Patent ID: 7139656

Claim:
A system for determining a mass airflow per cylinder of an internal combustion engine with an intake manifold, comprising: a first signal input device that receives a manifold pressure (MAP) signal based on an absolute pressure of the intake manifold; a second signal input device that receives a mass airflow (MAF) signal based on the mass of airflow entering the engine; a third signal input device that receives an induction air temperature (IAT) signal based on the temperature of air in the intake manifold of the engine; and a processor that receives said MAP signal, said MAF signal, and said IAT signal and that filters said MAP signal, calculates an estimated MAP value based on an initial mass airflow per cylinder (MAC) value, said MAF signal, and said IAT signal and determines a mass airflow per cylinder based on said filtered MAP, said estimated MAP, and said initial MAC value.