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All Journal MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering
M. Yasep Setiawan
Department of Automotive Engineering, Universitas Negeri Padang
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Industrial & Manufacturing Engineering

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Vehicle-Based Evaluation of 12-V SLI Battery Cranking Performance under Ambient Cold-Start and Hot-Start Conditions Ichsan Nasution; M. Sadly Firmansyah; M. Yasep Setiawan; Yuli mafendro dedet eka saputra; Budi Utomo Wisesa; Ilham Febriansyah
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 8 No 1 (2026): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46574/motivection.v8i1.544

Abstract

Reliable engine starting in conventional vehicles depends on the SLI battery’s ability to deliver high cranking current while maintaining voltage under load. This study evaluated a 12-V maintenance-free lead-acid SLI battery rated at 450 A CCA under practical ambient cold-start (20–30 °C) and hot-start (85–105 °C) conditions. Testing was conducted over four consecutive days using measured CCA, CCA ratio, minimum cranking voltage, open-circuit voltage (OCV), and starter duration. The tested battery showed generally better cranking indicators under the hot-start condition, with higher measured CCA, higher CCA ratio, slightly higher minimum cranking voltage, and shorter average starter duration. OCV remained stable at approximately 12.5–12.6 V, indicating that the observed cranking differences were not mainly associated with major no-load voltage variation. The combined use of CCA, cranking voltage, OCV, and starter duration provides a practical diagnostic basis for evaluating SLI battery starting readiness.
Comparative Exhaust-Gas Characteristics of Sugarcane Bagasse and Pineapple Waste Bioethanol Blends in a Fuel-Injected Motorcycle under a Common HHO-System Configuration Calvin M. P. Sinaga; Wawan Purwanto; M. Yasep Setiawan; Ahmad Arif
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 8 No 2 (2026): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46574/motivection.v8i2.608

Abstract

Agricultural waste-derived bioethanol offers a renewable gasoline-blending option for spark-ignition engines. This study compared sugarcane bagasse- and pineapple waste-derived bioethanol blends in a fuel-injected Honda BeAT motorcycle operated under a common HHO-system configuration. Five fuel formulations—E0, E5-SC, E10-SC, E5-PW, and E10-PW—were tested at 1500, 4000, and 7000 rpm. CO, HC, CO₂, and O₂ were measured using a four-gas analyzer, while λ and AFR were reported by the analyzer. Results are presented as means from three replicate runs. E10-SC recorded the lowest mean CO concentration at 4000 rpm and the lowest mean HC concentration at 7000 rpm, whereas E10-PW recorded the lowest mean CO concentration at 7000 rpm. The formulation rankings varied with engine speed and measured parameter. Because HHO was not tested independently, its specific contribution could not be determined.
Co-Authors Ahmad Arif Budi Utomo Wisesa Calvin M. P. Sinaga Ichsan Nasution Ilham Febriansyah M. Sadly Firmansyah Wawan Purwanto Yuli mafendro dedet eka saputra