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Efficiency Analysis of a Copper Coated SI Engine using Normal and HHO blended Gasoline under Various Loads

P.T.Aravindhan, P.T.Anandhan

This paper reports performance evaluation of two stroke, single cylinder S park Ignition engine (copper of thickness 300 μ is coated on piston crown and inner side of cylinder head) with HHO blended fuel. In this study hydroxy gas was produced by electrolysis using potassium hydroxide (KOH) catalyst. Electrolysis is performed in a leak proof chamber. Utilizing an on board generation of the gas reduces the risk of storage. The effect of doping hydroxy gas to gasoline fuel on the performance characteristics of a spark ignition engine is studied Brake thermal efficiency, indicated thermal efficiency, mechanical efficiency and specific fuel consumption are all calculated for different load conditions. At mid and higher engine speeds the HHO system with petrol fuel yields higher engine efficiency compared to pure petrol fuelled engine operation. High burning velocity and low ignition energy of hydro-oxy air mixture leads to increased performance of the engine. Copper-coated engine showed improved performance when compared to con ventional engine with both different test fuels.