1.前言侧置气门式L形燃烧室汽油机,是在1910～1930年之间发展起来的一种汽油机。那时汽油辛烷值较低,仅45～50左右,这种汽油机只能采用较低的压缩比(ε=4.5～5.0左右)。后来由于对爆燃本质的研究和气体扰动对爆燃影响认识的不断深入,里卡多对侧置气门式汽油机燃烧室进行了重大的改进,使这种汽油机的许用压缩比从4提高到4.8,动力性和经济性得到了明显的改善。1935年前后,随着汽油辛烷值的提高,这种汽油机的许用压缩比在小 1. Introduction Side-valve L-shaped combustion chamber gasoline engine, is a gasoline engine developed between 1910 and 1930. At that time the octane number of gasoline is low, only about 45 ~ 50, this kind of gasoline engine can only adopt the lower compression ratio (ε = 4.5 ~ 5.0 or so). Later, due to the research on the nature of deflagration and the deepening understanding of the influence of deflagration on gas disturbance, Ricardo made major improvements on the flaring-type gasoline engine combustion chamber, increasing the allowable compression ratio of this kind of gasoline engine from 4 to 4.8. Power and economy have been significantly improved. Before and after 1935, with the increase of octane number of gasoline, the allowable compression ratio of this kind of gasoline engine was small