•  The variable valve timing mechanism continuously modifies the phases of the variable valve timing actuator and the intake camshaft using hydraulic pressure controlled by the oil control valve (OCV) so that optimal valve timing is obtained according to engine operation conditions.

•  The OCV operation is based on signals from the PCM according to engine operation conditions and it controls hydraulic pressure to the variable valve timing actuator.

•  Startability has been improved because the overlap amount has been minimized to prevent combusted gas from returning to the intake port.

•  The overlap amount has been minimized to prevent combusted gas from returning to the intake port and to reduce the additional fuel injection amount. This improves fuel economy and stabilizes fast idle speed.

•  Due to a reduction in the amount of overlap, less combusted gas is returned to the intake port. This stabilizes idle speed in the idling range, improving fuel consumption, and also ensures engine stability in the light load range.

•  Overlap amount has been increased and the EGR ratio inside the cylinder is higher. This reduces engine friction loss (pumping loss), lowering the combustion temperature and reducing the amount of NOx the in exhaust gas. The amount of hydrocarbon emission has also been reduced through reignition of non-combusted gas.

•  Low to mid-speed torque has been improved by increasing the speed of the intake air valve closing-time to improve the volumetric efficiency of the intake valve at the point where intake air volume is at its highest.

•  Maximum output has been improved by slowing the close-timing of the intake air valve to improve volumetric efficiency of the valve by slowing the air intake in relation to piston speed.