What is the working principle of automobile idle motor?

Idle motor is an element to control the idle speed of EFI engine. It is also the component with the highest failure rate of EFI engine. However, some idle faults are difficult to deal with and belong to difficult faults, because idle working condition is a special working condition and requires a strong mixture. Many problems will cause idle failures. Among the idle failures of many reasons, different idle failures will occur due to different engine structures. This paper discusses the stepping motor type idle air valve. In order to reduce the problems involved as much as possible, only the idle failure caused by the idle gas path system itself is analyzed, and other idle failure problems (such as ignition timing, mechanical compression and other problems caused by non-idle system itself) are not involved.

Idle motor is an element to control the idle speed of motor vehicles, which is mainly used to bear the idle speed of motor vehicles. Its purpose is to adjust the idle speed according to the engine load at idle speed. Idle stepper motor is installed on the throttle body and used by the engine controller to control the idle speed of the engine. When the engine speed deviates from the idle speed, it is adjusted by the throttle valve to control the amount of air entering the intake manifold, which is mechanically operated by the accelerator pedal wire rope. The throttle body has a bypass air passage to provide air when the engine is idling (when the throttle is closed). When idling, the cross-sectional area of idle air passage is changed according to the temperature and load of the engine, so that the engine has the best idle speed under different working conditions.