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Audi is working on a suspension that gets power from bumpy roads

Regenerative brakes aren't new. They're on virtually every hybrid and EV, and they're even starting to pop up on traditional gas-powered cars, like with the i-ELOOP-equipped Mazda6. But even with these systems, cars can get more efficient, and Audi thinks it found yet another source of wasted energy. The source? The suspension. The idea is to turn the kinetic energy that goes into the dampers into usable energy instead of as waste heat. Audi isn't the first auto company to come up with regenerative suspension – nearly three years ago, ZF introduced its GenShock technology, which used a valve attached to traditional, oil-filled hydraulic shocks to recapture kinetic energy from movement caused by bumps in the road. Audi's prototype technology, which it calls eROT, replaces traditional dampers with horizontally oriented electromechanical rotary dampers. eROT is apparently short for electromechanical rotary damper. Neat. In testing, eROT recovered an average of 100 to 150 watts on a typical German road, three watts from a fresh piece of pavement, and 613 watts on a rough stretch of tarmac (wattage is calculated as power over time, so this is actually the rate at which the system harvests energy). The dampers channel that energy to a tiny, 0.5-kWh, 48-volt battery. The prototype is claimed to cut CO2 emissions by three grams per kilometer (4.8 grams per mile), while the company believes a future production version could save up to 0.7 liters of fuel per 100 kilometers of driving. Converting the savings to American miles per gallon isn't easy, so we'll use a practical example. In the US, the Q7's supercharged 3.0-liter V6 returns a combined rating of 21 miles per gallon, which works out to 11.2 liters per 100 kilometers. Apply eROT's 0.7L/100km savings, and the Q7's economy would improve to 10.5L/100km, or 22.4 mpg, a 1.4-mpg improvement. That's not huge, but because math, 0.7L/100km is more dramatic on a more fuel efficient vehicle – taking an A3's 27-mpg combined rating and adding eROT would drive efficiency up 2.4 mpg, for example. There are a few other big benefits beyond fuel and emissions savings – Audi claims eROT provides a more comfortable ride than traditional active suspensions, because engineers can tune the compression and rebound strokes independently of each other. Beyond that, the horizontally oriented rear suspension geometry means more cargo space, since the dampers don't poke up into the cabin like they normally do.

Mercedes-Maybach GLS 600 and our new long-term Acura TLX | Autoblog Podcast #661

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor, Green, John Beltz Snyder. This week, they talk about the cars they've been driving, including the Mercedes-Maybach GLS 600 and Audi A4, as well as the recently departed long-term Volvo S60 T8 and the new addition to the long-term fleet, an Acura TLX. In this week's news, they talk about the Stellantis merger completion, some more thoughts about GM at CES, BMW announcing an electric M car, an upcoming electric Lincoln Corsair and the possibility of an electric-only Ford Mustang in 2028. Autoblog Podcast #661 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown What we're driving:2021 Mercedes-Maybach GLS 600 2021 Audi A4 S Line 45 TFSI Quattro 2020 Volvo S60 T8 2021 Acura TLX A-Spec News:Stellantis is a thing now More thoughts on GM at CES BMW announces electric M car is coming this year Electric Lincoln Corsair-E coming in 2026, report says The next-gen Ford Mustang reportedly going all-electric, arriving in 2028 Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video:

Felix Baumgartner parachutes into racing at N?rburgring 24

There are plenty of commonalities to be found between astronauts and racing drivers. Both are daredevils by definition (if not by trade), both subject themselves to unfathomable G forces and both face very real risks when strapped into machinery that makes the very best use of advanced propulsion, aerodynamics and composite construction technologies. Yet you don't find much crossover between the two. There was talk of Niki Lauda, himself an experienced pilot, training to go into space with Virgin Galactic (which itself was sister to an F1 team for a while in Richard Branson's empire), but that didn't seem to materialize. Now we're receiving news that Felix Baumgartner will contest the Nürburgring 24 Hours this year.
Felix Whomgartner, you ask? Felix Baumgartner. He's more of a skydiver than an astronaut, but he made history in 2012 when he jumped out of a space capsule and set the record for the highest altitude in a manned balloon, the parachute jump from the highest altitude, and the highest velocity freefall as part of the Red Bull Stratos initiative. In other words, he may as well be an astronaut, because he fell down to the earth's surface from the stratosphere.
For his next challenge, Baumgartner will be climbing into an Audi R8 LMS Ultra in an attempt to tackle the Nürburgring. Having contested a handful of spec races under the VW Group umbrella, he'll undertake several test sessions and practice races before the main event in June, in which he'll alternate behind the wheel with professional racing drivers Frank Biela, Marco Werner and Pierre Kaffer. The initiative is part of the Audi race experience program that allows gentleman racers to team up with seasoned pros to take part in real races. Baumgartner will undoubtedly prove its highest-profile participant.