DEVICE AND METHOD FOR CONTROLLING HYDRAULIC PUMP IN CONSTRUCTION MACHINE

摘要

Disclosed are a device and a method for controlling a hydraulic pump in a construction machine, the method including: an engine dynamic characteristic change checking step S20 of checking whether a dynamic characteristic of an engine deviates from a predetermined permissible range when a load is applied to the hydraulic pump and a pump load reaches pump torque required by the hydraulic pump; a pump load applying step S40 of when the dynamic characteristic of the engine deviates from the predetermined permissible range in the engine dynamic characteristic change checking step S20, applying a pump load to the hydraulic pump so as to increase the pump torque to predetermined torque with a predetermined change rate; an information collecting step S50 of collecting information including engine speed information, swash plate angle information of the pump, and pressure information of discharged working oil, which is generated when the pump load is applied in the pump load applying step S40; a map data generating step S60 of generating a new torque change rate map 220a by generating a torque change rate for each load section based on the information collected in the information collecting step S50; and an updating step S80 for updating an existing torque change rate map 220 to the new torque change rate map 220a generated in the map data generating step S60, in which the hydraulic pump is controlled by the new torque change rate map 220a updated in the updating step S80.