Audi R18 e-tron quattro

Technical data

Evolution of a revolution

The Audi R18 e-tron quattro only starts its second race season in 2013 – but it is already a legend: exactly like the Audi R10 TDI, the first hybrid racecar to win the 24 Hours of Le Mans was voted by an Automobile Club de l’Ouest (ACO) jury to be one of the most important Le Mans racecars of all time.
Through the intelligent combination of a conventionally powered rear axle with an electrically powered front axle the Audi R18 is transformed into an e-tron quattro – the first Audi racecar which is not powered exclusively by a combustion engine. The system located in the front of the car comprises of two driveshafts and a Motor Generator Unit (MGU) together with planetary gearbox, which retrieves its own energy from the electric flywheel accumulator mounted alongside the driver in the cockpit.
The energy is recuperated and stored during braking. In the process, the front wheels drive the Motor Generator Unit. This accelerates electrically a carbon-fiber flywheel, which runs in a high vacuum. Once the corner is taken and the driver accelerates again, the system delivers the energy to the front axle – but as the regulations state, however, only above a speed of 120 km/h.

Technical data Audi R18 e-tron quattro (2013)
Version: February 2013

Vehicle

Vehicle type Le Mans Prototype (LMP1)
Monocoque Carbon-fiber composite with aluminum honeycomb, tested according to the stringent FIA crash and safety standards
Battery Lithium-ion battery

Engine

Engine Turbocharged V6 engine, 120-degree cylinder angle, 4 valves per cylinder, DOHC, 1 Garrett turbocharger, mandatory intake air restrictor with 1 x 45.1 mm diameter, turbo boost pressure limited to 2.8 bar absolute, TDI diesel direct injection, fully stressed aluminum cylinder block-crankcase
Electronics Bosch MS 24
Engine lubrication Dry sump, Castrol
Displacement 3,700 cc
Power output Over 360 kW (490 hp)
Torque Over 850 Nm

Hybrid system

Accumulator type Electric flywheel accumulator, max 500 kJ, WHP
Motor-generator unit MGU on the 0000front axle, water-cooled with integrated power electronics, 2 x 80 kW

Drive / transmission

Type of drive Rear-wheel drive, traction control (ASR), e-tron quattro four-wheel drive from 120 km/h
Clutch CFRP clutch
Transmission Sequential, electrically operated 6-speed sport gearbox
Differential Limited-slip rear differential
Transmission housing CFRP with titanium inserts
Drive shafts Constant velocity sliding tripod universal joints

Suspension / steering / brakes

Steering Electrical assisted rack and pinion steering
Suspension Front and rear double-wishbone independent suspension, front push rod system and rear pull rod system with adjustable dampers
Brakes Hydraulic-dual-circuit braking system, mono-block light alloy brake calipers, ventilated carbon fiber disk brakes front and rear, infinitely manually adjustable front and rear brake balance
Wheels O.Z. magnesium forged wheels
Tires Michelin Radial, front: 360/710-18; rear: 370/710-18

Weight / dimensions

Length 4,650 mm
Width 2,000 mm
Height 1,030 mm
Minimum weight 915 kg
Fuel tank capacity 58 l