It had to happen. BMW cultivates pleasure of driving. And this also goes for their E-cars. Even more so, as they have excellent torque and therefore massive pulling power. And what’s more, you can use several motors at once.
So it was only a matter of time that a trial car with superpower is created. Here it is: BMW Group presented its “Power BEV” during its #NEXTGen event in Munich.
Just before we go further, just explain here a bit more on the #NEXTGen event: From 25 to 27 June 2019 the company invites selected international journalists, analysts and further stakeholders to “BMW Group #NEXTGen” at BMW Welt in Munich. With this event, The BMW Group chooses a new direction with regard to how it presents its future technologies, services and products.
But back to the car now. Indeed, BMW explores with this “Versuchswagen” what is technically possible. A BMW 5 Series was taken off the production line, and then fitted with three fifth-generation electric drive units, resulting in a maximum system output in excess of …530 kW/720 hp. This transforms the 5-Series into a supercar: with this power, it accelerates from 0 to 100 km/h in comfortably under three seconds.
But it is not only about straight line performance, it is also about handling. A true BMW also puts a smile on the driver’s face through corners, and so the engineers got to work on the chassis and suspension.
Separately controlled motors provide unseen agility…
To this end, the chassis and powertrain engineers worked together particularly closely to maximise the car’s performance. Key to its dynamic superb qualities is that the two electric motors at the rear axle are controlled separately. This brings e-torque vectoring into play, which enables maximum drive power to be translated into forward propulsion even in extremely dynamic driving manoeuvres.
The result is more effective and precise control than with a limited slip differential, because actively targeted inputs are possible in any driving situation. By contrast, a limited slip differential always reacts to a difference in rotation speed between the driven wheels, and therefore is slower to react.
As said, the drive system comprises three fifth-generation drive units, each of which brings together an electric motor and the associated power electronics and power take-off within a single housing. One is mounted at the front axle and two (a double drive unit) at the rear axle. Another notable aspect of this generation alongside its eye-catching power is that it is entirely free of rare earths. An electric motor of this type will make its series production debut in the BMW iX3. The iX3 will only have one motor, though, rather than three.
A series production car forms the basis…
As said, a current BMW 5 Series production model serves as the donor car for the Power BEV. Integrating a drive system of this type into a production car represents a serious technical undertaking, but it has been achieved here with absolutely no restriction in passenger compartment space. This makes it far easier to assess this drive concept alongside alternatives.
It has also allowed the engineers to look even more effectively into the possibilities opened up by two separately controllable electric motors at the rear axle with e-torque vectoring.
And that means, in future series-production vehicle projects, that the right technology can be selected for the model at hand. Customers will therefore be provided with the most appropriate technology for their choice of vehicle concept. Wow! Needless to say, we are now looking to the E-future with a very broad smile! Driving pleasure will be certainly part of it!
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