Hydraulic control system and working machine

By introducing a valve core drive motor and a mechanical connection transmission structure into the hydraulic multi-way valve group, combined with CAN bus communication and a load-sensitive variable pump, the problems of slow response and low accuracy of the hydraulic multi-way valve group are solved, and high-precision, high-response valve core displacement control and flow distribution are achieved.

WO2026107914A1PCT designated stage Publication Date: 2026-05-28ZOOMLION EARTHMOVING MASCH CO LTD +1
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
ZOOMLION EARTHMOVING MASCH CO LTD
Filing Date
2024-12-20
Publication Date
2026-05-28

AI Technical Summary

Technical Problem

Existing hydraulic multi-way valve groups suffer from problems such as slow response, low accuracy, and poor stability in valve core control. In particular, it is difficult to achieve precise control when hydraulic pressure fluctuations and valve core displacement cannot be detected in real time.

Method used

The system employs a valve core control module, including a valve core drive motor and a mechanical connection transmission structure. The motor drives the reversing valve core, and combined with CAN bus communication, it achieves high-precision and high-response valve core displacement control. A load-sensitive variable pump and an electro-proportional pressure reducing valve are added to optimize flow distribution.

Benefits of technology

It achieves high-precision and high-response control of hydraulic multi-way valve groups, avoids hydraulic buffering and pressure overshoot, ensures control stability and smoothness, and can accurately detect and control valve core displacement.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application belongs to the field of working machines. Disclosed are a hydraulic control system and a working machine. The hydraulic control system is applied to a plurality of actuators and comprises a hydraulic multi-way valve group, which comprises a plurality of valve group sections used for respectively controlling the actuators and arranged in parallel, each valve group section being provided with a valve core control module, and the valve core control module comprising a valve core driving motor used for driving a reversing valve core of the valve group section to move; and a controller, electrically connected to the valve core driving motors and used for controlling the displacement of the reversing valve cores. In the present application, each valve group section of the hydraulic multi-way valve group is provided with a valve core control module and, by means of a transmission mode of motor driving combined with mechanical connection, the valve core driving motor of the valve core control module can push the reversing valve core to generate displacement, so as to achieve high-precision valve core displacement control, thereby accurately controlling hydraulic flows distributed to the plurality of actuators.
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Citation Information

Patent Citations

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    CN101502884A

  • Hydraulic system with different-accessory-flow adjusting function

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  • Load-sensitive multi-way valve with load ports independently controlled and hydraulic system

    CN113931893A

  • Multi-way valve, hydraulic system and engineering machinery

    CN114607656A

  • Modularized multi-way valve and oil way system thereof

    CN117780706A