Analytical Study of Intake Air Temperature Effect on SI Engine Performance and Emissions

The study deals with ambient air temperature effect on engine performance which work by spark and exhaust temperature with different parameters which effect on performance. The experiments included testing performance parameters and emissions for single cylinder SI engine at different conditions. The intake air temperatures was recorded from 15 ℃ to 75 ℃ with increase 10 ℃ at different speed engine conditions at 1500, 2000, and 2500 rpm. The results show that the increase of intake air temperature will improve fuel consumption and thermal efficiency about 14–16% approximately, and show reducing in volumetric efficiency with increasing of intake air temperature by increasing of sinking air temperature led to increasing of exhaust temperature.