JP4613894B2 - 内燃機関用排気浄化装置 - Google Patents
内燃機関用排気浄化装置 Download PDFInfo
- Publication number
- JP4613894B2 JP4613894B2 JP2006210651A JP2006210651A JP4613894B2 JP 4613894 B2 JP4613894 B2 JP 4613894B2 JP 2006210651 A JP2006210651 A JP 2006210651A JP 2006210651 A JP2006210651 A JP 2006210651A JP 4613894 B2 JP4613894 B2 JP 4613894B2
- Authority
- JP
- Japan
- Prior art keywords
- nox
- purge control
- internal combustion
- combustion engine
- nox catalyst
- 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.)
- Expired - Fee Related
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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
- 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
-
- 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
-
- 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
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
- F02D41/028—Desulfurisation of NOx traps or adsorbent
Description
Claims (3)
- 空燃比がリーンのときにNOxを吸蔵し、この吸蔵したNOxを空燃比がリッチのときに還元して放出するNOx触媒(33)を、内燃機関(1)の排気系に備え、
空燃比がリッチになるように前記内燃機関(1)に供給される燃料量を設定して還元用の燃料を前記NOx触媒(33)に供給する燃焼パージ制御と、前記NOx触媒(33)よりも上流側の前記排気系中に還元用の燃料を添加する排気添加パージ制御とを、前記NOx触媒(33)のNOx吸蔵量が閾値に達したときに前記内燃機関(1)の運転状態に応じて選択的に実行し、
前記燃焼パージ制御により前記NOx触媒(33)にて還元・放出されたNOx量に基づいて前記NOx触媒(33)の劣化度を判定する内燃機関用排気浄化装置において、
前記閾値として、前記燃焼パージ制御の実行を許可する第1閾値(Qnox2)と、前記排気添加パージ制御の実行を許可する第2閾値(Qnox3)とを設定するとともに、前記第1閾値(Qnox2)を前記第2閾値(Qnox3)よりも小さくしたことを特徴とする内燃機関用排気浄化装置。 - 前記NOx触媒(33)のNOx吸蔵量が0になるまで前記燃焼パージ制御が継続実行された場合に、前記NOx触媒(33)の劣化度を判定することを特徴とする請求項1に記載の内燃機関用排気浄化装置。
- 前記内燃機関(1)の始動直後、前記NOx触媒(33)のNOx吸蔵量が0になる前に前記燃焼パージ制御が中止された場合、および前記排気添加パージ制御を実行した直後のうち、少なくとも1つにおいて、
前記燃焼パージ制御が選択される前記内燃機関(1)の運転状態になったときには、前記NOx触媒(33)のNOx吸蔵量に関わらず前記燃焼パージ制御を実行することを特徴とする請求項1または2に記載の内燃機関用排気浄化装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006210651A JP4613894B2 (ja) | 2006-08-02 | 2006-08-02 | 内燃機関用排気浄化装置 |
US11/806,734 US7707823B2 (en) | 2006-08-02 | 2007-06-04 | Exhaust purification device for internal combustion engine |
DE102007000316.3A DE102007000316B4 (de) | 2006-08-02 | 2007-06-11 | Abgasreinigungsvorrichtung für eine Brennkraftmaschine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006210651A JP4613894B2 (ja) | 2006-08-02 | 2006-08-02 | 内燃機関用排気浄化装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008038645A JP2008038645A (ja) | 2008-02-21 |
JP4613894B2 true JP4613894B2 (ja) | 2011-01-19 |
Family
ID=38885070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006210651A Expired - Fee Related JP4613894B2 (ja) | 2006-08-02 | 2006-08-02 | 内燃機関用排気浄化装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7707823B2 (ja) |
JP (1) | JP4613894B2 (ja) |
DE (1) | DE102007000316B4 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5904191B2 (ja) * | 2013-10-31 | 2016-04-13 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP6547347B2 (ja) | 2015-03-18 | 2019-07-24 | いすゞ自動車株式会社 | 排気浄化システム |
JP2016173092A (ja) * | 2015-03-18 | 2016-09-29 | いすゞ自動車株式会社 | 排気浄化システム |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004052719A (ja) * | 2002-07-23 | 2004-02-19 | Toyota Motor Corp | 排気ガス浄化装置 |
JP2004211676A (ja) * | 2002-11-11 | 2004-07-29 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2836522B2 (ja) * | 1995-03-24 | 1998-12-14 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP2827954B2 (ja) * | 1995-03-28 | 1998-11-25 | トヨタ自動車株式会社 | NOx 吸収剤の劣化検出装置 |
JP4186259B2 (ja) * | 1998-07-17 | 2008-11-26 | 株式会社デンソー | 内燃機関の排ガス浄化装置 |
US6244046B1 (en) * | 1998-07-17 | 2001-06-12 | Denso Corporation | Engine exhaust purification system and method having NOx occluding and reducing catalyst |
US6560958B1 (en) * | 1998-10-29 | 2003-05-13 | Massachusetts Institute Of Technology | Emission abatement system |
FR2787037B1 (fr) * | 1998-12-09 | 2002-01-11 | Inst Francais Du Petrole | Procede et dispositif d'elimination des oxydes d'azote dans une ligne d'echappement de moteur a combustion interne |
US6568178B2 (en) * | 2000-03-28 | 2003-05-27 | Toyota Jidosha Kabushiki Kaisha | Device for purifying the exhaust gas of an internal combustion engine |
JP3858752B2 (ja) * | 2002-04-25 | 2006-12-20 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP2004068700A (ja) * | 2002-08-06 | 2004-03-04 | Toyota Motor Corp | 排気ガス浄化方法 |
JP4635860B2 (ja) * | 2005-12-20 | 2011-02-23 | 株式会社デンソー | 内燃機関の排気浄化装置 |
-
2006
- 2006-08-02 JP JP2006210651A patent/JP4613894B2/ja not_active Expired - Fee Related
-
2007
- 2007-06-04 US US11/806,734 patent/US7707823B2/en not_active Expired - Fee Related
- 2007-06-11 DE DE102007000316.3A patent/DE102007000316B4/de not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004052719A (ja) * | 2002-07-23 | 2004-02-19 | Toyota Motor Corp | 排気ガス浄化装置 |
JP2004211676A (ja) * | 2002-11-11 | 2004-07-29 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
Also Published As
Publication number | Publication date |
---|---|
DE102007000316B4 (de) | 2014-12-24 |
JP2008038645A (ja) | 2008-02-21 |
DE102007000316A1 (de) | 2008-02-07 |
US7707823B2 (en) | 2010-05-04 |
US20080028755A1 (en) | 2008-02-07 |
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