Emission Control Systems: Description and Operation

The emission control systems are used to reduce harmful gases (CO, HC, and NOx) in the combustion engine exhaust. The emission control system has the following three major systems:

Crankcase Emission Control System.
The crankcase emission control system is a closed-type crankcase ventilation, used to prevent blow-by gases from escaping into the atmosphere. The blow-by gases in the crankcase are routed to the intake manifold for combustion.

Evaporative Control System.
The evaporative control system prevents the escape of fuel vapors from the fuel tank into the atmosphere. It consists of various components, which collect and lead the fuel vapors to the intake manifold for combustion.

Exhaust Emission Control System.
The exhaust emission control system consists of a electronic engine managment system with oxygen sensor, three-way catalytic converter.

Porsche uses the following emission control systems on this vehicle:

EVAPORATIVE CONTROL SYSTEM (ECS)
OXYGEN SENSOR (OXY)
POSITIVE CRANKCASE VENTILATION (PCV)
THREE-WAY CATALYTIC CONVERTER (TWC)