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ENGINE <NON-TURBO>
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Emission Control Svstem
POSITIVE CRANKCASE VENTILATION SYSTEM
N71APOlAA
The positive crankcase ventilation system is a
sys-
tern for preventing the escape of blow-by gases
The positive crankcase ventilation valve is designed
from inside the crankcase into the atmosphere.
to lift the plunger according to the intake manifold
Fresh air is sent from the air cleaner into the
crank-
vacuum so as to regulate the flow of blow-by gas
case through the breather hose to be mixed with
properly.
the blow-by gases inside the crankcase.
In other words, the blow-by gas flow is regulated
The blow-by gas inside the crankcase is drawn into
during low load engine operation to maintain engine
the intake manifold through the positive crankcase
stability, while the flow is increased during high load
ventilation valve.
operation to improve the ventilation performance.
Positive crankcase
ventilation valve
AFU0003
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