Studi Eksperimen Pengaruh Variasi Input Tegangan Koil Pengapian Terhadap Unjuk Kerja dan Emisi Gas Buang Engine 4 Langkah 1 Silinder SOHC 113cc FI Berbahan Bakar Etanol

Muslihudin, M. Diki (2019) Studi Eksperimen Pengaruh Variasi Input Tegangan Koil Pengapian Terhadap Unjuk Kerja dan Emisi Gas Buang Engine 4 Langkah 1 Silinder SOHC 113cc FI Berbahan Bakar Etanol. Diploma thesis, Institut Teknologi Sepuluh Nopember Surabaya.

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Abstract

Etanol merupakan salah satu bahan bakar alternatif sebagai pengganti bahan bakar fosil. Etanol memiliki properti yang berbeda dengan bensin yang biasa digunakan pada kendaraan bermotor, sehingga mesin yang semula menggunakan bahan bakar bensin harus dimodifikasi agar dapat menggunakan bahan bakar etanol. Dengan demikian, perlu adanya perubahan pada engine dengan cara memodifikasi sistem pemasukan bahan bakar dan sistem pengapian. Dalam tugas akhir ini, penelitian berfokus pada modifikasi sistem pengapian. Penelitian dilakukan dengan menggunakan engine 4 langkah 1 silinder SOHC 113 cc FI dengan cara memperoleh laju aliran massa injeksi bahan bakar yang tepat. Pengujian dilakukan menggunakan dyno test dengan putaran engine 2500, 3500, 4500, 5500, 6500, 7500, dan 8500 rpm. Modifikasi dilakukan pada variasi input tegangan koil pengapian, yaitu standar (12 V), 20 V, 30 V, 40 V, dan 50 V. Hasil pengujian menunjukkan bahwa rata-rata nilai unjuk kerja yang paling baik terdapat pada variasi tegangan 40 V dengan rata-rata daya sebesar 5,88 HP dan rata-rata laju aliran massa bahan bakar paling kecil, yaitu 1,48 kg/h, dengan efisiensi paling tinggi sebesar 47,29%, sedangkan efisiensi tertinggi untuk tegangan standar (12 V) sebesar 45,01%, tegangan 20 V sebesar 45,35%, tegangan 30 V sebesar 46,02%, dan tegangan 50 V sebesar 45,20%. Demikian pula, pada analisis emisi gas buang secara keseluruhan telah lolos uji emisi gas buang berdasarkan Peraturan Menteri Lingkungan Hidup, dimana batas kandungan CO < 4,5% dan kandungan HC < 2000 ppm. Emisi gas buang yang paling baik terdapat pada variasi tegangan 50 V, yaitu dengan kandungan CO sebesar 3,93% dan kandungan HC sebesar 322 ppm.
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Ethanol is an alternative fuel as a substitute for fossil fuels. Ethanol has different properties from gasoline commonly used in motorized vehicles, so engines that originally used gasoline must be modified to use ethanol fuel. Therefore, changes to the engine are required by modifying the fuel intake system and ignition system. In this final project, the research focuses on modifying the ignition system. The study was conducted using a 4-stroke, 1-cylinder SOHC 113 cc FI engine by obtaining the appropriate fuel injection mass flow rate. The tests were carried out using a dyno test at engine speeds of 2500, 3500, 4500, 5500, 6500, 7500, and 8500 rpm. The modification was performed using variations in the input voltage of the ignition coil: standard (12 V), 20 V, 30 V, 40 V, and 50 V. The test results showed that the best average performance was obtained at a voltage variation of 40 V, with an average power of 5.88 HP and the smallest average fuel mass flow rate of 1.48 kg/h, with the highest efficiency of 47.29%. Meanwhile, the highest efficiency for the standard voltage (12 V) was 45.01%, 20 V was 45.35%, 30 V was 46.02%, and 50 V was 45.20%. Similarly, the overall exhaust emission analysis passed the exhaust emission test based on the regulation of the Minister of Environment, where the CO content limit is <4.5% and the HC content limit is <2000 ppm. The best exhaust emissions were obtained at a voltage variation of 50 V, with a CO content of 3.93% and an HC content of 322 ppm.

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	Etanol, input tegangan koil pengapian, unjuk kerja dan emisi gas buang.
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ785 Internal combustion engines. Spark ignition
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Muslihudin M. Diki
Date Deposited:	12 Aug 2026 07:50
Last Modified:	12 Aug 2026 07:50
URI:	http://repository.its.ac.id/id/eprint/70312

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