Hyundai Accent: CVVT Oil Control Valve (OCV). Description and Operation

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)] ...

See also:

Automatic climate control system
1. AUTO (automatic control) button 2. OFF button 3. Temperature control knob 4. A/C display 5. Air intake control button 6. Fan speed control knob 7. Air conditioning button 8. Mode selection ...

Removal
1. Disconnect the battery negative cable and wait for at least three minutes before beginning work. 2. Remove the glove box housing. ...

Certification label
The certification label is located on the driver's door sill at the center pillar. This label shows the maximum allowable weight of the fully loaded vehicle. This is called the GVWR (Gross Ve ...