Rolling = Coasting
Another innovation that was first introduced in the BMW Active Hybrid 5 is used for additional consistent increased efficiency. This occurs through targeted switching off of the combustion engine at standstill, in urban traffic and also at fast speeds (coasting). If the combustion engine is not required, it can also be switched off while the vehicle is being driven. For this, the vehicle must be in the ECOPRO mode and the driver must not press the accelerator pedal. Up to a speed of 160 km/h, the combustion engine is then switched off and a separating clutch separates it from the rest of the drive train.
The vehicle subsequently runs silently and without emissions on the roadway without the influence of engine drag-torque. In order to ensure unrestricted operation of all safety functions and convenience functions, a small amount of the kinetic energy is converted into electric energy by recuperation.