Abstract
In order to examine the conformability of a piston ring installed in distorted cylinder bores, a three-dimensional dynamic contacts between the ring and the bore are analyzed. The penalty method is applied for the contact problem. The piston ring is modeled by elastic solid elements, and the ring groove and the cylinder bore are assumed to be rigid bodies and modeled by contact boundary elements as rigid body. The dynamic behavior of the ring is analyzed for two different bore deformations actually measured, respectively, and the clearance area occurring between the ring and the bore is examined. The results of the analysis are compared with the ring conformability criteria shown in the previous studies. The influence of the position of the closed gap and the rotation speed of the crank are also discussed.
