VARIABLE VALVE TIMING MECHANISM CONSTRUCTION[ZJ, ZY, Z6]

id0110b1120700

•  The variable valve timing mechanism consists of a variable valve timing actuator, OCV, CKP sensor, CMP sensor, and the PCM.
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1
Electric signal
2
Hydraulic pressure
3
CMP sensor
4
Variable valve timing actuator
5
CKP sensor

Hydraulic Pressure Flow Diagram

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1
Engine front cover
2
Camshaft cap
3
Cylinder head cover
4
Variable valve timing actuator
5
Intake camshaft
6
Cylinder head
7
Drain
8
Oil passage in engine front cover
9
Cylinder block
10
Oil filter
11
Oil pump
12
Oil pan
13
Oil

Component and function

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 OCV.
OCV
•  Operated by current (duty signal) from the PCM. Controls the hydraulic oil passages to the variable valve timing actuator.
CKP sensor
•  Inputs engine revolution signal to the PCM.
CMP sensor
•  Inputs cylinder identification signal to the PCM.
PCM
•  Controls the OCV so that optimum valve timing is obtained according to engine operation conditions.