Patent ID: 7275517

Claim:
An intake-air control device for an internal combustion engine comprising: a throttle valve for controlling the amount of intake-air into the internal combustion engine by being rotated about a throttle shaft arranged in an air-intake pipe of the internal combustion engine; and a throttle position sensor for detecting the rotational position of the throttle valve, wherein the throttle position sensor includes magnetic field generating means that rotates together with the throttle valve and generates a detecting magnetic field in which the direction of magnetic field varies according to the rotation thereof and a magnetic field detecting assembly arranged so as to oppose to the magnetic field generating means, wherein the magnetic field detecting assembly of the throttle position sensor includes a plurality of terminal leads, a resin holder secured on the plurality of terminal leads, a sensor member arranged in the detecting magnetic field and generates a sensor output according to the direction of the magnetic field, and a resin mold body including the plurality of terminal leads, the resin holder and the sensor member are insert-molded, the resin holder has a supporting surface positioned on a plane intersecting substantially orthogonally to an axial line of the throttle shaft, the sensor member includes a resin mold coat having first and second main surfaces opposing substantially in parallel with each other, and the sensor member is held in the resin mold body with the first main surface of the resin mold coat being in contact with the supporting surface of the resin holder.