Evaluation of Performance and Emissions of Ceramic Coated Turbocharged Direct Injection Diesel Engine operated with Diesel and Biodiesel Blends

Abstract

It is evident that the main derivatives of biodiesel obtained from the transesterification of vegetable oils are identified as a best suitable alternate fuel for conventional diesel fuel. However higher viscosity and poor volatility of biodiesel causes engine problems for long-term use in diesel engines. Preheating of biodiesel is one of the technique reducing the problems associated with the higher viscosity of biodiesel in diesel engines. The positive effect of increased operating temperature of ceramic-coated engine concept is incorporated to avoid the preheating and maximize the effective heat release of biodiesel. The combination of increased operating temperature associated with LHR engine and oxygenated nature of biodiesel ensure nearly complete combustion. The experiment was conducted on a four cylinder four stroke direct injection turbocharged diesel engine and the combustion chamber was coated with partially stabilized zirconia (PSZ) of 0.35 mm thickness over 0.15 mm thickness of NiCrAl bond coat. The performance and emissions of conventional turbocharged engine and ceramic coated turbocharged engine were analyzed using diesel and biodiesel blends.