2010 PORSCHE BOXSTER S sensor

· 34 ·· 35 ·
Boxster
Boxster
Boxster
Engine management system
with electronic throttle.
The electronic engine manage -
ment system ensures optimum
engine performance under all
operating conditions. It regulates
all engine-related functions and
assemblies (see diagram). The
results: optimum performance
and torque with reduced fuel con -
sumption and emissions.
Another important function of the
system is cylinder-specific knock
control. Since the six cylinders
never all work under precisely
the same conditions, they are
monitored individually by the
knock control. If necessary, the
ignition point is shifted individu -
ally to protect the cylinders and
pistons at high engine speeds
and loads. The on-board diagnos -
tics, which are compliant with
European standards, ensure
timely detection of any faults and
defects that may occur in the
exhaust and fuel system in good
time and notify the driver
immediately. This also prevents
increased pollutant emissions
and
unnecessary fuel consumption.
Two-stage resonance intake
manifold.
The intake manifold with dual-flow
distributor pipe has an adjustment
valve which closes and opens at
set engine speeds. A t wo -stage
tuning effect creates oscillation
of the air mass in the intake

system, which in turn generates
a turbocharging effect and opti -
mises induction.
These t wo effects combine to
produce higher torque at low
engine speeds, a flat ter torque
curve, and increased power
output at high engine speeds.
The acoustic properties of the
system are second to none,
producing the characteristic
Boxster sound.
Boxster | Drive
Input data Used to regulate/control
Engine management system
ME 7.8/Boxster – SDI 3.1/Boxster S
Engine load
Lambda sensor signals
Engine speed (from crankshaft)
Inlet camshaft phase angle
Knock sensor signals
Vehicle speed
Pressures
– Engine oil
– Fuel
– Ambient air
Air-conditioning settings
Accelerator pedal
Temperatures
– Coolant
– Intake air
– Air in engine compartment
– Engine oil
– Ambient air
Ignition
Heating of lambda sensors
Fuel pump (Boxster)/fuel pumps
controlled on - demand (Boxster S)
Camshaft position
Fuel-tank venting
Engine fan
Starter
Continuously variable oil pump
Fuel pressure (Boxster S)
Throttle valve
Throt tle -valve angle
Idling via throttle valve
and ignition
Manifold injection (Boxster)/
direct fuel injection (Boxster S)
Valve lift switchover
(VarioCam Plus)
Secondary-air injection (Boxster)
CAN inter face with driving dynamics control, transmission control, immobiliser, instrument cluster, climate control,
SPORT button, SPORT PLUS button, sports exhaust system button, diagnostics, etc.

· 38 ·· 39 ·
Exhaust system.
The exhaust system – with t win
tailpipes on the Boxster S – is
made of stainless steel. Until it
converges in the connecting tube,
the exhaust gas is channelled
through t wo separate tracts and,
thanks to separate exhaust gas cleaning systems, the exhaust
gas can flow more freely – for
increased power and torque.
The stereo lambda control

circuitry controls and monitors
each cylinder bank separately.
For each exhaust tract, four
corresponding oxygen sensors regulate the composition of the
exhaust gas and monitor the con
-
version of pollutants in the cata -
ly tic converters.
A sports exhaust system – for a
more resonant sound – is avail -
able as an option for each of the
Boxster models.
Boxster | Drive
Servicing.
Every Porsche is designed with
durabilit y in mind. On the Boxster
models, this is reflected in the
lengthy service intervals. The alternator, power steering
pump and the air- conditioning
compressor are all driven by a
single self-adjusting belt. The
drive chains on the camshafts
and intermediate shaf ts do not
normally require servicing. With the sole exception of the
spark plugs, the ignition system
is also maintenance-free.
So your Boxster remains where
it belongs for as long as possible:
on the road.
Boxster S exhaust system
Boxster S twin tailpipe
Boxster tailpipe

· 54 ·· 55 ·
Boxster | Chassis
Compression in ‘Normal’ mode –
working piston and bypass, sporty-
comfortable tuning Rebound in ‘Spor t ’ mode –
working piston only, sporty-
comfortable tuning Rebound in ‘Spor t ’ mode –
working piston only, sporty-
hard tuning
Compression in ‘Normal’ mode –

working piston and bypass, sporty-
hard tuning
Porsche Active Suspension
Management (PASM).
The optional PASM is an elec -
tronic damping control system.
On the Boxster models, the
suspension has been tuned to
match the high power of the
engine. PASM actively and con -
tinuously regulates the damping
force for each wheel according
to the road conditions 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. 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 monitor the movement
of the vehicle body, for example,
under heav y acceleration and
braking or on uneven roads. The
control unit tunes the dampers

to the optimum hardness for the
selected mode to reduce roll and
pitch still further and to increase
contact bet ween each individual
wheel and the road.
In ‘Sport ’ mode, the suspension
is set to a harder damper rating.
On uneven roads, PASM imme-
diately switches to a softer
rating within the ‘Sport ’ setup
range, thereby improving con-
tact bet ween the wheels and the
road. When the road surface
improves, PASM automatically
reverts to the original, harder
rating.
If ‘Normal’ mode is selected and
the driver’s st yle becomes more
assertive, PASM automatically
switches to a harder rating within
the ‘Normal’ setup range.
Damping becomes harder, and
driving stabilit y and road safet y
are increased.
Mechanically locking rear
differential.
Are you a fan of sport y driving?
In your spare time, do you
enjoy the occasional outing on
the racetrack? Then you
shouldn’t do without the optional
mechanically locking rear differ -
ential available in conjunction
with 18-inch or 19-inch wheels.
It further enhances the traction
of the driven rear wheels on
uneven roads and when acceler -
ating out of tight bends. Road
holding at the limits of perform -
ance is even more impressive.
The car holds its course bet ter
and so PSM intervenes less often.
In other words, sheer driving
pleasure and faster lap times.

· 62 ·· 63 ·
Porsche Ceramic Composite
Brake (PCCB).
On request, we can equip your
Boxster S with a brake system
that has already had to cope
with the harshest requirements
of motorsport: the Porsche
Ceramic Composite Brake (PCCB).

The ceramic brake discs have
a diameter of 350 mm front and
rear – for extremely powerful
braking. The brake discs are
formed from a specially treated
carbon -fibre compound that is
silicated in a high-vacuum process
at approximately 1,700 ˚C. Not
only are the resulting discs much
harder than standard discs, they are more resistant to heat.
The low thermal expansion of

the brake discs prevents defor -
mation under heav y braking.
Furthermore, the ceramic brake
discs are totally resistant to
corrosion and offer more favour -
able noise-damping properties.

Six-piston aluminium monobloc
fixed calipers on the front axle
and four-piston units at the rear
provide a high and constant
brake pressure. The pedal
response is fast and precise with
only moderate input required.
All the necessary ingredients
are there for a short braking
distance, even in the toughest
conditions. Moreover, safet y
under braking at high speeds is
increased thanks to the excel-
lent fade resistance of PCCB.
The key advantage of PCCB
is that the brake discs are
approximately 50 % lighter than
standard discs of similar design
and size. A factor that helps
to reduce unsprung and rotating
masses on the vehicle. The
consequence of this is bet ter
road holding and increased
comfort, particularly on uneven
roads, as well as greater agilit y
and improved handling.
Please note that circuit racing,
trackday use and other forms of
performance driving can signifi -
cantly reduce the service life of
even the most durable brake
pads and discs. We recommend
that all brake components be
professionally inspected and
replaced where necessary after
every track event.
Porsche Stability Management
(PSM).
PSM, which comes as standard,
is an automatic control system
that stabilises the vehicle at the
limits of dynamic driving per-
formance. Sensors continuously
monitor driving direction, speed,
yaw velocit y and lateral accel -
eration. Using this information,
PSM computes the actual direc -
tion of motion. If this direction
deviates from the desired course,
PSM initiates braking inter-
ventions targeted at individual
wheels in order to stabilise the
vehicle.

Under acceleration on wet or
low-grip road surfaces, PSM
improves traction using the ABD
(automatic brake differential)
and ASR (anti-slip regulation)
functions, giving an agile
response. When ‘Sport ’ mode is
selected on the optional Sport
Chrono Packages (p. 56), the
PSM intervention threshold is
raised to enable greater driver
involvement – particularly at
speeds of up to approximately

70 km/ h (45 mph). The integral
ABS can further reduce the
braking distance.
Boxster S Boxster SBoxster S
Boxster | Safet y

· 64 ·· 65 ·
Boxster | Safet y
Dynamic cornering light Night-time illumination (front)Night-time illumination (rear)
For an even sportier drive, PSM
can be deactivated. However,
it is automatically reactivated for
your safet y if either of the front
wheels (in ‘Sport ’ mode, both of
the front wheels) requires ABS
assistance. ABD remains perma -
nently active.
PSM includes t wo additional func -
tions: precharging of the brake
system, and brake assist. If you
suddenly release the accelerator
pedal, PSM automatically readies
the braking system. With the
braking system having been
precharged, the brake pads are
already in light contact with the
brake discs. Maximum braking
power is therefore achieved
much sooner. When sudden brak -
ing is detected, the brake assist
function applies maximum brake
pressure to all four wheels.
Lights.
The Boxster models are all fit ted
with halogen headlights with
LED position lights integrated
separately into the front light unit
with integral fog lights above the
outer air intakes.
LED technology is also used in
the taillight unit to provide bet ter
illumination and respond more
quickly to driver input. Further
benefits are that LED bulbs are
energy saving and have a longer
life than conventional bulbs.

The design is unmistakable, both
day and night.
Bi-Xenon headlights with
dynamic cornering lights and
LED daytime running lights.
Available as an option for both
Boxster models are Bi-Xenon
headlights which include dynamic
cornering lights and LED day time
running lights.
Bi-Xenon headlights are brighter
than halogen headlights so that
they of fer improved visibilit y and
they illuminate the road more evenly. In fact, they are so effec
-
tive that separate fog lights are
no longer necessary. A headlight
cleaning system is built-in.
Dynamic cornering lights of fer
particularly effective illumination
of the road ahead, especially
through bends. Sensors continu -
ously monitor the speed, lateral
acceleration and steering lock
and, from these variables, calcu -
late the course of the bend.
This determines the angle
of the dynamic cornering lights,
with the lights able to swivel
into the corners up to a limit of
15 degrees, even with main
beam switched on.

· 76 ·· 77 ·
Air conditioning.
As standard, both Boxster models
come with a quiet, efficient
air- conditioning system. Optional
climate control, with solar and
temperature sensors, ensures
even more consistent control
over the interior temperature.
Cruise control.
This optional automatic speed
controller for the 30 to 240 km/ h
(19–149 mph) range is operated
using a switch on a separate con -
trol stalk on the steering column.
Storage compartments.
The Boxster’s cleverly designed
storage compartments of fer
plent y of space, such as those in
the front centre console or the lockable glove compartment
(includes CD storage on vehicles
with optional sound system).

The storage box on the rear bulk -
head of fers additional loadspace
(except on vehicles with optional
BOSE® Surround Sound System)
along with space in the rear
centre console. Other practical
features include storage com -
partments in the doors, coat
hooks on the back of each seat
and t wo retractable cup holders
above the glove compartment.
Boxster | Comfort
‘Welcome Home’ lighting.
When the vehicle is opened or
locked using the key remote, the
standard automatic locator light -
ing switches on automatically.
This is particularly convenient at
night. In conjunction with the
optional PCM (p. 83) and Sport
Chrono Package Plus (p. 57), the
delayed lighting switch - of f period
can be adjusted as desired.
HomeLink® (programmable
garage door opener).
The optional programmable
garage door opener is integrated
into the overhead console and
remotely controls up to three
different garage doors, gates,
home lighting and/or alarm
systems.
Windscreen wipers.
The windscreen wipers with
an adjustable intermit tent wipe
speed are aerodynamic and
inconspicuous. The windscreen
washer system has t wo heated
and filtered nozzles. An inte -
grated rain sensor is available
as an option (in conjunction
with auto -dimming mirrors).
Climate control Cruise controlCup holder

· 78 ·· 79 ·
Water-repellent side windows.
The surfaces of the side windows
are treated with a water-repellent
coating so that not only water but
also dirt runs away more easily,
thereby providing optimum visibil-
it y even in poor weather.
ParkAssist.
As soon as reverse gear is
engaged, the optional Park Assist
is automatically enabled. If you
move too close to an obstacle, a
warning signal begins to sound,
becoming faster until the car stops.
The sensors of the optional
Park Assist are neatly concealed in
the rear bumper.
Anti-theft protection.
The Boxster models are equipped
with an immobiliser with in-
key transponder. In addition, the
Boxster S has an alarm system
with contact-sensitive exterior pro -
tection as standard. On request
,
radar-based interior surveillance
is available which protects
the interior of the vehicle when
the hood is closed. For the
Boxster, the alarm system and
radar interior surveillance are
both available as options.
Boxster | Comfort
Vehicle tracking system.
In conjunction with the alarm
system, this optional preparation
enables future installation of a
vehicle tracking system available
from Porsche Tequipment. It
makes it possible to locate a
stolen vehicle across most of the
countries of Europe. The package
includes a special wiring loom
and a higher-capacit y bat tery.
A tilt sensor is included.
Two luggage compartments.
Two carpet-lined luggage compart -
ments are available. The front
loadspace capacit y is 150 litres,
with 130 litres at the rear –
even when the hood is lowered.
At the front there's enough room
for the large trolley from the
Porsche Travel System, while
the rear can accommodate the
Porsche golf bag. The luggage
compartment covers are made
of light weight aluminium.
A service hatch located in the
rear luggage compartment

enables easy refilling of coolant
and engine oil.
Front luggage compartment Rear luggage compartment Luggage compartments

· 92 ·· 93 ·
In an era of intensif ying debate
about CO
2 emissions, every auto -
motive manufacturer is asking
itself what it has to of fer in terms
of environmental protection. Our
answer has long been the same:
maximum efficiency.
Over the last 15 years, Porsche
has been reducing the CO
2 emis -
sions of its vehicles annually by
an average of 1.7 %. In relation to
power output (g / km per hp), Porsche is already among those
manufacturers achieving the

lowest CO
2 emissions. This has
been achieved through the new
efficient drive concept (DFI), light-
weight construction, optimum
aerodynamics and low rolling
resistance.
This high level of environmental
responsibilit y is clearly demon -
st rated by our approach to env iron -
mental management at the
Our contribution to a cleaner environment:
pure engineering.
Porsche development centre in
Weissach. Here, all technological
developments are carried out
with environmental protection in
mind. The goal? Pure perform -
ance – but not at the expense of
the environment. A goal achieved
by the Boxster models.
Exhaust emission control.
Both engines comply with strin -
gent emission standards, including
Euro 5 in Europe and LEV II / ULEV
in the USA. Vehicles manufactured

by Porsche demonstrate that
even high-performance sportscars
can achieve very low emission
values in their respective category.
In short, the Boxster is not only
extremely sport y, it is also very
clean.
This is achieved by means of a
t wo -stage cascade-t ype cataly tic
converter which comprises t wo
monolith substrates on each of the
t win exhaust tracts. These spe -
cially coated substrates contain
ultra-fine honeycomb channels
in which pollutants are converted
as exhaust gas passes through.
The stereo lambda control cir -
cuitry controls and monitors each
cylinder bank separately, while
another lambda sensor on each
cylinder bank monitors pollutant
conversion in the respective cata -
ly tic converter (p. 38).*
Boxster | Environment
Fuel economy and recycling.
At Porsche, a fundamental aspect
of design is intelligent light weight
construction. For both economical

and ecological reasons. This
forms the basis for low fuel con -
sumption values in conjunction
with out-standing performance.
It is economical thanks to the
high proportion of aluminium cast
alloys, plastics and super high-
strength sheet steel used. This is
substantially lighter and more
stable than conventional steel.

Boxster S and Boxster
* Not in markets with leaded fuel.