An important parameter in the reduction of fuel consumption of heavy-duty diesel engines is the Power Cylinder Unit (PCU); the\nPCU is the single largest contributor to engine frictional losses.Much attention, fromboth academia and industry, has been paid to\nreducing the frictional losses of the PCU in the boundary and mixed lubrication regime.However, previous studies have shown that\na large portion of frictional losses in the PCU occur in the hydrodynamic lubrication regime. A novel texturing design with large\ntypes of surface features was experimentally analyzed using a tribometer setup.Theexperimental result shows a significant reduction\nof friction loss for the textured surfaces. Additionally, the textured surface did not exhibit wear. On the contrary, it was shown that\nthe textured surfaces exhibited a smaller amount of abrasive scratches on the plateaus (compared to the reference plateau honed\nsurface) due to entrapment of wear particles within the textures. The decrease in hydrodynamic friction for the textured surfaces\nrelates to the relative increase of oil film thickness within the textures. A tentative example is given which describes a method of\ndecreasing hydrodynamic frictional losses in the full-scale application.
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