Vehicle balance problems must be diagnosed using the connection between SAI (Steering Axis Inclination), TOOT (Turning Radius Angle), and included angle. The SAI is the angle made by a vertical straight drawn through the middle of the wheel and the steering axis. As far as I know, the angle made by the kingpin axis and a line perpendicular to the earth is known as TOOT. The angle created by the intersection of the two steering axis is the last component of the included angle. Thus, inadequate alignment of these inclinations can result in various turning and chassis problems, including uneven wear on tires, steering pull, and improper handling.
My colleagues and I are taught to quickly identify and fix misalignment issues if they know the connection between SAI, TOOT, and included angle. For instance, extreme positive curvature caused by a high SAI angle can lead to uneven side tire degradation. On the other hand, If the SAI attitude is too low, it could trigger negative camber, forcing the interior edges of the tires to degrade faster. It is possible to modify the inclination perspective and ensure equal wheel degradation by determining the SAI attitude and finding the right range for the car’s configuration. Excessive steering may result from a great TOOT angle, leading to extensive tire abrasion and degradation (Balakina et al., 2022). On the other hand, unstable handling can result from a minor TOOT angle. Therefore, technicians may identify the right range for the car and make necessary adjustments by calculating the abovementioned angle.
Finally, keeping correct handling and chassis geometry depends on the encompassed angle. Numerous chassis design factors, including wheel radius, handling geometry, wheels, and steering components, impact vehicle protection characteristics. Undoubtedly one of the crucial jobs for maintaining vehicle trajectory equilibrium is investigating management factors (Balakina et al., 2022). If the included inclination is not within the suggested spectrum, it may lead to extensive tire degradation and rough handling. Technicians can guarantee the correct positioning and control of the car by calculating the included angle, changing the camber position, and adjusting other chassis parts. Thus, detecting and fixing vehicle alignment problems requires knowledge of the connection between SAI, TOOT, and encompassed angle. By monitoring these ratios and correcting them as required, technicians can maintain even tire degradation, correct steering, and pleasant driving conditions for the vehicle’s owner.
Reference
Balakina, E. V., Kochetov, M. S., & Sarbaev, D. S. (2022). Assessment of the Influence of Inclined Wheel Installation on the Vehicle Lateral Stability. In Proceedings of the 7th International Conference on Industrial Engineering (ICIE 2021) Volume I 7 (pp. 100-108). Springer International Publishing. Web.