Method for designing McPherson suspension

Abstract

The invention aims at providing a method for simply designing a McPherson suspension. The method comprises the following steps: firstly, establishing a coordinate system; then, obtaining hard point position parameters of connecting positions of each component in the McPherson suspension such as the shock absorber upper point, the tire grounding point, the control arm outer point and the control arm front point or back point and the like through measurement or calculation; carrying out calculation according to the parameters to obtain an equation of a main pin axial line and a control arm axial line; calculating the coordinates of an instantaneous rotation center through setting a first auxiliary line on the basis; and then, calculating the side inclination center height through setting a second auxiliary line. Thereby, the hard point positions of the connecting positions of each component in the McPherson suspension can be regulated according to the design requirements, and the side inclination center height of the McPherson suspension can be regulated. The method for designing the McPherson suspension of the invention has the characteristics of low threshold, convenience, accuracy and the like, is suitable for being used in the development work of the McPherson suspension, and can improve the developing speed.

Description

technical field [0001] The invention belongs to the technical field of automobile manufacturing, and in particular relates to a method for designing a MacPherson suspension. Background technique [0002] At present, the front suspension of many cars adopts McPherson suspension. This suspension has the following advantages: 1. The unsprung mass is small, which is beneficial to improve the ride comfort of the car; 2. The lateral occupation position is small, which is convenient for the engine to lower the center of gravity. Improve the driving stability of the car; 3. It is easy to realize the steering of the driving wheel; 4. The cost performance is high. [0003] The height of the roll center is one of the important performance indicators of the automobile suspension system, which directly affects the body roll angle when the vehicle is turning. Reasonable matching of the front and rear roll center heights is conducive to ensuring the safety of the car. In the design stage ...

AI Technical Summary

Problems solved by technology

In the design stage of the car, the height of the roll center of the car must be known. The traditional design method is to solve the roll center height of the McPherson suspension through the drawing method. With the development of dynamic theory, the more popular method is to solve the roll center height of the suspension by establishing the entire suspension model in the multi-body dynamics software, which requires a strong professional knowledge and software level of application engineers. Modeling is also time consuming

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