Kia Sorento: CVVT (Continuously Variable Valve Timing) System 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). CVVT improves engine performance through reduction of pump loss, internal EGR effect, improvement of combustion stability, improvement of volumetric efficiency, and increase of expansion work.

This system consist of

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.

Catalytic Converter Installation

1. Install in the reverse order of removal. ...

CVVT (Continuously Variable Valve Timing) System Operation Principle

The CVVT has the mechanism rotating the rotor vane with hydraulic force generated by the engine oil supplied to the advance or retard chamber in accordance with the CVVT oil control valve con ...

See also:

Inspection
[Evap Leak Test] Engine Control Module (ECM) controls Purge Control Solenoid Valve (PCSV) and Canister Close Valve (CCV) for EVAP System diagnosis if the conditions are satisfied ...

Front seat adjustment - manual
Forward and backward To move the seat forward or backward: 1. Pull the seat slide adjustment lever up and hold it. 2. Slide the seat to the position you desire. 3. Release the lever and make sur ...

Hands Free Switch Installation
1. Install the handsfree remote switch to the steering wheel front cover. 2. Install the steering wheel front cover. 3 ...