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WO2009050948A1 - Controller of reducing agent supply unit and method of controlling the same - Google Patents

Controller of reducing agent supply unit and method of controlling the same Download PDF

Info

Publication number
WO2009050948A1
WO2009050948A1 PCT/JP2008/065641 JP2008065641W WO2009050948A1 WO 2009050948 A1 WO2009050948 A1 WO 2009050948A1 JP 2008065641 W JP2008065641 W JP 2008065641W WO 2009050948 A1 WO2009050948 A1 WO 2009050948A1
Authority
WO
WIPO (PCT)
Prior art keywords
reducing agent
supply unit
injection valve
exhaust
cooling water
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.)
Ceased
Application number
PCT/JP2008/065641
Other languages
French (fr)
Japanese (ja)
Inventor
Wataru Domon
Hiroyuki Igarashi
Eiji Nakao
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.)
Bosch Corp
Original Assignee
Bosch Corp
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 Bosch Corp filed Critical Bosch Corp
Priority to US12/738,414 priority Critical patent/US20100242439A1/en
Priority to CN200880112164A priority patent/CN101828011A/en
Publication of WO2009050948A1 publication Critical patent/WO2009050948A1/en
Anticipated expiration legal-status Critical
Priority to US13/738,050 priority patent/US20130118155A1/en
Ceased 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
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9431—Processes characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2067—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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
    • F01N2260/024—Exhaust treating devices having provisions not otherwise provided for for cooling the device using a liquid
    • 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
    • F01N2610/11—Adding substances to exhaust gases the substance or part of the dosing system being cooled
    • 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
    • F01N2610/1473—Overflow or return means for the substances, e.g. conduits or valves for the return path
    • 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
    • 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
    • F01N2900/1812—Flow rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/16—Outlet manifold
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Toxicology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Treating Waste Gases (AREA)

Abstract

A reducing agent supply unit that prevents any heat damaging of reducing agent injection valve and also prevents any crystallization of urea solution by excessive cooling of liquid reducing agent; and a method of controlling the same. There is disclosed a reducing agent supply unit for use in an exhaust purification apparatus capable of feeding by injection a urea solution as a reducing agent on the along-exhaust upstream side of a reduction catalyst disposed along an exhaust path of internal combustion engine so as to attain reduction purification of any nitrogen oxides contained in exhaust gas by the reduction catalyst, which reducing agent supply unit has a reducing agent injection valve fixed to an exhaust pipe on the along-exhaust upstream side of the reduction catalyst. The reducing agent supply unit comprises a cooling water circulation path for circulating at least a portion of the cooling water of the internal combustion engine in order to cool the reducing agent injection valve; flow rate control means for regulating the flow rate of cooling water through the cooling water circulation path; temperature detection means for detecting the temperature of the reducing agent injection valve; and control means for controlling the flow rate control means on the basis of the temperature of the reducing agent injection valve.
PCT/JP2008/065641 2007-10-19 2008-09-01 Controller of reducing agent supply unit and method of controlling the same Ceased WO2009050948A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/738,414 US20100242439A1 (en) 2007-10-19 2008-09-01 Control unit and control method for reductant supply device
CN200880112164A CN101828011A (en) 2007-10-19 2008-09-01 Control device and control method for reducing agent supply device
US13/738,050 US20130118155A1 (en) 2007-10-19 2013-01-10 Control unit and control method for reductant supply device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007272370A JP2009097479A (en) 2007-10-19 2007-10-19 Device and method for controlling reducing agent supplying device
JP2007-272370 2007-10-19

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/738,050 Continuation-In-Part US20130118155A1 (en) 2007-10-19 2013-01-10 Control unit and control method for reductant supply device

Publications (1)

Publication Number Publication Date
WO2009050948A1 true WO2009050948A1 (en) 2009-04-23

Family

ID=40567225

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/065641 Ceased WO2009050948A1 (en) 2007-10-19 2008-09-01 Controller of reducing agent supply unit and method of controlling the same

Country Status (4)

Country Link
US (1) US20100242439A1 (en)
JP (1) JP2009097479A (en)
CN (1) CN101828011A (en)
WO (1) WO2009050948A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
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EP2192280A1 (en) * 2008-12-01 2010-06-02 International Engine Intellectual Property LLC Thermal management of urea dosing components in an engine exhaust after-treatment system
US20110047971A1 (en) * 2009-08-25 2011-03-03 Gm Global Technology Operations, Inc. Dosing control systems and methods
WO2011162688A1 (en) * 2010-06-21 2011-12-29 Scania Cv Ab Method and device pertaining to cooling of dosing units of scr systems
WO2011162691A1 (en) * 2010-06-21 2011-12-29 Scania Cv Ab Method and device pertaining to cooling of dosing units of hc dosing systems for exhaust cleaning
CN102892985A (en) * 2010-05-17 2013-01-23 五十铃自动车株式会社 Scr system
US20130091829A1 (en) * 2010-06-21 2013-04-18 Andreas Liljestrand Method and device pertaining to limiting the temperature of a dosing unit in a scr system
CN103097679A (en) * 2010-07-21 2013-05-08 卡特彼勒公司 Dosing system having recirculation heating and vacuum draining
WO2014185520A1 (en) * 2014-05-16 2014-11-20 株式会社小松製作所 Utility vehicle, and control method for utility vehicle
JP2015152009A (en) * 2014-02-14 2015-08-24 ドイツ アクチェンゲゼルシャフト Method for the purification of diesel engine exhaust gases
WO2016076256A1 (en) * 2014-11-13 2016-05-19 いすゞ自動車株式会社 Urea water injection system and method for preventing crystallization in urea water injection device
WO2021106528A1 (en) * 2019-11-25 2021-06-03 いすゞ自動車株式会社 Reducing agent defrosting device of vehicle

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DE102008030756A1 (en) * 2008-06-27 2010-01-07 Emitec Gesellschaft Für Emissionstechnologie Mbh Method for operating a HWL dosing system
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JP5137135B2 (en) * 2008-12-11 2013-02-06 キャタピラー エス エー アール エル Reducing agent supply device for exhaust gas purification catalyst
US8561392B2 (en) * 2009-06-18 2013-10-22 Cummins Ip, Inc. Apparatus, system, and method for reductant line heating control
DE102009035940C5 (en) * 2009-08-03 2017-04-20 Cummins Ltd. SCR exhaust treatment device
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