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All Journal Infotekmesin AMMA : Jurnal Pengabdian Masyarakat
Lukman Sanjaya, Firman
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Humanities Chemistry Computer Science & IT Electrical & Electronics Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing

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Peningkatan Kompetensi Alat Ukur Siswa Teknik Kendaraan Ringan Kelas XII SMK Ki Hajar Dewantara Brebes Setijo Budi, Sigit; Syarifudin; Fatkhurrozak, Faqih; Lukman Sanjaya, Firman; Budhi Hendrawan, Andre
AMMA : Jurnal Pengabdian Masyarakat Vol. 3 No. 10 : November (2024): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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Abstract

The basic competencies of SMK graduates are demanded to be adaptive according to the needs of the business world and the industrial world. Basic competence is the basis for the depth of graduate competence. Community service aims to improve the basic competence of technical measurement tools for Class XII Students of the Light Vehicle Engineering Department, Ki Hajar Dewantara Vocational School, Brebes Regency. The method used was a workshop that was held on June 5 and 6 2024. The tool used to measure the success of the community service program was the implementation of evaluation at the pre-workshop and post-workshop stages. The results of the activity explained that the pre test was carried out to find out the initial condition of the participants' competence by 15%. Meanwhile, the final competency of the participants, which was carried out through post-workshop evaluation, increased by 66.67%. The provision of Refreshing material and PjBL practicum measuring tools is the key to the success of the workshop.
Pengaruh Penambahan Methanol Terhadap Performa Mesin Injeksi 150 CC Berbahan Bakar Pertamax fatkhurrozak, faqih; Lukman Sanjaya, Firman; Syarifudin, Syarifudin; Nur Akhmadi, Amin; Budhi Hendrawan, Andre
Infotekmesin Vol 16 No 1 (2025): Infotekmesin: Januari 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i1.2395

Abstract

The use of fossil fuels causes air pollution in Indonesia. Biofuel is one of the alternatives often used, one of which is methanol. Methanol has efficient characteristics and low emissions, increases engine performance and thermal efficiency, and reduces fuel consumption. This study aims to observe the concentration of pertamax - methanol addition of 5%, 10%, and 15% on performance, BSFC, and BTE. The percentage of pertamax and methanol fuel mixing is 5%, 10%, and 15%, and the speed used is 1000, 2000, and 3000 rpm. The measurements taken are power, BSFC, and BTE using a dynotest and displayed on a screen. Adding 5%, 10%, and 15% methanol to pertamax increases engine performance. The addition of Pertamax-methanol PM15 increases power by 25% at a speed of 1000 rpm, reduces BSFC by 40% on PM15 at a speed of 2000 rpm, and increases thermal efficiency on PM5 by 73% at a speed of 2000 rpm
Korelasi Nilai Oktan dan Kandungan Oksigen Biofuel Mangrove dengan Brake Torque dan Emisi NOx Mesin Bensin 150cc Syarifudin; Khumaidi Usman, Muhamad; Fatkhurrozak, Faqih; Lukman Sanjaya, Firman
Infotekmesin Vol 16 No 1 (2025): Infotekmesin: Januari 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i1.2565

Abstract

Alternative fuels are a priority to reduce the problem of fuel stock shortages. Bioethanol has potential because of its octane number specifications, oxygen content, and simple production techniques. Mangrove bioethanol is produced from mangrove fruit, which is non-edible and abundant. This study aims to observe the correlation of Mangrove Biofuel specifications (mixture of gasoline and 5% Mangrove Bioethanol) to Brake Torque and NOx Emissions produced by gasoline engines. Experimental methods are applied, from Mangrove Bioethanol production, octane value, oxygen content testing, and Mangrove Biofuel production to performance and emission testing. The results of the study showed that the correlation of the 101 octane number specifications and 30.31% oxygen content of Mangrove Biofuel increased the highest Brake Torque, reaching 5.45%, and increased the highest NOx emissions up to 6.54% at engine speeds of 5000 rpm.
Co-Authors Budhi Hendrawan, Andre Fatkhurrozak, Faqih Khumaidi Usman, Muhamad Nur Akhmadi, Amin Setijo Budi, Sigit Syarifudin Syarifudin Syarifudin