JPH08509795A - 窒素酸化物含有排ガス中に環元剤を制御下に投入する方法及び装置 - Google Patents
窒素酸化物含有排ガス中に環元剤を制御下に投入する方法及び装置Info
- Publication number
- JPH08509795A JPH08509795A JP6524796A JP52479694A JPH08509795A JP H08509795 A JPH08509795 A JP H08509795A JP 6524796 A JP6524796 A JP 6524796A JP 52479694 A JP52479694 A JP 52479694A JP H08509795 A JPH08509795 A JP H08509795A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- reducing agent
- unit
- temperature
- catalyst
- 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.)
- Granted
Links
Classifications
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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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
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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
- B01D53/30—Controlling by gas-analysis apparatus
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8696—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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- 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
- 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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- 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
- F01N3/103—Oxidation catalysts for HC and CO only
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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
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation 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
- F01N3/10—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
- 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
- F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
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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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/40—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a hydrolysis catalyst
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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
- F01N2390/00—Arrangements for controlling or regulating exhaust apparatus
- F01N2390/02—Arrangements for controlling or regulating exhaust apparatus using electric components only
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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
- F01N2560/021—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
- 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
- F01N2560/07—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas flow rate or velocity meter or sensor, intake flow meters only when exclusively used to determine exhaust gas parameters
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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
- F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
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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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/18—Ammonia
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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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
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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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- 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
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Toxicology (AREA)
- Materials Engineering (AREA)
- Biomedical Technology (AREA)
- Exhaust Gas After Treatment (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.窒素酸化物を低減するために排ガス導管(2)内に組み込まれている触媒ユ ニット(8)を有する内燃機関(4)の窒素酸化物含有排ガス(10)に還元剤 (26)を制御下に投入する方法において、排ガス(10)に入れられる還元剤 の還元剤分量MRを少なくとも排ガス(10)の作動に関連するパラメータ、少 なくとも触媒ユニット(8)の作動に関連するパラメータ及び場合によっては少 なくともエンジン(4)の作動に関連するパラメータによって調整することを特 徴とする窒素酸化物含有排ガスに還元剤を制御下に投入する方法。 2.エンジン(4)の作動に関連するパラメータとして空気質量流量(LM)、 燃料噴射装置の位置に相応する制御棒ストローク(GP)、給気圧力(LD)及 び/又はエンジン回転数(MD)が用いられることを特徴とする請求項1記載の 方法。 3.排ガス(10)の作動に関連するパラメータとして排ガス(10)の温度( AT)、その圧力(AP)、その質量流量(AM)及びその窒素酸化物濃度(CNOx )が、、有利にはそれらすべてが一緒に用いられることを特徴とする請求項 1又は2記載の方法。 4.触媒ユニット(8)の作動に関連するパラメータとして触媒ユニットの温度 (KT)、圧力及び温度推移(k(p)及びk(T))を有する触媒活性度k、 圧力及び温度推移(CR(p)及びCR(T))を有する還元剤(26)のための 比蓄積容量(CR)及び例えば触媒活性コンパウンドの重量、形状及び熱移動の ような物理量が、有利にはそれらすべてが一緒に用いられることを特徴とする請 求項1ないし3の1つに記載の方法。 5.排ガス(10)中に含まれている窒素酸化物の窒素酸化物分量MNOxに相応 する還元剤分量MRを求め、場合によっては触媒ユニット(8)から脱離される 還元剤分量MDだけ減らすか或は触媒ユニット(8)により吸着される還元剤分 量MAだけ増すことを特徴とする請求項1ないし4の1つに記載の方法。 6.脱離される還元剤分量MD及び吸着される還元剤分量MAを求める際に、還元 剤の比蓄積容量CRが排ガス温度の上昇と共に低下し、排ガス圧力の上昇と共に 増加するように配慮することを特徴とする請求項5記載の方法。 7.急激な負荷の上昇を起こす制御棒ストロークの一時的変化の際に既に触媒ユ ニット(8)の温度Tを予め計算することによって中間値を減らすことを特徴と する請求項5記載の方法。 8.実際に触媒ユニット(8)に生じる温度降下で初めて中間値を増すことを特 徴とする請求項5記載の方法。 9.触媒ユニット(8)が最大の触媒活性度kmaxを有している温度T(kmax) よりも触媒ユニット(8)の排ガス温度が低い場合、山間値Z1(MR)を排ガス 温度の降下と共に下げ、、排ガス温度の上昇と共に上げることを特徴とする請求 項5ないし8の1つに記載の方法。 10.触媒ユニット(8)が最大触媒活性度kmaxを有している温度T(kmax) よりも触媒ユニット(8)の排ガス温度が高い場合、中間値Z1(MR)を排ガス 温度の上昇と共に下げ、排ガス温度の降下と共に上げることを特徴とする請求項 5ないし9の1つに記載の方法。 11.触媒ユニット(8)が設定されている最大空間速度を超えた場合中間値を 減らすことを特徴とする請求項5ないし10の1つに記載の方法。 12.作動時間tBが増すと共に中間値を減らすことを特徴とする請求項5ない し11の1つに記載の方法。 13.中間値を作動時間tBで評価される触媒ユニット(8)の排ガス温度に応 じて減らすことを特徴とする請求項12記載の方法。 14.内燃機関(4)の作動を開始する前に触媒ユニット(8)を還元剤(26 )及び炭化水素からブルーバーナにより解放することを特徴とする請求項1ない し13の1つに記載の方法。 15.窒素酸化物を低減するため排ガス導管(2)内に取付られた触媒ユニット (8)を有する内燃機関(4)の窒素酸化物含有排ガス(10)中に還元剤(2 6)を制御下に投入するための装置において、制御ユニット(38)、少なくと も排ガス(10)の作動に関連するパラメータ、少なくとも触媒ユニット(8) の作動に関連するパラメータ及び場合によっては少なくともエンジン(4)の作 動に関連するパラメータを検出するためにこの制御ユニット(38)に付設され ている手段(5、6、20、42、44)、及び還元剤(26)を触媒ユニット (8)の前で排ガス(10)の流れ方向に排ガス導管(2)に入れる制御ユニッ ト(38)に付設されている還元剤供給ユニット(24、30、32)を備えて おり、その際制御ユニット(38)が排ガス(10)に入れられる還元剤分量MR を作動に関連するパラメータに関連して調整するために備えられていることを 特徴とする特に請求項1ないし14による方法を実施するための装置。 16.触媒ユニット(8)が排ガスの流れ方向に加水分解触媒(14)、脱硝触 媒(16)及び場合によっては酸化触媒(18)を順次含んでいることを特徴と する請求項15記載の装置。 17.還元剤供給ユニット(24、30、32)が制御ユニット(38)により 調整可能の還元剤(26)、有利には水性尿素溶液のための注入弁(24)を有 していることを特徴とする請求項15又は16記載の装置。 18.制御ユニット(38)が還元剤分量MRを求めるために排ガス(10)、 触媒ユニット(8)及び場合によってはエンジン(4)の作動に関連する全ての パラメータのためのメモリを有しており、前記手段(5、6、20、42、44 )がそれらの信号で還元剤分量MRに対して適切な記憶値を呼び出し、その際記 憶値は還元剤供給ユニット(24、30、32)を制御するため制御ユニット( 38)の出力端子(A1)に導かれることを特徴とする請求項14ないし17の 1つに記載の装置。 19.制御ユニット(38)がマイクロプロセッサーサブユニット(40)を有 しており、このサブユニットがプログラムにより前記手段(5、6、20、42 、44)により検出される排ガス(10)、触媒ユニット(8)及び場合によっ てはエンジン(4)の作動に関連するパラメータから還元剤分量MRを求めるこ とを特徴とする請求項14ないし17の1つに記載の装置。
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DE4315278.3 | 1993-05-07 | ||
DE4315278A DE4315278A1 (de) | 1993-05-07 | 1993-05-07 | Verfahren und Einrichtung zur Dosierung eines Reduktionsmittels in ein stickoxidhaltiges Abgas |
PCT/DE1994/000463 WO1994027035A1 (de) | 1993-05-07 | 1994-04-27 | Verfahren und einrichtung zur gesteuerten einbringung eines reduktionsmittels in ein stickoxidhaltiges abgas |
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JPH08509795A true JPH08509795A (ja) | 1996-10-15 |
JP3342014B2 JP3342014B2 (ja) | 2002-11-05 |
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US (1) | US5628186A (ja) |
EP (1) | EP0697062B1 (ja) |
JP (1) | JP3342014B2 (ja) |
AT (1) | ATE143460T1 (ja) |
DE (2) | DE4315278A1 (ja) |
ES (1) | ES2091694T3 (ja) |
WO (1) | WO1994027035A1 (ja) |
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JP2003529699A (ja) * | 1998-11-13 | 2003-10-07 | エンゲルハード・コーポレーシヨン | NOxの還元を向上させる段階的還元剤注入 |
JP2010236554A (ja) | 2002-09-05 | 2010-10-21 | Johnson Matthey Plc | リーンバーンエンジン用排気機構 |
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WO2010095221A1 (ja) * | 2009-02-18 | 2010-08-26 | 本田技研工業株式会社 | 内燃機関の排気浄化システム |
JP5193355B2 (ja) * | 2009-02-18 | 2013-05-08 | 本田技研工業株式会社 | 内燃機関の排気浄化システム |
US8833062B1 (en) | 2013-03-15 | 2014-09-16 | Daimier Ag | Catalytic reduction of NOx |
US8850802B1 (en) | 2013-03-15 | 2014-10-07 | Daimler Ag | Catalytic reduction of NOx |
Also Published As
Publication number | Publication date |
---|---|
JP3342014B2 (ja) | 2002-11-05 |
ES2091694T3 (es) | 1996-11-01 |
DE4315278A1 (de) | 1994-11-10 |
DE59400746D1 (de) | 1996-10-31 |
EP0697062A1 (de) | 1996-02-21 |
WO1994027035A1 (de) | 1994-11-24 |
EP0697062B1 (de) | 1996-09-25 |
ATE143460T1 (de) | 1996-10-15 |
US5628186A (en) | 1997-05-13 |
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