Experimental study of the effect of displacement volume on torque and engine power of the Mandalika Desantara vehicle

As the number of vehicles increases, so does fuel consumption. With the dwindling stock of fuel oil, it has become imperative for humans to find alternative ways to save fuel without compromising vehicle performance. One promising solution is the development of energyefficient vehicles with improved fuel efficiency, as demonstrated by the MandalikaDesantara Team. Their approach includes modifications such as reducing engine displacement volume by decreasing cylinder volume and increasing the compression ratio. This study aims to investigate the effects of varying displacement volumes (59.13 cc, 85.88 cc, and 97.19 cc) and engine speeds on performance parameters such as torque and effective power. The engine performance tests were conducted using a rope brake dynamometer and gasoline fuel, which has an octane rating of 90. The results indicate that a 59.13 cc displacement volume yields more efficient fuel consumption compared to the other displacement variations (85.88 cc and 97.19 cc). Additionally, the test results revealed the highest torque value of 6.06 Nm at an engine speed of 6000 rpm and the highest power output of 6.377 PS at an engine speed of 7000 rpm for a cylinder volume of 97.19 cc.