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Transient Versus Steady-State Tire Rolling Loss Testing
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English
Abstract
A formula is developed for computing the energy loss per unit distance (or the “rolling loss”) of tires operating under transient conditions. The formula is applied to two transient test schedules - a warm-up test with constant speed and zero torque (free-rolling), and an urban driving test with rapidly varying speeds and braking/driving torques. Test results indicate that the average rolling loss during warm-up is 9%, and during urban driving, 26 to 47% higher than the steady-state rolling loss. Equipment problems associated with transient testing are indicated.
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Citation
Schuring, D., "Transient Versus Steady-State Tire Rolling Loss Testing," SAE Technical Paper 790116, 1979, https://doi.org/10.4271/790116.Also In
References
- Thompson G. D. Burgeson R. N. “Determination of Tire Energy Dissipation - Analysis and Recommended Practice” EPA Technical Report Emission Control Technology Division April 1978
- Schuring D. J. “The Energy Loss of Tires on Twin Rolls, Drum, and Flat Roadway - A Uniform Approach” SAE Paper 770875 September 1977
- Schuring D. J. “Rolling Resistance of Tires Measured Under Transient and Equilibrium Conditions on Calspan's Tire Research Facility” Calspan Report DOT-TSC-OST-76-9 March 1976
- Trivisonno N. M. “Nonsteady-State Rolling Resistance Using Tire Thermography Measurements,” Fall Meeting of Akron Rubber Group October 1978
- Bogdan L. “Results of Energy Loss Measurements on Passenger Car Tires Operating in the Free-Rolling and Braking-Traction Modes,” Calspan Final Report No. 6297-T October 1978
- Moore R. C. Hill F. W. “Tire Rolling Resistance Reduction, Its Effect on Vehicle Fuel Economy and Other Performance Areas,” Fall Meeting of Akron Rubber Group October 1978