Description And Operation: Description
The Variable Charge Motion Actuator (VCMA) is installed on the inlet of the intake manifold.
The VCM system consists of a DC motor which actuates the VCM valve and a position sensor which detects the position of the VCM valve.
It tumbles air flow entering into combustion chamber of each cylinder by closing the VCM valve in the cold start conditions.
This tumble effect reduces emission gas by increasing air/fuel mixture.
CAUTION:
The VCM actuator has to be installed at the fully closing position of the VCM valve.
If it doesn't, the VCM coupling of the VCM shaft can't be put in the VCM actuator.