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本文首先介绍了用高速摄影机拍摄定容燃烧弹模拟分层充气发动机的燃烧过程。其次介绍拍摄燃烧室形状不同的直喷式汽油发动机气缸内的气体流动和燃烧过程。气体流动用外加白色膨化聚笨乙烯球形粒子示踪、粒子直径为1毫米,比重为0.256g/cm~3。通过对摄影胶片的判读分析,获得了重要的试验结果。文中还介绍了在同一画幅上同时记录气缸内示踪粒子运动或点火燃烧过程,以及表征活塞位置的飞轮转动标记的摄影光学系统。文章附有高速摄影得到的照片序列。
In this paper, the combustion process of a stratified charge combustion engine simulating a fixed volume combustion bomb shooting with a high-speed camera is firstly introduced. Second, introduce the gas flow and combustion process in the cylinder of direct injection gasoline engine with different combustion chamber shape. The flow of gas was traced with an additional white expanded polystyrene foam particle with a particle diameter of 1 mm and a specific gravity of 0.256 g / cm ~ 3. Through the interpretation of photographic film analysis, obtained important test results. The paper also introduces the photographic optical system that simultaneously records tracer particle motion or ignition and combustion in the same frame and marks the rotation of the flywheel at the piston position. The article is accompanied by a photo sequence of high-speed photography.