Function

Intake system





Each cylinder has an intake manifold which comes from a plenum chamber. The injectors are on the lower aluminum intake manifold close to the intake valves. This is so that the fuel mixes as well as possible with the turbulent air. The position of the injectors is optimized to minimize wetting the cylinder walls and therefore emissions. There are ducts in the lower intake manifold for the crankcase gases so that they can reach the combustion chamber.

The air comes in via the air intake on the front member. In the air intake pipe there is a rail which divides the pipe to minimize drops in pressure. The air then flows on to the air cleaner (ACL) housing. Here there is also a snow valve. This valve opens if the air cleaner (ACL) housing and air intake are blocked by snow. This lets the air flow through and also uses cooling flanges to cool the engine control module (ECM)

The air then flows through a funnel reaching the mass air flow (MAF) sensor. The mass air flow (MAF) sensor controls the mass air flow to the engine. The air then flows through a fresh air intake over the engine. The air then passes the turbocharger (TC) and charge air cooler before reaching the electronic throttle body (TB) and being released into the intake manifold. The EVAP valve recirculates the fuel/air mixtures for further combustion. The EVAP valve is by the throttle body (TB).