JP5288055B1 - 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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- JP5288055B1 JP5288055B1 JP2012529046A JP2012529046A JP5288055B1 JP 5288055 B1 JP5288055 B1 JP 5288055B1 JP 2012529046 A JP2012529046 A JP 2012529046A JP 2012529046 A JP2012529046 A JP 2012529046A JP 5288055 B1 JP5288055 B1 JP 5288055B1
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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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction 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
- 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
- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0821—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—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
- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
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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
- F01N3/24—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
- F01N3/36—Arrangements for supply of additional fuel
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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
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/06—Exhaust treating devices having provisions not otherwise provided for for improving exhaust evacuation or circulation, or reducing back-pressure
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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
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of 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
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
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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
- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
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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)
- Materials Engineering (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
3 燃料噴射弁
13 排気浄化触媒
15 炭化水素供給弁
50 触媒担体
51,52 触媒粒子
54 触媒担体
55,56 触媒粒子
57 塩基性層
58 排気流通表面部分
61 上流側触媒
61a 上流側基体
61b 上流側容器
61c 軸線
62 下流側触媒
62a 下流側基体
62b 下流側容器
62c 軸線
65 空間
69 隙間部
Claims (8)
- 機関排気通路内に排気に含まれるNOXと炭化水素とを反応させるための排気浄化触媒を備え、排気浄化触媒は、機関排気通路に直列に接続された上流側触媒と下流側触媒とを含み、上流側触媒は酸化能力を有し、下流側触媒は、排気流通表面上に貴金属の触媒粒子が担持されていると共に触媒粒子の周りには塩基性の排気流通表面部分が形成されており、
排気浄化触媒は、排気浄化触媒に流入する炭化水素の濃度を予め定められた範囲内の振幅および予め定められた範囲内の周期でもって振動させると排気中に含まれるNOXを還元する性質を有すると共に、炭化水素濃度の振動周期を前記予め定められた範囲よりも長くすると排気中に含まれるNOXの吸蔵量が増大する性質を有しており、
機関運転時に排気浄化触媒に流入する炭化水素の濃度を前記予め定められた範囲内の振幅および前記予め定められた範囲内の周期でもって振動させ、排気中に含まれるNOXを排気浄化触媒において還元する制御を行なうように形成されており、
上流側触媒は、触媒粒子が担持された上流側基体と、上流側基体を収容する上流側容器とを含み、排気に含まれる炭化水素を部分酸化し、部分酸化された炭化水素を下流側触媒に供給し、
下流側触媒は、触媒粒子が担持された下流側基体と、下流側基体を収容する下流側容器と、下流側基体と下流側容器との間の隙間部により形成された排気の流路とを含み、
上流側容器は、下流側容器に接続されており、
上流側基体から流出する部分酸化された炭化水素を含む排気が下流側容器の内部において複数の方向に向かって分割され、
分割された排気は、下流側基体と下流側容器との間の流路を流通した後に合流することにより混合され、混合された排気が下流側基体に流入することを特徴とする、内燃機関の排気浄化装置。 - 上流側基体の排気が流入する端面の面積は、下流側基体の排気が流入する端面の面積よりも小さく形成されている、請求項1に記載の内燃機関の排気浄化装置。
- 上流側容器は、下流側容器の周方向の表面に接続されており、
上流側基体は、上流側基体から流出した排気が下流側基体の周方向の外面に向かうように配置され、
上流側基体から流出した排気が下流側基体の周方向の外面において複数の方向に分割される、請求項1に記載の内燃機関の排気浄化装置。 - 上流側触媒は、貴金属の触媒粒子を有し、排気に含まれる炭化水素を部分酸化し、部分酸化した炭化水素を下流側触媒に供給する、請求項1に記載の内燃機関の排気浄化装置。
- 上流側基体は、排気の通路に沿って延びる軸線を有し、
下流側基体は、排気の通路に沿って延びる軸線を有し、
上流側基体は、上流側基体から流出する排気が下流側基体の出口側の端部に向かうように、上流側基体の軸線が下流側基体の軸線に対して傾斜するように配置されている、請求項1に記載の内燃機関の排気浄化装置。 - 上流側基体の排気が流入する端面の面積は、下流側基体の排気が流入する端面の面積よりも小さく形成されている、請求項5に記載の内燃機関の排気浄化装置。
- 上流側容器は、下流側容器の周方向の表面に接続されており、
上流側基体は、上流側基体から流出した排気が下流側基体の周方向の外面に向かうように配置され、
上流側基体から流出した排気が下流側基体の周方向の外面において複数の方向に分割される、請求項5に記載の内燃機関の排気浄化装置。 - 上流側触媒は、貴金属の触媒粒子を有し、排気に含まれる炭化水素を部分酸化し、部分酸化した炭化水素を下流側触媒に供給する、請求項5に記載の内燃機関の排気浄化装置。
Applications Claiming Priority (1)
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PCT/JP2011/075849 WO2013069115A1 (ja) | 2011-11-09 | 2011-11-09 | 内燃機関の排気浄化装置 |
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JP5288055B1 true JP5288055B1 (ja) | 2013-09-11 |
JPWO2013069115A1 JPWO2013069115A1 (ja) | 2015-04-02 |
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Country Status (5)
Country | Link |
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US (1) | US9097157B2 (ja) |
EP (1) | EP2626529B1 (ja) |
JP (1) | JP5288055B1 (ja) |
CN (1) | CN103958842B (ja) |
WO (1) | WO2013069115A1 (ja) |
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JP6420158B2 (ja) * | 2015-01-08 | 2018-11-07 | フタバ産業株式会社 | 排気浄化装置 |
JP2016148259A (ja) * | 2015-02-10 | 2016-08-18 | トヨタ自動車株式会社 | 排気浄化装置 |
JP6729721B2 (ja) * | 2016-12-16 | 2020-07-22 | マツダ株式会社 | エンジンの排気装置 |
JP6319412B1 (ja) * | 2016-12-16 | 2018-05-09 | マツダ株式会社 | エンジンの排気装置 |
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