The Variable Swirl Actuator is installed in between the two intake manifolds and consists of a DC motor which actuates the swirl valve and a position sensor which detects the position of the swirl valve. This swirl system optimizes air flow entering into combustion chamber of each cylinder in accordance with the various engine conditions.

[At High Speed or High Load] Swirl valve opening → Swirl amount decreasing → Swirl effect increasing → Pumping loss decreasing → Engine power increasing

[At Low/Middle Speed or Low Load] Swirl valve closing → Swirl amount increasing → Air/fuel mixture increasing → EGR amount enlarging → Emission reducing