Hyundai Sonata: Engine Control System / CVVT Oil Control Valve (OCV) Description and Operation

Hyundai Sonata LF 2014-2019 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.

Purge Control Solenoid Valve (PCSV) Repair procedures

Inspection 1. Turn the ignition switch OFF. 2. Disconnect the PCSV connector. 3. Measure resistance between the PCSV terminals 1 and 2. 4. Check that the resistance is within the speci ...

CVVT Oil Control Valve (OCV) Specifications

Specification ItemSpecificationCoil Resistance (?)6.9 ~ 7.9 [20°C(68°F)] ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Rear Disc Brake Repair procedures
Removal [General Type] 1. Raise the vehicle, and make sure it is securely supported. 2. Remove the wheel cap(A). Be careful not to damage to the wheel cap(A) when removing the it. 3. Remove the front wheel and tire (A) from front hub. Tightening torque: 88. ...

Hyundai Sonata LF 2014-2019 Owners Manual: Check Tire Pressure
You can check the tire pressure in the Information Mode on the cluster. Tire pressure is displayed after a few minutes of driving after initial engine start up. If tire pressure is not displayed when the vehicle is stopped, "Drive to display" message will appear. After driving, check the ti ...