Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Reexamination Certificate
2006-08-08
2006-08-08
Huynh, Hai (Department: 3747)
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
C073S023320
Reexamination Certificate
active
07086391
ABSTRACT:
The present invention relates to a method of estimating the fuel/air ratio in each cylinder of a multicylinder internal-combustion engine comprising an exhaust circuit in which a single detector measures the fuel/air ratio of the exhaust gas. The estimator comprises a physical model (RTM) representing the expulsion of the gases from the cylinders and the travel thereof in the exhaust circuit to the detector, the model being coupled with a non-linear state observer of Extended Kalman Filter (KF) type.
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Castagne Michel
Corde Gilles
Moulin Philippe
Rousseau Grégory
Huynh Hai
Institut Francais du Pe'trole
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