Experimental Investigation of Friction Coefficient Between Piston Ring-Cylinder Liner of Internal Combustion Engines with Taguchi Method

Abstract

The purpose of this study was to investigate the effects of various parameter on friction coefficient between piston ring and cylinder liners in an internal combustion engine. Fuel contamination type, fuel contamination ratio, load, cycle speed and temperature parame-ters are chosen as three levels; cylinder shell surface condition parameter is two levels. A tribotester device is manufactured for purpose of examining friction coefficient between piston ring and cylinder liner. Friction coefficients were measured by a three-axis force sensor. Taguchi (L-18) orthogonal array was used to obtain the best combination of working para-meters for the most efficient reduction of friction coefficient. Numbers of experiments were reduced from 8748 to 18 by using the Taguchi method. In addition, the analysis of variance was performed to determine the effect of each parameter. Experimental results showed that mixed fuel oil into the lubricating system have been found as a significant effect on friction behavior.