Structural Design and Performance Optimization of a New Inflatable Hydraulic-electric Energy Regenerative Suspension System

doi:10.3901/JME.260375

Abstract

Abstract: In order to solve the problem that the dissipated energy of the damping elements of the traditional suspension system for heavy duty vehicles is difficult to recover efficiently, especially under the vertical and large loads and complex driving conditions, a structural design method of Inflatable hydraulic-electric energy regenerative suspension (IHERS) system is proposed to meet the requirements of energy saving and comfort under long-distance transportation of vehicles. The damping characteristics and energy recovery characteristics are analyzed. Considering the body structure of HDV and the comfort of the cab, a five-degree- of-freedom half-car model with IHERS system is established. The working principle of the system under tension and compression conditions is expounded. The energy recovery power of the IHERS system is obtained based on Kirchhoff's law, and the damping force expression of IHERS under different working conditions is derived. The effects of piston diameter, piston rod diameter and hydraulic motor displacement on the amplitude and frequency characteristics of IHERS system in different frequency ranges are analyzed. Based on the vertical acceleration of the body, the dynamic stroke of the suspension and the dynamic load of the wheel, the fitness function is constructed, and the parameters of the IHERS system were optimized by genetic algorithm. The simulation results show that when the vehicle is driving on a C-level road 20 m/s, the energy recovery efficiency of the optimized IHERS system can be increased by up to 34.35%, and the vertical acceleration of the cab can be reduced by 47.96%, which significantly improves the vehicle ride comfort. The research provides a theoretical reference for the development needs of electrification and energy saving of heavy-duty vehicles.

Key words: vehicle suspension, energy recovery, vertical vibration, damping force, parameter optimization

CLC Number:

U463.33

ZHANG Buyun, WANG Xiang, LUO Minglu, WANG Yong, ZHANG Yunshun, XU Xing, TAN Chin-An. Structural Design and Performance Optimization of a New Inflatable Hydraulic-electric Energy Regenerative Suspension System[J]. Journal of Mechanical Engineering, 2026, 62(7): 244-254.

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