THE EFFECT OF A MIXTURE OF PERTALITE FUEL AND WHITE GLUTINOUS RICE BIOETHANOL (ORYZA SATIVA GLUTINOSA) ON ENGINE PERFORMANCE OF YAMAHA NMAX 155 CC 2019 MOTORCYCLE

        Kebutuhan akan bahan bakar minyak saat ini semakin meningkat seiring dengan semakin bertambahnya kendaraan transportasi. Hal itu membuat ketersediaan bahan bakar minyak semakin menipis. Bioetanol merupakan salah satu energi alternatif yang dinilai layak untuk digunakan sebagai campuran bahan bakar minyak. Tujuan dari penelitian ini adalah untuk menganalisis pengaruh penggunaan bioetanol dari beras ketan putih terhadap kinerja mesin (torsi, daya, tekanan efektif rata-rata, efisiensi termal, dan konsumsi bahan bakar) sepeda motor Yamaha Nmax 155 CC tahun 2019.

        Jenis penelitian ini adalah eksperimen. Objek Penelitian ini adalah sepeda motor Yamaha Nmax 155 cc 2019 dengan perbandingan kompresi 10,5:1. Alat dan instrumen uji kinerja mesin yaitu blower, chasis dynamometer, fuel flow meter, stopwatch, dan  tachometer digital. Sedangkan bahan bakar yang digunakan yaitu pertalite (E0) dan biopertalite (E10, E20, E30, E40, E50, E60). Pengujian dilakukan mulai putaran mesin 3000-9000 rpm dengan interval 1000 rpm. Metode pengujian menggunakan full open throttle valve berpedoman pada SAE J1349 (Engine Power Test Code—Spark Ignition and Compression Ignition—Net Power Rating) dan pengujian laju konsumsi bahan bakar berpedoman pada SNI 7554:2010. Untuk pengujian karakteristik bahan bakar berpedoman pada ASTM (densitas D1298, viskositas ASTM D445, titik nyala ASTM D39, nilai kalor bahan bakar ASTM D240, dan nilai oktan D2699).
          Hasil penelitian ini diharapkan dapat mengetahui karakteristik bahan bakar pertalite dan campuran pertalite dengan bioetanol beras ketan putih serta dapat meningkatkan kinerja mesin (torsi, daya, tekanan efektif rata-rata, dan efisiensi termal, dan dapat mengurangi konsumsi bahan bakar).

The need for fuel oil is currently increasing along with the increasing number of transportation vehicles. This makes the availability of fuel oil increasingly scarce. Bioethanol is an alternative energy that is considered suitable for use as a fuel oil mixture. The aim of this research is to analyze the effect of using bioethanol from white glutinous rice on engine performance (torque, power, average effective pressure, thermal efficiency and fuel consumption) of the Yamaha Nmax 155 cc 2019 motorcycle.

This type of research is experimental. The object of this research is a Yamaha Nmax 155 cc 2019 motorcycle with a compression ratio of 10.5:1. Engine performance test tools and instruments are blower, chassis dynamometer, fuel flow meter, stopwatch and digital tachometer. Meanwhile, the fuel used is pertalite (E0) and biopertalite (E10, E20, E30, E40, E50, E60). Testing was carried out starting from 3000-9000 rpm engine speed with 1000 rpm intervals. The test method uses a full open throttle valve guided by SAE J1349. For testing fuel characteristics, it is guided by (ASTM D1298 density, ASTM D445 viscosity, and ASTM D39 flash point) and the heating value is guided by IKA/LEL-ITS/BK.

The results of characteristic testing (density, viscosity and flash point) of fuel (E0, E10, E20, E30, E40, E50, E60) increase as the bioethanol concentration increases, but the heating value of the fuel decreases as the bioethanol concentration increases. Meanwhile, the results of engine performance testing using fuel (E0, E10, E20, E30, E40, E50, E60) show that E50 has the greatest influence. This is proven by a torque of 12.05 Nm at an engine speed of 6000 rpm, an effective power of 12.1 HP at an engine speed of 8000 rpm, an average effective pressure of 11.06 kgf/cm2 at an engine speed of 5000 rpm, fuel consumption rate combustion of 0.52 liters/hour at engine speed of 3000 rpm, and thermal efficiency of 30.78% at 5000 rpm.