2010 PORSCHE BOXSTER S instrument cluster

· 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.

· 44 ·· 45 ·
Under oil pressure, clutch 1
closes and forms a frictional
connection with input shaf t 1.
The torque is now transmit ted
through the first half gearbox
– and then the dif ferential – to
the rear axle. At this stage,
PDK has already preselected
the next gear in the second
half gearbox. Engine torque
is already acting on the other
outer disc carrier and, in
response to a gear change
signal, the overlap shift is initi -
ated, i.e. as clutch 1 opens,

clutch 2 closes. The non-positive
connection with input shaft 2
is
established, and power is
trans
mit ted to the wheels.
The gear which is engaged is
displayed on the instrument
cluster.
Depending on the gearshift
programme, the gear change
is optimised for comfort or for
sport y handling and takes place
in a mat ter of milliseconds.

The advantage over a fully manual
transmission is the considerably
faster rate of acceleration for the
same rate of fuel consumption.
Boxster | Drive
The advantage over a fully auto -
matic transmission
is the per -
ceptible increase in driving
dynamics – with a similar level of
comfort, and a distinct reduction
in fuel consumption.
The com -
pact dimensions of the gearbox
reduce rotational
masses which
means a more direct engine
response, and the system is
more lightweight.
PDK function diagram
This, along with the long-ratio
7th gear, helps to achieve
reduced fuel consumption and
emission figures comparable with
those of a manual gearbox.
With the optional Sport Chrono
Package, PDK is enhanced by
the
‘Launch Control’ and ‘motor-
sport- derived gearshif t strategy’
functions (p. 57). In essence, PDK combines sport
i
-
ness with efficiency and comfort.

What does all this mean for you?
Uninterrupted driving pleasure.
Multi-plate clutch 1
Multi-plate clutch 2
Semi -gearbox 2
(2nd, 4th, 6th gear)
Rear semi-gearbox 1
(1st, 3rd, 5th, 7th, R gear)
Differential
Motor
Rear wheel
Rear wheel
Boxster

· 52 ·· 53 ·
Wheels.
A range of sophisticated wheels
ensures both models deliver
exceptional driving performance,
without compromising on ride
comfort. The Boxster is fit ted with
17-inch wheels in an open five-
spoke design, and the Boxster S
has 18-inch wheels with a
dynamic sport y look. Wheels up
to 19 inches are available for both
models on request. All available
wheels are equipped with anti-
theft protection. A selection of
alternative wheels is featured
on page 108.
Specifically for the cold season,
winter t yres and snow chains
are available from the Porsche
Tequipment accessory range.
Tyre Pressure Monitoring
(TPM).
The optional Tyre Pressure Moni -
toring (TPM) sends warnings to
the on -board computer’s display
screen in the event of low t yre
pressure.

The driver can check the pres -
sure in all four t yres via the instrument cluster. The system
updates quickly and reliably

each time the engine is started, whenever the t yre pressures
are corrected or a wheel is
changed – ensuring a high degree
of comfort and safet y.
Boxster | Chassis
Boxster with 19-inch Carrera Sport wheel and Boxster S with 19-inch Carrera S II wheel
18 - inch Boxster S II wheel
17- inch Boxster III wheel

· 72 ·· 73 ·
Instruments.
Each black circular dial in the
instrument cluster – aluminium-
coloured in the Boxster S –
provides important information
at a glance. In the centre is the
analogue rev counter with digital
speedometer and a customis - able display of key data from the
standard on -board computer.
Additional data, such as average
fuel consumption, fuel range or
the data of the optional TPM can
be shown as desired.
The right-hand dial displays the
outside temperature and shif t
pat tern of the optional Porsche
Doppelkupplung (PDK), as well

as the selected gear. The dial on
the lef t contains the analogue
speedometer with digital trip
meter and total distance display.
The design and legibilit y of the
dials are also enhanced by the
white backlight illumination.
Steering wheels.
The Boxster models are equipped
as standard with a three -spoke
sports steering wheel with full- size
airbag. As an option, you can
specify a three-spoke multifunction
steering wheel with integrated
but tons for the most essential
audio and, where applicable, navi -
gation and telephone functions. The multifunction steering wheel

is available in a choice of smooth
leather, Aluminium Look, carbon
or macassar finish.
In combination with the optional
Porsche Doppelkupplung (PDK),

the three-spoke steering wheel can
be optionally fit ted with gearshift
switches – and is also available as
a multifunction steering wheel if
Boxster | Comfort
required. Also available on request
is the three-spoke sports steering
wheel with gearshif t paddles
(p. 46). For extra comfort in the
cold winter months, there is the
optional steering wheel heating
(available only in conjunction with
seat heating). It is available for
all steering wheels, except the
three-spoke sports steering wheel
with gearshift paddles.
Boxster S interior with three-spoke multifunction steering wheel for PDK and other personalisation options