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Achmad Aminudin
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.
Co-Authors , Yoga Ahdiat Fakhrudi Agus Choirul Arifin Agus Susanto Alfi Salim Alfi Tranggono Agus Salim Alfi Tranggono Agus Salim Andriyani, Reza Putri Apip Amrullah Arifin, Agus Choirul Arifin Arrosida, Hanum Asnan, Muhammad Fathoni Azizah Qory Budiarti, Yuli Ceryana Nia Rahmawati Cynthia Cahya Aditama Deni Nur Fauzi Dhanurseto Hadiprashada Diah Febriana Diaz Pratama Elza Febri Yusdetira F, Yoga Ahdiat Farid majedi Farid Majedi Farid Majedi, Farid Farozi Agus, Nour Fernando, Yuri Himawansyah, Bertarius Imam Basuki Indah Puspitasari Indarto Indarto Indarto Yuwono Jatmiko Yogopriyatno Juwari Kholis Nur Faizin Kholis Nur Faizin, Kholis Nur Kurniawan, Ahmad Misfa Kurniawan, Avip M. Haikal Akbar Maritha, Vevi Masayu Nazar Surya Kencana Mochamad Reza Arimurti Muhamad Fajar Subkhan Muhamad Rizki Fachrudin Fachrudin Muhammad Rifqi Agung Priandwika Muhyiddin Aziz Nana Ainiya Khalidah Nana Ainiya Khalidah NANANG ROMANDONI Nasrul Ilminnafik Nesaputro, Muhammad Wahyue Ni Jade Salsabila Noorsakti Wahyudi Noorsakti Wahyudi Nur Ihda Farikhatin Nisa Pamungkas, Doni Setyo Prasongko, Agung Putra, Roby Mahendra R. Akbar Nur Apriyanto Raden Mohamad Herdian Bhakti Radiffa Aditama Rahayu Mekar Bisono Rakhmad Gusta Putra Rizal Mahmud Roby Mahendra Putra Salsabila Pramudya Eka Putri Saputra, Ade Marta Shinta Fajar Sari Sri Novita Sari, Sri Novita Sudarni, Dyan Hatining Ayu Sulfan Bagus Setyawan suratman Umi Kulsum Viby Yuan Kurnia Wahyu Pribadi Wahyu Pribadi Wardana, Kelvin Dwi Wida Yuliar Rezika Yoga Ahdiat F Yoga Ahdiat Fakhrudi Yoga Ahdiat Fakhrudi Yoga Akhdiat Fahrudi Yogopriyatno, Jatmiko Yuli Prasetyo