Suspension actuator integrating electromagnetic, hydropneumatic, and inerter characteristics, and control method therefor

By integrating electromagnetic, hydropneumatic, and inertial capacitance characteristics into the suspension actuator, and combining hydropneumatic springs, controllable damping, and hydraulic inertial capacitance, efficient control and energy consumption reduction of the suspension system are achieved. This solves the problems of real-time adjustment and high energy consumption in existing suspension systems, and improves the vehicle's driving performance and reliability.

WO2026113431A1PCT designated stage Publication Date: 2026-06-04JIANGSU UNIV
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Patent Information

Application Number
PCT/CN2025/107257
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-11-28
Filing Date
2025-07-07
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Existing suspension systems cannot adjust suspension operating parameters in real time, resulting in insufficient vehicle driving performance. Furthermore, electromagnetic actuators have high energy consumption, low fault tolerance, and poor vibration isolation. The integrated design of hydraulic inertial container and oil-gas spring has low space utilization and reliability.

Method used

The suspension actuator, which integrates electromagnetic, hydropneumatic, and capacitive features, broadens the suspension control bandwidth by combining a guide rod structure with hydropneumatic springs, controllable damping, and hydraulic capacitive force. It also achieves passive, semi-active, and active operating modes through electromagnetic coils and piezoelectric crystals, and adjusts the damping and electromagnetic active force.

Benefits of technology

It improves the response speed and control bandwidth of the suspension system, reduces energy consumption, enhances system reliability and vibration isolation performance, optimizes spatial layout, and adapts to various vehicle driving conditions.

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    Figure CN2025107257_04062026_PF_FP_ABST
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Abstract

A suspension actuator integrating electromagnetic, hydropneumatic, and inerter characteristics, and a control method therefor. The actuator comprises a piston rod, a guide rod, a spiral groove sleeve, a stator core, and a straight rod; a controllable damping valve assembly is provided in a piston; the bottom end of the piston rod is connected to the piston; the top end of the guide rod passes through the piston and extends into the interior of the piston rod; a spiral groove is formed in the inner circle surface of the spiral groove sleeve; an electromagnetic coil is embedded in a groove of the stator core; the stator core is fixed to the spiral groove sleeve / piston rod; the outer circle surface of the straight rod is sleeved with a permanent magnet; the straight rod is fixed to the piston rod / spiral groove sleeve; damping holes are machined in the piston in the axial direction; the piston rod, the piston, and the stator core divide the interior of the actuator into an upper cavity, a middle cavity, and a lower cavity. By energizing the electromagnetic coil and the controllable damping valve assembly, the suspension can operate in three modes, namely, a passive mode, a semi-active mode, and an active mode. The suspension actuator of the present invention has electromagnetic, hydropneumatic, and inerter characteristics at the same time, thereby widening suspension control bandwidth, and reducing the energy consumption of the electromagnetic system.
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Citation Information

Patent Citations

  • Adjustable inertial mass coefficient type inerter for heavy truck

    CN108488299A

  • Electromagnetic-type inertial device

    CN111089135A

  • Oil-gas suspension cylinder, oil-gas suspension system and vehicle

    CN116517999A

  • Electromagnetic suspension of vehicle and vehicle

    CN117656737A

  • Hybrid suspension actuator and suspension system

    CN118998245A