Experimental and numerical study on the characteristics of gasoline engine powered by gasoline blended with water ammonia solution

This study investigates the effect of mixing gasoline with water ammonia solution (WAS) on the thermal characteristics of a gasoline engine. The engine was run on gasoline-WAS blends under variable load and speed. The experiments were conducted, including pure gasoline and gasoline blended with WAS in four different volumetric ratios (5%, 10%, 15%, and 20%). The results showed that the brake thermal efficiency (BTE) increased by 1.96%, 3.8%, 4.75%, and 5.8% for 5%, 10%, 15%, and 20% of WAS respectively compared to gasoline. However, brake-specific fuel consumption (BSFC) increased by 2.85%, 9.72%, 11.86%, and 17.21% respectively compared to gasoline. Lower exhaust gas temperature is reported for WAS blends concerning gasoline. Numerical analysis was performed using the Diesel-RK simulation software version 4.189. The main findings revealed that the peak pressure, NOx and CO emissions decreased significantly as a result of adding WAS to gasoline. The heat release rate decreased due to the reduction in heating content for all WAS blends.