Composition structure and principle of engine idle speed control system

Component structure of idle speed control system (1) Throttle direct-acting idle speed control actuator The throttle direct-acting idle speed control actuator installed on the throttle body of a single-point injection engine, as shown in the following figure, consists of the following two parts. Direct acting throttle idle control actuator: 1. Throttle control arm; 2. Throttle body; 3. Idle speed control actuator; 4. Fuel injector; 5. Pressure regulator; 6. Throttle valve; 7. Anti-rotation hexagonal hole; 8. Spring; 9. Motor; 10,11,13. Reduction gear; 12. transmission shaft; 14. Fuck the DC car. Control the power part of the idle actuator, and ECU controls its rotation through the drive circuit. The transmission mechanism plays the role of increasing torque and reducing speed, and changes the electric rotary motion into the linear motion of the throttle control arm limiter. When the ECU outputs the idle speed adjustment control signal, the motor is energized by the drive circuit and rotates by the rotation angle corresponding to the control signal pulse. Driven by the transmission mechanism, the limiter of the throttle control arm moves, thus changing the opening of the throttle at idle speed. (2) Idle control valve of stepping motor The idle control valve of stepping motor is mainly composed of stepping motor, screw mechanism and air valve (below). Idle speed control valve of stepping motor: 1. Air valve seat; 2. Valve stem; 3. Stator winding; 4. Bearing; 5. screws; 6. Rotor; 7. The rotor and the screw of the stepping motor of the air valve body form a screw mechanism. When that step motor rotates,