EGR CONTROL OPERATION [WL-3]

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• To improve emission performance, target EGR valve position has been decided based on intake air flow, engine speed and engine coolant temperature.

• The PCM controls the vacuum applied to EGR valve by opening and closing two-duty solenoid valve.

• The flow amount of the EGR is calculated from the difference between the following amounts:

― Target intake air amount that is mainly calculated from engine speed and fuel injection amount

― Actual intake air amount that is mainly detected by MAF sensor/IAT sensor No.2