US20170107881A1 - Device for providing a liquid additive - Google Patents

Device for providing a liquid additive Download PDF

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Publication number
US20170107881A1
US20170107881A1 US15/314,247 US201515314247A US2017107881A1 US 20170107881 A1 US20170107881 A1 US 20170107881A1 US 201515314247 A US201515314247 A US 201515314247A US 2017107881 A1 US2017107881 A1 US 2017107881A1
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United States
Prior art keywords
heat
conducting structure
ptc heating
liquid additive
heating element
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.)
Abandoned
Application number
US15/314,247
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English (en)
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
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Continental Automotive GmbH
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Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of US20170107881A1 publication Critical patent/US20170107881A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—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
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • 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
    • 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]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • 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
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/05—Systems for adding substances into exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • F01N2610/105—Control thereof
    • 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
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806—Properties of reducing agent or dosing system
    • F01N2900/1811—Temperature
    • 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

Definitions

  • the invention relates to a device for supplying a liquid additive.
  • Devices for providing a liquid additive are used for example in the automotive field for supplying a liquid additive to an exhaust-gas treatment device for purification of the exhaust gases of an internal combustion engine of the motor vehicle.
  • Exhaust-gas treatment devices in which a liquid additive is used for the purification of exhaust gases are widely used.
  • An exhaust-gas purification method particularly commonly implemented in such exhaust-gas treatment devices is the method of selective catalytic reduction (SCR method).
  • SCR method nitrogen oxide compounds in the exhaust gas are reduced with the aid of a reducing agent.
  • ammonia is typically used as reducing agent.
  • the exhaust-gas treatment device typically has an SCR catalytic converter on which the nitrogen oxide compounds in the exhaust gas are reduced with the aid of the ammonia.
  • Ammonia is generally stored in motor vehicles not directly but rather in the form of a reducing agent precursor solution.
  • the reducing agent precursor solution is a liquid additive.
  • One reducing agent precursor solution which is particularly frequently used is urea-water solution. A 32.5% urea-water solution is available under the trade name AdBlue®.
  • liquid additives can freeze at low temperatures.
  • the urea-water solution described above freezes at ⁇ 11° C.
  • Such low temperatures may be encountered in particular during a long standstill period of the motor vehicle. After a long standstill period, it may be the case that the liquid additive in the device has frozen completely.
  • the device then initially cannot provide any liquid additive. It is known for devices for providing liquid additive to have a heating system for melting frozen liquid additive, such that a provision of liquid additive is possible promptly after a start of operation.
  • PTC heating elements are electrical heating elements which are heated by an electrical current flowing through them. They have the additional characteristic that the electrical resistance for the current increases with rising temperature. It is thus achieved that the electrical current automatically decreases at high temperatures. As a result of the decrease of the electrical current, the heating power also decreases. This provides automatic protection of a PTC heating element against overheating.
  • a device for providing a liquid additive has at least one PTC heating element which is designed to melt frozen liquid additive in the device, wherein the at least one PTC heating element of the device is received, on both sides, by a two-part heat-conducting structure, wherein a voltage source is connected to the two-part heat-conducting structure such that electrical current can be conducted through the PTC heating element from one heat-conducting structure on one side of the PTC heating element to the heat-conducting structure on the other side of the PTC heating element.
  • the device is preferably inserted as an installation unit into a tank.
  • the device preferably has a housing, and is arranged on the tank base of the tank.
  • the device has, in particular, an intake point at which liquid additive (in particular urea-water solution) be extracted from the tank.
  • the device preferably has a line connector to which a metering line for providing the liquid additive can be connected.
  • a duct runs through the device from the intake point to the line connector.
  • a pump by means of which the liquid additive can be delivered.
  • the device has multiple PTC heating elements.
  • the PTC heating elements are connected by way of a heat-conducting structure to the housing of the tank.
  • a starting volume of liquid additive is situated in the tank around the device.
  • the PTC heating elements are designed to heat liquid additive in the starting volume through the housing of the device.
  • the heat-conducting structure bears against the housing preferably over a large area, in order that the liquid in the tank can be heated by way of the at least one PTC heating element in an effective manner.
  • the PTC heating elements (and normally also the pump of the device) are supplied with electrical current and an electrical voltage by a voltage source of the device via electrical conductors.
  • a filter which delimits the starting volume between filter and housing and covers the intake point such that the liquid additive, as it is extracted from the tank, is filtered by means of the filter.
  • a further coarse filter which may prevent damage to the filter.
  • the liquid additive within the tank (outside the coarse filter) has a temperature.
  • the temperature is an operating parameter of the device that may be taken into consideration in the execution 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 received, on both sides, by a two-part heat-conducting structure, such that the heat from the PTC heating element is conducted to the housing and to the liquid additive in as effective a manner as possible.
  • a voltage source is preferably connected to the two-part heat-conducting structure via electrical conductors, such that the electrical current may be conducted through the PTC heating element from one heat-conducting structure on one side of the PTC heating element to the heat-conducting structure on the other side of the PTC heating element.
  • the (two-part) heat-conducting structure thus forms, at least in sections, electrical conductors for the contacting of the at least one PTC heating element.
  • spacer elements are arranged between the two parts of the two-part heat-conducting structure, such that, firstly, the individual parts of the two-part heat-conducting structure, or the two heat-conducting structures, are electrically insulated with respect to one another, but secondly, a thermally conductive bridge exists between the two parts of the two-part heat-conducting structure or the two heat-conducting structures.
  • the spacer elements thus ensure that the heat from the heat-conducting structure arranged on that side of the PTC heating element which is averted from the housing can also be dissipated to the housing.
  • the heat-conducting structure is preferably composed of metal, and very particularly preferably composed of aluminum, because aluminum exhibits high thermal conductivity and, at the same time, a low weight.
  • the device is advantageous if the spacer elements form a thermally conductive bridge between the two parts of the two-part heat-conducting structure.
  • the device has a housing which is inserted in a tank for the liquid additive, wherein the housing is free from liquid additive and the at least one PTC heating element and the two-part heat-conducting structure are situated in the housing.
  • the housing is preferably insulated in liquid-tight fashion with respect to the tank.
  • the device is furthermore advantageous if the heat-conducting structure bears areally against the housing.
  • a (first) part of the heat-conducting structure is preferably of areal form and bears against an inner surface of the wall of the housing of the device.
  • the housing of the device is preferably of cylindrical form.
  • the inner surface thus preferably forms an inner circumferential surface.
  • a (second) part of the heat-conducting structure is preferably likewise of areal form and bears against an upper wall of the housing of the device.
  • the second part of the heat-conducting structure preferably has arm-like sections which, at least in sections, are formed 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.
  • a release of heat to the housing is in this case possible both via the first part of the heat-conducting structure and via the second part of the heat-conducting structure.
  • the upper wall of the housing is or is not wetted with liquid additive.
  • a significant flow-off of heat via the second part of the heat-conducting structure is to be expected only when the upper wall is wetted with liquid additive.
  • heat-conductive connections are arranged between the first part of the heat-conducting structure and the second part of the heat-conducting structure.
  • the heat-conductive connections may for example be spacer elements which are arranged adjacent to the PTC heating elements.
  • the device is furthermore advantageous if a pump is arranged in the housing, which pump is connected via a duct to an intake point and to a line connector, wherein liquid additive may be extracted from the tank at the intake point, and a metering line for providing the liquid additive may be connected to the line connector.
  • the housing is referred to as a “dry” housing, despite the fact that a pump is arranged therein, because, in the housing itself, the liquid additive does not circulate freely, and the housing is therefore dry. Within the housing, the liquid additive is conducted in the duct and in the pump.
  • a motor vehicle which has an internal combustion engine, an exhaust-gas treatment device for purification of the exhaust gases of the internal combustion engine, and a device according to the invention for providing a liquid additive for the exhaust-gas treatment device.
  • an SCR catalytic converter by means of which the method of selective catalytic reduction can be carried out.
  • the described device is preferably connected to a metering line.
  • the metering line leads to a metering device by means of which the liquid additive may be supplied to the exhaust-gas treatment device.
  • the metering device preferably has, for this purpose, a nozzle which finely atomizes the liquid additive in the exhaust-gas treatment device (if appropriate with the aid of a pressurized medium such as air) and/or an injector by means of which the liquid additive can be dosed.
  • the injector may for example be a valve which is opened and closed electrically.
  • FIG. 1 shows a motor vehicle having a device
  • FIG. 2 shows a tank having a device
  • FIG. 3 shows a connection of a PTC heating element to a heat-conducting structure
  • FIG. 4 shows another view of the connection as per FIG. 3 ,
  • FIG. 5 shows a view into the housing of a device from below
  • FIG. 6 is a three-dimensional illustration of a two-part heat-conducting structure
  • FIG. 7 shows a detail view of the tank from FIG. 2 .
  • FIG. 1 shows a motor vehicle 16 having an internal combustion engine 17 and having an exhaust-gas treatment device 18 for the purification of the exhaust gases 19 of the internal combustion engine 17 .
  • An SCR catalytic converter as exhaust-gas purification component 21 is provided in the exhaust-gas treatment device 18 .
  • a metering device 20 Provided on the exhaust-gas treatment device 18 is a metering device 20 by means of which the liquid additive 3 can be supplied to the exhaust-gas purification component 21 .
  • Liquid additive 3 is supplied from a tank 23 to the metering device 20 via a metering line 22 by a device 2 .
  • the liquid additive 3 has a temperature 34 , which is in this case marked by way of example in the tank 23 .
  • the device 2 is arranged in surroundings (e.g.
  • the device 2 in the vicinity of the fuel tank of the motor vehicle), wherein the surroundings have an ambient temperature 35 , which is in this case marked by way of example outside the tank 23 .
  • PTC heating elements (not shown here) 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, in a side view, a tank 23 into which a device 2 , as an installation unit 9 , has been inserted.
  • the device 2 has a housing 26 and is arranged on the tank base 27 of the tank 23 .
  • the device 2 has an intake point 29 at which liquid additive 3 (in particular urea-water solution) can be extracted from the tank 23 .
  • the device 2 has a line connector 28 to which a metering line 22 for providing the liquid additive 3 can be connected.
  • a duct 36 runs through the device 2 from the intake point 29 to the line connector 28 .
  • a pump 25 by means of which the liquid additive 3 can be delivered.
  • the device 2 has multiple PTC heating elements 1 .
  • the PTC heating elements 1 are connected by way of a heat-conducting structure 24 to the housing 26 of the tank 23 .
  • a starting volume of liquid additive 3 is situated in the tank 23 around the device 2 .
  • the PTC heating elements 1 are designed to heat liquid additive 3 in the starting volume through the housing 26 of the device 2 .
  • the PTC heating elements 1 (and the pump 25 ) are supplied with electrical current 10 and an electrical voltage 31 by a voltage source 5 of the device 2 via electrical conductors 4 .
  • a filter 30 Around the outside of the housing 26 there is optionally also arranged a filter 30 which delimits the starting volume between filter 30 and housing 26 and covers the intake point 29 such that the liquid additive 3 , as it is extracted from the tank 23 , is filtered by means of the filter 30 .
  • a further coarse filter 32 which may prevent damage to the filter 30 .
  • the liquid additive 3 within the tank 23 (outside the coarse filter 32 ) has a temperature 34 , where the temperature 34 is an operating parameter 14 of the device 2 that can be taken into consideration in the execution of the method.
  • FIG. 3 shows an advantageous connection of a PTC heating element 1 to a heat-conducting structure 24 .
  • the illustration shows a wall section of the housing 26 of the device 2 in a view from above (cf. the side view in FIG. 2 ).
  • a PTC heating element 1 is received, on both sides, by a two-part heat-conducting structure 24 , such that the heat from the PTC heating element 1 is conducted to the housing 26 and to the liquid additive 3 in as effective a manner as possible.
  • a voltage source 5 is connected via electrical conductors 4 to the two-part heat-conducting structure 24 , such that the electrical current 10 is conducted through the PTC heating element 1 from one heat-conducting structure 24 on one side of the PTC heating element 1 to the heat-conducting structure 24 on the other side of the PTC heating element 1 .
  • the electrical conductors 4 effective utilization of the PTC material of the PTC heating element 1 is made possible, and at the same time, an effective dissipation of heat is realized.
  • the spacer elements 13 are arranged between the two-part heat-conducting structure 24 , such that, firstly, the individual heat-conducting structures 24 are electrically insulated with respect to one another, but secondly, a thermally conductive bridge exists between the heat-conducting structures 24 .
  • the spacer elements 13 thus ensure that the heat from the heat-conducting structure 24 arranged on that side of the PTC heating element 1 which is averted from the housing 26 can also be dissipated to the housing 26 .
  • FIG. 4 shows a side view of the connection as per FIG. 3 along the section line V indicated in FIG. 3 .
  • 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 base 27 .
  • FIG. 5 shows a view into the housing 26 of a device 2 from below.
  • a circumferential wall 6 of the housing 26 and an upper wall 7 of the housing 26 are correspondingly visible.
  • a first part 8 of the heat-conducting structure 24 bears against the circumferential wall 6 .
  • a second part 9 of the heat-conducting structure bears against the upper wall 6 .
  • the second part 9 of the heat-conducting structure 24 has arms 10 which, at least in sections, run 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 .
  • spacer elements 13 are arranged between the arms 10 of the second part 9 and the first part 8 .
  • FIG. 6 shows a three-dimensional view of the two-part heat-conducting structure 24 with a first part 8 and with a second part 9 .
  • FIG. 7 shows a detailed view of the tank 23 from FIG. 2 with a device 1 . Additionally to the disclosure of FIG. 4 , it can be seen here that the heat-conducting structure 24 is of two-part form with a first part 8 and a second part 9 .
  • the invention permits particularly advantageous operation of a device for providing liquid additive.
  • functional testing of the heat-conducting connection of PTC heating elements 1 to heat-conducting structures 24 and/or housing 26 is possible. In this way, it can be detected whether possible amendments or repairs (possibly also a replacement of the device) are necessary.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Resistance Heating (AREA)
  • Surface Heating Bodies (AREA)
US15/314,247 2014-06-04 2015-06-02 Device for providing a liquid additive Abandoned US20170107881A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014107863.2 2014-06-04
DE102014107863.2A DE102014107863A1 (de) 2014-06-04 2014-06-04 Verfahren zur Funktionsprüfung mindestens eines PTC-Heizelementes
PCT/EP2015/062290 WO2015185568A1 (de) 2014-06-04 2015-06-02 Vorrichtung zur bereitstellung eines flüssigen additivs

Publications (1)

Publication Number Publication Date
US20170107881A1 true US20170107881A1 (en) 2017-04-20

Family

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US15/314,231 Active US10590821B2 (en) 2014-06-04 2015-06-02 Method for checking the function of at least one PTC heating element
US15/314,247 Abandoned US20170107881A1 (en) 2014-06-04 2015-06-02 Device for providing a liquid additive

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US15/314,231 Active US10590821B2 (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) US10590821B2 (ja)
EP (2) EP3152422A1 (ja)
JP (2) JP6239158B2 (ja)
KR (2) KR101902673B1 (ja)
CN (2) CN106460614A (ja)
DE (1) DE102014107863A1 (ja)
WO (2) WO2015185569A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180080361A1 (en) * 2016-09-21 2018-03-22 Coavis Urea Solution Pump Module
IT201900001745A1 (it) * 2019-02-06 2020-08-06 Eltek Spa Semilavorato di dispositivo riscaldatore elettrico, dispositivo riscaldatore elettrico, e metodi di realizzazione

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101647959B1 (ko) * 2015-02-26 2016-08-23 현담산업 주식회사 히팅 구조체, 그 제조 방법 및 이를 구비한 펌프 모듈
DE102016203496A1 (de) * 2016-03-03 2017-09-07 Röchling Automotive SE & Co. KG Elektrische Heizeinrichtung mit PTC-Element und elektrischen Versorgungsleitungen als Wärmeleitkörper und Betriebsflüssigkeitstank mit einer solchen Heizeinrichtung
DE102016209832B4 (de) * 2016-06-03 2022-09-29 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Steuereinheit zum Überprüfen eines Dosiersystems für einen bei niedrigen Umgebungstemperaturen erstarrenden Zusatzstoff insbesondere zum Abgas eines Verbrennungsmotors
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US20170191392A1 (en) 2017-07-06
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US10590821B2 (en) 2020-03-17
KR20160140946A (ko) 2016-12-07
KR20160145736A (ko) 2016-12-20
JP6239158B2 (ja) 2017-11-29
WO2015185568A1 (de) 2015-12-10
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DE102014107863A1 (de) 2015-12-17
JP2017523337A (ja) 2017-08-17

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