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All Journal Jurnal Pendidikan Teknik Mesin Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran JITEK (Jurnal Ilmiah Teknosains) Automotive Science and Education Journal Surya Abdimas Journal of Baja Health Science Nuras : Jurnal Pengabdian Kepada Masyarakat Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan Shibyan: Jurnal Pendidikan Guru Madrasah Ibtidaiyah Jurnal Inovasi Mesin Journal of Mechanical Engineering Learning
Ahmad Roziqin, Ahmad
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Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Engineering Environmental Science Health Professions Immunology & microbiology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Veterinary Other

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Journal : Journal of Mechanical Engineering Learning

 1 
The effect of cutting speed on the roughness level of low carbon steel cutting results using the trulaser 3030 machine Amron, Husni; Roziqin, Ahmad
JMEL : Journal of Mechanical Engineering Learning Vol. 13 No. 1 (2024): June
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jmel.v13.i1.5503

Abstract

This research aims to determine the effect of variations in cutting speed on the roughness value of low carbon steel cutting results using CNC Laser Cutting TruLaser3030. This research uses experimental methods and descriptive statistical data analysis techniques and diagrams to present data on the measurement results of research specimens using cutting speeds of 2520 mm/minute, 2205 mm/minute, and 1890 mm/minute. Roughness testing was carried out using Surface Roughness Mitutoyo SJ-210. The results of the research produced data showing that the higher the cutting speed, the roughness value increases and the lower the cutting speed, the roughness value will decrease. And if the cutting speed is too high then the material cannot be cut. The lowest roughness value, namely 8.46µm, was at a cutting speed variation of 1980 mm/minute. The highest roughness value, namely 23.63µm, occurs at a cutting speed variation of 2520 mm/minute.
Effect of using a high performance-low pollution muffler (hplpm) with catalytic converter on fuel consumtion and performance of 110cc Susanto, Nugroho Fajar; Roziqin, Ahmad; Naryanto, Rizqi Fitri; Mujaki, Ahmad
JMEL : Journal of Mechanical Engineering Learning Vol. 13 No. 1 (2024): June
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jmel.v13.i1.7934

Abstract

The increse in the number of motorcycles to fulfil mobility is domianted by matic type. Over time the vehicle will experience a derease in performance and appearance, triggering modification. the purpose of this study was to determine the difference in motorcycle performance with the use of standard exhaust, HPLPM 2 + catalytic converter and HPLPM mod + catalytic converter. This reaserch was conducted with a quantitative research meode with an experiemental approach, performance testing test data at engine speed of 3000-9000 rpm. Engine temperature 80 degree with pertamax fuel ocatane 92. In this study, HPLPM mod + catalytic converter produces 12,23 N.m of torque at 4500 rpm, the highest power produced by HPLPM 2 + catalytic converter 8,27 Hp at 5500 rpm. exhaust HPLPM mod + catalytic converter is able to maintain power at high rpm 7,70 Hp at 8250 rpm.
Analysis of diesel engine vehicle emissions using egr with temperature variations Hakim, Fa’iq Taufiqul; Wijaya, M. Burhan Rubai; Abdurrahman; Roziqin, Ahmad
JMEL : Journal of Mechanical Engineering Learning Vol. 14 No. 1 (2025): June (In Progress)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jmel.v14.i1.23830

Abstract

This study aims to analyze the exhaust emissions of diesel engine vehicles with and without the use of the Exhaust Gas Recirculation (EGR) system at engine temperature variations of 60℃, 70℃, and 80℃. The study was conducted on a 2008 Mitsubishi L300 Diesel vehicle to measure the effect of EGR on NOx emissions and soot emissions (smoke opacity). The research method used was an experiment with a quantitative approach. Data were obtained by measuring exhaust gas temperature as an indication of NOx emissions and using a smoke opacity meter to measure the level of vehicle smoke concentration. The results showed that the use of EGR was able to reduce NOx emissions, but increased soot emissions. The higher the engine temperature, the NOx emissions tended to increase both in vehicles with and without EGR. Conversely, soot emissions decreased along with increasing engine temperature. The conclusion of this study is that the EGR system is effective in reducing NOx emissions but has side effects in the form of increased soot emissions. Therefore, optimization of EGR technology needs to be combined with other strategies to reduce the negative impact on air quality.
Co-Authors Abdurahman Abdurrahman Amron, Husni Angga Septiyanto Arimaz Hangga, Arimaz Ayub Budhi Anggoro, Ayub Budhi Bayu Bagas Hapsoro, Bayu Bagas Dony Hidayat Al-Janan Fayisa, Fadhil Fitriyanto, Piyan Hadromi - Hakim, Fa’iq Taufiqul Herminarto Sofyan Imanu Danar Herunandi Jatsiah, Anisa Nur Karsan, Karsan Khoirudin Fathoni, Khoirudin Kriswanto Kriswanto, Kriswanto Linardita Ferial, Linardita M. Burhan Rubai Wijaya muhammad riyadi, muhammad riyadi Mujaki, Ahmad Nia Kurniatillah Purnama, Hendrik Putra, Ni’mal Maula Ramelan Ramelan Rizqi Fitri Naryanto Rohman, Shohihatur Saputro, Wahyu Adi Septiyanto, Angga Sonika Maulana Sudirja, Andri Marta Susanto, Nugroho Fajar Suwahyo - Wahyu Wibowo Wijayanto, Bagus Wiranto, Akhmad