Design and Analysis of suspension system components

Mechanical engineering

Normally in automobile Mac-pherson strut type suspension system is used. In this the spring and damper system is attached directly to the knuckle’s upper part via strut rod. The other end of the suspension must be connected to chassis. So, the overall height of the assembly increases. This increases the centre of gravity of car thus decreasing in performance. Pushrod and pull rod suspension systems are used in F! cars and High-performance Sports car, where centre of gravity plays an important role. This type of suspension system also reduces the unsprung mass of the vehicle. The unsprung to sprung mass ratio must be small. Polar moment of inertia of the vehicle should be small i.e. the mass should be concentrated as near to the centre of gravity as possible. The suspension system is designed by first quarter car model, then half car model and then full car model consisting of all the four wheels. Pull rod system is incorporated in front and Pushrod system at rear. Components are designed for both the static and dynamic conditions considering fatigue life also.

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