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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.

Power for the people who need crossovers | 2018 Audi SQ5 First Drive

The 2018 Audi SQ5 is pretty simple. It's the sporty version of the redesigned Q5. It's for the enthusiast. The buyers skew male, and Audi pitches it as the solution for when an S4 doesn't meet your needs. It's a 354-horsepower purple pill for the Dad who's resigned himself to driving a crossover — but still wants to have some fun. The SQ5 is simple, but it's also very important. The Q5 is Audi's best-seller, and a sportier sibling makes the entire family look good. The midsize crossover segment is big business, and the performance industry is hot. Archrivals Mercedes, BMW, and Porsche have formidable entries. A few years ago a hotted-up crossover was a nice thing for an automaker to develop – a bonus addition to the lineup. Now it's essential. The SQ5 definitely feels like the right vehicle at the right time. Cruising around Vancouver Island outside Victoria, the stately capital city of British Columbia, we're having heck of a good time. The crossover, based on a platform shared with the larger Q7, feels nimble and eager. Breaking free from early morning traffic, we find the Trans-Canada Highway, cue up Dynamic mode, and take off. Dynamic mode adds heft to the steering, lowers the vehicle 0.6 inches from Auto mode, and deepens the exhaust note. It's low, growly, and sounds surprisingly good. The 3.0-liter TFSI engine has plenty of punch. You know it from the S4 and S5. Like those cars, the SQ5 now ditches the supercharger for turbo power. It was a mildly controversial move as the blown motors in the S4 and S5 gave those cars true muscle-car character. We've made our peace, and turbos just seem like the natural move for the SQ5. Audi is quick to point out the wide torque curve – you get 369 pound-feet sooner than with the supercharger, and output is 23 more pound-feet than before. The horsepower remains the same, though it maxes out slightly sooner in the band. Audi says the turbo, mounted in the middle of the engine's V, makes the SQ5 more responsive, and with all of the low-end torque, we agree. It certainly feels capable as we open it up, finding gaps in traffic, side-stepping tree haulers and deftly out-maneuvering slow-moving motorists. We find a rhythm on the Pacific Rim Highway, smoothly tackling the curves, pulling the paddles for quick downshifts from the eight-speed automatic Tiptronic transmission, and aggressively accelerating before giving way to common sense. It's a beautiful drive.

Audi SQ7 coming, will have electric turbo

Formula 1 and endurance racing are already harvesting energy from turbos on the track, and now it's apparently time for a similar idea of boosting the efficiency of forced induction to hit the streets in a high-performance, diesel SUV.
In a recent interview with the UK's Autocar, Audi technical boss Dr. Ulrich Hackenberg let the big news slip. "The new Q7 will be available in the market next year but the electric turbo will come a bit later in the Audi SQ7 available in 2016," he said. The e-turbo system was already rumored for the premium SUV but for the standard model, not this just-announced performance version.
Audi has been experimenting with the e-turbo system for a little while, as an electrically driven supercharger. It showed up on the RS5 TDI concept that used a 3.0-liter, twin-turbocharged diesel V6 plus the electric system to diminish turbo lag. In that application, it provided an impressive 385 horsepower and 553 pound-feet of torque and an alleged sprint to 62 miles per hour in 4 seconds. Although, Dr. Hackenberg didn't make it clear if this was the exact layout for the SQ7.