IMPROVEMENT IN ENGINE PARAMETER’S
The primary objectives that we like to achieve by adiabatizing the engine cylinder by using Thermal Barrier Coatings (TBC) are as follows:
● To increase the thermal efficiency of the engine.
● To increase the temperature of combustion in the engine cylinder for complete combustion.
● To reduce the fuel consumption.
● To reduce the exhaust emission gases.
● To increase the performance of the engine.
● To find which coating among ZrO2 and TiO2 gives better adiabatization of the engine.
3. EXPERIMENTAL TESTING
1. Engine testing with and without coated piston.
2. Comparison of results with & without coating.
3. Tabulation and Generating graphical representations.
A two-stroke, single cylinder, and air-cooled petrol engine is selected to conduct the study. The engine is to be tested for its performance at various operating conditions without piston crown coating. Then the surface of the piston crown is coated with two different TBCs materials. Four pistons are selected for TBCs two pistons (P2, P3) are coated with ZrO2 of various thicknesses as given in table. The other two pistons (P4, P5) are coated with TiO2 of various thicknesses as given in table. The coating process is performed using the plasma spray technique. The engine is to be tested for its performance at various operating conditions. The results for both cases are to be analysed and then compared.
Fig.1: The Experimental Setup
Table.1: Coating Thickness of Materials Used
3.1 PLASMA SPRAY PROCESS
The plasma spraying process uses a DC electric arc to generate a stream of high temperature ionised plasma gas, which acts as the spraying heat source. The coating material, in powder form, is carried in an inert gas stream into plasma jet where it is heated and propelled towards the substrate. Because of the high temperature and high thermal energy of plasma jet, material with high melting points can be sprayed.
Using the plasma spray process the TBC materials where sprayed on to the head of the piston at various thickness as mentioned in the above table.[2] [3]
4. PISTON& COATING MATERIALS
4.1 ALUMINIUM
The principleuses of aluminium are for aircraft, machinery, electrical conductors, and cooking utensils. Aluminium has largely created its own uses, 791
International Journal of Engineering Research & Technology (IJERT)
ISSN: 2278-0181
www.ijert.org
Vol. 2 Issue 6, June - 2013
IJERT