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The German automaker BMW has officially unveiled the new ActiveHybrid 7, the first car in the world to combine a V8 gasoline engine, eight-speed automatic transmission and an electric motor as a mild hybrid concept. The V8 engine delivers 449 HP between 5,500 and 6,000 rpm and a peak torque of 479 lb-ft consistently all the way from 2,000 to 4,500 rpm. The ActiveHybrid 7 accelerates from 0 to 60 MPH in just 4.9 seconds, and can hit a top speed of 155 MPH. The V8 engine is combined to a three-phase synchronous electric motor positioned between the combustion engine and the automatic transmission converter. The electric motor generates additional drive power of 20 HP, with maximum power increasing to an even more substantial 27 HP in the generator mode charging the lithium-ion battery. In the driving mode BMW ActiveHybrid 7 benefits from maximum output of 465 HP and peak torque of 516 lb-ft. Other green technologies included in the new ActiveHybrid 7: Brake Energy Regeneration, two interconnected on-board power networks, and a 400 watt-hour 35 cell lithium-ion battery which weighs 59.5 lb and measures 14.6 x 8.7 x 9.1 inches. Full details in the press release after the jump. Press release BMW is proud to present the most supreme and luxurious rendition of hybrid technology ever seen so far in the automobile: BMW ActiveHybrid 7. Based on the BMW 7 Series, this unique car sets new standards for effi ciency in the luxury class. BMW ActiveHybrid 7 is the fi rst car in the world to combine a V8 gasoline engine, eight-speed automatic transmission and an electric motor as a mild hybrid concept. This symbiosis of an upgraded eight-cylinder with BMW TwinPower Turbo Technology and High Precision Injection with a three-phase synchronous electric motor gives BMW ActiveHybrid 7 overall system output of 342 kW/465 hp and maximum torque of 700 Newton-metres/516 lb-ft. Power is transmitted via an eight-speed automatic transmission, with the electric motor positioned in compact confi guration between the combustion engine and the converter on the automatic transmission receiving its supply of energy from a lithium-ion battery developed especially for use in the automobile. Hybrid technology also provides new options for the particularly efficient use and enjoyment of additional comfort functions. As an example, BMW ActiveHybrid 7 is the fi rst BMW with automatic transmission to feature an Auto Start Stop function avoiding idle speed operation of the engine when at a standstill or in traffi c jams. A further signifi cant advantage is that the air conditioning and ventilation system remains fully operational also with the engine switched off, power being supplied directly through the 120-volt on-board network operating on the lithium-ion battery. Like the existing models within the BMW 7 Series, BMW’s fi rst luxury saloon with hybrid drive is entering the market in two body variants. The extended version of BMW ActiveHybrid 7 comes with wheelbase increased by 14 centimetres or 5.5", benefi ting exclusively the rear-seat passengers. And to optimise the driving experience and grand touring comfort for individual requirements, both models are available with a wide range of options from the portfolio of equipment and accessories offered on the BMW 7 Series. BMW ActiveHybrid as a major element of the BMW Effi cientDynamics development strategy.Right from the start, the regular production models in the new BMW 7 Series come with a broad scope of BMW Effi cientDynamics technologies quite unparalleled worldwide in their diversity and effects. Now BMW ActiveHybrid technology offers yet another option, hybrid technology for the fi rst time achieving the unique standard already defi ned by BMW in the luxury performance segment. BMW ActiveHybrid 7 takes a truly innovative approach in ensuring outstanding effi ciency in the luxury class. At the same time this unique saloon offers dynamic driving characteristics at a level by far exceeding everything hybrid cars have been able to offer so far. Appropriate use of the electric motor also in the interest of driving comfort likewise ensures yet another signifi cant step into the future provided by the development of hybrid components focusing on both the requirements of the luxury class and the characteristics so typical of a genuine BMW. The result is an extremely effi cient luxury performance saloon at the same time offering unprecedented Sheer Driving Pleasure for a hybrid car. BMW uses hybrid technology wherever it can make a particularly effective contribution to the reduction of fuel consumption and emissions. As a rule, the savings potential of hybrid technology increases with the power of the combustion engine interacting with the system. Precisely this is why BMW ActiveHybrid technology in conjunction with a V8 power unit achieves a signifi cantly greater effect than when combined, say, with a six- or fourcylinder engine. Intelligent energy management optimising the generation, storage and use of electric powerThe drivetrain technology in BMW ActiveHybrid 7 ensures a particularly intelligent standard of energy management within the car serving to make maximum use of the energy contained in the fuel in generating superior driving dynamics and at the same time to increase motoring comfort to an even higher standard, thus generating Sheer Driving Pleasure from each and every drop of fuel. The intelligent hybrid concept comprises both the generation and use of electrical energy, with loss-free storage of electric power ensured by the highperformance lithium-ion battery. Both the process of charging the battery and the supply of power to the electric motor as well as all other power-consuming items are ensured and masterminded by power electronics developed specifi - cally for BMW ActiveHybrid 7. Electric power generated on no extra fuel as an additional energy reserveBMW ActiveHybrid technology uses energy converted into heat and therefore wasted in conventional cars through the operation and use of the brakes. In terms of power generation, this unique technology is therefore an ongoing development proceeding from the Brake Energy Regeneration used by BMW on all model series in the brand’s current gasoline and diesel models with BMW Effi cientDynamics. The result is even faster and dynamic acceleration, while the electrical energy obtained in this way is generated without any additional consumption of fuel as soon as the car is rolling or the driver applies the brakes. Two interconnected on-board networks for flexible management of energyElectric power generated in overrun and when applying the brakes on BMW ActiveHybrid 7 in a neutral process without any additional consumption of fuel is fed into the car’s two on-board networks: BMW ActiveHybrid 7 features both a conventional 12-volt on-board network fed by an AGM (absorbent glass mat) battery and a high-voltage battery featuring lithium-ion technology and operating at 120 V. This lithium-ion battery supplies power to the electric motor as soon as it is required to perform an additional drive function or serves to start the combustion engine. The two on-board networks are connected with one another by a voltage converter providing fl exible energy management also serving to operate all electrical functions on the car on electric power generated without any additional consumption of fuel. The 12-volt battery is fed with energy from the high-voltage network, which it supports itself whenever necessary, for example when starting the combustion engine cold. Cutting-edge energy storage technology: lithium-ion battery with superior capacity and multi-cycle operating strengthIntroducing the lithium-ion battery, BMW is taking yet a further step into the future with particularly effi cient and, at the same time, fl exible use of electric power in the car. This means that energy generated in the recuperation process must be fed at all times and, depending on driving conditions, in a varying rhythm to a storage unit where it is kept available for subsequent use whenever required. A further requirement is to use a battery with signifi cant storage capacity for covering long distances without overrun or application of the brakes and without any bottlenecks in the supply process. The AGM batteries already used in all conventional production cars with Brake Energy Regeneration offer the advantage of being able to handle frequent and irregular charge and discharge cycles without any loss of power. A mild hybrid concept, on the other hand, makes even greater demands, thus requiring a high-voltage battery with a much higher level of performance to also supply the electric motor with the energy capacity required for its drive function. The system developed for BMW ActiveHybrid 7 is based on the most advanced lithium-ion technology meeting the greatest demands in terms of power loads and lasting operation. Despite its high level of performance, the lithium-ion battery measures just 37 x 22 x 23 centimetres (14.6 x 8.7 x 9.1 inches) and weighs a mere 27 kg or 59.5 lb. Hence, it is hardly larger than a conventional car battery and is housed conveniently in the luggage compartment between the wheel arches of BMW ActiveHybrid 7, safely surrounded by a high-strength special casing. This ensures perfect protection of the battery and at the same time helps to give the car precise weight distribution. ---- V8 power unit with BMW TwinPower Turbo and High Precision InjectionThe combustion unit featured in BMW’s fi rst hybrid luxury saloon is not only particularly powerful, but also the most effi cient engine of its kind. Indeed, the combination of BMW TwinPower Turbo Technology and High Precision Injection ensures an exceptionally good balance of performance and fuel consumption, the 4.4-litre V8 applying the principle of BMW Effi cientDynamics on a particularly high level. A further advantage is that the all-aluminium power unit offers the qualities typical of an eight-cylinder in an incomparably sporting and, at the same time, comfortable rendition, combining superior power and pulling force from low engine speeds with an impressive surge of thrust and traction throughout the entire speed range, as well as excellent running smoothness. Given these features, the V8 is indeed the ideal foundation for a hybrid concept in the luxury class serving to ensure outstanding effi ciency, fascinating driving dynamics and supreme motoring comfort all in one. The eight-cylinder power unit featured in BMW ActiveHybrid 7 develops maximum output of 330 kW/449 hp between 5,500 and 6,000 rpm. At the same time this supreme V8 maintains huge torque of 650 Newton-metres/479 lb-ft consistently all the way from 2,000 to 4,500 rpm. Electric motor starting and supporting the V8 power unitBMW ActiveHybrid 7 owes its characteristic driving features to the harmonious symbiosis of the combustion engine and the electric motor providing a smooth and effi cient supply of power at all times. The electric motor supports the V8 power unit in developing even greater power and torque for superior performance. Under less dynamic driving conditions the drive power provided by the electric motor enables the combustion engine to run under more favourable load conditions for maximum effi ciency, thus optimising its operating qualities. The additional power reserves serve at the same time to give this unique saloon outstanding supremacy under all conditions, the reduction of engine speed at a steady level of road speed improving not only the standard of effi ciency, but also the running smoothness of the combustion engine. The electric motor generates additional drive power of 15 kW/20 hp, with maximum power increasing to an even more substantial 20 kW/27 hp in the generator mode charging the lithium-ion battery. Peak torque, in turn, is 210 Newton-metres or 155 lb-ft. In the driving mode BMW ActiveHybrid 7 benefi ts from maximum output of 342 kW/465 hp and peak torque of 700 Newton-metres/516 lb-ft. So far only much larger engines were able to provide comparable power and performance, in most cases with a corresponding increase in fuel consumption. BMW ActiveHybrid 7, by contrast, combines its signifi cantly enhanced power and performance with an equally impressive increase in effi ciency. Average fuel consumption in the EU test cycle of 9.4 litres/100 kilometres (equal to 29.1 mpg imp) and a CO2 rating of 219 grams per kilometre proves that BMW ActiveHybrid Technology is most certainly a highly innovative and futureoriented rendition of the BMW Effi cientDynamics development strategy. Unique: eight-speed automatic transmission in combination with Auto Start StopTo transmit the drive power developed jointly by the V8 power unit and the electric motor, BMW ActiveHybrid 7 comes with a newly developed eight-speed automatic transmission specifi cally tailored to the demands and potentials of hybrid technology. This high-tech transmission of the latest standard combines gearshift comfort, sportiness and effi ciency at a level never seen before. A particular highlight of the new eight-speed automatic transmission is the innovative gearset confi guration providing two additional gears and a larger overall gear range than on the six-speed automatic transmission used by BMW so far without any negative repercussions in terms of size, weight, and inner effi ciency. With the number of gears increased to eight, the differences in engine speed from one gear to the next are smaller than before, despite the overall range of gear ratios. This, in turn, benefi ts the sporting character of the transmission and, as a result, the dynamic performance of BMW ActiveHybrid 7 again so typical of the brand. And last but not least, the smaller differences between gears ensure an even higher standard of gearshift comfort in this new luxury saloon. The combustion engine, electric motor and eight-speed automatic transmission form one complete unit set out for maximum effi ciency in BMW ActiveHybrid 7. This is also confi rmed by the innovative rendition of the Auto Start Stop function already featured as standard in BMW’s four-cylinder models with manual gearshift. Now this cutting-edge technology serving to reduce both fuel consumption and emissions is combined for the fi rst time with automatic transmission and further optimised in its effi ciency. This confi guration of Auto Start Stop helps to switch off the engine more frequently and for a longer period, thus reducing fuel consumption even more effectively. This is made possible by the particularly effi cient starter system, activation of the combustion engine by the electric motor supplied with power from the high-voltage battery enabling the engine to start extremely quickly and without any vibrations. Unrestricted climate comfort in a stopover, auxiliary cooling for pleasant starting conditionsThe climate control system in BMW ActiveHybrid 7 is supplied with power directly from the high-voltage battery, thus ensuring all the usual functions regardless of whether the combustion engine is currently running or not. Hence, operation of the Auto Start Stop function does not mean any restrictions in terms of comfort or motoring pleasure, the driver’s and passengers’ desired temperature being maintained consistently within the car also in traffi c congestion or when making a stopover in city traffic. Yet a further advantage is that the a/c compressor initiates its cooling function much earlier than in a conventional car, the air conditioning in BMW ActiveHybrid 7 thus offering qualities unique the world over in terms of function and effi ciency only possible with the high-performance lithium-ion battery. Efficiency made visible: special display conceptThe innovative drive components featured in BMW ActiveHybrid 7 have a positive effect under all driving conditions on the effi ciency and dynamic performance of this high-tech saloon. Their current level of effi ciency and the operating mode are presented by special gauges in the cockpit and on the Control Display. Featuring the most advanced black panel technology, the instrument cluster in BMW ActiveHybrid 7 is supplemented by an energy fl ow display in the lower section of the rev counter, a blue arrow showing the current status of recuperation. Superior suspension technology for maximum supremacy on the roadBMW ActiveHybrid 7 combines superior effi ciency with a truly fascinating driving experience. Over and above the drive system as such, the sophisticated suspension technology featured in the BMW 7 Series gives this new saloon its unparalleled supremacy. Interaction of a double track control arm front axle with an Integral-V rear axle offers not only numerous benefi ts in terms of comfort and driving dynamics, but also unusually smooth and harmonious anti-roll and transition behaviour in bends. The compound brake system on BMW ActiveHybrid 7 ensures truly excellent stopping power in every situation bringing the car safely to a standstill with minimum stopping distance even from high speeds. Inner-vented discs and swing-calliper brakes front and rear optimised for their effi ciency guarantee extreme resistance to fading and maximum brake comfort. ---- Optimum visibility, all-round protection, maximum safetyAs options supplementing the bi-xenon headlights featured as standard, the High-Beam Assistant and Adaptive Headlights including a bending light function, variable light distribution and adaptive headlight range control, set new standards when motoring at night. Again available as an option, the Head-Up Display serves to project data relevant to the driver to the windscreen of the car, enabling the driver to check out the data transmitted directly into his line of vision without even taking his eyes off the road. Apart from frontal and hip/thorax airbags, the Occupant Safety Package featured in BMW ActiveHybrid 7 also comprises curtain head airbags at the side as well as three-point inertia-reel automatic seat belts with belt force limiters on all seats and a belt latch function at the front. Perfectly networked: BMW ConnectedDrive with innovative functionsAs an option BMW ActiveHybrid 7 is naturally available with the innovative driver assistance systems provided by BMW ConnectedDrive, including Lane Change Warning, Lane Departure Warning, Speed Limit Info, BMW Night Vision even able to detect individual persons, a back-up camera and BMW Side View. At the same time BMW ConnectedDrive also comprises a wide range of innovative features and technologies networking the occupants with the car itself and the surrounding world in order to provide both maximum comfort as well as optimised use of the infotainment services and enhanced safety. Particularly the extended wheelbase version of BMW ActiveHybrid 7 offers maximum driving comfort, extension of the car’s wheelbase by 14 centimetres or 5.5" ensuring particularly comfortable access to the rear passenger compartment. And thanks to the special design of the roofl ine and C-pillars, the side view of the longer version, despite greater headroom for the rear-seat passengers, retains the overall impression of the ”regular” saloon with its normal wheelbase. Best of Hybrid: fl exible development for optimised concepts on each modelThe hybrid components featured in BMW ActiveHybrid 7 were developed jointly by BMW and Daimler in a cooperation project seeking to develop and test components for hybrid drive in luxury performance cars. Apart from the electric motor and the lithium-ion battery, this joint venture also served to develop the power electronics for the high-voltage network featured in BMW ActiveHybrid 7. Each manufacturer subsequently integrated the hybrid components into the respective model in accordance with individual, brand-specifi c requirements. These unique characteristics also come out clearly in BMW ActiveHybrid 7 through the combination of an eight-cylinder power unit with electric drive. BMW ActiveHybrid is based on a modular principle which, following the Best of Hybrid strategy, ensures perfect integration of the optimum component in various vehicle concepts. Hence, the mild hybrid concept of BMW ActiveHybrid 7 is tailored ideally to the specifi c requirements of this model as is the full hybrid concept for BMW ActiveHybrid X6, likewise reaching production standard in the year 2009. |
Full story BMW 7-Series
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