Comparison of Combustion Characteristics of CI Engine-Fueled with Simarouba and Pongamia Biodiesels

The present work is carried out on Simarouba and Pongamia biodiesels for the best performance as an alternative fuels used in Internal Combustion (IC) engine. The biodiesels were prepared by transesterification route as per standard. The combustion characteristics evaluated by considering the parameters like ignition delay, peak pressure development, heat generation rate for biodiesel 20% blend with commercial diesel on single cylinder water cooled diesel engine with constant speed of 1500 rpm. The analysis of P-θ diagrams gave the combustion delay, magnitude of premixed, mixed controlled and late combustion phases. The investigation of combustion of biodiesels revealed that ignition delay is almost same to the pure diesel and the peak pressureattains after TDC are also comparably same as diesel. The B20 of Simarouba and Pongamia biodiesels are emerged as better alternative fuel for an existing CI engine in comparison with other blends