US20140134062A1 - Exhaust gas purification system of vehicle - Google Patents

Exhaust gas purification system of vehicle Download PDF

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Publication number
US20140134062A1
US20140134062A1 US14/012,455 US201314012455A US2014134062A1 US 20140134062 A1 US20140134062 A1 US 20140134062A1 US 201314012455 A US201314012455 A US 201314012455A US 2014134062 A1 US2014134062 A1 US 2014134062A1
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US
United States
Prior art keywords
catalyst
exhaust gas
dpf
scr
purification system
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
US14/012,455
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English (en)
Inventor
Choong Il Kwon
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.)
Hyundai Motor Co
Kia Corp
Original Assignee
Hyundai Motor Co
Kia Motors 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 Hyundai Motor Co, Kia Motors Corp filed Critical Hyundai Motor Co
Assigned to HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION reassignment HYUNDAI MOTOR COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KWON, CHOONG IL
Publication of US20140134062A1 publication Critical patent/US20140134062A1/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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • 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 ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 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
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
    • F01N2510/0682—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings having a discontinuous, uneven or partially overlapping coating of catalytic material, e.g. higher amount of material upstream than downstream or vice versa
    • 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 present invention relates to an exhaust system for a vehicle, and more particularly, to an exhaust gas purification system capable of reducing pollutants in exhaust gas.
  • an exhaust system of an engine includes an exhaust gas aftertreatment apparatus such as a DOC (diesel oxidation catalyst), a DPF (diesel particulate matter filter), a SCR (selective catalyst reduction), a LNT (lean NOx trap), and the like in order to reduce carbon monoxide (CO), hydrocarbon (HC), particulate matters, nitrogen oxide (NOx), and the like, which are pollutants contained in exhaust gas.
  • an exhaust gas aftertreatment apparatus such as a DOC (diesel oxidation catalyst), a DPF (diesel particulate matter filter), a SCR (selective catalyst reduction), a LNT (lean NOx trap), and the like in order to reduce carbon monoxide (CO), hydrocarbon (HC), particulate matters, nitrogen oxide (NOx), and the like, which are pollutants contained in exhaust gas.
  • DOC diesel oxidation catalyst
  • DPF diesel particulate matter filter
  • SCR selective catalyst reduction
  • LNT lean NOx trap
  • the DOC may oxidize all hydrocarbons and carbon monoxide in the exhaust gas, and oxidize nitrogen monoxide to nitrogen dioxide.
  • the DPF may trap particulate matters in the exhaust gas, and purify the particulate matters through a chemical conversion process.
  • the SCR converts a reducing agent (urea), which is injected in a stream direction of the exhaust gas by an injector, into ammonia (NH 3 ) using heat of the exhaust gas, and reduces nitrogen oxide to nitrogen gas (N 2 ) and water (H 2 O) by a catalyst reaction between nitrogen oxide in the exhaust gas and ammonia by an SCR catalyst.
  • a reducing agent urea
  • NH 3 ammonia
  • N 2 nitrogen gas
  • H 2 O water
  • the DOC 2 and the DPF 3 are mounted on the path of an exhaust pipe 1 in a stream direction of exhaust gas, and the SCR 4 is mounted at a rear end of the DPF 3 , as illustrated in FIG. 1 .
  • a reducing agent slip catalyst 5 is installed at a rear end of the SCR 4 for removing a reducing agent slip which occurs on the SCR catalyst.
  • a mix region where a reducing agent and the exhaust gas are mixed is provided between a rear end of the DPF 3 and a front end of the SCR 4 , and an injector 7 , which injects the reducing agent into the exhaust pipe 1 , is mounted in the mix region.
  • the SCR 4 has a comparatively large volume in order to achieve sufficient purification efficiency of the nitrogen oxide in the exhaust gas, the SCR 4 is mounted at an under floor of a vehicle.
  • the present invention has been made in an effort to provide an exhaust gas purification system for a vehicle, capable of further improving purification performance of exhaust gas and reducing manufacturing costs with a simple configuration.
  • an exhaust gas purification system for a vehicle including: (i) a diesel oxidation catalyst (DOC) unit installed at an exhaust pipe, and (ii) a composite catalyst unit installed at the exhaust pipe at a rear end of the DOC unit and including a selective catalyst reduction (SCR) catalyst and an oxidation catalyst formed at a diesel particulate matter filter (DPP).
  • the exhaust gas purification system for a vehicle may further include an injector provided between the DOC unit and the composite catalyst unit and configured to inject a reducing agent into the exhaust pipe.
  • the SCR catalyst may be formed at an exhaust gas inlet side of the DPF and the oxidation catalyst may be formed at an exhaust gas outlet side of the DPF.
  • a catalyst non-coating region may be present between the inlet side and the outlet side of the DPF.
  • the SCR catalyst may comprise a material selected from Cu or Fe based zeolite and/or vanadium based materials.
  • the oxidation catalyst may comprise a noble metal catalyst selected from a group consisting of Pt, Pd, and Rh.
  • the composite catalyst unit may include a SCR on DPF (SDPF).
  • an exhaust gas purification system including: (i) a DOC unit installed at an exhaust pipe, and (ii) a composite catalyst unit installed at the exhaust pipe at a rear end of the DOC unit and including a SCR catalyst and an oxidation catalyst formed at a DPF, in which the composite catalyst unit may include a catalyst non-coating region provided between a coating region of the SCR catalyst and a coating region of the oxidation catalyst.
  • the DPF may include a cell passage having a zigzag form.
  • the SCR catalyst may be coated on an exhaust gas inlet side of the cell passage.
  • the oxidation catalyst may be coated on an exhaust gas outlet side of the cell passage.
  • the composite catalyst unit is provided in which the SCR catalyst is formed at the inlet side of the cell passage of the DPF, and the oxidation catalyst is formed at the outlet side of the cell passage, an SCR having a large volume in the related art may be removed or eliminated.
  • the oxidation catalyst is formed at the outlet side of the cell passage in the DPF of the composite catalyst unit, an amount of slip of the reducing agent, which is discharged without being reacted at the SCR catalyst, may be reduced, and CO, HC, or the like, which is generated by combustion of soot when the DPF is regenerated, may be purified while being oxidized.
  • a reducing agent slip catalyst of the related art may be removed or eliminated.
  • costs for manufacturing an SCR and a reducing agent slip catalyst may be reduced as an SCR and a reducing agent slip catalyst of the related art may be removed, and fuel efficiency may be improved as a weight of a vehicle is reduced.
  • an exhaust gas temperature is formed to be higher than that of the related art, and as a result, purification efficiency of NOx may be improved.
  • the SCR catalyst may perform its original function without degrading nitrogen oxide purification efficiency, and purification performance of nitrogen oxide may be improved to a level equal to or higher than the same level.
  • FIG. 1 is a block diagram schematically illustrating an exhaust gas purification system for a vehicle according to the related art.
  • FIG. 2 is a block diagram schematically illustrating an exemplary exhaust gas purification system for a vehicle according to the present invention.
  • FIG. 3 is a cross-sectional view schematically illustrating an exemplary composite catalyst unit applied to an exhaust gas purification system for a vehicle according to the present invention.
  • FIG. 4 is a graph for explaining an operational effect of an exemplary exhaust gas purification system for a vehicle according to the present invention.
  • FIG. 2 is a block diagram schematically illustrating an exhaust gas purification system for a vehicle according to various embodiments of the present invention.
  • an exhaust gas purification system 100 of a vehicle may be applied to an exhaust gas aftertreatment system provided at an exhaust system of a commercial diesel vehicle in order to purify exhaust gas discharged from an engine.
  • the exhaust gas purification system 100 may oxidize all hydrocarbons and carbon monoxides in the exhaust gas, and oxidize nitrogen monoxide to nitrogen dioxide.
  • the exhaust gas purification system 100 may trap particulate matters included in the exhaust gas, and purify the particulate matters through a chemical conversion process. Further, the exhaust gas purification system 100 may reduce nitrogen oxide in the exhaust gas to nitrogen gas by using a reducing agent such as a urea aqueous solution.
  • the exhaust gas purification system 100 of a vehicle may remove an SCR and a reducing agent slip catalyst of the related art, and has a structure that may further improve purification performance of the exhaust gas.
  • the exhaust gas purification system 100 of a vehicle includes a DOC catalyst unit 20 and a composite catalyst unit 50 .
  • the DOC catalyst unit 20 may be installed at an exhaust pipe 10 which forms a flow of the exhaust gas discharged from an engine of a vehicle.
  • the DOC catalyst unit 20 has a carrier provided in a predetermined case, and a diesel oxidation catalyst may be coated on the carrier.
  • the DOC catalyst unit 20 serves to oxidize all hydrocarbons and carbon monoxides in the exhaust gas by the diesel oxidation catalyst, and oxidize nitrogen monoxide to nitrogen dioxide. Because the DOC catalyst unit 20 is provided as a DOC catalyst apparatus which is known in the art, a detailed description of a structure thereof will be omitted in the present specification.
  • FIG. 3 is a cross-sectional view schematically illustrating the composite catalyst unit applied to the exhaust gas purification system for a vehicle according to various embodiments of the present invention.
  • the composite catalyst unit 50 serves to trap particulate matters included in the exhaust gas, and purify the particulate matters through a chemical conversion process.
  • the composite catalyst unit 50 serves to reduce nitrogen oxide in the exhaust gas to nitrogen gas by using a reducing agent such as a urea aqueous solution.
  • the composite catalyst unit 50 serves to remove slip of the reducing agent, which is not reacted, and oxidize and purify CO, HC, or the like generated by the combustion of soot.
  • the composite catalyst unit 50 is installed at the exhaust pipe 10 at a rear end of the DOC catalyst unit 20 .
  • the composite catalyst unit 50 is based on a DPF 61 , and an SCR catalyst 71 and an oxidation catalyst 81 are formed on the DPF 61 .
  • the composite catalyst unit 50 may be defined as an SDPF (SCR on DPF).
  • the DPF 61 is provided to trap particulate matters included in the exhaust gas and purify the particulate matters through a chemical conversion process, and may be a diesel particulate filter which is known in the art.
  • the DPF 61 forms or includes a cell passage 63 having a zigzag form, and has porosity equal to or greater than approximately 55% in which a size of a pore is large.
  • the SCR catalyst 71 may be coated on an exhaust gas inlet side of the DPF 61 , and the oxidation catalyst 81 may be coated on an exhaust gas outlet side of the DPF 61 . That is, the SCR catalyst 71 may be coated on a partial region from an end of the inlet side of the cell passage 63 of the DPF 61 , and the oxidation catalyst 81 may be coated on a partial region from an end of the outlet side of the cell passage 63 .
  • the SCR catalyst 71 may be made of any material selected from Cu or Fe based zeolite and vanadium based materials, or comprise a material selected from Cu or Fe based zeolite and vanadium based materials.
  • the oxidation catalyst 81 may be made of any one noble metal catalyst selected from a group including Pt, Pd, and Rh, or comprise a noble metal catalyst selected from a group consisting of Pt, Pd, and Rh.
  • the SCR catalyst 71 may reduce nitrogen oxide in the exhaust gas to nitrogen gas by using a reducing agent such as a urea aqueous solution. Further, the oxidation catalyst 81 may remove slip of the reducing agent, which is not reacted at the SCR catalyst 71 , and oxidize and purify CO, HC, or the like generated by combustion of soot when the DPF 61 is regenerated.
  • a reducing agent such as a urea aqueous solution.
  • the oxidation catalyst 81 may remove slip of the reducing agent, which is not reacted at the SCR catalyst 71 , and oxidize and purify CO, HC, or the like generated by combustion of soot when the DPF 61 is regenerated.
  • a catalyst non-coating region 65 may be present between the inlet side and the outlet side of the cell passage 63 .
  • the catalyst non-coating region 65 is provided between a coating region of the SCR catalyst 71 and a coating region of the oxidation catalyst 81 .
  • the reason why the catalyst non-coating region 65 is formed at the DPF 61 is to prevent the SCR catalyst 71 and the oxidation catalyst 81 from being overlapped through a wall of the cell passage 63 due to high porosity and a large sized pore of the DPF 61 . That is, if the SCR catalyst 71 and the oxidation catalyst 81 are overlapped through the wall of the cell passage 63 , as described above, the reducing agent for purifying nitrogen oxide is oxidized by the oxidation catalyst 81 including a noble metal, and thus purification efficiency of nitrogen oxide may deteriorate.
  • the SCR catalyst 71 formed of Cu, Fe, or the like poisons a noble metal and a wash coat in the oxidation catalyst 81 , an oxidation function may deteriorate. Therefore, in various embodiments of the present invention, because the catalyst non-coating region 65 is formed at the DPF 61 , the reducing agent for purifying nitrogen oxide does not cause an oxidation action by a noble metal catalyst of the oxidation catalyst 81 , and may generate a reaction of only the SCR catalyst 71 . Therefore, Cu, Fe, or the like may prevent the oxidation catalyst 81 from being poisoned.
  • the exhaust gas purification system 100 of a vehicle further includes an injector 90 (also commonly called “dosing unit” in this field), which injects the reducing agent into the exhaust pipe 10 at a rear end of the composite catalyst unit 50 .
  • the injector 90 may be installed at the exhaust pipe 10 between the DOC catalyst unit 20 and the composite catalyst unit 50 .
  • the reducing agent When the reducing agent is injected into the exhaust pipe 10 through the injector 90 , the reducing agent is converted into ammonia (NH 3 ) by heat of the exhaust gas, and nitrogen oxide may be reduced to nitrogen gas (N 2 ) and water (H 2 O) by a catalyst reaction between nitrogen oxide in the exhaust gas and ammonia by the SCR catalyst 71 of the composite catalyst unit 50 .
  • the injector 90 is provided as a dosing unit which is known in the art, a detailed description of a structure thereof will be omitted in the present specification.
  • the composite catalyst unit 50 is provided in which the SCR catalyst 71 is formed at the inlet side of the cell passage 63 of the DPF 61 , and the oxidation catalyst 81 is formed at the outlet side of the cell passage 63 , an SCR having a large volume in the related art may be removed.
  • the oxidation catalyst 81 is formed at the outlet side of the cell passage 63 in the DPF 61 of the composite catalyst unit 50 , an amount of slip of the reducing agent, which is discharged without being reacted at the SCR catalyst 71 , may be reduced, and CO, HC, or the like, which is generated by combustion of soot when the DPF 61 is regenerated, may be purified while being oxidized.
  • slip of the reducing agent which is not reacted at the SCR catalyst 71 , may be removed by the oxidation catalyst 81 of the composite catalyst unit 50 , a reducing agent slip catalyst of the related art may be removed.
  • costs for manufacturing an SCR and a reducing agent slip catalyst may be reduced as an SCR and a reducing agent slip catalyst of the related art may be removed, and fuel efficiency may be improved as a weight of a vehicle is reduced.
  • an exhaust gas temperature is formed to be higher than that of the related art, and as a result, purification efficiency of NOx may be improved.
  • the SCR catalyst 71 may perform its original function without degrading nitrogen oxide purification efficiency, and purification performance of nitrogen oxide may be improved to a level equal to or higher than the same level.

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  • 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)
US14/012,455 2012-11-12 2013-08-28 Exhaust gas purification system of vehicle Abandoned US20140134062A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020120127577A KR20140062899A (ko) 2012-11-12 2012-11-12 차량의 배기 가스 정화장치
KR10-2012-0127577 2012-11-12

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US (1) US20140134062A1 (zh)
KR (1) KR20140062899A (zh)
CN (1) CN103806989A (zh)
DE (1) DE102013109675A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160090887A1 (en) * 2014-09-26 2016-03-31 Cummins Emission Solutions, Inc. Integrative reductant system and method using constant volume injection
EP3207987A4 (en) * 2014-10-16 2017-11-22 Cataler Corporation Exhaust gas purification catalyst
US10159935B2 (en) 2014-10-16 2018-12-25 Cataler Corporation Exhaust gas purification catalyst

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105525967B (zh) * 2014-09-30 2019-06-18 康明斯排放处理公司 用于选择性催化还原系统的涂有催化剂的分流过滤器
KR101628098B1 (ko) * 2014-11-03 2016-06-08 현대자동차 주식회사 자동차의 배기가스 정화장치
KR20160064689A (ko) * 2014-11-28 2016-06-08 현대자동차주식회사 차량용 배기정화장치의 온도 저감 방법
CN114412622B (zh) * 2022-03-29 2022-06-17 天津内燃机研究所（天津摩托车技术中心） 一种车辆尾气净化装置

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US7481983B2 (en) * 2004-08-23 2009-01-27 Basf Catalysts Llc Zone coated catalyst to simultaneously reduce NOx and unreacted ammonia
US20110078997A1 (en) * 2009-10-02 2011-04-07 Basf Catalysts Llc Four-Way Diesel Catalysts and Methods of Use

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AU2010336727A1 (en) 2009-12-24 2012-05-31 Toray Industries, Inc. Composite semipermeable membrane and method for producing same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7481983B2 (en) * 2004-08-23 2009-01-27 Basf Catalysts Llc Zone coated catalyst to simultaneously reduce NOx and unreacted ammonia
US20110078997A1 (en) * 2009-10-02 2011-04-07 Basf Catalysts Llc Four-Way Diesel Catalysts and Methods of Use

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160090887A1 (en) * 2014-09-26 2016-03-31 Cummins Emission Solutions, Inc. Integrative reductant system and method using constant volume injection
US10473013B2 (en) * 2014-09-26 2019-11-12 Cummins Emission Solutions, Inc. Integrative reductant system and method using constant volume injection
US11286826B2 (en) 2014-09-26 2022-03-29 Cummins Emission Solutions, Inc. Integrative reductant system and method using constant volume injection
EP3207987A4 (en) * 2014-10-16 2017-11-22 Cataler Corporation Exhaust gas purification catalyst
US10159935B2 (en) 2014-10-16 2018-12-25 Cataler Corporation Exhaust gas purification catalyst
US10344655B2 (en) 2014-10-16 2019-07-09 Cataler Corporation Exhaust gas purification catalyst

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CN103806989A (zh) 2014-05-21
KR20140062899A (ko) 2014-05-27
DE102013109675A1 (de) 2014-05-15

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