Pic. 2.58. Actuator of the VAD system: 1 - damper is open; 2 - damper closed; 3 – damper actuator of the VAD system; 4 - rod; 5 - damper of the VAD system; 6 - intake manifold vacuum
Opens and closes shutters. Usually, the rod under the action of the spring opens the damper. When vacuum from the intake manifold is applied to the diaphragm chamber, the rod retracts, closing the throttle. The damper actuator consists of a rod, a diaphragm compartment and a spring (pic. 2.58).