EP3737841A1 - Dispositif pour équilibrer la température d'un carburant/produit auxiliaire en mesure de se figer - Google Patents

Dispositif pour équilibrer la température d'un carburant/produit auxiliaire en mesure de se figer

Info

Publication number
EP3737841A1
EP3737841A1 EP18815968.5A EP18815968A EP3737841A1 EP 3737841 A1 EP3737841 A1 EP 3737841A1 EP 18815968 A EP18815968 A EP 18815968A EP 3737841 A1 EP3737841 A1 EP 3737841A1
Authority
EP
European Patent Office
Prior art keywords
encapsulation
intake
tempering
radiator
filter
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Withdrawn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
EP18815968.5A
Other languages
German (de)
English (en)
Inventor
Martin Kiontke
Mathias Schwarz
Sudeshwar Srihari
Jan Ruigrok van de Werve
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3737841A1 publication Critical patent/EP3737841A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • 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
    • F01N2310/00—Selection of sound absorbing or insulating material
    • 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
    • F01N2530/00—Selection of materials for tubes, chambers or housings
    • F01N2530/18—Plastics material, e.g. polyester resin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
    • 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
    • F01N2610/1426—Filtration means
    • 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
    • F01N2610/1486—Means to prevent the substance from freezing
    • 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 tempering a stored in a storage tank freezable operating / auxiliary material for
  • the conventional exhaust aftertreatment systems for self-igniting internal combustion engines operate on the principle of selective catalytic reduction (SCR), wherein it is used in the
  • Reducing agent is in most cases a urea-water solution, also known as Ad Blue®.
  • Ad Blue® a urea-water solution
  • Exhaust gas aftertreatment system comprises a storage tank in which the freezing reductant is stored.
  • the storage tank comprises a filter, optionally a filter cover and a tank heater as three separate components.
  • a Cyprusleitpin is additionally integrated, which extends into an intake passage.
  • the filter can be applied to a carrier, wherein the filter consists of the actual filter, a filter fleece and a filter cover, which can be joined together cohesively and thus form a suction channel for a delivery unit.
  • the freezing reductant in the storage tank and thawed in the intake This is associated with a storage tank
  • Tank heater attached locally to small surfaces on the filter cover to a
  • the tank heater is installed on small areas with the filter. This creates a separation between the heater of the tank heater and the intake, both of which are separated by insulating reducing agent. As a result, there is hardly any heat transfer from the tank heater to the frozen one
  • Defrosting agent thaws in the storage tank and then heat is released from this heated reducing agent to the Cyprusleitpin, which in turn conducts the heat to the intake and thawed in this frozen reducing agent.
  • This solution has a sluggish thawing behavior, furthermore, an additional element in the form of the heat conducting pin made of stainless steel is required, furthermore, in total, are relatively large thermal resistances that do not support the thawing behavior with frozen reducing agent. Furthermore, the production or the production of cohesive connections between the components is quite complicated.
  • a device for tempering a stored in the storage tank, freezable operating / auxiliary substance for exhaust aftertreatment in self-igniting internal combustion engines is proposed in which an encapsulation of a radiator within an overlap region forms a Ansaugkanalwand an intake passage.
  • Suction channel limited by the encapsulation of the radiator on the one hand and on the other hand either by a filter housing or a carrier on the storage tank.
  • the inventively proposed device for tempering a stored in a storage tank freezable operating / auxiliary material is designed such that the encapsulation of the radiator in the covering area has a reduced wall thickness.
  • Cover area is to be understood in the present context as the area over which the radiator extends parallel to the intake channel. In this area, the wall thickness of the encapsulation of the radiator, which at the same time the boundary wall of the
  • Intake channel forms, reduced, so the thermal resistance between the radiator and the intake passage can be further reduced, whereby a further acceleration of the thawing process can be achieved.
  • Umspritzungsmaterial such as HDPE and ETFE be replaced by a plastic material which is filled with glass fiber or with boron nitride to the thermal
  • thermoplastic materials are suitable, which have a very strong permeation barrier to the operating / auxiliary and its decomposition products and gaseous decomposition products such as NH 3 .
  • gaseous decomposition products such as NH 3 .
  • unfilled HDPE and ETFE materials and their derivatives are also preferable.
  • various filling materials for increasing the thermal conductivity such as, for example, boron nitride or aluminum oxide, can be mixed with the abovementioned materials.
  • the radiator surrounded by the encapsulation replaces a filter cover and thus makes an otherwise required additional component obsolete.
  • a filter fleece can be used, which extends substantially in the intake of the intake passage in the storage tank.
  • This filter fleece can be placed in such a way that it is wetted on its upper side and on its lower side by the freezable operating / auxiliary substance stored in the storage tank.
  • Radiator with an encapsulation of a plastic material covers substantially the entire intake passage as well as lying in front of the intake passage intake in the storage tank. Due to the special geometric shape of the tank heater in flat design, thus relatively large areas in the storage tank in the region of the intake and in this upstream intake can be heated, which is done in particular at the same time, thereby taking into account the reduced thermal resistance compared to the previous solutions a clear achieve faster thawing behavior of the freezable operating / auxiliary substance at temperatures below -11 ° C.
  • the invention also relates to the use of the device for tempering a stored in a storage tank freezable Operating / auxiliary substance for exhaust aftertreatment with self-igniting
  • the inventively proposed device for tempering a freezable operating / auxiliary substance in exhaust aftertreatment systems is characterized in that by the shape of the radiator, including its encapsulation, this component as a replacement of a previously used
  • Insert filter cover a component can be saved, as well as the heat-conducting pin used in previous solutions, which is made of stainless steel, represents a particularly expensive component. Due to the reduction of the thermal resistances between the heater and the intake channel with a corresponding formation of the encapsulation in the smallest possible wall thickness, by the inventively proposed device is a much faster thawing frozen operating / auxiliary both in the lower region of the storage tank and in particular in the intake duct the delivery unit - upstream upstream, reach. Compared with the prior art solutions, the thermal resistance between the heater and the intake duct is reduced and confined to a wall of plastic material.
  • joints such as, for example, welding interfaces, can be dispensed with.
  • the proposed solution according to the invention not only reduces the thermal resistance in the sense of heat conduction, but also the undesired cooling of the operating / auxiliary substance
  • the solution proposed according to the invention offers a possibility of combination of filter and heating, since the filter fleece is integrated into the heater. This results in a further reduction of the thermal resistance chain in the filter interior, also can be a space reduction achieved by elimination of air gaps, which on the other hand allows for mounting margin.
  • the inventively proposed solution is a simplification of the assembly with combined filter and heating and an associated
  • FIG. 1 shows a configuration of a heater and an intake duct
  • FIG. 3 shows a plan view of a device, wherein the flat-body radiator is not shown
  • FIG. 4 shows a section through the device according to FIG. 3 in accordance with FIG.
  • Figure 3 illustrated sectional course IV - IV and Figure 5 is the setting in the proposed solution thermal resistance between the temperature of the heater and the temperature of the intake passage.
  • FIG. 1 The illustration according to Figure 1 is a storage tank 10 can be seen in which a freezable operating / auxiliary material 12, in which it is preferably a
  • an intake channel 28 is preceded by a filter 14.
  • the filter 14 may be received on a carrier 16 and include a filter fabric 18.
  • Above the filter 14 is a radiator / heat sink 20 which is enclosed by an encapsulation 22, which is usually made of a plastic material.
  • a bathleitpin 24 located in a filter cover 26 a bathleitpin 24, which is made for example of stainless steel.
  • a delivery unit inlet 30 extends to a not shown in Figure 1
  • thermal resistances there are a first thermal resistance 38 of the encapsulation and a second thermal resistance 40 between the T heater , 36 and the temperature 48, T intake duct , prevailing in the intake duct , the second thermal resistor 40 being particularly critical is, as defined at best by the operational / excipient and in the worst case at low
  • the second thermal resistor 40 increases significantly.
  • dynamic influences such as the movement of the operating / auxiliary material (sloshing movements) come to fruition, which represent a constant loss of energy by flowing away of the heated operating / auxiliary material.
  • a further thermal resistance 42 is given by the plantetpin 24.
  • a second thermal resistance 46 also due to the encapsulation 22, and a thermal resistance 46, which is caused by the presence of the filter cover 26. variants
  • FIG. 3 shows a partial view of a device proposed according to the invention for controlling the temperature of a freezable operating / auxiliary substance 12 stored in a storage tank 10.
  • a heating element 56 essentially flat, covers the components shown in FIG. not shown.
  • the filter fleece 18 enclosed by a filter edge 54 extends in the suction region 72 (cf. illustration according to FIG. 4) in a sickle-shaped manner in front of the intake channel 28.
  • From the intake passage 28 extends perpendicular to the plane of FIG 3 of the feed unit inlet 30.
  • Reference numerals 74 and 76 respectively denote first and second cohesive joints, as connecting points 62, 64, see Figure 4, between the actual radiator 56 in flat construction or whose encapsulation 22 and the other components of the storage tank serve.
  • FIG. 4 shows a section through the invention proposed
  • the radiator 56 formed in a flat construction is surrounded by an encapsulation 22, which is usually made of plastic material.
  • the encapsulation 22 has several functions. On the one hand, the encapsulation 22 of the flat-design radiator 56 serves to encase and protect the
  • Radiator 56 against the surrounding medium i. As can be seen from FIG. 4, the radiator 56, which is surrounded by the encapsulation 22 and has a flat construction, is in contact with the radiator
  • Connecting points 62, 64 which are designed as cohesive joints 74, 76, above the intake duct 28 and above the filter fleece 18 attached.
  • the trained in flat design radiator 56 is such that the radiator 56 and the encapsulation 22 along a
  • the trained radiator 56 serves as intake passage wall 50.
  • the encapsulation 22 in the region in which the intake duct wall of the intake duct 28 forms can be embodied in a reduced wall thickness 52.
  • the self-adjusting thermal resistance 70 during heat transfer from the heater 56, the trapped in the intake duct 28 frozen operating / auxiliary material 12 is further reduced.
  • the geometry of the encapsulation or the radiator is also such that it still covers a suction area 72.
  • Intake area 72 via which the operating / auxiliary substance 12 stored in the tank flows to the filter fleece 18, is located on its upper side 66.
  • the filter fleece 18 is stabilized by the filter edge 54 from its upper side 66 also its bottom 68, wetted. Due to the selected geometry of the flat body formed radiator 56 and the surrounding encapsulation 22, and the intake portion 72, which is connected upstream of the intake passage 28 in the storage tank, can be heated.
  • Reference numeral 60 designates a feed curvature formed in the intake passage 28, which extends from the filter fleece 18 to the section of the intake passage 28, within which the encapsulation 22 of the flat construction
  • FIG. 5 shows a thermal equivalent diagram, according to which only the thermal resistance 70 of the encapsulation 22 is to be overcome between T heater 36 of the flat-type radiator 56 and the intake duct temperature 48. This is, as a comparison with the illustration of Figure 2 shows, in

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)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un dispositif permettant d'équilibrer la température d'un carburant/produit auxiliaire en mesure de se figer, stocké dans un réservoir (10), à des fins de post-traitement de gaz d'échappement, dans le cas de moteurs à combustion interne à auto-allumage. Un surmoulage (22) d'un corps chauffant (56) constitue, à l'intérieur d'une zone de recouvrement (58), une paroi de tuyau d'échappement (50) d'un tuyau d'échappement (28).
EP18815968.5A 2018-01-11 2018-11-30 Dispositif pour équilibrer la température d'un carburant/produit auxiliaire en mesure de se figer Withdrawn EP3737841A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018200317.3A DE102018200317A1 (de) 2018-01-11 2018-01-11 Vorrichtung zum Temperieren eines gefrierfähigen Betriebs-/Hilfsstoffes
PCT/EP2018/083096 WO2019137690A1 (fr) 2018-01-11 2018-11-30 Dispositif pour équilibrer la température d'un carburant/produit auxiliaire en mesure de se figer

Publications (1)

Publication Number Publication Date
EP3737841A1 true EP3737841A1 (fr) 2020-11-18

Family

ID=64664240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18815968.5A Withdrawn EP3737841A1 (fr) 2018-01-11 2018-11-30 Dispositif pour équilibrer la température d'un carburant/produit auxiliaire en mesure de se figer

Country Status (6)

Country Link
US (1) US20210062702A1 (fr)
EP (1) EP3737841A1 (fr)
KR (1) KR20200105699A (fr)
CN (1) CN111836949A (fr)
DE (1) DE102018200317A1 (fr)
WO (1) WO2019137690A1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7836684B2 (en) * 2005-06-04 2010-11-23 Eichenauer Heizelemente Gmbh & Co. Kg Urea supply system for a waste gas cleaning catalyst and heating insert suitable therefor
DE102006027487A1 (de) * 2005-09-12 2007-03-15 Robert Bosch Gmbh Fahrzeugtank für ein flüssiges Reduktionsmittel, insbesondere für eine Harnstofflösung
KR20090026285A (ko) * 2006-06-08 2009-03-12 이너지 오토모티브 시스템즈 리서치 (소시에떼 아노님) 엔진 배기 가스 첨가제의 저장 시스템
DE102009046954A1 (de) * 2009-11-23 2011-05-26 Robert Bosch Gmbh Modulkonzept für die Komponenten eines Tanks zur Bevorratung eines Reduktionsmittels
DE102010062333A1 (de) * 2010-12-02 2012-06-06 Robert Bosch Gmbh Vorrichtung zur Versorgung eines Abgasnachbehandlungssystems mit einem Reduktionsmittel
DE102010062982A1 (de) * 2010-12-14 2012-06-14 Robert Bosch Gmbh Tankeinbaumodul, Flüssigkeitstank
DE102011006105A1 (de) * 2011-03-25 2012-09-27 Robert Bosch Gmbh Funktionseinheit für einen Reduktionsmittel-Vorratstank sowie Reduktionsmittel-Vorratstank
DE102012108273A1 (de) * 2012-09-06 2014-03-06 Emitec Denmark A/S Kunststofftank für eine Betriebsflüssigkeit
DE102013217333A1 (de) * 2012-11-22 2014-05-22 Robert Bosch Gmbh Im-Tank-Filter und Filtermedium hierfür
DE102016207717A1 (de) * 2016-05-04 2017-11-09 Robert Bosch Gmbh Vorratstank zur Bevorratung eines gefrierfähigen Betriebs- oder Hilfsstoffs

Also Published As

Publication number Publication date
KR20200105699A (ko) 2020-09-08
WO2019137690A1 (fr) 2019-07-18
DE102018200317A1 (de) 2019-07-11
CN111836949A (zh) 2020-10-27
US20210062702A1 (en) 2021-03-04

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