VCM (Variable Cylinder Management) is fuel-saving technology that automatically deactivates 1/3 or 1/2 of the cylinders, according to the driving conditions.

Cylinder deactivation idle image

VCM, installed in a 6-cylinder engine, shuts off the valves and halts fuel supply in two cylinders when 1/3 of the cylinders are deactivated and in three cylinders when 1/2 of the cylinders are deactivated.

Engine operation with cylinder deactivation

Deactivating the cylinders means that, when VCM is in operation, it’s the same as driving a car with a smaller, lower-displacement engine, emitting less CO₂.

VCM operates during everyday driving.
You can also expect VCM to contribute to fuel savings especially at long distance driving when driving at a consistent speed.