Engine idling speed control system for internal combustion engine

摘要

In an engine idling speed control system for an internal combustion engine, by feedback controlling increasingly or decreasingly, the amount of intake air fed to the engine with a controlling value variable in accordance with a difference between an actual engine speed and a desired idling speed so as to control the engine to drop speed to the desired idling speed, decreasing variations of the controlling value are restricted to a limit value which is higher when the vehicle is running at a speed higher than a predetermined vehicle creeping speed than when at a running speed lower than the predetermined vehicle creeping speed.