FAT aerodynamic research promotes climate protection
The aim of the German automotive industry is to implement pioneering steps that lower CO2 emissions. Though motor vehicles today are already efficient and energy-saving, efficiency is still being increased. In addition to new motors, optimized transmissions, hybrid engines and lightweight construction, especially energy-saving vehicle aerodynamics is the focus of innovative development.
Aerodynamic measures are especially effective for reducing fuel consumption. In this regard, optimizing the wheelhouses in the autobody can also make a large contribution. Car wheels generate up to 30% of the driving resistance.
The energy-saving effect of aerodynamics strongly depends on driving speed. At higher speeds - starting already at 70 km/h - the effect is considerable. Reducing the cw value by 10% leads to a decrease in fuel consumption of about 1.5% in the European driving cycle (NEDC). At a constant of driving speed of 120 km/h, an improvement in cw already corresponds to a 3-4% reduction in consumption.
In a 3-year project, the OEM's und suppliers carried out joint research in the Working Group ‘Aerodynamics' of the Research Association of Automotive Technology (FAT). Based on the results, new constructive measures were implemented to reduce the drag in the wheels and wheelhouse. The newest generation of cars profits from this. The research projects used modern wind tunnels with realistic facsimiles of road driving through rotating wheels and treads. The aerodynamic research was largely carried out at qualified university institutes for fluid mechanics and aerodynamics.
The Research Association of Automotive Technology (FAT) is an association of more than 50 major German automotive companies including passenger and commercial vehicle manufacturers and suppliers. The task of FAT is to promote the precompetitive joint research for motor vehicles. In this connection, manufacturers, suppliers and scientists work together with the goal of creating the basis for new products.
signed Dr. F. Preißer