Geely plug-in hybrid achieves fuel consumption record

Geely Auto has made headlines by completing a remarkable long-distance efficiency run with its STARRAY EM-i plug-in hybrid SUV, setting a new Guinness World Records title for lowest fuel consumption on the Sydney–Melbourne Coastal Drive. This achievement, accomplished in December, was conducted under real traffic and environmental conditions, rather than in a controlled test environment.

For readers of eeNews Europe, this announcement serves as a valuable case study showcasing how plug-in hybrid architectures are being fine-tuned to bridge the gap between laboratory figures and actual fuel consumption in real-world scenarios. This development has significant implications for powertrain electronics, control strategies, and overall system integration.

Real-world test highlights PHEV efficiency

The record-breaking attempt encompassed a carefully selected route that closely resembled typical long-distance driving between major cities, incorporating elements such as highway cruising, urban congestion, and elevation changes. Geely has confirmed a verified fuel consumption figure of 3.83 L/100 km under these varied conditions, a result that led to the Guinness World Records recognition for a production plug-in hybrid SUV.

Geely designed the test to address concerns surrounding the phenomenon of “performance discounting” in plug-in hybrids, where fuel consumption tends to increase significantly once the battery is depleted. The STARRAY EM-i utilizes Geely’s EM-i Super Hybrid Technology, which combines a dedicated hybrid engine with an integrated “11-in-1” electric drive system aimed at maintaining efficiency even at low battery state of charge.

Powertrain architecture and system implications

From an engineering standpoint, this record achievement underscores the continuous efforts to optimize hybrid control software, thermal management, and power electronics to better balance electric and combustion operation. Geely highlights the thermal efficiency of its hybrid engine and the tighter integration between inverter, motor, and transmission functions as key factors contributing to this groundbreaking result.

While Geely emphasizes the significance of this accomplishment in delivering tangible savings for end users, the broader implications for European engineers lie in how such advanced architectures could shape the design of future PHEV platforms, especially as regulators intensify their scrutiny of real-world emissions and consumption data.

Market rollout and production plans

The STARRAY EM-i, also known as the Geely EX5 EM-i in certain regions, is currently available for purchase in markets like Poland and Italy. Geely has revealed that the model has commenced local production in Indonesia, with further plans to begin production in Brazil starting next year.