摘要
为解决某轻型柴油机在开发试验过程中出现的活塞熔顶故障,采用故障树法分析可能导致故障的原因,分别通过试验、物理检测、标定逻辑分析等方法对各因素进行分析与排除,确定导致活塞熔顶故障的原因为:凸轮轴信号缺失触发单曲轴信号降级起动,倒拖起动转速过高造成电子控制单元试喷射功能误判,导致异常燃烧、产生高温熔顶。采取优化起动方式、设置关联报警等措施,耐久试验表明活塞熔顶故障不再发生。
In order to solve the piston top melting fault of a light diesel engine in the development and test process,the fault tree is used to list the factors that may cause the fault,and experiment,physical detection,calibration logic analysis,etc.,are used to analyze and eliminate the factors.It is determined that the cause of the piston top melting failure is that the lack of camshaft signal triggers the degraded start by single crankshaft signal,and the excessively high reverse starting speed will cause the ECU misjudgment of the test injection function.Then abnormal combustion and high-temperature molten roof happened.In order to avoid the recurrence of this fault,by optimizing the starting method and setting the associated alarms,the occurrence of the failure of the piston top molting is effectively avoided.
作者
吴士军
叶飞
刘斌
岳永丽
刘玲
WU Shijun;YE Fei;LIU Bin;YUE Yongli;LIU Ling(State Key Laboratory of Engine Reliability,Weifang 261061,China;Weichai Power Yangzhou Diesel Engine Co.,Ltd.,Yangzhou 225009,China;Weichai Power Co.,Ltd.,Weifang 261061,China)
出处
《内燃机与动力装置》
2021年第5期101-105,共5页
Internal Combustion Engine & Powerplant
关键词
熔顶
故障树法
单曲轴信号
试喷射
melt top
fault tree
single crankshaft signal
test injection
