Hyundai Accent: CVVT Oil Control Valve
(OCV). Description and Operation
Description
Continuous Variable Valve Timing (CVVT) system advances or
retards the valve timing of the intake and 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,
- the CVVT Oil Temperature Sensor (OTS) which measures the
engine oil temperature,
-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.
•
Install the component with the specified
torques.
•
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Specification
Item
Specification
Coil Resistance (Ω)
6.9 ~ 7.9 [20°C(68°F)]
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See also:
Explanation of scheduled maintenance items
Engine oil and filter
The engine oil and filter should be changed at the intervals specified in the
maintenance schedule. If the car is being driven in severe conditions, more frequent
oil and fi ...
Blade inspection
NOTICE
Commercial hot waxes applied by automatic car washes have been known to make
the windshield difficult to clean.
Contamination of either the windshield or the wiper blades with foreign ma ...
Adjustment
Hood Adjustment
1.
After loosening the hinge (A) mounting bolt, adjust the hood (B)
by moving it up or down, or right or left.
2.
Adju ...