Intake air amount control apparatus for an engine

摘要

An intake air amount control apparatus for an engine is capable of stabilizing the controllability of a valve ( 10 ) as well as reducing the number of component parts required. A coil spring ( 11 ) includes a first spring portion ( 11 a) having a first end portion ( 12 ), a second spring portion ( 11 b) having a second end portion ( 13 ), a joint portion ( 19 ) that connects the first spring portion ( 11 a) and the second spring portion ( 11 b) with each other. The first end portion ( 12 ) of the first spring portion ( 11 a) and the second end portion ( 13 ) of the second spring portion ( 11 b) are attached to a body ( 9 ) through a movable member ( 14 ), and the joint portion ( 19 ) is attached to a final spur gear ( 4 ).