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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.

An amazing Group B rally car collection heads to auction

Kicking off in 1982, the Group B era spawned some of the most fearsome rally cars of all time. The technologically advanced pioneers of all-wheel drive and turbocharging defined a time when automakers had carte blanche to build machines with unrestricted power, without the burden of homologating a large number of road cars to qualify. The results were sometimes deadly, leading the FIA to ban the class after 1986. Now, a collection of seven Group B monsters is headed across the block in Paris as part of the Artcurial auction, held in partnership with France's famed Retromobile show. The show has been delayed to June, however. There's a 1985 Peugeot 205 Turbo 16, one of 20 Evo II models that helped the company achieve two championships in Group B's short run. This particular example was driven by world champion Timo Salonen at the 1986 Swedish Rally, where it finished seventh due to an oil filter seal failure. Bruno Saby subsequently drove it at the 1986 Tour de Corse and Peugeot entered it at the 1986 Acropolis Rally as well. It's still registered to Peugeot Talbot Sport and represents a French technological achievement, according to Artcurial, comparable to the Concorde or TGV train. Representing Italy are a pair of Lancias in the iconic Martini livery. The Lancia 037 helped Bel Paese clinch its only Group B victory in 1983, after a hard-fought rivalry with Audi. It's one of the few Group B cars that weren't AWD, achieving its success the old-fashioned way, through lightness and superb handling. A second Lancia, a 1986 Delta S4, was the culmination of the Italian firm's later Group B efforts and one of Saby's favorites. While Group B was no more in 1987, the S4 was the predecessor to the Delta Integrale that would dominate WRC from 1987 through 1992. While the collection also includes greats like a Ford RS200, Renault 5 Maxi Turbo, and MG Metro 6R4, the centerpiece is the Audi Quattro Sport S1. The ultimate Group B machine, it introduced all-wheel-drive and turbocharging to the sport. It also employed the wildest use of wings and air dams to generate downforce. Tunable up to 590 horsepower, it could rocket to 60 mph in about three seconds. The car offered for sale came straight from Ingolstadt, a 1988 model built for the Race of Champions of ex-Group B cars. The collection was amassed in the late 80s and early 90s, not long after Group B's dissolution.

Driving the Aston Martin DBX, Audi SQ5 and Hyundai Palisade | Autoblog Podcast #670

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor, Green, John Beltz Snyder and Contributing Editor Joe Lorio. First, they talk about driving the Aston Martin DBX, Audi SQ5 and Autoblog's new long-term Hyundai Palisade. They discuss the news, including the Jeep Wagoneer and Grand Wagoneer, the BMW i4 and iX, and the Kia EV6. Last, but not least, they dig into the mailbag to help a listener choose a replacement for a long-serving Honda Pilot. Autoblog Podcast #670 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 Cars We're Driving 2021 Aston Martin DBX 2021 Audi SQ5 Long-term 2021 Hyundai Palisade News 2022 Jeep Wagoneer is here: gigantic, luxurious and packing big V8 power BMW EV news BMW Group announces an armada of EVs that includes the full Mini range BMW i4 revealed as the 3 Series' EV sidekick BMW iX xDrive50 isn't just greener on the road, but from the get-go Kia EV6 electric car revealed with curvy sheetmetal Spend My Money Feedback Email – Podcast@Autoblog.com Review the show on iTunes Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related Video: Aston Martin DBX in Stirling Green | On road, off-road and on the track