BLACK DIAMOND PISTON RING
Carbon reduction has become the issue which is discussed worldwide. Therefore more requests for engine have come up, not oil needs to save gasoline, but also reduce environmental pollution. For these requests, the key point is the wear of volume and sealing control action. However, DLC ring has the advantage of high hardness, low friction, which can increase wear resistance, reduce wear rate, decrease internal stress and extend life of piston rings, in which is the best choice regarding carbon reduction.