2004 Audi Tt 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.

Wagons make a bit of a comeback, with new models, sales on the rise

Consider this an official invitation to hop on the wagon bandwagon. There's still tons of room because, well, it's a wagon (and market share is still extremely small). But according to new data, the segment is growing. According to a report from Bloomberg, using data from Edmunds.com, roughly 211,600 Americans purchased wagons in 2018. That is technically down from the 237,600 sold in 2017, but wagon sales in the U.S. are up 29 percent from where they were five years ago. It's also the third year in a row that wagon sales broke the 200,000 mark. The sales trends have been somewhat representative of the availability of wagons. New models have debuted during the past 5 years and therefore offer more opportunity at more brands to buy wagons. In addition to more modest cars such as the Volkswagen Golf Sportwagen, several luxury and performance brands are offering wagons today, such as Mercedes-Benz, Audi, Porsche, Jaguar, Volvo and Buick. (Bloomberg's headlines make the point that "crossovers are for the Kardashians," and wagons are just, well, classier.) This uptick in brand-name availability, as well as extremely well-executed design on most of the wagons currently available, has helped increase the segment's desirability. That, and its ability to better accomplish the same tasks at hand while standing out from the crossover and SUV crowd. Still, the posted numbers represent a small fraction of the total vehicles sold. According to the data, wagons only held a 1.4 percent market share in 2017, the segment's best recent year. Wagons hold a steadfast place in America's past, and they're writing an interesting new story. With the downturn in traditional cars, they may continue to create an unexpected narrative. Related Video: News Source: Bloomberg, Edmunds Audi BMW Buick Volkswagen Volvo Wagon station wagon

US-bound Audi A3 Sedan spied testing

As the Audi A3 sedan gets closer to its debut, Audi has camouflaged prototypes to take it on the streets for final testing. Last time we saw the A3, it was testing almost in the buff, but it was on a closed track so our spy shooters were kept at quite a distance.
Now that the newest Audi sedan is testing on public roads, our latest batch of spy shots gives us a more detailed look at the entry-level luxury player despite the swirly camo. Except for the oversized wheels and the fancy exhaust outlets and door mirrors, the production version of the car should look almost identical to the A3 sedan concept we saw in Geneva a couple years ago. Some of the details we can see include a good-sized panoramic roof that stretches almost halfway into the rear passenger space and signature Audi LED-accented headlights and taillights.