A study on the effect of factors of piston motion on the piston ring rotation of an engine

Abstract

Oil consumption of an engine causes particulate matter, catalyst poisoning, and sometimes abnormal combustion such as pre-ignition. One of the factors in oil consumption is oil transport upward through the ring gap in a piston. When the rings rotate and the ring gaps meet and stay a certain position, hence the gaps line up, it is assumed that so more oil can transfer upward. The effect of the piston motion on ring rotation is investigated in authors’ past study using three types of rig testers which represent lateral, up-and-down, and tilting motions of a piston respectively, and force acting on the piston ring in the circumferential direction is measured. The results show that the lateral and the up-and-down motion cause the piston ring rotation. In this study, the effect of the interaction between those piston motions on the rotational force was investigated. It was found that three components of the piston motion showed an interactive effect on the piston ring rotation.