Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2005-07-19
2005-07-19
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
C060S276000, C073S118040
Reexamination Certificate
active
06920388
ABSTRACT:
An apparatus for controlling the air-fuel ratio of an internal combustion engine to compensate for the effect of the dead times of an exhaust system including a catalytic converter, etc. and to increase the purifying capability of the catalytic converter. An exhaust-side control unit7asequentially variably sets a dead time of an exhaust system E depending on the flow rate of an exhaust gas supplied to a catalytic converter3and a dead time of an air-fuel ratio manipulating system comprising an internal combustion engine1and an engine-side control unit7b, and sequentially estimates an output of an O2sensor6after a total set dead time which is the sum of the above set dead times. The exhaust-side control unit7asequentially generates a target air-fuel ratio KCMD to converge the output of the O2sensor6to a target value using the estimated value, and manipulates the air-fuel ratio of the internal combustion engine1. Using the set dead time of the exhaust system E as a dead time of an exhaust system model which serves as a basis for estimating the output of the O2sensor6, a parameter of the exhaust system model is sequentially identified.
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Honda Giken Kogyo Kabushiki Kaisha
Squire Sanders & Dempsey L.L.P.
Vo Hieu T.
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