• S.Padma Priya
• Dr.K.Kalyani Radha

Due to the increase of automobiles from past decade, emissions are also increasing. In order to reduce emissions and to increase the engine performance some of the techniques used are modification of piston crown, designing the combustion chamber. In the present work meshed bluff bodies are used which is one of the technique to improve the performance of the engine. The purpose of meshed bluff body in the piston crown is, at the end of compression stroke when the piston approaches the TDC, the fuel injector injects a metered quantity of fuel in a finely atomised form into the mesh, this fuel molecules will absorb the heat and carried away by the mesh in the first cycle. In the second cycle the fresh air fuel mixture is injected on the mesh the stored heat which helps to pre-heat the air fuel mixture. Due to this meshed bluff body the delay period is reduced. Due to this complete combustion takes place inside the cylinder and increases the engine performance. In this experiment conventional piston, brass crown and meshed bluff bodies with diesel and blends of pine oil are used on the test engine. Out of all these pistons tested, one of them (meshed bluff body) is found to be best in terms of efficiency.

Direct injection diesel engines, meshed bluff bodies, performance, pine oil

"Experimental investigations on the performance of CI engine using diesel and biodiesel blends of pine oil with meshed bluff bodies", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 12, page no.137-141, December-2017, Available :http://www.jetir.org/papers/JETIR1712028.pdf

"Experimental investigations on the performance of CI engine using diesel and biodiesel blends of pine oil with meshed bluff bodies", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 12, page no. pp137-141, December-2017, Available at : http://www.jetir.org/papers/JETIR1712028.pdf