There are several types of idle speed control systems.

1. Start-up control: When the engine starts, the idle speed control system controls the idle actuator to maximize the bypass air intake to facilitate the start-up; After startup, determine the bypass air inlet according to the cooling water temperature.

2. Warm-up control: In the warm-up stage, the idle speed control system constantly adjusts the bypass air intake according to the change of cooling water temperature, so as to keep the engine at a stable speed under the change of temperature state.

3. Idle speed feedback control: When the warm-up process is over, or ECU detects the signal that the throttle is fully closed and the vehicle speed is lower than 2km/h, the idle speed control system starts idle speed feedback control.

4. Idle speed control when the electrical load increases: When the number of electrical appliances used at the same time increases, the idle speed control system should correspondingly increase the bypass air intake to improve the idle speed of the engine.

Extended data

Idle speed control purpose

1, reducing idle emission;

2. Improve fuel economy;

3. Improve the idle stability;

4. Get good driving comfort;

5, realize the characteristics of fast and smooth transition.

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