The figures show that, with the increase in brake power 
the indicated thermal efficiency for each fuel has 
increased. Also, with the increase of biodiesel 
percentage in blended fuel, the indicated thermal 
efficiency gradually decreases. It is due to the lower 
calorific value of biodiesel. Form the figures, it is 
clearly seen that, with EGR condition, indicated thermal 
efficiency increases because of the increase in intake 
charge temperature and combustion velocity which is 
caused by EGR itself.