Deterministic Modeling of Honed Cylinder Liner Friction

An experimental apparatus and an analytical model have been developed to investigate and determine the lubrication condition and frictional losses at the interface between a piston ring and a honed cylinder liner (PRCL). The experimental apparatus was used to measure the friction at the PRCL interface under various conditions. The analytical model developed to corroborate with experimental results includes the effects of boundary and mixed lubrication conditions using a fully deterministic approach. The procedure for analyzing the honed profile and generating a numerical equivalent for use in the mixed lubrication model is discussed. A comparison of measured and generated surfaces indicates that the model is capable of reproducing a honed cylinder liner surface profile with good accuracy. A comparison of experimental and analytical friction results shows good agreement. The model is used to analyze the effects of a cross-hatch angle on frictional behavior at the piston ring/cylinder liner contact.