摘要
本文针对某四缸直列轻型柴油机配套整车时,在长下坡路段,当柴油机点火开关关闭、排气制动开启时出现的柴油机异响问题进行系统分析,采用时频分析方法,结合柴油机性能变化情况,分析两者之间的关联性,确定异响根源来自于EGR阀本体,最后提供了两套EGR阀改进方案并进行了验证,试验表明最终改进方案效果非常明显,达到了消除异响目的。
In this article,abnormal noise is analyzed on a four-cylinder inline light diesel engine matched one vehicle when engine ignition is off and exhaust brake is on above long and steep downgrade sections.Analysis method,time frequency analysis,is used to analyze the relationship between engine performance parameter and abnormal noise,and the reason is ascertained that abnormal noise is from EGR valve.Finally,two improvement schemes were provided and verified.The test result showed the reduction effect of improvement scheme is very perfect,and the purpose of eliminating noise is achieved.
作者
史文献
黄国彧
吴士军
张军
SHI Wen-xian;HUANG Guo-yu;WU Shi-jun;ZHANG Jun(State Key Laboratory of Engine Reliability,Weifang 261061,China;Weichai Power Diesel Engine Co.,Ltd.,Weifang 261061,China;Weichai Power Yangzhou Diesel Engine Limited Liability Company,Yangzhou 225009,China)
出处
《内燃机与配件》
2022年第4期106-108,共3页
Internal Combustion Engine & Parts
关键词
柴油机
异响
时频分析
EGR阀
diesel engine
abnormal noise
time frequency analysis
EGR valve
