某乘用车柴油机水温高和溢水壶溢水问题的失效分析及解决措施  

Failure Analysis and Corrective Actions of High Cooling Liquid Temperature and Water Overflow of Overflow Canteen of Diesel Engine for Passenger Car

作　　者：张伟[1,2] 段丽丽[1,2] 左偲琦 赵国东[1,2] 柴晓娜[1,2] 

机构地区：[1]长城汽车股份有限公司技术中心,河北保定071000 [2]河北省汽车工程技术研究中心

出　　处：《小型内燃机与车辆技术》2016年第4期91-96,共6页Small Internal Combustion Engine and Vehicle Technique

摘　　要：乘用车用某四缸涡轮增压柴油机在试验过程中出现气缸盖裂纹问题。为解决此问题,首先对裂纹形态进行分析,进而对可能造成裂纹的原因逐一排查,再通过仿真分析、对标分析、试验验证等方法对问题真因进行确认。结果表明:气缸盖整体刚度低及局部结构薄弱导致裂纹处疲劳安全系数低为裂纹产生的原因。针对气缸盖裂纹问题,制定了提高气缸盖整体结构刚度、优化局部结构强度的整更改措施。经过仿真分析和试验验证,确认整改措施可以有效避免气缸盖裂纹的发生。This paper introduces a local diesel engine failure mode about cooling liquid temperature exceeding heat limit value（95 ℃）, and water overflowing of overflow canteen. Using of quality tool cause and effect analysis diagram, analyzing direction is defined. Combing the failure phenomenon, checking the whole car cooling system and engine parts, finally it＇s targeted that the cylinder head gasket expiration is the main reason. Then effective measures for the expiring reason of the cylinder head gasket had been made,so the issues that water temperature exceeded heat limit value and water overflowing from overflow canteen were solved.

关 键 词：柴油机 溢水壶溢水 水温高 气缸盖垫片 失效分析 整改对策 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]