Vehicle Dynamics Analysis and Road Rest of a Sports Utility Vehicle Equipped with Hydraulically Interconnected Suspension

Abstract

Abstract: A new type of hydro-pneumatic interconnection suspension was proposed herein, which would contribute to improve the ability of rollover resistance without affecting other performances. In order to study the hydraulically interconnected suspension's impaction on the vehicle steering stability, based on CarSim/Simulink/AMESim cosimulation platform, a vehicle multi-body dynamics model coupled fluid system with hydraulically interconnected suspension systems was employed and the relevant handling stability and ride experimental simulation studies were made. The simulation results show that the vehicle fitted with hydraulically interconnected suspension systems may obtain the higher scores in the handling stability evaluation. In order to verify the accuracy of the cosimulation platform and ongoing study the influences of hydraulically interconnected suspension of vehicles, a hydraulically interconnected suspension was designed for a sports utility vehicle, and a series of road tests were carried out. The experimental results are good agreement with the simulation ones. It illustrates that the cosimulation model is correct, and provides a new computer simulation method for follow-up design and optimization in this kind of suspension. Experimental and simulation results show that hydraulically interconnected suspension may offer larger roll stiffness, enhance the safety of vehicle when cornering at high speeds, and improve the handling stability of vehicles without affecting the ride comfort.

Key words: handling stability, hydraulically interconnected suspension, rollover resistance, cosimulation

摘要： 提出一种新型油气互联悬架，用于替代传统车辆所使用的稳定杆，在基本不影响车辆其他性能的前提下有助于提高抗侧翻性能。为研究该悬架对某型SUV车辆操纵稳定性的影响，搭建了基于CarSim/Simulink/AMESim的联合仿真平台，建立了液压互联悬架的整车机液耦合的多体动力学模型。仿真结果表明，装有液压互联悬架的整车在操纵稳定性评价中得分较高。为了验证该仿真平台的正确性和进一步研究该油气互联悬架对车辆性能的影响，基于某型SUV车辆开发了整套油气互联悬架样车，并进行了路试。实验结果与仿真结果吻合较好，从而验证了仿真平台的正确性，为后续该类悬架的设计和优化提供一种新的计算机仿真方法。实验和仿真结果表明，在不影响车辆舒适性的前提下，液压互联悬架能提供较大的侧倾刚度，增强高速转弯时车辆的安全性，提高车辆的操纵稳定性。

关键词: 操纵稳定性, 液压互联悬架, 抗侧翻, 联合仿真

CLC Number:

U463.1

Peng Peng, Zhang Bangji, Zhang Jie, Zheng Minyi, Zhang Nong, . Vehicle Dynamics Analysis and Road Rest of a Sports Utility Vehicle Equipped with Hydraulically Interconnected Suspension[J]. China Mechanical Engineering.

彭鹏, 张邦基, 章杰, 郑敏毅, 张农, . 装有液压互联悬架的某型SUV车辆动力学分析及路试验证[J]. 中国机械工程.

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