WO2015153350A1 - Dispositif anti-obstruction pour appareil d'alimentation en fluide d'échappement diesel - Google Patents

Dispositif anti-obstruction pour appareil d'alimentation en fluide d'échappement diesel Download PDF

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Publication number
WO2015153350A1
WO2015153350A1 PCT/US2015/023042 US2015023042W WO2015153350A1 WO 2015153350 A1 WO2015153350 A1 WO 2015153350A1 US 2015023042 W US2015023042 W US 2015023042W WO 2015153350 A1 WO2015153350 A1 WO 2015153350A1
Authority
WO
WIPO (PCT)
Prior art keywords
dosing module
reservoir
def
inlet
feed line
Prior art date
Application number
PCT/US2015/023042
Other languages
English (en)
Inventor
JR. Harry Edward GORMAN
John Bartel
Original Assignee
Volvo Truck Corporation
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 Volvo Truck Corporation filed Critical Volvo Truck Corporation
Priority to US15/125,605 priority Critical patent/US20170002710A1/en
Priority to EP15774127.3A priority patent/EP3126645A4/fr
Publication of WO2015153350A1 publication Critical patent/WO2015153350A1/fr

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
    • F01N2610/00—Adding substances to exhaust gases
    • 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
    • F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1406—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
    • F01N2610/1433—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1493—Purging the reducing agent out of the conduits or nozzle
    • 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 Diesel Exhaust Fluid dosing apparatuses for vehicles, and more particularly to a device for alleviating clogging of the dosing apparatus.
  • Diesel Exhaust Fluid commonly referred to as AdBlue in Europe, is an aqueous urea solution of 32.5% high-purity urea and 67.5% deionized water.
  • DEF is consumed as a reactant in selective catalytic reduction (SCR) systems to lower the NOx content in the diesel exhaust emissions from diesel engines.
  • SCR selective catalytic reduction
  • DEF is typically carried on the vehicle in a supply tank and a dosing apparatus draws DEF from the tank and injects it into the exhaust upstream of an SCR catalyst.
  • the urea is converted via thermolysis and hydrolysis into ammonia. Inside the SCR catalyst body, the ammonia then reduces the nitrogen oxides (NOx) into water and nitrogen.
  • NOx nitrogen oxides
  • a dosing apparatus in addition to the supply tank, will typically include a supply module having a pump and a dosing module including a valve and injector.
  • urea Under certain conditions, in particular with exposure of DEF in the dosing module to exhaust gas heat, urea can crystallize out of the DEF solution and collect in the dosing module components, which can prevent free movement of the injector. Crystallized urea will rapidly dissolve on contact with DEF; however, when the injector is stuck, air in the supply line becomes a pressurized pocket that prevents DEF from flowing to the dosing module.
  • One solution known in the art is a dosing valve having a return line for continuous flow of DEF through the dosing module.
  • the invention proposes a solution to the clogging problem.
  • a reservoir is placed at the dosing valve inlet on a T-connection.
  • the reservoir provides a closed chamber to receive trapped air in the DEF supply line, allowing DEF to flow to the dosing module.
  • DEF contacts the crystallized urea causing the clog, the urea dissolves, freeing the injector so that normal action of the dosing module is restored.
  • the appended Figure shows a schematic view of a DEF dosing apparatus according to the invention.
  • the apparatus includes a DEF supply tank 10, a pump (or supply module) 20, and a dosing module 30.
  • a supply line 15 connects the pump inlet 22 to the supply tank 10.
  • a feed line 24 connects the pump outlet 26 to a T connector 40.
  • the T connector 40 has an inlet 42 to receive DEF from the pump 20, a first outlet 44 to deliver DEF to the dosing module 30 and a second outlet 46 connecting to a reservoir 50.
  • the reservoir 50 is a closed chamber, which may be a capped pipe, for example, or another vessel that can be connected in fluid communication with the line between the pump and dosing module to accept air that would otherwise be trapped in the line between the pump and the dosing module if urea has crystallized in the dosing module.
  • the apparatus facilitates the flow of DEF even when crystallized urea might cause a blockage.
  • the reservoir 50 may be placed vertically above the dosing module 30.

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)

Abstract

Cette invention concerne un appareil d'alimentation en fluide d'échappement diesel (FED) d'un système de traitement de gaz d'échappement de moteur, comprenant un réservoir pour recueillir l'air piégé si le module de dosage est obstrué par l'urée cristallisée. Le réservoir est disposé à l'entrée de la soupape de dosage sur un raccord en T. Le réservoir comprend une chambre fermée pour recevoir l'air piégé dans la ligne d'alimentation en FED, ce qui permet au FED de s'écouler vers le module de dosage. Quand le FED entre en contact avec l'urée cristallisée provoquant l'obstruction, l'urée se dissout de manière à libérer l'injecteur de sorte à rétablir le fonctionnement normal du module de dosage.
PCT/US2015/023042 2014-04-04 2015-03-27 Dispositif anti-obstruction pour appareil d'alimentation en fluide d'échappement diesel WO2015153350A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US15/125,605 US20170002710A1 (en) 2014-04-04 2015-03-27 Anti-clogging device for diesel exhaust fluid supply
EP15774127.3A EP3126645A4 (fr) 2014-04-04 2015-03-27 Dispositif anti-obstruction pour appareil d'alimentation en fluide d'échappement diesel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201461975152P 2014-04-04 2014-04-04
US61/975,152 2014-04-04

Publications (1)

Publication Number Publication Date
WO2015153350A1 true WO2015153350A1 (fr) 2015-10-08

Family

ID=54241140

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2015/023042 WO2015153350A1 (fr) 2014-04-04 2015-03-27 Dispositif anti-obstruction pour appareil d'alimentation en fluide d'échappement diesel

Country Status (3)

Country Link
US (1) US20170002710A1 (fr)
EP (1) EP3126645A4 (fr)
WO (1) WO2015153350A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3333386A1 (fr) 2016-12-12 2018-06-13 Perkins Engines Company Limited Système de dissolution de dépôt d'injecteur et procédé
WO2019048117A1 (fr) * 2017-09-11 2019-03-14 Robert Bosch Gmbh Pièce de raccord pour des conduites de fluide d'un système de post-traitement des gaz d'échappement
CN111120054A (zh) * 2019-12-30 2020-05-08 潍柴动力股份有限公司 一种减少发动机scr箱尿素结晶的控制方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080314027A1 (en) * 2005-02-16 2008-12-25 Imi Vision Limited Exhaust Gas Treatment
US20100326546A1 (en) * 2006-12-28 2010-12-30 Rainer Haeberer Device for metering a liquid reducing agent
US20130058833A1 (en) * 2010-05-17 2013-03-07 Takao Onodera Exhaust gas purification system
US8584707B2 (en) * 2009-04-22 2013-11-19 International Engine Intellectual Property Company, Llc Dosing manifold assembly

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006061734A1 (de) * 2006-12-28 2008-07-03 Robert Bosch Gmbh Vorrichtung zum Dosieren eines Reduktionsmittels
DE102009005790B4 (de) * 2009-01-22 2023-05-17 Albonair Gmbh Dosiersystem
EP2151559B1 (fr) * 2008-08-08 2011-04-06 Magneti Marelli S.p.A. Dispositif d'injection pour l'injection d'une substance réductrice dans un système d'échappement d'un moteur à combustion interne
DE102012208936A1 (de) * 2012-05-29 2013-12-05 Robert Bosch Gmbh Einspritzsystem, Abgasnachbehandlungseinrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080314027A1 (en) * 2005-02-16 2008-12-25 Imi Vision Limited Exhaust Gas Treatment
US20100326546A1 (en) * 2006-12-28 2010-12-30 Rainer Haeberer Device for metering a liquid reducing agent
US8584707B2 (en) * 2009-04-22 2013-11-19 International Engine Intellectual Property Company, Llc Dosing manifold assembly
US20130058833A1 (en) * 2010-05-17 2013-03-07 Takao Onodera Exhaust gas purification system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3126645A4 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3333386A1 (fr) 2016-12-12 2018-06-13 Perkins Engines Company Limited Système de dissolution de dépôt d'injecteur et procédé
US10400650B2 (en) 2016-12-12 2019-09-03 Perkins Engines Company Limited Injector deposit dissolution system and method
WO2019048117A1 (fr) * 2017-09-11 2019-03-14 Robert Bosch Gmbh Pièce de raccord pour des conduites de fluide d'un système de post-traitement des gaz d'échappement
US10968801B2 (en) 2017-09-11 2021-04-06 Robert Bosch Gmbh Connecting piece for fluid lines of an exhaust-gas aftertreatment system
CN111120054A (zh) * 2019-12-30 2020-05-08 潍柴动力股份有限公司 一种减少发动机scr箱尿素结晶的控制方法

Also Published As

Publication number Publication date
EP3126645A1 (fr) 2017-02-08
US20170002710A1 (en) 2017-01-05
EP3126645A4 (fr) 2018-01-17

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