2003 Audi A-4 Cabriolet 3.0l Champagne Metallic on 2040-cars

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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.

How Audi will make roads friendlier to autonomous cars

Today, Audi announced some of the new projects it will be implementing on Germany's Digital Motorway Test Bed, which comprises a few sections of highway on which the government and industry can test autonomous and connected tech. Among Audi's projects is one specifically aimed at making roads easier for autonomous cars to navigate. Audi is looking to make the road and other objects more visible. The company has been researching materials that could make guardrails and road markers reflect radar waves more readily, and Audi will install test versions soon. The goal here is to help make these objects easier for the autonomous vehicle's sensors to see in inclement weather, and at greater distances in good weather. The company will also test additional road markings that will be easier to see for onboard cameras and will help the car place itself on the road. Audi will also try out new vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) technology that will be able to alert cars to speed limits, traffic conditions, ice patches and possibly allow for driving patterns such as platooning. This will be a significant step above the traffic light communication system Audi has released in select areas. The company will also be working on very detailed mapping of the area. Audi claims it will be accurate down to the centimeter. From what we've seen at MCity, the world as it stands presents all kinds of difficulties for autonomous vehicles, from worn-out signs to rough pavement. So any advances that make it easier for autonomous cars to see and communicate should help bring such vehicles to reality much sooner. Related Video: News Source: Audi Green Audi Technology Emerging Technologies Autonomous Vehicles v2v vehicle to vehicle communications vehicle to infrastructure technology connected cars v2i

Choose your own adventure in Audi's next Super Bowl commercial

Audi has a 60-second spot planned for this year's Super Bowl to promote its S6 sedan, but exactly which spot will air is being put in the hands of Internet users. The ad follows a high schooler as he "embarks on one of the most pivotal moments of his adolescence: prom night." The spot is fixed up to the pivotal moment when he steals a kiss from the prom queen. From that moment, there are three possible endings.
Today, up until 11:59 pm, Audi is running three different versions on its YouTube channel and you can vote on which ending you'd like to see during The Big Game. The winning spot will run on YouTube before the game and then run in the first ad break after kickoff during the Super Bowl. Coca-Cola is running a similar interactive campaign, although its potential endings will involve cowboys, showgirls and a post-Apocalyptic badass, none of which we expect to make it into Audi's prom night spot. Scroll below to view all three alternate ending videos and cast your vote.