Effect of Ethanol Addition in the Combustion Process During Warm-UPS and Half Open Throttle on Port-Injection Gasoline Engine

Problem statement: Ethanol is an alternative fuel with huge potential that can be used in gasoline engines. Addition of ethanol in fuel will affect the fuel properties, fuel properties change will affect the engine performance. Approach: To determine the effect of adding ethanol to gasoline engines, in this study are tested using gasoline, ethanol 10 and 20% ethanol. Results: Testing is done at the time of warm-ups and half-open throttle. From the experiment will know adding ethanol in the process of warming-up and half-open throttle was a decline emission, at half open throttle will increase CO₂ emissions and reduce HC and CO, during warm-ups that while the increased CO but decreases CO₂. Conclusion/Recommendations: Although experiments on the throttle partially open, the test under 3000 rpm using 10 and 20% ethanol will reduce power, but at 3500 rpm to increase engine power.