| 柴油机氧化催化转化器故障的排气参数敏感度分析 |
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| 引用本文： | 吕明,阎凯,宁智.柴油机氧化催化转化器故障的排气参数敏感度分析[J].车用发动机,2011(1):22-26. |
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| 作者姓名： | 吕明 阎凯 宁智 |
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| 作者单位： | 北京交通大学机电工程学院; |
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| 基金项目： | 国家自然基金资助项目(50876007); 北京市自然科学基金资助项目(3102024) |
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| 摘 要： | 为了将柴油机排气氧化催化转化器(DOC)的在线故障诊断技术应用于柴油机车载诊断系统(OBD),确定DOC在线故障诊断的特征参数,采用仿真的方法分析了柴油机排气参数对DOC故障的敏感度.研究结果表明,在一定的柴油机工况下,DOC前后的排气温度和排气背压对DOC催化剂老化、载体堵塞以及破损等失效故障都有很强的敏感度,可以作...
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| 关 键 词： | 柴油机 氧化催化转化器 故障诊断 敏感度 |
Analysis on Exhaust Parameter Sensitivity to DOC Faults |
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| LV Ming,YAN Kai,NING Zhi.Analysis on Exhaust Parameter Sensitivity to DOC Faults[J].Vehicle Engine,2011(1):22-26. |
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| Authors: | LV Ming YAN Kai NING Zhi |
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| Institution: | LV Ming,YAN Kai,NING Zhi(College of Mechanical and Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China) |
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| Abstract: | The sensitivity of exhaust parameters to DOC faults was analyzed by the simulation in order to apply the DOC online fault diagnosis technology to OBD system,and determine the characteristic parameters of online diagnosis.The results show that,under given operation conditions,the exhaust temperature and back pressure before and after DOC are very sensitive to catalyst aging,carrier cramming and disrepair,which can be used as the characteristic parameters of DOC fault diagnosis. |
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| Keywords: | diesel engine diesel oxidation catalyst(DOC) fault diagnosis sensitivity |
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