In September 27, 2016, Porsche initially filed for a patent that is the “Unique Active Rear Diffuser”. And earlier this week, on April 27, 2017, the United States Patent and Trademark Office published this. When the patent was published, several images of the sketch surfaced on the internet.
We do know that some of Porsche’s vehicles already feature active deploying rear wings. And supposedly, this new patent they filed offers similar functions with the use of its unique diffuser.
Yes, diffusers do exist in cars already. But according to Porsche, what differs with the patent is that the installation and integration in the underbody region is very complicated. The location of the diffuser will have to be directly below the bumper. The purpose of this is that when the diffuser is not in use, it will blend into the body, which explains its concave inner shape.
When the diffuser is active (and in use), it will extend out - this movement direct the air along an elongated section if the tail to improve the cars aerodynamics. Depending on the car’s design, several flaps will probably be found around the rear end of the vehicle - and each one will have their own function. Again, this will depend on the vehicle, as some cars like electric vehicles, don’t come with exhaust-gas tailpipes - but the technology can be used on both traditionally powered and electric vehicles.
The filing reads: “The embodiment that runs over the entire width of the rear end may be implemented, for example, in vehicles without exhaust-gas tailpipes, such as electric vehicles”.
Some of you may remember the Huracán Performante, which has a similar technology with its Aereodinamica Lamborghini Attiva (ALA) active aerodynamic system. Though it may be similar, the Huracán was built with two flaps: one on the front fascia, and the other near the rear wing. Both of which can be adjusted for low drag and high downforce layouts, with added traction on the inner wheels when cornering.
Another one is that of the LaFerrari, which also has active diffusers that use flaps to adjust aero. However, Porsche’s system is still different as the flap is not integrated into the underbody of the car.
Porsche did not specify which models will be built with this technology just yet. However, it will benefit the company’s track-oriented cars such as the 911 GT3 and GT3 RS. But this isn’t limited to just sports car, and even lower trim vehicles can take advantage of this. And not because there is a patent, it doesn’t guarantee that the technology is actually on its way. So, lets not be surprised if we do or don’t see this technology in the near future.