Positive Crankcase Ventilation (Pcv) System Outline [Lf]; Feature; Positive Crankcase Ventilation (Pcv) System Structure [Lf]; Positive Crankcase Ventilation (Pcv) System Operation [Lf] - Mazda 2006 MX-5 Service Highlights

POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM OUTLINE [LF]

Feature

• A closed type PCV system has been adopted.
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POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM STRUCTURE [LF]

• Consists of a PCV valve and ventilation hose.
• The PCV valve is installed on the oil separator.
OIL SEPARATOR
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POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM OPERATION [LF]

• Blowby gas (unburnt gas), including CO and HC exhausted from the crankcase, is forced into the intake air
system and burned in the combustion chamber to prevent its atmospheric release.
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POSITIVE CRANKCASE VENTILATION (PCV) VALVE FUNCTION [LF]

• Adjusts the amount of blowby gas conducted to the intake air system according to the intake manifold vacuum.
• Regulates the air (including blowby gas) passing from the cylinder head cover to the intake manifold during low
load (when vacuum in the intake manifold is high) to ensure an optimum air/fuel ratio.
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POSITIVE CRANKCASE VENTILATION (PCV) VALVE CONSTRUCTION/OPERATION [LF]

• Consists of a spring and valves.
• The PCV valve ensures the passage of blowby
gas by opening the valve according to the intake
manifold vacuum, and adjusts the amount of gas
by spring force.
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01–16–6
EMISSION SYSTEM
VENTILATION HOSE
PCV VALVE
PCV VALVE
FROM OIL SEPARATOR
E5U011600040N01
E5U011600040N02
E5U116ZS5853
E5U011600040N03
E5U011613890N01
E5U011613890N02
SPRING
TO DYNAMIC
CHAMBER
INTERNAL VALVE
E5U116ZW5043