Optimal Design Of The Multi-link Front And Rear Suspension And Vehicle Handling And Stability Analysis To A Sedan

Vehicle handling and stability is one of the main performance, suspension K&C characteristics have a major impact on the handling and stability. In this paper, new models of domestic chassis tuning of a project for the suspension hard points, coordinates, and the suspension bushing stiffness characteristics of the relationship between K&C as well as vehicle handling and stability of its study of the effects.Use of Jilin University, State Key Laboratory of Automobile Dynamic Simulation of self-developed suspension K&C characteristics of the test bench on the standard front and rear suspension K&C Performance Test. In ADAMS/Car module, the establishment of a target vehicle front suspension, rear suspension model. And in marked cars on the K&C characteristics of the slope as the goal, in the ADAMS/Insight, the target vehicle before and after the suspension hard points in the overall sensitivity analysis. According to sensitivity analysis, the choice of vehicle operation stability of the larger toe angle, camber and tire wear on the tread and wheelbase influential four parameters for the design objectives, select the more sensitive the more hard spot optimized. By adjusting the suspension hard-points method, to achieve the target vehicle with the standard car K&C characteristics curve fit the purpose.The hard-point optimization, the front suspension K&C characteristic curve with the higher degree of standard vehicle fit. Then suspension to be further optimized. From the elastic kinematics point of view of bushing stiffness of the suspension K&C Properties. In ADAMS/Insight,9 on the rear suspension bushing stiffness of 54 overall sensitivity analysis. According to sensitivity analysis, the selection of the toe angle, camber angle and tread and wheelbase four parameters as design objectives, select a greater impact on the design goals of bushing stiffness optimization. Optimized prior to the discovery beam angle, camber, tread, wheelbase range of variation are to a certain degree of improvement. Toe angle which the highest degree of improvement.In Carsim, the establishment of a target vehicle model before and after optimization.In accordance with national standards, on the vehicle model before and after optimization of the operational stability test. And with reference to "limit vehicle handling and stability indicators and evaluation methods" to evaluate the results of the simulation points, the optimal handling and stability of target vehicles slightly higher than that before optimization, and to some extent, reduce tire wear. Through this research, the suspension system provides a reference for the design of modern car chassis tuning, suspension design, development and performance evaluation have important guiding significance.