Audi PB18 e-tron is an all-electric high-performance concept with the driver in full control

Article by Christian A., on August 29, 2018

Audi has unveiled an all-electric concept car at the Pebble Beach Automotive Week in Monterey, California that visualizes a radical electrically powered driving machine for both the road and the race track. The all-electric Audi PB18 e-tron Concept is essentially a design and technical study of a futuristic high-performance sports car.

Basically, the PB18 e-tron boasts of a technical concept built from Audi's years of victories at the Le Mans, as implemented through the carmaker’s high-performance arm -- Audi Sport GmbH. The “PB18” in its name refers to the place and year (Pebble Beach and 2018) it was unveiled, while the “e-tron” signifies the fact that the concept shares the technological DNA with the Audi R18 e-tron, the carmaker’s high successful LMP1 racing car.

In terms of dimensions, the PB18 e-tron is similar to a classical sports car – it measures 4.53 meters (14.5 ft.) in length, 2 meters (6.4 ft.) in width and 1.15 meters (4.6 ft) in height, with wheelbase of 2.70 meters (8.9 ft) and short overhangs.

Its front end features the hexagonal Singleframe grille with a wide and horizontal cut, as flanked by large air inlets. As typical in an Audi sports car, the Audi logo is located above at the front of the hood. The front end makes use of wide and flat light units featuring integrated digital matrix technology and laser high-beam headlights, which had its debut in the Le Mans R18 racing car. The hood of the PB18 e-tron dips deeply to serve as a lateral bridge that links connecting the accentuated fenders while also acting as an air deflector.

When viewed from the side, the PB18 e-tron reveals a gently sloping roof line pulled far to the back, making the study similar to a shooting brake concept. Supported by massive C-pillars, this design allows for 470 liters (16.6 cubic ft.) in cargo space, something sports car usually lacks.

The side of the PB18 e-tron also reveals side windows angling inwards and extremely extended wheel arches, which help highlight the concept’s wide track. The PB18 e-tron rides on large 22-inch wheels with eight asymmetrically designed spokes evoking that of turbine inlets.

On the rear, a flat red band of lights runs across the entire width of the PB18 e-tron. The rear diffuser air outlet is positioned like on a race car, although can be moved downward mechanically to heighten downforce. The rear spoiler can be extended rearward also to create more downforce.

Interestingly, the side windows angling inwards and extremely extended wheel arches of the Audi PB18 e-tron concept are traits it shares with another concept unveil last year – the Audi Aicon. More than these, these concept cars also share their electric drive, featuring solid-state battery as energy storage.

Nonetheless, while the Aicon was conceptualized as a fully automated, long-distance luxury vehicle, the PB18 e-tron is designed as a radical high performance machine boasting of high levels of dynamics and emotion. As it is, the PB18 e-tron is truly a driver-oriented high-performance electric car. While the Aicon boasts of full automation and luxuries, the PB18 e-tron doesn’t employ complex systems for automated driving and doesn’t have comfort elements that usually add weight. Because of this, people at Audi nicknamed the PB18 e-tron as “Level Zero.” No semi-autonomous driving system is installed on the concept, giving the driver in full control of steering, accelerating (gas pedal) and stopping (brake pedal).

Essentially, the PB18 e-tron is design to accommodate the driver and a passenger in a cockpit integrated into an inner monocoque shell. When the driver has no passenger on board, he or she can slide the monocoque laterally to the center, similar to in a monoposto. This is possible as the control elements are not mechanically elements – the steering and pedals have a by-wire design.

The Audi PB18 e-tron concept boasts of a lightweight body, thanks to the use of aluminum, carbon and multi-material composites. Likewise, the concept employs a lightweight solid-state battery, the weight associated with usual batteries have been avoid. In fact, the PB18 e-tron is expected to tip the scales at less than 1,550 kg (3,417.2 lbs).

Powering the PB18 e-tron are three powerful electric motors -- one on the front and two at the rear – as complemented by the quattro system. The front motor delivers up to 150 kW to the front axle while the rear motors provide up to 350 kW to the rear axle. At a typical drive, the system delivers up to 500 kW (671 hp) of max output and 830 Nm (612 lb.-ft.) of torque. However, a temporary boost can be availed to tap up 570 kW (764 hp) of output.

With this amount power, the PB18 e-tron can sprint from zero to 62 mph (100 km/h) in just over 2 seconds. The motors get their juice from 95-kWh solid state battery that allows for an estimated range of over 310.7 miles (500 km), as per WLTP. The battery can be recharged in just 15 minutes through an 800-volt charging system. Induction charging through Audi Wireless Charging (AWC) can also be used.

Supporting the PB18 e-tron is a suspension system derived from the Audi R18 e-tron quattro Le Mans racing car. Stopping power is taken care of by 19-inch carbon brake discs and the electric brake.

Press Release

World premiere at Pebble Beach – the Audi PB18 e-tron concept car

For the first time, Audi is presenting a design and
technical concept car at Pebble Beach Automotive Week in Monterey, California. The allelectric
Audi PB18 e-tron presents a radical vision for the high-performance sports car of
tomorrow. Broad and flat, visibly inspired by the wind tunnel and the race track, its very
presence signals that it is destined to push boundaries. Its concept and exciting lines were
created in the new Audi design studio in Malibu, California – where the brand’s design is
consistently being updated for the future. The technical concept of the PB18 e-tron has
benefitted from Audi's many years of winning the Le Mans racing series. The experts at Audi
Sport GmbH, the high-performance subsidiary of Audi, were responsible for implementation.
The abbreviated name “PB18 e-tron” refers both to the Pebble Beach venue for the premiere
and to the technological DNA it shares with the successful LMP1 racing car Audi R18 e-tron.
Consistently focused concepts for use
At first sight, the Audi PB18 e-tron shows its kinship with another spectacular concept car from
the brand – the Audi Aicon from 2017. This holds true not only for characteristic design
elements like the side windows that angle inwards and the extremely extended wheel arches.
The two concept cars from 2017 and 2018 also share their electric drive with solid-state battery
as energy storage.
But their respective, consistently focused concepts for use make them polar opposites. While
the Aicon was designed as a fully automated, long-distance luxury vehicle –
a business jet for the road – the creators of the PB18 e-tron designed it as a radical driving
machine for the racetrack and road. Dynamics and emotion top its list of specifications.
Parameters like propulsive power, lateral acceleration and perfect ergonomics determine each
detail. And driver-orientation is in a completely new dimension.

The internal working title at Audi for the showcar project was “Level Zero” – as an explicit way to
differentiate it from the Levels 3, 4 and 5 of autonomous driving currently in focus at Audi. In
the Audi PB18 e-tron, the driver is the one steering and stepping on the gas or brake pedal.
There are therefore no complex systems for piloted driving on board and no comfort features to
add weight. In their place are a driver’s seat and cockpit that are integrated into an inner
monocoque shell that can be slid laterally. When driven solo, the monocoque can be positioned
in the center of the interior as in a monoposto – the perfect location for the racetrack. This is
made possible not least by the by-wire design of the steering and pedals; a mechanical
connection of the control elements is not needed.
Gael Buzyn is Head of the Audi Design Loft in Malibu – where the Audi PB18 e-tron was born.
He describes the most important item in the specifications: “We want to offer the driver an
experience that is otherwise available only in a racing car like the Audi R18. That’s why we
developed the interior around the ideal driver’s position in the center. Nevertheless, our aim was
to also give the PB18 e-tron a high degree of everyday usability, not just for the driver, but also
for a potential passenger.”
When the driver’s monocoque is slid into the side position, from where the PB18 e-tron can be
steered in everyday driving like a conventional road vehicle, there is room for a passenger. An
additional seat can be accessed on the other side, integrated low above the ground and
equipped with a three-point seatbelt. The driver also benefits when getting in and out from the
easily accessible outside position of the monocoque, which can be moved when the door is open
up to the sill.
Inspiration drawn from motorsport
The Audi PB18 e-tron package follows the traditional architecture of a mid-engine sports car
with a cab that is positioned far forward. The car’s center of gravity is located behind the seats
and in front of the rear axle – which benefits the driving dynamics. This does not involve the
engine-transmission unit, as in a car with a conventional drive system, but rather the battery
pack.
A mix of aluminum, carbon and multi-material composites ensures the body of the Audi PB18
e-tron has a low basic weight. Not least thanks to the innovative and comparatively light solidstate
battery, a total weig

The PB18 e-tron is 4.53 meters long, 2 meters wide and just 1.15 meters tall (14.5 x 6.4 x
4.6 ft). These dimensions alone speak of a classical sports car. The wheelbase is 2.70 meters
(8.9 ft) and the overhangs are compact. Viewed from the side, the eye is drawn to the gently
sloping roof line which is pulled far to the back and features massive C-pillars. Together with the
large and almost vertical rear window, this design is reminiscent of a shooting brake concept –
the synthesis of a coupé with the rear of a station wagon. The result is not only a distinctive
silhouette but also, with 470 liters (16.6 cubic ft), a clear bonus in terms of cargo space –
usually a deficit in sports cars. An exclusive luggage set customized to fit the cargo space helps
to make optimum use of the luggage compartment – even if the luggage in this car frequently
consists of nothing but a helmet and racing overall.
A flat red band of lights extends across the entire width of the rear and underscores the
horizontal orientation of the vehicle body. The cabin, placed on the broad shoulders of the wheel
arches, appears almost dainty from the rear. The rear diffuser air outlet has been raised high –
another functional feature borrowed from motorsport. The diffuser can be moved downward
mechanically to increase downforce. The rear spoiler, which normally is fixed, can be extended
rearward for the same purpose.
The widely extended wheel arches located opposite the central cabin are noticeable from every
angle. They emphasize the extremely wide track of the PB18 e-tron and thereby illustrate the
lateral dynamic potential of the car and the obligatory quattro drive. The large 22-inch wheels,
each with eight asymmetrically designed spokes are reminiscent of turbine inlets – together with
the air inlets and outlets of the wheel arches, their rotation ensures excellent air supply to the
large carbon brake discs.
The front is dominated by the familiar hexagon shape of the Singleframe grille, with an
emphatically wide and horizontal cut. The brand logo is placed above at the front of the hood, in
the typical Audi sports car style. Large air inlets to the left and right of the Singleframe supply
the necessary cooling air to the brakes and the front electric motor. Wide and flat light units
with integrated digital matrix technology and laser high-beam headlights complete the face of
the PB18 e-tron.
The laser high-beam headlight with its enormous range is especially emblematic of the transfer
of know-how from motorsport: This technology made its debut in the Le Mans R18 racing car,
where the maximum light output at speeds above 300 km/h offered a crucial safety advantage
at night as well.
The Audi designers have taken a new tack for air flow through the front hood. The hood dips
deeply and acts as a lateral bridge running across the nose, connecting the two emphatically
accentuated fenders and also doubling as an air deflector. A design that is thoroughly familiar
from racing prototypes.

At the same time, this layout offers the driver a unique quality of visibility, and not just on the
race track. Looking through the large windshield from the low seating position, the driver sees
precisely into the opening of the ventilated hood and onto the road, and can thus perfectly
target the course and apex of the curve. Mounted within the field of vision is a transparent OLED
surface. The ideal line of the next curve can be shown on it, for example, precisely controlled
with data from navigation and vehicle electronics. In normal road traffic, on the other hand, the
direction arrows and other symbols from the navigation system find a perfect place here in the
driver’s field of vision, analogous to a head-up display.
The large-format cockpit itself is designed as a freely programmable unit and can be switched
between various layouts for the racetrack or the road, depending on the scenario for use.
Emotion without emissions: three electric motors and quattro drive
The concept uses three powerful electric motors – one up front and two in the rear. The latter
are centrally located between the steering knuckles, each directly driving one wheel via halfshafts.
They deliver power output of up to 150 kW to the front axle and 450 kW to the rear – the
Audi PB18 e-tron is a true quattro, of course. Maximum output is 500 kW, with boosting, the
driver can temporarily mobilize up to 570 kW. The combined torque of up to 830 newton meters
(612.2 lb-ft) allows acceleration from 0 to 100 km/h (62.1 mph) in scarcely more than
2 seconds – a speed that differs only marginally from that of a current LMP1 prototype.
In normal road traffic, the driver can limit the maximum speed in favor of range. This limitation
is easy to deactivate on the racetrack and can be adapted to local conditions.
The focus is on not just powerful performance but also maximum efficiency. While being driven,
the Audi PB18 e-tron recovers large amounts of energy: up to moderate braking, the electric
motors are solely responsible for decelerating the vehicle. The hydraulic brakes only come into
play for heavy braking.
The concept of separate electric motors on the rear axle offers major advantages when it comes
to sporty handling. The Torque Control Manager, which works together with the Electronic
Stabilization Control (ESC), actively distributes the power to the wheels of the front and rear
axles as needed. This torque control provides for maximum dynamics and stability. Thanks to
the virtually instantaneous response of the electric motors, the control actions are lightningquick.
The drive concept of the Audi PB18 e-tron adapts perfectly to every situation, whether
involving transverse or longitudinal dynamics.

The liquid-cooled solid-state battery has an energy capacity of 95 kWh. A full charge provides for
a range of over 500 kilometers (310.7 miles) in the WLTP cycle. The Audi PB18 e-tron is already
designed for charging with a voltage of 800 volts. This means the battery can be fully recharged
in about 15 minutes.
The Audi PB18 e-tron can also be charged cordlessly via induction with Audi Wireless Charging
(AWC). This is done by placing a charging pad with integral coil on the floor where the car is to
be parked, and connecting it to the power supply. The alternating magnetic field induces an
alternating voltage in the secondary coil fitted in the floor of the car, across the air gap.
High-tech from the LMP1 sport: the suspension
The front and rear have independent suspension on lower and upper transverse control arms,
and, as commonly found in motor racing, a push-rod system on the front axle and pull-rod
system on the rear – in both cases with adaptive magnetic ride shock absorbers. The suspension
of the Audi R18 e-tron quattro Le Mans racing car served as the model for the basic architecture.
The wheels measure 22 inches in diameter and are fitted with 275/35 tires in the front and
315/30 in the back. Large carbon brake discs with a 19-inch diameter, in conjunction with the
electric brake, safely and steadily decelerate the Audi PB18 e-tron even in tough racetrack
conditions.
The path to volume production – electric mobility at Audi
Audi has been developing vehicles with all-electric or hybrid drive since back in the late 1980s.
The first production offering of a car combining a combustion engine with an electric motor was
the Audi duo from 1997, which occupied the body of an A4 Avant. A landmark technological
development for electric cars was the R8 e-tron, which was unveiled at the 2009 Frankfurt
Motor Show and in 2012 set a record lap time for an electric car on the North Loop of the
Nürburgring.
Audi added a first plug-in hybrid to its range in 2014 in the guise of the 150 kW (204 hp)
A3 e-tron – its battery units can be recharged by recuperation and cable, and give it an allelectric
range of up to 50 kilometers in the NEDC. The Q7 e-tron made its debut in 2016: It is
powered by a 3.0 TDI engine combined with an electric motor, with a combined 275 kW (373
hp) and 700 Nm (516.3 lb-ft) of torque. It accelerates from a standing start to 100 km/h
(62.1 mph) in 6.2 seconds and is particularly efficient. In all-electric mode, it has a range of up
to 56 kilometers (34.8 miles) while producing zero local emissions. It is also the world’s first
plug-in hybrid with a V6 compression ignition engine and quattro drive.

Another concept car unveiled by Audi in 2015 at the Frankfurt Motor Show, was the e-tron
quattro concept – the forerunner of the brand’s first all-electric-drive production automobile.
As a radically reconfigured SUV it offers a range of more than 400 kilometers (248.5 miles) in
the WLTP cycle with the spaciousness and comfort of a typical full-size automobile from Audi.
The production version of this groundbreaking e-SUV, named Audi e-tron, will debut in
September 2018.
Roadtrip, circuit or piloted city-mobile – a new mobility service
Audi has meanwhile been building a new family of visionary automobiles since 2017 as a preview
for the next decade – electrically powered and precisely focused on their respective use
scenarios. Cars currently in the market are always conceived as a versatile synthesis between
highly conflicting requirement profiles – in practice, this often means compromises must be
made. In contrast, the current concept cars will occupy a new, consistent position in an
increasingly diversified market. The Audi Aicon long-distance luxury vehicle started things off at
the IAA 2017; the PB18 e-tron is now marking another milestone. Additional vehicle concepts,
such as those for example for urban traffic, are already being developed and will make their
public debut in the coming months.
As part of a premium sharing pool with highly individual models, they will all sharpen the profile
of the Audi brand even further in the future – as custom-tailored products and services for highly
demanding customers who want to combine mobility, emotion and experience in every situation
of their lives. These customers can then decide whether they only want to use the vehicle of their
choice temporarily and exchange it for another when needed, or if they would rather purchase it
permanently, as today.

Source: Audi

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