4 柴油机混合气形成和燃烧在柴油机工作循环的压缩行程后期,当活塞行将达到上止点时,柴油开始喷入气缸。这时在高压下喷射出来的燃油油束与气缸内的空气相碰撞而分散和雾化。燃油油滴被高温空气加强蒸发形成油气。油气与空气相混合,当达到一定的混合比例并且温度要在600℃以上时,就自行发生稳定的燃烧。这样一个从燃油喷射到完成燃烧的全过程叫做混合气形成和燃烧 4 Diesel Engine Mixture Formation and Combustion Diesel begins to be injected into the cylinder when the piston line will reach top dead center at the end of the compression stroke of the diesel engine’s working cycle. At this time, the fuel oil jet ejected under high pressure collides with the air in the cylinder to disperse and atomize. Fuel oil droplets by the high-temperature air to enhance evaporation to form oil and gas. Oil and air mixture, when a certain mixture ratio and the temperature to be above 600 ℃, on its own stable combustion. Such a whole process from fuel injection to complete combustion is called mixture formation and combustion