Monitoring of motor generator and inverter operations using OBD diagnostics device in hybrid vehicle

Zulkefli, Nur Anissa Nadira (2025) Monitoring of motor generator and inverter operations using OBD diagnostics device in hybrid vehicle. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Hybrid Electric Vehicle (HEV) are pivotal in addressing environmental challenges, emphasizing reduced emissions and fuel efficiency. Despite their advancements, optimizing HEV performance through real-time monitoring remains unexplored. This study investigates the operations of motor generator and inverters in Toyota Prius 3 using the Launch X431 Pro Scan Tool, focusing on key parameters such as RPM, torque, inverter temperature and engine coolant temperature across Eco and Sport modes. The research identifies critical gaps in understanding HEV dynamics and aims to enhance performance monitoring capabilities. The methodology includes real-time data collection during controlled test runs, analysing the variations in engine parameters under different speeds and driving modes. Results indicate that Eco mode prioritizes energy efficiency with smoother transitions, whereas Sport mode emphasizes performance with aggressive power delivery and higher thermal loads. These findings highlight the importance of advanced diagnostic tools improving HEV efficiency and sustainability. The study concludes that optimizing HEV operations through detailed parameter analysis can significantly contribute to environmentally friendly automotive advancements.

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