The Boxster S engine has direct fuel injection (DFI). With millisecond precision, fuel is injected directly into the combustion chamber at up to 120 bar pressure via 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.
Depending on throttle input, multiple fuel injection takes place.
DFI improves the internal cooling of the combustion chamber by preparing the mixture directly in the cylinder. The resulting higher compression ratio (12.5:1) helps to deliver more power along with enhanced engine efficiency. It has therefore been possible to reduce CO2 emissions by up to 16% and fuel consumption by up to 15%*. 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.
*Depending on type of transmission.
Fuel consumption* of the Boxster, Boxster S models: Urban: l/100 km -; Extra urban: l/100 km -; Combined: l/100 km -; Emissions: g/km -N/A.