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Effects of road roughness on vehicular rolling resistance
A linear model for evaluating the influence of road roughness on total vehicular rolling resistance is presented. This model considers rolling resistance to be the result of three energy dissipation mechanisms: (a) smooth-surface rolling losses, (b) energy dissipation in the tire due to road...
Development, implementation, and application of the reference quarter-car simulation
An analysis of longitudinal road profile called the reference quarter-car simulation (RQCS), described in National Cooperative Highway Research Program (NCHRP) Report 228, has been applied in a number of research projects and was recently selected as the basis for an international roughness index...
Influence of front-wheel drive on vehicle handling at low levels of lateral acceleration
The various mechanisms which cause a front-wheel drive vehicle to exhibit levels of linear understeer unique to this drive configuration are examined and scaled with respect to their relative magnitudes. Expressions defining the influence of drive-shaft torque on understeer gradient are derived in...
Traction modifications resulting from test-induced treadwear
Measurements have shown that the traction performance of pneumatic tires can be profoundly influenced by wear which accrues during the testing process. These findings indicate that changes can occur in the shear forces generated at both high and low slip angles as a consequence of testing at high...

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