本文在分析了272F 型侧置气门式汽油机(以下简称272F 型汽油机)L 型燃烧室的缺点后,根据热力循环的热效率公式,采用提高压缩比、燃用稀混合气、组织快速燃烧而研究出铲锹形燃烧室结构。经272F 与182F 两种机型试验及多年产品实际使用,从动力性、经济性、工作柔和平稳性,表明这种燃烧室用于侧置气门式汽油机有着良好的前景。 After analyzing the shortcomings of L-type combustion chamber of 272F-type side-valve gasoline engine (hereinafter referred to as 272F-type gasoline engine), based on the thermal efficiency formula of thermodynamic cycle, this paper studied the effects of increasing the compression ratio, burning lean mixture, Shovel shovel-shaped combustion chamber structure. The 272F and 182F two kinds of model tests and years of practical use of the product, from the power, economy, gentle work stability, indicating that this type of combustion chamber used for side-valve gasoline has a good prospect.