BMW ActiveHybrid 5February 3, 2012
The BMW ActiveHybrid 5 can accelerate from 0 to 62 mph in 5.9 seconds yet also achieve 44 mpg and cover almost 2.5 miles on electric power alone.
The BMW ActiveHybrid 5 brings together a BMW TwinPower Turbo six-cylinder in-line engine, an electric drive system and an eight-speed automatic gearbox for the first time.
The latest generation of BMW ActiveHybrid technology also adds precisely controlled intelligent energy management to the mix. All of which gives the BMW ActiveHybrid 5 an exceptional balance of performance and fuel economy for the premium executive car class.
The drive system generates combined output of 340 hp, allows the car to be driven on electric power alone up to 37 mph, accelerates the BMW ActiveHybrid 5 from 0 to 62 mph in 5.9 seconds, cuts average fuel consumption to between 40 – 44 mpg and has CO 2 emissions of just 149 – 163 g/km (figures according to EU test cycle, may vary according to the tyre format specified).
The 306 hp six-cylinder in-line engine with BMW TwinPower Turbo technology in the BMW ActiveHybrid 5 is the same unit in the BMW 535i. The electric motor develops 40 kW/55 hp and is supplied with energy by a high-performance lithium-ion battery integrated into the luggage area. Power from the two drive systems is transferred to the rear wheels by the eight-speed automatic gearbox. Its full-hybrid construction enables purely electric and therefore local emission-free driving in urban conditions.
In order to fully exploit the potential of the BMW ActiveHybrid technology, the intelligent energy management of the power electronics uses a host of innovative functions to ensure the drive system runs efficiently. Charging of the high-performance battery primarily takes place during coasting or braking, the electric motor performing the role of a generator feeding energy into the high-voltage battery. However under acceleration the electric motor takes on a boost function. Here, it assists the petrol engine by generating a dynamic burst of power.
Moreover, while coasting at speeds of up to 100 mph in ECO PRO mode, the combustion engine can be switched off and fully decoupled. This coasting mode combines comfortable driving with optimum utilisation of the kinetic energy already generated. To avoid periods with the engine running at idle – at junctions or in traffic tailbacks, for example – the BMW ActiveHybrid 5 is equipped with a hybrid start-stop function. The power electronics in the BMW ActiveHybrid 5 are also linked up with the standard-fitted Navigation system Professional. This allows forward-looking analysis of the driving situation, enabling the drive components to be primed to deliver maximum efficiency (the effect may vary according to the quality of the available navigation data).
All the hybrid-specific components of the drive technology and energy management systems have been developed specially for use in the BMW ActiveHybrid 5.
The “ActiveHybrid 5” lettering on the C-pillars, the BMW kidney grille with galvanised slats and the exhaust matt chrome tailpipes set the exterior apart from the other models in the range. Available as an option are 18-inch Streamline light-alloy wheels with excellent aerodynamic efficiency.
The BMW ActiveHybrid 5 is the only model in the BMW 5 Series line-up to be available in the exterior paint shade Bluewater metallic.
It’s price will carry a considerable premium over the BMW 535i.
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