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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.

Audi H-Tron Concept is a familiar face now with hydrogen power

Audi shows its green side at the 2016 Detroit Auto Show with the H-Tron Concept, a hydrogen-fueled version of the recent E-Tron Quattro concept. The new fuel-cell powertrain gives the futuristic crossover an estimated range of 372.8 miles on the European cycle, and the company claims that the solar panel that spans the roof could let drivers recoup 621 miles of range each year from the sun's rays. The H-Tron's powertrain benefits from both the fuel cell and a lithium-ion battery for an extra boost. The hydrogen system alone can produce 148 horsepower, and three tanks under the passenger compartment carry the fuel. The battery can also provide enough energy for an extra 134 hp for short periods. Its combined torque rating of 406 pound-feet is impressive. The Audi puts the power down through electric motors at the front and rear axle to allow for an electrified version of Quattro all-wheel drive, and the automaker claims the concept could accelerate to 62 miles per hour in less than 7 seconds. Other than the new coat of eye-catching yellow paint for Detroit, the H-Tron looks largely the same as the E-Tron Quattro, and both of them also ride on the Volkswagen Group's second-generation modular longitudinal platform. The most notable tweaks to the outside are the smoother hood and larger openings in the lower fascia of the latest concept. The two vehicles are also twins on the inside, and they both feature cabins with Audi's latest virtual cockpit with OLED screens. Zero emissions: the Audi h-tron quattro concept Audi h-tron quattro concept High range, swift refueling, sporty road performance: The Audi h-tron quattro concept car can boast all these virtues. It combines a highly efficient fuel cell achieving an output of up to 110 kW with a powerful battery that can provide a temporary boost of 100 kW. The car can be fully refueled with hydrogen in around four minutes, and is then ready to drive for up to 600 kilometers (372.8 mi). In another major step, Audi will go into production with its new technologies for piloted driving and parking in 2017 along with the next generation of the A8 luxury sedan. The technology study already provides a glimpse of things to come. The Audi h-tron quattro concept is another milestone along the path towards future mobility.

Next-gen Audi S7 looking hot in Southern Europe

Development on the next-gen Audi S7 is in full swing. The handsome hatchback is still popular, even if it is starting to show its age, so we have high hopes for the new model. We have some new spy photos of the car performing hot-weather testing in Southern Europe. We don't have many details or a firm release date, but there are a few things we can pull from these pics. The new model looks like it will retain the same general shape as the current one. That's a good thing, as the A7 is one of the best looking vehicles on the market. The long and flowing roof, frameless doors, and long wheelbase all look to be present. There are hints of the Audi R8 from the A-pillar forward while the large grille looks exactly like the on new Audi A8. Many of these design elements are straight off of the Audi Prologue concept from a few years back. Like other Audi S models, the S7 has a wide bumper with large intakes at the bottom corners. A chin spoiler appears to channel air down under the car. Around the side, we can see big wheels and brakes. There are side skirts along the bottom. Out back, it has the requisite quad exhaust tip, a dead giveaway that this is an S model. Lighting both front and rear appears to be LED. What rests under the hood is arguably the car's biggest mystery. We can count on Quattro all-wheel drive and an eight-speed automatic, but we don't know if it will have a turbocharged V6 or V8 under the hood. At this point, both seem equally likely. Horsepower and torque should both be in the mid-400 range while 0-60 mph times should be around 4.5 seconds. Look for more news this fall. Related Video: Featured Gallery Audi S7 Spy Shots View 12 Photos Image Credit: CarPix Spy Photos Audi Luxury audi s7