IIAE CONFERENCE SYSTEM, The 5th IIAE International Conference on Industrial Application Engineering 2017 (ICIAE2017)

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The Evaluation of Cornering Behavior of Low Floor Electric Bus: The Effect of Mass Distribution and Friction Coefficient
Ekalak Prompakdee, Pornporm Boonporm, Supakit Rooppakhun

Last modified: 2017-02-22

Abstract


The Low Floor electric bus, which had been promoted by the Government of Thailand, boost design technologies and research in the automotive industry. In order to fulfill the safety requirements regulated by the Department of Land Transport of Thailand, it must undergo both static and dynamic analysis. The vehicle dynamic cornering behavior plays an important role to demonstrate handling stability especially for active safety. In this paper, we study effect of the parameters of weight distribution and the road friction coefficient, which were indicated in terms of understeer gradient. The analysis had been conducted by ADAM CARS based on the vehicle’s multi-body model. The analysis was applied under steady state cornering conditions based on three front to rear weight distribution configurations in percent of 50/50, 45/55 and 40/60, and a lateral tire road friction coefficient of 0.5, 0.7 and 0.9. The results show that the greater the friction coefficient between road and tire, the better handling behavior. The trends are in the same fashion when the three weight distributions are varied and the 40/60 configuration has the smallest understeer gradient. But in the real design we should consider other behavior like ride performance and static analysis, so that the configuration of 45/55 is chosen in our real design.

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