EVALUATION OF EMISSION AND EFFICIENCY OF SINGLE CYLINDER FOUR –STROKE DIESEL ENGINE USING EXHAUST GAS RECIRCULATION PROCESS

In recent days, internal combustion (IC) engines are playing an important role in the field of automobiles due to their advantages. Still, the fuel consumption and thermal efficiency are the factors defining the performance of the engine. In an IC engine, homogeneous charge refers to the complete mixture of fuel (petrol or diesel) and air entering the chamber. In an ideal world, this would imply complete dispersion of the atomized fuel by air. This work utilizes the four-stroke diesel engine for the experimental purpose to evaluate the efficiency of the engine and also the emission level. The efficiency of the engine is enhanced by using exhaust gas recirculation (EGR) process. The improvement of engine efficiency is performed by minimizing the throttling losses, reducing the heat rejection, and decreasing the molecular separation with the help of EGR process. The experimental setup includes a heat exchanger at the engine's manifold, and when the heat exchanger's fresh charge and outlet pipes come into contact, heat transfer can occur. The experimental results proved that the EGR process is enhancing the brake thermal efficiency and reduced the fuel consumption ratio. Moreover, the mechanical efficiency of the engine also increases and reduces the emission of carbon monoxide (CO) from the engine.