一、前言活塞环与气缸套配合起密封作用,是活塞式发动机中最重要的也是最具有特性的摩擦付之一。发动机的机械摩擦力约有60～70％产生在活塞环与气缸套之间。有人指出,若能把摩擦功损失减少10％,就能把燃油耗量降低5％。而且,发动机的润滑油消耗量、使用寿命以及可靠性也都和活塞环有关,而这一切都和活塞环、气缸套之间的油膜状况有直接地联系。故设计活塞环不仅要从强度、张力分布曲线、材料选择以及表面镀复等方面考虑,而 First, the preamble Piston ring and cylinder liner with a sealing effect, is the most important piston engine is also one of the most features of the friction paid. About 60 to 70% of the mechanical friction of the engine is generated between the piston ring and the cylinder liner. Someone pointed out that if you can reduce the friction loss by 10%, you can reduce fuel consumption by 5%. Moreover, the engine oil consumption, service life and reliability are also related to the piston ring, and all this and the piston ring, the liner between the oil film conditions are directly linked. Therefore, the design of the piston ring not only from the strength, tension distribution curve, material selection and surface plating complex considerations, and so on