THE EFFECT OF SUSPENSION GEOMETRY ON A VEHICLE RIDE CHARACTERISTICS DURING DECELERATION AND ACCELERATION

Document Type : Original Article

Author

Associate Professor, Dept. of Mechanical Engineering, Faculty of Eng. & Technology, El-minia University, El-minia, Egypt.

Abstract

In designing a modern vehicle, some factors have to be considered. The most significant one, in so far as its long term effects are most profound and widespread such as the transverse-engined(front-wheel-drive) concept. Concomitant with this concept was the realization that the resulting low polar moment of inertia would give, when fitted with conventional suspensions, a high pitch frequency or "small-vehicle ride". The object of this paper is to demonstrate the effects of the suspension geometry on the vehicle pitch and bounce attitudes during braking or acceleration. Two degree of freedom models of a vehicle are employed herein. The steady-state positions in both pitch and bounce are developed for linear systems of typical suspensions that may be either conventional or coupled systems. The results indicate that the rear suspension system makes very significant contribution to the anti-dive properties of either conventional or coupled. suspension systems.

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