2011 PORSCHE CAYMAN S engine

3839
Cayman
Integrated dry-sump lubrication.
The purpose of integrated dry-sump
lubrication is to guarantee a
reliable oil supply while reducing
engine temperatures, even in
sportily driven cars. The oil reser -
voir is located inside the engine.
Four oil pumps remove the oil For the engine, these detailed
solutions mean a consistent
supply of oil regardless of gravita
-
tional loads, even in the most
demanding track conditions.
Lightweight construction.
Both Cayman models are
equipped with alloy engines. The
ingenious design, down to the
finest detail, keeps the weight of
the engines low and therefore
reduces fuel consumption. One of
the ways in which this light weight from the cylinder heads directly
into the oil sump. A fif th pump in
the oil sump directly supplies the
lubricating points in the engine.
To reduce power loss and increase
efficiency, an electronically

controlled oil pump supplies the
lubricating points inside the
construction was achieved was
by fully integrating the camshaf t
bearings into the cylinder heads.
engine as and when required.

This means that the oil pump
does not work so hard when there
is less demand for lubrication.
The benefits of this oil supply

system include optimum efficiency
combined with a reduction in
both fuel consumption and
CO
2 em issio ns.
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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, minimises
the engine’s tendency to knock
and ensures comparatively low
emissions, fuel consumption and
noise levels.
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 comparatively low
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
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Cayman | Drive
VarioCam Plus
To improve throt tle response
during the warm -up phase,
VarioCam Plus selects high valve
lif ts with retarded valve timing.
In the middle and low load ranges,
low valve lif ts with advanced
timing reduce fuel consumption
and exhaust emissions. High valve
lif ts generate high torque and
maximum output.Two-stage resonance
intake manifold.
The intake manifold with double-
flow distributor pipe has an
adjustable flap that closes and
opens at defined engine speeds.
As a result of a t wo -stage
resonance ef fect, the air mass
in the intake manifold begins to
oscillate, which in turn generates
a turbocharging ef fect and
optimises induction. These t wo
ef fects combine to produce
higher torque at low engine
speeds, a flat ter torque curve and
increased power output at high
engine speeds, while the acoustic
properties of the system are
second to none. A sound that is
typically Porsche.
VarioCam Plus.
VarioCam Plus combines variable
valve timing with t wo -stage lift
on the inlet side. This results in
smoother running, bet ter fuel
economy and lower exhaust

emissions. As well as greater top-
end power and low- end torque. This two-in-one engine concept
seamlessly adapts in response
to driver input. The result: instant
acceleration and extremely
smooth running.
The variation in intake timing
is steplessly controlled by means
of an electrohydraulic rotary
vane adjuster at the head of the
corresponding camshaf t.

4445
Cayman S exhaust systemCayman S t win tailpipes Cayman S
Cayman tailpipe
circuitry controls and monitors
each cylinder bank separately.
For each exhaust tract, four corre
-
sponding oxygen sensors regulate
the composition of the exhaust
gas and monitor the conversion
of pollutants in the cataly tic con -
verters.
A sports exhaust system – for
a
more resonant sound – is
available as an option for

each of the Cayman models.
Ignition system.
The ignition system is designed
for static high -voltage distribution.
Individual ignition coils on each
of the spark plugs ensure perfect
ignition every time. The individual
ignition coils are controlled
directly by the engine electronics.
Servicing.
It is a good idea to have your
vehicle serviced regularly, but it
makes just as much sense to keep
the time bet ween maintenance
services as long as possible. Why?
Because a Porsche belongs on
the road, and not in the workshop.
The alternator, power-steering
pump and the air- conditioning
compressor are all driven by a
Exhaust system.
The exhaust system – with t win
tailpipes on the Cayman 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
single self-adjusting belt. Hydraulic
valve clearance compensation
makes valve clearance adjustment
unnecessary. The drive chains
on the camshaf ts do not normally
require servicing. With the sole
exception of the spark plugs,
the ignition system is also
maintenance-free.
Put simply, we don’t expect to
see your Porsche too often.
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If you want to get straight to the point,
you don’t take any detours.
Transmission.
Cayman S
This double clutch provides an
alternating, non-positive connection
bet ween the t wo half gearboxes
and the engine by means of t wo
separate input shafts (input shaft
1 is nested inside the hollowed-out
input shaft 2).
The flow of power from the engine
is only ever transmit ted through
one half gearbox and one clutch
at a time, while the next gear is preselected in the second half
gearbox. During a gear change,
therefore, a conventional shif t no
longer takes place. Instead, one
clutch simply opens and the other
closes at the same time. Gear
changes can therefore take place
within milliseconds.
Clutch 1 controls the first half
gearbox, which contains the
odd gears (1, 3, 5, 7) and reverse.
Clutch 2 controls the second,
which contains the even gears
(2, 4, 6).
Porsche Doppelkupplung (PDK).
The optional Porsche Doppel
-
kupplung (PDK), with both manual
gearshif t and an automatic mode,
enables smooth gear changes
with no interruption in the flow of
power. This results in significantly
faster acceleration and lower
fuel consumption, without having
to sacrifice the ease of automatic
transmission. In total, PDK has seven gears
at its disposal. Gears 1 to 6 have
a sports ratio and top speed is
reached in 6th gear. The 7th gear
has a long ratio and helps to
reduce fuel consumption even
f u rt h e r.
PDK is essentially t wo half gear-
boxes in one and thus requires
t wo clutches – designed as a
double wet clutch transmission.
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50
46
2
1
R
7 3
5
51
4
6
2
R1
3
7
5
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
Engine
Rear wheel
Rear wheel
Porsche Doppelkupplung (PDK) PDK 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 Package, PDK is enhanced by
the ‘Launch Control’ and ‘motor
-
sport- 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 relatively
low fuel consumption and

emission figures comparable
with those of a manual gearbox.
With the optional Sport Chrono
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Spor tDesign steering wheel with gearshif t paddles
Sports steering wheel with gearshif t switches Gear selector for PDKGear lever in carbon
A display on the lef t and right
steering wheel spokes tells you
whether the SPORT, SPORT PLUS
and Launch Control functions of
the optional Sport Chrono Package
are activated. Another feature
reminiscent of the world of motor-
spor t is the top centre marking
on the steering wheel rim.
Gear selector for Porsche
Doppelkupplung (PDK).
The gear selector for PDK
impresses not only with its unique
design, but above all with its
superior functionality enabling you
to change gear manually: press wheels for approximately t wo
seconds once the footbrake is
released. The vehicle is therefore
temporarily prevented from rolling
backwards. Brake pressure is
reduced if, within t wo seconds,
sufficient revs have been gener
-
ated by the driver depressing
the accelerator pedal (or, in the
case of manual transmission, the
accelerator pedal is depressed
and the clutch is engaged).
Sports steering wheel.
In conjunction with the optional
Porsche Doppelkupplung (PDK),
the standard sports steering wheel
has t wo ergonomic switches.
One press with the thumb and PDK
shif ts up. One pull with the index
finger and PDK shif ts down. When
combined with one of the optional
Sport Chrono Packages (p. 62),
there is an additional display
above the airbag module. It tells
you whether the SPORT, SPORT
PLUS and Launch Control func -
tions are activated. forwards to shift up, pull back
-
wards to shift down.
Even if the gear selector is set
to automatic mode, you can still
change gear manually using the
switches or gearshif t paddles on
the steering wheel.
Six-speed manual gearbox.
Fit ted as standard in each of the
Cayman models is a six-speed
manual gearbox. The shift throw is
short and precise, the tuning is
sport y – as befits the character of
the Cayman models. The dual-mass
fly wheel minimises engine noise
SportDesign steering wheel.
Visually, this steering wheel is
distinguished by its high-qualit y t win-
spoke design and silver-coloured
galvanised spoke cover. The airbag
module is finished in the same
colour as the steering wheel rim.

This optional steering wheel allows
you to make motorsport-st yle gear
changes. In conjunction with the
optional PDK, the SportDesign
steering wheel features t wo alloy
shift paddles ergonomically located
behind the steering wheel spokes.
Pull the right-hand paddle and the
PDK shifts up. Pull the left-hand
paddle and the PDK shifts down.
and the control cable mechanism
prevents vibrations from being
transmit ted to the gear lever.
Hill-start assist.
Hill-start assist comes as standard
for manual and Porsche Doppel
-
kupplung (PDK) transmissions.
It assists the driver in making a
comfortable, smooth and roll-free
start on an incline.
The system automatically detects
that the vehicle has been braked
to a halt on an incline. Provided
a gear is engaged, the brake
pressure is maintained at all four
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Light weight spring-strut front axle on the Cayman SLight weight spring-strut rear axle on the Cayman S
struts, front and rear. The spring
and damper unit and the anti-roll
bar unit have been tuned for
exceptional driving dynamics
combined with a high level of
driving comfort. For Porsche, that
is not a contradiction. During Driving stabilit y is excellent, even
in the event of considerable load
changes – thanks not least to the
vehicle’s generous track width.
High levels of safet y and a consist
-
ently dynamic driving experience
are the result.Chassis.
The Cayman models follow a
clear line. Their own. Even when it
comes to the chassis. The driver’s
connection to the road is an
essential priorit y at all times, fast lane changes and through
tight corners, this chassis is in its
element. Thanks to the mid- engine
layout and the construction of
the bodyshell, roll and pitch are
practically eliminated. The chassis
responds with absolute precision
along with the delivery of the
engine’s power.
For this reason, the Cayman
models are equipped with
a light weight suspension with
transverse links and spring to acceleration and braking. The
light weight construction keeps
the vehicle gross weight and the
weight of the unsprung masses
low. Virtually all moving axle parts
are made of aluminium.
An expression of agility on the road
that is bound to leave you open-mouthed.
Cayman | Chassis