| 摘要 |
A device and a method for control of construction machinery capable of controlling a pump flow rate so that a pump delivery pressure does not rise excessively even in a grading operation so as to suppress an engine output loss, and thus preventing a fuel efficiency from being deteriorated; the device comprising hydraulic pumps (51) and (52), a plurality of operation members (54), and a control means (1) to control a delivery flow rate from the hydraulic pumps; the control means (1) comprising a boom fine operation judgment means (2) which judges whether or not a boom fine operation is performed based on the manipulated variable of a boom operating member (54a), a stick fine operation judgment means (3) which judges whether or not a stick fine operation is performed based on the manipulated variable of a stick operating member (54b), a bucket fine operation judgment means (4) which judges whether or not a bucket fine operation is performed based on the manipulated variable of a bucket operating member (54c), and a pump inclination angle control means (5) which performs the inclination angle control of the hydraulic pumps (51) and (52) based on the judgment results of the boom fine operation judgment means (2), stick fine operation judgment means (3), and bucket fine operation judgment means (4).
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