Porsche Cayman User Handbook Manual page 32

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.
40
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
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
notify the driver immediately. This
also prevents increased pollutant
emissions and unnecessary fuel
consumption.
Cayman