THE INFLUENCE OF THERMAL BARRIER COATING ON THE COMBUSTION AND EXHAUST EMISSION IN TURPENTINE OIL POWERED DI DIESEL ENGINE

Several methods of coatings are used to protect various structural engineering materials from corrosion, wear, and
erosion, and to provide lubrication and thermal insulation. Of these, Thermal barrier coatings (TBC) play the most
important role in coating of internal combustion engines particular to the combustion chamber. Insulation of the
combustion chamber components of low heat rejection (LHR) engines can reduce the heat transfer between the gases in the
cylinder and the cylinder wall and thus increase the combustion temperature. This study concentrates on low heat rejection
(LHR) engine in which yttria stabilized zirconia (YSZ) are coated to acquire the thermal barrier for the piston crown,
cylinder head and valves which will vary depends upon the functional graded material (FGM). A layer of aluminum oxide
coating is used to conduct extensive experiments in a single-cylinder Kirloskar TV 1 engine with every piston crown,
cylinder head and valves are coated with a layer of ceramic, which consists of zirconia and yttria with varying of thick
compositions. This study comprises about diesel blended with turpentine oil which is used in Engine performance
measurements. Therefore the characteristics of emissions and combustion were analysed before and after the application of
FGM coatings onto the piston crown of cylinder head and valves. To acquire more improved engine performance, cylinder pressure measurements were taken which provides direct comparison to cylinder pressure; maximum pressure and heat release diagrams between are figured to exhibit the base line which is coated with FGM.