Audi R18 e-Tron hybrid quattro announced for Le Mans

Audi R18 e-Tron hybrid quattro 29.02.2012
Audi R18 e-Tron hybrid quattro 29.02.2012

Audi has announced the new R18 e-tron quattro, an entirely new form of Le Mans prototype race car. Brimming with new drive technology, the vehicle is the first LMP1 car to incorporate a diesel hybrid powertrain that runs in concert with Audi's e-tron quattro all-wheel drive system.

The operating principle of the R18 e-tron quattro starts with a kinetic energy recovery braking system on the front axle which sends electricity into a flywheel accumulator before being sent back down to the electric motors on the front wheels. Energy from the accumulator can only be retrieved under acceleration above 120 km/h (74 mph).

Meanwhile, the V6 TDI power plant producing 510 HP (375 kW) simultaneously transmits power to the rear wheels. The system is operationally similar to Porsche's flywheel KERS system on their 911 GT3 R Hybrid, except it is a mild hybrid which cannot operate on electricity alone and uses a petrol engine in the rear.

For its premiere event in Munich today, head of Audi Motorsport, Dr. Wolfgang Ullrich, drove the new Audi R18 e-tron quattro onto the stage electrically and almost silent.

To compensate for the additional weight of the hybrid system, a new gearbox with a carbon-fiber composite housing, a first for endurance racing, was developed for the R18.

In addition to the R18 e-tron quattro, Audi will also field an R18 Ultra which is identical to the R18 e-tron quattro but without hybrid drive. As a result, the R18 Ultra is the lightest Le Mans prototype that Audi Sport has ever built.

The R18 e-tron quattro will make its race debut at the 6-hour race at Spa-Francorchamps (Belgium) on May 5 and then onto the famous 24 Hours of Le Mans (France) on June 16/17. At Le Mans, Audi Sport Team Joest will field two R18 e-tron quattro and two R18 ultra prototypes.

Audi brings the quattro back to the race track

  • World premiere in Munich: the new Audi R18 e-tron quattro
  • Four-wheel driven diesel hybrid for the 24 Hours of Le Mans
  • Audi ultra lightweight as base for the application of hybrid technology

Motor sport is used yet again by AUDI AG to pioneer new technology: the brand with the four ring's new Le Mans race car is the world's first LMP1 car to combine a highly-efficient TDI with a hybrid system. quattro drive also celebrates its comeback to the race track with the prototype - in a entirely new form.

Audi R18 e-tron quattro is the name of the new Le Mans prototype that makes its race debut on May 5 in the 6-hour race at Spa-Francorchamps (Belgium) and fights for overall victory at the famous 24 Hours of Le Mans (France) on June 16/17. Audi unites two technologies in a fascinating way to create a new type of drive, which is also already being tested for future use in production cars: e-tron quattro.

Hiding behind this description is the next generation four-wheel drive with which Audi combines the advantages of the proven quattro drive with the potential of electromobility. To this end one vehicle axle is powered conventionally, the second by electric motors.

"Audi has always consciously selected championships and categories in racing that have a close relationship to production and therefore have technical relevance for the Audi customers," explains Head of Audi Motorsport Dr. Wolfgang Ullrich, who personally drove the new Audi R18 e-tron quattro onto the stage on Wednesday evening during its world premiere in the Audi Training Center at Munich airport - electrically and almost silent. "quattro, TFSI and TDI are three excellent examples of how motorsport has stimulated production development. A similar tendency is apparent with the e-tron quattro: we test a completely new technology on the race track before it's introduced to the Audi production line."

On the Audi R18 e-tron quattro kinetic energy is recovered on the front axle during the braking phase. It is fed as electric into a flywheel accumulator before being retrieved under acceleration again above a speed of 120 km/h. During this procedure only the front axle is integrated. The V6 TDI power plant producing 375 kW (510 hp) continues to transmit its power to the rear wheels. Both systems complement each other to create the new drive principle e-tron quattro.

Project began in February 2010

The project e-tron quattro for motorsport started in February 2010. Only 18 months passed from the initial conceptual ideas to the first test. "This is a relatively short cycle for a technology that has never been tested in motorsport and which still doesn't even exist in production," stresses Dr. Martin Mühlmeier, Head of Technology at Audi Sport. "The challenge is correspondingly big."

Audi Sport developed the Audi R18 ultra in parallel to the Audi R18 e-tron quattro - because Audi takes a two-pronged approach this year in the 24 Hours of Le Mans and in the newly created FIA World Endurance Championship (WEC) - the 2012 model year Audi R18 is built with and without hybrid drive. The trick: the base of both cars is completely identical, which is why the additional logistical effort is kept limited for Audi Sport and the race team.

"The TDI engine invented by Audi is still the most efficient drive in the world," says Dr. Wolfgang Ullrich. "We are convinced that the TDI has even more potential. This is why Audi not only supports the hybrid in motorsport as it does in production, but in parallel also the further development of the conventional drive."

Innovation in transmission area

The R18 e-tron quattro's twin brother more than lives up to its model name ‘R18 ultra': it is the lightest Le Mans prototype that Audi Sport has ever built. To compensate for the additional weight of the hybrid system the subject of lightweight design and construction was the focus throughout development of the 2011 Le Mans race winning R18 TDI. In addition to the many detail optimizations there is also a genuine innovation in the transmission area: a new gearbox with a carbon-fiber composite housing was developed for the R18 - a premiere for endurance racing.

"The new R18 ultra is a distinct evolution of last year's Le Mans race winning car," summarizes Head of Audi Motorsport Dr. Wolfgang Ullrich. "Our drivers' impressions were very positive from the first moment. Without the weight optimized R18 ultra we would have not been capable of realizing the R18 e-tron quattro which is absolutely identical with the exception of the hybrid system."

Le Mans 2012: two R18 e-tron quattro and two R18 ultra

Audi Sport Team Joest will field two R18 e-tron quattro and two R18 ultra prototypes in the Le Mans 24 Hours on June 16/17. The two hybrid cars are driven by last year's winning trio Marcel Fässler (CH), André Lotterer (D) and Benoît Tréluyer (F) as well as Dindo Capello (I), Tom Kristensen (DK) and Allan McNish (GB) who boast a total of 13 Le Mans wins between them. New signing Loïc Duval (F) starts together with Timo Bernhard (D) and Romain Dumas (F) in an R18 ultra as do Marco Bonanomi (I), Oliver Jarvis (GB) and Mike Rockenfeller (D).

Audi Sport Team Joest also contests the World Championship round at Spa-Francorchamps (Belgium) on May 5 in the same formation. At the same time the race doubles as a dress rehearsal for the 24 Hours of Le Mans. Only Mike Rockenfeller will miss this race due to a clashing date with the DTM.

After the 24 Hours of Le Mans, Audi plans to enter an R18 e-tron quattro and an R18 ultra in the FIA World Endurance Championship (WEC). André Lotterer and Allan McNish have been nominated as the drivers so far.

At the World Championship opener at Sebring (USA) on March 17, Audi Sport Team Joest relies on the proven R18 TDI from last year, which are driven by Marcel Fässler/André Lotterer/Benoît Tréluyer, Dindo Capello/Tom Kristensen/Allan McNish as well as Timo Bernhard/Romain Dumas/Loïc Duval.

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Comments (13)

JamesFinch-knightley JamesFinch-knightley
From track to street: Audi drivers and engineers explain the importance of tyres All car drivers are aware that they are black, round and keep their expensive alloy wheels off the ground but not many appreciate the benefits of choosing the right tyres for their car and style of driving. Michelin has interviewed some of the team’s drivers and race engineers to find out why they choose to fit Michelin tyres and why they feel fitting the correct tyres is important from a racing and road car point of view. And no, it’s not because the tyres are supplied free of charge as race teams pay like anyone else. Unlike Formula 1, endurance racing tyres are closely linked, in terms of size and performance characteristics, to those used on high performance road cars. Endurance racing calls for tyres that will last as long as possible while offering high levels of grip in various conditions from their first lap to their last. As a result, in last year’s Le Mans 24 hour race, the No.2 Audi R18 TDI managed to race for 750kms on one set of tyres, and at speeds of up to 330km/h with three Peugeots in hot pursuit. In 2012 Audi will field two R18 e-tron quattro’s and two R18 ultra prototypes at Le Mans – all shod with Michelin tyres. The two hybrid cars will be driven by last year’s Le Mans winning trio of Marcel Fässler, André Lotterer, and Benoît Tréluyer with Dindo Capello, Tom Kristensen, and Allan McNish in the other car. The R18 Ultra will see Loïc Duval joined by Timo Bernhard and Romain Dumas with the other R18 Ultra driven by Marco Bonanomi, Oliver Jarvis and Mike Rockenfeller. In the video, drivers Allan McNish and Tom Kristensen, and race engineer Howden Haynes share their views and experiences of tyres and talk about how innovation in motorsport benefits drivers with better cars and tyres. Video Links: http://www.youtube.com/watch?v=82W_ROmr1JA http://www.youtube.com/watch?v=L-9OuXwR3Oo For all the latest news on the Le Mans 24 Hours please visit http://www.mymichelin.co.uk/race-series/24-Hours-of-Le-Mans
Mar 7th, 2012 7:28pm
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vilivo vilivo
That ultra model sounds like this year's winner. The lighest TDI Audi ever at LM!!! Competing against WHOM, realistically? Oh, yeah, thets right- the 1st Hybrid Audi... A bit 1 sided, still love the idea of that Ultra tho.
Mar 1st, 2012 2:54pm
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catchmyshadow catchmyshadow
i love it and it´s not ugly. It`s built for one purpose: to destroy the competition.
Mar 1st, 2012 1:12pm
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loki loki
Sooo, with it being a hybrid diesel, I'm assuming they won't even need to refuel. During the Spa 6-hours at least.
Mar 1st, 2012 11:41am
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quattrosport quattrosport
Cool stuff. I agree with M!, it's kinda ugly but at this stage of competition, engineer are not looking for esthetic I guess. 26 years after the Porsche 961, it is the second car with all wheel drive that will race Le Mans. This is gonna be very interesting to see how it will work, how fast it will be and if it can finish the race. Can't wait :-)
Mar 1st, 2012 11:04am
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TheAntichrist TheAntichrist
Maybe soon, Porsche will come back to Le Mans. With new gen 991 GT1.
Mar 1st, 2012 4:58pm
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Giom Giom
So, it's going to be a three way race against three team cars. Ok.
Mar 1st, 2012 10:30am
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Microice Microice
I think it will be a good way to guage whether its better to weigh less than to have a hybid system that uses less fuel, has extra power but weighs more.
Mar 1st, 2012 9:44am
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M! M!
i am sure Audi is one of the best leman team, but look at this race car. it is ugly. the designers and aerodynamics engineers probably read too much Rocketeer when they were kids.
Mar 1st, 2012 4:21am
1 1
sideskraper sideskraper
When you see it at speed around a track it is actually quite graceful.
Mar 1st, 2012 4:49am
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s2k_turbo s2k_turbo
This car is not ment to be beautyfull but fast. Look at F1 cars today that is ugly!
Mar 1st, 2012 12:17pm
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s2k_turbo s2k_turbo
This car is not ment to be beautyfull but fast. Look at F1 cars today that is ugly!
Mar 1st, 2012 12:17pm
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BanfSnieder BanfSnieder
Wow pure awesomeness, too bad they wont be fighting Peugeot this season, it seems like a lot of fire power for nothing. By the way, Audi is running out of places to put their technology monikers on their cars; TDI, E-tron, Quattro, Ultra....?!?
Mar 1st, 2012 3:03am
0 2