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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.

Why we can't have better headlights here in the U.S.

It wouldn't be a European auto show if we weren't teased with at least one mainstream vehicle we can't have here. At the Geneva Motor Show last week, the small but vocal contingent of shooting-brake buffs lamented that the Mazda6 wagon won't be coming to our shores, although they can take comfort in the fact that the vehicle won't get the torquey 250-horsepower 2.5-liter turbocharged gasoline engine we'll get here. Mercedes-Benz also announced a new headlight technology in Geneva that likely won't be available here anytime soon. It's just the latest in a long line of innovative and potentially lifesaving front-lighting solutions that the federal government doesn't allow in this country due to outdated standards — and a current lack of leadership at the U.S. Department of Transportation. Mercedes-Benz's new Digital Light system that debuted in Geneva uses a computer chip to activate more than a million micro-reflectors to better illuminate the road ahead. The Digital Light headlamps works with the vehicle's cameras, sensors and navigation mapping to adjust lighting for the given location and situation and to detect other road users. The Digital Light technology also serves as an extended head-up display of sorts by projecting symbols on the pavement ahead to alert drivers to, say, slippery conditions or pedestrians in the road. And it can even project lines on the road in a construction zone or through tight curves to show the driver the correct path. Digital Light will be available on Mercedes-Maybach vehicles later this year, although like any technology it's bound to trickle down to less expensive vehicles. That is, if we ever get it here in the U.S. Audi, a leader in automotive lighting, has repeatedly run into snags trying to bring state-of-the-art car headlights to the U.S. The German luxury automaker's recently introduced matrix laser headlight system, which performs many of the same trick as Mercedes-Benz's Digital Light, also isn't legal on U.S. roads. And five years after the introduction of its matrix-beam LED lighting, which illuminates more of the road without blinding oncoming motorists with brights by simultaneously operating high and low beams, Audi still can't bring that technology to the U.S. either.

Recharge Wrap-up: Audi to build Q6 e-tron in Brussels, Boris Johnson test drives Toyota Mirai

Audi will build the Q6 e-tron at its factory in Brussels, Belgium. Production for the electric vehicle - which will be based on the concept car from the Frankfurt Motor Show in September - is slated for 2018. Its expected driving range of about 311 miles should help make it competitive against the Tesla Model X. Audi's Brussels plant is also where the A1 is made. It employs about 2,500 workers and produced about 115,000 vehicles in 2014. Read more from Automotive News Europe. During a visit to Toyota Headquarters, London Mayor Boris Johnson confirmed that Transport for London will be the UK's first Toyota Mirai customer. Mayor Johnson traveled to Japan on a three-day trade mission, and took a test drive of the fuel cell vehicle. "By embracing this technology of the future, we aim to consolidate hydrogen's role as a practical alternative fuel for the 21st century and beyond," says Johnson. "I am sure that Transport for London will provide the ideal environment for us to see everything Mirai can do and, in doing so, take another great step towards improving air quality in our city and protecting the health of Londoners." Read more from Toyota, or at Green Car Congress. The South Coast Air Quality Management District (SCAQMD) has delivered 12 electric commercial lawn mowers to government and nonprofit organizations in San Bernardino County. The donation of the electric mowers is part of a demonstration program to promote zero-emissions equipment. At prices ranging from $3,000 to $20,000, the electric mowers cost about 25 percent more than their gas-powered counterparts, but their lower operating costs can make up for the price difference in about two years. In addition, they produce about half the noise, and save about 600 pounds of harmful emissions per year. SCAQMD plans to deliver five more of the mowers as part of the same program. Read more in the press release below. SCAQMD Launches Nation's Largest Zero-Emission Commercial Lawn Mower Demonstration Program in San Bernardino SAN BERNARDINO, Calif., Oct. 13, 2015 /PRNewswire-USNewswire/ -- The South Coast Air Quality Management District today delivered a dozen new, battery-electric commercial lawn mowers to agencies in San Bernardino County as part of a long-term demonstration program to promote the zero-emission equipment.