2010 PORSCHE CAYMAN S fuel pressure

Input dataRegulation/control of
Electronic engine management
ME 7.8/Cayman – SDI 3.1/ Cayman S
Engine load
Lambda sensor signals
Engine speed (from crankshaft)
Inlet camshaft phase angle
Knock sensor signals
Vehicle speed
Air-conditioning settings
Accelerator pedal
Temperatures
– Coolant
– Intake air
– Air in engine compartment
– Engine oil
– Ambient air
Pressures
– Engine oil
– Fuel
– Ambient air
Ignition
Manifold injection (Cayman)/
direct fuel injection (Cayman S)
Heating of Lambda sensors
Fuel pump (Cayman)/
fuel pumps controlled on demand
(Cayman S)
Fuel-tank venting
CAN interface with driving dynamics control, transmission control, immobiliser, instrument cluster, climate control,
SPORT button, SPORT PLUS button, sports exhaust system button, diagnostics, etc.
Valve lift switchover
(VarioCam Plus)
Secondary-air injection (Cayman)
Starter
Throttle-valve angle
Idling via throttle valve
and ignition
Fuel pressure (Cayman S)
Throttle valve
Camshaft position
Engine fan
Continuously variable oil pump
Cayman
same conditions, they are
monitored individually by the
knock control. The ignition point
is shifted individually, as and
when necessary, to protect the
cylinders and pistons at high
engine speeds. The on -board
diagnostics, which are compliant
with European standards, ensure
timely detection of any faults
and defects that may occur in the
exhaust and fuel systems and
notif y the driver immediately. This
also prevents increased pollutant
emissions and unnecessary fuel
consumption.Engine cooling system.
Our cross-flow cooling system,
as used in motorsport, supplies
each engine cylinder uniformly
with coolant. Valves are thus
protected against overload and
premature wear, which minimises
the engine’s tendency to knock
and optimises emissions and fuel
consumption.
Engine management system
with E-Gas.
The electronic engine management
system ensures optimum engine
performance at all times. It regu -
lates all engine-related functions
and assemblies (see diagram).
The results: optimum performance
and torque with reduced fuel
consumption and emissions.
Another important function of the
system is cylinder-specific knock
control. Since the six cylinders
never all work under exactly the
Cayman | Drive
4041

Multi - plate clutch 1
Multi - plate clutch 2
Semi -gearbox 2
(2nd, 4th, 6th gear)
Semi -gearbox 1
(1st, 3rd, 5th, 7th, R gear)
Differential



P DK function diagram
is established, and power is
transmit ted to the wheels.
The gear which is engaged is
displayed on the instrument
cluster. Depending on the
gearshif t programme, the gear
change is optimised for comfort
or for sport y handling and takes
place in a mat ter of milliseconds.
The advantages over a fully
manual transmission are very PDK is enhanced by the ‘Launch
Control’ and ‘motorsport- derived
gearshift strategy’ functions (p. 62).
In essence, PDK combines
sportiness with ef ficiency and
comfort. What does all this
mean for you? Exactly what you
would expect: uninterrupted
driving pleasure.
Porsche Doppelkupplung (PDK)
in detail.
The crankshaf t transmits engine
torque to the dual-mass fly wheel
which is then channelled through
the clutch housing and onto the
multi-plate clutches, or to be more
precise, the outer disc carrier.
Under oil pressure, clutch 1 closes
and forms a frictional connection rapid gearshif ts with no
interruption in the flow of power,
which result in a considerably
faster rate of acceleration for the
same rate of fuel consumption.
The advantage over a fully
automatic transmission is the

perceptible increase in driving
dynamics – with a similar level of
comfort, and a distinct reduction
in fuel consumption.
with input shaft 1. The torque is
now transmit ted through the
dif ferential to the rear axle.
At this stage, PDK has already
preselected the next gear.
Engine torque is already acting
on the other outer disc carrier
and, in response to a gear change
signal, the overlap shift is

initiated, i.e. as clutch 1 opens,
clutch 2 closes. The non-positive
connection with input shaf t 2 The compact dimensions of the
gearbox reduce rotational masses
which means that the engine
response is more direct and the
system is more light weight.
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,
Cayman | Drive
50
46
2
1
R
7 3
5
51
4
6
2
R1
3
7
5

Cayman S dashboard with optional equipment, including PCM, cordless handset, Tyre Pressure Monitoring (TPM), Sport Chrono Package Plus and PDK
Doppel
kupplung (PDK), as well as
the selected gear. The dial on the
left contains the analogue speed -
ometer with digital trip meter and
total distance display. The design
and legibilit y of the dials are also
enhanced by the white backlight
illumination. of this steering wheel is of fered

as an option. Also available as an
option is the three-spoke sports
steering wheel with gearshift
paddles (p. 52). For extra comfort
on those cold days, steering
wheel heating is also available

on
request for all steering wheels
(steering wheel heating available
only in conjunction with heated
seats).
Instruments.
Each black circular dial in the
instrument cluster – aluminium-
coloured in the Cayman S model
– provides important information
at a glance. In the centre is the
analogue rev counter with digital
speedometer and a customisable
display of key data from the
Steering wheels.
The Cayman models feature as
standard a three-spoke sports
steering wheel with full-size airbag.
The steering wheel is adjustable
for height and reach and the
rim is in smooth -finish leather.
As an option, you can specif y a
three-spoke multifunction steering
wheel in leather with integrated
but tons for the most essential
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 a
range of information, including
the outside temperature and shif t
pat tern of the optional Porsche audio and, where applicable,

navigation and telephone functions.
Alternatively, the multifunction
steering wheel is available in
smooth -finish leather, Aluminium
Look, carbon or macassar wood.
Fit ted as standard in conjunction
with Porsche Doppelkupplung
(PDK) is the three-spoke sports
steering wheel with gearshift
switches. A multifunction version
Cayman | Comfort
8081

Index
Te r m Pa g e
A
Active safet y 66
Airbags 74
Air- conditioning system 83
Anti-theft protection 75
Audio interface, universal 95
B
BOSE® Surround Sound
System 96
Braking system 69
C
CD autochanger 95
CDR-30 audio system 90
Chassis 56
Child seats 75
Colours 108
Cornering lights, dynamic 67
Cruise control 83
D
Direct fuel injection 34
Dry-sump lubrication,
integrated 38
E
Engine cooling 40
Engine management 40
Engine, flat-six 32
Environment 98
Exclusive 127
Exhaust emission control 100
Exhaust system 44
F
Factory collection 128
Fuel 103
Fuel system 103
G
Garage door opener
(HomeLink
®) 84
H
Headlight cleaning system 67
Headlights, Bi-Xenon 67
Heated seats 83
Heated steering wheel 81
Hill-start assist 53
HomeLink
® (programmable
garage door opener) 84
I
Ignition 44
Instruments 80
L
LED day time running lights 67
Logbook, electronic 94
Luggage compartment, front 86
Luggage space, rear 86
M
Maintenance 103
Maintenance requirements 45
Manual gearbox 53
Materials 103
N
Navigation module 92
Noise 103
O
Oil supply 38
On -board computer
integrated 80
P
ParkAssist 85
Passive safety 73
Personalisation options 106
Porsche Active Suspension
Management (PASM) 60
Porsche Ceramic Composite
Brake (PCCB) 70
Porsche Communication
Management (PCM) 92
Porsche Doppelkupplung
(PDK) 48
Porsche Side Impact Protection
(POSIP) 74
Porsche Stability Management
(PSM) 72
R
Rear differential lock 60
Rear wiper 85
Recycling 103
Resonance intake manifold 43
Roof transport system 89
S
Safet y, active 66
Safet y, passive 73
Seat ventilation 83
Seats, comfort 82
Service 130
Side windows,
water-repellent 84
Sound Package Plus 95
Sport Chrono Package 62
Sport Chrono Package Plus 63
Sports bucket seats 83
Sports exhaust system 44
Sports seats 82
Sports seats, adaptive 82
Standard seats 82
Steering 58
Steering wheels 81
Storage compartments 88
T
Technical data 134
Telephone 94
Telephone preparation 95
Transport concept 86
TV tuner 94
Tyre Pressure Monitoring
(TPM) 59
V
VarioCam Plus 43
Vehicle tracking system 75
Voice control system 94
W
‘Welcome Home’ lighting 84
Wheels 59
Windscreen wipers 84
Index
136 137