THE EFFECT OF INJECTING WATER TO THE AIR FUEL MIXTURE IN A SPARK IGNITION ENGINE

Abstract

It is known that the development and improvement of the Internal Combustion Engines are moving rapidly and continuously. The main concerns of the developers are to reduce the fuel consumption as well as to increase engine performance and efficiency. Many methods can be used to achieve these goals such as (Turbo charging, Exhaust Gas Recirculation EGR), But recently another method of injecting water into ICE is getting more attraction. Water injection can be done by many methods. It may be a spray inside the cylinder or at the intake manifold. In the present study, Water Injection System (WIS) at intake manifold will be designed and implemented for gasoline engine (SI). In the experiments, engine operating conditions will be measured with and without (WIS), and the results will be compared to investigate the effect of (WIS) on engine performance and emissions. Based on the experimental data the water injection increases the engine output power and reduces exhaust emissions: CO by 3-7% and NOx by 25%.