Page 40 - ATZ WORLDWIDE

DEVELOPMENT AERODYNAMICS

Active Aerodynamic Parts © Magna

for Exhaust-gas Reduction

AUTHOR

Magna Exteriors has accelerated development work in active
aerodynamic systems. This includes exterior vehicle systems
Anthony Povinelli
such as Active Grille Shutters (AGS), active front deflectors, is Global Product Line Director
for Active Aerodynamics at
active underbodies and others. Magna Exteriors in Troy (USA).

GLOBAL STANDARDS AERODYNAMIC DRAG IMPACTS NEDC at 33 %. Components of vehicle
drag include ram air, skin friction and
In the USA, as CAFE standards increase, The Environmental Protection Agency wake, and are roughly 55 %, 10 % and
manufacturers are not advancing fast (EPA) and the New European Driving 35 % respectively.
enough to meet the 2025 requirement of Cycle (NEDC) both have substantial Since about 50 % of the energy used
4.32 l/100 km (54.5 mpg). Additionally, requirements for speeds over 40 mph at 40 mph (64 km/h) is to overcome
as illustrated in FIGURE 1, global CO 2 reg- (64 km/h); 34 % and 19 % respectively. aerodynamic drag, solutions that reduce
ulations have automakers looking for The proposed Worldwide Harmonised drag have the largest opportunity to
powertrain, lightweight and active aero- Light Duty Driving Test Procedure make significant impacts toward meet-
dynamic solutions. (WLTP) standard is even higher than ing requirements. Additionally, due to
38