关键词: 动力转向, 转阀, 正交试验, 助力性能

Abstract:

In order to analyze the assist performance of a rotary valve hydraulic power steering system,a co-simulation model of the hydraulic power steering vehicle was established in AMESim and LMS Virtual.Lab Motion software.With the evaluation index of steering efforts and “road feel”,orthogonal test was carried out based on this model to identify the efforts of the power steering system's flow rate,the rotary valve orifice size and the torsion bar stiffness on the system's assist performance.The results show that the flow rate has the biggest impact on the steering effort and the torsion bar stiffness is the most important parameter for the “road feel”.What's more, “road feel” of the steering system is obviously increased after orthogonal optimization.

Key words: power steering system, rotary valve, orthogonal test, assist performance