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All Journal International Journal of Industrial Innovation and Mechanical Engineering KREATIF: Jurnal Pengabdian Masyarakat Nusantara
Damianus Manesi
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Astronomy Computer Science & IT Economics, Econometrics & Finance Education Engineering Health Professions Law, Crime, Criminology & Criminal Justice

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Impact of Engine Downsizing on Fuel Economy and Carbon Footprint : A Simplified Modeling Approach Priyono Priyono; Damianus Manesi; Edy Suprapto; Fahrizal Fahrizal; Wofrid E. Bianome
International Journal of Industrial Innovation and Mechanical Engineering Vol. 2 No. 2 (2025): May : International Journal of Industrial Innovation and Mechanical Engineering
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ijiime.v2i2.269

Abstract

Global climate change demands immediate technological advancements, particularly in the transport industry that continues to use fossil fuels. One viable solution is to reduce the size of vehicle engines to make them more fuel-efficient and lower carbon emissions. The purpose of this research is to assess the effect of reducing engine size on fuel consumption and CO₂ emissions in low-cost green car hatchbacks in Indonesia. The technique employed is straightforward analytical modeling, employing Pearson correlation analysis and linear regression among three significant variables: engine capacity, fuel economy, and CO₂ emission. The data are obtained from the technical specifications of four hatchback automobile models, all of which have an engine capacity of less than 1,200 cc. Findings indicate that smaller engine capacity is accompanied by greater fuel economy and lower carbon emissions. The lowest engine size of 998 cc is used in the Toyota Agya, which demonstrates the most efficient fuel and lowest emissions. The statistical analysis shows that there is an inverse relationship between engine size and fuel efficiency, but a positive relationship between engine size and CO₂ emissions. The limitation of sample size causes reduced statistical power of the model. In conclusion, engine downsizing can prove to be a productive approach in promoting green schemes, but additional research with a larger data set and other determinants must be undertaken to establish a more advanced and precise model.
Optimalisasi Produksi dan Pemasaran Keripik Singkong melalui Teknologi Tepat Guna di Kelompok Sahabat Tani Damianus Manesi; Fahrizal Fahrizal; Rohi, Jullyo G.; Putra, Tri Mandala; Klau, Aleksander O.; Maia, Jenigius A. R; Nuban, Albi; Sei, Alexander Y.; Tuka, Oliver
KREATIF: Jurnal Pengabdian Masyarakat Nusantara Vol. 6 No. 1 (2026): Jurnal Pengabdian Masyarakat Nusantara
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/kreatif.v6i1.11058

Abstract

This community service program was implemented to enhance the production and marketing of cassava chips by the Sahabat Tani Group in Lamea Village, Wewiku District, Malaka Regency. The main challenges faced by the partners were the use of manual slicers that produced uneven thickness, low capacity, and a risk of injury, as well as simple packaging methods that were not airtight, reducing product shelf life. To address these issues, the program introduced appropriate technologies, namely a semi-mechanical slicing machine and an electric sealer, supported by training in machine operation, packaging techniques, product labeling, and business management focused on production recording and digital marketing. The implementation method included observation, interviews, solution design, structured training, field mentoring, and participatory evaluation. The results showed an increase in production capacity from an average of 3-4 kg/day to 8-10 kg/day, improved product quality with uniform slices, extended shelf life and attractiveness through labeled packaging, and the initiation of production recording and social media based marketing. Participatory evaluation revealed that the program not only improved technical aspects but also enhanced the partners’ confidence, participation, and independence in sustainably developing their business.
Co-Authors Edy Suprapto Fahrizal Fahrizal Fahrizal Fahrizal Helmi Muhammad Klau, Aleksander O. Maia, Jenigius A. R Nuban, Albi Priyono Priyono Putra, Tri Mandala Rohi, Jullyo G. Sei, Alexander Y. Tuka, Oliver Wofrid E. Bianome