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OPTIMALISASI PENYETELAN CELAH KATUP TERHADAP TEKANAN KOMPRESI PADA KENDARAAN ISUZU PHANTER Suhendro Oktosatrio; Sugihandoko; Taufan TjandraKusuma
JURNAL MEKANIKASISTA Vol. 13 No. 1 (2025): NOVEMBER 2025
Publisher : PPM Sdirjianbang Akademi Militer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63824/jtmp.v13i1.393

Abstract

This study aims to determine the effect of valve clearance adjustment on compression pressure and fuel consumption in the Isuzu Panther Bravo vehicle. The background of this research is based on the frequent inaccuracies in valve clearance adjustments caused by the improper use of measuring tools, such as using paper instead of a proper fuller gauge. Incorrect valve clearance settings can lead to various engine problems. When the valve clearance is too tight, the compression pressure becomes low, the engine overheats easily, fuel consumption increases, engine power decreases, and the engine becomes difficult to start. Conversely, if the valve clearance is too wide, the compression pressure also decreases, engine power is reduced, and a knocking or “ticking” sound appears when the engine is running. The research was conducted using nine different valve clearance settings, both for the intake and exhaust valves, ranging from 0.20 mm to 0.60 mm. Each variation was tested using a compression pressure gauge to measure the resulting pressure for each setting. The test results showed varying but relatively close values, so an average was calculated to determine the most ideal valve clearance. The findings of this study are expected to provide practical guidance in setting the correct valve clearance to achieve optimal compression pressure and maximum fuel efficiency in the Isuzu Panther Bravo engine. Moreover, it emphasizes the importance of using the proper measuring instrument, such as a fuller gauge, to ensure accuracy in valve clearance adjustments. Keywords: valve clearance, compression pressure, engine efficiency, Isuzu Panther , optimization
PENGARUH PEMAKAIAN KOMPOSISI KOH METANOL DAN MINYAK CURAH DALAM PEMBUATAN BIODIESEL Budi Harijanto; Sukahar; Suhendro Oktosatrio
JURNAL MEKANIKASISTA Vol. 13 No. 2 (2026): MEI 2026
Publisher : PPM Sdirjianbang Akademi Militer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63824/jtmp.v13i2.518

Abstract

Penelitian ini bertujuan untuk menganalisa kebutuhan daya listrik pada reaktor transesterifikasi menggunakan gelombang mikro dalam proses produksi biodiesel. Analisa dilakukan untuk mengetahui besar konsumsi daya listrik yang digunakan oleh setiap komponen reaktor, meliputi pompa, microwave, dan mikrokontroler selama proses transesterifikasi berlangsung. Metode penelitian dilakukan melalui pengukuran tegangan dan arus listrik pada setiap komponen, kemudian dihitung menggunakan persamaan daya listrik untuk memperoleh nilai konsumsi energi dan biaya listrik yang dibutuhkan. Hasil penelitian menunjukkan bahwa total kebutuhan daya listrik pada reaktor transesterifikasi sebesar 1478,63 Watt dengan total konsumsi energi sebesar 0,180 kWh untuk satu kali proses produksi. Biaya konsumsi listrik yang dibutuhkan sebesar Rp159,27, sedangkan total biaya produksi mencapai Rp3.709,27. Dari proses tersebut dihasilkan biodiesel sebanyak 680 ml dan gliserin sebanyak 100 ml dengan nilai hasil produksi sebesar Rp23.060. Berdasarkan hasil analisa, penggunaan reaktor transesterifikasi menggunakan gelombang mikro dinilai mampu menghasilkan proses produksi biodiesel yang efisien dengan kebutuhan daya listrik yang relatif rendah serta memberikan keuntungan secara ekonomis.Kata kunci: Daya listrik, reaktor transesterifikasi, gelombang mikro, biodiesel, konsumsi energi.