The role of the water temperature sensor
1. Correct the fuel injection amount; increase the fuel injection amount when the temperature is low.
2. Correct the ignition advance angle; increase the ignition advance angle at low temperature, and delay the explosion to prevent deflagration.
3. Influence the idle speed control valve; when the temperature is low, the ECU controls the idle speed control valve according to the water temperature sensing signal to improve the speed change.
4. Affect the EGR valve;