Title:
HYDRAULIC DRIVE APPARATUS OF CONSTRUCTION MACHINE
Document Type and Number:
Japanese Patent JPH0650309
Kind Code:
A
Abstract:
PURPOSE: To enable a composite operation to be carried out continuously even if either of two negative consensors fails in a hydraulic drive apparatus of a construction machine.
CONSTITUTION: A control unit 21 is provided with first and second abnormality judging means for judging respectively an abnormality in a signal from negative consensors 19, 20, a correction means for converting the abnormal signal to other normal signal when one of signals from the negative consensors 19, 20 is judged to be abnormal by the first and second abnormality judging means, first and second calculation controlling means for outputting discharge commanding signals Da, Db of hydraulic pumps 1, 2 on the basis of the other normal signals.
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Inventors:
YASUDA HAJIME
Application Number:
JP20671792A
Publication Date:
February 22, 1994
Filing Date:
August 03, 1992
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
F15B11/00; F15B11/16; F15B11/17; F15B20/00; (IPC1-7): F15B20/00; F15B11/00; F15B11/16
Attorney, Agent or Firm:
Kasuga
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