Experimental Investigation on Improving Performance Of I.C. Engine by Varying Advance Piston Coating Materials

Internal combustion Engine & Automobile(I.C.E. & AUTO)

Experimental investigation is carried out under different loading conditions in a Single cylinder diesel engine with its piston crown were coated with NiAl (bond coat) of 50µm thickness and Chromium oxide (Top Coat) of 300µm thickness each by using Robotic Plasma spray coating technique to understand the influence of the thermal barrier coating (TBC) on performance and emission characteristics in comparison with baseline engine characteristics. Cr 2 O 3 is chosen as the candidate material for coating the piston crown because of its desirable physical properties such as high coefficient of thermal expansion, low thermal conductivity, high Poisson’s ratio, and stable phase structure at higher temperature conditions. For the measurement of emission characteristics, ISO Mode testing cycle procedure is followed. Experimental results revealed that the thermal efficiency is increased by 16.8 % with reduction of brake specific fuel consumption by up to 6.9 %. Experimental results also revealed that Hydro carbon (HC) emission is reduced up to 18.95 %, carbon monoxide (CO) by up to 11.72 % and Carbon dioxide (CO 2 ) emission is increased by up to 21.5%.

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