|BMW X5 Hybrid: Vision EfficientDynamics|
|Unique low fuel consumption|
|Battery with high storage capacity|
|Power basis: BMW diesel engines|
|Solar roof and Aero-rims|
Page 1 of 5BMW X5 Hybrid: Vision EfficientDynamics
Source: BMW Group
Experience driving pleasure and reduce fuel consumption and exhaust emission levels – BMW EfficientDynamics makes both possible at the same time. BMW’s unique development strategy has now been taken one stage further: with the concept study BMW Vision EfficientDynamics, the German premium automobile manufacturer presents a vehicle in which a diesel engine and BMW ActiveHybrid Technology combine to provide increased driving dynamics with a total output of 165kW and an acceleration rate of 0 to 100 km/h in 8.9 seconds, as well as fuel consumption reduced to just 6.5 litres per 100 kilometres in the EU test cycle and a CO2 emission level of 172 grams per kilometre. The combination of current BMW diesel engine expertise and pioneering hybrid technology reflects the unique potential of the development strategy BMW EfficientDynamics. With model-specific innovations, BMW achieves the best possible relation between sheer driving pleasure and economy in all vehicle segments.
The concept study BMW Vision EfficientDynamics is based on the Sports Activity Vehicle BMW X5 which already occupies a leading position in its segment in terms of both driving dynamics and efficiency. This is due to the use of technologies selected for this specific model which were developed as part of the BMW EfficientDynamics program. The concept car BMW Vision EfficientDynamics adheres to this consistent strategy with further innovations which are harmoniously integrated with one another. This applies particularly to the combination of a 4-cylinder diesel engine with a Mild Hybrid concept, ensuring a new dimension of efficiency in this vehicle segment.
What is more, the generator supports the combustion engine with an output of 15kW and a maximum torque of 210Nm: this is the basis for being able to realise the drive characteristics typical of the BMW X5 with a 4-cylinder diesel engine.
For the purposes of efficiency optimisation, Mild Hybrid and the 4-cylinder diesel engine complement each other just as well as in the BMW Concept X6 ActiveHybrid with its combination of a Full Hybrid concept and an 8-cylinder petrol engine. With these differing approaches, BMW demonstrates the large breadth of potential hybrid applications. This also shows that in the field of hybrid technology, solutions tailored to specific models and concepts help achieve maximum efficiency in all output categories and vehicle segments.
BMW Vision EfficientDynamics has at its disposal a large number of measures for promoting efficiency which already form part of the standard fittings of new BMW models, as well as others which are potential options for future use. Each individual innovation presented in the concept car BMW Vision EfficientDynamics is capable of achieving a further increase in efficiency which is relevant to the customer – to a degree of technological expense and effort which is realistic for serial production vehicles. This is also in keeping with the character of technologies developed as part of the BMW EfficientDynamics program both in the past and in the future. They are successively being integrated in more and more model series, each one in a specific configuration to suit the model in question. In this way, the impact of these innovations in enhancing efficiency is able to grow steadily and become increasingly widespread.
With the overall package of innovations used in the concept car BMW Vision EfficientDynamics, the already outstanding efficiency of the standard BMW X5 is taken to the limits of what is feasible in this segment, regardless of today’s customer acceptance of a large vehicle with asmall engine and its costs. The study combines the supremacy, comfort and extensive space provision of a large SAV with levels of fuel consumption and exhaust emissions which would otherwise only be familiar among conventional vehicles of the compact class. This shows that with this highly advanced degree of optimisation, any reduction of fuel consumption and exhaust emission levels going beyond this would require a disproportionate increase in technological effort and expense. For reasons of cost, such an imbalance would work against the realization of such measures in serial production vehicles.
Innovative combination: BMW diesel engine and BMW ActiveHybrid.
The combustion engine of this study – a 2.0 litre 4-cylinder diesel with Variable Twin Turbo, common rail direct injection of the third generation and all-aluminium gearbox housing – was developed as part of BMW EfficientDynamics. The state-of-the-art engine delivers 150kW/204bhp. With a maximum torque of 400Nm from 2,000 rpm, it provides pulling power at the level of a 6-cylinder diesel with a much larger capacity. In spite of this, the new 2.0 litre engine has one of the lowest levels of fuel consumption in the world for a diesel engine.
Its unsurpassed efficiency is also due to the BMW EfficientDynamics measures in the environment of the engine, including Brake Energy Regeneration, needs-oriented control of ancillary units and the Auto Start/Stop Function. This intelligent energy management is supplemented in the concept car BMW Vision EfficientDynamics by BMW ActiveHybrid Technology, resulting in a further increase of both dynamic performance and efficiency.
A generator integrated in the gear casing with an output of 15 kW and a maximum torque of 210 Nm supports the combustion engine in producing a dynamic drive torque, also combining with a lithium-ion battery at the rear of the vehicle to efficiently supply power for numerous electrical consumers. The Mild Hybrid concept means that the vehicle has a direct increase in dynamic performance during acceleration: its total output is 165kW.
What is more, the generator is able to produce electrical power with a high degree of efficiency and without direct conversion of primary energy due to Brake Energy Regeneration. With its high performance and storage capacity, the lithium-ion battery allows ancillary units to be operated on electrical power at a level which goes far beyond what is currently possible in serial production vehicles. The possibilities of this concept extend to powering the air conditioning compression, the electric coolant pump and an electrical steering system. For these extended functions, a 120 volt vehicle power system was designed which operates parallel to the conventional 12 volt network in the BMW Vision EfficientDynamics study. The intensified production and use of electrical energy takes the strain off the combustion engine so that the latter can operate even more economically and at the same time generate an even higher level of driving dynamics.
BMW Vision EfficientDynamics also shows what other advances will be possible in future in connection with BMW EfficientDynamics. The concept study has a solar roof with photovoltaic units which generate electrical energy while the vehicle is at a standstill. This energy can either be stored or used immediately. In particular, this energy produced in a CO2-neutral manner is available to pre-heat the gear oil. Inefficient warm-up phases are thus significantly shortened. In addition, it is possible to operate ventilation, air conditioning and entertainment systems permanently even when the vehicle is stationary, without having to draw on the reserves of the vehicle batteries. In order to optimise aerodynamics, the concept car BMW Vision EfficientDynamics not only has active air intake flaps which are also available in serial production vehicles and a chassis with lowered suspension, it is also fitted with completely newly developed wheels. The design of the light alloy rims is designed to achieve an intensive reduction of aerodynamic drag.