Kia Sportage: Engine Control System / CVVT Oil Control Valve (OCV) Description and operation
Continuous Variable Valve Timing (CVVT) system advances or retards the valve
timing of the exhaust valve in accordance with the ECM control signal which
is calculated by the engine speed and load.
By controlling CVVT, the valve over-lap or under-lap occurs, which makes better
fuel economy and reduces exhaust gases (NOx, HC) and improves engine performance
through reduction of pumping loss, internal EGR effect, improvement of combustion
stability, improvement of volumetric efficiency, and increase of expansion work.
This system consist of
-the CVVT Oil Control Valve (OCV) which supplies the engine oil to the cam phaser
or cuts the engine oil from the cam phaser in accordance with the ECM PWM (Pulse
With Modulation) control signal,
-and the Cam Phaser which varies the cam phase by using the hydraulic force
of the engine oil.
The engine oil getting out of the CVVT oil control valve varies the cam phase
in the direction (Intake Advance/Exhaust Retard) or opposite direction (Intake
Retard/Exhaust Advance) of the engine rotation by rotating the rotor connected
with the camshaft inside the cam phaser.
Specification
Item
Specification
Coil Resistance (Ω)
6.9 - 7.9 [20°C(68°F)]
...
Circuit Diagram
Terminal Information
Terminal Illustration
Terminal Function
No.
Function
Connected ...
Other information:
Release Residual Pressure
in Fuel Line
Whenever the high pressure fuel fuse, fuel pipe, delivery pipe, or injector
is removed immediately after shutting off the engine, an injury may
be caused by th ...
Removal
[2WD]
1.
Remove wheel nuts, wheel and tire (A) from hub.
Tightening torque:
107.9 - 127.5 N·m (11.0 - 13.0 kgf·m, 79.6 - 94.0 lb·ft)
...