Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2006-07-18
2006-07-18
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
C073S118040, C073S117020
Reexamination Certificate
active
07079937
ABSTRACT:
An air quantity estimation apparatus for an internal combustion engine estimates intake pipe section pressure, which is pressure of air within an intake pipe section. When throttle valve opening is smaller than a threshold value, the apparatus estimates the intake pipe section pressure by use of an intercooler model constructed on the basis of conservation laws for air within the intercooler section and an intake pipe model constructed based on conservation laws for air within the intake pipe section. Meanwhile, when the throttle valve opening is greater than the threshold value, the apparatus estimates the intake pipe section pressure by use of an intercooler-intake pipe combined model constructed based on conservation laws for air within a combined section formed by combining the intercooler section and the intake pipe section. The apparatus estimates cylinder air quantity on the basis of the estimated intake pipe section pressure.
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Toyota Jidosha & Kabushiki Kaisha
Vo Hieu T.
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