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All Journal Mesin Jurnal Bakti Masyarakat Indonesia
Iman Kartolaksono Reksowardojo
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Agriculture, Biological Sciences & Forestry Education Electrical & Electronics Engineering Mechanical Engineering Social Sciences Other

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KAJI EKSPERIMENTAL MOTOR BAKAR BENSIN 2 LANGKAH DENGAN SISTEM PENYEMPROTAN LANGSUNG BAHAN BAKAR MEKANIS PADA RUANG BAKAR Iman Kartolaksono Reksowardojo; Aan Setyawan; Budi Sudarwanto; Ibrahim Syaharuddin
Mesin Vol. 18 No. 1 (2003)
Publisher : Mesin

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Abstract

In this study, a mechanical fuel direct injection system is used in a two-stroke 70 cc gasoline engine. The injection system is using a high pressure pump (injection pump) and an injector (Nozzle) from a 5 hp diesel engine that mechanically is operated by a cam. The modifications on the two stroke gasoline engine are unthrottle intake system, additional hole in the cylinder head for the injector and a camshaft system. The camshaft is connected to the crankshaft. Theperformance of the engine is tested and the result is compared with the performance of the carburetor system engine in the same testing condition. The performance of the direct injectionsystem engine is better than the carburetor system engine in 1600-1750 rpm range. The power of the engine increases in about 143%, the specific fuel consumption decreases in about 35%, the thermal efficiency increases in about 59%, the air intake increases in about 244%, the scavenging efficiency increases in about 110% and the air-fuel ratio increases in about 116%. The improvement of the performance is caused by the increase of the air-fuel ratio also causing a lean combustion and an unthrottle intake process. But in other operation condition the mechanical fuel direct injection system cannot operate with good performance because the system cannot full fill the need of a complex system control.
INTEGRATING TECHNICAL AND COMMUNITY TRAINING FOR SOLAR ENERGY ADOPTION: A CASE STUDY OF BARENGKOK VILLAGE Sri Hastuty; Yudi Rahmawan; Khusnun Widiyati; Yose Fachmi Buys; Iman Kartolaksono Reksowardojo; Syuja Lagusma; Fayza Yulia
Jurnal Bakti Masyarakat Indonesia Vol. 9 No. 1 (2026): Jurnal Bakti Masyarakat Indonesia
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jbmi.v9i1.37050

Abstract

Access to clean and sustainable energy remains limited in rural Indonesia, constraining social and economic activities. To address this issue, a community-based program was conducted in Barengkok Village, Bogor Regency, focusing on the installation, socialization, and maintenance training of solar photovoltaic (PV) street lighting systems. The program aimed to promote renewable energy awareness and strengthen local capacity for sustainable energy management. A participatory approach was applied, integrating three activities: installation of solar PV lamps at strategic sites, education on clean energy and carbon footprint reduction, and hands-on maintenance training. Program evaluation involved pre- and post-tests, observations, and participant satisfaction surveys. Results showed a clear improvement in participants’ understanding and technical competence. Average scores for PV knowledge and carbon awareness increased from 68.48% to 75.00%, Furthermore, 96% of the participants expressed high satisfaction. This initiative demonstrates that community-based renewable energy education effectively enhances technical literacy, supports carbon reduction goals, and fosters long-term energy sustainability in rural areas.
Co-Authors Aan Setyawan budi sudarwanto Fayza Yulia Ibrahim Syaharuddin Khusnun Widiyati Sri Hastuty Syuja Lagusma Yose Fachmi Buys Yudi Rahmawan