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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.

Next Audi Q7 to debut with electric turbocharger?

For years, the concept of an electric turbocharger was essentially a joke sold on eBay to boost power in your slammed Civic, but in the last five years it has moved from an idea on a piece of paper to a feasible reality. Audi has already toyed with a showcase of the cutting-edge tech in road cars with the RS5 TDI concept. Now, reports suggest an electric turbo may make it to the streets as soon as next year in the next-gen Q7 (spy shot pictured above).
"I can confirm we are working on the development of the e-boost definitely," said Ulrich Weiss, Audi's diesel engine boss, to Australia-based Drive. He didn't give an exact timeframe but hinted at sometime next year, possibly in the Q7. He also suggested the chance of an RS-branded diesel model in the vein of the RS5 TDI concept on the horizon, as well.
This tech isn't entirely new for the folks in Ingolstadt. Audi's R18 endurance racer already uses such a system to capture waste heat from the engine, converting it to electric power to further power the hybrid car. The RS5 TDI concept employs a similar idea with a 3.0-liter, twin-turbocharged V6 with an electric supercharger to make up for the turbo lag. It's able to pump out 385 horsepower and 553 pound-feet of torque and allegedly sprint to 62 miles per hour in four seconds.

Despite EV push, Audi will lead hydrogen for VW Group

The cynics among us will assume that Volkswagen Group would rather not affix its flagship brand name to its main hydrogen fuel-cell efforts in the wake of that German automaker's diesel-emissions scandal. Instead, there's less of a taint in having those efforts led by VWs Audi division. And that's exactly what's going to happen, reportedly. Audi will lead Volkswagen's way towards selling hydrogen fuel-cell vehicles to the general public, Automotive News Europe reports, citing comments Audi's new development head Stefan Knirsch recently made at VW headquarters in Germany. That first effort may come in the form of the H-Tron Quattro concept SUV that Audi unveiled at the Detroit Auto Show in January. That model is slated to have a 373-mile range on a full tank of hydrogen (using the optimistic European driving cycle) and includes a rooftop solar panel that can add 621 miles a year via sun rays. And true to Audi's performance-driving bent, the car will offer up to 282 horsepower and 406 pound-feet of torque, for a 0-62 miles per hour time of under seven seconds. Audi will also look to cut production costs by reducing precious metals such as platinum in fuel-cell stacks. As for plug-in vehicles, Audi said at last November's Los Angeles Auto Show that as much as 25 percent of new Audis will be plug-in vehicles by 2025. A month later, Audi said that the A3 E-Tron, which was launched in Europe in late 2014, was already accounting for a quarter of Audi sales in the Netherlands and Norway. Related Video: Featured Gallery Audi H-Tron Concept View 25 Photos News Source: Automotive News Europe-sub.req. Green Audi Volkswagen SUV Hydrogen Cars