Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Reexamination Certificate
2011-03-22
2011-03-22
Beaulieu, Yonel (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
C701S050000, C701S051000
Reexamination Certificate
active
07912616
ABSTRACT:
A work machine gear shifting control device is capable of readily identifying the cause of failure in learning the clutch hydraulic pressure for operating a transmission clutch. A transmission gear shifting control section46is provided for each of clutches61-65, and performs a learning process in which each of a plurality of handling processes learns the clutch hydraulic pressure for each of the clutches61-65and determines the clutch hydraulic pressure characteristic values for operating the individual clutches. Further, the transmission gear shifting control section46performs a learning monitoring process in each of the plurality of handling processes to formulate an error judgment, which indicates whether learning has failed in each of the plurality of subprocesses, and displays the result of the judgment.
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Kowatari Youichi
Nakamura Kazunori
Tsukada Hidenobu
Yoshikawa Masaki
Beaulieu Yonel
Hitachi Construction Machinery Co. Ltd.
Mattingly & Malur, P.C.
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