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Technology & Innovation Hyundai Motor and Kia Unveil ‘Active Air Skirt’ Technology to Help Electric Vehicles Go Faster and Farther

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Technology & Innovation Hyundai Motor and Kia Unveil ‘Active Air Skirt’ Technology to Help Electric Vehicles Go Faster and Farther

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  • (Press Release) Hyundai Motor and Kia Unveil ‘Active Air Skirt’ Technology to Help Electric Vehicles Go Faster and Farther Hyundai Motor Company and Kia Corporation unveiled the ‘Active Air Skirt’ (AAS) technology that minimizes the aerodynamic resistance generated during high-speed driving, effectively improving the driving range and driving stability of electric vehicles (EVs).
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Technology & Innovation Hyundai Motor and Kia Unveil ‘Active Air Skirt’ Technology to Help Electric Vehicles Go Faster and Farther

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Hyundai Motor and Kia Unveil ‘Active Air Skirt’ Technology to Help Electric Vehicles Go Faster and Farther

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Technology & Innovation 202401230830
Hyundai Motor and Kia Unveil ‘Active Air Skirt’ Technology to Help Electric Vehicles Go Faster and Farther

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  • AAS technology controls the turbulence generated during high-speed driving by operating variably depending on the vehicle’s speed
  • Installed between the front bumper and the front wheels, AAS is hidden during normal operation but operates at speeds over 80 km/h when the aerodynamic resistance becomes greater than the air resistance and is stored again at 70 km/h
  • Taking into account the specificity of the E-GMP platform, it is positioned only in front of the tires without completely covering the front end
  • Aerodynamic enhancements of the technology increase downforce, which improves vehicle traction and high-speed stability
  • As a result of being tested in the GV60, it is expected to reduce the drag coefficient by 2.8 percent and improve the driving range of electric vehicles
Hyundai Motor and Kia Unveil ‘Active Air Skirt’ Technology to Help Electric Vehicles Go Faster and Farther

SEOUL, January 23, 2024 – Hyundai Motor Company and Kia Corporation today unveiled the ‘Active Air Skirt’ (AAS) technology that minimizes the aerodynamic resistance generated during high-speed driving, effectively improving the driving range and driving stability of electric vehicles (EVs).


AAS is a technology that controls the flow of air entering through the lower part of the bumper and effectively controls the turbulence generated around the vehicle wheels by operating variably according to the vehicle speed during high-speed driving.


In the EV era, competition to secure a better driving range from a single charge has become fierce, making the relationship between vehicles and aerodynamics even more important. Furthermore, aerodynamic performance has a significant impact not only on power performance but also on driving stability and wind noise.


In response, manufacturers are exploring various measures to reduce the coefficient of drag (Cd), which is the resistance coefficient of the air acting in the opposite direction of the vehicle’s motion.

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AAS is installed between the front bumper and the front wheels of the vehicle and is hidden during normal operation, but it operates at speeds over 80 km/h when the aerodynamic resistance becomes greater than the rolling resistance and is stored again at 70 km/h. The reason for the difference in deployment and storage speeds is to prevent frequent operation in specific speed ranges.


Also, the reason why AAS only covers the front part of the tires without completely covering the front is related to the characteristics of Hyundai Motor Group’s E-GMP platform for EVs. This is because it is more effective in improving aerodynamic performance to only cover the tire part since the platform floor is flat. This also functions to enhance downforce of the vehicle, thereby improving vehicle traction and high-speed stability.


AAS can also operate at speeds over 200 km/h. This was possible thanks to the application of rubber material on the lower part, which reduces the risk of external objects splashing and damaging while driving at high speeds and ensures durability.

AAS installed on GV60 (rendered)
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AAS installed on GV60 (rendered)
Hyundai Motor and Kia have tested and reduced the drag coefficient (Cd) by installing AAS in Genesis GV60.
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Hyundai Motor and Kia announced that they have tested and reduced the drag coefficient (Cd) by 0.008, improving drag by 2.8 percent, by installing AAS in Genesis GV60. This is a figure that can expect an additional range improvement of about 6 km.


Hyundai Motor and Kia have applied for related patents in South Korea and the United States, and plan to consider mass production after durability and performance tests.


“This technology is expected to have a greater effect on models such as SUVs where it is difficult to improve aerodynamic performance,” said Sun Hyung Cho, Vice President and Head of Mobility Body Development Group at Hyundai Motor Group. “We will continue to strive to improve the driving performance and stability of electric vehicles through improvements in aerodynamics.”


Meanwhile, Hyundai Motor and Kia are applying various technologies, such as rear spoilers, active air flaps, wheel air curtains, wheel gap reducers and separation traps, to vehicles to secure competitive drag coefficients. Hyundai IONIQ 6, which incorporates these technologies, has achieved a global leading Cd of 0.21.

Hangmo Cho

Global PR Contents · Hyundai Motor Company

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About Hyundai Motor Group

Hyundai Motor Group is a global enterprise that has created a value chain based on mobility, steel and construction, as well as logistics, finance, IT and service. With about 250,000 employees worldwide, the Group’s mobility brands include Hyundai, Kia and Genesis. Armed with creative thinking, cooperative communication and the will to take on any challenges, we strive to create a better future for all.


More information about Hyundai Motor and its products can be found at:

http://www.hyundaimotorgroup.com or Newsroom: Media Hub by Hyundai , Kia Global Media Center (kianewscenter.com) , Genesis Newsroom


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