前言火花塞的污染是火花塞在使用中普遍存在的问题.绝大多数的火花塞是因污染而报废的.为了解决这一问题,不少火花塞工作者进行了专题研究,美国专利局于1984年1月24日出版了日本NGK火花塞公司发明的关于抗污火花塞专利(专利号为US4.27.9170).该专利除了在日本、美国申请外,还在英法等欧洲各国也申请了.从其多国申请的范围来说,它是一个具有重大参考价值的文献.而从其内容来说,又是一项简单可行的抗污措施,编译出 Preface Spark plug pollution is a common problem in the use of spark plugs.Most of the spark plugs are scrapped due to pollution.In order to solve this problem, a lot of spark plug workers conducted a special study, the United States Patent Office in January 1984 On the 24th, Japan NGK spark plug company invented the patent on the anti-pollution spark plug (Patent No. US 4.27.9170), which was filed in Japan, the United States and other European countries such as Britain, France and other countries. , It is a great reference value of the literature, but from its content, it is a simple and feasible anti-pollution measures compiled