Influence of Key Parameters of Hydraulically Interconnected Suspension on Vehicle Dynamics and Experimental Validation

Publication Type:
Journal Article
Citation:
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering, 2017, 53 (14), pp. 39 - 48
Issue Date:
2017-07-20
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© 2017 Journal of Mechanical Engineering. The hydraulically interconnected suspension system plays a significant role on improving vehicle safety, handling performance, which implies the importance of the study of the key parameters of the suspension system on vehicle dynamics. With a sports utility vehicle as the application object, an hydraulic suspension system with anti-roll interconnection mode is introduced, the vehicle state variables are transferred to the hydraulic system on the mechanical and hydraulic coupling surface, then the gas volume in the accumulators are changed which affects the oil pressure in the hydraulic circuits, hence the forces and torques on the coupling surface are updated. The forces and torques are introduced to the vehicle dynamic model to propose a new model with vehicle and hydraulic suspension interacting. The new vehicle model is verified with experimental results to testify its effectiveness on further vehicle response analysis. Then the slalom test is chosen to analyze the influence of the key parameters of the hydraulic suspension system on the vehicle dynamic responses. The results show that the amplitude of the roll angle and the left-rear tire force on z-axis have negative correlation with the oil pressure, the area difference and ratio of the two chambers of the actuators, and positive correlation with the volume of the accumulators; the key parameters have little influence on the peak values of the lateral acceleration. With the consideration of the experimental costs and periods, relative experiments are conducted to validate the above mentioned conclusions.
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