Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2006-11-21
2006-11-21
Vo, Hieu T. (Department: 3747)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
C073S117020
Reexamination Certificate
active
07139656
ABSTRACT:
A method of dynamically determining a mass airflow per cylinder in order to control operation of an internal combustion engine includes first initializing a mass airflow per cylinder (MAC) value. A manifold pressure (MAP) signal, a mass airflow (MAF) signal, and an induction air temperature (IAT) signal is then received. An estimated manifold pressure is calculated from the MAF, the IAT, and the initialized MAC. A filter is applied to the MAP. A manifold pressure error is determined from the estimated manifold pressure and the filtered manifold pressure. A product is computed of the manifold pressure error and the initialized MAC. The product is adapted. A mass airflow per cylinder is computed, as a second product, based on the adapted product and the initialized MAC. Engine operation is controlled based on the mass airflow per cylinder.
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DeVries Christopher
GM Global Technology Operations Inc.
Vo Hieu T.
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