The BMW Group trial car “Energy BEV” offered throughout #NEXTGen explores what’s technically attainable. The car is fitted with three fifth-generation electrical drive models and has a most system output in extra of 530 kW/720 hp. This permits it to speed up from zero to 100 km/h (62 mph) in comfortably underneath three seconds.
The event crew’s purpose right here was to construct an experimental car which impresses not solely with its longitudinal dynamics but additionally by way of lateral dynamics. Certainly, as drivers would anticipate from a BMW, it has been designed not solely to be quick in a straight line but additionally to place a smile on the driving force’s face thorough keenly taken corners.
To this finish, the chassis and powertrain engineers labored collectively significantly carefully to maximise the automotive’s efficiency. Key to its dynamic attributes is that the 2 electrical motors on the rear axle are managed individually. This brings e-torque vectoring into play, which allows most drive energy to be translated into ahead propulsion even in extraordinarily dynamic driving manoeuvres.
The result’s simpler and exact than with a restricted slip differential, as a result of actively focused inputs are attainable in any driving state of affairs. In contrast, a restricted slip differential at all times reacts to a distinction in rotation pace between the pushed wheels.
The drive system includes three fifth-generation drive models, every of which brings collectively an electrical motor and the related energy electronics and energy take-off inside a single housing. One is mounted on the entrance axle and two (a double drive unit) on the rear axle. One other notable side of this era alongside its eye-catching energy is that it’s fully freed from uncommon earths. An electrical motor of this sort will make its sequence manufacturing debut within the BMW iX3. The iX3 will solely have one motor, although, reasonably than three.
A present BMW 5 Sequence manufacturing mannequin serves because the donor automotive for the Energy BEV. Integrating a drive system of this sort right into a manufacturing automotive represents a critical technical enterprise, but it surely has been achieved right here with completely no restriction in passenger compartment area. This makes it far simpler to evaluate this drive idea alongside alternate options.
It has additionally allowed the engineers to look much more successfully into the chances opened up by two individually controllable electrical motors on the rear axle with e-torque vectoring.