Study of Combustion Characteristics on Single Cylinder Direct Injection Diesel Engine with Plasma and HVOF Coated Ceramic Powders on Piston Crown

Abstract

Abstract Wear resistive and thermal barrier ceramic coating plays a vital role in the combustion and performance of diesel engines. The biodiesel extract from jatropha with methyl ester blends, were tested for their alternate resource in diesel engines. This paper is a study on the combustion characteristics, of a single cylinder direct injection diesel engine with the partially stabilized ZrO2 and Cr3C2 coatings over the piston crown for thermal performance and wear resistance. Biodiesel extract from jatrophais is used as blends to study on the combustion and performance characteristics of the diesel Engine. Experimental investigation on combustion characteristics, such as, heat release, peak pressure, ignition delay and brake thermal efficiency, is studied for varying loads 0%, 25%, 50%, 75%, 100% for both coated and uncoated piston. The biodiesel blends prepared from jatropha is prepared through esterification process (10-20 % by volume). From the combustion study, the results reveal that, combustion parameters (peak pressure and heat release) is improved by 10 % on a compression ratio, of 17.5 for the coated piston with jatropha biodiesel blends. In the comparison of varying volume % of jatropha and diesel the cylinder, pressure inceases at 20% JME blend for the coated piston in comparison to the uncoated piston, for the optimal compression ratio 17.5. The wear resistance characteristics proves, that the coated piston has a difference in wear depth 47 % of and total wear volume of 35% than the uncoated improving the tribological characterization of the piston.