Mcpherson Suspension In The Wheels Turning And Beating Motion Analysis And Steering Tie Rod Disconnected Point Optimization

Suspension system is a key part for cars, and has decisive effect on car drivability, stability, and comfortability. Because of its characteristics of simple structure, low cost and space economy, Macpherson suspension has become the most popular independent suspension since its emergence. Hence, the kinematic analysis of Macpherson suspension has great significance.In this paper, the dimensional positions of points on the left Macpherson suspension while the front left wheel turns and jumps are calculated with the method of dimensional coordinate transformation. The kinematic performance of the Macpherson suspension on a real vehicle is studied, and the changes of the front wheel alignment and the motion of the front wheel in the longitudinal and the transversal directions are figured. Based on the requirements of general layout, a constrained optimization design model is set up with the steering cross rod ball joint position as the optimization variables (design parameters), and the sum of steering cross rod length interference while the left front wheel turning and bouncing as the objective function. And the optimization results are worked out by programming on computer. The difference between the optimized and the original design is figured out. The results indicate that the modeling method in the paper is practical.