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 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 combustion chamber by having the mixture prepared directly in the cylinder. This allows for a higher compression ratio (12.5:1) which helps to deliver more output along with enhanced engine efficiency.
It has therefore been possible to reduce fuel consumption by up to 15% and CO2 emissions by up to 16%, depending on the type of gearbox. Injection is regulated by the electronic engine management system. The exhaust gas cleaning system ensures that emissions remain well below even the strict limits of the EU5 emission standard, thus helping to protect the environment.