Analysis Of Ci Engine Performance By Thermal Barrier Coatings On Piston Under Different Cooling Rates

Abstract

To analyzeperformance of a twin cylinder four stroke CI engine whose piston is coated with a ceramic material and experiments are carried out at different cooling rates.Research& Development technique is used for decreasing costs and consumption offuel in internal combustion engines andtechnological innovation studies are going on continuously. Throughvarious constructional changesengine efficiency development efforts are augmentedday by day; for instance, parallel todevelopment of advanced technology ceramics, ceramic coating applications in IC engines grows fast. In order to get better engine performance, fuel energy must beconverted to machine energy at the most possible rate.Lower heat rejection from combustion chamber through thermally insulated components leads to increase in available energy that will raise the cylinder work and total energy carried by the engine exhaust, which could be also utilized.The research engine was a four-stroke, direct injection, twin cylinder, water cooled CI engine. It was tested at constant speed and different load conditions before coating. AlsoPiston was coated with0.5mm size  ofZirconia (ZrO2) over a 150 μm thickness of NiCrAlY bond coat.The engine was tested at standard conditions to study the effect of coated surfaces of piston on its performance and emissions of the engine. The ceramic-coated engine performanceis to be compared with conventional uncoated engine performance. Engine exhaust such as NOx CO, CO₂  and Unburned Hydro Carbons are to be determined with the aid of  exhaust gas analyzer by conducting several experimental cycles at various loads i.e., at 0.5,1,1.5,2,2.5& 3 K.W load after piston is coated by ceramic material.