Multi-way valve for medium-sized excavator and control method

By using a single-valve-core, single-port decoupling architecture and closed-loop control of the electro-hydraulic actuator, the problems of uneven flow distribution, low control accuracy, and insufficient system integration in the hydraulic multi-way valve system of medium-sized excavators are solved, achieving high efficiency, energy saving, stable operation, and adaptability to a wide range of working conditions.

CN122148609APending Publication Date: 2026-06-05YANTAI EDDIE HYDRAULIC TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YANTAI EDDIE HYDRAULIC TECH
Filing Date
2026-03-09
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

The existing hydraulic multi-way valve system for medium-sized excavators has shortcomings such as uneven flow distribution, affected control accuracy, poor adaptability to working conditions, and low system integration, resulting in problems such as stuttering, high energy consumption, and frequent malfunctions.

Method used

It adopts a decoupled architecture with a single valve core and a single oil port, independent closed-loop control of the electro-hydraulic actuator, and an integrated dynamic confluence and energy recovery oil circuit design to achieve independent control and energy recovery of the hydraulic actuator. The valve core displacement is precisely controlled by the built-in proportional drive unit, displacement sensor and closed-loop controller of the electro-hydraulic actuator, and the oil supply flow is optimized by the dual pump confluence logic.

Benefits of technology

It improves control precision and the smoothness of complex actions, enhances system energy utilization and operational stability, expands the range of working conditions adaptable, reduces failure rate and maintenance difficulty, and adapts to the needs of different operating scenarios.

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Abstract

The present application relates to the field of hydraulic transmission and control technology of engineering machinery, disclose a kind of multi-way valve and control method for medium excavator, to solve the problem of traditional multi-way valve inlet and return coupling, flow distribution inflexible, low control precision, high energy consumption.The multi-way valve includes parallel left valve body and right valve body, and the inlet and return of the actuator is controlled by independent single valve core, breaking the coupling relationship of traditional four-way spool;Core working valve core is matched with electro-hydraulic actuator, and independent closed-loop control of valve core displacement and flow is realized by built-in displacement sensor;Valve body integrates double pump dynamic confluence, boom oil regeneration, arm differential regeneration cut-off, straight walking anti-deviation oil path.The present application has high control precision, good composite action smoothness, system energy utilization rate and strong working condition adaptability, high integration, reliable operation, suitable for medium excavator batch promotion and application.
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