einzelnen Teile der zweiteiligen Wärmeleitstruktur, bzw. die beiden Wärmeleitstrukturen voneinander elektrisch isoliert sind und andererseits aber eine thermisch leitende Brücke zwischen den beiden Teilen der zweiteiligen Wärmeleitstruktur bzw. den bei- den Wärmeleitstrukturen existieren. Die Distanzelemente stellen damit sicher, dass auch die Wärme von der Wärmeleitstruktur, die auf der von dem Gehäuse abgewandten Seite des PTC-Heizelements angeordnet ist, hin zum Gehäuse abgeführt werden kann. Preferably, spacer elements between the two parts of the two-part heat conduction structure are further arranged so that on the one hand, the individual parts of the two-part heat conduction, or the two Wärmeleitstrukturen are electrically insulated from each other and on the other hand, a thermally conductive bridge between the two parts of the two-part heat conduction structure or at - exist the Wärmeleitstrukturen. The spacer elements thus ensure that the heat from the heat-conducting structure, which is arranged on the side facing away from the housing side of the PTC heating element, can be dissipated towards the housing.
Die Wärmeleitstruktur ist vorzugsweise aus Metall und ganz besonders bevorzugt aus Aluminium, weil Aluminium eine hohe Wärmeleitfähigkeit bei gleichzeitig geringem Gewicht hat. Vorteilhaft ist die Vorrichtung, wenn die Distanzelemente eine thermisch leitende Brücke zwischen den beiden Teilen der zweiteiligen Wärmeleitstruktur bilden. The heat conduction structure is preferably made of metal and most preferably of aluminum, because aluminum has a high thermal conductivity with low weight. The device is advantageous if the spacer elements form a thermally conductive bridge between the two parts of the two-part heat conduction structure.
Damit ist eine beidseitige Wärmeabfuhr von dem mindestens einen PTC- Heizelement zu beiden Teilen der zweiteiligen Wärmeleitstruktur möglich, wobei ein Wärmeaustausch zwischen den beiden Teilen der Wärmeleitstruktur auftreten kann. Dieser Wärmeaustausch ermöglicht einen Wärmeausgleich, wenn der Wär- meabfluss von den beiden Teilen der Wärmeleitstruktur unterschiedlich groß ist. Thus, a two-sided heat dissipation of the at least one PTC heating element to both parts of the two-part heat conduction structure is possible, wherein a heat exchange between the two parts of the heat conduction structure can occur. This heat exchange allows a heat balance when the heat flow from the two parts of the heat conduction structure is different.
Außerdem vorteilhaft ist es, wenn die Vorrichtung ein Gehäuse aufweist, welches in einem Tank für das flüssige Additiv eingesetzt ist, wobei das Gehäuse frei von flüssigem Additiv ist und sich in dem Gehäuse das mindestens eine PTC- Heizelement und die zweiteilige Wärmeleitstruktur befindet. Vorzugsweise ist das Gehäuse gegenüber dem Tank flüssigkeitsdicht isoliert. Außerdem vorteilhaft ist die Vorrichtung, wenn die Wärmeleitstruktur großflächig an dem Gehäuse anliegt. Ein (erster) Teil der Wärmeleitstruktur ist bevorzugt flächig ausgeführt und liegt an einer Innenfläche der Wandung des Gehäuses der Vorrichtung an. Das Gehäuse der Vorrichtung ist vorzugsweise zylindrisch geformt. Die Innenfläche bildet damit vorzugsweise eine Innenumfangsfläche. It is also advantageous if the device has a housing which is inserted in a tank for the liquid additive, wherein the housing is free of liquid additive and in the housing is the at least one PTC heating element and the two-part heat conduction structure. Preferably, the housing is insulated from the tank liquid-tight. Also advantageous is the device when the heat conduction structure is applied over a large area of the housing. A (first) part of the heat conduction structure is preferably flat and abuts against an inner surface of the wall of the housing of the device. The housing of the device is preferably cylindrically shaped. The inner surface thus preferably forms an inner peripheral surface.
Ein (zweiter) Teil der Wärmeleitstruktur ist vorzugsweise ebenfalls flächig ausgeführt und liegt an einer oberen Wandung des Gehäuses der Vorrichtung an. Der zweite Teil der Wärmeleitstruktur hat vorzugsweise armartige Abschnitte, die zumindest abschnittsweise parallel zu dem ersten Teil der Wärmeleitstruktur ausgebildet sind. PTC-Heizelemente sind zwischen den armartigen Abschnitten des zweiten Teils der Wärmeleitstruktur und dem ersten Teil der Wärmeleitstruktur angeordnet. A (second) part of the heat-conducting structure is preferably also flat and abuts against an upper wall of the housing of the device. Of the The second part of the heat-conducting structure preferably has arm-like sections, which are formed at least in sections parallel to the first part of the heat-conducting structure. PTC heating elements are arranged between the arm-like sections of the second part of the heat-conducting structure and the first part of the heat-conducting structure.
Eine Wärmeabgabe an das Gehäuse ist dabei sowohl über den ersten Teil der Wärmeleitstruktur als auch über den zweiten Teil der Wärmeleitstruktur möglich. Je nachdem, wie hoch der Füllstand des flüssigen Additivs im Tank ist, ist die obere Wandung des Gehäuses mit flüssigem Additiv benetzt oder nicht. Ein signifikanter Abfluss von Wärme über den zweiten Teil der Wärmeleitstruktur ist nur zu erwarten, wenn die obere Wandung mit flüssigem Additiv benetzt ist. Um die Wärme zwischen dem ersten Teil der Wärmeleitstruktur und dem zweiten Teil der Wärmeleitstruktur immer richtig zu verteilen, sind wärmeleitfähige Verbindungen zwischen dem ersten Teil der Wärmeleistruktur und dem zweiten Teil der Wärmeleitstruktur angeordnet. Diese wärmeleitfähigen Verbindungen können beispielsweise Distanzelemente sein, die neben den PTC-Heizelementen angeordnet sind. A heat transfer to the housing is possible both over the first part of the heat conduction structure and over the second part of the heat conduction structure. Depending on how high the level of the liquid additive in the tank is, the upper wall of the housing is wetted with liquid additive or not. A significant outflow of heat over the second part of the heat conduction structure is only to be expected if the upper wall is wetted with liquid additive. In order to always distribute the heat between the first part of the heat-conducting structure and the second part of the heat-conducting structure, thermally conductive connections are arranged between the first part of the heat structure and the second part of the heat-conducting structure. These thermally conductive compounds may be, for example, spacer elements which are arranged next to the PTC heating elements.
Außerdem vorteilhaft ist die Vorrichtung, wenn in dem Gehäuse eine Pumpe an- geordnet ist, die über einen Kanal mit einer Ansaugstelle und einem Leitungsan- schluss verbunden ist, wobei an der Ansaugstelle flüssiges Additiv aus dem Tank entnommen werden kann und an dem Leitungsanschluss eine Zugabeleitung zur Bereitstellung des flüssigen Additivs angeschlossen werden kann. Das Gehäuse wird trotz der Tatsache, dass darin eine Pumpe angeordnet ist, als „trockenes" Gehäuse bezeichnet, weil in dem Gehäuse selbst das flüssige Additiv nicht frei zirkuliert und das Gehäuse damit trocken ist. Das flüssige Additiv ist innerhalb des Gehäuses in dem Kanal und in der Pumpe geführt. Zudem wird ein Kraftfahrzeug vorgeschlagen, das eine Verbrennungskraftmaschine, eine Abgasbehandlungsvorrichtung zur Reinigung der Abgase der Ver- brennung skraftmaschine und eine erfindungs gemäße Vorrichtung zur Bereitstellung eines flüssigen Additivs für die Abgasbehandlungsvorrichtung aufweist. The device is also advantageous if a pump is arranged in the housing, which is connected to a suction point and a line connection via a channel, wherein liquid additive can be removed from the tank at the suction point and a feed line at the line connection can be connected to provide the liquid additive. The housing, despite the fact that a pump is disposed therein, is referred to as a "dry" housing, because in the housing itself, the liquid additive is not circulated freely and the housing is thus dry.The liquid additive is within the housing in the channel and In addition, a motor vehicle is proposed which comprises an internal combustion engine, an exhaust gas treatment device for cleaning the exhaust gases of the combustion engine and a fiction, contemporary device for providing a liquid additive for the exhaust treatment device has.
In der Abgasbehandlungsvorrichtung ist vorzugsweise ein SCR-Katalysator ange- ordnet, mit dem das Verfahren der selektiven katalytischen Reduktion durchgeführt werden kann. Die beschriebene Vorrichtung ist vorzugsweise an eine Zugabeleitung angeschlossen. Diese Zugabeleitung führt zu einer Zugabevorrichtung, mit der das flüssige Additiv der Abgasbehandlungsvorrichtung zugeführt werden kann. Die Zugabevorrichtung hat dazu vorzugsweise eine Düse, die das flüssige Additiv in der Abgasbehandlungsvorrichtung (ggf. mit Hilfe eines Druckmediums wie Luft) fein zerstäubt und/oder einen Injektor, mit dem das flüssige Additiv dosiert werden kann. Der Injektor kann beispielsweise ein elektrisch öffnendes und schließendes Ventil sein. Die Erfindung sowie das technische Umfeld werden nachfolgend anhand der Figuren näher erläutert. Die Figuren zeigen besonders bevorzugte Ausführungsbeispiele, auf die die Erfindung jedoch nicht begrenzt ist. Insbesondere ist darauf hinzuweisen, dass die Figuren und insbesondere die dargestellten Größen Verhältnisse nur schematisch sind. Es zeigen: In the exhaust gas treatment apparatus, an SCR catalyst is preferably arranged, with which the method of selective catalytic reduction can be carried out. The device described is preferably connected to a metering line. This feed line leads to an adding device, with which the liquid additive can be supplied to the exhaust gas treatment device. For this purpose, the adding device preferably has a nozzle which finely atomises the liquid additive in the exhaust gas treatment device (optionally with the aid of a pressure medium such as air) and / or an injector with which the liquid additive can be metered. The injector may be, for example, an electrically opening and closing valve. The invention and the technical environment will be explained in more detail with reference to FIGS. The figures show particularly preferred embodiments, to which the invention is not limited. In particular, it should be noted that the figures and in particular the magnitudes shown are only schematically. Show it:
Fig. 1: ein Kraftfahrzeug mit einer Vorrichtung; Fig. 1: a motor vehicle with a device;
Fig. 2: einen Tank mit einer Vorrichtung; Fig. 3: eine Anbindung eines PTC-Heizelementes an eine Wärmeleitstruktur; 2 shows a tank with a device; FIG. 3: a connection of a PTC heating element to a heat conduction structure; FIG.
Fig. 4: eine andere Ansicht der Anbindung gemäß Fig. 3,  4 shows another view of the connection according to FIG. 3, FIG.
Fig. 5: Eine Ansicht in das Gehäuse einer Vorrichtung von unten, 5 shows a view into the housing of a device from below,
Fig. 6: dreidimensionale Darstellung einer zweiteiligen Wärmeleitstruktur, und Fig. 7: eine detaillierte Ansicht des Tanks aus Fig. 2. 6 shows a three-dimensional representation of a two-part heat conduction structure, and FIG. 7 is a detailed view of the tank of FIG. 2. FIG.
Fig. 1 zeigt ein Kraftfahrzeug 16, aufweisend eine Verbrennungskraftmaschine 17 und eine Abgasbehandlungsvorrichtung 18 zur Reinigung der Abgase 19 der Verbrennung skraftmaschine 17. In der Abgasbehandlungsvorrichtung 18 ist ein SCR- Katalysator als Abgasreinigungskomponente 21 vorgesehen. An der Abgasbehandlung s Vorrichtung 18 ist eine Zugabevorrichtung 20 angeordnet, mit der das flüssige Additiv 3 der Abgasreinigungskomponente 21 zugeführt werden kann. Die Zugabevorrichtung 20 wird von einer Vorrichtung 2 über eine Zugabeleitung 22 mit flüssigem Additiv 3 aus einem Tank 23 versorgt. Das flüssige Additiv 3 weist eine Temperatur 34 auf, die hier beispielhaft in dem Tank 23 markiert ist. Die Vorrichtung 2 ist in einer Umgebung angeordnet (z. B. in der Nähe des Kraftstofftanks des Kraftfahrzeuges), wobei die Umgebung eine Umgebungstemperatur 35 aufweist, die hier beispielhaft außerhalb des Tanks 23 markiert ist. In der Vorrichtung 2 sind unter anderem PTC-Heizelemente (hier nicht gezeigt) angeordnet, die über elektrische Leiter 4 mit einer Spannungsquelle 5 verbunden sind. Die Vorrichtung 2 ist mit einer Überwachungseinheit 15 verbunden. Fig. 2 zeigt einen Tank 23 in einer Seitenansicht, in dem eine Vorrichtung 2 als Einbaueinheit eingesetzt ist. Die Vorrichtung 2 hat ein Gehäuse 26 und ist am Tankboden 27 des Tanks 23 angeordnet. Die Vorrichtung 2 weist eine Ansaugstelle 29 auf, an der flüssiges Additiv 3 (insbesondere Harnstoff- Wasser-Lösung) aus dem Tank 23 entnommen werden kann. Darüber hinaus weist die Vorrichtung 2 einen Leitungsanschluss 28 auf, an welchen eine Zugabeleitung 22 zur Bereitstellung des flüssigen Additivs 3 angeschlossen werden kann. Von der Ansaugstelle 29 zu dem Leitungsanschluss 28 verläuft durch die Vorrichtung 2 ein Kanal 36. In dem Kanal 36 ist eine Pumpe 25 angeordnet, mit der das flüssige Additiv 3 gefördert werden kann. Die Vorrichtung 2 weist mehrere PTC-Heizelemente 1 auf. Die PTC-Heizelemente 1 sind mit einer Wärmeleitstruktur 24 an das Gehäuse 26 des Tanks 23 angebunden. In dem Tank 23 befindet sich um die Vorrichtung 2 herum ein Startvolumen von flüssigem Additiv 3. Die PTC-Heizelemente 1 sind dazu eingerichtet, flüssiges Additiv 3 in dem Startvolumen durch das Gehäuse 26 der Vorrichtung 2 hindurch aufzuheizen. Die PTC-Heizelemente 1 (und die Pumpe 25) werden von einer Spannungsquelle 5 der Vorrichtung 2 über elektrische Leiter 4 mit elektrischem Strom 10 und einer elektrischen Spannung 31 versorgt. Außen um das Gehäuse 26 herum ist optional noch ein Filter 30 angeordnet, der das Startvolumen zwischen Filter 30 und Gehäuse 26 begrenzt und die Ansaugstelle 29 verdeckt, so dass das flüssige Additiv 3 bei der Entnahme aus dem Tank1 shows a motor vehicle 16, comprising an internal combustion engine 17 and an exhaust gas treatment device 18 for cleaning the exhaust gases 19 of the combustion engine 17. In the exhaust gas treatment device 18, an SCR catalyst is provided as the exhaust gas purification component 21. At the exhaust gas treatment s device 18, an adding device 20 is arranged, with which the liquid additive 3 of the exhaust gas purification component 21 can be supplied. The adding device 20 is supplied by a device 2 via a metering line 22 with liquid additive 3 from a tank 23. The liquid additive 3 has a temperature 34, which is here marked by way of example in the tank 23. The device 2 is arranged in an environment (eg in the vicinity of the fuel tank of the motor vehicle), the environment having an ambient temperature 35, which is here marked outside the tank 23 by way of example. In the device 2 PTC heating elements (not shown here) are inter alia arranged, which are connected via electrical conductors 4 to a voltage source 5. The device 2 is connected to a monitoring unit 15. Fig. 2 shows a tank 23 in a side view, in which a device 2 is used as a mounting unit. The device 2 has a housing 26 and is arranged on the tank bottom 27 of the tank 23. The device 2 has a suction point 29, at which liquid additive 3 (in particular urea-water solution) can be removed from the tank 23. In addition, the device 2 has a line connection 28, to which a metering line 22 for providing the liquid additive 3 can be connected. From the suction point 29 to the line connection 28 extends through the device 2, a channel 36. In the channel 36, a pump 25 is arranged, with which the liquid additive 3 can be promoted. The device 2 has a plurality of PTC heating elements 1. The PTC heating elements 1 are connected to the housing 26 of the tank 23 with a heat-conducting structure 24. In the tank 23 is located around the device 2 around a start volume of liquid additive 3. The PTC heating elements 1 are adapted to heat liquid additive 3 in the starting volume through the housing 26 of the device 2 therethrough. The PTC heating elements 1 (and the pump 25) are supplied by a voltage source 5 of the device 2 via electrical conductors 4 with electric current 10 and an electrical voltage 31. Outside the housing 26, a filter 30 is optionally arranged, which limits the starting volume between the filter 30 and housing 26 and conceals the suction point 29, so that the liquid additive 3 in the removal from the tank
23 mit dem Filter 30 gefiltert wird. Außen um das Gehäuse 26 und außerhalb des Filters 30 ist optional ein weiterer Grobfilter 32 angeordnet, der Beschädigungen des Filters 30 verhindern kann. Das flüssige Additiv 3 innerhalb des Tanks 23 (außerhalb des Grobfilters 32) weist eine Temperatur 34 auf. Diese Temperatur 34 ist ein Betriebsparameter 14 der Vorrichtung 2, der bei der Durchführung des Verfahrens berücksichtigt werden kann. Fig. 3 zeigt eine vorteilhafte Anbindung eines PTC-Heizelementes 1 an eine Wärmeleitstruktur 24. Dargestellt ist ein Wandabschnitt des Gehäuses 26 der Vorrichtung 2 in einer Ansicht von oben (vgl. Seitenansicht in Fig. 2). Ein PTC- Heizelement 1 ist beidseitig von einer zweigeteilten Wärmeleitstruktur 24 aufgenommen, so dass die Wärme von dem PTC-Heizelement 1 möglichst effektiv an das Gehäuse 26 bzw. an das flüssige Additiv 3 weitergeleitet wird. Eine Spannungsquelle 5 ist über elektrische Leiter 4 mit der zweigeteilten Wärmeleitstruktur23 is filtered with the filter 30. Outside the housing 26 and outside the filter 30, a further coarse filter 32 is optionally arranged, which can prevent damage to the filter 30. The liquid additive 3 within the tank 23 (outside of the coarse filter 32) has a temperature 34. This temperature 34 is an operating parameter 14 of the device 2, which can be taken into account in the implementation of the method. 3 shows an advantageous connection of a PTC heating element 1 to a heat-conducting structure 24. Shown is a wall portion of the housing 26 of the device 2 in a view from above (see side view in Fig. 2). A PTC heating element 1 is accommodated on both sides by a two-part heat-conducting structure 24, so that the heat from the PTC heating element 1 is transmitted as effectively as possible to the housing 26 or to the liquid additive 3. A voltage source 5 is via electrical conductors 4 with the two-part heat conduction structure
24 verbunden, so dass der elektrische Strom 10 von der einen Wärmeleitstruktur 24 auf der einen Seite des PTC-Heizelements 1 durch das PTC-Heizelement 1 hindurch zur Wärmeleitstruktur 24 auf der anderen Seite des PTC-Heizelements 1 geleitet wird. Durch diese Anordnung der elektrischen Leiter 4 wird eine effektive Nutzung des PTC-Materials des PTC-Heizelements 1 möglich und gleichzeitig eine effektive Wärmeableitung erreicht. Weiterhin sind Distanzelemente 13 zwischen der zweigeteilten Wärmeleitstruktur 24 angeordnet, so dass einerseits die einzelnen Wärmeleitstrukturen 24 voneinander elektrisch isoliert sind und ande- rerseits aber eine thermisch leitende Brücke zwischen den Wärmeleitstrukturen 24 existiert. Die Distanzelemente 13 stellen damit sicher, dass auch die Wärme von der Wärmeleitstruktur 24, die auf der von dem Gehäuse 26 abgewandten Seite des PTC-Heizelements 1 angeordnet ist, hin zum Gehäuse 26 abgeführt werden kann. 24, so that the electric current 10 is conducted from the one heat conducting structure 24 on one side of the PTC heating element 1 through the PTC heating element 1 to the heat conducting structure 24 on the other side of the PTC heating element 1. By this arrangement of the electrical conductors 4, an effective use of the PTC material of the PTC heating element 1 is possible and at the same time an effective heat dissipation is achieved. Furthermore, spacer elements 13 are arranged between the two-part heat-conducting structure 24, so that on the one hand the individual heat-conducting structures 24 are electrically insulated from one another and, on the other hand, a thermally conductive bridge exists between the heat-conducting structures 24. The spacer elements 13 thus ensure that the heat of the heat conduction structure 24, which is arranged on the side facing away from the housing 26 side of the PTC heating element 1, can be discharged towards the housing 26.
Fig. 4 zeigt eine Seitenansicht der Anbindung gemäß Fig. 4 entlang der in Fig. 4 angedeuteten Schnittlinie V. Die Wärmeleitstruktur 24 ist in der Nähe des Gehäuses 26 innerhalb der Vorrichtung 2 angeordnet. Das Gehäuse 26 ist an den Tankboden 27 angebunden. 4 shows a side view of the connection according to FIG. 4 along the section line V indicated in FIG. 4. The heat-conducting structure 24 is arranged in the vicinity of the housing 26 within the device 2. The housing 26 is connected to the tank bottom 27.
Fig. 5 zeigt eine Ansicht von unten in das Gehäuse 26 einer Vorrichtung 2. Eine Umfangswandung 6 des Gehäuses 26 und eine obere Wand 7 des Gehäuses 26 sind entsprechend zu erkennen. An der Umfangswand 6 liegt ein erster Teil 8 der Wärmeleitstruktur 24 an. An der oberen Wand 6 liegt ein zweiter Teil 9 der Wärmeleitstruktur an. Der zweite Teil 9 der Wärmeleitstruktur 24 hat Arme 10, die zumindest abschnittsweise parallel zum ersten Teil 8 der Wärmeleitstruktur 24 verlaufen. Zwischen den Armen 10 des zweiten Teils 9 und dem ersten Teil 8 sind PTC-Heizelemente 1 angeordnet. Zusätzlich sind zwischen den Armen 10 des zweiten Teils 9 und dem ersten Teil 8 Distanzelemente 13 angeordnet. In Fig. 5 ebenfalls angedeutet sind eine Pumpe 25 der Vorrichtung sowie ein Kanal 36, über welchen die Pumpe 25 das flüssige Additiv an einer Ansaugstelle 29 ansaugt. Fig. 5 shows a view from below into the housing 26 of a device 2. A peripheral wall 6 of the housing 26 and an upper wall 7 of the housing 26 can be seen accordingly. On the peripheral wall 6, a first part 8 of the heat-conducting structure 24 is applied. On the upper wall 6 is a second part 9 of the heat conduction structure. The second part 9 of the heat-conducting structure 24 has arms 10 which extend at least in sections parallel to the first part 8 of the heat-conducting structure 24. Between the arms 10 of the second part 9 and the first part 8 PTC heating elements 1 are arranged. In addition, spacer elements 13 are arranged between the arms 10 of the second part 9 and the first part 8. Also indicated in FIG. 5 are a pump 25 of the device and a channel 36, via which the pump 25 sucks in the liquid additive at a suction point 29.
Fig. 6 zeigt eine dreidimensionale Ansicht der zweiteiligen Wärmeleitstruktur 24 mit einem ersten Teil 8 und einem zweiten Teil 9. 6 shows a three-dimensional view of the two-part heat-conducting structure 24 with a first part 8 and a second part 9.
Fig. 7 zeigt eine detaillierte Ansicht des Tanks 23 aus Fig. 2 mit einer Vorrichtung 1. Über die Offenbarung der Fig. 4 hinausgehend ist hier zu erkennen, dass die Wärmeleitstruktur 24 zweiteilig mit einem ersten Teil 8 und einem zweiten Teil 9 ausgeführt ist. FIG. 7 shows a detailed view of the tank 23 from FIG. 2 with a device 1. Going beyond the disclosure of FIG. 4, it can be seen here that the heat-conducting structure 24 is designed in two parts with a first part 8 and a second part 9.
Durch die Erfindung wird ein besonders vorteilhafter Betrieb einer Vorrichtung zur Bereitstellung von flüssigem Additiv möglich. Insbesondere ist eine Funktionsprüfung der wärmeleitenden Anbindung von PTC-Heizelementen 1 an Wärmeleitstrukturen 24 und/oder Gehäuse 26 möglich. Dadurch kann festgestellt wer- den, ob ggf. Nachbesserungen oder Reparaturen (möglicherweise auch ein Ersetzen der Vorrichtung) notwendig sind. The invention makes possible a particularly advantageous operation of a device for providing a liquid additive. In particular, a functional test of the heat-conducting connection of PTC heating elements 1 to heat conducting structures 24 and / or housing 26 is possible. As a result, it can be determined whether, if necessary, rework or repairs (possibly also a replacement of the device) are necessary.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 PTC-Heizelement 1 PTC heating element
2 Vorrichtung  2 device
3 Flüssiges Additiv  3 Liquid additive
4 Elektrischer Leiter  4 electrical conductor
5 Spannungsquelle  5 voltage source
6 Umfangswand  6 peripheral wall
7 obere Wand  7 upper wall
8 erster Teil  8 first part
9 zweiter Teil  9 second part
10 Arm  10 arm
13 Distanzelement  13 spacer element
14 Betriebsparameter  14 operating parameters
15 Überwachungseinheit  15 monitoring unit
16 Kraftf ahrzeug  16 motor vehicles
17 Verbrennungskraftmaschine 17 internal combustion engine
18 Abgasbehandlungsvorrichtung18 exhaust treatment device
19 Abgas 19 exhaust
20 Zugabevorrichtung  20 adding device
21 Abgasreinigungskomponente 21 exhaust gas purification component
22 Zugabeleitung 22 feed line
23 Tank  23 tank
24 Wärmeleitstruktur  24 heat conduction structure
25 Pumpe  25 pump
26 Gehäuse  26 housing
27 Tankboden  27 tank bottom
28 Leitungsanschluss  28 pipe connection
29 Ansaugstelle  29 suction point
30 Filter Grobfilter 30 filters coarse filter
Temperatur temperature
Umgebungstemperatur Kanal Ambient temperature channel

Claims

Patentansprüche claims
Vorrichtung (2) zur Bereitstellung eines flüssigen Additivs (3), aufweisend mindestens ein PTC-Heizelement (1), welches dazu eingerichtet ist, eingefrorenes flüssiges Additiv (3) in der Vorrichtung (2) aufzuschmelzen, wobei das mindestens eine PTC-Heizelement (1) der Vorrichtung (2) beidseitig von einer zweigeteilten Wärmeleitstruktur (24) aufgenommen ist, wobei eine Spannungsquelle (5) mit der zweigeteilten Wärmeleitstruktur (24) derart verbunden ist, dass elektrischer Strom von der einen Wärmeleitstruktur (24) auf einer Seite des PTC-Heizelements (1) durch das PTC-Heizelement hindurch zur der anderen Wärmeleitstruktur (24) auf der anderen Seite des PTC-Heizelements (1) geleitet werden kann. Device (2) for providing a liquid additive (3), comprising at least one PTC heating element (1) which is adapted to melt frozen liquid additive (3) in the device (2), wherein the at least one PTC heating element ( 1) of the device (2) is accommodated on both sides by a two-part heat conducting structure (24), wherein a voltage source (5) is connected to the two-part heat conducting structure (24) in such a way that electric current from the one heat conducting structure (24) on one side of the PTC Heating element (1) can be passed through the PTC heating element to the other heat conducting structure (24) on the other side of the PTC heating element (1).
Vorrichtung (2) nach Anspruch 1, wobei die Spannungsquelle (5) über elektrische Leiter (4) mit der zweiteiligen Wärmeleitstruktur (24) verbunden ist. Device (2) according to claim 1, wherein the voltage source (5) via electrical conductors (4) is connected to the two-part heat conducting structure (24).
Vorrichtung (2) nach Anspruch 1 oder 2, wobei Distanzelemente (13) zwischen den beiden Teilen der zweiteiligen Wärmeleitstruktur (24) angeordnet sind, so dass die einzelnen Teile der zweiteiligen Wärmeleitstruktur (24) voneinander elektrisch isoliert sind. Device (2) according to claim 1 or 2, wherein spacer elements (13) are arranged between the two parts of the two-part heat conducting structure (24), so that the individual parts of the two-part heat conducting structure (24) are electrically insulated from each other.
Vorrichtung (2) nach Anspruch 3, wobei die Distanzelemente (13) eine thermisch leitende Brücke zwischen den beiden Teilen der zweiteiligen Wärmeleitstruktur (24) bilden. Device (2) according to claim 3, wherein the spacer elements (13) form a thermally conductive bridge between the two parts of the two-part heat conducting structure (24).
Vorrichtung (2) nach einem der vorhergehenden Ansprüche, wobei die Vorrichtung (2) ein Gehäuse (26) aufweist, welches in einem Tank (23) für das flüssige Additiv eingesetzt ist, welches frei von flüssigem Additiv (3) ist und in welchem sich das mindestens eine PTC-Heizelement (1) und die zweiteilige Wärmeleitstruktur (24) befindet. Vorrichtung (2) nach Anspruch 5, wobei die Wärmeleitstruktur (24) großflächig an dem Gehäuse (26) anliegt. Device (2) according to one of the preceding claims, wherein the device (2) comprises a housing (26) which is inserted in a tank (23) for the liquid additive, which is free of liquid additive (3) and in which the at least one PTC heating element (1) and the two-part heat conducting structure (24) is located. Device (2) according to claim 5, wherein the heat-conducting structure (24) over a large area on the housing (26).
Vorrichtung (2) nach Anspruch 5 oder 6, wobei in dem Gehäuse (26) eine Pumpe (25) angeordnet ist, die über einen Kanal (36) mit einer Ansaugstelle (29) und einem Leitungsanschluss (28) verbunden ist, wobei an der Ansaugstelle (29) flüssiges Additiv (3) aus dem Tank (23) entnommen werden kann und an dem Leitungsanschluss (28) eine Zugabeleitung (22) zur Bereitstellung des flüssigen Additivs (3) angeschlossen werden kann. Device (2) according to claim 5 or 6, wherein in the housing (26) a pump (25) is arranged, which is connected via a channel (36) with a suction point (29) and a line connection (28), wherein the Suction point (29) liquid additive (3) from the tank (23) can be removed and at the line connection (28) a metering line (22) for providing the liquid additive (3) can be connected.
Kraftfahrzeug (16), aufweisend eine Verbrennungskraftmaschine (17), eine Abgasbehandlungsvorrichtung (18) zur Reinigung der Abgase (19) der Verbrennung skraftmaschine (17) und eine Vorrichtung (2) nach einier der Patentansprüche 1 bis 7 zur Bereitstellung eines flüssigen Additivs (3) für die Abgasbehandlungsvorrichtung (18). Motor vehicle (16) comprising an internal combustion engine (17), an exhaust treatment device (18) for cleaning the exhaust gases (19) of the combustion engine (17) and a device (2) according to one of the claims 1 to 7 for providing a liquid additive (3 ) for the exhaust treatment device (18).
EP15729110.5A 2014-06-04 2015-06-02 Device for providing a liquid additive Withdrawn EP3152422A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014107863.2A DE102014107863A1 (en) 2014-06-04 2014-06-04 Method for functional testing of at least one PTC heating element
PCT/EP2015/062290 WO2015185568A1 (en) 2014-06-04 2015-06-02 Device for providing a liquid additive

Publications (1)

Publication Number Publication Date
EP3152422A1 true EP3152422A1 (en) 2017-04-12

Family

ID=53398060

Family Applications (2)

Application Number Title Priority Date Filing Date
EP15729371.3A Active EP3152423B1 (en) 2014-06-04 2015-06-02 Method for checking the function of at least one ptc heating element
EP15729110.5A Withdrawn EP3152422A1 (en) 2014-06-04 2015-06-02 Device for providing a liquid additive

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP15729371.3A Active EP3152423B1 (en) 2014-06-04 2015-06-02 Method for checking the function of at least one ptc heating element

Country Status (7)

Country Link
US (2) US20170107881A1 (en)
EP (2) EP3152423B1 (en)
JP (2) JP2017523337A (en)
KR (2) KR101902673B1 (en)
CN (2) CN106460614A (en)
DE (1) DE102014107863A1 (en)
WO (2) WO2015185569A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101647959B1 (en) * 2015-02-26 2016-08-23 현담산업 주식회사 Heating structure, manufacturing method thereof and pump module having the same
DE102016203496A1 (en) * 2016-03-03 2017-09-07 Röchling Automotive SE & Co. KG Electric heater with PTC element and electrical supply lines as Wärmeleitkörper and operating fluid tank with such a heater
DE102016209832B4 (en) * 2016-06-03 2022-09-29 Bayerische Motoren Werke Aktiengesellschaft Method and control unit for checking a dosing system for an additive that solidifies at low ambient temperatures, in particular for the exhaust gas of an internal combustion engine
KR101770376B1 (en) * 2016-09-21 2017-09-05 주식회사 코아비스 Urea solution pump module
DE102016121684A1 (en) * 2016-11-11 2018-05-17 Dbk David + Baader Gmbh Heating module for a melting tank, and melting tank with the heating module
DE102017217819A1 (en) * 2017-10-06 2019-04-11 Kautex Textron Gmbh & Co. Kg Liquid container for a motor vehicle
EP3728806B1 (en) * 2017-12-22 2022-10-19 Plastic Omnium Advanced Innovation And Research Vehicle suction system for liquids
DE102018216929A1 (en) * 2018-10-02 2020-04-02 Continental Automotive Gmbh Heating device for installation in a vehicle tank for reducing agent and vehicle tank
IT201900001745A1 (en) * 2019-02-06 2020-08-06 Eltek Spa Semi-finished product of electric heater device, electric heater device, and methods of realization
CN111894703A (en) * 2019-05-06 2020-11-06 罗伯特·博世有限公司 System for unfreezing exhaust gas treatment fluid of engine and liquid level monitoring method
CN114993384B (en) * 2022-07-13 2022-10-28 航电中和山东医疗技术有限公司 Heating pipe detection device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2341224A1 (en) * 2009-12-24 2011-07-06 DBK David + Baader GmbH Melting tank, heating module and tank system

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5311327A (en) * 1976-06-14 1978-02-01 Isago Miura Electric heater
JP2001029474A (en) 1999-07-21 2001-02-06 Central Uni Co Ltd Heating and humidifying inhaler
DE10234561A1 (en) * 2002-07-25 2004-02-19 Eichenauer Heizelemente Gmbh & Co. Kg Method and device for testing the function of an electrical heating device
US6901748B2 (en) * 2003-05-14 2005-06-07 Detroit Diesel Corporation Heater system for diesel engines having a selective catalytic reduction system
JP3751962B2 (en) * 2003-09-05 2006-03-08 日産ディーゼル工業株式会社 Engine exhaust purification system
DE102005037201A1 (en) * 2005-08-06 2007-02-22 Eichenauer Heizelemente Gmbh & Co. Kg heating system
DE202006010615U1 (en) * 2005-09-26 2006-10-26 Dbk David + Baader Gmbh A method for melting frozen motor vehicle liquids at low ambient temperatures has a starter tank provided with a heating system
DE102005050867A1 (en) * 2005-10-24 2007-04-26 Dbk David + Baader Gmbh Heatable connector
JP4407717B2 (en) * 2007-04-23 2010-02-03 株式会社デンソー Reducing gas generator, and solid reducing agent SCR system using the same.
FR2921104B1 (en) * 2007-09-14 2009-11-13 Inergy Automotive Systems Res METHOD FOR HEATING AN SCR SYSTEM USING RESISTIVE HEATING ELEMENTS
US20100050606A1 (en) * 2008-09-04 2010-03-04 Fulks Gary C Urea tank assembly
US20100078426A1 (en) 2008-10-01 2010-04-01 Bob Xiaobin Li Apparatus and method for maintaining a urea solution in a liquid state for treatment of diesel exhaust
DE102008056860A1 (en) * 2008-11-12 2010-05-20 Bayerische Motoren Werke Aktiengesellschaft Process for the selective catalytic reduction of nitrogen oxides in the exhaust gas of internal combustion engines
DE102008044271B4 (en) * 2008-12-02 2023-07-06 Robert Bosch Gmbh Procedure for checking the function of an electrical heating device
DE102009001736A1 (en) * 2009-03-23 2010-09-30 Robert Bosch Gmbh Method for operating an SCR catalytic converter
DE102010004612A1 (en) 2010-01-13 2011-07-14 Emitec Gesellschaft für Emissionstechnologie mbH, 53797 Device with a tank and a delivery unit for reducing agent
DE102010010528A1 (en) 2010-03-05 2011-09-08 Emitec Gesellschaft Für Emissionstechnologie Mbh Device for providing a liquid reducing agent
DE102010011151A1 (en) 2010-03-11 2011-09-15 Emitec Gesellschaft Für Emissionstechnologie Mbh Tank and method for determining the level in the tank
EP2375854B1 (en) * 2010-04-06 2015-12-02 Plastic Omnium Advanced Innovation and Research Heater for a vehicular fluid tank, motor vehicle comprising same, and method for heating a vehicular fluid tank
DE102010024021A1 (en) 2010-06-16 2011-12-22 Emitec Gesellschaft Für Emissionstechnologie Mbh Device for providing a reducing agent with system heating
US8875495B2 (en) 2010-08-06 2014-11-04 GM Global Technology Operations LLC Tank assembly and method
US8822887B2 (en) 2010-10-27 2014-09-02 Shaw Arrow Development, LLC Multi-mode heater for a diesel emission fluid tank
DE102011012441A1 (en) 2011-02-25 2012-08-30 Emitec Gesellschaft Für Emissionstechnologie Mbh Method for heating a conveyor system
EP2527609A1 (en) * 2011-05-23 2012-11-28 Inergy Automotive Systems Research (Société Anonyme) Additive delivery system and method for controlling said system
EP2549072A1 (en) * 2011-07-20 2013-01-23 Inergy Automotive Systems Research (Société Anonyme) Vehicular fluid injection system, controller and method for heating said fluid injection system
US20130239554A1 (en) 2012-03-19 2013-09-19 GM Global Technology Operations LLC Exhaust gas treatment system having a solid ammonia gas producing material
EP2650497A1 (en) * 2012-04-11 2013-10-16 TI Automotive Fuel Systems SAS A system for storing an additive solution for a vehicle engine
DE102012103520A1 (en) * 2012-04-20 2013-10-24 Eichenauer Heizelemente Gmbh & Co. Kg Method for checking operability of electrical heating device utilized in motor car for heating urea solution, involves applying testing voltage to electrical heating device, and evaluating electric property of heating device
DE102012217430A1 (en) 2012-09-26 2014-03-27 Robert Bosch Gmbh Heating device for heating supply tank that is utilized for supplying aqueous urea solution in diesel engine of vehicle, has multi-part housing for retaining multiple heating elements and partially made of stainless steel metal sheet
JP2014202094A (en) * 2013-04-02 2014-10-27 株式会社デンソー Control device of urea water addition device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2341224A1 (en) * 2009-12-24 2011-07-06 DBK David + Baader GmbH Melting tank, heating module and tank system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2015185568A1 *

Also Published As

Publication number Publication date
CN106460615A (en) 2017-02-22
KR20160140946A (en) 2016-12-07
JP2017516948A (en) 2017-06-22
KR20160145736A (en) 2016-12-20
EP3152423A1 (en) 2017-04-12
DE102014107863A1 (en) 2015-12-17
CN106460615B (en) 2019-06-04
WO2015185569A1 (en) 2015-12-10
WO2015185568A1 (en) 2015-12-10
US10590821B2 (en) 2020-03-17
US20170107881A1 (en) 2017-04-20
CN106460614A (en) 2017-02-22
US20170191392A1 (en) 2017-07-06
JP2017523337A (en) 2017-08-17
KR101902673B1 (en) 2018-09-28
JP6239158B2 (en) 2017-11-29
EP3152423B1 (en) 2018-12-05

Similar Documents

Publication Publication Date Title
WO2015185568A1 (en) Device for providing a liquid additive
DE102013102101A1 (en) A method for starting a device for providing a liquid additive
EP2299079A1 (en) Filter insert
WO2011086039A1 (en) Device having a tank and a delivery unit for reductants
DE102008057258A1 (en) Component carrier for a dosing system
DE102014107519A1 (en) Heater for a device for providing a liquid additive
EP2577012B1 (en) Heatable fluid removal device
EP2823164B1 (en) Device for providing liquid additive
WO2011032679A1 (en) Connecting device for a windshield wiper system
DE102010020200A1 (en) Tank for storing a fuel
EP3030764A1 (en) Method for producing a delivery module for installation into a tank
DE102014108074A1 (en) Heating module and tank system
EP1741888B1 (en) Storage tank of a motor vehicle
DE102011018482A1 (en) Media line, in particular for the transport of urea-water solutions
DE102012110585A1 (en) Apparatus for providing a liquid additive and method for heating the additive
DE102016013085A1 (en) Tank device for an internal combustion engine, in particular a motor vehicle
DE102012111919A1 (en) Method for operating a device for providing a liquid additive
DE102015119716A1 (en) System for cooling a system for selective catalytic reduction of a vehicle and method for controlling the same
DE102008051870A1 (en) filter element
DE102016113477A1 (en) Urea aqueous solution supply device
WO2019029881A1 (en) Tank device for exhaust gas post-treatment system
DE102017222301A1 (en) SCR dosing unit for conveying and providing a liquid exhaust gas cleaning additive
DE102019212882A1 (en) Heating device
DE102007034147A1 (en) combustion engine
DE102012223087A1 (en) Device for extracting freezable fluid i.e. aqueous urea solution, from fluid tank of combustion engine, has radiator including plate shaped ceramic support element, and filter element, which is arranged below radiator

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20170104

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HODGSON, JAN

Inventor name: BAUER, PETER

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20171019

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20180912

TPAC Observations by third parties

Free format text: ORIGINAL CODE: EPIDOSNTIPA

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

INTC Intention to grant announced (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20190409