Combustion analysis of cylinder pressure, NHRR, MGT and CHRR of twin cylinder CRDI engine

In the present experimental study Jatropha curcas biodiesel blends produced through Trans-esterification process is used along with application of different cooled exhaust gas recirculation (EGR) rates in a twin cylinder four stroke CRDI engine. Combustion properties like cylinder pressure, NHRR, MGT and CHRR of an engine at constant speed were measured and analysed. From the analysis it is found that JB20 fuel blend has peak combustion pressure, temperature and NHRR due to better combustion. Maximum cylinder pressure and MGT increased with increase of FIP, this is due to improved fuel–air mixing at high fuel injection pressure. With respect to application of EGR rate, the NHRR is lesser because of higher EGR rates may lead to formation of low temperature flames and also the increased concentration of CO2 and H2O in the mixture will lead to slower reaction