Sutiman Sutiman, Gargazi Gargazi, Bambang Sulistyo, Nur Arifin, Julian Fathi
This study aims to find the effect of changes in the compression ratio on performance and fuel consumption on the Yamaha Vega Force Fi engine with ethanol fuel (E100) and find the most optimal compression ratio for the Yamaha Vega Force engine with ethanol fuel (E100). The type of research is experimental research with three variations of compression ratio as the research object in the Yamaha Vega Force Fi engine. The test was carried out with a dynojet 250i chassis dynamometer and burette to measure torque, power, and fuel consumption. The data analysis technique used to process data from the test result used descriptive analysis. The result of this study indicates that a compression ratio of 13,5:1 produces the most optimal performance and is the most efficient fuel consumption for the Yamaha Vega Force Fi engine with ethanol (E100) fuel. Increasing the compression ratio from 12:1 to 13,5:1 has an impact on increasing the torque achievement by 14%, increasing achievement engine power by 9%, and improving the brake-specific fuel consumption (BSFC) by up to 11%. © 2024 Author(s).
Faculty of Engineering, Universitas Negeri Yogyakarta, Yogyakarta, Indonesia; Information Technology Education Department, Universitas Mandalika Mataram, Mataram, Indonesia
