In the past, fuel systems were relatively simple structures which stored gasoline or diesel. However, in recent years they have become highly complex. Increasingly stringent emission legislation and the introduction of new fuels and additives as well as powertrain hybridisation have all had a major impact on the development of a modern tank. Bertrandt develops and verifies new concepts for refuelling and ventilation, including the examination of noise behaviour and more complex development processes. Article published by ATZ (05/2017).