JP4844467B2 - 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
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- JP4844467B2 JP4844467B2 JP2007122106A JP2007122106A JP4844467B2 JP 4844467 B2 JP4844467 B2 JP 4844467B2 JP 2007122106 A JP2007122106 A JP 2007122106A JP 2007122106 A JP2007122106 A JP 2007122106A JP 4844467 B2 JP4844467 B2 JP 4844467B2
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- exhaust
- exhaust gas
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- internal combustion
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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
- 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
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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- 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
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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
- F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
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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
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
-
- 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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
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- 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
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/25—Layout, e.g. schematics with coolers having bypasses
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- 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
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/33—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage controlling the temperature of the recirculated gases
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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)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
前記微粒子捕集フィルタ28は、排気微粒子(particulate matter:PM)を捕集除去するためのフィルタであり、例えば、コーディエライト等の柱状のフィルタ材料にハニカム状の多数の微細な通路を形成すると共に、その端部を交互に閉塞してなるウォールフローハニカム構造(いわゆる目封じ型)のフィルタが用いられている。
Claims (10)
- 内燃機関の排気通路に設置され排気微粒子を捕集する排気微粒子フィルタと、前記フィルタの上流側に設置される酸化触媒と、を備え、前記酸化触媒で生成させる二酸化窒素NO2により前記排気微粒子フィルタに捕集された排気微粒子を酸化除去する内燃機関の排気浄化装置において、
前記内燃機関の吸気系に還流させる排気の量及び温度を制御することで、前記排気微粒子フィルタの温度及び前記排気微粒子フィルタ中の二酸化窒素NO2の濃度を制御する再生制御手段を備えたことを特徴とする内燃機関の排気浄化装置。 - 前記再生制御手段が、還流排気の温度を変化させることによる排気還流率の変化を相殺するように、前記吸気系に還流させる排気の量を変化させることを特徴とする請求項1記載の内燃機関の排気浄化装置。
- 前記再生制御手段が、排気還流量を変化させることによる排気温度の変化を相殺するように、前記吸気系に還流させる排気の温度を変化させることを特徴とする請求項1又は2記載の内燃機関の排気浄化装置。
- 前記内燃機関の吸気系に還流させる排気還流通路と、該排気還流通路に介装されて前記吸気系に還流させる排気の量を制御する排気還流制御弁と、前記排気還流通路を介して還流される排気を冷却するクーラーと、該クーラーを迂回して排気を還流させる迂回路と、前記クーラーを通過させる排気量と前記クーラーを迂回させる排気量との比率を変化させる切替え弁と、を備え、
前記再生制御手段が、前記切替え弁によって前記比率を変化させることで、吸気系に還流させる排気の温度を制御し、前記排気還流制御弁によって吸気系に還流させる排気の量を制御することを特徴とする請求項1〜3のいずれか1つに記載の内燃機関の排気浄化装置。 - 前記再生制御手段が、前記排気微粒子フィルタの温度が目標温度よりも低い場合、前記切替え弁を制御して迂回路に流す排気量を増やし、かつ、前記排気還流制御弁の開度を増大させることで、排気還流率を略一定に保持して還流排気の温度を高め、排気温度を上昇させる一方、前記排気微粒子フィルタの温度が前記目標温度よりも高い場合、前記切替え弁を制御して迂回路に流す排気量を減らし、かつ、前記排気還流制御弁の開度を減少させることで、排気還流率を略一定に保持して還流排気の温度を低くし、排気温度を低下させることを特徴とする請求項4記載の内燃機関の排気浄化装置。
- 前記再生制御手段が、前記排気微粒子フィルタ中の二酸化窒素NO2濃度が目標濃度よりも低い場合、前記切替え弁を制御して迂回路に流す排気量を増やし、かつ、前記排気還流制御弁の開度を減少させることで、排気温度を略一定に保持して排気還流率を低下させて、前記内燃機関からのNOx排出量を増やし、前記排気微粒子フィルタ中の二酸化窒素NO2濃度が前記目標濃度よりも高い場合、前記切替え弁を制御して迂回路に流す排気量を減らし、かつ、前記排気還流制御弁の開度を増大させることで、排気温度を略一定に保持して排気還流率を増大させて、前記内燃機関からのNOx排出量を減らすことを特徴とする請求項4又は5記載の内燃機関の排気浄化装置。
- 前記再生制御手段により前記温度及び二酸化窒素NO2の濃度を制御しない状態での前記排気微粒子フィルタに対する排気微粒子の堆積速度、及び、前記再生制御手段により前記温度及び二酸化窒素NO2の濃度を制御した状態での前記排気微粒子フィルタに対する排気微粒子の堆積速度をそれぞれ推定し、前記再生制御手段により前記温度及び二酸化窒素NO2の濃度を制御することで、排気微粒子の堆積速度を低下させることができる場合に、前記再生制御手段の作動を許可する作動許可手段を設けたことを特徴とする請求項1〜6のいずれか1つに記載の内燃機関の排気浄化装置。
- 前記排気微粒子フィルタに対する排気微粒子の堆積速度を、前記排気微粒子フィルタに対する排気微粒子の流入速度と、前記排気微粒子フィルタにおける排気微粒子の酸化除去速度とから推定することを特徴とする請求項7記載の内燃機関の排気浄化装置。
- 前記排気微粒子の酸化除去速度を、前記排気微粒子フィルタの温度と、前記排気微粒子フィルタにおける排気微粒子の堆積量と、前記排気微粒子フィルタ中における二酸化窒素NO2の濃度とのうちの少なくとも1つから推定することを特徴とする請求項8記載の内燃機関の排気浄化装置。
- 前記排気微粒子フィルタにおける排気微粒子の堆積量が規定値を超えるときに、前記再生制御手段の作動を禁止して、排気中の未燃焼成分量を増やすことで排気温度を上昇させる強制昇温再生手段を備えたことを特徴とする請求項1〜9のいずれか1つに記載の内燃機関の排気浄化装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007122106A JP4844467B2 (ja) | 2007-05-07 | 2007-05-07 | 内燃機関の排気浄化装置 |
US12/056,870 US8127536B2 (en) | 2007-05-07 | 2008-03-27 | Exhaust gas cleaning apparatus |
EP08155690.4A EP1990511B1 (en) | 2007-05-07 | 2008-05-06 | Exhaust Gas Cleaning Apparatus |
CN2008100887787A CN101302952B (zh) | 2007-05-07 | 2008-05-07 | 排气净化装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2007122106A JP4844467B2 (ja) | 2007-05-07 | 2007-05-07 | 内燃機関の排気浄化装置 |
Publications (2)
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JP2008274896A JP2008274896A (ja) | 2008-11-13 |
JP4844467B2 true JP4844467B2 (ja) | 2011-12-28 |
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JP2007122106A Expired - Fee Related JP4844467B2 (ja) | 2007-05-07 | 2007-05-07 | 内燃機関の排気浄化装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8127536B2 (ja) |
EP (1) | EP1990511B1 (ja) |
JP (1) | JP4844467B2 (ja) |
CN (1) | CN101302952B (ja) |
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CN101302952B (zh) | 2011-07-20 |
US20080276604A1 (en) | 2008-11-13 |
EP1990511A3 (en) | 2009-11-04 |
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US8127536B2 (en) | 2012-03-06 |
JP2008274896A (ja) | 2008-11-13 |
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