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Tuning Guide
48
The Volumetric Efficiency is combined with temperature sensor data to estimate a compensated Mass Airflow. The
ChargeTempBlend table dictates what ratio of air temperature to coolant temperature is used at specific Engine
RPM to adjust the density of the inducted air. A higher number gives priority to Coolant Temperature, and is seen
at lower Engine RPM.
Once Mass Airflow has been calculated using the tables above, the Infinity ECU will look up the Target Lambda
(AFR) and then calculate the fuel requirements. Target AFR will be used as a main parameter in determining fuel
injector flow rate. The LambdaTargetTable (below Left) and AFR Target Table conversion table (below Right) will
have default values. Based on the calculated Mass Airflow, the Infinity ECU will attempt to add enough fuel to hit
the target AFR.
Note: The calculated LambdaTarget influences the fuel delivered to the engine at all times, even when closed-loop
02 feedback is disabled.
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