Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2006-09-19
2006-09-19
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
C701S114000, C123S339230
Reexamination Certificate
active
07110874
ABSTRACT:
A method is provided for evaluating the acceptability of idle roughness levels in a newly manufactured multi-cylinder internal combustion engine. The method involves calculating a plurality of metrics based upon the relative firing energies of individual cylinders in the engine and setting threshold values for each of the metrics, below which the engine is to be accepted. Similarly, threshold values are set for each of the metrics, above which the engine is to be rejected. The engine is then evaluated to determine if the engine is to be accepted or rejected based upon the calculated metrics and the threshold values for acceptance or rejection set for that metric. If the engine has not been previously accepted or rejected based on a particular metric the engine is evaluated using each of the remaining metrics. If the engine has not been rejected after all metrics have been evaluated the engine is finally accepted.
REFERENCES:
patent: 4674458 (1987-06-01), Mori
patent: 5722368 (1998-03-01), Sakai
patent: 9-72237 (1997-03-01), None
patent: 9-264179 (1997-10-01), None
Deere & Company
Vo Hieu T.
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