2020 Audi Q7 48V Mild Hybrid System
25The standard mild hybrid technology plays a major part in the efficiency of the engines. In customer operation, this technology can reduce consumption by up to 0.7 liters per 100 kilometers. Its central component, the belt alternator starter (BAS), powers a 48-volt main electrical system in which a compact lithium-ion battery stores the energy. During braking, the BAS can recover up to 8 kW of power and feed it back into the battery. If the driver takes their foot off the accelerator at speeds between 55 and 160 km/h (34.2 and 99.4 mph), the Audi Q7 recuperates energy, rolls in idle or coasts for up to 40 seconds with the engine switched off. The BAS restarts the engine the next time the accelerator is depressed, and does so faster and more gently than a conventional starter. The start‑stop range begins at 22 km/h (13.7 mph).
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