A study on the influence of cylinder liner distortion on piston ring kinetic characteristic and lubricating oil consumption

Abstract

This article studies the influence of cylinder liner distortion on piston ring kinetic characteristic and oil consumption on a single cylinder natural aspirated direct injection-diesel four-stroke engine. The distance between the groove and the piston ring is tested with the consideration of different cylinder liner distortions at different speeds when the oil thrown into the combustion chamber is also collected and measured during the operation with the application of the motoring test method. A conclusion can be drawn that oil thrown into the combustion chamber increases with the cylinder liner distortion getting more complex. The reason is that the sealing function of the ring is weakened with bad adherence of the ring to the cylinder liner when the distance between cylinder liner and piston ring increases.