某新型发动机气缸磨损分析及优化设计  

Failure Analysis of Cylinder Wear for a New Diesel Engine and its Optimization

作　　者：温拾平 陈婷 王静楠[2] 郑朝升 罗剑坤 WEN Shiping;CHEN Ting;WANG Jingnan;ZHENG Chaosheng;LUO Jiankun(Tongji University,Shanghai,201804,China;-Jiangling Motors Co.,Ltd.;Jiangxi Institute of Economic Administrators)

机构地区：[1]同济大学,上海201804 [2]江铃汽车股份有限公司 [3]江西经济管理干部学院

出　　处：《小型内燃机与车辆技术》2024年第1期31-35,共5页Small Internal Combustion Engine and Vehicle Technique

摘　　要：某新型高强化发动机在设计开发过程中出现曲轴箱压力异常升高、窜气量大的问题。经故障再现和分析,确认故障原因为气缸局部异常磨损。通过成分检测、性能测试、热机耦合CAE对比分析,确定根本原因为气缸在高的热负荷、恶劣的润滑条件下承受复杂作用力而出现“抛光”现象。基于根本原因提出了优化设计方案,耐久试验结果表明,优化后的气缸状态良好,再未出现气缸“抛光”的问题。Abnormal increase of crankcase pressure and large gas channeling occurred during a new diesel engine development.After fault reappearance and analysis,it is confirmed that the failure was caused by abnormal wear of the cylinder.Through composition testing,performance testing and thermo-mechanical coupling CAE comparative analysis,it was confirmed that the high thermal load and poor lubrication conditions led to the cylinder wear.The optimization design was put forward based on the failure analysis.Durability test results show that the optimized cylinder is in good condition and there is no problem of cylinder polishing.

关 键 词：发动机 气缸磨损 优化设计 

分 类 号：U464.132[机械工程—车辆工程]