Audi has extensively developed its all-electrically
powered high-performance R8 e-tron sports car further. The technology study is
one of the highlights of the 2015 CES Asia, and it brings together future technologies
– which relate to lightweight design, high-performance drive systems and
functions for piloted driving.
The Audi R8 e-tron piloted driving concept car is
based on the multimaterial Space Frame of the new production R8. A rear car
body module made of carbon fiber reinforced polymer (CFRP) integrates the
luggage compartment, which extends the frame structure. The walls of the
luggage compartment shell are corrugated, so that they can absorb extreme
amounts of energy with little material weight in case of a rear-end collision.
Thanks to specific modifications made to the outer shell and wheels, the Audi
R8 e-tron piloted driving attains a low Cd value of 0.28. Its front end and
sideblades feature e-tron specific lighting solutions.
The R8 e-tron piloted driving achieves an electric
range of 450 kilometers instead of a previous 215 kilometers, its energy density was increased from 84 Wh/kg to 154 Wh/kg and several
other modifications were made. The high-performance sports car has the Combined
Charging System (CCS) on board, which allows charging with direct and
alternating current. With this system, the customer can charge the large
battery in significantly less than two hours.
The two electric motors each output 170 kW of power
and 460 Nm of torque to the rear axle. The R8 e-tron piloted
driving rockets from 0 to 100 km/h in 3.9 seconds on its way to
an electronically-governed top speed of 210 km/h or 250 km/h, depending on the car’s tires. Intelligent energy management and an
electromechanical brake system enable high energy recuperation rates. Targeted
torque vectoring – needs-based distribution of power transmission between the
rear wheels – ensures maximum stability and dynamism.
The R8 e-tron piloted driving technical study is
equipped with all of the functions of piloted driving. Data is acquired from
the interplay of an array of sensors: a new type of laser scanner, several
video cameras, ultrasonic sensors and radar sensors at the front and rear.
Based on signals from these sources, the central driver assistance control unit
(zFAS), a compact central computer, computes a comprehensive picture of the
vehicle’s environment.
Audi can build the R8 e-tron in handcrafted quality
to meet special customer requests. The company uses its high-performance
electric sports car primarily as a high-tech mobile laboratory.