Tesla Patent Describes Using Fans to Increase Vehicle Downforce
The granted patent details a system using battery-powered fans to manage airflow beneath the vehicle, potentially benefiting the delayed Roadster.
Tesla has been granted a new patent describing a fan system designed to increase vehicle downforce and reduce aerodynamic drag. The technology, which relies on battery-powered fans to manage airflow beneath the car, was granted this morning ahead of the company’s now-delayed Roadster event.
What Happened
The patent outlines a system that draws air through an inlet located beneath the vehicle, moves it through a duct, and expels it from a rear outlet. By accelerating airflow under the floor, the system creates a lower-pressure area that helps stick the vehicle to the road. The rear outlet is larger than the inlet, acting as a diffuser that allows air to expand and slow down before meeting the surrounding air. This arrangement is specifically noted to increase downforce while reducing drag. Diagrams in the filing show four electric fans positioned side by side, separated by vertical fins known as strakes to help manage airflow.
Why It Matters
Unlike passive aerodynamic devices that depend on vehicle speed to generate downforce, Tesla’s proposed fans would create downforce independently of how fast the car is moving. This makes the system potentially useful in slower corners as well as at higher speeds, improving cornering grip, braking stability, and high-speed handling. The system is expected to activate automatically when vehicle conditions meet specified criteria, such as a speed threshold. The filing, which originated from a provisional application on January 17, 2023, and a full application on January 17, 2024, suggests the technology could be relevant for the Roadster, particularly if it utilizes optional gas thrusters.
The Bottom Line
Tesla’s Roadster event has been delayed to October 15, leaving just over two weeks until the company reveals its plans for the vehicle's aerodynamics. While this patent highlights an active airflow management system, recent reports have also covered a separate patent for an active wing, hinting at multiple potential aerodynamic innovations for the upcoming launch.
