<4B12> <6B31> A blow-by gas reduction device prevents blow-by gas from being expelled into the atmosphere
and is of closed type. A positive crankcase ventilation (PCV) valve is provided in the ventilation
hose from the rocker cover to the intake manifold plenum. During low load driving, clean air
is supplied to the crankcase by the air intake hose via the breather hose and rocker cover,
and it mixes with the blow-by gas in the crankcase. The blow-by gas in the crankcase is induced
to the intake manifold plenum through the rocker cover and PCV valve. During high load driving,
blow-by gas in the crankcase is induced to the intake manifold plenum through the rocker cover
and PCV valve and at the same time also via the air intake hose and throttle body due to negative pressure
in the air cleaner.
POSITIVE CRANKCASE VENTILATION (PCV) VALVE
PCV valve lifts the plunger according to negative pressure at the intake manifold plenum
to create appropriate ventilation for the crankcase.
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