Manufacturing Tolerance Impact on the Four Wheel Alignment Parameters of Multi-link Rear Suspension

In this article, the multi-link rear suspension of a certain vehicle model was taken as the research object. Based on Monte Carlo Method, the three-dimensional tolerance model of multi-link rear suspension was established in 3DCS. The deviation of four-wheel positioning parameters were analyzed, and also, critical impact factors were identified. The virtual prototype of multi-link rear suspension was established in ADAMS. Then, the safety of toe angle adjustment was verified. The results show that the Y direction adjustment of eccentric bolt of lower pendulum arm in Y direction is within the range of −4 to 4 mm, which can meet the requirements of toe angle adjustment. The toe and camber are approximately linear with the adjustment of the lower arm mounting in Y direction. Further more, the influence of toe adjustment on camber is small.