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Journal of Mechanical Engineering Science and Technology (JMEST)

Abstract

The use of ethanol-blended fuel in a standard vehicle can reduce combustion quality, which has an impact on decreasing vehicle performance. At the above 20% blend level, it affects vehicle performance and requires adjustments to engine settings or the Electronic Control Unit (ECU) before use on conventional engines. This study investigates the effect of aftermarket ECU settings on the performance of a 150 cc motorcycle operating on a gasoline-ethanol blend. Four fuel variations were tested: Pertalite (P100), revvo 90 (R100), and 30% ethanol blends (PE30 and RE30). This study analyzes the effects of optimizing injection duration and ignition timing settings on aftermarket ECUs, specifically evaluating engine performance indicators such as power, torque, and thermal efficiency. Research data were collected by recording DynoTest performance results and measuring actual fuel-to-air ratio. The results show that ECU optimization improves performance across all fuel types. For pure gasoline, maximum results are achieved by increasing the injection duration by +10% and ignition timing by +1°. The maximum power reaches 14.9 HP from 13.8 HP, which represents a 7% increase, with maximum torque reaching 14.7 Nm, which increases by 6-7%, and thermal efficiency remains at 25%. In ethanol fuel blends, maximum results are achieved by increasing the injection duration by +15% and ignition timing by +2°. ECU optimization increases power to 14.7 HP, a 14% increase, with maximum torque rising by 14-15% and thermal efficiency increasing by 1-2%. Optimal performance is obtained at an air-fuel ratio of 12.4-12.6, which based on theory, can produce peak performance.

Publisher

State University of Malang (UM)

First Page

197

Last Page

214

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