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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.

The Aston Martin DB11 leads this month's list of discounts

We've got something of a broken record to report this month. The 2020 Acura NSX and 2020 Aston Martin DB11 have swapped places atop the discounts leaderboard for a fourth month in a row. For the month of March 2011, it's the British entry again in the lead. The DB11 earns top billing with an average discount of $24,614 off its sticker price, meaning buyers are paying an average transaction price of $177,206. That still a large suitcase full of bills, but at least it means buyers get to stare at a drop-dead beautiful coupe in their driveways with as much as 630 horsepower underhood. And if you love Aston Martin's svelte sense of style but don't want to spend quite so much money, you could always choose the 2020 Vantage that's selling for around $143,000. That's nearly $13,600 off that car's sticker, which is enough to land in seventh spot overall. Up next, as we've come to expect, is the Acura NSX. The hybrid-powered supercar from Japan is selling for $137,663 on average this month, which represents a $22,340 discount and seems like an exceptional deal for a 573-horsepower technological marvel that can scoot from 0-60 in just 2.9 seconds. That also represents the largest percentage of savings off the sticker this month. In third place for the month is the Audi R8, making March the second straight month that this trio of supercars has led the list of discounts. Buyers are saving $18,331 off the R8's sticker, which equals an average transaction price of $175,508. That's awfully close to the selling price of the DB11, for those lucky enough to be deciding between the two. Related Video: Driving Iron Man's Favorite Supercar, The Acura NSX | Translogic 215

Autoblog Minute: Nokia to sell Here mapping for $3.1B

In a three company partnership the German automakers BMW, Audi and Daimler are set to take ownership of Nokia's Here mapping technology. Autoblog's Eddie Sabatini reports on this edition of Autoblog Minute. Show full video transcript text [00:00:00] In a battle for Nokia's highly coveted mapping technology the auto industry claims victory over Silicon Valley. I'm Eddie Sabatini and this is your Autoblog Minute. In a three company partnership the German automakers BMW, Audi and Daimler are set to take ownership of Nokia's Here mapping technology. The Wall Street Journal writes that the automakers had concerns that the technology might fall under the [00:00:30]control of companies like Google, Uber, or Apple. The purchase, worth a reported 3.1 billion dollars, is still subject to antitrust evaluation before it's finalized; but this early news is already a big win for the German three. Ownership of Nokia's Here tech means that automakers won't lose control of the information systems that go into their cars. The deal, if approved, is expected to close in first quarter of 2016. For Autoblog, I'm Eddie Sabatini. [00:01:00] Autoblog Minute Logo Autoblog Minute is a short-form video news series reporting on all things automotive. Each segment offers a quick and clear picture of what's happening in the automotive industry from the perspective of Autoblog's expert editorial staff, auto executives, and industry professionals. Audi BMW Autoblog Minute Videos Original Video