Motor-Driven Throttle Valve Control Device Having Inductance-Based Noncontact Rotation Angle Detecting Device, and Rotation Angle Detecting Device Used for the Same

摘要

A motor-driven throttle valve control device having high reliability and resistance to electrostatic noise from the gear cover connector is obtained by compactly forming an inductance-based noncontact rotation angle detecting device at the end of the throttle shaft. In the present invention, an excitation conductor is attached to the tip of the throttle shaft to which the throttle valve is attached. The gear cover is provided with a magnetic field exciting conductor and a signal detection conductor to face the excitation conductor. Further, an insulating member is arranged between the rotating shaft (throttle shaft) and the magnetic field exciting conductor and signal detection conductor. With this configuration, a motor-driven throttle valve control device having an inductance-based noncontact rotation angle detecting device, not affected by electrostatic noise and having high reliability, is realized.