麦式悬架主销位置对性能影响研究

Research on affect of mcpherson suspension king pin position for performance

针对减振器上点定义不同对回正性能造成影响的问题,在ADAMS中建立了某车型的仿真模型,分别按照安装中心定义法、变形中心定义法对仿真模型中的减振器上点重新进行定义后,对主销内倾角和主销后倾角进行了仿真计算,并和实车测试进行对比,通过对比提出采用变形中心定义法计算的结果跟实际比较相符。在所建立的分析模型的基础上,对转向时由主销内倾角产生的回正力矩和主销后倾角产生的回正力矩进行了计算,并就两种定义方法对整车在低、高速时回正性能的影响进行了分析。研究结果表明,两种定义方法在转向时产生的回正力矩偏差,主销内倾角为4.28%,主销后倾角为0.33%,低、高速时整车回正性能偏差分别为5.83%、12.11%。

Aiming at the damper top mount to define difference effect aligning capability,an auto simulation model in ADAMS was established,the damper top mount of simulation model was redefined according to installing centre definition method and deformation center definition method,the king pin inclination angle,caster angle were calculated,and compared with the vehicle a test date.By comparing,the deformation center defined method was proposed more accordance with test date.Based on the analysis model,the aligning torque produced by king pin inclination angle and caster angle when steering were calculated,and influence to the vehicle returnability by two kinds of definitions were analyzed.The results indicate that two ways of defining the damper top mount generated aligning torque of deviation during steering,the king pin inclination angle is 4.28％,caster angle is 0.33％,1ow,high speed vehicle returnability deviation are 5.83％,12.11％.