Patent ID: RE42940

Claim:
An air flow rate control apparatus for controlling an amount of air to be taken into an engine, comprising: a control valve disposed within an air flow passage through which an air flows; a body defining a portion of the air flow passage and rotatably accommodating said control valve; a cover attached to said body; a motor driven means for driving said control valve to a predetermined opening degree; a switching means for selectively disconnecting said driven means from said control valve; a detector for detecting a rotational position of a valve shaft to which said control valve is mounted as an opening degree of said control valve said detector disposed at an end portion of said valve shaft opposite to said motor driven means; and a controller for processing a controlled variable of an opening degree of said control valve in accordance with a detection signal from the detector and outputting to said driven means a command signal corresponding to said controlled variable; and an interface portion allowing an electrical data exchange among said detector, said driven means and said controller, and/or an electrical data exchange between these components and the outside of said apparatus through said interface portion, said interface portion disposed at the same side of said valve shaft as said detector is.