A Study on the Mechanism of Lubricating Oil Consumption of Diesel Engines -2nd report: Mechanism of Oil Film Generation on Piston Skirt-

The requirement for the reduction of lubricating oil consumption of diesel engines has become increasingly important in reducing the effect of exhausted oil on after treatment devices for exhaust gas. In our first report, findings indicated that piston skirt length affected oil consumption, and they clearly showed that the oil film on the piston skirt should be considered in the calculation for oil consumption. In this report, the mechanism of oil film generation on the piston skirt is investigated. The oil film on the piston skirt is calculated and the effect of piston motion on the oil film region is clarified, i.e., considering the piston rotation around the top of the piston skirt at the anti-thrust side is important for the calculation of the oil film region.