What is idle speed control actuator?

An idle speed control actuator is a device used in internal combustion engines to regulate the engine's idle speed. It adjusts the amount of air entering the engine when the throttle is closed, ensuring smooth operation at idle and preventing stalling. Typically, it is controlled electronically, responding to signals from the engine control unit (ECU) based on factors like engine temperature and load conditions. This actuator helps maintain optimal engine performance and fuel efficiency during idle conditions.