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About

Nobunori Okui is a leading researcher in the field of automotive engineering, specializing in real driving emissions (RDE) testing, fuel economy, and the integration of automated driving technologies. His work focuses on understanding how driving behavior—both human and automated—affects vehicle performance and environmental impact. Okui’s most-cited paper (2018, 9 citations) investigates how differences in driving behavior influence fuel economy and emission characteristics during vehicle simulator execution, providing critical insights for regulatory compliance. He has also advanced the development of driving robots and driver models for electrified vehicles, incorporating regenerative brake control to optimize efficiency (2024, 3 citations). Notably, his recent study on the test procedure for fuel economy and CO₂ emissions in vehicles with Adaptive Cruise Control (ACC) systems (2024, 2 citations) addresses the growing need for standardized testing as automated driving technology becomes more prevalent. Okui’s contributions are vital for shaping RDE test protocols in Japan and globally, supporting the transition to cleaner, more efficient transportation.