Thiyya Kkandiyil, S., Gowda, M., and Venna, H., "Influence of Steering Axis Inclination and Scrub Radius on Steering Effort of Passenger Car," SAE Technical Paper 2016-28-0177, 2016, doi:10.4271/2016-28-0177.
Vehicle dynamics is one of the important domains in the automotive field. It is the study of performance, ride and handling of the vehicle. The design of steering system, suspension system and front axle plays an important role in achieving good ride and handling characteristics of the vehicle. The wheel geometry is one of the suspension parameter that affects handling characteristics of the vehicle. Hence proper selection of wheel geometry angles such as caster, camber, toe, steering angle inclination and scrub radius plays an important role in suspension design. In this thesis work study has been conducted to analyze the influence of steering axis inclination and scrub radius on steering effort of passenger car. This study helps in selecting proper steering axis inclination and scrub radius with a goal of achieving lesser steering effort. Multi body dynamic model of selected passenger car has been built using ADAMS Car. Single lane change and braking in turn analysis has been conducted to study the effect of changing steering axis inclination and scrub radius on steering effort. Most suitable combination of steering axis inclination and scrub radius has been selected by performing design of experiments (DOE) using ADAMS insight. Four levels of design of experiments (DOE) has been performed in which steering axis inclination is varied from -1.4 deg to 17.70 deg and scrub radius is varied from -32.66 mm to 98mm. 10.67 deg steering axis inclination and positive scrub radius of 15.11 mm is selected by performing DOE Study.