活塞环在汽车发动机中起着至关重要的作用。活塞环包括气环和油环两种。气环的作用是保证活塞与气缸壁间的密封,防止气缸中的高温、高压燃气大量窜入曲轴箱,同时还可将活塞顶部的大部分热量传导到气缸壁上,再由冷却液或空气带走,以保持发动机的热平衡;油环的作用是在随活 Piston rings play a crucial role in automotive engines. Piston ring includes both gas ring and oil ring. The role of the gas ring is to ensure that the seal between the piston and the cylinder wall to prevent the cylinder of high temperature and high pressure gas fled into the crankcase a lot, but also the top of the piston most of the heat conduction to the cylinder wall, and then by the coolant or air Take away to keep the engine’s thermal balance; the role of the oil ring is with the living