JP2011510202A - ディーゼルエンジン排出物質削減方法とディーゼルエンジンの背景および要約 - Google Patents
ディーゼルエンジン排出物質削減方法とディーゼルエンジンの背景および要約 Download PDFInfo
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- F02D—CONTROLLING COMBUSTION ENGINES
- F02D23/00—Controlling engines characterised by their being supercharged
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- F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system
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- 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
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
【選択図】図1
Description
23,23a ピストン
25,25a シリンダ
27,27a 燃料噴射器
29 可変形状タービン
31 排出口
33 コンプレッサ
35 流入口
37 制御装置
39,41 センサ
43 EGRシステム
45 EGRバルブ
47 EGR冷却器
51 ディーゼル酸化触媒
53 ディーゼル微粒子フィルタ
55 シャシ部品
57 迂回バルブ
59 可変絞り装置
Claims (25)
- 低負荷ディーゼルエンジン動作中に排出物質を制御するための方法であって、前記エンジンが、上死点および下死点位置の間においてシリンダ内で移動可能な少なくとも一つのピストンと、前記シリンダに燃料を噴射するための燃料噴射器と、前記エンジンからの排気が流れるのに適した可変形状タービンとを包含し、
前記エンジンを低負荷で作動させることと、
前記エンジンが低負荷で作動している状態でNOx排出物質レベルが制御されるように、可変形状タービン流入部開口サイズを制御することと、
を包含する方法。 - 低負荷において、前記ピストンにより駆動されるクランクシャフトが500〜2000rpmで運動する、請求項1に記載の排出物質制御方法。
- 可変形状タービン流入部開口サイズが、閉口タービンノズル間隙に少なくとも近似するまで縮小される、請求項1に記載の排出物質制御方法。
- 可変形状タービン流入部開口サイズが、最大タービンノズル間隙の0〜7.5%まで縮小される、請求項1に記載の排出物質制御方法。
- 前記エンジンの流入口および排出口の間に配置されたEGRバルブを備えるEGRシステムを前記エンジンが包含し、前記方法が、NOx排出物質レベルが制御されるように前記EGRバルブを開口することを包含する、請求項4に記載の排出物質制御方法。
- 前記EGRバルブの最大位置の25〜60%まで前記EGRバルブを開口することを包含する、請求項5に記載の排出物質制御方法。
- 前記ピストンの上死点の前で燃料を噴射することを包含する、請求項6に記載の排出物質制御方法。
- 前記シリンダの燃料噴射ノズル開口部での燃料噴射圧力を上昇させることを包含する、請求項7に記載の排出物質制御方法。
- 前記エンジンの流入口および排出口の間に配置されたEGRバルブを備えるEGRシステムを前記エンジンが包含し、前記方法が、NOx排出物質レベルが制御されるように前記EGRバルブを開口することを包含する、請求項1に記載の排出物質制御方法。
- エンジン排気の温度が上昇するように、可変形状タービン流入部開口サイズとEGRバルブ開口とを制御することを包含する、請求項9に記載の排出物質制御方法。
- 前記可変形状タービンの下流のディーゼル酸化触媒の境界温度までエンジン排気の温度が上昇するように、可変形状タービン流入部開口サイズとEGRバルブ開口とを制御する、請求項10に記載の排出物質制御方法。
- 前記ピストンの上死点の前で燃料を噴射することを包含する、請求項1に記載の排出物質制御方法。
- 前記エンジンの少なくとも一つのピストンの上死点の前において燃料を少なくとも5度で噴射することを包含する、請求項12に記載の排出物質制御方法。
- 前記シリンダの燃料噴射ノズル開口部における燃料噴射圧力を上昇させることを包含する、請求項1に記載の排出物質制御方法。
- 前記ピストンの上死点の前の位置から燃料噴射を早めることにより炭化水素および粒子状物質の排出物質を削減することを包含する、請求項1に記載の排出物質制御方法。
- 前記ピストンの上死点の前において燃料を少なくとも5度で噴射することを包含する、請求項15に記載の排出物質制御方法。
- 前記シリンダの燃料噴射ノズル開口部における燃料噴射圧力を上昇させることにより炭化水素および粒子状物質の排出物質を削減することを包含する、請求項15に記載の排出物質制御方法。
- 前記シリンダの燃料噴射ノズル開口部における燃料噴射圧力を上昇させることにより炭化水素および粒子状物質の排出物質を削減することを包含する、請求項1に記載の排出物質制御方法。
- 少なくとも一つのシャシパラメータを監視することと、前記シャシパラメータの変化の検出後に、前記可変形状タービン流入部開口サイズを高負荷動作用に調節することを含む、前記エンジンの高負荷動作への移行を開始することとを包含する、請求項1に記載の排出物質制御方法。
- 前記エンジンが多数のシリンダを有し、前記方法が、前記多数のシリンダのうち全部より少ないシリンダで燃焼が発生するように前記エンジンを作動させることを包含する、請求項1に記載の排出物質制御方法。
- エンジン流入口へ空気を吐出するための前記エンジン流入口の上流のコンプレッサを前記エンジンが包含し、前記方法が、前記コンプレッサから吐出された空気を前記エンジン流入口から方向転換することを包含する、請求項1に記載の排出物質制御方法。
- 前記エンジンが多数のシリンダを包含し、前記方法が、シリンダごとに異なるピストン位置で前記シリンダに燃料を噴射することを包含する、請求項1に記載の排出物質制御方法。
- 前記エンジンの排出口でNOx排出物質を測定することと、NOx排出物質レベルが制御されるようにNOx排出物質測定を受けて前記可変形状タービン流入部開口サイズを制御することとを包含する、請求項1に記載の排出物質制御方法。
- 上死点および下死点位置の間においてシリンダ内で移動可能な少なくとも一つのピストンと、
前記シリンダへ燃料を噴射するための燃料噴射器と、
エンジン排気が流れるのに適した可変形状タービンと、
前記エンジンの排出口でNOx排出物質を測定するためのセンサと、
NOx排出物質レベルが制御されるようにNOx排出物質の測定を受けて前記エンジンの低負荷動作中に可変形状タービン流入部開口サイズを制御するように構成された制御装置と、
を包含するディーゼルエンジン。 - 前記エンジンの流入口および排出口の間に配置されたEGRバルブを備えるEGRシステムを包含し、前記制御装置が、NOx排出物質レベルが制御されるように前記EGRバルブを開口するように構成される、請求項24に記載のディーゼルエンジン。
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PCT/US2008/050466 WO2009088506A1 (en) | 2008-01-08 | 2008-01-08 | Method for reducing diesel engine emissions, and diesel engine |
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JP2013104317A (ja) * | 2011-11-10 | 2013-05-30 | Hitachi Automotive Systems Ltd | エンジンの制御装置 |
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US8938962B2 (en) | 2012-01-31 | 2015-01-27 | Caterpillar Inc. | Exhaust system |
CN102691571A (zh) * | 2012-05-22 | 2012-09-26 | 清华大学 | 一种内燃机气缸及其气缸内NOx还原并二次做功的方法 |
US9181882B2 (en) * | 2012-10-31 | 2015-11-10 | Ford Global Technologies, Llc | Emissions control during an automatic engine restart |
US10094324B2 (en) * | 2013-05-30 | 2018-10-09 | General Electric Company | System and method of operating an internal combustion engine |
US10166988B1 (en) * | 2017-12-04 | 2019-01-01 | GM Global Technology Operations LLC | Method and apparatus for controlling an internal combustion engine |
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EP2240673A4 (en) | 2011-12-14 |
EP2240673B1 (en) | 2021-03-17 |
EP2240673A1 (en) | 2010-10-20 |
CN101990595B (zh) | 2013-04-10 |
CN101990595A (zh) | 2011-03-23 |
US8528329B2 (en) | 2013-09-10 |
US20100300089A1 (en) | 2010-12-02 |
WO2009088506A1 (en) | 2009-07-16 |
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