发动机排气歧管断裂分析  

Fracture Analysis on Engine Exhaust Manifold

作　　者：李伟[1] 刘柯军[1] 张义和[1] 邹德志[1] 

机构地区：[1]第一汽车集团公司技术中心,吉林长春130011

出　　处：《汽车工艺与材料》2006年第6期25-26,共2页Automobile Technology & Material

摘　　要：近年来,由于防止废气污染、噪声及提高燃油效率的需要,发动机气缸的排气温度不断提高,以及因超载和路况等原因引起发动机超负荷运行,导致排气歧管的热疲劳开裂时有发生。对某车型发动机排气歧管的热疲劳断裂问题进行综合失效分析,并从材料、结构方面提出改进意见。In recent years the thermal fatigue crack of exhaust manifold often happened occurs as a result of increased engine exhaust temperature owing to the requirements of reducing emissions and noise pollution and improving fuel economy,and owing to overload operation of engine caused by overload of vehicle and bad road conditions.This paper gives a comprehensive failure analysis on the thermal fatigue crack of engine exhaust manifold and makes an improvement for materials and structures.

关 键 词：发动机 排气歧管 失效分析 

分 类 号：U464.134.4[机械工程—车辆工程] TK407[交通运输工程—载运工具运用工程]