Intelligent energy management is key to the BMW iPerformance concept. The system coordinates the interaction of all of the drive components to produce the best possible efficiency with great driving dynamics. Intelligent energy management optimises the hybrid drive's power-efficiency by predictively choosing the appropriate drive. For example, navigation data is used to identify in advance the sections of the route and driving situations that are best suited for the electric motor or for charging the battery.
When the combustion engine is being inefficient, the system makes it produce additional power. This is used to create electricity for the battery, which can later be used for electric driving or supporting the combustion engine. The system also controls the electric motor/generator, so that kinetic energy is transformed into electrical energy during coasting and when braking. In combination with ECO PRO mode, intelligent energy management adapts all vehicle systems, such as air conditioning, to be fuel-consumption conscious and highly efficient.
The eDrive button allows the driver to choose between three different electric drive modes. When starting the vehicle, the AUTO eDrive (hybrid) mode is active by default. The MAX eDrive mode allows a purely electric driving up to 87mph, where permitted. In the Battery Control mode, the saved electric energy is retained for later use.