Effect of Compression ratio, Injection Timing and Injection Pressure on a DI Diesel engine for better performance and emission fueled with diesel diesel biodiesel blends

In the present investigation test were carried out to examine the performance, combustion analysis and emissions of a direct injection diesel engine coupled with electrical dynamometer fueled with diesel and pungam methyl ester and their blends (PME10, PME20 and PME30).From the investigation it is found that the combined increase of compression ratio, injection timing and injection pressure increases the BTHE and reduces BSFC while having lower emissions for PME20. For small sized direct injection constant speed engines used for agricultural applications (4.4 kW), the optimum combination was found as CR of 19:1 with IP of 240 bar and injection timing 27°bTDC.The heat release rate are reduced Methyl ester of Pungam oil blended fuel PME20 compared to diesel. The harmful pollutants such as HC, CO, are reduced in the pungam oil esters compared to diesel fuel.