| 摘要 |
A throttle opening degree detecting apparatus in accordance with the present invention is structured such that a resin gear is connected to a throttle shaft of a throttle valve, a permanent magnet is mounted to a part of the resin gear, and an opening degree of the throttle valve is detected by detecting a rotation angle of the resin gear on the basis of an output signal from a magnetic sensor arranged in a fixed side so as to oppose to the permanent magnet in a non-contact manner. A depressed boss portion is formed in a position of an axis of the resin gear, a yoke and the permanent magnet is mounted along an inner peripheral surface of the boss portion, and the resin gear is insert molded by a synthetic resin by inserting the yoke and the permanent magnet. Accordingly, a number of man-hour for work can be widely reduced, and it is possible to accurately fix the permanent magnet and the yoke to a predetermined position, in comparison with the conventional case that the permanent magnet is bonded to the resin gear by using the adhesive agent. Further, it is possible to accurately detect the throttle opening degree.
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