B21FT Engine (Turbo)

Fig. 1 POSITIVE CRANKCASE VENTILATION SYSTEM (TURBO ENGINE):

The crankcase emission controls prevent crankcase gases from being released into the atmosphere. Instead, the gases are routed to the intake manifold. Crankcase gases are removed from the crankcase by positive crankcase ventilation (PCV). Intake manifold vacuum draws the crankcase gases into the intake air, where they get ignited in the combustion process. Fig. 1.

The PCV hose is located between the crankcase and the turbo-charger inlet pipe. There is a constant vacuum in the inlet pipe when the engine is running, so the crankcase gases get drawn to the inlet pipe and mixed with the intake air.


COMPONENTS:
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Oil Trap And Flame Guard:

OIL TRAP
Separates oil from gases and therefore reduces oil consumption and emissions. An additional benefit is, more effective control of the vacuum in the crankcase. Fig. 10.