Description:˙mexh asp. Aspirated mass flow from the exhaust manifold kg/s. ˙mint asp. Aspirated mass flow from the intake manifold kg/s. ˙mMAF. Intake mass air flow measured by MAF sensor kg/s ncyl. Number of cylinders. -. Ne. Engine speed rpm. OF. Overlap factor m2 · deg. Pint. Intake manifold pressure. P