Enhancing Diesel Engine Performance and Balancing Emissions with Effect and Contribution of MgO-ZrO2 and AT13 Layered Piston

Abstract

Modern engines need to produce more efficiency in all aspects with low specific fuel consumption and lesser pollutions for environmental betterment. The purpose of this research work is to experimentally identify better thermal barrier coating and their impacts to enhance engine performance with lower specific fuel consumption. Piston crown of a single-cylinder diesel engine is coated with MgO-ZrO2 and Al2O3-13%TiO2 and tested under different loading conditions. The impact of thermal barrier coating performance and emissions compared with standard diesel engine characteristics is investigated. MgO-ZrO2 and Al2O3-13% TiO2 are selected as additional material to coat the piston crown because these materials are physically stable and thermal properties like low heat conductivity, high melting point and high thermal expansion are stable at high temperature. This experimental work has shown an increase in brake thermal efficiency of 32.1% for the TBC engine from 23.4% for the UC engine. Therefore, there is a decrease in brake-specific fuel consumption for TBC engine 0.27 kg/kWh from uncoated engine 0.37 kg/kWh at 9 kg of load decreased by 27.03%. It was observed from the heat balance sheet that the TBC engine useful work was increased by 3.5% compared with the uncoated engine which ultimately decreases the effect of gases like CO and HC due to an increase in the complete combustion by the thermal barrier coating.