Based on the theory of multi-body dynamics system

an accurate model for a sports utility vehicle Sedan’s double wishbone independent front suspension is established. The changing rule of the suspension positional parameters with the wheel travel are analyzed. Besides

to improve the vehicle handling stability

it analyzed the sensibility of the suspension hard-points with the changing of the suspension positional parameters

and optimized some hard-points of the suspension. As a result

compared with the experimental data of the target vehicle

the performance of the automobile suspension was improved. Finally

as a kind of reference for suspension design

some general regular patterns about the effects of suspension stick arrangement on the properties of double wishbone front suspension were summarized.