Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2006-12-05
2006-12-05
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
C123S090150, C123S090170
Reexamination Certificate
active
07146267
ABSTRACT:
An engine control apparatus includes a valve operating mechanism for transmitting the rotation of a crankshaft to camshafts through a timing wrapping member. A control unit includes a phase detection section that detects the phase of a camshaft relative to the crankshaft, an abnormality determination section that makes, based on the detected phase, a determination whether the valve operating mechanism is abnormal, a threshold storage section that stores determination references as a lower limit threshold and an upper limit threshold, an initial phase storage section that stores, as an initial phase, a phase detected at the time of engine installation, and a phase correction section that corrects the phase detected during engine operation by using the initial phase thereby to calculate a corrected phase. The abnormality determination section outputs an abnormality determination signal when the corrected phase deviates from a determination reference range of from the lower to upper limit thresholds.
REFERENCES:
patent: 5255192 (1993-10-01), Ito et al.
patent: 5715779 (1998-02-01), Kato et al.
patent: 6006707 (1999-12-01), Ito
patent: 6213069 (2001-04-01), Wada et al.
patent: 6834627 (2004-12-01), Hiraku et al.
patent: 2001/0019267 (2001-09-01), Shimizu et al.
patent: 2004/0187815 (2004-09-01), Hiraku et al.
patent: 2001-164980 (2001-06-01), None
patent: 2002-309994 (2002-10-01), None
Hanazaki Ryoichi
Sawada Satoshi
Kwon John T.
Mitsubishi Denki & Kabushiki Kaisha
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