Due to the quick increase in automobile usage, there is currently an ecological imbalance brought on by air pollution that is getting worse by the hour. Car exhaust gas emissions must be reduced, and better fuel combustion is a necessity. Despite the short amount of time needed for combustion, no fuel is burned, and all of the fuel returns as exhaust. In order to prevent this, the burning of diesel engines results in a sufficient mass of air in the air-fuel mixture (lean mixture), which leads to cheap fuel intake and greater volumetric efficiency. A supercharger, more specifically a turbocharger, increases the diesel engine's volumetric efficiency. However, installing a turbocharger in a vehicle engine demands extra room, size, and maintenance. As a result, a Turbonator is added to the diesel engine's air intake manifold, creating swirl in the cylinder-air flow. The enhancement of IC engine efficiency has been conceded by the reduction of fuel consumption and emission levels. Many researchers worked in the alternate fuel system, design modification in the intake manifold, piston, engine cylinder, turbocharger system, etc. The turbocharger system helps to reduce the emission level of diesel engines in current trends. In this research, emission reduction and engine performance are improving by introducing turbonator fitted into the intake manifold. The design of turbonator is designed by Blade Element Theory (BET), which generates a swirl in the flow of air into the cylinder. The number of blades in turbonator has varied as 4, 8, & 12 respectively for a better outcome. The experimental load test is carried out in the KIRLOSKAR TV-I engine for 10 cc of fuel consumption to prove the turbonator performance. The turbonator with 4 blades gives a better performance than it suitable to implement into the diesel engine intake

Keywords: Diesel engine, Turbonator, Engine efficiency, Emission parameters, Performance test, Emission test