Browse Publications Technical Papers 2018-28-0052

Effect of Micro Texture on Tribological Performance of Piston Ring-Cylinder Liner System under different lubrication regimes 2018-28-0052

The main drawbacks of the IC engine are low thermal and mechanical efficiencies with a significant proportion of the fuel energy are dissipated as heat, and about 12% fuel energy is lost due to friction. Many research works are going on to reduce losses in IC engine, as even if reduction of 10% in total friction loss can be achieved it will results in 1.5% reduction in fuel consumption, which will ultimately give huge economic benefit. It has been recently identified, that optimally texturing of a tribological surface reduces friction and wear at sliding contact interfaces, as it act as a micro reservoir for lubricant and entrap wear particles. In present study this theory is utilized to reduce friction in piston ring-cylinder liner (PRCL) contact by using micro textured piston ring. Tribological performance of micro textured PRCL system will be investigated under medium passenger vehicle engine operating conditions using reciprocating tribometer test rig. Texturing will be done using laser surface texturing method. Segments of steel piston rings and grey cast iron cylinder liner will be used as test samples. Tests are performed with stroke length of 15mm and temperature will be maintained at 80°C. In order to simulate the different lubricating regimes the sliding speed will be varied, while the contact pressure will be kept constant at 4 MPa and PAO as lubricant. Wear volume is measured using 3D profilometer; SEM and EDX analylsis will be carrried to understand wear mechanisms.


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