Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2007-01-31
2008-09-23
Kwon, John T (Department: 3747)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
C123S406180, C123S487000, C073S116070
Reexamination Certificate
active
07428459
ABSTRACT:
In an apparatus for controlling an engine, an abnormality determining unit determines whether the crank signal is abnormal based on a state of a input signal for an interval measuring unit. The interval measuring unit measures a time interval from when a predetermined-directed level change appears in the input signal and a temporally next predetermined-directed level change appears therein. An input unit switches the input signal for the interval measuring unit from a crank signal to a cam signal when it is determined that the crank signal is abnormal. The crank signal has a level that repetitively changes in a predetermined direction each time the crankshaft rotates by a first angle. The cam signal has a level that repetitively changes in time in a predetermined direction each time the camshaft rotates at least by a second angle different from the first angle.
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Denso Corporation
Kwon John T
Nixon & Vanderhye PC
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