Hydraulic System, Work Vehicle, Control Method, and Computer Program
AssigneeKubota Corporation
InventorYasuhiro Manji
Life of this patent
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Abstract
A technique capable of obtaining an output higher than a normal output as necessary is provided. A hydraulic system S includes a hydraulic pump 32, a supply oil passage 58 that supplies hydraulic oil from the hydraulic pump 32 to a front loader 4 operated by hydraulic pressure, a pump motor 30 that drives the hydraulic pump 32, and a processing device 18 that performs selection processing of selecting a control mode of the pump motor 30 from a first mode and a second mode. The first mode is a mode in which an upper limit value of a torque command value indicating torque to be output by the pump motor 30 is a first command value. The second mode is a mode in which the upper limit value is a second command value larger than the first command value.
Claims9
A hydraulic system comprising:
- a hydraulic pump;
- a supply oil passage that supplies hydraulic oil from the hydraulic pump to a working device operated by hydraulic pressure;
- an electric motor that drives the hydraulic pump;
- and
- a processing device that performs selection processing of selecting a control mode of the electric motor from a first mode and a second mode,
- wherein:
- the first mode is a mode in which an upper limit value of a torque command value indicating torque to be output by the electric motor is a first command value, and
- the second mode is a mode in which the upper limit value is a second command value larger than the first command value.
A control method for an electric motor that drives a hydraulic pump for supplying hydraulic oil to a working device, the method comprising:
- selecting a control mode of the electric motor from a first mode and a second mode, wherein:
- the first mode is a mode in which an upper limit value of a torque command value indicating torque to be output by the electric motor is a first command value, and
- the second mode is a mode in which the upper limit value is a second command value larger than the first command value.
A non-transitory computer readable storage medium storing a computer program for causing a computer to execute control of an electric motor that drives a hydraulic pump for supplying hydraulic oil to a working device, the computer program causing the computer to execute:
- selection processing of selecting a control mode of the electric motor from a first mode and a second mode,
- wherein:
- the first mode is a mode in which an upper limit value of a torque command value indicating torque to be output by the electric motor is a first command value, and
- the second mode is a mode in which the upper limit value is a second command value larger than the first command value.
Dependencies are inferred from the claim text.