Indian Journal of Science and Technology

Abstract

A front wheel suspension system of a motorcycle is assigned to a quarter car model and from which one shock absorber is considered for the performance study. The deviations from the cycloidal rotation of the wheel are proposed and the vertical motion of the wheel with respect to the sinusoidal road surface is modelled by a polynomial equation and compared with the experimental data. To give deterministic impulses due to road profile, the adjustable bumps are angularly mounted on a variable eccentric cam which gives input motion to a shock absorber mounted upright above it and acting as follower to the cam. For the heavier loads the rebound of shock absorber reduces and displacement smoothens. There occurs a combination of speed range, load and road disturbances within which the vertical acceleration is within the standard limit.
Keywords: Quarter car model, shock absorber, road profile, curves generation by wheel.