本文探讨了矩形活塞环的稳定性和密封作用的理论。根据所定的分析法对1 15/16型柴油机活塞环稳定性和密封性能条件进行评定。事实证明,作用在活塞环的气体压力降不充足是引起环的密封作用发生动态破坏的主要条件,内燃机气缸内压力急剧增长的瞬间(压缩终了——燃烧开始)压力降 This paper discusses the theory of the stability and sealing of rectangular piston rings. According to the set of analytical methods for 1 15/16 diesel piston ring stability and sealing performance conditions were assessed. Facts have proved that the pressure acting on the piston ring is not sufficient pressure drop is caused by the sealing ring the main dynamic damage occurs, the internal combustion engine cylinder pressure increased sharply (compression end - the beginning of combustion) pressure drop