2006 Audi Tt Convertible Auto on 2040-cars

Auto blog

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.

Junkyard Gem: Fully depreciated 2001 Audi A8 L 4.2 Quattro

A great big A8 with a long wheelbase and all-wheel-drive is just the thing for a serious player with an oligarch-grade bankroll and the need to get to important corporate meetings during the worst Colorado snowstorms, and we're betting that's how this 15-year-old A8 L's original owner saw it. The problem with cars like this is that big, complicated, expensive machinery tends to develop big, complicated, expensive problems once the aging process sets in, and third or fourth owners of high-end German luxury cars tend to lack the resources needed to keep those cars going. So, those S-Classes and 7-Series and A8s end up in a place like this when something expensive breaks at age 15. This one, which has a very straight body and decent interior, now sits in its final parking space, among the Daewoo Leganzas and Volvo 850s in the imports section of a Denver self-service yard. If you're good with the wrenches and have some Audi expertise, you can't beat the luxury-per-buck deal of a solid 10-to-15-year-old A8; the price for a runner tends to be about the same as that for a tattered Corolla of the same age. This car's base price was $69,946 in 2001, or just over 95 grand in inflation-adjusted 2016 bucks, and it's packed full of leading-edge engineering that's still fairly advanced today. Related Video:

Audi planning S3 Plus with 375 hp?

There's a war being waged in Europe for the highest output from the smallest displacement. Alfa Romeo has managed to squeeze 240 horsepower and 260 pound-feet of torque out of a 1.7-liter turbo four for the 4C. Mercedes-Benz has coaxed 355 hp and 332 lb-ft out of a 2.0-liter turbo four to drive the new A45 AMG, CLA45 AMG and GLA45 AMG. But not to be outdone, the Volkswagen Group is said to be working on one of its own that will put both to shame.
The engine is reportedly being based on VW's existing 2.0-liter turbo four, only enhanced to produce a massive 375 hp and 369 lb-ft of torque. The key to getting there was poaching Friedrich Eichler, the engineer who designed AMG's aforementioned high-output engine, and mandating him to do still better.
That's all well and fine - and perfectly impressive - but just what does VW plan on doing with the new engine? A whole lot, according to reports. It's expected to power the new Scirocco and a new Golf R Evo expected to debut at the Beijing Motor Show in April, and you can bet it'll be slotted into another few applications as well. But the first vehicle expected to get it will be the Audi S3 Plus.