Patent ID: 7316113

Claim:
A control device for a work machine hydraulic pump used on a work vehicle in which an engine torque is transferred to a work machine via the work machine hydraulic pump of a variable displacement type as well as to a traveling body, the control device comprising: engine speed detecting means for detecting an engine speed; setting means for presetting an upper limit for a capacity of the work machine hydraulic pump corresponding to an engine speed in a range in which the engine speed is equal to or lower than a predetermined speed; and control means for controlling the capacity of the work machine hydraulic pump so as not to exceed the capacity upper limit corresponding to a currently detected engine speed, when the engine speed detected by the engine speed detecting means is equal to or lower than the predetermined speed, wherein the work vehicle is controllable to vary engine rotation so as to obtain an engine speed corresponding to an operation amount of a traveling operation means, and wherein the capacity of the work machine hydraulic pump is controllable by the control means on a condition that the operation amount of the traveling operation means is equal to or greater than a predetermined operation amount.