Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle diagnosis or maintenance indication
Patent
1997-08-19
1999-11-30
Louis-Jacques, Jacques H.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle diagnosis or maintenance indication
701123, 701 29, 73113, 73114, 3404574, G06G 770
Patent
active
059958863
ABSTRACT:
A system for the estimation of residual service time of a work vehicle includes an arithmetic and logic unit which is inputted with an engine speed and a speed difference from a controller for an engine, with a signal, which indicates whether or not at least one of several control levers has been operated, from a lever position detector, and also with a residual fuel quantity in a fuel tank from a converting device. The residual fuel quantity is determined at intervals of about 1 hour at the arithmetic and logic unit. Upon an elapse of each short period of time, a quantity of fuel consumed during said short time, said quantity being obtained based on a difference in engine speed, is subtracted from the residual fuel quantity, whereby a calculated residual fuel quantity is obtained. A quantity of fuel consumed from a preceding residual fuel quantity measurement period to a current residual fuel quantity measurement period is divided by the calculated residual fuel quantity to obtain a value. The residual fuel quantity is then divided by this value to compute a residual service time, which is then displayed on a display.
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Furuno Yoshinori
Sugiyama Yukihiko
Tanaka Yasuo
Watanabe Yutaka
Yagyu Takashi
Hitachi Construction Machinery Co. Ltd.
Louis-Jacques Jacques H.
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