JP4438662B2 - 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
- JP4438662B2 JP4438662B2 JP2005092514A JP2005092514A JP4438662B2 JP 4438662 B2 JP4438662 B2 JP 4438662B2 JP 2005092514 A JP2005092514 A JP 2005092514A JP 2005092514 A JP2005092514 A JP 2005092514A JP 4438662 B2 JP4438662 B2 JP 4438662B2
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- JP
- Japan
- Prior art keywords
- reducing agent
- amount
- addition valve
- agent addition
- pressure
- 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.)
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Classifications
-
- 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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/05—Systems for adding substances into exhaust
-
- 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
Landscapes
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
9 排気通路
15 排気浄化触媒
20 還元剤添加弁
21 還元剤供給通路
23 加圧ポンプ(供給圧力調整手段)
30 ECU(還元剤添加制御手段、圧力低下量判定手段、還元剤添加補正手段)
Claims (2)
- 内燃機関の排気通路に設けられて還元剤の存在下で排気中の有害成分を浄化する排気浄化触媒と、前記排気浄化触媒の上流に還元剤を噴射する還元剤添加弁と、前記還元剤添加弁に還元剤を供給する還元剤供給通路と、前記還元剤供給通路に設けられて前記還元剤添加弁に対する還元剤の供給圧力を調整する供給圧力調整手段と、前記還元剤添加弁から還元剤を噴射させる必要がある場合、前記内燃機関の排気空燃比が目標値に到達するように、前記還元剤添加弁が噴射する還元剤の量及び前記供給圧力調整手段が調整する前記供給圧力をそれぞれ制御する還元剤添加制御手段と、を備え、
前記還元剤添加制御手段は、前記還元剤添加弁から還元剤を噴射させた際に前記排気空燃比が前記目標値に到達しない場合において還元剤の噴射に伴う前記還元剤供給通路内の圧力低下量が正常か否かを判定する圧力低下量判定手段と、前記圧力低下量判定手段にて前記圧力低下量が正常でないと判定されたときに前記還元剤添加弁の詰まりを判断して前記供給圧力調整手段が調整する前記供給圧力を増圧補正する一方で、前記圧力低下量判定手段にて前記圧力低下量が正常であると判定されたときに還元剤の不足を判断して前記還元剤添加弁が噴射する還元剤の量を増量補正する還元剤添加補正手段と、を備えることを特徴とする内燃機関の排気浄化装置。 - 前記還元剤添加制御手段は、前記還元剤添加弁による還元剤の噴射が複数回の噴射に分けられるように前記還元剤添加弁の動作を制御するものであり、
前記還元剤添加補正手段は、還元剤の量を増量補正する場合に前記複数回の噴射のそれぞれの噴射量を増量させるとともに、前記供給圧力を増圧補正する場合に前記複数回の噴射のそれぞれの前記供給圧力を増圧させることを特徴とする請求項1に記載の内燃機関の排気浄化装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005092514A JP4438662B2 (ja) | 2005-03-28 | 2005-03-28 | 内燃機関の排気浄化装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005092514A JP4438662B2 (ja) | 2005-03-28 | 2005-03-28 | 内燃機関の排気浄化装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006274856A JP2006274856A (ja) | 2006-10-12 |
JP4438662B2 true JP4438662B2 (ja) | 2010-03-24 |
Family
ID=37209862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005092514A Expired - Fee Related JP4438662B2 (ja) | 2005-03-28 | 2005-03-28 | 内燃機関の排気浄化装置 |
Country Status (1)
Country | Link |
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JP (1) | JP4438662B2 (ja) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4906525B2 (ja) | 2007-01-26 | 2012-03-28 | ボッシュ株式会社 | 還元剤噴射弁の詰まり判定装置及び還元剤噴射弁の詰まり判定方法 |
JP4165896B2 (ja) | 2007-02-19 | 2008-10-15 | ボッシュ株式会社 | 還元剤経路の詰まり判定装置及び還元剤経路の詰まり判定方法 |
JP5142048B2 (ja) * | 2008-04-08 | 2013-02-13 | 株式会社デンソー | 内燃機関の排気浄化装置 |
JP2014034925A (ja) * | 2012-08-09 | 2014-02-24 | Nippon Shokubai Co Ltd | 窒素酸化物の除去方法 |
JP6122629B2 (ja) * | 2012-12-12 | 2017-04-26 | ボルボトラックコーポレーション | エンジンの排気管噴射装置 |
JP6036634B2 (ja) * | 2013-10-08 | 2016-11-30 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP2015151978A (ja) * | 2014-02-18 | 2015-08-24 | 株式会社デンソー | 排気浄化装置の制御装置 |
GB2537598B (en) * | 2015-04-13 | 2017-09-13 | Perkins Engines Co Ltd | Method of controlling an engine system |
CN109681304A (zh) * | 2018-12-25 | 2019-04-26 | 上海星融汽车科技有限公司 | 一种scr系统尿素喷嘴堵塞识别方法 |
CN112879134A (zh) * | 2021-01-25 | 2021-06-01 | 凯龙高科技股份有限公司 | 一种非气助式尿素喷嘴堵塞诊断及自修复控制装置及方法 |
-
2005
- 2005-03-28 JP JP2005092514A patent/JP4438662B2/ja not_active Expired - Fee Related
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JP2006274856A (ja) | 2006-10-12 |
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