Power Losses Minimization for Optimal Operating Maps in Power-Split HEVs: A Case Study on the Chevrolet Volt

The power-split architecture is the most promising hybrid electric powertrain. However, a real advantage in energy saving while maintaining high performance can be achieved only by implementation of proper management strategy. This requires an optimized functional design before and comprehensive analysis powertrain losses after, which could rather challenging owing to constructive complexity transmission, especially for multi-mode with multiple planetary gearing. difficulty was overcome dimensionless model, already available literature, that enables any even full operation. paper relies on this approach find operating points internal combustion engine both machines minimize total power losses. optimization carried out given vehicle speed demanded torque, supposing different scenarios respect battery capability providing or gathering power. efficiency thermal considered, as well transmission mechanical aim provide global map exploited extract data suitable real-time control As case study, procedure applied system Chevrolet Volt.