25-10EMISSION CONTROL SYSTEMS - Crankcase Ventilation Svstem-
CRANKCASE VENTILATION SYS-fUSFAAA,r
TEMA closed-type crankcase ventilation system is
uti-with blow-by gases, and this mixture passes
lized to prevent the blow-by gas from escaping into
through the PCV valve into the intake manifold.
the atmosphere.The PCV valve has a metered orifice through which
This system has a positive crankcase ventilation
the mixture of fresh air and blow-by gases is drawn
valve
(PCV valve) at the rocker cover. This system
into the intake manifold in response to the intake
supplies fresh air to the crankcase through the air
manifold vacuum. The valve capacity is adequate forcleaner. Inside the crankcase, the fresh air is mixed
all normal driving conditions.
From air cleanerPositive crankcaseventilation valve
a Blow-by gas
a Freshair
To intakemanifold
6EM0115
SiringPlunger
7EMOOZi
