Adjustable damping valve device with emergency operating valve

CN121782310APending Publication Date: 2026-04-03ZF FRIEDRICHSHAFEN AG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-29
Publication Date
2026-04-03

AI Technical Summary

Technical Problem

In the event of a power outage, the damping force characteristic curve of the adjustable damping valve device cannot meet the desired requirements, and the design of emergency operation valves in the prior art lacks flexibility and the overpressure protection measures are not perfect.

Method used

By hydraulically connecting the overpressure valve in parallel with the pilot valve and placing the overpressure valve on the main valve body, a simple outflow channel is designed to achieve overpressure protection and maintain normal operation of the device in emergency situations.

Benefits of technology

It provides greater design freedom, ensures reliable operation of the damping valve device under emergency conditions, protects the device from damage under overpressure conditions, and simplifies the valve housing structure.

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Abstract

The invention relates to an adjustable damping valve arrangement comprising a pilot valve which is actuated by means of an actuator for actuating a main stage valve, in which an emergency operating valve body is switched from a normal operating position to an emergency operating position when the power supply of the actuator is interrupted, the pilot valve is hydraulically connected in parallel with an overpressure valve which opens when the power supply is interrupted and an overpressure condition occurs in the damper valve arrangement.
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Citation Information

Patent Citations

  • Adjustable vibration damper with an emergency operating valve

    DE102009002582A1

  • Adjustable damping valve device

    DE102010063386A1

  • Adjustable damping valve device

    DE102015200348A1