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5 Results and Discussion
Vehicle pulling problem observed in the vehicles was a major concern in terms of
safety hence detailed analysis was required to find the rootcause and identify a corrective action for its rectification. In this study, we have demonstrated the procedure used
to identify the vehicles with the pulling issue. Effect of wheel alignment parameters
on the vehicle pull is also checked and conducted subjective vehicle tests to identify
effect of tire on vehicle pulling.
Wheel alignment being one of the possible cause, we analyzed the alignment
values for the vehicles and compared those with the design specifications. However,
wheel alignment data analysis for the vehicles with the pulling shows no conclusive
trend.
Based on the subjective study conducted, it can be concluded that the effect of
pull is caused because of tire.
References
1. Blundell M, Harty D (2014) The multibody systems approach to vehicle dynamics, pp 1–741
2. Gent AN, Walter JD (2006) United States and University of Akron. The pneumatic tire
3. Muthu Siva Sankar T, Sankarganesh P, Amarnath SKP, Becker P (2011) Prediction of tread
geometry influence on Ply steer Residual Aligning Torque (PRAT). SIMULA India Regional
Users Meeting
4. Manual of Specifications & Standards (2010) Planning commission government of India New
Delhi, IRC: SP: 73-2007
5. Gillespie TD Fundamentals of Vehicle Dynamics. University of Michigan-Ann Arbor, 1992-0201, SAE International
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