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Development of a Road Friction Dynamometer
Technical Paper
2011-28-0099
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The European Regulation on Braking of two, three and four
wheelers specifies a friction coefficient of 0.8 μ for which the
determination of the coefficient of adhesion utilization by actual
test was sufficient. The Global Technical Regulations on motorcycle
and passenger car braking, Federal Motor Safety Standards on Brakes
and ESC now require the friction coefficient of the test track to
be greater than 0.9. This friction coefficient is evaluated by
(ASTM) E1136 standard reference test tire, in accordance with ASTM
Method E1337-90, at a speed of 64 km/h (40 mph) without water
delivery. Very few test centers in Europe use this equipment for
calculating the friction although it is a standard method followed
in USA.
A road friction dynamometer has been designed and developed by
Mahindra in India to determine the peak braking coefficient under
dry conditions on different surfaces. The paper describes the
salient features of the road friction dynamometer, its functioning,
operation and process of acquiring the data for determination of
the peak braking coefficient.
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Citation
Kulkarni, S. and Mujawar, Z., "Development of a Road Friction Dynamometer," SAE Technical Paper 2011-28-0099, 2011, https://doi.org/10.4271/2011-28-0099.Also In
References
- ASTM Standard E 1136 Specification for a Radial Standard Reference Test Tire
- ASTM Standard E 1337 Standard Test Method for determining Longitudinal Peak Braking Coefficient of Paved Surfaces Using a Standard Reference Test Tire