멀티링크 현가장치의 선회 복원성 향상에 관한 연구

In this paper, we discuss the design parameters concerned with self-aligning characteristics in the multi-link suspension system during cornering maneuver. We show that the self-aligning mechanism, which is mainly governed by kingpin offset, of the multi-link suspension system is some what different from that of the conventional one. In conventional system which has the fixed kingpin axis, caster trail is the design parameter to adjust kingpin offset, but we can not use caster trail exclusively to set kingpin offset because it is related to generate lateral tire force as well as longitudinal one. We introduce another design parameter to set kingpin offset independently in the multi-link system which has the moving kingpin axis. The results of computer simulation using a ADAMS half car quasi-static model with compliance show that we are able to control kingpin offset independently by the design parameter introduced above. Also, the results of another ADAMS simulation using the model for the car under mass production show that we can modify the multi-link suspension system in order to improve self-aligning characteristics while all other characteristics keep nearly the same as they were.