Patent ID: 11952749
Assignee: KOMATSU LTD.
Field: Civil engineering (Other fields)
Classification: CPC E  F  B | IPC E  F

Claim 0:
1. A control device for a power machine including
a drive source,
a hydraulic pump driven by a driving force of the drive source,
a power take off device configured to transmit a portion of the driving force of the drive source to the hydraulic pump,
a power transmission device including a hydrostatic continuously variable transmission, an input shaft connected to the power take off device, and an output shaft connected to a load, and transmitting the driving force input to the input shaft to the output shaft, and
an operation device that provides an instruction regarding a magnitude of the driving force of the drive source,, the control device comprising:
a target circuit pressure specifying unit configured to specify a target circuit pressure of the hydrostatic continuously variable transmission;
a measurement value acquisition unit configured to acquire an actual circuit pressure of the hydrostatic continuously variable transmission;
a brake torque determination unit configured to determine a brake torque based on the target circuit pressure and the actual circuit pressure, the brake torque being a torque consumed by the hydraulic pump; and
a pump control unit configured to control the hydraulic pump based on the brake torque.