基于声学信号的高压共轨柴油机工作粗暴诊断方法研究  

Research on Diagnostic Method of Rough Combustion Based on Acoustic Signals for HPCR Diesel Engine

作　　者：朱仲文[1] 谢辉[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《内燃机工程》2013年第6期25-30,共6页Chinese Internal Combustion Engine Engineering

基　　金：国家"八六三"高技术研究发展计划项目(2012AA111706)

摘　　要：采用时频联合分析的方法研究了柴油机正常燃烧和工作粗暴状态下声学信号的特点,定义了对正常燃烧和工作粗暴敏感的声学信号特征量,研究了特征量与燃烧模式之间的相关性。采用判别分析的方法建立了基于声学信号特征量的工作粗暴诊断模型。测试结果表明:工作粗暴诊断模型对柴油机正常燃烧和工作粗暴的正确辨识率超过85%。Using time-frequency joint analysis method,acoustic signal features in normal operating and rough combustion modes of high pressure common rail diesel engine were examined and the characteristic acoustic parameters for two modes and the correlation between these parameters and their combustion modes was conducted. The acoustic-signal-based model for rough combustion diagnosis was developed by employing discriminate analysis. Test results show that the model identification rate for rough combustion diagnosis is over 85 %.

关 键 词：内燃机 柴油机 声学信号 工作粗暴 诊断方法 

分 类 号：TK428[动力工程及工程热物理—动力机械及工程]