One of the aspects of vehicle performance is performance of steering geometry. Steering geometry parameters kingpin inclination angle, caster angle, camber angle, toe angle, scrub radius, toe in and toe out are measured using alignment techniques and caster/camber gauges. Suspension system components pivot upon a rubber bushing which is compressed between an inner and outer metal sleeve. Excess clearance developed in the joints of suspension system in turn causes changes in steering geometry. This is obviously essential for any automobile for a major challenge in terms of operation, performance, servicing and maintenance. The Front suspension comprises of a linkage which is a 3 Dimensional mechanism RSSR (Revolute, Spherical, Spherical, Revolute paired). Steering performance depends on the appropriateness of spherical bushes located at various joints. Steering performance depends on the position of kingpin axis. Depending on the position of kingpin axis, kingpin angle, caster angle, camber angle, toe angle and scrub radius of a vehicle are decided.These measured angles are supplied to interfacing program which calculates the steering performance parameters.
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