Patent ID: 8671910

Claim:
An intake air quantity control device for an internal combustion engine, comprising: a throttle body that comprises a throttle valve component for openably/closably supporting a throttle valve by a throttle shaft, and a drive chamber for installing a motor for driving the throttle valve, and a fan-shaped throttle gear fixed to one end portion of the throttle shaft and having a fitting portion at a portion of the throttle gear, wherein an open area formed at a portion of the throttle body is encapsulated by a cover including a rotational angle detector; wherein said rotational angle detector including: a rotor that is rotatably supported and arranged in the cover in such a way that an axis of the rotor is identical to an axis of the throttle gear; and a lever that is provided at a portion of the rotor, which is faced to the throttle shaft, and engaged to the fitting portion of the throttle gear at a portion of the lever.