Fullerene C60 Versus Synthetic Based Oils on Compression Piston Ring Tribology

This study examines the effectiveness of C60 fullerenes as additives to improve lubricant performance in piston ring–cylinder liner tribological systems. Viscosity measurements of synthetic and fullerene-based oils were performed using a capillary tube viscometer under varying temperature and pressure. The data were incorporated into a CFD model of compression piston ring to assess friction, cavitation, and hydrodynamic pressure. Cavitation effects were also investigated and commented on. Results show that fullerene-enhanced lubricants retain higher viscosity at elevated temperatures and reduce friction force, enhancing engine efficiency and emission characteristics.