What does an idle motor do? Can idle motor be universal?

The function of idle motor is to change the cross-sectional area of idle air passage according to the temperature and load when the engine is idle, so that the engine can have the best idle speed under different working conditions. Because of the different design of each car, the idle motor can not be completely universal, but some models can be universal.

Idle motor is mainly used to adjust the idle speed of the engine. All EFI vehicles with cable throttles have idle motors.

Under different ambient temperatures, the idle speed of the engine after cold start is different. The lower the temperature, the higher the idle speed. This control process is mainly completed by idle motor. The new car uses an electronic throttle and does not need an idle motor.

Extended data:

The principle of idle motor adjusting idle speed;

The idle motor is driven by a stepping motor to drive the conical valve; The movement of the conical valve can adjust the cross-sectional area of air circulation between the valve surface and the valve seat, thus changing the bypass air flow at idle speed and adjusting idle speed.

When the engine is idling, the amount of air entering the engine consists of two parts, one is the amount of air passing through the valve plate, and the other is the flow of the bypass passage controlled by the idling motor.

When idling, the valve plate of the throttle valve is not completely closed, and there is a certain amount of air leakage, which is coordinated with the adjustable bypass ventilation of the idling motor. The throttle assembly is set in the factory and cannot be changed without authorization.

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