Mazda 2007 CX-9, Service Highlights

Page: 47 / 614

MECHANICAL [MZI-3.5]
01-10–11
01-10
Hydraulic Pressure Flow Diagram
Component and Function
Operation
•
Engine oil which is suctioned by the oil pump flows to the variable valve timing actuator via the oil control valve
(OCV). The hydraulic pressure applied to the variable valve timing actuator is controlled by the OCV and the
relative phase of the camshaft sprocket and camshaft is changed to optimize the valve timing depending on the
engine operation conditions.
End Of Sie
NG: VARIABLE VALVE TIMING ACTUATOR
Variable valve timing actuator
•
Continuously modifies the phases of the intake camshaft and crankshaft at the forward
end of the intake camshaft using hydraulic pressure from the oil control valve (OCV).
OCV
•
Operated by current from the PCM. Switches the hydraulic oil passages to the variable
valve timing actuator.
PCM
•
Controls the OCV so that optimum valve timing is obtained according to engine
operation conditions.
CYLINDER HEAD
CYLINDER BLOCK
OIL PUMP
OIL
FILTER
OCV
VARIABLE
VALVE TIMING
ACTUATOR
(INNER ENGINE FRONT
COVER)
OIL PAN
CAMSHAFT
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