| 柴油机SCR后处理控制策略开发与研究 |
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| 引用本文： | 杨建军,马杰,刘双喜,汪春华,栗国.柴油机SCR后处理控制策略开发与研究[J].汽车工程,2011,33(10). |
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| 作者姓名： | 杨建军 马杰 刘双喜 汪春华 栗国 |
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| 作者单位： | 中国汽车技术研究中心,天津,300162 |
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| 摘 要： | 为选择性催化还原技术提出了还原剂喷射的控制策略。它根据原机NOx排放浓度脉谱、排气温度和空速脉谱等计算还原剂的喷射速率。分别通过试验研究了NH3/NOx比值、排气温度和空速对NOx转化率和氨泄漏浓度的影响以及SCR催化剂的氨吸附和脱附特性,并根据研究结果,分别确定稳态和瞬态工况下尿素溶液喷射的控制方案,因而实现了ESC稳态循环和ETC瞬态循环下的控制目标。此外,冷机起动试验表明,该阶段的排气温度低,NOx排放浓度较高,故应采取措施减少低温工况下NOx的排放。
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| 关 键 词： | 柴油机 后处理 选择性还原 控制策略 |
The Development and Research on the SCR After Treatment Control Strategy of Diesel Engine |
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| Yang Jianjun,Ma Jie,Liu Shuangxi,Wang Chunhua,Li Guo.The Development and Research on the SCR After Treatment Control Strategy of Diesel Engine[J].Automotive Engineering,2011,33(10). |
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| Authors: | Yang Jianjun Ma Jie Liu Shuangxi Wang Chunhua Li Guo |
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| Institution: | Yang Jianjun,Ma Jie,Liu Shuangxi,Wang Chunhua & Li Guo China Automobile Technology and Research Center,Tianjin 300162 |
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| Abstract: | The control strategy of reducer injection for selective catalytic reduction(SCR) technology is proposed,in which the injection rate of reducer is calculated according to NOx emission concentration map,exhaust temperature and air velocity map of original engine.The effects of NH3/NOx ratio,exhaust temperature and air velocity on NOx conversion rate and NH3 slip concentration as well as the NH3 absorption and desorption characteristics of SCR catalyst are studied by respective tests.Based on the results the c... |
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| Keywords: | diesel engine after treatment selective catalytic reduction control strategy |
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