Diesel Engine Oil Consumption Depending on Piston Ring Motion and Design

To reduce the oil consumption in diesel engines, the combination of top ring gap clearance (C₁) and second ring gap clearance (C₂) (ring gap balance) was applied. The effect of the ring gap balance on piston ring axial motion and second land pressure was observed and factors to control oil consumption were analyzed.

The authors obtained a technique to reduce oil consumption by decreasing second land pressure and thus making second ring liable to lift off. Blow up gas was significantly concerned about oil consumption of blow-by gas.