Hydraulic systems, work vehicles, control methods, and computer programs
The hydraulic system addresses sudden pressure fluctuations by using a sensor and processing unit to generate torque commands, ensuring stable motor operation and reducing damage and discomfort.
JP2026095974APending Publication Date: 2026-06-12KUBOTA CORP
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- KUBOTA CORP
- Filing Date
- 2024-12-02
- Publication Date
- 2026-06-12
AI Technical Summary
Technical Problem
Sudden hydraulic pressure fluctuations in hydraulic systems cause load fluctuations on electric motors, leading to overshoot or undershoot in motor output, damaging the hydraulic pump and causing operational discomfort.
Method used
A hydraulic system with a sensor to detect pressure fluctuations, a processing unit to generate torque command values based on both motor rotational speed and pressure, and a drive circuit to control the electric motor, ensuring appropriate motor control even during sudden pressure changes.
Benefits of technology
The system effectively mitigates damage and discomfort by quickly responding to pressure fluctuations, maintaining stable motor operation and reducing overshoot.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 2026095974000001_ABST
Abstract
This technology provides the ability to properly control the electric motor that drives the hydraulic pump. [Solution] The hydraulic system S disclosed herein comprises a hydraulic pump 32, a supply oil passage 58 that supplies hydraulic fluid from the hydraulic pump 32 to a hydraulically operated front loader 4, a pressure sensor 36 that detects the hydraulic pressure in the supply oil passage 58, a pump motor 30 that drives the hydraulic pump 32, a drive circuit 22a that controls the pump motor 30 by control commands based on torque command values, and a processing device 18 that performs generation processing to generate torque command values based on the rotational speed of the pump motor 30 and the output of the pressure sensor 36.
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