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US 12,480,282 B2Granted
Method of controlling hydraulic device
AssigneeNabtesco Corporation
InventorHiromi Nagayama
Life of this patent
Estimating the term…
Abstract
A method of controlling an oil pressure system according to an aspect of the disclosure includes: a comparison step of comparing a measured load (engine torque calculation value) of an oil pressure system driven by an oil pressure pump with an allowable load of the oil pressure system (allowable engine torque value); and a control step of controlling a flow rate of the oil pressure pump based on a result of comparison between the measured load and the allowable load.
Claims9
A method of controlling a hydraulic device, comprising:
- a comparison step of comparing a measured load of the hydraulic device driven by a hydraulic pump with an allowable load of the hydraulic device;
- and
- a control step of controlling a flow rate of the hydraulic pump based on a result of comparison between the measured load and the allowable load,
- wherein an engine drives the hydraulic pump, and the hydraulic pump drives a hydraulic motor, and
- wherein the measured load of the hydraulic device includes an engine torque calculation value calculated based on a discharge pressure of the hydraulic pump, a suction pressure of the hydraulic pump, and a rotation speed of the hydraulic motor or a flow rate of the hydraulic motor.
2 more elements
A method of controlling a hydraulic device, comprising:
- a comparison step of comparing a measured load of the hydraulic device driven by a hydraulic pump with an allowable load of the hydraulic device;
- and
- a control step of controlling a flow rate of the hydraulic pump based on a result of comparison between the measured load and the allowable load,
- wherein an engine drives the hydraulic pump, and the hydraulic pump drives a hydraulic motor,
- wherein an engine torque calculation value is calculated based on a discharge pressure of the hydraulic pump, a suction pressure of the hydraulic pump, and a rotation speed of the hydraulic motor or a flow rate of the hydraulic motor,
- wherein an allowable engine torque value is predetermined based on a rotation speed of the engine or an amount of operation of an operation unit for operating the engine,
- wherein in the comparison step, comparison is performed between the engine torque calculation value as the measured load and the allowable engine torque value as the allowable load, and
- wherein in the control step, when the engine torque calculation value exceeds the allowable engine torque value, the flow rate of the hydraulic pump is reduced by adjusting a control valve.
5 more elements
Dependencies are inferred from the claim text.