Research on affect of mcpherson suspension king pin position for performance

LI Ning， WANG Hai-gen， ZHENG Jie， YUAN Lin-jiang
（Zhijiang College， Zhejiang University of Technology， Hangzhou 310024， China）

Abstract： 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%，low，high speed vehicle returnability deviation are 5.83%，12.11%.
Key words： king pin； aligning torque； aligning capability； pneumatic trail