The main features of the duct with varying characteristics (VAD) (L3)
Fig.2.57.VAD system car Mazda 3 with an engine L3: 1 - damper system VAD;2 - the control solenoid valve VAD;3 - vacuum chamber system VAD;4 - check valve VAD system
VAD control system opens the shutter in the housing of the air filter at high engine speeds to increase the air flow. The system consists of flaps, solenoid valve, a vacuum chamber and a check valve. Normally, under the influence of the spring rod opens the damper (Fig. 2.57).