关键词: 单纵臂悬架；车轮定位参数；硬点优化；Adams

Abstract: Trailing arm suspension has the advantages of simple structure, high strength and large suspension stroke, etc., usually applied to the rear suspension of off-road vehicles, due to its unique structural characteristics, the caster angle of the kingpin of the trailing arm suspension and the wheel camber angle change less in the driving process, but the caster angle of the kingpin often changes greatly in the wheel jumping process, and the hard point parameters usually need to be optimized. Based on the rear suspension parameters of a certain type of off-road vehicle, a virtual prototype model of the rear single trailing arm suspension is established in the Adams/Car software, and the variation of the wheel alignment parameters is analyzed through the simulation of parallel wheel jumping in the same direction. In order to solve the problem that the caster angle of the kingpin is too large in the process of wheel jumping, the Adams/Insight module is called to optimize the caster angle of the kingpin and the camber angle of the wheel, and the hard point is optimized. The optimized caster angle of the kingpin is generally reduced by about 5°in the allwheel jump stroke, and the lateral displacement of the wheel landing point and the change of toe angle are also more reasonable, and the handling stability of the vehicle is improved.

Key words: single arm suspension; wheel alignment parameters; optimization of hard points; Adams