Audi Patents Details Active Aero Wheels, Electric Quattro All-Wheel Drive System
February 10, 2014 9:17 AM
comment(s) - last by
Patent also shows aerodynamic wheels
Although there are numerous patents that get filed and never applied to real-life products, a couple of a few patents from automaker Audi have turned up that are reportedly going to be used in a production vehicle within the next two years.
The patents are for “active” aerodynamic wheels and an electric all-wheel drive system. The patent for the wheels shows a hinged flap between the spokes that move over the spokes of the wheels as speed increases. Once fully deployed, the hinged flaps create a flat wheel surface, reducing drag.
Active Wheel Shutters on the Ford Atlas Concept
Audi says that the fully enclosed wheels smooth the airflow and help improve the aerodynamics of the vehicle. When the car starts to slow down, the flaps reopen. The flaps are also temperature sensitive and if the brakes become too hot, the flaps open to allow cooling air inside.
It's hard to imagine the extra complexity of this sort of wheel justifying any fuel efficiency improvements gained by better aerodynamics, but the Germans are known for using overly complex electrical/mechanical systems.
Ford showed a
similar active flap system with its Atlas concept truck at the 2013 Detroit Auto Show
, but that feature didn’t make it into the
all-new 2015 F-150
Audi Quattro LaserLight Concept
The other Audi patent is for electric all-wheel drive technology, outlining a system with an electrically driven rear axle. The patent is for software systems that use sensors in the wheels to detect when the wheels break traction on slippery surfaces.
The patent outlines a system that would use regenerative braking that varies according to road conditions. The sensors would detect speed differences between the front wheels and rear wheels to determine how much braking force is appropriate.
This article is over a month old, voting and posting comments is disabled
RE: Complex nonsense!
2/11/2014 3:39:44 PM
Works fine on the Model S and all current EVs.
RE: Complex nonsense!
2/11/2014 10:07:34 PM
Nissan Leaf is FWD. Spark EV is FWD. Volt while not strictly speaking an EV is FWD. So not all current EV's regenerate through the rear wheels. The article wasn't about EV's but a hybrid. Front wheel only regen has more potential.
A number of factors will work against the effectiveness of rear wheel only regen. The vehicle featuring the electric rear axle will be a modified front wheel drive vehicle with a substantially forward weight bias. Less weight on the rear wheels means that less braking is able to be done by the rear wheels. Weight shifts forward during braking i.e. off the rear wheels meaning less braking is able to be done by the rear wheels. This would translate to a system capable of fairly low rates of deceleration under regenerative braking.
RE: Complex nonsense!
2/12/2014 4:38:19 PM
It occurs to me that there are factors which will mitigate these effects in the Model S. The model S isn't a converted FWD car so it doesn't have the forward weight bias. A higher portion of the vehicle weight is carried by the rear wheels. In fact 52% of its weight is born by the rear wheels so it has a slight rearward weight bias. The model S having its battery pack in the floor of the car has a very low center of gravity. This has the effect of reducing weight shifts during braking (and accelerating and cornering) to a minimum.
Tesla is developing an AWD version of the model S which should have very effective regenerative brakes.
"There is a single light of science, and to brighten it anywhere is to brighten it everywhere." -- Isaac Asimov
2015 Ford F-150 Loses 700 Pounds, 95% of Body Structure is Made of Aluminum Alloys
January 13, 2014, 12:26 AM
Ford Atlas Concept Previews More Efficient Next Generation F-150
January 15, 2013, 2:13 PM
Hot Air? President Obama, G7 Pledge to Eliminate Most Fossil Fuel Use by 2100
June 8, 2015, 5:40 PM
Study Predicts Self-Driving Vehicles Could Rake in Billions
March 6, 2015, 8:34 AM
Dual-Motor Tesla Model S P85D's "Insane Mode" Shocks Passengers
January 28, 2015, 11:18 PM
2016 Cadillac CTS-V Packs 640 hp Punch with 200 mph Reach
January 23, 2015, 3:25 PM
BMW Testing Tech to Allow Users to Auto-Park, Summon Cars Via Smartwatch
December 16, 2014, 9:30 AM
Lamborghini Offers Up $6,000 Leather-Bound Android Smartphone
December 12, 2014, 3:12 PM
Most Popular Articles
As iPad Sales Wane and Watch Flops, iPhone Saves Apple's Profit With Its Heroics
July 22, 2015, 6:13 PM
Editorial: Reddit Allows Itself to be Hijacked as a Hate Platform For Racist Bigots
July 21, 2015, 6:32 PM
Microsoft July 29 Windows 10 Launch: Freebies, Rollout, and What's Next
July 21, 2015, 2:40 PM
Mozilla and Facebook to Adobe: It's Time to Kill Flash
July 20, 2015, 6:30 PM
Google Scores Bizarre Court Win as Disgruntled Android Users' Lawyers Ruin Case
July 16, 2015, 5:58 PM
Latest Blog Posts
Sceptre Airs 27", 120 Hz. 1080p Monitor/HDTV w/ 5 ms Response Time for $220
Dec 3, 2014, 10:32 PM
Costco Gives Employees Thanksgiving Off; Wal-Mart Leads "Black Thursday" Charge
Oct 29, 2014, 9:57 PM
"Bear Selfies" Fad Could Turn Deadly, Warn Nevada Wildlife Officials
Oct 28, 2014, 12:00 PM
The Surface Mini That Was Never Released Gets "Hands On" Treatment
Sep 26, 2014, 8:22 AM
ISIS Imposes Ban on Teaching Evolution in Iraq
Sep 17, 2014, 5:22 PM
More Blog Posts
Copyright 2015 DailyTech LLC. -
Terms, Conditions & Privacy Information