Intelligent energy management is one of the main pillars of the BMW iPerformance concept. This system coordinates the interaction of all drive components in order to combine the best possible efficiency with great driving dynamics. Intelligent energy management optimises the hybrid drive's power-efficiency factor by predictively choosing the appropriate drive. For example, available 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 high-voltage battery.
In situations in which the combustion engine would have a low power-efficiency factor, the system shifts up to a higher load range with a better power-efficiency factor. That means that the combustion engine produces additional power. This power is used to create electricity for the battery via the electric motor/generator, which can later be used for electric driving or efficiently supporting the combustion engine. It 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, including all auxiliary components and comfort functions, 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 purely electric driving of up to 140 km/h. In the Battery Control mode, the saved electric energy is retained for later use.