Introduction (PDF, 6,8 MB) - BMW Group

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0.22 44 How do you design vehicles that are radically different? Johannes Liebl, head of Efficient Dynamics Our development departments are home to a great many experts who are undoubtedly among the best in their particular field of specialisation. But the most amazing ideas occur when you put them together in a room with other specialists: with the best and brightest from totally different disciplines; people who question why things have to be done a particular way and whether it wouldn’t be possible to do them completely differently. The BMW Vision EfficientDynamics concept car was born from many such questions. It is precisely this approach of developing, discussing and building things differently that we are currently applying to future generations of our series models. It is still too early to say exactly what they will look like. But we are on the verge of solving some extremely interesting questions. But one thing is certain: We will once again be bringing improved dynamic performance, combined with increased efficiency, to the road. Air resistance By comparison, conventional sports cars only achieve a maximum of 0.29 C x Holger Winkelmann, head of Aerodynamics A top speed of 250 km / h provided by a 120 kW engine – that was the goal right from the start of development of the BMW Vision EfficientDynamics concept. Ambitious parameters like these represent a huge challenge for designers and aerodynamics experts alike: Such a sporty but efficient vehicle demands an extremely aerodynamic design. For this, it is necessary to precisely determine how the vehicle’s components can be used to the best aerodynamic effect. This means imagining new concepts with complex fluid mechanical processes that even experienced aerodynamicists have trouble grasping. However, these complex relationships are currently being explored at the BMW Group’s new Munich-based Aerodynamics Testing Centre. Inside the 170-millioneuro facility – the most advanced of its kind in the world – we are able to simulate wind speeds of up to 300 kilometres per hour, as well as cornering and even passing manoeuvres. This is where the Air Curtain was created: Air hangs like an invisible curtain over the front wheels, optimising the airflow around the wheel arch. This aerodynamic trick can be seen in the BMW Vision EfficientDynamics – and will soon be a standard feature in many of our vehicles. Can air be used to overcome air resistance?
3 45 Topic three Efficient Dynamics 3 As BMW “energy minister”, Johannes Liebl coordinates Efficient Dynamics research. 4 Holger Winkelmann (left) knows how to build with air. 5 Test bench at the new Aerodynamics Testing Centre 6 Flow optimisation for the Vision EfficientDynamics 5 6 4
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Page 58 and 59: 58 “ We are more efficient today;
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Page 64 and 65: 64 “ Great driving experience in
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