KR20050057213A - 희박 연소 ic 엔진용 배기 시스템 - Google Patents
희박 연소 ic 엔진용 배기 시스템 Download PDFInfo
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- KR20050057213A KR20050057213A KR1020057003827A KR20057003827A KR20050057213A KR 20050057213 A KR20050057213 A KR 20050057213A KR 1020057003827 A KR1020057003827 A KR 1020057003827A KR 20057003827 A KR20057003827 A KR 20057003827A KR 20050057213 A KR20050057213 A KR 20050057213A
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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
- F01N3/18—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]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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- 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
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- 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
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- 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
- B01D53/9481—Catalyst preceded by an adsorption device without catalytic function for temporary storage of contaminants, e.g. during cold start
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- 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
- B01D53/9495—Controlling the catalytic process
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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
- 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
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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
- 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
- F01N13/0097—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 the purifying devices are arranged in a single housing
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- 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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
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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
- F01N3/02—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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/0231—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 using means for regenerating the filters, e.g. by burning trapped particles using special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- 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
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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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
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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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
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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
- F01N3/18—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/911—NH3-storage component incorporated in the catalyst
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- 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
- B01D53/9481—Catalyst preceded by an adsorption device without catalytic function for temporary storage of contaminants, e.g. during cold start
- B01D53/949—Catalyst preceded by an adsorption device without catalytic function for temporary storage of contaminants, e.g. during cold start for storing sulfur oxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/021—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting ammonia NH3
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
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- 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
- F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
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- 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
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Abstract
Description
Claims (42)
- 산화질소(NOx) 흡수제, NOx의 NOx 특이적 반응물과의 선택적 촉매 환원의 촉매 작용을 위한 촉매, NOx 특이적 반응물 또는 그것의 전구체를 SCR 촉매의 상류의 배기 가스로 도입하기 위한 제1 수단 및 상기 제1 도입 수단에 의해 NOx 특이적 반응물 또는 그것의 전구체를 배기 가스로 도입하는 것을 제어하기 위한 수단을 포함하고, 상기 SCR 촉매는 NOx 흡수제의 상류에, 임의로 NOx 흡수제와 함께 배치하며, 상기 제어 수단은 상기 SCR 촉매가 활성일 경우에만 NOx 특이적 반응물 또는 그것의 전구체를 상기 제1 도입 수단에 도입하도록 배열되어 NOx 특이적 반응물이 대기로 배기되는 것을 실질적으로 방지하는 것을 특징으로 하는 희박 연소 내연 엔진용 배기 시스템.
- 제1항에 있어서, SCR 촉매의 활성은 그 온도에 의해 결정되는 것을 특징으로 하는 배기 시스템.
- 제2항에 있어서, 제어 수단은 SCR 촉매가 제1 소정 온도 이상인 경우에 NOx 특이적 반응물 또는 그것의 전구체를 도입하는 것을 특징으로 하는 배기 시스템.
- 제1항, 제2항 또는 제3항에 있어서, 제어 수단은 SCR 촉매가 NOx 특이적 반응물을 NO로 산화시키기에 충분히 고온인 경우에 NOx 특이적 반응물 또는 그것의 전구체의 배기 가스로의 공급을 중단하도록 배열된 것을 특징으로 하는 배기 시스템.
- 제1항에 있어서, NOx 특이적 반응물 또는 그것의 전구체의 공급은 SCR 촉매가 제2 소정 온도 이상인 경우 중단되는 것을 특징으로 하는 배기 시스템.
- 제1항 내지 제5항 중 어느 한 항에 있어서, NOx 특이적 반응물 또는 그것의 전구체를 도입하기 위한 제2 수단을 포함하며, 상기 제2 도입 수단은 NOx 흡수제의 상류 및 SCR 촉매의 하류에 배치된 것을 특징으로 하는 배기 시스템.
- 제6항에 있어서, 제어 수단은 NOx 흡수제가, NOx 재생이 효과적인 온도 이상일 경우에만 NOx 특이적 반응물 또는 그것의 전구체를 배기 가스에 공급하도록 배열된 것을 특징으로 하는 배기 시스템.
- 제7항에 있어서, NOx 재생이 효과적인 온도는 제3 소정 온도인 것을 특징으로 하는 배기 시스템.
- 제7항 또는 제8항에 있어서, 제어 수단은 NOx 흡수제가, NOx 저장이 효과적으로 열 제한되는 온도 이상인 경우에 NOx 특이적 반응물 또는 그것의 전구체의 배기 가스로의 공급을 중단하도록 배열된 것을 특징으로 하는 배기 시스템.
- 제9항에 있어서, NOx 저장이 효과적으로 열 제한되는 온도는 제4 소정 온도인 것을 특징으로 하는 배기 시스템.
- 제3항에 있어서, 제1 소정 온도는 100 내지 600℃, 바람직하게 150 내지 500℃, 가장 바람직하게는 200 내지 450℃인 것을 특징으로 하는 배기 시스템.
- 제5항에 있어서, 제2 소정 온도는 450 내지 900℃, 바람직하게 550 내지 800℃, 가장 바람직하게 650 내지 700℃인 것을 특징으로 하는 배기 시스템.
- 제8항 또는 제11항에 있어서, 제3 소정 온도는 75 내지 200℃, 바람직하게는 100 내지 175℃, 가장 바람직하게는 125 내지 600℃인 것을 특징으로 하는 배기 시스템.
- 제13항에 있어서, 제1 소정 온도는 제3 소정 온도와 같은 것을 특징으로 하는 배기 시스템.
- 제10항에 있어서, 제4 소정 온도는 350 내지 600℃, 바람직하게는 400 내지 550℃, 가장 바람직하게는 450 내지 500℃인 것을 특징으로 하는 배기 시스템.
- 전술한 항 중 어느 한 항에 있어서, 배기 가스 내 NO를 NO2로 산화시키기 위한 촉매 및 400℃ 이하에서 NO2 연소를 위한 배기 가스 내 미립자 물질을 수집하기 위한 필터를 포함하는 것을 특징으로 하는 배기 시스템.
- 제16항에 있어서, 필터는 SCR 촉매의 하류에 있는 것을 특징으로 하는 배기 시스템.
- 제16항에 있어서, SCR 촉매는 필터 위에 배치된 것을 특징으로 하는 배기 시스템.
- 제16항 또는 제18항에 있어서, NOx 흡수제는 필터 위에 배치된 것을 특징으로 하는 배기 시스템.
- 전술한 항 중 어느 한 항에 있어서, NOx 흡수제의 하류에 배치된 제2 SCR 촉매를 더 포함하는 것을 특징으로 하는 배기 시스템.
- 전술한 항 중 어느 한 항에 있어서, SCR 촉매의 하류에 위치된 배기 가스 내의 NOx 특이적 반응물 또는 그것의 전구체의 농도를 검출하기 위한 적어도 하나의 센서를 포함하는 것을 특징으로 하는 배기 시스템.
- 전술한 항 중 어느 한 항에 있어서, NOx 흡수제의 하류에 위치된 배기 가스 내의 NOx 특이적 반응물 또는 그것의 전구체의 농도를 검출하기 위한 적어도 하나의 센서를 포함하는 것을 특징으로 하는 배기 시스템.
- 제21항 또는 제22항에 있어서, 제어 수단이 배기 가스 내의 NOx 특이적 반응물 또는 그것의 전구체의 검출된 농도에 반응하여 NOx 특이적 반응물 또는 그것의 전구체의 공급을 조절하는 것을 특징으로 하는 배기 시스템.
- 전술된 항 중 어느 한 항에 있어서, 제어 수단이 배기 가스 온도에 반응하여 NOx 특이적 반응물 또는 그것의 전구체의 공급을 조절하는 것을 특징으로 하는 배기 시스템.
- 전술한 항 중 어느 한 항에 있어서, 제어 수단이 엔진속도/하중 맵의 소정 세팅에 반응하여 NOx 특이적 반응물 또는 그것의 전구체의 공급을 조절하는 것을 특징으로 하는 배기 시스템.
- 전술한 항 중 어느 한 항에 있어서, 제어 수단은 간헐적으로 그리고 "스파이크" 농도에서 NOx 특이적 반응물 또는 그것의 전구체를 공급하도록 배열된 것을 특징으로 하는 배기 시스템.
- 제26항에 있어서, NOx 특이적 반응물 또는 그것의 전구체의 공급 사이의 각 기간은 1초 내지 10분의 범위에서 선택되는 것을 특징으로 하는 배기 시스템.
- 전술한 항 중 어느 한 항에 따르는 배기 시스템을 포함하는 희박 연소 내연 엔진.
- 제28항에 있어서, 디젤 엔진 또는 가솔린 엔진인 것을 특징으로 하는 엔진.
- 희박 연소 내연 엔진으로부터 배기 가스 내 NOx를 처리하는 방법으로서, 상기 엔진은 산화질소(NOx) 흡수제 및 NOx 특이적 반응물을 이용한 NOx의 선택적 촉매 환원(SCR)을 촉매 작용하기 위한 촉매를 포함하는 배기 시스템을 포함하며, 상기 SCR 촉매는 NOx 흡수제의 상류에 배치되고, 임의로 NOx 흡수제를 가지며, 상기 방법은 상기 SCR 촉매가 비활성인 경우, 이를 충분한 NOx 특이적인 반응물과 접촉시켜서 배기 가스 내 NOx를 N2로 환원시키는 것을 포함하여 NOx 특이적 반응물이 대기로 배기되는 것을 실질적으로 방지하는 것을 특징으로 하는 방법.
- 제30항에 있어서, SCR 촉매 활성은 제1 소정 온도에 대한 온도에 의해 결정되는 것을 특징으로 하는 방법.
- 제30항 또는 제31항에 있어서, SCR 촉매가 비활성인 경우, NOx 흡수제와 접촉하는 NOx 특이적 반응물은 상기 촉매와 접촉되지 않는 것을 특징으로 하는 방법.
- 제30항, 제31항 또는 제32항에 있어서, 상기 SCR 촉매가 활성인 경우, 충분한 NOx 특이적 반응물이 SCR 촉매와 접촉하여 배기 가스 내 NOx를 N2로 환원시키고, SCR 촉매를 통과하여 누출되어 NOx 흡수제와 접촉함으로써 저장된 NOx를 환원시키며, 이 과정은 누출된 NOx 특이적 반응물이 저장된 전체 NOx를 완전히 산화시키기에는 불충분하도록 제어되는 것을 특징으로 하는 방법.
- 제31항에 있어서, 제1 소정 온도는 100 내지 600℃, 바람직하게는 150 내지 500℃, 가장 바람직하게는 200 내지 450℃인 것을 특징으로 하는 배기 시스템.
- 제30항 내지 제34항 중 어느 한 항에 있어서, 재생의 말미에 NOx 흡수제는 재생을 개시했을 때 존재하는 NOx의 함량의 5 내지 50%를 함유하는 것을 특징으로 하는 방법.
- 제30항 내지 제35항 중 어느 한 항에 있어서, 흡수제가 NOx 누출이 일어나는 NOx 함량의 5 내지 50%를 함유할 때 재생이 시작되는 것을 특징으로 하는 방법.
- 제30항 내지 제36항 중 어느 한 항에 있어서,NOx 특이적 반응물이 NOx 흡수제를 담지한 기재의 길이를 따른 지점부 경로에서 검출되는 경우;고체 흡수제를 담지한 두 가지 기질을 연속하여 가진 시스템에서 NOx 특이적 반응물이 기재 간의 지점에서 검출되는 경우;엔진속도/하중 맵의 소정 데이타를 토대로 규정된 NOx 함량의 레벨에 도달한 경우;NOx 특이적 반응물 누출의 초기 관찰로부터 반복적으로 설정된 NOx 함량의 레벨에 도달한 경우 중 하나에서 재생이 중지되도록 제어되는 것을 특징으로 하는 방법.
- 제30항 내지 제37항 중 어느 한 항에 있어서, 흡수 및/또는 재생의 시간 기간은 1초 내지 10분의 범위인 것을 특징으로 하는 방법.
- 제30항 내지 제38항 중 어느 한 항에 있어서, NOx 흡수제는 제1 기질 위에 지지되고, SCR 촉매는 제2 기질 위에 지지되는 것을 특징으로 하는 방법.
- 제30항 내지 제39항 중 어느 한 항에 있어서, NOx 특이적 반응물은 그것의 전구체로부터 인시튜 생성되는 것을 특징으로 하는 방법.
- 제40항에 있어서, 전구체를 촉매반응시켜 NOx 특이적 반응물을 제공하는 단계를 더 포함하는 것을 특징으로 하는 방법.
- 제30항 내지 제41항 중 어느 한 항에 있어서, 출발 가스는 희박 연소 엔진, 특히 디젤, 내연 엔진의 배기 가스인 것을 특징으로 하는 방법.
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GBGB0220645.6A GB0220645D0 (en) | 2002-09-05 | 2002-09-05 | Exhaust system for a lean burn ic engine |
GB0220645.6 | 2002-09-05 | ||
PCT/GB2003/003827 WO2004022935A1 (en) | 2002-09-05 | 2003-09-03 | Exhaust system for lean burn ic engines |
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EP (1) | EP1534941B1 (ko) |
JP (2) | JP4628787B2 (ko) |
KR (1) | KR101060125B1 (ko) |
AT (1) | ATE556203T1 (ko) |
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BR (1) | BR0313501A (ko) |
CA (1) | CA2494112A1 (ko) |
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KR101379955B1 (ko) * | 2007-08-10 | 2014-03-28 | 에스케이이노베이션 주식회사 | 다단 저감 방식의 배기가스 정화 장치 |
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JP4628787B2 (ja) | 2011-02-09 |
US20060254258A1 (en) | 2006-11-16 |
BR0313501A (pt) | 2005-06-21 |
AU2003269109A1 (en) | 2004-03-29 |
EP1534941A1 (en) | 2005-06-01 |
US7178331B2 (en) | 2007-02-20 |
JP2005538291A (ja) | 2005-12-15 |
JP2010236554A (ja) | 2010-10-21 |
ATE556203T1 (de) | 2012-05-15 |
MXPA05001877A (es) | 2005-06-03 |
JP5528195B2 (ja) | 2014-06-25 |
ZA200500919B (en) | 2006-10-25 |
CA2494112A1 (en) | 2004-03-18 |
KR101060125B1 (ko) | 2011-08-29 |
WO2004022935A1 (en) | 2004-03-18 |
GB0220645D0 (en) | 2002-10-16 |
EP1534941B1 (en) | 2012-05-02 |
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