Mazda 6 - Page 40

B32
VALVE MECHANISM
.
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 fixed and maintained, resulting in fixed valve timing.
.
AME2211N018
1PCM
2 Oil control valve (OCV)
3 Spool valve
4Oil pump
5Camshaft
6 Variable valve timing actuator
7 Rotor
8Housing
9 Oil pan
10 To valve timing retard chamber
11 Valve timing retard chamber
12 From valve timing advance chamber
13 Hydraulic pressure flow
AME2211N019
1PCM
2 Oil control valve (OCV)
3Oil pump
4 To valve timing advance chamber
5 To valve timing retard chamber
6 Hydraulic pressure flow