| 摘要 |
<p>PURPOSE: To highly efficiently drive each of hydraulic equipment while certainly preventing its stoppage of actuation by using a small and low cost engine in a device to drive a plural number of the hydraulic equipment by the common engine. CONSTITUTION: These are an operation control method and a device of a hydraulic drive device connecting a plural number of hydraulic pumps 10A-10D to a common engine Eg. Pump load torque computing means 41A-41D compute driving load torque of each of the hydraulic pumps 10A-10D, and an engine torque computing means 42 computes engine output torque. A pump discharge quantity control means 43 controls each pump discharge flow rate by outputting an electric current to pump regulators 38A-38D by means of comparing the sum of the driving load torque and the engine output torque with each other and so as to restrain the former less than the latter.</p> |
