JP2014163253A - 内燃機関の排気浄化装置 - Google Patents
内燃機関の排気浄化装置 Download PDFInfo
- Publication number
- JP2014163253A JP2014163253A JP2013033286A JP2013033286A JP2014163253A JP 2014163253 A JP2014163253 A JP 2014163253A JP 2013033286 A JP2013033286 A JP 2013033286A JP 2013033286 A JP2013033286 A JP 2013033286A JP 2014163253 A JP2014163253 A JP 2014163253A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- exhaust
- exhaust gas
- internal combustion
- combustion engine
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 26
- 238000002347 injection Methods 0.000 claims abstract description 21
- 239000007924 injection Substances 0.000 claims abstract description 21
- 238000000746 purification Methods 0.000 claims abstract description 19
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 42
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 20
- 229910021529 ammonia Inorganic materials 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 239000013618 particulate matter Substances 0.000 claims description 9
- 230000008021 deposition Effects 0.000 claims description 6
- 230000008929 regeneration Effects 0.000 claims description 5
- 238000011069 regeneration method Methods 0.000 claims description 5
- 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 claims description 4
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 3
- 229910017464 nitrogen compound Inorganic materials 0.000 claims description 3
- 150000002830 nitrogen compounds Chemical class 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 abstract description 17
- 238000009825 accumulation Methods 0.000 abstract description 12
- 239000000243 solution Substances 0.000 abstract 1
- 229910002089 NOx Inorganic materials 0.000 description 20
- 239000000446 fuel Substances 0.000 description 5
- 238000012805 post-processing Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052878 cordierite Inorganic materials 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
- 230000000694 effects Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Images
Classifications
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- 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]
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- 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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- 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
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- 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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- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
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- F01N2240/16—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 an electric heater, i.e. a resistance heater
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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
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1606—Particle filter loading or soot amount
-
- 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
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1614—NOx amount trapped in catalyst
-
- 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
- F01N3/0235—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 exhaust gas throttling means
-
- 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
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
- F01N3/2026—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means directly electrifying the catalyst substrate, i.e. heating the electrically conductive catalyst substrate by joule effect
-
- 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
-
- 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)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
【解決手段】排気中のPMを捕集するDPF16と、排気中に尿素水を噴射する尿素水噴射装置21と、排気中のNOxを還元浄化するSCR22と、DPF16の静電容量を検出する静電容量検出ユニット17a,17b,41と、静電容量に基づいてPM堆積量を算出するPM堆積量算出部42と、PM堆積量に基づいてNO2の消費量を算出するNO2消費量推定部43と、推定される消費量に基づいて、SCR22に流入するNOとNO2の比率が1:1に近づくように、エンジン10を制御する制御ユニット44,45とを備えた。
【選択図】図1
Description
2NH3+NO+NO2→2N2+3H2O・・・式(1)
12 排気通路
13 排気管内噴射装置
14 前段後処理装置
16 DPF(フィルタ)
17a,17b 電極(静電容量検出手段)
20 後段後処理装置
21 尿素水噴射装置(尿素水噴射手段)
22 SCR(選択的還元触媒)
40 ECU
41 静電容量演算部(静電容量検出手段)
42 PM堆積量算出部(堆積量算出手段)
43 NO2消費量推定部(消費量算出手段)
44 NOx流入比率算出部(制御手段)
45 NOx流入比率調整部(制御手段)
Claims (4)
- 内燃機関の排気通路に設けられて、排気中の粒子状物質を捕集するフィルタと、
前記フィルタよりも下流側の排気通路に設けられて、排気中に尿素水を噴射する尿素水噴射手段と、
前記尿素水噴射手段よりも下流側の排気通路に設けられて、尿素水から生成されるアンモニアを用いて排気中の窒素化合物を還元浄化する選択的還元触媒と、
前記フィルタの静電容量を検出する静電容量検出手段と、
検出される前記静電容量に基づいて、前記フィルタに捕集された粒子状物質の堆積量を算出する堆積量算出手段と、
算出される前記堆積量に基づいて、前記フィルタに堆積した粒子状物質による二酸化窒素の消費量を推定する消費量推定手段と、
推定される前記消費量に基づいて、前記選択的還元触媒に流入する排気中の一酸化炭素と二酸化窒素との比率が1:1に近づくように、前記内燃機関の燃焼状態を制御する制御手段と、を備える
ことを特徴とする内燃機関の排気浄化装置。 - 前記静電容量検出手段は、
前記フィルタ内の少なくとも一個以上のセルを挟んで対向する一対のセルにそれぞれ挿入される一対の電極を有する
請求項1に記載の内燃機関の排気浄化装置。 - 前記フィルタよりも上流側の排気通路から分岐して、当該フィルタを迂回するバイパス通路と、
前記バイパス通路に設けられて、当該バイパス通路を流れる排気中の粒子状物質を捕集する第2のフィルタと、をさらに備え、
前記一対の電極は、前記第2のフィルタ内の少なくとも一個以上のセルを挟んで対向する一対のセルにそれぞれ挿入される
請求項2に記載の内燃機関の排気浄化装置。 - 前記第2のフィルタの強制再生を実行する際は、前記一対の電極をヒータとして機能させる
請求項3に記載の内燃機関の排気浄化装置。
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PCT/JP2014/053737 WO2014129449A1 (ja) | 2013-02-22 | 2014-02-18 | 内燃機関の排気浄化装置 |
US14/768,577 US9664090B2 (en) | 2013-02-22 | 2014-02-18 | Exhaust purification device for internal combustion engine |
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GB2587723B8 (en) * | 2014-12-31 | 2021-08-25 | Cummins Emission Solutions Inc | Single module integrated aftertreatment module |
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DE102016219387B4 (de) | 2016-10-06 | 2019-01-24 | Audi Ag | Verfahren und Vorrichtung zur Kalibrierung eines Abgassensors |
CN106837495B (zh) * | 2016-12-26 | 2019-07-30 | 潍柴动力股份有限公司 | 基于模型的doc后no2%预估方法 |
US10641153B1 (en) * | 2018-11-26 | 2020-05-05 | Tenneco Automotive Operating Company Inc. | Exhaust after-treatment system having an oxidation component bypass for low temperature SCR |
DE102019203306A1 (de) * | 2019-03-12 | 2020-09-17 | Vitesco Technologies GmbH | Abgasnachbehandlungsvorrichtung und Verfahren zum Betrieb der Vorrichtung |
CN109973177A (zh) * | 2019-03-29 | 2019-07-05 | 河南科技大学 | 一种柴油机后处理装置 |
CN110925066B (zh) * | 2020-02-17 | 2020-05-22 | 潍柴动力股份有限公司 | 后处理控制方法及发动机 |
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