Performance and Emissions Characteristics of Diesel Engine by Semi Ellipsoidal Arc Grooves on Piston Crown

Abstract

Abstract: Direct injection diesel engines are very useful in heavy duty vehicles as well as light duty vehicles. Direct injection diesel engine emits significant amount of pollutants such as HC, CO, NOx and soot etc., which are harmful to the environment. These pollutants formed due to improper combustion in combustion chamber. In the present experimental attempt is made to study the performance and emission characteristics of diesel engine by adding the semi ellipsoidal arc grooves on piston crown. The tests are performed at two, three and five groves on piston crown of diesel engine [ 2EGP,3EGP and 5EGP]. The grooves on the piston crown creates turbulence and proper mixing of air and fuel in combustion chamber which helps to create proper combustion and leads to decrease the formation of pollutants as compared to normal diesel engine. From the experimental investigations, it is concluded that three ellipsoidal grooves arc pistons [3EGP] has less emissions and high performance than that of other type of pistons.