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WO2009008150A1 - Exhaust purification apparatus - Google Patents

Exhaust purification apparatus Download PDF

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Publication number
WO2009008150A1
WO2009008150A1 PCT/JP2008/001797 JP2008001797W WO2009008150A1 WO 2009008150 A1 WO2009008150 A1 WO 2009008150A1 JP 2008001797 W JP2008001797 W JP 2008001797W WO 2009008150 A1 WO2009008150 A1 WO 2009008150A1
Authority
WO
WIPO (PCT)
Prior art keywords
nox
selective reduction
reduction catalyst
exhaust
urea
Prior art date
Application number
PCT/JP2008/001797
Other languages
French (fr)
Japanese (ja)
Inventor
Masahiko Yabe
Haruyuki Yokota
Takaharu Shimizu
Hiroyuki Ninomiya
Shinya Sato
Takeshi Kaneda
Shunsuke Toshioka
Satoshi Watanabe
Tomihisa Oda
Yutaka Tanai
Original Assignee
Hino Motors, Ltd.
Toyota Jidosha Kabushiki Kaisha
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 Hino Motors, Ltd., Toyota Jidosha Kabushiki Kaisha filed Critical Hino Motors, Ltd.
Publication of WO2009008150A1 publication Critical patent/WO2009008150A1/en

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
    • F01N3/2066—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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

Favorable NOx reducing effects can be exerted from an exhaust temperature lower than in the prior art without trouble at startup after long-time engine rest, etc. There is disclosed an exhaust purification apparatus having a selective reduction catalyst (5) disposed at a midstream area of exhaust pipe (4), the selective reduction catalyst capable of selective reaction of NOx with ammonia even in the presence of oxygen, which apparatus is adapted for addition of urea-water (6) as a reducing agent into the exhaust pipe (4) on upstream side of the selective reduction catalyst (5) so as to attain reduction purification of NOx. The exhaust pipe (4) upstream of the location of the addition of the urea-water (6) is provided with a particulate filter (10) equipped at its anterior stage with an oxidation catalyst (9). Between the particulate filter (10) and the location of the addition of the urea-water (6), there is provided a NOx adsorption catalyst (17) having the property of physically adsorb the NOx of exhaust gas (3) at temperatures lower than the activation lower limit temperature of the selective reduction catalyst (5) and releasing the adsorbed NOx at temperatures close to the activation lower limit temperature of the selective reduction catalyst (5).
PCT/JP2008/001797 2007-07-06 2008-07-04 Exhaust purification apparatus WO2009008150A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-178713 2007-07-06
JP2007178713A JP2009013932A (en) 2007-07-06 2007-07-06 Exhaust purification device

Publications (1)

Publication Number Publication Date
WO2009008150A1 true WO2009008150A1 (en) 2009-01-15

Family

ID=40228343

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/001797 WO2009008150A1 (en) 2007-07-06 2008-07-04 Exhaust purification apparatus

Country Status (2)

Country Link
JP (1) JP2009013932A (en)
WO (1) WO2009008150A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4711006B2 (en) * 2009-05-18 2011-06-29 三菱自動車工業株式会社 Exhaust purification device
JP5482436B2 (en) * 2009-06-12 2014-05-07 株式会社デンソー Engine waste heat control device
US8612117B2 (en) 2009-06-12 2013-12-17 Denso Corporation Apparatus for controlling the amount of waste heat of an engine
JP2011094482A (en) * 2009-10-27 2011-05-12 Hino Motors Ltd Exhaust gas post-processing device of diesel engine
JP6352115B2 (en) * 2014-08-29 2018-07-04 日野自動車株式会社 Exhaust purification system
WO2017145235A1 (en) 2016-02-22 2017-08-31 日野自動車 株式会社 Exhaust purification system
JP2019157739A (en) * 2018-03-12 2019-09-19 いすゞ自動車株式会社 Exhaust purifying device for internal combustion engine
JP2019190417A (en) * 2018-04-27 2019-10-31 いすゞ自動車株式会社 Exhaust emission control device and vehicle
DE102019210413B4 (en) 2019-07-15 2021-02-18 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Exhaust aftertreatment
DE102019119294A1 (en) * 2019-07-16 2021-01-21 Elringklinger Ag Shielding part

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0953442A (en) * 1995-08-14 1997-02-25 Toyota Motor Corp Exhaust gas purification method for diesel engine
JP2003065036A (en) * 2001-08-23 2003-03-05 Toyota Motor Corp Exhaust purification device for internal combustion engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0953442A (en) * 1995-08-14 1997-02-25 Toyota Motor Corp Exhaust gas purification method for diesel engine
JP2003065036A (en) * 2001-08-23 2003-03-05 Toyota Motor Corp Exhaust purification device for internal combustion engine

Also Published As

Publication number Publication date
JP2009013932A (en) 2009-01-22

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