2013 PORSCHE BOXSTER S sensor

3233For fuel consumption, CO2 emissions and efficiency class please refer to page 131.
converter to reach normal operating
temperature sooner after a cold start and
a higher maximum torque to be achieved.
DFI improves the internal cooling of the
combustion chamber by having the
mixture prepared directly in the cylinder.
This allows for a higher compression ratio,
which helps to deliver higher power output
at the same time as enhanced engine
efficiency. Injection is regulated by the
electronic engine management system
and emissions are monitored by the stereo
Lambda sensors.
Direct fuel injection (DFI).
Direct fuel injection (DFI) is featured
as standard in both Boxster models.
Multi-hole injectors deliver fuel directly
into the combustion chamber with milli -
second precision. The injection pattern
has been optimised for torque, power
output, fuel consumption and emissions.
With direct injection, the engine manage -
ment system regulates injection timing
individually for each cylinder, as well as
the injection rate for each cylinder bank.
This optimises the combustion process
and therefore fuel economy. Depending
on the engine operating conditions, multi -
ple fuel injections can take place on each
operating cycle. This allows the cataly tic
Resonance intake manifold.
The resonance effect, where the air mass
inside the intake manifold is caused to
oscillate, is used to optimise the induction
process at all engine speeds. The engine
in the Boxster S is additionally equipped
with a switchable resonance valve.
The results are high torque, a flat ter
torque curve and high power output.

The sound produced is characteristically
resonant and deep, as you would expect
of a Boxster.

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37Fo r w ar d t h r u s t |
Engine
For fuel consumption, CO2 emissions and efficiency class please refer to page 131.
1 Boxster tailpipe
2 Boxster S t win tailpipemonitors each cylinder bank separately.
For each exhaust tract, four correspond -
ing oxygen sensors regulate the composi -
tion of the exhaust gas and monitor the
performance of the catalytic converters.
Having separate tracts means that the
exhaust gas can flow more freely. The
resulting reduction in pressure loss has a
positive impact on power output, torque
and the unmistakable engine sound.
Available as an option for the Boxster
models is the sports exhaust system
including sports tailpipe. It produces an
even more resonant Porsche sound.
Our cross-flow cooling system, as used

in motorsport, supplies each engine
cylinder uniformly with coolant, which
protects the valves against thermal
overload and, therefore, premature wear.
This improves combustion and keeps
emissions, fuel consumption and noise
comparatively low.
Exhaust system.
In the Boxster models, each cylinder
bank has its own stainless-steel exhaust
tract. Downstream of their respective
rear silencer, the tracts converge into a
connecting tube and a single ( Boxster)
or t win (
Boxster S) tailpipe. The stereo
Lambda control circuitr y controls and
Thermal management.
The Boxster models feature a new version
of thermal management to reduce friction
losses that arise during the warm-up
phase.
Thanks to the selective control strategy
and on-demand, gradual activation of the
various cooling circuits, the engine and
gearbox warm up to normal operating
temperature more rapidly. The conse -
quent reduction in friction also reduces
fuel consumption and CO
2 em issio ns.
During sporty driving, thermal manage -
ment also acts to reduce temperatures
so that a high level of performance is
maintained.

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4041For fuel consumption, CO2 emissions and efficiency class please refer to page 131.
Fo r w ar d t h r u s t |
Engine
adaptive cruise control will decelerate
your vehicle accordingly – even down to
a halt.
1 Auto start /stop but ton
2 Adaptive cruise control radar sensor
front because it is driving more slowly –
this is detected by the radar sensor. The
system now reduces the speed of your
vehicle by restricting throt tle or by gently
applying the brakes until your chosen
distance from the vehicle in front is main -
tained. If the vehicle ahead slows further,
regulates the speed of your vehicle in line
with the speed of the vehicle in front. A

radar sensor scans the road ahead up to
a distance of 200 m.
Imagine you’ve selected a cruising speed
but have begun to gain on the vehicle in
within the speed limit, it also helps you to
save fuel by maintain
ing a constant speed.
Adaptive cruise control including
Porsche Active Safe (PAS).
Also available as an option is the
enhanced version of cruise control, which
Cruise control.
This optional automatic speed controller
for the 30 to 240 km/ h speed range is
operated using a switch
on a separate
control stalk on the steering
column. The
advantages are clear, not
only can cruise
control be used as a
means of staying
The auto start /stop function can be
deactivated and reactivated using a sepa-
rate but ton on the centre console. The
function may be deactivated automatical-
ly under particular circumstances, for
example in extreme outside tempera
-
tures, when the SPORT but ton is selected
or when there is low bat tery charge.
All audio and commu nication systems
remain switched on. The engine will
restart as soon as you operate the clutch
or, in cars with PDK, release the brake.
This fuel-saving innovation is designed
primarily for use in towns or congested
motorway traffic.
Auto start/stop function.
The auto start/stop function, which is
integrated as standard in the Boxster
models, switches off the engine when
you stop, select neutral and release the
clutch pedal.
In cars with Porsche
Doppelkupplung (PDK), it is simply a
case of applying and holding the brake.

5051
Fo r w ar d t h r u s t |
Chassis
and more comfortable than the standard
chassis. The PASM control unit evaluates
the driving conditions and modifies the

damping force on each of the wheels in
accordance with the selected mode.
Sensors record the body movements that
accompany powerful acceleration, brak
-
ing or uneven road surfaces. This enables
intelligent adaptation of damper stif fness
for the selected mode, optimising contact
bet ween each individual t yre and the road
and reducing pitch.
Porsche Active Suspension
Management (PASM).
Optional PASM, the electronic damping
control system, suits the Boxster models
down to the ground. PASM
actively and
continuously regulates the damping force
for each wheel according to the
road con-
ditions and driving st yle. In addition, the
suspension is lowered by 10 mm.
The driver can select bet ween t wo
dif ferent modes: ‘Normal’ which is a
blend of performance and comfort,
and ‘Sport ’ where the setup is much
firmer. Depending on the mode selected,
therefore, PASM can be both sportier

of the previous model. The independent
suspension features lightweight spring-strut
axles with longitudinal and transverse
links and, at the front, cross members
that have been refined for optimum control.
As a result, each wheel moves precisely
to ensure excellent directional stability
and superior handling in all situations.
What does this mean for the driver? The
sophisticated engineering of the chassis,
combined with the mid-engined layout,
achieves impressive dynamic performance.
Body roll and pitch have been practically
eliminated to offer a level of agilit y that
turns each corner into an incomparable
experience.

Even when you want to make a break
from everyday life, you should still keep
your feet on the ground.
The chassis of the Boxster models are an
excellent match for the powerful engines.
Axle components are made predominantly
of aluminium. This lightweight material
helps to keep the weight of the vehicle and
its unsprung masses low, which reduces
fuel consumption, improves comfort and
increases agilit y.
The wide track is a prominent feature
and to provide additional stability and
enhanced comfort, the wheelbase has been
extended by 60 mm compared with
that
A love of freedom is no reason
to lose self-control.
Chassis.

6061

Porsche Stability Management (PSM).

Porsche Stabilit y Management (PSM) is fit-
ted as standard. This system automatically
maintains stability even at the limits of
dynamic driving performance. Sensors
continuously monitor the speed, yaw
velocit y and lateral acceleration of the
Fo r w ar d t h r u s t |
Chassis
therefore achieved much sooner. Brake
assist detects a panic braking situation
and generates the brake pressure
required for maximum deceleration.
precharging of the brake system and
brake assist. If you suddenly release the
accelerator pedal, PSM automatically
prepares for your next action: the braking
system is precharged so that the brake
pads are already in light contact with the
brake discs. Maximum braking power is

If you prefer an ever sportier drive, PSM
can be switched off. For your safet y,

however, PSM remains set to intervene if
the vehicle is braked and ABS assistance

is required. ABS and ABD remain switched
on at all times. Also included with PSM
are engine drag torque control (EDC),
Under acceleration on wet or low-grip
road surfaces, PSM improves traction –
as well as agilit y and safet y – using the
automatic brake differential (ABD) and
antislip regulation (ASR). Integrated ABS is
designed to minimise braking distances. car. Using this information, PSM is able
to calculate the actual direction of travel
at any given moment. If the car begins
to oversteer or understeer, PSM applies
selective braking on individual wheels in
order to restore stability.

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Fo r w ar d t h r u s t |
Chassis
1 Dynamic gearbox mountsIn conjunction with optional PCM, the
G -Force graphic on the TFT screen in
the right-hand circular instrument enables
you to view the lateral and longitudinal
forces as they act on the vehicle.
Using the SPORT or SPORT PLUS but ton
you can switch the dynamic gearbox
mounts from ‘Normal’ to ‘Sport ’ or

‘Per formance’ mode and intensif y your
driving pleasure. This results in greater traction, perceptibly
more stable handling under load change
conditions and in fast corners and, in
conjunction with the ‘Launch Control’
function for example, extremely fast
acceleration.
Dynamic gearbox mounts minimise this
effect. Steering angle and both longitudi
-
nal and lateral acceleration are constantly
recorded by sensors. The stiffness and
damping performance of the gearbox
mounts adapt to changes in driving st yle
and road surface conditions, which is
achieved by use of a fluid with magnetic
properties.
Put more simply: when you are driving
into a bend, the vehicle will follow your
steering but, at first, the mass of the

drivetrain will not. This means that the
rear of the vehicle will ultimately be
pushed out wards as a result of the drive -
train’s force of inertia.
of the entire drivetrain, especially the
engine.
The gearbox is bolted to the body by t wo
mounts. Like any mass, it obeys the law

of inertia. This means that it will continue
moving in a uniformly straight line unless
some force causes it to change direction. Dynamic gearbox mounts.
Dynamic gearbox mounts are included
as part of the optional Sport Chrono
Package. They are designed to enhance
both performance and comfort.
The electronically controlled system
minimises the oscillations and vibrations

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The wider view |
Safety
Alloyed steel Multi - phase steel Super high -streng th steel Aluminium
1 Engineered body design
2 Airbags and Porsche Side Impact Protection System
(POSIP)
ensuring excellent protection in the event
of a side impact even with the hood open.
POSIP additionally includes steel side
impact protection elements in the doors.System (POSIP). It comprises t wo side
airbags on each side. An integral thorax
airbag is located in the outer side bolster
of each seat, while the door panels each
contain an upwards-inflating head airbag.
Each thorax airbag has a volume of
10 litres and each head airbag 15 litres,
and evaluated far sooner and with

considerably greater accuracy.
Porsche Side Impact Protection
System (POSIP).
Both Boxster models are equipped as stand-
ard with the Porsche Side Impact Protection
only partially inflated, thereby minimising
discomfort to the occupants.
In addition to the central airbag control
unit on the transmission tunnel, a pair of
impact sensors is located near the head -
lights. This allows a crash to be detected
Airbags.
To protect the driver and passenger, the
Boxster models are equipped with full -size
airbags, which are inflated in t wo stages
depending on the severit y and t ype of
accident (e.g. frontal or offset frontal). In
less serious accidents, the airbags are

composite construction of aluminium and
steel. They are fully trimmed to blend in
and provide an excellent level of safet y.
The upper seat belt guides are mounted
on the roll- over bars for easier fastening.Roll-over protection.
Dual roll - over protection creates survival
space in the event of a roll- over or side
impact. The front roll-over protection
element is made from super and ultra
high -strength steels. The rear roll - over
bars located behind the seats are a

76
77For fuel consumption, CO2 emissions and efficiency class please refer to page 131. injection, VarioCam Plus and, in conjunc
-
tion with optional PDK, coasting mode.
On the other hand, newly developed
cataly tic converters provide ef ficient
emission control. While the stereo

Lambda control circuitr y controls and
monitors each cylinder bank separately.
For each exhaust tract, oxygen sensors,
together with the engine electronics
and injectors, regulate the composition
of the exhaust gas, while another
Lambda sensor on each cylinder bank
monitors pollutant conversion in the
respective cataly tic converter.
The goal is to enhance performance –

but, where possible, not at the expense
of the environment.
Exhaust emission control.
Vehicles manufactured by Porsche
demonstrate that even high-performance
sports cars can achieve moderate fuel
consumption and exhaust emission values
in their respective category.
This is achieved, on the one hand, through
the use of fuel - ef ficient technologies such
as auto start /stop, thermal management,
electrical system recuperation, direct fuel
compared with the respective previous
model, even though performance has
been increased in every generation. This
is made possible by an efficient drive
concept (e.g. direct fuel injection (DFI) and
VarioCam Plus), lightweight construction,
optimised aerodynamics and low rolling
resistance.
The environmental management team

at the Porsche Development Centre in
Weissach aims to demonstrate a high
level of environmental responsibility. Here,
technological developments are carried
out with environmental protection in mind.
If we are to continue to enjoy driving
pleasure, we need to look after our

environment. In other words, we need to
take responsibilit y. In an era of intensify -
ing debate about global climate change
and CO
2 emissions, every automotive
manufacturer is asking itself what it
has to offer in terms of environmental
protection. Our answer has long been
the same: a combination of high power
output and high efficiency.
In recent years Porsche has managed to
reduce fuel consumption across all model
ranges by a double - digit percentage
You can live for the moment
and still care about tomorrow.
Environment.