某型柴油机EGR阀异响故障分析及优化  

EGR Valve Abnormal Noise Analysis and Optimization on a Diesel Engine

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)

机构地区：[1]内燃机可靠性国家重点实验室,潍坊261061 [2]潍柴动力股份有限公司,潍坊261061 [3]潍柴动力扬州柴油机有限责任公司,扬州225009

出　　处：《内燃机与配件》2022年第4期106-108,共3页Internal Combustion Engine & Parts

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.

关 键 词：柴油机 异响 时频分析 EGR阀 

分 类 号：TK429[动力工程及工程热物理—动力机械及工程]