Volkswagen has presented a new electric concept car, the Mission Efficiency. The aerodynamic and ‘production-ready’ 2+2 was built on the brand’s MEB+ platform and promises a record-low power consumtion.
Volkswagen’s Mission Efficiency concept looks like a modern reinterpretation of the brand’s iconic XL1. But unlike the innovative coupe VW launched in 2013 and sold in limited numbers, the new concept is electric, not a plug-in hybrid diesel.
Record-low drag and consumption
The Mission Efficiency concept might look rather exotic, but it was built using VW Group’s ‘humble’ MEB+ platform. That is the front-wheel drive compact car electric platform used for the ID. Polo, among other cars.
Unlike the XL1, the new concept leans far less on exotic technologies. It uses the 99 kW (135 hp) electric motor and 54,9 kWh net capacity NMC battery found in cars like the ID. Polo.
But to maximise its range, it relies on aerodynamic efficiency, which VW touts as being a world record for a ‘production-ready’ concept. The prototype has a EU type approval and complies with regulations on occupant protection and crash safety.
Three world records
As a matter of fact, the brand claims three world records. The first is a Cx of 0,158 – making this the most aerodynamic road-legal vehicle. The second record is a consumption of 6.48 kWh/100 km in ‘ideal’ conditions, at a constant speed of 68 km/h on flat surface and without using the airconditioning.
The third record is impressive: a real-world fuel consumption of 7,51 kWh/100 km including charging losses (6,89 kW/100 net consumption).
This achievement was recorded during a 1.778,36 km drive from Wolfsburg to Vienna, with an average speed of 67,72 km/h and a top speed of 138 km/h. The battery was recharged once and at the finish line 164 kilometers of range remained .
Aerodynamic efficiency over battery capacity
The Mission Efficiency is 1.392 mm high, 1.744 mm wide and 4.775 mm long. This makes it 722 mm longer than the ID. Polo, mostly due to a 100 mm longer wheelbase (2.700 mm) and longer rear overhang getting narrower near the end, to give it a drop-shaped design. Exactly that aerodynamic shape is key to the record-breaking power consumption.
Although the model’s shape alone accounts for 47% of the aerodynamic efficiency, the low drag is further achieved by active cooling vents in the front, aerodynamic wheels and deflectors, a fully closed underside, encapsulated rear wheels, flush door handles and frameless door windows.
The rear-view mirrors remain conventional, since wind tunnel tests showed replacing them by cameras would hardly have an impact. The car does however have a reduced front surface of 2,08 m².
The sum of these parts should prove that aerodynamic efficiency has a huge impact on range, and could be a better solution than just fitting a bigger battery. Moreover, the car features a 481 litre boot and its rear bench can be folded down to transport longer items.
It is rather practical, although it remains a 2+2 coupe. The panels covering the rear wheels have a volume of 16 litres each, with the possibility of storing the charging cable.
High-tech materials
The interior is minimalist, lightweight and renewable, with a ‘bring your own device’ approach. 3D printed structures, floor mats replaced by composites with integrated rubber anti-slip, fully recyclable doors without electrical elements, … the interior is well thought-out. Other items can be added by clamping them to an integrated rail.
Although the Mission Efficiency uses the MEB+ platform, it does still rely on more exotic technology to decrease the power consumption and increase the range. Most of the body panels are made of a light composite using CFRP and aramid. The glass roof incorporates a 370 W solar panel capable of generating an extra range of up to 30 km a day.
The front brakes are standard hydraulic brakes, but on the rear wheels VW has fitted electromechanical ones. The system weighs less and is more space-efficient, lending more flexibility for energy recuperation.
