Effect of Cylinder Liner Wear on Oil Consumption in Heavy Duty Diesel Engines

Abnormal cylinder liner wear is cause of the gradual increase in lube oil consumption in diesel engines. The mechanism of the cylinder liner wear was examined using an L-link piston motion measurement device, and the carbon deposit buildup on the top land of the piston was found to be the cause of the wear. Piston top land cutback was proven theoretically and practically to be a useful tool to prevent wear. Other factors also influencing the wear were taken into consideration in view of the severe demands of future engines.