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BMW X5 Hybrid: Vision EfficientDynamics - Solar roof and Aero-rims

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BMW X5 Hybrid: Vision EfficientDynamics
Unique low fuel consumption
Battery with high storage capacity
Power basis: BMW diesel engines
Solar roof and Aero-rims
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Solar roof: additional energy without fuel consumption.
Intelligent energy management even goes beyond vehicle operation in the concept car BMW Vision EfficientDynamics. The study has a solar roof with photovoltaic units which generate electricity even when the vehicle is at a standstill. This can either be stored or used immediately. The solar roof thus serves as an additional source of energy for the vehicle power system which is independent of the engine.
Powerful solar cells over a surface area of some 1.0 square metres generate a maximum output of one kilowatt hour for consumers both inside and outside the vehicle. This energy is especially available for pre-heating the gear oil. Inefficient warm-up phases can thus be significantly reduced. What is more, direct energy supply is available during standstill for such functions as ventilation, operating a cool box, audio equipment or mobile phone chargers as well as for charging the vehicle battery. This reduces the need to convert fuel into electrical energy. Although this function takes effect while the vehicle is stationary and no measurable fuel consumption benefit from it can be ascertained in the test cycle, there is an obvious added value relevant to the customer: increased comfort from energy which is produced in a CO2-neutral way.

Aero-rims: fascinating design, optimised aerodynamics.
The body height of the vehicle is reduced by means of specific chassis modifications as compared to the serial production model. For the further optimisation of aerodynamics, new 19-inch light alloy rims with reduced ventilation effects were specially developed for the concept study BMW Vision EfficientDynamics. The aerodynamically optimised shaping of its spokes reduces resistance at the wheel’s axis of rotation. The impact of this directionally bound rim design specifically geared towards aerodynamics and thus to the efficiency of the vehicle is considerable. When travelling at high speeds, a vehicle fitted with the aerodynamic rim has to produce one kilowatt of engine output less at a speed of 160 km/h than the equivalent vehicle with conventional wheels, for example. This effect is not included in the calculation of the standardised average fuel consumption either, but it is certainly noticeable when driving.

Clear accentuations in design: progress made visible in the detail.
BMW Vision EfficientDynamics is based conceptually in terms of design on the BMW X5. The appearance of the successful Sports Activity Vehicle is preserved. Certain details reflect functional modifications which serve to optimise the vehicle’s aerodynamics, for example. The fact that the concept study is largely identical to the serial production vehicle symbolises the aspiration of the concept car to demonstrate the potential of BMW EfficientDynamics technology within an existing vehicle segment. The concept study BMW Vision EfficientDynamics provides feedback on the kind of increase in efficiency which is feasible in an SAV model of the premium segment without having to impose limitations on the characteristic properties of this model in terms of driving experience, comfort and space.
Finished in exclusive Mineral White, the vehicle has roof rails in Aluminium Satin. The plastic protective trim at the lower edge of the body is in Titanium Silver – distinct from the serial production model. The ActiveHybrid components in the engine and luggage compartments are labelled with the relevant designations. The “EfficientDynamics – ActiveHybrid” lettering on the lower section of the doors also shows the Sports Activity Vehicle to be an especially economical and low-emission concept.


A perspective for the future: BMW Vision EfficientDynamics.
With the application of innovative hybrid technology in combination with a 4-cylinder diesel engine, the concept car BMW Vision EfficientDynamics is set firmly within the development strategy BMW EfficientDynamics. As in the past, new technologies in the future for the reduction of fuel consumption and exhaust emissions will be applied in a combination which is adapted specifically to the model in question to provide increased driving dynamics and fuel efficiency. The aim is to develop concepts for all model series which provide maximum driving pleasure with as little fuel consumption as possible. In the field of hybrid applications, too, BMW opts for solutions adapted specifically to particular concepts and models. The Mild Hybrid concept put forward in the concept car BMW Vision EfficientDynamics thus offers just as promising a perspective as the Full Hybrid concept of the BMW Concept X6 ActiveHybrid.
The great variety of innovations and their intelligent combination with efficiency-enhancing measures already applied in serial production vehicles is what distinguishes the character of the concept car BMW Vision EfficientDynamics. It demonstrates what might be feasible in the field of fuel consumption and CO2 reduction when the highest level of development expertise and innovative concepts are applied. Each individual innovation presented in this concept car can achieve a further increase in efficiency which is relevant to the customer. The sum total of these effects is illustrated by the concept car BMW Vision EfficientDynamics, at the same time demonstrating the limits of what is feasible in the vehicle segment of the BMW X5. It shows clearly that in a vehicle which is already highly optimised, a disproportionate degree of technological expense and effort would be required to achieve even an even greater increase in efficiency. This also shows just how significant an advance has already been achieved by means of BMW EfficientDynamics in reducing fuel consumption and exhaust emission levels.


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