Description And Operation: Description

• The Variable Charge Motion Actuator (VCMA) is installed on the inlet of the intake manifold.
• It consists of a DC motor which actuates the VCM valve and a position sensor which detects the position of the VCM valve.
• The VCM system tumbles air flow entering into combustion chamber of each cylinder by closing the VCM valve in the cold start conditions.
• This tumble effect reduces cold start emissions by improving atomization

Courtesy of KIA MOTORS AMERICA, INC.