Paper Number 2.2
A Study on the Influence of
Tire Properties
on SUV Rollover Using the Dynamic Simulation
of Fish-Hook Maneuvers
T. Y. Koo[1]
J. C. Kim
S. H.
Park
K. D. Sung
C. T. Cho
NEXEN Tire Corporation
30, Yusan-Dong, Yangsan-Si,
Email: hmpark@nexentire.com
Voice: (82) 55-370-5055
Fax: (82) 55-370-2313
The accidents of Sports Utility Vehicles (SUV) sometimes lead to vehicle rollover which
is defined as a vehicle rotation of 90 degree or more around
its longitudinal axis. Rollover crashes are significantly more fatal than
that in other types of crashes. In order to help consumers understand, National
Highway Traffic Safety Administration (NHTSA) proposed a rollover resistance
rating program which uses the Static Stability Factor (SSF) to determine the
rating. SSF is a vehicle design factor determined by the ratio of one half the
track width to the C.G. height. However there may be some other influences on
the rollover propensity such as tire and suspension characteristic properties.
Thus, in 2002, NHTSA published another notice to present a dynamic rollover
test procedure through the Fish-Hook maneuvers.
The aim of this study
is to analyze the influence of tire characteristic properties on the rollover
stability using a vehicle dynamic simulation technique. In order to investigate
the rollover propensity, the
multi-body vehicle dynamic model has been developed. The vehicle
dynamic model consisted of body, suspension, steering, power-train, brake,
tire, road, and driver subsystems. The whole vehicle parameters, each vehicle's
part parameter, part connecting elements such as spring, damper and
bush, and tire characteristic factors were measured by an experiment to
accomplish accurate rollover analysis. With the developed vehicle
dynamic model, a rollover analysis due to tire characteristic
factors, such as cornering stiffness and cornering force peak has been carried
out in accordance with the Fish-Hook test.