Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2008-06-10
2011-11-01
Cronin, Stephen K (Department: 3747)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
C701S109000, C701S114000, C701S103000, C123S672000, C123S674000, C123S679000, C123S688000, C123S690000, C123S704000, C073S114710, C073S114720, C073S114730, C073S114750
Reexamination Certificate
active
08050852
ABSTRACT:
An abnormality detection device for an internal combustion engine capable of performing abnormality detection with accuracy, and an air/fuel ratio control apparatus for an internal combustion engine capable of performing air/fuel ratio control with accuracy. An estimated value of the amount of intake air at a valve closing time at which an intake value is closed, is computed. The in-cylinder air/fuel ratio in a cylinder is computed by using the estimated value. The obtained in-cylinder air/fuel ratio is used as an input air/fuel ratio to identify a parameter in a primary delay element. Determination as to the existence
onexistence of an abnormality in a pre-catalyst sensor (A/F sensor) is made on the basis of the obtained parameter.
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Japanese Office Action mailed Sep. 28, 2010 in corresponding Japanese Application No. 2007-188777.
Cronin Stephen K
Najmuddin Raza
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Toyota Jidosha & Kabushiki Kaisha
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