M.Sc. Tezi Görüntüleme | |||||||||||||||||||||
|
|
||||||||||||||||||||
| Summary: Experiments have been performed at throttle settings of 1:4, 2:4, 3:4, 4:4 (at the 1/4, 2/4, 3/4, 4/4 gas positions) different engine speeds and various water ratios. The water has been injected to intake air at the approximate ratios of 5%, 6.25%, 7.5%, 8.75%, 11.25%. A separate simple carburetor of which main nozzle section is variable has been designed and connected to intake pipe before the original carburetor for addition of water at desired ratios into intake air. Thus, the water injection at various ratios into intake air has been achieved without any considerable modification on engine structure. Experiments have been performed by using a constant compression ratio, single cylinder Honda GX 160 gasoline engine. The torque, brake effective power, mean brake effective pressure, brake specific fuel consumption, brake effective efficiency and ratios of CO and HC emissions obtained from experiments have been investigated at various operating conditions. It was determined from the investigation and discussion of the experimental results that the water injection at specified ratios into intake air improves somewhat the engine performance and exhaust emissions. The best results for all operating conditions have been obtained at water ratio of about 6.25%. For this case, an increment of about 7% in brake effective power and decrement of about 6% in brake specific fuel consumption have been achieved. Emissions of CO and HC have also been reduced of about 30% and 25%, respectively. Key Words: Alternative Fuels, Engine Performance, Water-Gasoline Blends, Water Injection into Intake Air. | |||||||||||||||||||||