Hyundai Accent: CVVT Oil Control Valve
(OCV). Description and Operation
Hyundai Accent RB (2010-2018) Service Manual / Engine Control/Fuel System / Engine Control System / 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.
Installation
•
Install the component with the specified
torques.
•
...
CVVT Oil Control Valve
(OCV). Specifications
Specification
Item
Specification
Coil Resistance (Ω)
6.9 ~ 7.9 [20°C(68°F)]
...
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Description and Operation
Warning Lamp Activation
Warning Lamp Behavior after Ignition
On
As soon as the operating voltage is applied to the SRSCM ignition input,
the SRSCM activates the warning lamp fo ...
Removal Of Parts
First find the cause of the problem and then determine whether
removal or disassembly before starting the job.
...
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