| 基于缸盖振动的燃油喷射系统故障诊断 |
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| 引用本文： | 刘建敏,史玉鹏,许世永,贺立峰.基于缸盖振动的燃油喷射系统故障诊断[J].装甲兵工程学院学报,2011,25(3):29-34. |
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| 作者姓名： | 刘建敏 史玉鹏 许世永 贺立峰 |
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| 作者单位： | 1. 装甲兵工程学院训练部,北京,100072
2. 中国北方发动机研究所,山西大同,037036 |
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| 摘 要： | 对V型12缸柴油机缸盖振动燃烧段信号与缸内压力进行了时域对比,分析了失火时的缸盖振动响应,研究了供油规律随转速变化情况。分析表明缸盖振动中包含喷油器针阀落座的振动响应,研究了基于短时能量动态双阈值端点检测提取针阀落座响应时间特征的方法,利用振动信号的峰值加速度来表征针阀落座的强度。在不同工况及不同状态下提取了针阀落座时间及强度的振动特征,结果表明：振动特征能够有效反映针阀的工作情况,可以用于燃油喷射系统故障的诊断。
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| 关 键 词： | 针阀落座 缸盖振动 燃油系统 故障诊断 |
Fuel Injection System Fault Diagnosis Based on Cylinder Head Vibration Signal |
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| LIU Jian-min,SHI Yu-peng,XU Shi-yong,HE Li-feng.Fuel Injection System Fault Diagnosis Based on Cylinder Head Vibration Signal[J].Journal of Armored Force Engineering Institute,2011,25(3):29-34. |
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| Authors: | LIU Jian-min SHI Yu-peng XU Shi-yong HE Li-feng |
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| Institution: | LIU Jian-min1,SHI Yu-peng1,XU Shi-yong2,HE Li-feng2(1.Department of Training,Academy of Armored Force Engineering,Beijing 100072,China,2.China North Engine Research Institute,Datong 037036,China) |
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| Abstract: | This work focuses on combustion stage signal of 12-cylinder diesel engine cylinder head vibration.There is the vibratory response signal of fuel injector needle valve crash which is proved by the time domain analysis between cylinder head vibration and in-cylinder combustion pressure,analysis for cylinder head vibration of misfire and analysis of fuel feeding law change with engine rotating speed.The dynamic dual threshold values end point detection method can get the start time of the fuel injector needle ... |
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| Keywords: | fuel injector needle valve crash cylinder head vibration fuel injection system fault diagnosis |
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