Patent ID: 6971264
Filing Date: 2005-12-06
Classification: F02D

Abstract:
1. A throttle opening degree detecting apparatus comprising: a resin gear connected to a throttle shaft of a throttle valve and provided with a depressed boss portion in an axial position; a permanent magnet mounted along an inner peripheral surface of said boss portion in said resin gear and having a generally rectangularly-shaped cross-section defining a first surface facing inwardly relative to the inner peripheral surface of said boss portion and a second surface opposite the first surface facing outwardly toward the inner peripheral surface of said boss portion; a yoke mounted along the inner peripheral surface of said boss portion in said resin gear; and a magnetic sensor arranged in a fixed side so as to oppose to said permanent magnet in a non-contact manner, and outputting a signal indicating a rotation angle of said resin gear as an opening degree of said throttle valve, wherein said resin gear is insert molded by inserting said yoke and said permanent magnet with the resin gear contacting at least a portion of both the first and second surfaces of the permanent magnet after being insert molded.