Aerodynamics

IAV can develop active and passive measures for significantly reducing truck drag

Aerodynamically optimized trucks use five to ten percent less fuel which also reduces their CO2 emissions – a key argument in the light of climate change and rising diesel prices. For this reason, IAV wants to play an active part in reducing the aerodynamic drag of trucks with total weights ranging from 7.5 to 40 tons.

Our teams are made up of specialists who fully understand every aspect of aerodynamics. This allows them to provide their clients with comprehensive advice as early as the concept phase and join them in defining cost-efficient measures for application in volume production. Passive measures include the use of rear fairing (less drag) and diffusors at the semitrailer’s rear end which have a positive influence on swirl vortices. Special side skirting and gap fairing between truck and trailer also noticeably reduce drag. This can also be achieved with active measures – such as reducing the vehicle’s pressure drag by using suction or blast air on the trailer. Particularly important here, however, is a deep understanding of the overall system: The compressor must be rated in a way that really does reduce the truck’s fuel consumption despite the additional component.

We not only use simulations in our development projects: On request, we also team up with clients to conduct studies in the wind tunnel – through to tests using real-world prototypes.