What is the working principle of the idle speed motor?

[StWillow]

Here is the working principle of the idle speed motor: 1. The idle speed motor itself has 4 working states, which are stator coil AB energized (CD de-energized), stator coil CD energized (AB de-energized), stator coil AB energized (CD de-energized), and stator coil CD energized (AB de-energized) in sequence. 2. Under the control of the engine ECU, the idle speed motor cycles through the above working states repeatedly, driving the rotor of the idle speed motor to rotate continuously in a clockwise direction. Through the screw mechanism, the valve core is gradually pushed out, reducing the engine's air intake. 3. Similarly, to lower the engine speed, if the pulse signal sequence sent by the engine ECU is reversed, the valve core of the idle speed motor is retracted, thereby increasing the engine idle speed.