Fig. 2.215. The scheme of operation of the operating admission valve in situation "is closed"

The electronic control unit of the engine activates VSV for increase in duration of a cycle of a pulsation, at the same time vacuum affects a diaphragm of the executive mechanism. The operating valve is closed. As a result the effective length of an inlet collector increases, and efficiency of an admission in the range of low and average turns improves owing to influence of dynamics of an air stream on an admission, thus increasing engine capacity.