Electric control prefill valve and control method thereof

By using a pressure sensor and solenoid valve to control the electronically controlled filling valve, precise adjustment of oil quantity and system protection are achieved, solving the problem of oil quantity changes after equipment replacement and improving the system's adaptability and reliability.

CN121976984APending Publication Date: 2026-05-05YUTAI HYDRAULIC TECH (SHANGHAI) CO LTD
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Patent Information

Application Number
CN202610310098.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-13
Publication Date
2026-05-05

AI Technical Summary

Technical Problem

When the external equipment is replaced, the oil volume or oil pressure requirement of the existing filling valve changes, requiring the replacement of internal parts or adjustment of the working oil port, which leads to increased costs and low work adaptability.

Method used

An electronically controlled filling valve is used, and the pressure of the main oil circuit is monitored in real time by a pressure sensor. The control unit automatically controls the opening and closing of the solenoid valve to accurately manage the filling and unloading process. Combined with upper and lower limit sensors and an overflow valve, it can achieve precise adjustment of oil quantity and system protection.

Benefits of technology

It improves operational adaptability, enhances energy utilization efficiency and response speed, strengthens system reliability and safety, reduces maintenance costs, and adapts to equipment with different oil volume requirements.

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Abstract

The invention relates to the technical field of fluid control, in particular to an electric control prefill valve and a control method thereof.The electric control prefill valve comprises a valve body, a priority valve, an electromagnetic valve, a pressure sensor and a selector valve, the valve body is provided with a main oil way, a prefill opening and an unloading opening, the priority valve, the electromagnetic valve and the selector valve are sequentially arranged along the main oil way and communicate with one another, and the prefill opening communicates with the priority valve; an oil return port of the electromagnetic valve is communicated with the unloading port; the pressure sensor comprises a lower limit sensor and an upper limit sensor; the sensing end of the lower limit sensor is communicated with the main oil way; the upper limit sensor is vertically arranged above the valve body, and the sensing end of the upper limit sensor is communicated with the main oil way. The hydraulic system has the advantages that the hydraulic system pipeline is simplified, the leakage risk is reduced, the hydraulic pressure at the working oil port can be adjusted according to the actual situation, and the energy utilization efficiency, the response speed and the reliability of the braking system are remarkably improved.
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