Patent ID: 7469671

Claim:
An air-intake duct through which air taken in from outside is guided to an air flow rate control device configured to control an amount of air flow that is supplied to an engine of a vehicle, the air-intake duct comprising: a pipe-shaped portion that is coupled to the flow rate control device and has an air-intake passage formed therein; a chamber portion that is located upstream of the air-intake passage of the pipe-shaped portion in the air flow and has an inner diameter larger than an inner diameter of the pipe-shaped portion; and an extended pipe-shaped portion configured to extend continuously from the pipe-shaped portion so as to protrude into an inner space of the chamber portion, the extended pipe-shaped portion forming an extended passage connected to the air-intake passage of the pipe-shaped portion; wherein the chamber portion is continuous with and integral with the pipe-shaped portion, and an inlet end portion of the chamber portion is connected to an air outlet of an air cleaner element.