Idling revolution number control valve for an internal combustion engine

摘要

An idling speed control valve for an internal combustion engine is disposed bypassing a throttle valve arranged at an intake passage of the engine, and proportionally controls the quantity of air flowing in the bypass passage based on an output of an electronic control unit including an idling revolution number control function. The valve is controlled by an electromagnetic coil of a solenoid device, and the coil is made of a brass series alloy wire material.