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

Hyundai Elantra AD (2016-2020) 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 regulates the engine oil to and 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.

[Bank 1 / Intake] #1

[Bank 1 / Intake] #2

[Bank 1 / Exhaust]

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 [Bank 1 / Intake] #1 , [Bank 1 / Exhaust] ItemSpecificationCoil Resistance (?)9.4 ~ 10.4 [20°C(68°F)] [Bank 1 / Intake] #2 ItemSpecificationCoil Resistance (?)10.8 ~ 12.8 [20° ...

Other information:

Hyundai Elantra AD (2016-2020) Owners Manual: Recommended Lubricants and Capacities
To help achieve proper engine and powertrain performance and durability, use only lubricants of the proper quality. The correct lubricants also help promote engine efficiency that results in improved fuel economy.These lubricants and fluids are recommended for use in your vehicle. *1 : Re ...

Hyundai Elantra AD (2016-2020) Owners Manual: Changing Engine Coolant
Have coolant changed by an authorized HYUNDAI dealer according to the Maintenance Schedule at the beginning of this chapter. WARNING Do not use engine coolant or antifreeze in the washer fluid reservoir. Engine coolant can severely obscure visibility when sprayed on the windshield and may cau ...