Author : S.Ravi Babu, K.Prasada Rao and P.Ramesh Babu

The present day energy crisis and ever increasing demands of energy in addition to global pollution brought us into a situation where there is an urgent need for energy conservation, efficient utilization and eco-friendly techniques to be implemented in day to day use. These needs lead us to an idea of modified design in a CI engine without any additional energy requirement and with no complicated variations in design. There are various other methods to improve the efficiency of engine such as super charging, turbo charging, varying stroke length, varying injection pressure, fuel to air ratio, additional strokes per cycle and so on. Many of them require additional design (stroke length, injection pressure etc.,) and some of them load to increase environmental effect. Here in this project affords were made to increase the velocity (physical parameter) of air entering the inlet manifold of the engine by inserting a convergent divergent nozzle at the inlet manifold. There by increasing the mixture quality of air & fuel in the combustion chamber before the initialization of ignition. The engine load tests were carried out at different loads, variation of different parameters with load was plotted. The nozzle setup was installed and then again load test were carried out at different loads and the values were plotted in comparison to former values. The emissions from the engine were also tested before and after the setup installation to estimate the environmental effects. The comparative results were also plotted.

Keywords: I.C Engine, diesel engine, Performance characteristics, Emission control.

Article published in International Journal of Current  Engineering  and Technology, Vol.3,No.4(Oct- 2013)