Mazda 6 Training Manual page 40

.
1 PCM
2 Oil control valve (OCV)
3 Spool valve
4 Oil pump
5 Camshaft
6 Variable valve timing actuator
7 Rotor
Maintaining intermediate valve timing
• The spool valve in the oil control valve (OCV) is located near the middle of the valve timing advance and retard
positions. Because of this, hydraulic pressures are maintained in both valve timing advance and retard
chambers of the variable valve timing actuator. At the same time, relative angles of the rotor and the housing
are fied and maintained, resulting in fied valve timing.
.
1 PCM
2 Oil control valve (OCV)
3 Oil pump
B–32
VALVE MECHANISM
8
9
10
11
12
13
4
5
6
Housing
Oil pan
To valve timing retard chamber
Valve timing retard chamber
From valve timing advance chamber
Hydraulic pressure flow
To valve timing advance chamber
To valve timing retard chamber
Hydraulic pressure flow
AME2211N018
AME2211N019