Thesis in M.E.
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Item Analytical and Experimental Analysis of Wheel Alignment System for Light Vehicle(CUET, 26-Sep-2023) Das, Riton KumerWheel alignment is an important factor that influences the performance of automotive vehicles. This study experimentally investigated the effects of wheel alignment, especially front wheel toe angle, tire pressure, vehicle load, and brake application, on fuel consumption and tire travel life for two different models of light vehicles. According to the analysis, the vehicle's wheel started to become out of alignment when its travel distance increased over time. It is observed that vehicle wheels became out of alignment due to changes in different factors, including vehicle load, road condition, brake application, tire pressure, suspension condition, etc. The experimental findings also demonstrate that a number of variables, including engine rpm, rolling resistance, energy consumption, fuel consumption, and tire wear of the vehicles, are strongly correlated with front wheel toe angles, tire pressure, vehicle load, and brake application. The test result shows that the increase in rolling resistance and energy consumption led to an increase in fuel consumption, tire wear rates, and travel costs. It is found that due to the misalignment of the front wheel toe angle, the car travels about 4.77 km (for left toe-in, 2.53°), 5.12 km (for left toe-out, -2.53°), 7.37 km (for total toe-in, 5.06°), and 7.63 km (for total toe-out, -5.06°) less for the same amount of fuel, and the KPL reduction rate is up to 38.22%, 42.24%, 73.99%, and 79.31%, respectively. In comparison to the front wheel's left toe-in angle, the fuel consumption rate is 4.02% higher at the front wheel's left toe-out angle. Additionally, it is found that when both wheels are at a toe angle, fuel consumption is a little bit higher. In the second experiment, the effect of tire inflation pressure on the fuel performance of a light vehicle at a front wheel total toe angle of 0.00°, 1.44° (toe-in), and -1.44° (toe-out) is investigated. The experimental finding shows that when tire pressure changes from over-inflated to under-inflated while maintaining a constant front wheel toe angle, the vehicle's engine rpm, rolling resistance, energy consumption, fuel consumption, and travel cost rates increase. In comparison to a total toe angle of 0.00°, a front wheel total toe-in angle of 1.44° results in a 3.62% increase in fuel consumption, while a front wheel total toe-out angle of -1.44° results in a 4.63% increase. In the third experiment, a Toyota Echo Plus-2ZZ-GE-02 light-duty vehicle is used to investigate the effect of vehicle load on fuel performance. It is revealed that when the vehicle load rose from low to high while