JP2019157667A - 排気浄化装置、車両および排気浄化制御装置 - Google Patents
排気浄化装置、車両および排気浄化制御装置 Download PDFInfo
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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
-
- 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
- F01N3/025—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 fuel burner or by adding fuel to exhaust
-
- 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
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
-
- 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
- F02D41/04—Introducing corrections for particular operating conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
-
- 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
-
- 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)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
内燃機関から生じた排気ガスが流れる排気管と、
前記排気管内に配置され、還元剤を吸着することで前記排気ガス中の窒素酸化物を浄化処理するNOx選択還元型触媒と、
前記排気ガスが流れる排気方向において前記NOx選択還元型触媒よりも前記排気管内の上流側に配置され、前記排気ガス中の窒素酸化物を吸蔵するNOx吸蔵還元型触媒と、
前記排気管から前記内燃機関の吸気管と前記排気管とを接続し、前記排気管内の前記排気ガスを前記吸気管に再循環させる再循環経路部と、
前記再循環経路部で再循環する前記排気ガスの流量を調整する調整部と、
前記NOx選択還元型触媒の前記還元剤の吸着量に応じて、前記還元剤と、前記排気ガスに含まれる窒素酸化物との還元作用が促進されるように前記調整部を制御する制御部と、
を備える。
上記した排気浄化装置を備える。
内燃機関から生じた排気ガスが流れる排気管と、前記排気管内に配置され、還元剤を吸着することで前記排気ガス中の窒素酸化物を浄化処理するNOx選択還元型触媒と、前記排気ガスが流れる排気方向において前記NOx選択還元型触媒よりも前記排気管内の上流側に配置され、前記排気ガス中の窒素酸化物を吸蔵するNOx吸蔵還元型触媒と、前記排気管から前記内燃機関の吸気管と前記排気管とを接続し、前記排気管内の前記排気ガスを前記吸気管に再循環させる再循環経路部と、を有する排気浄化装置の排気浄化制御装置であって、
前記再循環経路部で再循環する前記排気ガスの流量を調整する調整部と、
前記NOx選択還元型触媒の前記還元剤の吸着量に応じて、前記還元剤と、前記排気ガスに含まれる窒素酸化物との還元作用が促進されるように前記調整部を制御する制御部と、
を備える。
アンモニアの推定吸着量=アンモニアの前回吸着量+供給アンモニア量−消費アンモニア量−アンモニア脱離量・・・(1)
NOxの吸蔵量=A+B×C−D−E・・・(2)
A:NOxの既吸蔵量
B:NOx吸蔵還元型触媒210の上流側のNOx濃度
C:NOx吸蔵還元型触媒210のNOx吸蔵効率
D:NOx吸蔵還元型触媒210から排出されるNOxの量
E:NOx吸蔵還元型触媒210から還元されるNOxの量
100 排気浄化装置
110 吸気管
120 排気管
130 第1温度検出部
140 第2温度検出部
150 尿素水噴射部
160 再循環経路部
161 調整部
210 NOx吸蔵還元型触媒
220 DPF
230 NOx選択還元型触媒
300 制御部
V 車両
Claims (10)
- 内燃機関から生じた排気ガスが流れる排気管と、
前記排気管内に配置され、還元剤を吸着することで前記排気ガス中の窒素酸化物を浄化処理するNOx選択還元型触媒と、
前記排気ガスが流れる排気方向において前記NOx選択還元型触媒よりも前記排気管内の上流側に配置され、前記排気ガス中の窒素酸化物を吸蔵するNOx吸蔵還元型触媒と、
前記排気管から前記内燃機関の吸気管と前記排気管とを接続し、前記排気管内の前記排気ガスを前記吸気管に再循環させる再循環経路部と、
前記再循環経路部で再循環する前記排気ガスの流量を調整する調整部と、
前記NOx選択還元型触媒の前記還元剤の吸着量に応じて、前記還元剤と、前記排気ガスに含まれる窒素酸化物との還元作用が促進されるように前記調整部を制御する制御部と、
を備える排気浄化装置。 - 前記NOx選択還元型触媒の前記還元剤の吸着量を推定する推定部を備える、
請求項1に記載の排気浄化装置。 - 前記推定部は、前記NOx吸蔵還元型触媒の窒素酸化物の吸蔵量を推定し、
前記制御部は、前記還元剤の吸着量が所定目標量より多い場合、前記推定部により推定された前記窒素酸化物の推定吸蔵量に基づいて、前記調整部を調整するか否かについて判定する、
請求項2に記載の排気浄化装置。 - 前記制御部は、前記推定吸蔵量が前記NOx吸蔵還元型触媒の所定吸蔵量未満である場合、前記排気ガスの前記吸気側に戻す流量を減少させる、
請求項3に記載の排気浄化装置。 - 前記排気ガスに含まれる粒子状物質を捕集する捕集部を備え、
前記制御部は、前記粒子状物質を燃焼させる再生処理が実行される際、前記調整部を制御する、
請求項1〜4の何れか1項に記載の排気浄化装置。 - 前記制御部は、前記再生処理が実行される際、前記排気管内の排気空燃比をリッチ状態にするリッチ処理を禁止する、
請求項5に記載の排気浄化装置。 - 前記制御部は、前記NOx吸蔵還元型触媒の温度に基づいて、前記調整部を制御するか否かについて判定する、
請求項1〜6の何れか1項に記載の排気浄化装置。 - 前記制御部は、前記NOx選択還元型触媒の温度に基づいて、前記調整部を制御するか否かについて判定する、
請求項1〜7の何れか1項に記載の排気浄化装置。 - 請求項1〜8の何れか1項に記載の排気浄化装置を備える、
車両。 - 内燃機関から生じた排気ガスが流れる排気管と、前記排気管内に配置され、還元剤を吸着することで前記排気ガス中の窒素酸化物を浄化処理するNOx選択還元型触媒と、前記排気ガスが流れる排気方向において前記NOx選択還元型触媒よりも前記排気管内の上流側に配置され、前記排気ガス中の窒素酸化物を吸蔵するNOx吸蔵還元型触媒と、前記排気管から前記内燃機関の吸気管と前記排気管とを接続し、前記排気管内の前記排気ガスを前記吸気管に再循環させる再循環経路部と、を有する排気浄化装置の排気浄化制御装置であって、
前記再循環経路部で再循環する前記排気ガスの流量を調整する調整部と、
前記NOx選択還元型触媒の前記還元剤の吸着量に応じて、前記還元剤と、前記排気ガスに含まれる窒素酸化物との還元作用が促進されるように前記調整部を制御する制御部と、
を備える排気浄化制御装置。
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JP2018041868A JP2019157667A (ja) | 2018-03-08 | 2018-03-08 | 排気浄化装置、車両および排気浄化制御装置 |
CN201980017347.8A CN111819349A (zh) | 2018-03-08 | 2019-03-07 | 废气净化装置、车辆以及废气净化控制装置 |
PCT/JP2019/009013 WO2019172357A1 (ja) | 2018-03-08 | 2019-03-07 | 排気浄化装置、車両および排気浄化制御装置 |
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JP2006017083A (ja) * | 2004-07-05 | 2006-01-19 | Toyota Motor Corp | 排気浄化装置の制御方法 |
JP2015014215A (ja) * | 2013-07-03 | 2015-01-22 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP2018021475A (ja) * | 2016-08-02 | 2018-02-08 | マツダ株式会社 | エンジンの排気浄化装置 |
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JP4542455B2 (ja) * | 2005-03-28 | 2010-09-15 | 三菱ふそうトラック・バス株式会社 | 内燃機関の排気浄化装置 |
JP4905327B2 (ja) * | 2007-11-13 | 2012-03-28 | トヨタ自動車株式会社 | 内燃機関の排気浄化システム |
JP2010112345A (ja) * | 2008-11-10 | 2010-05-20 | Mitsubishi Motors Corp | 排気浄化装置 |
JP2013241859A (ja) * | 2012-05-18 | 2013-12-05 | Isuzu Motors Ltd | 排気ガス浄化システム及び排気ガス浄化方法 |
JP6323354B2 (ja) * | 2015-01-30 | 2018-05-16 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
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JP2006017083A (ja) * | 2004-07-05 | 2006-01-19 | Toyota Motor Corp | 排気浄化装置の制御方法 |
JP2015014215A (ja) * | 2013-07-03 | 2015-01-22 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP2018021475A (ja) * | 2016-08-02 | 2018-02-08 | マツダ株式会社 | エンジンの排気浄化装置 |
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