This paper discusses on the strongpoints,shortcomings of the annular oxygen filling on vehicle ignition coil and its dehiscence problem in use.

• 主要论述汽车点火线圈环氧灌封料的优点、缺点及使用中的开裂问题,介绍其技术要求、材料分析、开裂原因分析及改进措施。