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All Journal Sibatik Journal : Jurnal Ilmiah Bidang Sosial, Ekonomi, Budaya, Teknologi, Dan Pendidikan International Journal of Science and Environment
Marlia Sandi, Wulan
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Agriculture, Biological Sciences & Forestry Arts Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Mathematics Physics Social Sciences

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The Effect of Injector Performance on Exhaust Gas Temperature Diesel Generator Engine on Ship Fikri Supriatmana, Muhamad; Nasri; Marlia Sandi, Wulan; Retno Gunarti, Monika; Sianturi, Intan
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.444

Abstract

Injectors play a crucial role in optimal combustion of marine diesel generator engines, but their performance degradation often causes exhaust gas temperature fluctuations that reduce efficiency and operational reliability. This study aims to analyze the effect of injector performance on exhaust gas temperature on the SV. STELLA 28 vessel. Using a causal descriptive quantitative approach, the population is operational data of Auxiliary Engine 1 and 2 for 12 months, with a purposive sample of 70 observations. Instruments include injector maximum pressure (PMAX) measurements and exhaust gas temperature thermocouples, analyzed through the Kolmogorov-Smirnov normality test, simple linear regression, and SPSS. The results show a significant effect (Sig. 0.000) with R² 0.417 and the equation . The conclusion states that optimal injector performance stabilizes exhaust gas temperature, supporting condition-based maintenance.
PENGARUH TEKANAN INJEKSI BAHAN BAKAR TERHADAP TEMPERATUR GAS BUANG AUXILIARY ENGINE NO. 1 DI MT. KAKAP Nugraheni, Salsabila; Edy Kristiyono, Antonius; Yudha Yudianto, Prima; Retno Gunarti, Monika; Marlia Sandi, Wulan
SIBATIK JOURNAL: Jurnal Ilmiah Bidang Sosial, Ekonomi, Budaya, Teknologi, Dan Pendidikan Vol. 5 No. 4 (2026)
Publisher : Penerbit Lafadz Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/sibatik.v5i4.4473

Abstract

Auxiliary engines in marine diesel generators frequently experience exhaust gas temperature (EGT) deviations due to suboptimal fuel injection pressure, contributing to inefficient combustion and increased emissions amid IMO 2025 sulfur regulations. This study aims to analyze the effect of fuel injection pressure on EGT in Auxiliary Engine No. 1 (Yanmar 6NY16L) onboard MT. Kakap and identify causal factors. Employing a sequential exploratory mixed-methods design, the population comprised all six cylinders with purposive sampling on the problematic cylinder (deviation >40°C) and 50 data points from pre-post maintenance measurements in April 2025. Instruments included injection pressure testers, EGT pyrometers, logbooks, and semi-structured interviews, analyzed via thematic coding, paired t-test, and Pearson correlation. Results revealed significant pressure increase from 200 to 240 kgf/cm² post-maintenance, normalizing EGT to 260°C average (t=9.834, p=0.01) with strong positive correlation (r=0.952). In conclusion, routine injector maintenance at 1500-2000 running hours prevents EGT deviations and enhances operational efficiency.
Co-Authors Edy Kristiyono, Antonius Fikri Supriatmana, Muhamad Nasri Nugraheni, Salsabila Retno Gunarti, Monika Sianturi, Intan Yudha Yudianto, Prima