Kia Optima Hybrid: 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 runs out 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 specification. Specification: ...

CVVT Oil Control Valve (OCV) Specifications

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

Other information:

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Shift Lever Repair procedures


Removal 1. Disconnect the 12V battery negative (-) cable. 2. Remove the knob (A) and boots (B) by pulling the direction of arrow after removing the boots from the console upper cover. 3. Remove the floor console assembly. (Refer to Body - "Console") 4. Disconnect the main connector (A). 5. Disconnect ...

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Accelerator Pedal Repair procedures


Removal 1. Turn the ignition switch OFF and disconnect the negative (-) battery terminal. 2. Disconnect the accelerator position sensor connector (A). 3. Remove the mounting nuts (B) and bolt (C), and then remove the accelerator pedal module. Installation 1. Install in the reverse order of removal. Accelerator ...

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