Porsche Cayman User Handbook Manual page 26

Direct fuel injection (DFI).
The engine of the Cayman S
has direct fuel injection (DFI).
With millisecond precision, fuel is
injected at up to 120 bar directly
into the combustion chamber by
34
means of electromagnetically
actuated injection valves.
The spray and cone angles have
been optimised for torque,
power output, fuel consumption
and emissions by enabling a
homogeneous distribution of the
air/fuel mixture and, therefore,
effective combustion. Multiple fuel
injections take place, depending
on the driving style. DFI improves
the internal cooling of the combus-
tion chamber by having the mixture