Abstract
The piston top ring groove is required to be highly wear resistant because it is subject to load from the piton top ring under high temperature conditions. Although many reports have been made on the bottom side wear of the groove up to now, there was no knowledge on the top side. The present research involved extrapolating wear factors from the results of wear pattern observation. By conducting rig tests based on the design of experiments method, the sensitivity of each factor in wear on the top side of the ring groove was determined and wear due to impact was indicated as the determining factor in wear. In addition, simulation and testing indicated that changing the piston skirt form can reduce this piston behavior and so limit wear.
