JP2007154849A - 排気ガス浄化システムの制御方法 - Google Patents
排気ガス浄化システムの制御方法 Download PDFInfo
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- JP2007154849A JP2007154849A JP2005354891A JP2005354891A JP2007154849A JP 2007154849 A JP2007154849 A JP 2007154849A JP 2005354891 A JP2005354891 A JP 2005354891A JP 2005354891 A JP2005354891 A JP 2005354891A JP 2007154849 A JP2007154849 A JP 2007154849A
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- aqueous solution
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- 238000000034 method Methods 0.000 title claims abstract description 56
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 185
- 239000003054 catalyst Substances 0.000 claims abstract description 109
- 230000008929 regeneration Effects 0.000 claims abstract description 106
- 238000011069 regeneration method Methods 0.000 claims abstract description 106
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 91
- 239000007864 aqueous solution Substances 0.000 claims abstract description 65
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 33
- 238000002485 combustion reaction Methods 0.000 claims abstract description 19
- 238000000746 purification Methods 0.000 claims description 71
- 238000010531 catalytic reduction reaction Methods 0.000 claims description 39
- 239000013618 particulate matter Substances 0.000 claims description 32
- 238000005259 measurement Methods 0.000 claims description 10
- 230000003197 catalytic effect Effects 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract description 8
- 239000000243 solution Substances 0.000 abstract description 7
- 239000003638 chemical reducing agent Substances 0.000 abstract description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 666
- 239000007789 gas Substances 0.000 description 84
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 75
- 238000002347 injection Methods 0.000 description 58
- 239000007924 injection Substances 0.000 description 58
- 238000006722 reduction reaction Methods 0.000 description 15
- 239000000446 fuel Substances 0.000 description 11
- 230000003647 oxidation Effects 0.000 description 10
- 238000007254 oxidation reaction Methods 0.000 description 10
- 238000009825 accumulation Methods 0.000 description 7
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 6
- 239000004202 carbamide Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 102220521910 THAP domain-containing protein 1_S21C_mutation Human genes 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- 102220247850 rs1421233354 Human genes 0.000 description 2
- 102220061996 rs786203944 Human genes 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 102220585520 T cell receptor gamma constant 1_S20A_mutation Human genes 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910003446 platinum oxide Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
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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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- 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
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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
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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
- F01N3/10—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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- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/005—Electrical control of exhaust gas treating apparatus using models instead of sensors to determine operating characteristics of exhaust systems, e.g. calculating catalyst temperature instead of measuring it directly
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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
- F02D41/029—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 particulate filter
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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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
- F02D41/1461—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine
- F02D41/1462—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine with determination means using an estimation
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- 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
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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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
- 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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- 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
- F01N2900/08—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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N2900/06—Parameters used for exhaust control or diagnosing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2409—Addressing techniques specially adapted therefor
- F02D41/2422—Selective use of one or more tables
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- 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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- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
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- Treating Waste Gases (AREA)
Abstract
【解決手段】通常運転時には、通常運転時用のNOx排出量マップからNOx排出量を算出し、DPF装置13の強制再生時には、強制再生時用のNOx排出量マップから、NOx排出量を算出して、該算出されたNOx排出量に対応するアンモニア系水溶液の供給量を算出し、該算出された供給量になるように前記アンモニア系水溶液を選択的接触還元型触媒装置の上流側の排気ガス中に供給する。
【選択図】図2
Description
11 エンジン
12 排気通路
13 DPF装置
14 SCR触媒装置(選択的接触還元型触媒装置)
15 酸化触媒装置
21 尿素水噴射弁
23 尿素水噴射制御装置(尿素水噴射制御手段)
23A 供給量調整装置(水溶液供給量調整手段)
23B 噴射弁制御装置(噴射弁制御手段)
30 制御装置(エンジンECU)
31 入口排気ガス温度センサ
32 出口排気ガス温度センサ
33 上流側NOx濃度センサ
34 下流側NOx濃度センサ
35 アンモニア濃度センサ
Cnoxa 上流側NOx濃度
Cnoxb 下流側NOx濃度
Cnh3 アンモニア濃度
T14a SCR触媒入口温度
T14b SCR触媒出口温度
Claims (4)
- 内燃機関の排気通路に上流側から順に、排気ガス中の粒子状物質を浄化するためのディーゼルパティキュレートフィルタ装置と、NOxを浄化するための選択的接触還元型触媒装置を配設し、前記選択的接触還元型触媒装置にアンモニア系水溶液を供給する水溶液供給装置を、前記ディーゼルパティキュレートフィルタ装置の下流側でかつ前記選択的接触還元型触媒装置の上流側に配設すると共に、前記アンモニア系水溶液の供給量を調整する水溶液供給量調整手段を備えた排気ガス浄化システムの制御方法において、通常運転時のNOx排出量と前記ディーゼルパティキュレートフィルタ装置の強制再生時のNOx排出量とを予め測定し、この測定結果を基に、通常運転時用のNOx排出量マップと、前記ディーゼルパティキュレートフィルタ装置の強制再生時用のNOx排出量マップとを用意すると共に、通常運転時には、前記通常運転時用のNOx排出量マップからNOx排出量を算出し、該算出されたNOx排出量を還元するのに必要なアンモニア系水溶液の供給量を算出し、該算出された供給量になるように前記アンモニア系水溶液を供給し、前記ディーゼルパティキュレートフィルタ装置の強制再生時には、前記強制再生時用のNOx排出量マップから、NOx排出量を算出し、該算出されたNOx排出量に対応するアンモニア系水溶液の供給量を算出し、該算出された供給量になるように前記アンモニア系水溶液を供給することを特徴とする排気ガス浄化システムの制御方法。
- 内燃機関の排気通路に上流側から順に、排気ガス中の粒子状物質を浄化するためのディーゼルパティキュレートフィルタ装置と、NOxを浄化するための選択的接触還元型触媒装置を配設し、前記選択的接触還元型触媒装置にアンモニア系水溶液を供給する水溶液供給装置を、前記ディーゼルパティキュレートフィルタ装置の下流側でかつ前記選択的接触還元型触媒装置の上流側に配設すると共に、前記アンモニア系水溶液の供給量を調整する水溶液供給量調整手段を備えた排気ガス浄化システムの制御方法において、通常運転時のNOx排出量を予め測定し、この測定結果を基に、通常運転時用のNOx排出量マップを用意すると共に、通常運転時には、前記通常運転時用のNOx排出量マップからNOx排出量を算出し、該算出されたNOx排出量に対応するアンモニア系水溶液の供給量を算出し、該算出された供給量になるように前記アンモニア系水溶液を供給し、前記ディーゼルパティキュレートフィルタ装置の強制再生時には、前記選択的接触還元型触媒装置の上流側に設けたNOx濃度センサによって測定されたNOx濃度と排気ガス排出量とによって、前記NOx排出量を算出し、該算出されたNOx排出量に対応するアンモニア系水溶液の供給量を算出し、該算出された供給量になるように前記アンモニア系水溶液を供給することを特徴とする排気ガス浄化システムの制御方法。
- 内燃機関の排気通路に上流側から順に、排気ガス中の粒子状物質を浄化するためのディーゼルパティキュレートフィルタ装置と、NOxを浄化するための選択的接触還元型触媒装置を配設し、前記選択的接触還元型触媒装置にアンモニア系水溶液を供給する水溶液供給装置を、前記ディーゼルパティキュレートフィルタ装置の下流側でかつ前記選択的接触還元型触媒装置の上流側に配設すると共に、前記アンモニア系水溶液の供給量を調整する水溶液供給量調整手段を備えた排気ガス浄化システムの制御方法において、通常運転時のNOx排出量を予め測定し、この測定結果を基に、通常運転時用のNOx排出量マップを用意すると共に、通常運転時には、前記通常運転時用のNOx排出量マップからNOx排出量を算出し、該算出されたNOx排出量に対応するアンモニア系水溶液の供給量を算出し、該算出された供給量になるように前記アンモニア系水溶液を供給し、前記ディーゼルパティキュレートフィルタ装置の強制再生時には、前記選択的接触還元型触媒装置の下流側に設けたNOxセンサによって測定されたNOx濃度が所定の第1設定値以下になるように前記アンモニア系水溶液を供給することを特徴とする排気ガス浄化システムの制御方法。
- 内燃機関の排気通路に上流側から順に、排気ガス中の粒子状物質を浄化するためのディーゼルパティキュレートフィルタ装置と、NOxを浄化するための選択的接触還元型触媒装置を配設し、前記選択的接触還元型触媒装置にアンモニア系水溶液を供給する水溶液供給装置を、前記ディーゼルパティキュレートフィルタ装置の下流側でかつ前記選択的接触還元型触媒装置の上流側に配設すると共に、前記アンモニア系水溶液の供給量を調整する水溶液供給量調整手段を備えた排気ガス浄化システムの制御方法において、通常運転時のNOx排出量を予め測定し、この測定結果を基に、通常運転時用のNOx排出量マップを用意すると共に、通常運転時には、前記通常運転時用のNOx排出量マップからNOx排出量を算出し、該算出されたNOx排出量に対応するアンモニア系水溶液の供給量を算出し、該算出された供給量になるように前記アンモニア系水溶液を供給し、前記ディーゼルパティキュレートフィルタ装置の強制再生時には、前記選択的接触還元型触媒装置の下流側に設けたアンモニア濃度センサによって測定されたアンモニア濃度が所定の第2設定値以上かつ所定の第3設定値以下になるように前記アンモニア系水溶液を供給することを特徴とする排気ガス浄化システムの制御方法。
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WO2010087369A1 (ja) | 2009-01-30 | 2010-08-05 | 三菱重工業株式会社 | 排ガス浄化装置 |
US9051863B2 (en) | 2009-01-30 | 2015-06-09 | Mitsubishi Heavy Industries, Ltd. | Flue gas purifying device |
JP2012002064A (ja) * | 2010-05-17 | 2012-01-05 | Isuzu Motors Ltd | Scrシステム |
JP2012002063A (ja) * | 2010-05-17 | 2012-01-05 | Isuzu Motors Ltd | Scrシステム |
JP2012002065A (ja) * | 2010-05-17 | 2012-01-05 | Isuzu Motors Ltd | Scrシステム |
JP2012047081A (ja) * | 2010-08-25 | 2012-03-08 | Honda Motor Co Ltd | 内燃機関の排気浄化システム |
CN102269031A (zh) * | 2011-07-01 | 2011-12-07 | 吉林大学 | 通用型scr喷射系统 |
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US20090165442A1 (en) | 2009-07-02 |
CN101300410A (zh) | 2008-11-05 |
US7950224B2 (en) | 2011-05-31 |
EP1959108B1 (en) | 2012-06-06 |
CN101300410B (zh) | 2011-12-28 |
EP1959108A4 (en) | 2010-02-17 |
EP1959108A1 (en) | 2008-08-20 |
JP5296291B2 (ja) | 2013-09-25 |
WO2007066502A1 (ja) | 2007-06-14 |
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