EGR CONTROL OPERATION [MZR-CD (RF Turbo)]

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• The PCM calculates the necessary EGR amount and oxygen concentration based on the input signal, and operates the EGR valve (DC motor) to meet the target value.
• The EGR amount is determined by the difference between the following values:

  ― Target intake air amount calculated from engine speed and fuel injection amount.
  ― Actual intake air amount detected by MAF/IAT sensor.

• Oxygen concentration is determined by the difference between the following values:

  ― Target intake air amount calculated from engine speed and fuel injection amount.
  ― Actual intake air amount detected by MAF/IAT sensor, boost sensor, and A/F sensor.