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NANANG ROMANDONI
Mesin Otomotif, Jurusan Teknik, Politeknik Negeri Madiun
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Optimizing injection pressure for diesel engines fueled with waste cooking oil biodiesel blends Aminudin, Achmad; Pamungkas, Doni Setyo; Basuki, Imam; Romandoni, Nanang; Nisa, Nur Ihda Farikhatin; Wardana, Kelvin Dwi
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.7819

Abstract

This study examines the effects of used cooking oil biodiesel and injection pressure on diesel engine performance and emissions. Highlights the combined effects of injection pressure and biodiesel blends. The fuel mixtures used were Pertamina Dex (B0), B50 (50% biodiesel), and B65 (65% biodiesel), with injection pressures of 160, 170, and 180 bar. Tests were conducted on a Dongfeng S195 diesel engine with a load of 1000–5000 watts. The parameters tested included fuel characteristics (density, viscosity, flash point, and calorific value), Brake Specific Fuel Consumption (BSFC), Brake Thermal Efficiency (BTE), and exhaust gas opacity. The results show that injection pressure plays a critical role in optimizing biodiesel combustion. The B65 blend at an injection pressure of 170 bar produced the lowest BSFC of 279.30 g/kWh and a high BTE of 25.54%, approaching that of pure diesel. In terms of emissions, the lowest opacity value of 5.88% was achieved with the B65 blend at 180 bar. These findings demonstrate that an optimal injection pressure, particularly 170 bar, can significantly improve fuel efficiency and combustion performance of high-percentage biodiesel blends while reducing exhaust smoke. Thus, used cooking oil biodiesel can improve fuel safety and efficiency as well as reduce emissions, provided it is combined with optimal injection pressure.
Basic Engine Training Of Gasoline Injection System Pada Guru Produktif SMK Keahlian Teknik Kendaraan Ringan Farid Majedi; Achmad Aminudin; Muhammad Taali; Nanang Romandoni
AMMA : Jurnal Pengabdian Masyarakat Vol. 1 No. 10 (2022): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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Abstract

The development of technology in the automotive sector, especially four-wheeled vehicles is increasing. This is shown by the use of Electronic Fuel Injection (EFI) technology for the fuel intake system. Therefore, teachers must continue to upgrade their skills and expertise in order to improve the quality of graduates. SMK Teknik Bakti Persada is a school that has one of the light vehicle engineering expertise programs. Judging from the tools and machines that are in the workshop, the average is a machine with EFI technology. There needs to be an effort to improve teacher competence related to the gasoline injection system. Gasoline injection system training is a community service program that aims to improve the competence of productive teachers at SMK Teknik Bakti Persada. The training method applied is theory and practice which is carried out for 4 days. The results showed that the trainees were able to disassemble the starter motor, alternator, tune up the EFI engine, and use a scanner to stream engine data. Improving the skills of vocational school teachers is expected to have an impact on the quality of graduates who are quickly absorbed in the industrial world.
Co-Authors Abdul Aziz Abdul Aziz Achmad Aminudin Achmad Aminudin Achmad Arif Alfin Ade Ilham Gunaputra Adiesceasha Akbar Alfi Tranggono Agus Salim Alfi Tranggono Agus Salim Andi Alfian Putra Fajar Arifin, Salman Alfarisi Bi Asngali Cecillia Yowien Arthamevia Ceryana Nia Rahmawati Cynthia Cahya Aditama Deni Nur Fauzi Diah Febriana Diashinta Putri Aprilla Elza Febri Yusdetira Eric Rico Ardiansyah Fadillah, Firdho Putra Fakhrudi, yoga ahdiat Farid Majedi Farid Majedi Farid majedi Farid Majedi, Farid Fuad Hasan Fuad Hasan Gunaputra, Ade Ilham Guntur Ardanibudiman Putra Hilman Naufal Rafi Ilmi Rizki Imaduddin Imaduddin, Ilmi Rizki Imam Basuki Indah Puspitasari Indah Puspitasari INDAH PUSPITASARI Indah Puspitasari Indarto Yuwomo Indarto Yuwono Indarto Yuwono Jovial Auliya Furqan Khairul Anam Basyar Kholis Nur Faizin Kholis Nur Faizin Kholis Nur Faizin, Kholis Nur Mochamad Reza Arimurti Moh. Farhan Baihaqi Muhamad Fajar Subkhan Muhamad Rizki Fachrudin Fachrudin Muhammad Debi Priantoro Muhammad Rusthon Habibi Muhammad Taali Noorsakti Wahyudi Noorsakti Wahyudi Novi Indah Riani Nur Ihda Farikhatin Nisa Nur Laila Ramadhani Octaviana Gunawati Pamungkas, Doni Setyo Prayogo Arie Bowo Putri Aprilia Sari Radiffa Aditama Rahayu Mekar Bisono Rakhmad Gusta Putra Ratna Muninggar Rohmadoni Fitriantika Salim, Alfi Tranggono Agus Salman Alfarisi Arifin Satrio Sri Gunawan Shinta Fajar Sari Siti Khumaidah Sri Wahyuni Syifaul Azam Viby Yuan Kurnia Wahyu Pribadi Wardana, Kelvin Dwi Wida Yuliar Rezika Wida Yuliar Rezika