Patent ID: 7080618

Claim:
A variable intake system of a vehicle, comprising: a plenum configured to receive a flow of external air; an intake manifold connected to the plenum with a connecting passage and comprising a plurality of runners configured to guide the air of the plenum into a plurality of cylinders; and a varying unit controlling a length of the runners according to vehicle driving conditions, wherein the varying unit comprises: a first connecting part interconnecting the plenum and the intake manifold at an upper portion of the plenum, and having a first plurality of guide passages for distributing the air from the plenum to the intake manifold; a second connecting part interconnecting the plenum and the intake manifold at a lower portion of the plenum, and having a second plurality of guide passages for distributing the air from the plenum to the intake manifold; a first opening/closing part disposed on the first connecting part so as to selectively open/close the first plurality of guide passages; and a second opening/closing part disposed on the second connecting part so as to selectively open/close the second plurality of guide passages, wherein each of the first and second pluralities of guide passages is tilted at a predetermined angle.