Kia Carens: Engine Control System / 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.

Purge Control Solenoid Valve (PCSV) Repair procedures

Inspection 1. Turn the ignition switch OFF. 2. Disconnect the PCSV connector. 3. Measure resistance betwe ...

CVVT Oil Control Valve (OCV) Specifications

Specification Item Specification Coil Resistance (Ω) 6.9 ~ 7.9 [20°C(68°F)] ...

Other information:

Kia Carens RP (2013-2018) Service Manual: Knock Sensor (KS) Description and operation

Description Knocking is a phenomenon characterized by undesirable vibration and noise and can cause engine damage. Knock Sensor (KS) is installed on the cylinder block and senses engine knocking. When knocking occurs, the vibration from the cylinder block is applied as pre ...

Kia Carens RP (2013-2018) Owners Manual: Before entering vehicle

Be sure that all windows, outside mirror(s), and outside lights are clean. Check the condition of the tires. Check under the vehicle for any sign of leaks. Be sure there are no obstacles behind you if you intend to back up. Necessary inspections Fluid levels, such as engine oil, engine coolant ...