Construction machine with automatic accelerator system for the driving engine and a control system for the driving engine and the hydraulic pump

摘要

PROBLEM TO BE SOLVED: To provide an auto-acceleration device for a motor of a hydraulic construction machine capable of controlling speed of an engine revolution corresponding to fluctuation of actuator load in operation to increase the speed of the engine revolution as the actuator load is increase, and controlling the speed of the engine revolution by only an operation direction and operation quantity of an operation commanding means in other operations. ;SOLUTION: In operation of arm-crowd or traveling, correction gain KAC or KTR based on operation pilot pressure is operated by an operation part 700d2 or 700d4; reducing correction quantity DND based on KAC or KTR is determined by an operation part 700h; correction gain KACH or KTRH based on operation pilot pressure is operated by an operation part 700m or 700p; increasing correction quantity DNH based on KACH or KTRH is determined by operation parts 700q-700s; and a reference target speed of revolution NRO is corrected by DND and DNH. In operation other than arm-crowd or traveling, NRO is corrected by reducing correction quantity DND based on only the correction gain by the operation pilot pressure.;COPYRIGHT: (C)1999,JPO