一、任务的提出活塞是柴油机的心脏部件之一。柴油机的经济性和可靠性在很大程度上与活塞顶的形状有关。一个成熟的柴油机,都有一个良好的燃烧室。L207E型柴油机活塞的结构形状有许多不足之处。特别是它的燃烧室外形,很不利于采用机械加工,只能用风砂轮靠手工打磨、工序复杂,要经过二次打磨、一次抛光、2～3次的容积测 First, the task of the proposed piston is one of the heart of the diesel engine parts. The economics and reliability of diesel engines are largely related to the shape of the piston crown. A mature diesel engine has a good combustion chamber. L207E diesel piston shape structure has many disadvantages. Especially its shape of the combustion chamber, it is not conducive to the use of mechanical processing, grinding only by hand wind grinding wheel, the process is complicated, to go through the second grinding, a polishing, volume measuring 2 to 3 times