Hybrid engines.

Double the gains: the intelligent combination of a combustion engine and electric motors aims to save fuel and reduce emissions, while simultaneously improving dynamic performance and driving comfort.

Hybrid comes from the Latin and describes something of mixed origin or comprising different elements. With reference to vehicles, it denotes one that uses two different drive systems - generally a combination of a combustion engine and an electric motor. In a mild hybrid, the electric motor only assists the internal combustion engine. In a full hybrid, an internal combustion engine is combined with a relatively large electric motor. This motor is powerful enough to drive the car on its own, at low speeds.
For BMW, the term hybrid represents something more than simply integrating an electric motor. It represents the intelligent management of energy flows within the vehicle. Modern hybrid drives aim to save fuel and reduce emissions, while simultaneously improving dynamic performance. Based on a modular hybrid drive system, optimally chosen hybrid components are integrated into each vehicle so that they can be used as and when they are needed. BMW ActiveHybrid represents all future BMW hybrid technologies and plays a major role in BMW EfficientDynamics.