Measurement and analysis of wear in the top piston ring of four stroke i c engine

Abstract

A wear in a piston ring assembly occurs as a consequence of the sliding newlinemovement between the piston ring and the cylinder liner of the I C Engine. The wear is dependent on the friction between a piston ring and a cylinder liner newlineleading to increased fuel consumption. An estimated direct and consequential newlineannual loss to the industries in the USA due to wear is approximately 1-2 % of newlineGDP. newlineFriction and wear are system responses of a Tribo system. Studies indicate newlinethat increase in friction leads to increase in wear. Frictional losses in any I C newlineEngine are observed between 17-19% of the total power produced by an newlineengine.As per the above referred total frictional losses, around 40-50% of the newlinefrictional losses are observed due to the piston ring assembly only. newlineThe present research is an effort towards analysing and quantifying wear newlinepattern along the circumference of the top piston ring of the Internal Combustion newlineengine. A random piston ring of Hero Honda Splendor was selected for the pilot newlinestudy. The study was conducted with the purpose of setting up a measurement newlinemethodology for the wear of piston ring along its circumference. A volumetric newlinewear of piston ring was calculated by comparing the volume of a worn piston newlinering with volume of new (unworn). The measurement methodology was newlinefinalized by measuring the random piston ring profile at 9 different angular newlinesections, constituting 8 sectors of piston ring. The piston ring profile was newlinemeasured over axial width of the worn-out piston ring at 13 different locations newlinealong the axial width for each of the 9 sections. A fixture was developed for newlinemeasuring the piston ring profile. The volume loss for each of the 8 sectors is newlinevi newlinecalculated by comparing piston ring profile of worn-out piston ring, with profile newlineof new piston ring of same type. newlineAn experimental setup constituting of a Hero Honda Splendor Engine was run newlinefor 200 hours. At the beginning of the experiment, the measurements for the newlinenew piston ring (assembled in the engine) were taken, as per the measurement newlinemethodology