Patent ID: 7134422

Claim:
An intake air control apparatus for use with a vehicle engine, the intake air control apparatus comprising: an intake air routing assembly, comprising: an air-introducing member having an air-intake channel formed therein and having an expanded portion which defines part of the air-intake channel; and a preliminary throttle valve for adjustably regulating the amount of intake air flowing through the air-intake channel, wherein the preliminary throttle valve comprises an adjustable blocking body for varying the cross-sectional area of the air-intake channel; wherein the blocking body is disposed in said expanded portion of said air-introducing member, wherein the blocking body is supported on a support shaft so as to be pivotable about an axis perpendicular to a direction of air flow within the air-intake channel, and the support shaft is disposed on the upstream side of said blocking body, and wherein a main throttle body is disposed downstream relative to the air introducing member, the main throttle body comprising a main throttle valve which permits adjustment of air flow within the main throttle body.