Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2005-11-07
2008-10-07
Wolfe, Jr., Willis R (Department: 3747)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
C701S115000, C340S439000, C123S676000, C073S114610
Reexamination Certificate
active
07433777
ABSTRACT:
An engine protection system for a construction machine can individually diagnose the exhaust temperature specific to each cylinder of an engine corresponding to an engine revolution speed in order to find an abnormal condition of each engine cylinder in advance. A revolution speed sensor14detects revolution speed of an engine mounted in the construction machine and, a plurality, e.g.,16, cylinder temperature sensors20a-20pdetect exhaust temperatures of respective cylinders of the engine. A data recording unit26and a display controller24store the detected engine revolution speed and the detected exhaust temperatures of the respective cylinders. Trend data, which is produced based on the stored data, is sent to an office via a portable terminal and the display controller24outputs, a signal for playing back and displaying snapshots based on the stored data to a display unit23disposed in the cab5.
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Akino Shinji
Furuno Yoshinori
Ikari Takanobu
Ohwada Yoshinori
Takagi Daisuke
Hitachi Construction Machinery Co. Ltd.
Mattingly, Stanger Malur & Brundidge PC
Wolfe, Jr. Willis R
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